PATENT DOCUMENT

Publication Number: US-12107335-B2
Application Number: US-202217728737-A
Country: US
Kind Code: B2

Title: Electronic devices with distributed slot antenna structures

Abstract:
An electronic device may have peripheral conductive housing structures, a display frame, a support plate, a logic board, and an antenna. The antenna may have a resonating element that includes a first slot between the logic board and a segment of the peripheral conductive housing structures, a second slot between the display frame and the segment, and optionally a third slot between the support plate and the segment. The slots may be at least partially overlapping, may have respective lengths, may be located at respective distances from a cover layer for the display, and may collectively receive radio-frequency signals in a frequency band such as the L5 GPS band. Switching circuitry and filter circuitry may be coupled to the antenna feed and/or to the antenna feed (s) of one or more adjacent antennas in the electronic device to help to isolate the antennas from each other.

Claims:
What is claimed is: 
     
       1. An electronic device comprising:
 peripheral conductive housing structures; 
 a display having a display cover layer mounted to the peripheral conductive housing structures; and 
 an antenna comprising:
 a first slot element in a first plane at a first distance from the display cover layer and having a first edge defined by a segment of the peripheral conductive housing structures, wherein the first slot element has a first length, 
 an antenna feed coupled across the first slot element, and 
 a second slot element in a second plane at a second distance from the display cover layer and having a second edge defined by the segment, wherein the first distance is different from the second distance, the second plane is different from the first plane, the second slot element has a second length that is greater than the first length, and the first and second slot elements are configured to collectively convey radio-frequency signals in a frequency band for the antenna. 
 
 
     
     
       2. The electronic device of  claim 1 , the antenna further comprising:
 a third slot element at a third distance from the display cover layer and having a third edge defined by the segment, wherein the third slot element has a third length, the third length is longer than the first length, the first distance is greater than the second distance and less than the third distance, and the first, second, and third slot elements are configured to collectively convey radio-frequency signals in the frequency band. 
 
     
     
       3. The electronic device of  claim 2 , wherein the second and third slot elements each at least partially overlaps the first slot element. 
     
     
       4. The electronic device of  claim 2 , wherein the display comprises a display module configured to emit light through the display cover layer, the display module comprising:
 conductive display structures that define a fourth edge of the second slot element, the fourth edge being opposite the second edge. 
 
     
     
       5. The electronic device of  claim 4 , further comprising:
 a gap in the peripheral conductive housing structures, wherein the first slot element has an open end at the gap and the second slot element has an open end at the gap; and 
 a conductive interconnect structure that couples the conductive display structures to the segment and that forms a closed end of the second slot element opposite the open end of the second slot element. 
 
     
     
       6. The electronic device of  claim 5 , further comprising:
 a rear housing wall mounted to the peripheral conductive housing structures opposite the display cover layer, wherein the rear housing wall comprises a conductive support plate and a dielectric cover layer layered onto the conductive support plate, the conductive support plate defining a fifth edge of the third slot element, the fifth edge being opposite the third edge. 
 
     
     
       7. The electronic device of  claim 6 , further comprising:
 a logic board having conductive structures that define a sixth edge of the first slot element, the sixth edge being opposite the first edge. 
 
     
     
       8. The electronic device of  claim 1 , wherein the second distance is less than the first distance and the electronic device further comprises:
 a logic board having conductive structures defining a third edge of the first slot element, the third edge being opposite the first edge, wherein the display comprises a display module configured to emit light through the display cover layer, and the display module comprises conductive display structures that define a fourth edge of the second slot element, the fourth edge being opposite the second edge. 
 
     
     
       9. The electronic device of  claim 8 , further comprising a conductive interconnect structure that attaches the display module to the segment, wherein the conductive interconnect structure defines a closed end of the second slot element. 
     
