PATENT DOCUMENT

Publication Number: US-12062835-B2
Application Number: US-202117222557-A
Country: US
Kind Code: B2

Title: Wireless devices having co-existing antenna structures

Abstract:
An electronic device may be provided with first, second, and third antennas and a dock flex. A first feed terminal for the first antenna may be coupled to a second feed terminal for the second antenna over a first path. The first path may be coupled to ground over a second path. Tuning components may be interposed on the first and second paths. The third antenna may be patterned on a first portion of the dock flex. Front end components for the first antenna may be mounted to a second portion of the dock flex. The first and second portions may extend from a tail of the dock flex. The tail may be wrapped around a plastic support block to hold the second portion over the first portion. The plastic support block may have a snap hook clip that holds the second portion in place.

Claims:
What is claimed is: 
     
       1. An electronic device comprising:
 a housing having peripheral conductive structures; 
 a dielectric-filled gap in the peripheral conductive structures that divides the peripheral conductive structures into first and second segments; 
 an antenna ground; 
 a first slot that separates the antenna ground from the first segment; 
 a second slot that extends from an end of the first slot and beyond an edge of the dielectric-filled gap in the peripheral conductive structures, wherein the second slot has edges defined by the antenna ground and the second segment; 
 a first antenna feed having a first positive antenna feed terminal coupled to the first segment and a first ground antenna feed terminal coupled to the antenna ground; 
 a first radio-frequency transmission line coupled to the first antenna feed; 
 a second antenna feed having a second positive antenna feed terminal coupled to the second segment and a second ground antenna feed terminal coupled to the antenna ground; 
 a second radio-frequency transmission line coupled to the second antenna feed; 
 a conductive path that couples the first positive antenna feed terminal to the second positive antenna feed terminal; and 
 an additional conductive path that couples a node on the conductive path to the antenna ground. 
 
     
     
       2. The electronic device of  claim 1 , further comprising:
 a return path coupled between the first segment and the antenna ground. 
 
     
     
       3. The electronic device of  claim 2 , further comprising:
 a first antenna tuning component interposed on the return path; and 
 a second antenna tuning component interposed on the conductive path. 
 
     
     
       4. The electronic device of  claim 1 ,
 wherein the node is between an antenna tuning component on the conductive path and the first positive antenna feed terminal. 
 
     
     
       5. The electronic device of  claim 4 , further comprising:
 an additional antenna tuning component interposed on the additional conductive path. 
 
     
     
       6. The electronic device of  claim 5 , wherein the first segment, the first antenna feed, and the first radio-frequency transmission line are configured to receive radio-frequency signals in an L5 Global Positioning System (GPS) frequency band, the second antenna feed, the second slot, and the second radio-frequency transmission line being configured to convey radio-frequency signals in a cellular ultra-high band. 
     
     
       7. The electronic device of  claim 5 , further comprising:
 a flexible printed circuit that at least partially overlaps the first slot, wherein the flexible printed circuit comprises a tail, a first portion extending from a side of the tail, and a second portion at an end of the tail; 
 an antenna resonating element arm formed from conductive traces on the first portion of the flexible printed circuit; 
 a third antenna feed coupled between the antenna resonating element arm and the antenna ground; and 
 a third radio-frequency transmission line coupled to the third antenna feed. 
 
     
     
       8. The electronic device of  claim 7 , further comprising:
 a plastic support block mounted to the tail of the flexible printed circuit, wherein the tail has a folded portion that is wrapped around the plastic support block, the plastic support block is interposed between the first and second portions of the flexible printed circuit, and the folded portion of the flexible printed circuit is laterally interposed between the plastic support block and the first segment. 
 
     
     
       9. The electronic device of  claim 7 , wherein the third antenna feed comprises a third ground antenna feed terminal, the electronic device further comprising:
 a third antenna tuning component coupled between the antenna resonating element arm and the antenna ground; 
 a first conductive screw that couples the additional conductive path to the antenna ground at a first terminal; and 
 a second conductive screw that couples the first ground antenna feed terminal, the third ground antenna feed terminal, and the third antenna tuning component to the antenna ground at a second terminal that is different from the first terminal. 
 
     
     
       10. The electronic device of  claim 8 , further comprising:
 a first grounding clip mounted to the tail of the flexible printed circuit; 
 a second grounding clip mounted to the second portion of the flexible printed circuit; and 
 a conductive screw that couples the first and second grounding clips to the antenna ground. 
 
     
     
       11. The electronic device of  claim 8 , further comprising:
 a feed clip mounted to the flexible printed circuit, wherein the feed clip couples the second radio-frequency transmission line to the second positive antenna feed terminal; 
 a bridging clip mounted to the second portion of the flexible printed circuit, wherein the bridging clip forms a part of the conductive path; and 
 a conductive screw that couples the feed clip and the bridging clip to the second segment at the second positive antenna feed terminal. 
 
     
     
       12. The electronic device of  claim 10 , wherein the plastic support block comprises a snap hook clip that holds the second portion of the flexible printed circuit in place over the first portion of the flexible printed circuit. 
     
     
       13. The electronic device of  claim 10 , wherein the first grounding clip comprises a tab, the second grounding clip comprises an opening, and the tab is inserted into the opening to hold the second portion of the flexible printed circuit in place over the first portion of the flexible printed circuit. 
     
     
       14. The electronic device of  claim 1 , further comprising:
 a flexible printed circuit mounted to the peripheral conductive structures, wherein the flexible printed circuit comprises a first portion and a tail coupled between the first portion and a second portion of the flexible printed circuit; 
 first front end circuitry mounted to the first portion of the flexible printed circuit and coupled to the first radio-frequency transmission line; and 
 second front end circuitry mounted to the second portion of the flexible printed circuit and coupled to the second radio-frequency transmission line. 
 
     
     
       15. The electronic device of  claim 14 , wherein the flexible printed circuit comprises a third portion that extends from a side of the tail, the electronic device further comprising:
 an antenna resonating element arm on the third portion of the flexible printed circuit. 
 
     
     
       16. The electronic device of  claim 15 , further comprising:
 a plastic support block on the tail, wherein the tail and the second portion of the flexible printed circuit are wrapped around the plastic support block, the second portion of the flexible printed circuit at least partially overlapping the third portion of the flexible printed circuit. 
 
     
     
       17. The electronic device of  claim 16 , wherein the plastic support block comprises a snap hook clip that is configured to hold the tail and the second portion of the flexible printed circuit in place. 
     
     
       18. The electronic device of  claim 16 , wherein the antenna ground comprises a conductive support plate, the electronic device further comprising:
 a grounding clip at least partially embedded in the plastic support block; and 
 a conductive screw that couples the grounding clip to the conductive support plate. 
 
     
     
       19. An electronic device comprising:
 a housing having peripheral conductive structures; 
 a dielectric-filled gap in the peripheral conductive structures that divides the peripheral conductive structures into first and second segments; 
 an antenna ground; 
 a first slot that separates the antenna ground from the first segment; 
 a second slot that extends from an end of the first slot and beyond an edge of the dielectric-filled gap in the peripheral conductive structures, wherein the second slot has edges defined by the antenna ground and the second segment; 
 a first antenna feed having a first positive antenna feed terminal coupled to the first segment and a first ground antenna feed terminal coupled to the antenna ground; 
 a first radio-frequency transmission line coupled to the first antenna feed; 
 a second antenna feed having a second positive antenna feed terminal coupled to the second segment and a second ground antenna feed terminal coupled to the antenna ground; 
 a second radio-frequency transmission line coupled to the second antenna feed; 
 a flexible printed circuit; 
 an antenna on the flexible printed circuit; 
 first and second board-to-board connectors on the flexible printed circuit; and 
 a dock port on the flexible printed circuit and coupled to the second board-to-board connector, wherein the first radio-frequency transmission line is on the flexible printed circuit and extends from the first board-to-board connector toward the first antenna feed, and the second radio-frequency transmission line is on the flexible printed circuit and extends from the first board-to-board connector toward the second antenna feed. 
 
     
     
       20. An electronic device comprising:
 a housing having peripheral conductive structures; 
 a dielectric-filled gap in the peripheral conductive structures that divides the peripheral conductive structures into first and second segments; 
 an antenna ground; 
 a first slot that separates the antenna ground from the first segment; 
 a second slot that extends from an end of the first slot and beyond an edge of the dielectric-filled gap in the peripheral conductive structures, wherein the second slot has edges defined by the antenna ground and the second segment; 
 a first antenna feed having a first positive antenna feed terminal coupled to the first segment and a first ground antenna feed terminal coupled to the antenna ground; 
 a first radio-frequency transmission line coupled to the first antenna feed; 
 a second antenna feed having a second positive antenna feed terminal coupled to the second segment and a second ground antenna feed terminal coupled to the antenna ground; 
 a second radio-frequency transmission line coupled to the second antenna feed; 
 a flexible printed circuit mounted to the peripheral conductive structures; 
 first front end circuitry mounted to the flexible printed circuit and coupled to the first radio-frequency transmission line; 
 second front end circuitry mounted to the flexible printed circuit and coupled to the second radio-frequency transmission line; and 
 an antenna resonating element arm on the flexible printed circuit.

Description:
This application claims the benefit of provisional patent application No. 63/077,419, filed Sep. 11, 2020, which is hereby incorporated by reference herein in its entirety. 
    
    
     BACKGROUND 
     This relates generally to electronic devices and, more particularly, to electronic devices with wireless communications capabilities. 
     Electronic devices such as portable computers and cellular telephones are often provided with wireless communications capabilities. To satisfy consumer demand for small form factor wireless devices, manufacturers are continually striving to implement wireless communications circuitry such as antenna components using compact structures. At the same time, there is a desire for wireless devices to cover a growing number of communications bands. 
     Because antennas have the potential to interfere with each other and with components in a wireless device, care must be taken when incorporating antennas into an electronic device. Moreover, care must be taken to ensure that the antennas and wireless circuitry in a device are able to exhibit satisfactory performance over a range of operating frequencies and with satisfactory efficiency bandwidth. 
     It would therefore be desirable to be able to provide improved wireless communications circuitry for wireless electronic devices. 
     SUMMARY 
     An electronic device may be provided with wireless circuitry and a housing having peripheral conductive housing structures and a conductive support plate. The peripheral conductive housing structures may include first and second segments at a lower end of the device. The first and second segments may be separated from the conductive support plate by a slot. The first segment may form a first antenna resonating element arm for a first antenna. The second segment may form part of an open slot antenna resonating element for a second antenna. 
     The first antenna may be fed using a first positive antenna feed terminal on the first segment and a first radio-frequency transmission line coupled to the first positive antenna feed terminal. The second antenna may be fed using a second positive antenna feed terminal on the second segment and a second radio-frequency transmission line coupled to the second positive antenna feed terminal. A first conductive path may couple the first positive antenna feed terminal to the second positive antenna feed terminal. A second conductive path may couple a node on the first conductive path to the conductive support plate. A return path for the first antenna may couple the first segment to the conductive support plate. A first antenna tuning component for the first antenna may be interposed on the first conductive path. A second antenna tuning component for the first antenna may be interposed on the second conductive path. A third antenna tuning component for the first antenna may be interposed on the return path. 
     A flexible printed circuit may be mounted to the conductive support plate and the peripheral conductive housing structures. The flexible printed circuit may have a dock portion. A dock may be mounted to the dock portion. The flexible printed circuit may have first and second tails extending from a first side of the dock portion. The flexible printed circuit may have a third tail extending from a second side of the dock portion. The flexible printed circuit may have a first portion at an end of the third tail and a second portion extending from a side of the third tail. A third antenna may be formed on the second portion and may be fed using a third radio-frequency transmission line. The first radio-frequency transmission line may be coupled to the first positive antenna feed terminal through the first portion, the third tail, and the dock portion. The second radio-frequency transmission line may be coupled to the second positive antenna feed terminal through part of the third tail and the dock portion. 
     A plastic support block may be mounted to the third tail. The third tail may have a folded portion. The folded portion of the third tail and the first portion of the flexible printed circuit may be wrapped around the plastic support block. The plastic support block may have a snap hook clip that holds the first portion of the flexible printed circuit in place over the second portion of the flexible printed circuit. A bridging clip may couple the first portion to a feed clip for the second antenna. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a perspective view of an illustrative electronic device in accordance with some embodiments. 
         FIG.  2    is a schematic diagram of illustrative circuitry in an electronic device in accordance with some embodiments. 
         FIG.  3    is a schematic diagram of illustrative wireless circuitry in accordance with some embodiments. 
         FIG.  4    is a cross-sectional side view of an electronic device having housing structures that may be used in forming antenna structures in accordance with some embodiments. 
         FIG.  5    is a top interior view of an illustrative electronic device having slots and segments of peripheral conductive housing structures that are used in forming multiple antennas for the electronic device in accordance with some embodiments. 
         FIG.  6    is a diagram showing how an illustrative electronic device may include multiple antennas at different ends of the electronic device accordance with some embodiments. 
         FIG.  7    is a chart of illustrative frequency bands that may be covered by antennas in an electronic device in accordance with some embodiments. 
         FIG.  8    is a top interior view of a corner of an illustrative electronic device having co-existing antennas in accordance with some embodiments. 
         FIG.  9    is a plot of antenna performance (antenna efficiency) as a function of frequency for an illustrative antenna in accordance with some embodiments. 
         FIG.  10    is a perspective view of an illustrative flexible printed circuit having structures for coexisting antennas in accordance with some embodiments. 
         FIG.  11    is a perspective view showing how an illustrative flexible printed circuit of the type shown in  FIG.  10    may be folded for integration within a device in accordance with some embodiments. 
         FIG.  12    is a perspective view showing how a portion of an illustrative flexible printed circuit may be folded around a plastic support block in accordance with some embodiments. 
         FIG.  13    is a perspective view showing how a portion of an illustrative flexible printed circuit may be folded around a plastic support block and integrated within a device in accordance with some embodiments. 
         FIG.  14    is a perspective view of illustrative clip structures that may be used to couple a folded flexible printed circuit to an antenna ground in accordance with some embodiments. 
         FIG.  15    is a top interior view showing how an illustrative flexible printed circuit may be screwed into a device in accordance with some embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     An electronic device such as electronic device  10  of  FIG.  1    may be provided with wireless circuitry that includes antennas. The antennas may be used to transmit and/or receive wireless radio-frequency signals. 
     Device  10  may be a portable electronic device or other suitable electronic device. For example, device  10  may be a laptop computer, a tablet computer, a somewhat smaller device such as a wrist-watch device, pendant device, headphone device, earpiece device, headset device, or other wearable or miniature device, a handheld device such as a cellular telephone, a media player, or other small portable device. Device  10  may also be a set-top box, a desktop computer, a display into which a computer or other processing circuitry has been integrated, a display without an integrated computer, a wireless access point, a wireless base station, an electronic device incorporated into a kiosk, building, or vehicle, or other suitable electronic equipment. 
     Device  10  may include a housing such as housing  12 . Housing  12 , which may sometimes be referred to as a case, may be formed of plastic, glass, ceramics, fiber composites, metal (e.g., stainless steel, aluminum, etc.), other suitable materials, or a combination of these materials. In some situations, parts of housing  12  may be formed from dielectric or other low-conductivity material (e.g., glass, ceramic, plastic, sapphire, etc.). In other situations, housing  12  or at least some of the structures that make up housing  12  may be formed from metal elements. 
     Device  10  may, if desired, have a display such as display  14 . Display  14  may be mounted on the front face of device  10 . Display  14  may be a touch screen that incorporates capacitive touch electrodes or may be insensitive to touch. The rear face of housing  12  (i.e., the face of device  10  opposing the front face of device  10 ) may have a substantially planar housing wall such as rear housing wall  12 R (e.g., a planar housing wall). Rear housing wall  12 R may have slots that pass entirely through the rear housing wall and that therefore separate portions of housing  12  from each other. Rear housing wall  12 R may include conductive portions and/or dielectric portions. If desired, rear housing wall  12 R may include a planar metal layer covered by a thin layer or coating of dielectric such as glass, plastic, sapphire, or ceramic (e.g., a dielectric cover layer). Housing  12  may also have shallow grooves that do not pass entirely through housing  12 . The slots and grooves may be filled with plastic or other dielectric materials. If desired, portions of housing  12  that have been separated from each other (e.g., by a through slot) may be joined by internal conductive structures (e.g., sheet metal or other metal members that bridge the slot). 
     Housing  12  may include peripheral housing structures such as peripheral structures  12 W. Conductive portions of peripheral structures  12 W and conductive portions of rear housing wall  12 R may sometimes be referred to herein collectively as conductive structures of housing  12 . Peripheral structures  12 W may run around the periphery of device  10  and display  14 . In configurations in which device  10  and display  14  have a rectangular shape with four edges, peripheral structures  12 W may be implemented using peripheral housing structures that have a rectangular ring shape with four corresponding edges and that extend from rear housing wall  12 R to the front face of device  10  (as an example). In other words, device  10  may have a length (e.g., measured parallel to the Y-axis), a width that is less than the length (e.g., measured parallel to the X-axis), and a height (e.g., measured parallel to the Z-axis) that is less than the width. Peripheral structures  12 W or part of peripheral structures  12 W may serve as a bezel for display  14  (e.g., a cosmetic trim that surrounds all four sides of display  14  and/or that helps hold display  14  to device  10 ) if desired. Peripheral structures  12 W may, if desired, form sidewall structures for device  10  (e.g., by forming a metal band with vertical sidewalls, curved sidewalls, etc.). 
     Peripheral structures  12 W may be formed of a conductive material such as metal and may therefore sometimes be referred to as peripheral conductive housing structures, conductive housing structures, peripheral metal structures, peripheral conductive sidewalls, peripheral conductive sidewall structures, conductive housing sidewalls, peripheral conductive housing sidewalls, sidewalls, sidewall structures, or a peripheral conductive housing member (as examples). Peripheral conductive housing structures  12 W may be formed from a metal such as stainless steel, aluminum, alloys, or other suitable materials. One, two, or more than two separate structures may be used in forming peripheral conductive housing structures  12 W. 
     It is not necessary for peripheral conductive housing structures  12 W to have a uniform cross-section. For example, the top portion of peripheral conductive housing structures  12 W may, if desired, have an inwardly protruding ledge that helps hold display  14  in place. The bottom portion of peripheral conductive housing structures  12 W may also have an enlarged lip (e.g., in the plane of the rear surface of device  10 ). Peripheral conductive housing structures  12 W may have substantially straight vertical sidewalls, may have sidewalls that are curved, or may have other suitable shapes. In some configurations (e.g., when peripheral conductive housing structures  12 W serve as a bezel for display  14 ), peripheral conductive housing structures  12 W may run around the lip of housing  12  (i.e., peripheral conductive housing structures  12 W may cover only the edge of housing  12  that surrounds display  14  and not the rest of the sidewalls of housing  12 ). 
     Rear housing wall  12 R may lie in a plane that is parallel to display  14 . In configurations for device  10  in which some or all of rear housing wall  12 R is formed from metal, it may be desirable to form parts of peripheral conductive housing structures  12 W as integral portions of the housing structures forming rear housing wall  12 R. For example, rear housing wall  12 R of device  10  may include a planar metal structure and portions of peripheral conductive housing structures  12 W on the sides of housing  12  may be formed as flat or curved vertically extending integral metal portions of the planar metal structure (e.g., housing structures  12 R and  12 W may be formed from a continuous piece of metal in a unibody configuration). Housing structures such as these may, if desired, be machined from a block of metal and/or may include multiple metal pieces that are assembled together to form housing  12 . Rear housing wall  12 R may have one or more, two or more, or three or more portions. Peripheral conductive housing structures  12 W and/or conductive portions of rear housing wall  12 R may form one or more exterior surfaces of device  10  (e.g., surfaces that are visible to a user of device  10 ) and/or may be implemented using internal structures that do not form exterior surfaces of device  10  (e.g., conductive housing structures that are not visible to a user of device  10  such as conductive structures that are covered with layers such as thin cosmetic layers, protective coatings, and/or other coating/cover layers that may include dielectric materials such as glass, ceramic, plastic, or other structures that form the exterior surfaces of device  10  and/or serve to hide peripheral conductive housing structures  12 W and/or conductive portions of rear housing wall  12 R from view of the user). 
     Display  14  may have an array of pixels that form an active area AA that displays images for a user of device  10 . For example, active area AA may include an array of display pixels. The array of pixels may be formed from liquid crystal display (LCD) components, an array of electrophoretic pixels, an array of plasma display pixels, an array of organic light-emitting diode display pixels or other light-emitting diode pixels, an array of electrowetting display pixels, or display pixels based on other display technologies. If desired, active area AA may include touch sensors such as touch sensor capacitive electrodes, force sensors, or other sensors for gathering a user input. 
     Display  14  may have an inactive border region that runs along one or more of the edges of active area AA. Inactive area IA of display  14  may be free of pixels for displaying images and may overlap circuitry and other internal device structures in housing  12 . To block these structures from view by a user of device  10 , the underside of the display cover layer or other layers in display  14  that overlap inactive area IA may be coated with an opaque masking layer in inactive area IA. The opaque masking layer may have any suitable color. Inactive area IA may include a recessed region such as notch  24  that extends into active area AA. Active area AA may, for example, be defined by the lateral area of a display module for display  14  (e.g., a display module that includes pixel circuitry, touch sensor circuitry, etc.). The display module may have a recess or notch in upper region  20  of device  10  that is free from active display circuitry (i.e., that forms notch  24  of inactive area IA). Notch  24  may be a substantially rectangular region that is surrounded (defined) on three sides by active area AA and on a fourth side by peripheral conductive housing structures  12 W. 
     Display  14  may be protected using a display cover layer such as a layer of transparent glass, clear plastic, transparent ceramic, sapphire, or other transparent crystalline material, or other transparent layer(s). The display cover layer may have a planar shape, a convex curved profile, a shape with planar and curved portions, a layout that includes a planar main area surrounded on one or more edges with a portion that is bent out of the plane of the planar main area, or other suitable shapes. The display cover layer may cover the entire front face of device  10 . In another suitable arrangement, the display cover layer may cover substantially all of the front face of device  10  or only a portion of the front face of device  10 . Openings may be formed in the display cover layer. For example, an opening may be formed in the display cover layer to accommodate a button. An opening may also be formed in the display cover layer to accommodate ports such as speaker port  16  in notch  24  or a microphone port. Openings may be formed in housing  12  to form communications ports (e.g., an audio jack port, a digital data port, etc.) and/or audio ports for audio components such as a speaker and/or a microphone if desired. 
     Display  14  may include conductive structures such as an array of capacitive electrodes for a touch sensor, conductive lines for addressing pixels, driver circuits, etc. Housing  12  may include internal conductive structures such as metal frame members and a planar conductive housing member (sometimes referred to as a conductive support plate or backplate) that spans the walls of housing  12  (e.g., a substantially rectangular sheet formed from one or more metal parts that is welded or otherwise connected between opposing sides of peripheral conductive housing structures  12 W). The conductive support plate may form an exterior rear surface of device  10  or may be covered by a dielectric cover layer such as a thin cosmetic layer, protective coating, and/or other coatings that may include dielectric materials such as glass, ceramic, plastic, or other structures that form the exterior surfaces of device  10  and/or serve to hide the conductive support plate from view of the user (e.g., the conductive support plate may form part of rear housing wall  12 R). Device  10  may also include conductive structures such as printed circuit boards, components mounted on printed circuit boards, and other internal conductive structures. These conductive structures, which may be used in forming a ground plane in device  10 , may extend under active area AA of display  14 , for example. 
     In regions  22  and  20 , openings may be formed within the conductive structures of device  10  (e.g., between peripheral conductive housing structures  12 W and opposing conductive ground structures such as conductive portions of rear housing wall  12 R, conductive traces on a printed circuit board, conductive electrical components in display  14 , etc.). These openings, which may sometimes be referred to as gaps, may be filled with air, plastic, and/or other dielectrics and may be used in forming slot antenna resonating elements for one or more antennas in device  10 , if desired. 
     Conductive housing structures and other conductive structures in device  10  may serve as a ground plane for the antennas in device  10 . The openings in regions  22  and  20  may serve as slots in open or closed slot antennas, may serve as a central dielectric region that is surrounded by a conductive path of materials in a loop antenna, may serve as a space that separates an antenna resonating element such as a strip antenna resonating element or an inverted-F antenna resonating element from the ground plane, may contribute to the performance of a parasitic antenna resonating element, or may otherwise serve as part of antenna structures formed in regions  22  and  20 . If desired, the ground plane that is under active area AA of display  14  and/or other metal structures in device  10  may have portions that extend into parts of the ends of device  10  (e.g., the ground may extend towards the dielectric-filled openings in regions  22  and  20 ), thereby narrowing the slots in regions  22  and  20 . Region  22  may sometimes be referred to herein as lower region  22  or lower end  22  of device  10 . Region  20  may sometimes be referred to herein as upper region  20  or upper end  20  of device  10 . 
     In general, device  10  may include any suitable number of antennas (e.g., one or more, two or more, three or more, four or more, etc.). The antennas in device  10  may be located at opposing first and second ends of an elongated device housing (e.g., at lower region  22  and/or upper region  20  of device  10  of  FIG.  1   ), along one or more edges of a device housing, in the center of a device housing, in other suitable locations, or in one or more of these locations. The arrangement of  FIG.  1    is merely illustrative. 
     Portions of peripheral conductive housing structures  12 W may be provided with peripheral gap structures. For example, peripheral conductive housing structures  12 W may be provided with one or more dielectric-filled gaps such as gaps  18 , as shown in  FIG.  1   . The gaps in peripheral conductive housing structures  12 W may be filled with dielectric such as polymer, ceramic, glass, air, other dielectric materials, or combinations of these materials. Gaps  18  may divide peripheral conductive housing structures  12 W into one or more peripheral conductive segments. The conductive segments that are formed in this way may form parts of antennas in device  10  if desired. Other dielectric openings may be formed in peripheral conductive housing structures  12 W (e.g., dielectric openings other than gaps  18 ) and may serve as dielectric antenna windows for antennas mounted within the interior of device  10 . Antennas within device  10  may be aligned with the dielectric antenna windows for conveying radio-frequency signals through peripheral conductive housing structures  12 W. Antennas within device  10  may also be aligned with inactive area IA of display  14  for conveying radio-frequency signals through display  14 . 
     In order to provide an end user of device  10  with as large of a display as possible (e.g., to maximize an area of the device used for displaying media, running applications, etc.), it may be desirable to increase the amount of area at the front face of device  10  that is covered by active area AA of display  14 . Increasing the size of active area AA may reduce the size of inactive area IA within device  10 . This may reduce the area behind display  14  that is available for antennas within device  10 . For example, active area AA of display  14  may include conductive structures that serve to block radio-frequency signals handled by antennas mounted behind active area AA from radiating through the front face of device  10 . It would therefore be desirable to be able to provide antennas that occupy a small amount of space within device  10  (e.g., to allow for as large of a display active area AA as possible) while still allowing the antennas to communicate with wireless equipment external to device  10  with satisfactory efficiency bandwidth. 
     In a typical scenario, device  10  may have one or more upper antennas and one or more lower antennas. An upper antenna may, for example, be formed in upper region  20  of device  10 . A lower antenna may, for example, be formed in lower region  22  of device  10 . Additional antennas may be formed along the edges of housing  12  extending between regions  20  and  22  if desired. An example in which device  10  includes three or four upper antennas and five lower antennas is described herein as an example. The antennas may be used separately to cover identical communications bands, overlapping communications bands, or separate communications bands. The antennas may be used to implement an antenna diversity scheme or a multiple-input-multiple-output (MIMO) antenna scheme. Other antennas for covering any other desired frequencies may also be mounted at any desired locations within the interior of device  10 . The example of  FIG.  1    is merely illustrative. If desired, housing  12  may have other shapes (e.g., a square shape, cylindrical shape, spherical shape, combinations of these and/or different shapes, etc.). 
     A schematic diagram of illustrative components that may be used in device  10  is shown in  FIG.  2   . As shown in  FIG.  2   , device  10  may include control circuitry  38 . Control circuitry  38  may include storage such as storage circuitry  30 . Storage circuitry  30  may include hard disk drive storage, nonvolatile memory (e.g., flash memory or other electrically-programmable-read-only memory configured to form a solid-state drive), volatile memory (e.g., static or dynamic random-access-memory), etc. 
     Control circuitry  38  may include processing circuitry such as processing circuitry  32 . Processing circuitry  32  may be used to control the operation of device  10 . Processing circuitry  32  may include on one or more microprocessors, microcontrollers, digital signal processors, host processors, baseband processor integrated circuits, application specific integrated circuits, central processing units (CPUs), etc. Control circuitry  38  may be configured to perform operations in device  10  using hardware (e.g., dedicated hardware or circuitry), firmware, and/or software. Software code for performing operations in device  10  may be stored on storage circuitry  30  (e.g., storage circuitry  30  may include non-transitory (tangible) computer readable storage media that stores the software code). The software code may sometimes be referred to as program instructions, software, data, instructions, or code. Software code stored on storage circuitry  30  may be executed by processing circuitry  32 . 
     Control circuitry  38  may be used to run software on device  10  such as internet browsing applications, voice-over-internet-protocol (VOIP) telephone call applications, email applications, media playback applications, operating system functions, etc. To support interactions with external equipment, control circuitry  38  may be used in implementing communications protocols. Communications protocols that may be implemented using control circuitry  38  include internet protocols, wireless local area network protocols (e.g., IEEE 802.11 protocols—sometimes referred to as WiFi®), protocols for other short-range wireless communications links such as the Bluetooth® protocol or other WPAN protocols, IEEE 802.11ad protocols, cellular telephone protocols, MIMO protocols, antenna diversity protocols, satellite navigation system protocols, antenna-based spatial ranging protocols (e.g., radio detection and ranging (RADAR) protocols or other desired range detection protocols for signals conveyed at millimeter and centimeter wave frequencies), etc. Each communication protocol may be associated with a corresponding radio access technology (RAT) that specifies the physical connection methodology used in implementing the protocol. 
     Device  10  may include input-output circuitry  26 . Input-output circuitry  26  may include input-output devices  28 . Input-output devices  28  may be used to allow data to be supplied to device  10  and to allow data to be provided from device  10  to external devices. Input-output devices  28  may include user interface devices, data port devices, sensors, and other input-output components. For example, input-output devices may include touch screens, displays without touch sensor capabilities, buttons, joysticks, scrolling wheels, touch pads, key pads, keyboards, microphones, cameras, speakers, status indicators, light sources, audio jacks and other audio port components, digital data port devices, light sensors, gyroscopes, accelerometers or other components that can detect motion and device orientation relative to the Earth, capacitance sensors, proximity sensors (e.g., a capacitive proximity sensor and/or an infrared proximity sensor), magnetic sensors, and other sensors and input-output components. 
     Input-output circuitry  26  may include wireless circuitry such as wireless circuitry  34  for wirelessly conveying radio-frequency signals. While control circuitry  38  is shown separately from wireless circuitry  34  in the example of  FIG.  2    for the sake of clarity, wireless circuitry  34  may include processing circuitry that forms a part of processing circuitry  32  and/or storage circuitry that forms a part of storage circuitry  30  of control circuitry  38  (e.g., portions of control circuitry  38  may be implemented on wireless circuitry  34 ). As an example, control circuitry  38  may include baseband processor circuitry or other control components that form a part of wireless circuitry  34 . 
     Wireless circuitry  34  may include radio-frequency (RF) transceiver circuitry formed from one or more integrated circuits, power amplifier circuitry, low-noise input amplifiers, passive RF components, one or more antennas, transmission lines, and other circuitry for handling RF wireless signals. Wireless signals can also be sent using light (e.g., using infrared communications). 
     Wireless circuitry  34  may include radio-frequency transceiver circuitry  36  for handling transmission and/or reception of radio-frequency signals in various radio-frequency communications bands. For example, radio-frequency transceiver circuitry  36  may handle wireless local area network (WLAN) communications bands such as the 2.4 GHz and 5 GHz Wi-Fi® (IEEE 802.11) bands, wireless personal area network (WPAN) communications bands such as the 2.4 GHz Bluetooth® communications band, cellular telephone communications bands such as a cellular low band (LB) (e.g., 600 to 960 MHz), a cellular low-midband (LMB) (e.g., 1400 to 1550 MHz), a cellular midband (MB) (e.g., from 1700 to 2200 MHz), a cellular high band (HB) (e.g., from 2300 to 2700 MHz), a cellular ultra-high band (UHB) (e.g., from 3300 to 5000 MHz, or other cellular communications bands between about 600 MHz and about 5000 MHz (e.g., 3G bands, 4G LTE bands, 5G New Radio Frequency Range 1 (FR1) bands below 10 GHz, 5G New Radio Frequency Range 2 (FR2) bands at millimeter and centimeter wavelengths between 20 and 60 GHz, etc.), a near-field communications (NFC) band (e.g., at 13.56 MHz), satellite navigations bands (e.g., an L1 global positioning system (GPS) band at 1575 MHz, an L5 GPS band at 1176 MHz, a Global Navigation Satellite System (GLONASS) band, a BeiDou Navigation Satellite System (BDS) band, etc.), an ultra-wideband (UWB) communications band supported by the IEEE 802.15.4 protocol and/or other UWB communications protocols (e.g., a first UWB communications band at 6.5 GHz and/or a second UWB communications band at 8.0 GHz), and/or any other desired communications bands. The communications bands handled by radio-frequency transceiver circuitry  36  may sometimes be referred to herein as frequency bands or simply as “bands,” and may span corresponding ranges of frequencies. 
     In one suitable arrangement that is described herein as an example, the UHB band handled by radio-frequency transceiver circuitry  36  may include 4G bands between 3300 and 5000 MHz such as Long Term Evolution (LTE) bands B42 (e.g., 3400 MHz-3600 MHz), B46 (e.g., 5150-5925 MHz), and/or B48 (e.g., 3500-3700 MHz), as well as 5G bands below 6 GHz (e.g., 5G NR FR1 bands) such as 5G bands N77 (e.g., 3300-4200 MHz), N78 (e.g., 3300-3800 MHz), and/or N79 (e.g., 4400-5000 MHz). The UWB communications handled by radio-frequency transceiver circuitry  36  may be based on an impulse radio signaling scheme that uses band-limited data pulses. Radio-frequency signals in the UWB frequency band may have any desired bandwidths such as bandwidths between 499 MHz and 1331 MHz, bandwidths greater than 500 MHz, etc. The presence of lower frequencies in the baseband may sometimes allow ultra-wideband signals to penetrate through objects such as walls. In an IEEE 802.15.4 system, for example, a pair of electronic devices may exchange wireless time stamped messages. Time stamps in the messages may be analyzed to determine the time of flight of the messages and thereby determine the distance (range) between the devices and/or an angle between the devices (e.g., an angle of arrival of incoming radio-frequency signals). 
     Radio-frequency transceiver circuitry  36  may include respective transceivers (e.g., transceiver integrated circuits or chips) that handle each of these frequency bands or any desired number of transceivers that handle two or more of these frequency bands. In scenarios where different transceivers are coupled to the same antenna, filter circuitry (e.g., duplexer circuitry, diplexer circuitry, low pass filter circuitry, high pass filter circuitry, band pass filter circuitry, band stop filter circuitry, etc.), switching circuitry, multiplexing circuitry, or any other desired circuitry may be used to isolate radio-frequency signals conveyed by each transceiver over the same antenna (e.g., filtering circuitry or multiplexing circuitry may be interposed on a radio-frequency transmission line shared by the transceivers). Radio-frequency transceiver circuitry  36  may include one or more integrated circuits (chips), integrated circuit packages (e.g., multiple integrated circuits mounted on a common printed circuit in a system-in-package device, one or more integrated circuits mounted on different substrates, etc.), power amplifier circuitry, up-conversion circuitry, down-conversion circuitry, low-noise input amplifiers, passive radio-frequency components, switching circuitry, transmission line structures, and other circuitry for handling radio-frequency signals and/or for converting signals between radio-frequencies, intermediate frequencies, and/or baseband frequencies. 
     In general, radio-frequency transceiver circuitry  36  may cover (handle) any desired frequency bands of interest. As shown in  FIG.  2   , wireless circuitry  34  may include antennas  40 . Radio-frequency transceiver circuitry  36  may convey radio-frequency signals using one or more antennas  40  (e.g., antennas  40  may convey the radio-frequency signals for the transceiver circuitry). The term “convey radio-frequency signals” as used herein means the transmission and/or reception of the radio-frequency signals (e.g., for performing unidirectional and/or bidirectional wireless communications with external wireless communications equipment). Antennas  40  may transmit the radio-frequency signals by radiating the radio-frequency signals into free space (or to freespace through intervening device structures such as a dielectric cover layer). Antennas  40  may additionally or alternatively receive the radio-frequency signals from free space (e.g., through intervening devices structures such as a dielectric cover layer). The transmission and reception of radio-frequency signals by antennas  40  each involve the excitation or resonance of antenna currents on an antenna resonating element in the antenna by the radio-frequency signals within the frequency band(s) of operation of the antenna. 
     Antennas  40  in wireless circuitry  34  may be formed using any suitable antenna types. For example, antennas  40  may include antennas with resonating elements that are formed from stacked patch antenna structures, loop antenna structures, patch antenna structures, inverted-F antenna structures, slot antenna structures, planar inverted-F antenna structures, waveguide structures, monopole antenna structures, dipole antenna structures, helical antenna structures, Yagi (Yagi-Uda) antenna structures, hybrids of these designs, etc. In another suitable arrangement, antennas  40  may include antennas with dielectric resonating elements such as dielectric resonator antennas. If desired, one or more of antennas  40  may be cavity-backed antennas. Two or more antennas  40  may be arranged in a phased antenna array if desired (e.g., for conveying centimeter and/or millimeter wave signals). Different types of antennas may be used for different bands and combinations of bands. 
       FIG.  3    is a schematic diagram showing how a given antenna  40  may be fed by radio-frequency transceiver circuitry  36 . As shown in  FIG.  3   , antenna  40  may have a corresponding antenna feed  50 . Antenna  40  may include an antenna resonating element and an antenna ground. Antenna feed  50  may include a positive antenna feed terminal  52  coupled to the antenna resonating element and a ground antenna feed terminal  44  coupled to the antenna ground. 
     Radio-frequency transceiver circuitry  36  may be coupled to antenna feed  50  using a radio-frequency transmission line path  42  (sometimes referred to herein as transmission line path  42 ). Transmission line path  42  may include a signal conductor such as signal conductor  46  (e.g., a positive signal conductor). Transmission line path  42  may include a ground conductor such as ground conductor  48 . Ground conductor  48  may be coupled to ground antenna feed terminal  44  of antenna feed  50 . Signal conductor  46  may be coupled to positive antenna feed terminal  52  of antenna feed  50 . 
     Transmission line path  42  may include one or more radio-frequency transmission lines. The radio-frequency transmission line(s) in transmission line path  42  may include stripline transmission lines (sometimes referred to herein simply as striplines), coaxial cables, coaxial probes realized by metalized vias, microstrip transmission lines, edge-coupled microstrip transmission lines, edge-coupled stripline transmission lines, waveguide structures, combinations of these, etc. Multiple types of radio-frequency transmission line may be used to form transmission line path  42 . Filter circuitry, switching circuitry, impedance matching circuitry, phase shifter circuitry, amplifier circuitry, and/or other circuitry may be interposed on transmission line path  42 , if desired. One or more antenna tuning components for adjusting the frequency response of antenna  40  in one or more bands may be interposed on transmission line path  42  and/or may be integrated within antenna  40  (e.g., coupled between the antenna ground and the antenna resonating element of antenna  40 , coupled between different portions of the antenna resonating element of antenna  40 , etc.). 
     If desired, one or more of the radio-frequency transmission lines in transmission line path  42  may be integrated into ceramic substrates, rigid printed circuit boards, and/or flexible printed circuits. In one suitable arrangement, the radio-frequency transmission lines may be integrated within multilayer laminated structures (e.g., layers of a conductive material such as copper and a dielectric material such as a resin that are laminated together without intervening adhesive) that may be folded or bent in multiple dimensions (e.g., two or three dimensions) and that maintain a bent or folded shape after bending (e.g., the multilayer laminated structures may be folded into a particular three-dimensional shape to route around other device components and may be rigid enough to hold its shape after folding without being held in place by stiffeners or other structures). All of the multiple layers of the laminated structures may be batch laminated together (e.g., in a single pressing process) without adhesive (e.g., as opposed to performing multiple pressing processes to laminate multiple layers together with adhesive). 
     If desired, conductive electronic device structures such as conductive portions of housing  12  ( FIG.  1   ) may be used to form at least part of one or more of the antennas  40  in device  10 .  FIG.  4    is a cross-sectional side view of device  10 , showing illustrative conductive electronic device structures that may be used in forming one or more of the antennas  40  in device  10 . 
     As shown in  FIG.  4   , peripheral conductive housing structures  12 W may extend around the lateral periphery of device  10  (e.g., as measured in the X-Y plane of  FIG.  1   ). Peripheral conductive housing structures  12 W may extend from rear housing wall  12 R (e.g., at the rear face of device  10 ) to display  14  (e.g., at the front face of device  10 ). In other words, peripheral conductive housing structures  12 W may form conductive sidewalls for device  10 , a first of which is shown in the cross-sectional side view of  FIG.  4    (e.g., a given sidewall that runs along an edge of device  10  and that extends across the width or length of device  10 ). 
     Display  14  may have a display module such as display module  62  (sometimes referred to as a display panel). Display module  62  may include pixel circuitry, touch sensor circuitry, force sensor circuitry, and/or any other desired circuitry for forming active area AA of display  14 . Display  14  may include a dielectric cover layer such as display cover layer  64  that overlaps display module  62 . Display cover layer  64  may include plastic, glass, sapphire, ceramic, and/or any other desired dielectric materials. Display module  62  may emit image light and may receive sensor input (e.g., touch and/or force sensor input) through display cover layer  64 . Display cover layer  64  and display  14  may be mounted to peripheral conductive housing structures  12 W. The lateral area of display  14  that does not overlap display module  62  may form inactive area IA of display  14 . 
     As shown in  FIG.  4   , rear housing wall  12 R may be mounted to peripheral conductive housing structures  12 W (e.g., opposite display  14 ). Rear housing wall  12 R may include a conductive layer such as conductive support plate  58 . Conductive support plate  58  may extend across an entirety of the width of device  10  (e.g., between the left and right edges of device  10  as shown in  FIG.  1   ). Conductive support plate  58  may have an edge  54  that is separated from peripheral conductive housing structures  12 W by dielectric-filled slot  60  (sometimes referred to herein as opening  60 , gap  60 , or aperture  60 ). Slot  60  may be filled with air, plastic, ceramic, or other dielectric materials. Conductive support plate  58  may, if desired, provide structural and mechanical support for device  10 . 
     If desired, rear housing wall  12 R may include a dielectric cover layer such as dielectric cover layer  56 . Dielectric cover layer  56  may include glass, plastic, sapphire, ceramic, one or more dielectric coatings, or other dielectric materials. Dielectric cover layer  56  may be layered under conductive support plate  58  (e.g., conductive support plate  58  may be coupled to an interior surface of dielectric cover layer  56 ). If desired, dielectric cover layer  56  may extend across an entirety of the width of device  10  and/or an entirety of the length of device  10 . Dielectric cover layer  56  may overlap slot  60 . If desired, dielectric cover layer  56  be provided with pigmentation and/or an opaque masking layer (e.g., an ink layer) that helps to hide the interior of device  10  from view. In another suitable arrangement, dielectric cover layer  56  may be omitted and slot  60  may be filled with a solid dielectric material. 
     Conductive housing structures such as conductive support plate  58  and/or peripheral conductive housing structures  12 W (e.g., the portion of peripheral conductive housing structures  12 W opposite conductive support plate  58  at slot  60 ) may be used to form antenna structures for one or more of the antennas  40  in device  10 . For example, conductive support plate  58  may be used to form the ground plane for one or more of the antennas  40  in device  10  and/or to form one or more edges of slot antenna resonating elements (e.g., slot antenna resonating elements formed from slot  60 ) for the antennas  40  in device  10 . Peripheral conductive housing structures  12 W may form an antenna resonating element arm (e.g., an inverted-F antenna resonating element arm) for one or more of the antennas  40  in device  10 . If desired, a portion of peripheral conductive housing structures  12 W and/or a portion of conductive support plate  58  (e.g., at edge  54  of slot  60 ) may form part of a conductive loop path used to form a loop antenna resonating element for antenna  40  that conveys radio-frequency signals in an NFC band. 
     If desired, device  10  may include multiple slots  60  and peripheral conductive housing structures  12 W may include multiple dielectric gaps that divide the peripheral conductive housing structures into segments (e.g., dielectric gaps  18  of  FIG.  1   ).  FIG.  5    is a top interior view showing how device  10  may include multiple slots  60  and may include multiple dielectric gaps that divide the peripheral conductive housing structures into segments. Display  14  and other internal components have been removed from the view shown in  FIG.  5    for the sake of clarity. 
     As shown in  FIG.  5   , peripheral conductive housing structures  12 W may include a first conductive sidewall at the left edge of device  10 , a second conductive sidewall at the top edge of device  10 , a third conductive sidewall at the right edge of device  10 , and a fourth conductive sidewall at the bottom edge of device  10  (e.g., in an example where device  10  has a substantially rectangular lateral shape). Peripheral conductive housing structures  12 W may be segmented by dielectric-filled gaps  18  such as a first gap  18 - 1 , a second gap  18 - 2 , a third gap  18 - 3 , a fourth gap  18 - 4 , a fifth gap  18 - 5 , and a sixth gap  18 - 6 . Gaps  18 - 1 ,  18 - 2 ,  18 - 3 ,  18 - 4 ,  18 - 5 , and  18 - 6  may be filled with plastic, ceramic, sapphire, glass, epoxy, or other dielectric materials. The dielectric material in the gaps may lie flush with peripheral conductive housing structures  12 W at the exterior surface of device  10  if desired. 
     Gap  18 - 1  may divide the first conductive sidewall to separate segment  76  of peripheral conductive housing structures  12 W from segment  66  of peripheral conductive housing structures  12 W. Gap  18 - 2  may divide the second conductive sidewall to separate segment  66  from segment  68  of peripheral conductive housing structures  12 W. Gap  18 - 3  may divide the third conductive sidewall to separate segment  68  from segment  70  of peripheral conductive housing structures  12 W. Gap  18 - 4  may divide the third conductive sidewall to separate segment  70  from segment  72  of peripheral conductive housing structures  12 W. Gap  18 - 5  may divide the fourth conductive sidewall to separate segment  72  from segment  74  of peripheral conductive housing structures  12 W. Gap  18 - 6  may divide the first conductive sidewall to separate segment  74  from segment  76 . 
     In this example, segment  66  forms the top-left corner of device  10  (e.g., segment  66  may have a bend at the corner) and is formed from the first and second conductive sidewalls of peripheral conductive housing structures  12 W (e.g., in upper region  20  of device  10 ). Segment  68  forms the top-right corner of device  10  (e.g., segment  68  may have a bend at the corner) and is formed from the second and third conductive sidewalls of peripheral conductive housing structures  12 W (e.g., in upper region  20  of device  10 ). Segment  72  forms the bottom-right corner of device  10  and is formed from the third and fourth conductive sidewalls of peripheral conductive housing structures  12 W (e.g., in lower region  22  of device  10 ). Segment  74  forms the bottom-left corner of device  10  and is formed from the fourth and first conductive sidewalls of peripheral conductive housing structures  12 W (e.g., in lower region  22  of device  10 ). 
     Conductive support plate  58  may extend between opposing sidewalls of peripheral conductive housing structures  12 W. For example, conductive support plate  58  may extend from segment  76  to segment  70  of peripheral conductive housing structures  12 W (e.g., across the width of device  10 , parallel to the X-axis). Conductive support plate  58  may be welded or otherwise affixed to segments  76  and  70 . In another suitable arrangement, conductive support plate  58 , segment  76 , and segment  70  may be formed from a single, integral (continuous) piece of machined metal (e.g., in a unibody configuration). 
     As shown in  FIG.  5   , device  10  may include multiple slots  60  ( FIG.  4   ) such as an upper slot  60 U in upper region  20  and a lower slot  60 L in lower region  22 . The lower edge of upper slot  60 U may be defined by upper edge  54 U of conductive support plate  58  (e.g., an edge of conductive support plate  58  such as edge  54  of  FIG.  4   ). The upper edge of upper slot  60 U may be defined by segments  66  and  68  (e.g., upper slot  60 U may be interposed between conductive support plate  58  and segments  66  and  68  of peripheral conductive housing structures  12 W). The upper edge of lower slot  60 L may be defined by lower edge  54 L of conductive support plate  58  (e.g., an edge of conductive support plate  58  such as edge  54  of  FIG.  4   ). The lower edge of lower slot  60 L may be defined by segments  74  and  72  (e.g., lower slot  60 L may be interposed between conductive support plate  58  and segments  74  and  72  of peripheral conductive housing structures  12 W). 
     Upper slot  60 U may have an elongated shape extending from a first end at gap  18 - 2  to an opposing second end at gap  18 - 3  (e.g., upper slot  60 U may span the width of device  10 ). Similarly, lower slot  60 L may have an elongated shape extending from a first end at gap  18 - 6  to an opposing second end at gap  18 - 4  (e.g., lower slot  60 L may span the width of device  10 ). Slots  60 U and  60 L may be filled with air, plastic, glass, sapphire, epoxy, ceramic, or other dielectric material. Upper slot  60 U may be continuous with gaps  18 - 1 ,  18 - 2 , and  18 - 3  in peripheral conductive housing structures  12 W if desired (e.g., a single piece of dielectric material may be used to fill both upper slot  60 U and gaps  18 - 1 ,  18 - 2 , and  18 - 3 ). Similarly, lower slot  60 L may be continuous with gaps  18 - 6 ,  18 - 5 , and  18 - 4  if desired (e.g., a single piece of dielectric material may be used to fill both lower slot  60 L and gaps  18 - 6 ,  18 - 5 , and  18 - 4 ). 
     Conductive support plate  58 , segment  66 , segment  68 , and portions of upper slot  60 U may be used in forming multiple antennas  40  in upper region  20  of device  10  (sometimes referred to herein as upper antennas). Conductive support plate  58 , portions of lower slot  60 L, segment  74 , and segment  72  may be used in forming multiple antennas  40  in lower region  22  of device  10  (sometimes referred to herein as lower antennas). If desired, one or more phased antenna arrays for conveying millimeter and centimeter wave signals may at least partially overlap upper slot  60 L, conductive support plate  58 , and/or lower slot  60 L (not shown in  FIG.  5    for the sake of clarity). The phased antenna arrays may radiate through display cover layer  64  of  FIG.  4   , through dielectric cover layer  56  of  FIG.  4   , and/or through one or more apertures in peripheral conductive housing structures  12 W. 
       FIG.  6    is diagram showing how device  10  may include multiple antennas  40  in upper region  20  and lower region  22 . As shown in  FIG.  6   , device  10  may include four antennas  40  in upper region  20  such as antennas  40 - 2 ,  40 - 4 ,  40 - 8 , and  40 - 6 . Device  10  may also include five antennas  40  in lower region  22  such as antennas  40 - 1 ,  40 - 3 ,  40 - 5 ,  40 - 7 , and  40 - 9 . Each antenna may include a corresponding antenna feed  50  (e.g., antenna  40 - 1  may have antenna feed  50 - 1 , antenna  40 - 2  may have antenna feed  50 - 2 , antenna  40 - 3  may have antenna feed  50 - 3 , etc.). This example is merely illustrative and, in general, device  10  may include any desired number of antennas  40 . 
     The volume of antenna  40 - 6  may at least partially overlap the volume of antenna  40 - 2  and/or antenna  40 - 8  if desired. The volume of antenna  40 - 8  may at least partially overlap the volume of antenna  40 - 2  and/or antenna  40 - 6  if desired. In another suitable arrangement, antenna  40 - 8  may be omitted and antenna  40 - 6  may cover the frequencies that are otherwise covered by antenna  40 - 8 . The volume of antenna  40 - 5  may at least partially overlap the volume of antennas  40 - 1  and/or  40 - 3  if desired. Antennas  40 - 9 ,  40 - 3 ,  40 - 1 ,  40 - 7 ,  40 - 4 ,  40 - 2 , and optionally antennas  40 - 8  and  40 - 6  may each be formed from portions of peripheral conductive housing structures  12 W and conductive support plate  58  ( FIG.  5   ). 
     As shown in  FIG.  6   , the wireless circuitry in device  10  may include one or more input-output ports such as port  82  for interfacing with digital data circuits in storage and processing circuitry (e.g., control circuitry  38  of  FIG.  2   ). Wireless circuitry  34  may include baseband circuitry such as baseband (BB) processor  80  coupled between port  82  and radio-frequency transceiver (TX/RX) circuitry  36 . Port  82  may receive digital data (e.g., uplink data) from the control circuitry that is to be transmitted by radio-frequency transceiver circuitry  36 . Incoming data (e.g., downlink data) that has been received by radio-frequency transceiver circuitry  36  and baseband processor  80  may be supplied to the control circuitry via port  82 . 
     Radio-frequency transceiver circuitry  36  may include multiple transceiver ports  84  that are each coupled to a respective transmission line path  42  (e.g., a first transmission line path  42 - 1 , a second transmission line path  42 - 2 , a third transmission line path  42 - 3 , etc.). Transmission line path  42 - 1  may couple a first transceiver port  84  of radio-frequency transceiver circuitry  36  to the antenna feed  50 - 1  of antenna  40 - 1 . Transmission line path  42 - 2  may couple a second transceiver port  84  to the antenna feed  50 - 2  of antenna  40 - 2 . Similarly, transmission line paths  42 - 3 ,  42 - 4 ,  42 - 5 ,  42 - 6 ,  42 - 7 ,  42 - 8 , and  42 - 9  may each couple a respective transceiver port  84  to antenna feed  50 - 3  of antenna  40 - 3 , antenna feed  50 - 4  of antenna  40 - 4 , antenna feed  50 - 5  of antenna  40 - 5 , antenna feed  50 - 6  of antenna  40 - 6 , antenna feed  50 - 7  of antenna  40 - 7 , antenna feed  50 - 8  of antenna  40 - 8 , and antenna feed  50 - 9  of antenna  40 - 9 , respectively. 
     Radio-frequency front end circuits  78  may be interposed on each transmission line path  42  (e.g., a first front end circuit  78 - 1  may be interposed on transmission line path  42 - 1 , a second front end circuit  78 - 2  may be interposed on transmission line path  42 - 2 , a third front end circuit  78 - 3  may be interposed on transmission line path  42 - 3 , etc.). Front end circuits  78  may each include switching circuitry, filter circuitry (e.g., duplexer and/or diplexer circuitry, notch filter circuitry, low pass filter circuitry, high pass filter circuitry, bandpass filter circuitry, etc.), impedance matching circuitry for matching the impedance of transmission line path  42  to the corresponding antenna  40 , networks of active and/or passive components such as antenna tuning components, radio-frequency coupler circuitry for gathering antenna impedance measurements, or any other desired radio-frequency circuitry. If desired, front end circuits  78  may include switching circuitry that is configured to selectively couple antennas  40 - 1  through  40 - 9  to different respective transceiver ports  84  (e.g., so that each antenna can handle communications for different transceiver ports  84  over time based on the state of the switching circuits in front end circuits  78 ). If desired, front end circuits  78  may include filtering circuitry (e.g., duplexers and/or diplexers) that allow the corresponding antenna to transmit and receive radio-frequency signals in one or more frequency bands at the same time (e.g., using a frequency domain duplexing (FDD) scheme). In general, any desired combination of antennas may transmit and/or receive radio-frequency signals at a given time. 
     Amplifier circuitry such as one or more power amplifiers may be interposed on transmission line paths  42  (e.g., within front end circuits  78  or elsewhere) and/or may be formed within radio-frequency transceiver circuitry  36  for amplifying radio-frequency signals output by radio-frequency transceiver circuitry  36  prior to transmission over antennas  40 . Amplifier circuitry such as one or more low noise amplifiers may be interposed on transmission line paths  42  (e.g., within front end circuits  78  or elsewhere) and/or may be formed within radio-frequency transceiver circuitry  36  for amplifying radio-frequency signals received by antennas  40  prior to conveying the received signals to radio-frequency transceiver circuitry  36 . In the example of  FIG.  3   , separate front end circuits  78  are interposed on each transmission line path  42 . This is merely illustrative. If desired, two or more transmission line paths  42  may share the same front end circuit  78 . 
     Radio-frequency transceiver circuitry  36  may, for example, include circuitry for converting baseband signals received from baseband processor  80  into corresponding radio-frequency signals. For example, radio-frequency transceiver circuitry  36  may include mixer circuitry for up-converting the baseband signals to radio-frequencies prior to transmission over antennas  40 . Radio-frequency transceiver circuitry  36  may include digital to analog converter (DAC) and/or analog to digital converter (ADC) circuitry for converting signals between digital and analog domains. Radio-frequency transceiver circuitry  36  may include circuitry for converting radio-frequency signals received from antennas  40  over transmission line paths  42  into corresponding baseband signals. For example, radio-frequency transceiver circuitry  36  may include mixer circuitry for down-converting the radio-frequency signals to baseband frequencies prior to conveying the baseband signals to baseband processor  80 . Baseband processor  80 , front end circuits  78 , and/or radio-frequency transceiver circuitry  36  may be formed on the same substrate, integrated circuit, integrated circuit package, or module, or two or more of these components may be formed on separate substrates, integrated circuits, integrated circuit packages, or modules. 
     If desired, each of the antennas  40 - 1  through  40 - 9  may handle radio-frequency communications in one or more frequency bands.  FIG.  7    shows a table  86  that illustrates how antennas  40 - 1  through  40 - 9  of  FIG.  6    may collectively cover each frequency band of operation for device  10 . 
     Column  88  of table  86  lists different frequency bands of operation for device  10 . Column  90  of table  86  lists exemplary frequency ranges corresponding to the frequency bands in column  88 . Columns  92  of table  86  list whether antennas  40 - 1  through  40 - 9  are configured to cover each of the frequency bands listed in column  88 . Frequency bands that are covered by two or more antennas may be covered using a multiple-input and multiple-output (MIMO) scheme if desired. 
     As shown by columns  88  and  90  of table  86 , antennas  40 - 1  through  40 - 9  may collectively cover the cellular low band (LB) (e.g., from 600 to 960 MHz), the L5 GPS band at 1176 MHz, the cellular low-midband (LMB) (e.g., from 1400 to 1550 MHz), the L1 GPS band at 1575 MHz, the cellular midband (MB) (e.g., from 1700 to 2200 MHz), the cellular high band (HB) (e.g., from 2300 to 2700 MHz), the 2.4 GHz WLAN and WPAN bands (e.g., from 2400 to 2480 MHz), the cellular ultra-high band (UHB) (e.g., from 3300 to 5000 MHz and including the 5G NR FR1 bands N77, N78, and/or N79), the 5 GHz WLAN band (e.g., from about 5180 to about 5825 MHz), and one or more UWB bands (e.g., bands from about 6250 to 8250 MHz such as a first UWB band at 6.5 GHz and a second UWB band at 8.0 GHz). 
     As shown by columns  92  of table  86 , antennas  40 - 1  and  40 - 2  may each cover the cellular low band and the cellular low-midband. Antenna  40 - 3  may cover the L5 GPS band. Antenna  40 - 2  may cover the L1 GPS band. Antennas  40 - 1 ,  40 - 2 ,  40 - 3 , and  40 - 4  may each cover the cellular midband and the cellular high band. Antennas  40 - 3  and  40 - 4  may each cover the 2.4 GHz WLAN and WPAN bands. Antennas  40 - 4 ,  40 - 7 ,  40 - 8 , and  40 - 9  (and optionally antenna  40 - 6 ) may each cover the cellular ultra-high band. Antennas  40 - 5  and  40 - 6  may each cover the 5 GHz WLAN band. If desired, antennas  40 - 5  and  40 - 6  may also cover LTE band B46 (e.g., from 5150 to 5925 MHz). 
     Antenna  40 - 6  or antenna  40 - 8  may cover the UWB band(s). In a first suitable arrangement that is sometimes described herein as an example, antenna  40 - 8  may be omitted and antenna  40 - 6  may cover the 5 GHz WLAN band, the UWB band(s), and the cellular ultra-high band. In a second suitable arrangement that is sometimes described herein as an example, antenna  40 - 6  may cover the 5 GHz WLAN band and the UWB band(s) without covering the cellular ultra-high band and antenna  40 - 8  may cover the cellular ultra-high band without covering the UWB band(s). In a third suitable arrangement that is sometimes described herein as an example, antenna  40 - 6  may cover the 5 GHz WLAN band without covering the UWB band(s) or the cellular ultra-high band and antenna  40 - 8  may cover the UWB band(s) and the cellular ultra-high band. If desired, the antennas that cover the UWB band(s) may convey radio-frequency signals in the UWB band(s) within the hemisphere over the front face of device  10  (e.g., display  14  of  FIG.  1   ) and/or within the hemisphere under the rear face of device  10 . While not illustrated in table  86 , portions of antennas  40 - 2  and  40 - 4  may also be used to form a loop antenna resonating element for an NFC antenna that radiates in an NFC band. 
     In order to increase the overall data throughput of wireless circuitry  34  ( FIG.  2   ), multiple antennas may be operated using a multiple-input and multiple-output (MIMO) scheme. When operating using a MIMO scheme, two or more antennas on device  10  may be used to concurrently convey multiple independent streams of wireless data at the same frequencies. This may significantly increase the overall data throughput between device  10  and the external communications equipment relative to scenarios where only a single antenna is used. In general, the greater the number of antennas that are used for conveying wireless data under the MIMO scheme, the greater the overall throughput of wireless circuitry  34 . 
     If desired, the wireless circuitry may perform so-called two-stream (2X) MIMO operations (sometimes referred to herein as 2X MIMO communications or communications using a 2X MIMO scheme) in which two antennas  40  are used to convey two independent streams of radio-frequency signals at the same frequency. The frequency bands in table  86  that are covered by two or more antennas  40  may be used to perform 2X MIMO operations in those frequency bands, if desired. For example, the wireless circuitry may perform 2X MIMO operations in the cellular low band (e.g., using antennas  40 - 1  and  40 - 2 ), in the cellular low-midband (e.g., using antennas  40 - 1  and  40 - 2 ), in the cellular midband (e.g., using any desired pair of antennas  40 - 1  through  40 - 4 ), in the cellular high band (e.g., using any desired pair of antennas  40 - 1  through  40 - 4 ), in the 2.4 GHz WLAN band (e.g., using antennas  40 - 3  and  40 - 4 ), in the cellular ultra-high band (e.g., using any pair of antennas  40 - 4 ,  40 - 6 ,  40 - 7 ,  40 - 8 , and  40 - 9 ), and/or in the 5 GHz WLAN band (e.g., using antennas  40 - 5  and  40 - 6 ). 
     If desired, the wireless circuitry may perform so-called four-stream (4X) MIMO operations (sometimes referred to herein as 4X MIMO communications or communications using a 4X MIMO scheme) in which four antennas  40  are used to convey four independent streams of radio-frequency signals at the same frequency. The frequency bands in table  86  that are covered by four or more antennas  40  may be used to perform 4X MIMO operations in those frequency bands, if desired. For example, the wireless circuitry may perform 4X MIMO operations in the cellular midband (e.g., using antennas  40 - 1  through  40 - 4 ), the cellular high band (e.g., using antennas  40 - 1  through  40 - 4 ), and/or in the cellular ultra-high band (e.g., using four of antennas  40 - 4 ,  40 - 6 ,  40 - 7 ,  40 - 8 , and  40 - 9 ). Performing 4X MIMO operations may support higher overall data throughput than 2X MIMO operations because 4X MIMO operations involve four independent wireless data streams whereas 2X MIMO operations involve only two independent wireless data streams. Carrier aggregation schemes may also be used in performing wireless operations with antennas  40 - 1  through  40 - 9 . 
     In this way, each of the antennas may collectively cover each of the frequency bands shown in table  86  with satisfactory antenna efficiency and maximal data throughput. The example of  FIG.  7    is merely illustrative. In general, device  10  may include any desired number of antennas for covering any desired number of frequency bands at any desired frequencies. 
     If care is not taken, due to close physical proximity, it can be difficult for antennas  40 - 3 ,  40 - 5 , and  40 - 9  in the bottom-left corner of device  10  ( FIG.  6   ) to each convey radio-frequency signals in the corresponding frequency bands shown in columns  92  of  FIG.  7    with satisfactory antenna efficiency.  FIG.  8    is a top interior view showing how antennas  40 - 3 ,  40 - 5 , and  40 - 9  may be formed within device  10  in a manner such that the antennas each cover the corresponding frequency bands with satisfactory antenna efficiency. 
     As shown in  FIG.  8   , at least segment  76  of peripheral conductive housing structures  12 W and conductive support plate  58  may form part of the antenna ground for antennas  40 - 3 ,  40 - 5 , and  40 - 9  in lower region  22  of device  10  (e.g., in the bottom-left corner of device  10 ). Additional conductive components such as conductive housing structures, conductive structures from electronic components, printed circuit board traces, strips of conductor such as strips of wire or metal foil, conductive display components, and/or other conductive structures may also form part of the antenna ground. 
     Antenna  40 - 9  may be an open slot antenna having an open slot antenna resonating element formed from extended portion  96  of lower slot  60 L (e.g., an open slot antenna resonating element having edges defined by conductive support plate  58 , segment  76 , and/or other portions of the antenna ground and having an open end at gap  18 - 6 ). Extended portion  96  of lower slot  60 L may extend between segment  76  and conductive support plate  58 , along a longitudinal axis in the +Y direction, from a first end of lower slot  60 L at gap  18 - 6 . For example, extended portion  96  of lower slot  60 L may have a closed end  98  that extends by a non-zero distance beyond end  100  of segment  76  (e.g., the end of segment  76  at gap  18 - 6 ). While extended portion  96  of lower slot  60 L is continuous with lower slot  60 L, extended portion  96  may sometimes be referred to herein as slot  96  (e.g., an open slot extending from the end of lower slot  60 L at gap  18 - 6 ). 
     Antenna  40 - 9  may be fed using antenna feed  50 - 9 . Antenna feed  50 - 9  may be coupled across extended portion  96  of lower slot  60 L. For example, antenna feed  50 - 9  may have a positive antenna feed terminal  52 - 9  coupled to segment  76  (e.g., at or adjacent end  100 ) and may have a ground antenna feed terminal  44 - 9  coupled to conductive support plate  58 . Antenna feed  50 - 9  may be coupled to a corresponding port  84  of transceiver circuitry  36  ( FIG.  6   ) over transmission line path  42 - 9 . Transmission line path  42 - 9  may include a signal conductor  46 - 9  coupled to positive antenna feed terminal  52 - 9  and a ground conductor  48 - 9  coupled to ground antenna feed terminal  44 - 9 . 
     Transmission line path  42 - 9  and antenna feed  50 - 9  may convey radio-frequency signals in the cellular ultra-high band. Extended portion  96  of lower slot  60 L may resonate in the cellular ultra-high band. Corresponding antenna currents for antenna  40 - 9  (e.g., currents in the cellular ultra-high band) may flow around the perimeter of extended portion  96  of lower slot  60 L, as shown by arrow  101 . 
     If desired, front end circuitry  102  for antenna  40 - 9  may be interposed on transmission line path  42 - 9 . Front end circuitry  102  may form a part of front-end circuit  78 - 9  of  FIG.  6   , for example. Front end circuitry  102  may include one or more antenna tuning components (e.g., components having fixed and/or adjustable inductors, capacitors, resistors, filters, and/or switches coupled together in any desired arrangement), impedance matching circuitry, switching circuitry, and/or any other desired circuitry for controlling the radio-frequency operation/performance of antenna  40 - 9 . One or more antenna tuning components may additionally or alternatively be coupled across extended portion  96  of lower slot  60 L if desired. The frequency response of antenna  40 - 9  may be determined by the length of the perimeter of extended portion  96  of lower slot  60 L, one or more harmonic modes of extended portion  96 , contribution from one or more parasitic elements, antenna tuning components coupled across extended portion  96  of lower slot  60 L, and/or front end circuitry  102 , for example. 
     As shown in  FIG.  8   , antenna  40 - 3  may have an antenna resonating element arm (e.g., an inverted-F antenna resonating element arm) formed from segment  74  of peripheral conductive housing structures  12 W. Antenna  40 - 3  may be fed using antenna feed  50 - 3 . Antenna feed  50 - 3  may be coupled across lower slot  60 L. For example, antenna feed  50 - 3  may have a positive antenna feed terminal  52 - 3  coupled to segment  74  and may have a ground antenna feed terminal  44 - 3  coupled to conductive support plate  58 . Antenna feed  50 - 3  may be coupled to a corresponding port  84  of transceiver circuitry  36  ( FIG.  6   ) over transmission line path  42 - 3 . Transmission line path  42 - 3  may include a signal conductor  46 - 3  coupled to positive antenna feed terminal  52 - 3  and a ground conductor  48 - 3  coupled to ground antenna feed terminal  44 - 3 . 
     Transmission line path  42 - 3 , antenna feed  50 - 3 , and antenna  40 - 3  may convey radio-frequency signals in the L5 GPS band, the cellular midband, the cellular high band, and the 2.4 GHz WLAN and WPAN band. Corresponding antenna currents for antenna  40 - 3  (e.g., currents in the L5 GPS band, the cellular midband, the cellular high band, and the 2.4 GHz WLAN and WPAN band) may flow along segment  74  and conductive support plate  58  (e.g., at lower edge  54 L). 
     If desired, antenna  40 - 3  may include one or more return paths coupled between segment  74  and the antenna ground such as a return path formed by antenna tuning component  120 . Antenna tuning component  120  may have a first terminal  118  coupled to conductive support plate  58  (e.g., at lower edge  54 L) and a second terminal  122  coupled to segment  74 . Terminal  122  may be interposed on segment  74  between positive antenna feed terminal  52 - 3  and gap  18 - 5 . Antenna tuning component  120  may include any desired capacitive, resistive, inductive, and/or switching components arranged in any desired manner between terminals  118  and  122 . In another suitable arrangement, antenna tuning component  120  may form a short circuit path to ground from terminal  122  at the frequencies of operation of antenna  40 - 3 . 
     If desired, front end circuitry  104  for antenna  40 - 3  may be interposed on transmission line path  42 - 3 . Front end circuitry  104  may form a part of front-end circuit  78 - 3  of  FIG.  6   , for example. Front end circuitry  104  may include one or more antenna tuning components (e.g., components having fixed and/or adjustable inductors, capacitors, resistors, filters, and/or switches coupled together in any desired arrangement), impedance matching circuitry, switching circuitry, and/or any other desired circuitry for controlling the radio-frequency operation/performance of antenna  40 - 3 . The frequency response of antenna  40 - 3  may be determined by the length of segment  74  (e.g., the length of segment  74  extending from one or both sides of positive antenna feed terminal  52 - 3 ), one or more harmonic modes of segment  74  and/or lower slot  60 L, front end circuitry  104 , and/or antenna tuning component  120 , for example. If desired, moving positive antenna feed terminal  52 - 3  towards gap  18 - 6  and moving terminal  122  towards gap  18 - 5  may serve to increase the high band frequency response of antenna  40 - 3 . 
     Antenna  40 - 5  may have an antenna resonating element arm  94  formed from conductive traces on a flexible printed circuit or another substrate (not shown in  FIG.  8    for the sake of clarity). Antenna resonating element arm  94  may at least partially (e.g., completely) overlap lower slot  60 L. Antenna  40 - 5  may be fed using antenna feed  50 - 5 . Antenna feed  50 - 5  may be coupled across lower slot  60 L. For example, antenna feed  50 - 5  may have a positive antenna feed terminal  52 - 5  coupled to antenna resonating element arm  94  and may have a ground antenna feed terminal  44 - 5  coupled to conductive support plate  58 . Antenna feed  50 - 5  may be coupled to a corresponding port  84  of transceiver circuitry  36  ( FIG.  6   ) over transmission line path  42 - 5 . Transmission line path  42 - 5  may include a signal conductor  46 - 5  coupled to positive antenna feed terminal  52 - 5  and a ground conductor  48 - 5  coupled to ground antenna feed terminal  44 - 5 . 
     Transmission line path  42 - 5 , antenna feed  50 - 5 , and antenna  40 - 5  may convey radio-frequency signals in the 5 GHz WLAN band. Corresponding antenna currents for antenna  40 - 5  (e.g., currents in the 5 GHz WLAN band) may flow along segment  74  and conductive support plate  58  (e.g., at lower edge  54 L). If desired, antenna  40 - 5  may include one or more return paths coupled between antenna resonating element arm  94  and the antenna ground such as a return path formed by antenna tuning component  126 . Antenna tuning component  126  may have a first terminal  128  coupled to conductive support plate  58  (e.g., at lower edge  54 L) and a second terminal  124  coupled to antenna resonating element arm  94 . In one suitable arrangement, terminal  128  is interposed on lower edge  54 L between ground antenna feed terminal  44 - 5  and ground antenna feed terminal  44 - 3 , whereas ground antenna feed terminal  44 - 3  is interposed between terminals  128  and  118 . If desired, two or more of ground antenna feed terminal  44 - 5 , terminal  128 , ground antenna feed terminal  44 - 3 , and terminal  118  may be coupled to the same location (point) on conductive support plate  58  (e.g., using the same grounding screw). 
     If desired, front end circuitry  106  for antenna  40 - 5  may be interposed on transmission line path  42 - 5 . Front end circuitry  106  may form a part of front-end circuit  78 - 5  of  FIG.  6   , for example. Front end circuitry  106  may include one or more antenna tuning components (e.g., components having fixed and/or adjustable inductors, capacitors, resistors, filters, and/or switches coupled together in any desired arrangement), impedance matching circuitry, switching circuitry, and/or any other desired circuitry for controlling the radio-frequency operation/performance of antenna  40 - 5 . The frequency response of antenna  40 - 5  may be determined by the length of antenna resonating element arm  94 , one or more harmonic modes of antenna resonating arm  94 , front end circuitry  106 , and/or antenna tuning component  126 , for example. 
     If desired, extended portion  96  of lower slot  60 L may also contribute to the frequency response of antenna  40 - 3 . Antenna  40 - 3  may include a conductive path such as conductive path  108  that couples positive antenna feed terminal  52 - 3  to positive antenna feed terminal  52 - 9 . Antenna feed  50 - 9  and antenna  40 - 9  may be inactive (e.g., switched off) while antenna  40 - 3  is operating or may, if desired, remain active while antenna  40 - 3  is operating (e.g., antenna feed  50 - 9  and transmission line path  42 - 9  may continue to convey radio-frequency signals in the cellular ultra-high band while antenna  40 - 3  receives radio-frequency signals in the L5 GPS band). 
     In practice, extended portion  96  of lower slot  60 L may be too short on its own for antenna  40 - 3  to cover lower frequencies such as frequencies in the L5 GPS band. An antenna tuning component such as antenna tuning component  110  may be interposed on conductive path  108  to help recover a frequency response for antenna  40 - 3  in the L5 GPS band. Antenna tuning component  110  may include any desired resistive, inductive, capacitive, and/or switching components arranged in any desired manner In one suitable arrangement, antenna tuning component  110  may include one or more capacitors that are turned on to increase the capacitance of antenna tuning component  110  when antenna  40 - 3  is receiving radio-frequency signals in the L5 GPS band (e.g., the increased capacitance on conductive path  108  may serve to effectively increase the length of extended portion  96  of lower slot  60 L, thereby pulling the response of antenna  40 - 3  to lower frequencies that include the L5 GPS band). The capacitors may, if desired, be turned off to decrease the capacitance of antenna tuning component  110  when antenna  40 - 3  is not conveying radio-frequency signals in the L5 GPS band. The capacitors may also, if desired, serve to increase the cellular high band response of antenna  40 - 3 . 
     In order to recover a frequency response of antenna  40 - 3  in both the cellular midband and the cellular high band (e.g., so antenna  40 - 3  can concurrently convey radio-frequency signals in both the cellular midband and the cellular high band), an additional conductive path such as conductive path  114  may couple conductive path  108  to conductive support plate  58 . For example, as shown in  FIG.  8   , conductive path  114  may couple node  112  on conductive path  108  to terminal  118  on conductive support plate  58 . Node  112  may be interposed on conductive path  108  between antenna tuning component  110  and positive antenna feed terminal  52 - 3 , as an example. In another suitable arrangement, conductive path  114  may be coupled to a point on conductive support plate  58  other than terminal  118 . 
     An antenna tuning component such as antenna tuning component  116  may be interposed on conductive path  114 . Antenna tuning component  116  may include any desired resistive, inductive, capacitive, and/or switching components arranged in any desired manner. In general, the state of antenna tuning component  116 , antenna tuning component  110 , and/or antenna tuning components in front end circuit  104  may be adjusted to allow antenna  40 - 3  to cover a selected one or both of the cellular midband and the cellular high band at any given time. The example of  FIG.  8    is merely illustrative. Lower slot  60 L, segment  74 , segment  72 , and antenna resonating element arm  94  may have other shapes (e.g., shapes having any desired number of straight and/or curved portions and any desired number of straight and/or curved edges). 
       FIG.  9    is a plot of antenna efficiency as a function of frequency for antenna  40 - 3 . As shown in  FIG.  9   , dashed curve  132  plots the frequency response of antenna  40 - 3  when antenna tuning component  116  is placed in a first state in which antenna tuning component  116  forms an open circuit between node  112  and terminal  118  ( FIG.  8   ) and in which antenna tuning component  110  is placed in a first state in which antenna tuning component  110  exhibits a given capacitance (e.g., 1 pF). As shown by curve  132 , when configured in this way, antenna  40 - 3  may exhibit a response peak in the cellular high band (HB) and the 2.4 GHz WLAN and WPAN band. This response peak may also cover higher frequencies of the cellular midband (MB). However, when configured in this way, antenna  40 - 3  may exhibit insufficient efficiency at lower frequencies in the cellular midband or the L5 GPS band. 
     Curve  130  plots the frequency response of antenna  40 - 3  when antenna tuning component  116  is placed in the first state (e.g., where antenna tuning component  116  forms an open circuit between node  112  and terminal  118 ) and when antenna tuning component  110  is placed in a second state in which antenna tuning component  110  exhibits a given inductance (e.g., 1.8 nH). As shown by curve  130 , when configured in this way, antenna  40 - 3  may exhibit response peaks in the cellular midband and the cellular high band. These response peaks may also cover the 2.4 GHz WLAN and WPAN band. While this state may involve less cellular high band efficiency than the state associated with curve  132 , antenna  40 - 3  may still convey radio-frequency signals in the cellular high band in this state, if desired (e.g., the state associated with curve  130  may be used when midband communications is prioritized over high band communications). However, when configured in this way, antenna  40 - 3  may still exhibit insufficient efficiency at lower frequencies in the cellular midband or the L5 GPS band. 
     Curve  134  plots the frequency response of antenna  40 - 3  when antenna tuning component  116  is placed in a second state (e.g., where antenna tuning component  116  forms a short circuit path between node  112  and terminal  118 ) and when antenna tuning component  110  is placed in a third state (e.g., where antenna tuning component  110  forms a short circuit impedance between node  112  and positive antenna feed terminal  52 - 9 ). As shown by curve  130 , when configured in this way, antenna  40 - 3  may exhibit response peaks in the L 5  GPS band, in the cellular high band, and the 2.4 GHz WLAN and WPAN band. These response peaks may also cover the cellular midband. While this state may involve less cellular midband efficiency than the state associated with curve  130 , antenna  40 - 3  may still convey radio-frequency signals in the cellular midband in this state, if desired. This state may allow antenna  40 - 3  to concurrently cover the L 5  GPS band in addition to the cellular midband, the cellular high band, and the 2.4 GHz WLAN and WPAN band. 
     The example of  FIG.  9    is merely illustrative. Curves  130 ,  132 , and  134  may have other shapes in practice. Antenna  40 - 3  may have any desired number of response peaks at any desired frequencies. In another suitable arrangement, conductive path  114  and antenna tuning component  116  ( FIG.  8   ) may be omitted from antenna  40 - 3 . In this arrangement, the impedance of antenna tuning component  110  may be selected (e.g., by selectively coupling a desired inductance and/or capacitance between node  112  and positive antenna feed terminal  52 - 9 ) so that antenna  40 - 3  can concurrently convey radio-frequency signals in each of the L5 GPS band, the cellular midband, the 2.4 GHz WLAN and WPAN band, and the cellular high band. 
     If desired, the state of one or more antenna tuning components in front end circuitry  104  ( FIG.  8   ) may also be used to select a desired frequency response of antenna  40 - 3 . As an example, front end circuitry  104  may include a series single-pole-four-throw (SP4T) switch that couples a selected one of three series inductors or a shunt resistor to antenna feed  40 - 3 . In this scenario, antenna  40 - 3  may have a first state in which antenna tuning component  110  has a first inductance (e.g., 56 nH), antenna tuning component  116  forms a short circuit impedance between node  112  and terminal  118 , and the SP4T has a first configuration. In this first state, antenna  40 - 3  may convey radio-frequency signals in the cellular high band, the 2.4 GHz WLAN and WPAN band, and the L5 GPS band. Antenna  40 - 4  may also have a second state in which antenna tuning component  110  has a second inductance (e.g., 3.4 nH), antenna tuning component  116  forms a short circuit impedance between node  112  and terminal  118 , and the SP4T has a second configuration. In this second state, antenna  40 - 3  may convey radio-frequency signals in the cellular midband. Antenna  40 - 4  may also have a third state in which antenna tuning component  110  has a third inductance (e.g., 1.8 nH), antenna tuning component  116  forms an open circuit impedance between node  112  and terminal  118 , and the SP4T has a third configuration. In this third state, antenna  40 - 3  may convey radio-frequency signals in the cellular midband. These examples are merely illustrative and, in general, antenna  40 - 3  may have any desired tuning states. 
     If desired, radio-frequency components for supporting antenna  40 - 9 , antenna  40 - 3 , and antenna  40 - 5  may be mounted to the same flexible printed circuit in device  10 .  FIG.  10    is a perspective view of an illustrative flexible printed circuit that includes radio-frequency components for supporting antennas  40 - 9 ,  40 - 3 , and  40 - 5 . 
     As shown in  FIG.  10   , a flexible printed circuit such as flexible printed circuit  136  may be provided in device  10 . Flexible printed circuit  136  may have a main portion  156 . A dock port such as dock  154  may be mounted to main portion  156 . Dock  154  may be aligned with an opening in peripheral conductive housing structures  12 W ( FIG.  1   ). Dock  154  may receive wired power and/or may convey data with external equipment, for example. Main portion  156  may therefore sometimes be referred to herein as dock portion  156  and flexible printed circuit  136  may sometimes be referred to herein as dock flex  136 . 
     Dock flex  136  may have first and second flexible printed circuit tails such as tails  138  and  140  that extend from a first side of dock portion  156  (e.g., in the +Y or “northern” direction). Dock flex  136  may have a third flexible printed circuit tail such as tail  166  extending from a second side of dock portion  156  (e.g., in the −Y or “southern” direction). When mounted within device  10 , tails  138  and  140  may extend towards upper region  20  of device  10  ( FIG.  1   ), whereas tail  166  extends towards segment  74  of peripheral conductive housing structures  12 W ( FIG.  8   ). 
     A radio-frequency connector such as radio-frequency connector  142  (e.g., a radio-frequency board-to-board connector) may be mounted to the end of tail  138 . Transmission line paths  42 - 9 ,  42 - 3 , and  42 - 5  for antennas  40 - 9 ,  40 - 3 , and  40 - 5  ( FIG.  8   ) may run from dock portion  156  to radio-frequency connector  142  through tail  138 . The transmission lines for antennas  40 - 1  and  40 - 7  ( FIG.  6   ) may also run through tail  138  and dock portion  156 . Radio-frequency connector  142  may be coupled to a main logic board used to mount transceiver circuitry  36  ( FIG.  6   ), for example. 
     A board-to-board connector such as board-to-board connector  144  may be mounted to tail  140 . Board-to-board connector  144  may be coupled to control circuitry  16  ( FIG.  1   ) and/or other components in device  10 . Conductive paths such as control paths, power lines, data paths, and/or any other desired conductive paths may be coupled to board-to-board connector  144  through tail  140 . The conductive paths may include, for example, control paths for controlling the operation of front end circuitry  102 ,  104 , and  106  ( FIG.  8   ), data and power lines coupled to dock  154 , etc. 
     If desired, tails  138  and  140  may be created by cutting a sheet of flexible printed circuit material used to form dock flex  136 . Tail  138  may abut tail  140  along its length to maximize the space on dock flex  136  for transmission lines and conductive paths. Dock flex  136  may include a joint opening  148  at the base of tails  138  and  140  (e.g., where tails  138  and  140  meet dock portion  156 ). Joint opening  148  may allow tails  138  and  140  to be folded with respect to dock portion  156  while maximizing the width of tails  138  and  140 , for example. One or both of tails  138  and  140  may be grounded at one or more locations along their respective lengths, if desired. 
     As shown in  FIG.  10   , a conductive feed clip such as feed clip  192  may be mounted to dock portion  156  of dock flex  136 . When mounted within device  10 , feed clip  192  may be coupled to segment  76  of peripheral conductive housing structures  12 W to form positive antenna feed terminal  52 - 9  for antenna  40 - 9  ( FIG.  8   ) (e.g., using a conductive screw inserted through a hole in feed clip  192  and attached to a threaded screw boss in the peripheral conductive housing structures). Dock portion  156  may also include an opening such as opening  164 . A conductive grounding clip such as grounding clip  160  may overlap opening  164 . Grounding clip  160  may be used to form ground antenna feed terminal  44 - 9  of  FIG.  8    (e.g., using a conductive screw that couples grounding clip  160  to conductive support plate  58  through opening  164 ). 
     Front end circuitry  102  for antenna  40 - 9  ( FIG.  8   ) may also be mounted to dock portion  156  of dock flex  136  (e.g., transmission line path  42 - 9  of  FIG.  8    may extend from radio-frequency connector  142 , through tail  138  and dock portion  156  to front end circuitry  102 ). An electromagnetic shielding layer such as engine cover  162  may cover front end circuitry  102  on dock portion  156 . Engine cover  162  may include ferrite and/or conductive materials (e.g., a plastic sheet with a metal cover layer) that help to shield antennas  40 - 9 ,  40 - 5 , and/or  40 - 3  from other components in device  10 . Engine cover  162  may, for example, serve to increase the antenna efficiency of at least antenna  40 - 5  (e.g., by increasing electromagnetic isolation between antenna  40 - 5  and other components in device  10  such as display  14  of  FIG.  1   ). 
     Dock flex  136  may include a first portion (region)  168  coupled to (extending from) one side of tail  166 . Dock flex  136  may also include a second portion (region)  170  at the end of tail  166  (e.g., tail  166  may couple second portion  170  to dock portion  156  of dock flex  136 ). Antenna resonating element arm  94  for antenna  40 - 5  may be formed from conductive traces on first portion  168 , for example. Front end circuitry  106  for antenna  40 - 5  may also be mounted (e.g., surface-mounted) to first portion  168  (e.g., transmission line path  42 - 5  of  FIG.  8    may extend from radio-frequency connector  142 , through tail  138 , dock portion  156 , and tail  166  to antenna resonating element arm  94  through front end circuitry  106 ). A conductive grounding clip such as grounding clip  176  may be mounted to tail  166  at first portion  168 . Grounding clip  176  may be used to form ground antenna feed terminal  44 - 5  and/or terminal  128  of  FIG.  8    (e.g., using a conductive screw that couples grounding clip  176  to conductive support plate  58 ). 
     A dielectric substrate such as plastic support block  172  may be mounted to tail  166  at first portion  168 . Plastic support block  172  may be formed from injection molded plastic, as an example. If desired, grounding clip  176  may be molded within plastic support block  172 . Plastic support block  172  may be used to support the folding of tail  166  when mounting dock flex  136  into device  10 . 
     Front end circuitry  104  for antenna  40 - 3  ( FIG.  8   ) may be mounted (e.g., surface-mounted) to second portion  170  of dock flex  136 . A conductive grounding clip such as grounding clip  178  may be mounted to second portion  170  of dock flex  136 . Grounding clip  178  may be used to form ground antenna feed terminal  44 - 3  and/or terminal  118  of  FIG.  8    (e.g., using a conductive screw that couples grounding clip  178  to conductive support plate  58 ). Antenna tuning component  116  and/or antenna tuning component  110  of  FIG.  8    may also be mounted to second portion  170  of dock flex  136  if desired. 
     A conductive feed clip such as feed clip  190  may be mounted (e.g., surface-mounted) to second portion  170  of dock flex  136 . When mounted within device  10 , feed clip  190  may be coupled to segment  74  of peripheral conductive housing structures  12 W to form positive antenna feed terminal  52 - 3  for antenna  40 - 3  ( FIG.  8   ) (e.g., using a conductive screw inserted through a hole in feed clip  190  and attached to a threaded screw boss in the peripheral conductive housing structures). Transmission line path  42 - 3  of  FIG.  8    may, for example, extend from radio-frequency connector  142 , through tail  138 , dock portion  156 , tail  166 , and front end circuitry  104  to feed clip  190 . 
     A conductive bridging clip such as bridging clip  180  may be mounted (e.g., surface-mounted) to second portion  170  of dock flex  136 . When mounted within device  10 , bridging clip  180  may be coupled to feed clip  192  and segment  76  of peripheral conductive housing structures  12 W (e.g., at positive antenna feed terminal  52 - 9  of  FIG.  8   ). A conductive trace on second portion  170  of dock flex  136  may couple antenna tuning component  110  on second portion  170  between feed clip  192  and bridging clip  180 . In this way, feed clip  190 , the conductive trace, antenna tuning component  110 , and bridging clip  180  may form conductive path  108  of  FIG.  8    for coupling positive antenna feed terminal  52 - 3  of antenna  40 - 3  to positive antenna feed terminal  52 - 9  of antenna  40 - 9 . 
     In the example of  FIG.  10   , dock flex  136  is in a flat, unfolded state. If desired, dock flex  136  may be folded about one or more axes for mounting within device  10 . For example, tail  140  may be folded about axis  158 . Tail  138  may be folded about axes  150  and  152 . Tail  138  may also be folded, with respect to dock portion  156 , about axis  148 . Tail  166  may be folded about axis  174 .  FIG.  11    is a perspective view of dock flex  136  in one illustrative folded state. 
     As shown in  FIG.  11   , tail  138  may be folded upwards about axis  146  (e.g., at joint opening  148 ). Axis  146  may extend parallel to the Y-axis of  FIG.  11   , for example. Tail  138  may also be folded to the right about axis  150  and to the left about axis  152 . Axes  150  and  152  may extend parallel to the Z-axis of  FIG.  11   , for example. Folding (bending) tail  138  about axis  148  may allow tail  138  to extend along the periphery of a battery for device  10  (e.g., the vertical portion of tail  138  may be laterally interposed between the peripheral edge of the battery and segment  76  of peripheral conductive housing structures  12 W of  FIG.  5   ). 
     At the same time, tail  140  may extend under the bottom surface of the battery (e.g., tail  140  may be interposed between the battery and conductive support plate  58 ). Folding tail  138  about axes  150  and  152  may allow tail  138  to wrap around a logic board and/or SIM card tray for device  10 . Tail  140  may be folded about axis  158  (e.g., an axis extending parallel to the X-axis of  FIG.  11   ) to mount radio-frequency connector  142  to a corresponding radio-frequency connector on a logic board. Folding dock flex  136  in this way may allow antennas  40 - 3 ,  40 - 5 , and  40 - 9  to be fed while occupying a minimal volume in device  10 , thereby allowing as much space as possible for other components in device  10  (e.g., a larger battery than would otherwise fit within device  10 ). 
     As shown in  FIG.  11   , tail  166  may be folded about axis  174  and around plastic support block  172  (e.g., around the southern side of plastic support block  172  that faces the lower end of device  10 ). Axis  174  may extend parallel to the X-axis of  FIG.  11   , for example. The folded (bent) portion of tail  166  may be laterally interposed between plastic support block  172  and segment  74  of peripheral conductive housing structures  12 W ( FIG.  8   ). Similarly, plastic support block  172  may be laterally interposed between the folded portion of tail  166  and dock portion  156  of dock flex  136 . Folding tail  166  about the southern side of plastic support block  172  may serve to increase antenna efficiency for antenna  40 - 5  relative to scenarios where tail  166  is unfolded, for example. 
     Folding tail  166  about axis  174  may place second portion  170  of dock flex  136  over the top surface of plastic support block  172  (e.g., plastic support block  172  may be vertically interposed between first portion  168  and second portion  170  of dock flex  136  and second portion  170  may at least partially overlap first portion  168 ). This may also serve to place bridging clip  180  over feed clip  192  on dock portion  156 . If desired, the same conductive screw may be inserted into bridging clip  180  and feed clip  192  to couple the clips to segment  76  of peripheral conductive housing structures  12 W (e.g., to couple signal conductor  46 - 9  of transmission line path  42 - 9  to positive antenna feed terminal  52 - 9  via feed clip  192  and to couple positive antenna feed terminal  52 - 3  to positive antenna feed terminal  52 - 9  via bridging clip  180 , feed clip  190 , and conductive path  108  of  FIG.  8   ). 
     At the same time, when folded, grounding clip  178  on second portion  170  may be placed into contact with grounding clip  176 . The same conductive screw may be inserted into grounding clips  176  and  178  to short grounding clips  176  and  178  to the same point on conductive support plate  58  ( FIG.  8   ), for example. When folded, feed clip  190  may be oriented in a manner that allows feed clip  190  to be coupled (e.g., screwed into) segment  74  of peripheral conductive housing structures  12 W. 
     The example of  FIGS.  10  and  11    is merely illustrative. In general, dock flex  136  may have any desired shape with any desired number of tails. Dock flex  136  may be formed from a single flexible printed circuit or from multiple flexible printed circuits that are surface-mounted together.  FIG.  12    is a perspective view showing how second portion  170  of dock flex  136  may be secured to plastic support block  172  (e.g., in the folded configuration of  FIG.  11   ). 
     As shown in  FIG.  12   , front end circuitry  102  for antenna  40 - 9  may be mounted to dock portion  156  of dock flex  136 . Grounding clip  160  for antenna  40 - 9  may overlap opening  164  in dock portion  156  of dock flex  136 . Feed clip  192  may also be mounted to dock portion  156  of dock flex  136 . Tail  138  may be folded upwards and may extend away from dock portion  156  of dock flex  136 . 
     Tail  166  may be wrapped around plastic support block  172  to hold second portion  170  of dock flex  136  over first portion  168  of dock flex  136 . Conductive traces used to form antenna resonating element arm  94  may be printed onto first portion  168  of dock flex  136 . An optional stiffener layer such as stiffener  194  may be layered onto second portion  170  of dock flex  136 . When folded, front end circuitry  104  on second portion  170  may face front end circuitry  106  on first portion  168  of dock flex  136 . 
     Grounding clip  178  may be coupled to the top surface of plastic support block  172 . If desired, grounding clip  178  may be at least partially embedded (e.g., molded) within plastic support block  172 . Grounding clip  176  may also be at least partially embedded within plastic support block  172 . Grounding clip  178  may overlap and contact grounding clip  176 . The same conductive screw or pin may extend through grounding clips  176  and  178  to couple the grounding clips to conductive support plate  58  ( FIG.  8   ). 
     Plastic support block  172  may include an engagement structure such as snap hook clip  196 . Snap hook clip  196  may, for example, be formed from an extension or tab of plastic support block  172 . Grounding clip  178  may include engagement portion  198 . Engagement portion  198  may include an opening. Snap hook clip  196  may protrude through the opening in engagement portion  198  of grounding clip  178 . Snap hook clip  196  may hold (e.g., snap) engagement portion  198  onto plastic support block  172 , thereby holding second portion  170  in place over first portion  168  of dock flex  136 . This may, for example, ensure that the fold in tail  166  remains in place over time. 
     When second portion  170  of dock flex  136  is held in place by snap hook clip  196 , bridging clip  180  may be placed into contact with feed clip  192 . If desired, feed clip  192  may include an engagement structure such as tab  193 . Tab  193  may hold (e.g., snap) bridging clip  180  in place on feed clip  192 . The example of  FIG.  12    in which tab  193  extends downwards from the top edge of feed clip  192  is merely illustrative. In another suitable arrangement, tab  193  may extend upwards from the bottom edge of feed clip  192 . In this example, feed clip  192  may also include an opening that mates with an engagement feature on bridging clip  180 , if desired. 
     In the example of  FIG.  12   , snap hook clip  196  is formed on northern face  173  of plastic support block  172  and grounding clips  178  and  176  extend from eastern face  175  of plastic support block  172 . This is merely illustrative. In another suitable arrangement, snap hook clip  196  may be located on eastern face  175  of plastic support block  172 .  FIG.  13    is a perspective view showing how snap hook clip  196  may be located on eastern face  175  of plastic support block  172 .  FIG.  13    also shows one example of how dock flex  136  may be mounted to device  10 . In the example of  FIG.  13   , grounding clip  160 , front end circuitry  102 , and antenna resonating element arm  94  are not shown for the sake of clarity. 
     As shown in  FIG.  13   , snap hook clip  196  may be formed on eastern face  175  of plastic support block  172 . Grounding clips  178  and  176  may also extend from eastern face  175  of plastic support block  172 . Grounding clip  178  may include an opening. Snap hook clip  196  may protrude through the opening to hold (snap) second portion  170  of dock flex  136  in place on plastic support block  172 . Northern face  173  of plastic support block  172  may be free from conductive material in this example, if desired. 
     Dock flex  136  may be mounted to device  10 . For example, segment  76  of peripheral conductive housing structures  12 W may include an attachment structure such as threaded screw boss  200 . Bridging clip  180  and feed clip  192  may be placed over and onto screw boss  200 . A conductive screw (not shown) may be inserted into screw boss  200  through bridging clip  180  and feed clip  192 . The conductive screw may help to mechanically secure dock flex  136  to peripheral conductive housing structures  12 W and may form positive antenna feed terminal  52 - 9  of  FIG.  8   , for example. 
     While not shown in the perspective view of  FIG.  13   , feed clip  190  ( FIGS.  10  and  11   ) may also couple second portion  170  of dock flex  136  to a screw boss on segment  74  of peripheral conductive housing structures  12 W (e.g., for forming positive antenna feed terminal  52 - 3  of  FIG.  8   ). As shown in  FIG.  13   , conductive support plate  58  may include an attachment structure such as threaded screw boss  202 . Feed clips  176  and  178  may be placed over and onto screw boss  202 . A conductive screw (not shown) may be inserted into screw boss  202  through grounding clips  178  and  176 . The conductive screw may help to mechanically secure dock flex  136  to conductive support plate  58  and may form ground antenna feed terminal  44 - 5 , terminal  128 , ground antenna feed terminal  44 - 3 , and/or terminal  118  of  FIG.  8   , for example. 
     The example of  FIGS.  12  and  13    in which plastic support block  172  includes snap hook clip  196  is merely illustrative. In another suitable arrangement, engagement structures on grounding clips  178  and  176  may be used to hold folded tail  166  of dock flex  136  in place.  FIG.  14    is a perspective view showing how grounding clips  178  and  176  may include engagement structures for holding folded tail  166  of dock flex  136  in place. In the example of  FIG.  14   , plastic support block  172  is not shown for the sake of clarity. 
     As shown in  FIG.  14   , grounding clip  176  may include an engagement structure such as engagement structure  204  (e.g., an extension or tab portion of grounding clip  176 ). Grounding clip  178  may include an opening. Engagement structure  204  may be inserted into the opening in grounding clip  178  to hold (snap) second portion  170  of dock flex  136  in place over first portion  168  of dock flex  136 . The plastic support block may be molded (e.g., injection molded) over grounding clips  176  and  178  on tail  166  of dock flex  136 . If desired, engagement structure  204  may protrude from the plastic support block after molding. Engagement structure  204  and grounding clips  176  and  178  may be located at the eastern face of the plastic support block (e.g., eastern face  175  of  FIGS.  12  and  13   ). 
       FIG.  15    is a top interior view showing one example of how dock flex  136  may be screwed in place within device  10 . As shown in  FIG.  15   , tail  166  of dock flex  136  may be wrapped or folded around axis  174  to hold second portion  170  of dock flex  136  in place over antenna  40 - 5 . A conductive screw such as screw  210  may be inserted into grounding clips  176  and  178 . Screw  210  may be screwed into screw boss  202  on conductive support plate  58  ( FIG.  13   ) to help mechanically secure (affix) dock flex  136  to conductive support plate  58 . At the same time, screw  210  may electrically short grounding clips  176  and  178  to conductive support plate  58 . 
     A conductive screw such as screw  206  may be inserted into feed clip  190  for antenna  40 - 3 . Screw  206  may be screwed into a screw boss on segment  74  of peripheral conductive housing structures  12 W. Screw  206  may help to mechanically secure dock flex  136  to segment  74  of peripheral conductive housing structures  12 W. At the same time, screw  206  may electrically couple the signal conductor for antenna  40 - 3  (e.g., signal conductor  46 - 3  of transmission line path  42 - 3  of  FIG.  8   ) to positive antenna feed terminal  52 - 3  on segment  74  ( FIG.  8   ). 
     A conductive screw such as screw  214  may be inserted into feed clip  192  for antenna  40 - 9  and bridging clip  180  for antenna  40 - 3 . Screw  214  may be screwed into screw boss  200  on segment  76  of peripheral conductive housing structures  12 W ( FIG.  13   ). Screw  214  may help to mechanically secure dock flex  136  to segment  76  of peripheral conductive housing structures  12 W. At the same time, screw  214  may electrically couple the signal conductor for antenna  40 - 9  (e.g., signal conductor  46 - 9  of transmission line path  42 - 9  of  FIG.  8   ) to positive antenna feed terminal  52 - 9  on segment  76  ( FIG.  8   ). Screw  214  may also electrically couple positive antenna feed terminal  52 - 3  to positive antenna feed terminal  52 - 9  (e.g., via bridging clip  180  and conductive path  108  of  FIG.  8   ). 
     A conductive screw such as screw  212  may couple the ground conductor for antenna  40 - 9  (e.g., ground conductor  48 - 9  of transmission line path  42 - 9  of  FIG.  8   ) to conductive support plate  58 . A conductive screw such as screw  208  may couple antenna tuning component  120  of  FIG.  8    to segment  74  of peripheral conductive housing structures  12 W (e.g., at terminal  122 ). In another suitable arrangement, screw  208  may couple antenna tuning components  120  and  116  of  FIG.  8    to conductive support plate  58  (e.g., at terminal  118 ). In this arrangement, screw  208  may be used to form terminal  118 , whereas screw  210  is used to form terminal  128 , ground antenna feed terminal  44 - 3 , and/or ground antenna feed terminal  44 - 5  of  FIG.  8   , for example. 
     The example of  FIG.  15    is merely illustrative. If desired, device  10  may include conductive springs at one or more of the locations of screws  212 ,  210 , and  208 . The conductive springs may couple these locations to conductive structures in display  14  of  FIG.  1    (e.g., to extend the antenna ground at these locations to include conductive portions of display  14 , thereby optimizing antenna performance). Screws  212 ,  214 ,  206 ,  210 , and/or  208  of  FIG.  15    may be replaced with any other desired conductive interconnect structures if desired (e.g., solder, welds, conductive springs, conductive pins, conductive foam, conductive gaskets, conductive brackets, conductive traces, sheet metal members, conductive screws, combinations of these, etc.). 
     In the example of  FIG.  15   , the curved tail  166  of dock flex  136  may be located adjacent (e.g., between or at least partially between) screws  210  and  208 . This may serve to increase the antenna efficiency of antenna  40 - 3  relative to scenarios where the curved tail  166  of dock flex  136  is located between screws  206  and  208 , for example. This example is merely illustrative and, in another suitable arrangement, the curved tail  166  of dock flex  136  may be located (e.g., interposed) between screws  206  and  208 . In addition, folding dock flex  136  at tail  166  (e.g., from the southern direction) may, in general, serve to increase the overall antenna efficiency of antenna  40 - 5  by as much as 5-10 dB relative to scenarios where tail  166  is completely flat (e.g., as shown in  FIG.  10   ). In this way, antennas  40 - 5 ,  40 - 3 , and  40 - 9  may be configured to coexist within a very small volume at the bottom-left corner of device  10  while providing satisfactory radio-frequency performance in each of the frequency bands of operation of antennas  40 - 5 ,  40 - 3 , and  40 - 9 . 
     The foregoing is merely illustrative and various modifications can be made by those skilled in the art without departing from the scope and spirit of the described embodiments. The foregoing embodiments may be implemented individually or in any combination.

Metadata:
Filing Date: 20210405
Publication Date: 20240813
Grant Date: 20240813
Priority Date: 20200911
Inventors: IRCI, Erdinc
SQUIER, AARON H.
Zhang, Daisong
AYALA VAZQUEZ, ENRIQUE
HU, HONGFEI
Assignee: APPLE INC
CPC Classifications: [{"code": "H01Q13/10", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q5/35", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q5/342", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q5/335", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q5/328", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q1/44", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q1/2291", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q21/28", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q9/42", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q13/10", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q1/12", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q1/38", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q1/243", "inventive": true, "first": true, "tree": "[]"}, {"code": "H01Q1/243", "inventive": true, "first": true, "tree": "[]"}, {"code": "H01Q1/24", "inventive": true, "first": true, "tree": "[]"}, {"code": "H01Q13/10", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q5/35", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q1/243", "inventive": true, "first": true, "tree": "[]"}]
Family ID: 80476699