     
       10. The electronic device of  claim 1 , wherein the second distance is greater than the first distance and the electronic device further comprises:
 a logic board having conductive structures defining a third edge of the first slot element, the third edge being opposite the first edge; and 
 a rear housing wall mounted to the peripheral conductive housing structures opposite the display cover layer, wherein the rear housing wall comprises a conductive support plate and a dielectric cover layer layered onto the conductive support plate, the conductive support plate defining a fourth edge of the second slot element, the fourth edge being opposite the second edge. 
 
     
     
       11. The electronic device of  claim 1 , wherein the frequency band comprises an L5 Global Positioning System (GPS) band. 
     
     
       12. The electronic device of  claim 11 , further comprising:
 transceiver circuitry; and 
 a low pass filter coupled between the transceiver circuitry and the antenna feed. 
 
     
     
       13. The electronic device of  claim 12 , further comprising:
 a bypass switch that couples the antenna feed to an antenna ground. 
 
     
     
       14. The electronic device of  claim 1 , wherein the first length is perpendicular to the first distance, the second length being perpendicular to the second distance. 
     
     
       15. The electronic device of  claim 1 , wherein the second distance is greater than the first distance, the first slot element having a third edge defined by a conductive trace on a logic board in the electronic device. 
     
     
       16. The electronic device of  claim 15 , wherein the second slot element has a fourth edge defined by a conductive support plate for the electronic device. 
     
     
       17. An electronic device comprising:
 conductive structures; 
 peripheral conductive housing structures that run around the conductive structures, wherein the conductive structures are separated from a segment of the peripheral conductive housing structures by a first slot element; 
 an antenna feed coupled across the first slot element; and 
 a display mounted to the peripheral conductive housing structures and having a display frame separated from the segment of the peripheral conductive housing structures by a second slot element, wherein the second slot element at least partially overlaps the first slot element and is longer than the first slot element, the first and second slot elements are configured to collectively convey radio-frequency signals in a frequency band, and the conductive structures comprise a conductive structure selected from the group consisting of: a support plate for the electronic device and conductive traces on the main logic board. 
 
     
     
       18. The electronic device of  claim 17 , wherein the first slot element is in a first plane separated from a lateral surface of the display by a first distance, the second slot element being in a second plane separated from the lateral surface by a second distance different than the first distance. 
     
     
       19. An electronic device comprising:
 conductive structures; 
 peripheral conductive housing structures that run around the conductive structures, wherein the conductive structures are separated from a segment of the peripheral conductive housing structures by a first slot element; 
 an antenna feed coupled across the first slot element; 
 a display mounted to the peripheral conductive housing structures and having a display frame separated from the segment of the peripheral conductive housing structures by a second slot element, wherein the second slot element at least partially overlaps the first slot element and is longer than the first slot element, the first and second slot elements are configured to collectively convey radio-frequency signals in a frequency band, and the peripheral conductive housing structures include an additional segment separated from the segment by a dielectric gap; and 
 an additional antenna feed coupled to the additional segment and configured to use the additional segment to convey radio-frequency signals in an additional frequency band. 
 
     
     
       20. The electronic device of  claim 19 , further comprising:
 a first transmission line path configured to convey the radio-frequency signals in the frequency band; 
 a second transmission line path configured to convey the radio-frequency signals in the additional frequency band; 
 a single-pole four-throw (SP4T) switch; and 
 a single-pole three-throw (SP3T) switch, wherein the SP4T switch has a first terminal coupled to the additional antenna feed, a second terminal coupled to the antenna feed, and a third terminal coupled to the SP3T switch, and the SP3T switch has a first terminal coupled to the first transmission line path, a second terminal coupled to the second transmission line path, a third terminal coupled to the antenna feed, and a fourth terminal coupled to the SP4T switch.

Description:
This application claims the benefit of U.S. Provisional Patent Application No. 63/243,547, filed Sep. 13, 2021, 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. 
     SUMMARY 
     An electronic device may be provided with wireless circuitry and a housing having peripheral conductive housing structures. A display may be mounted to the peripheral conductive housing structures. The display may include a display module with a conductive display frame. A rear housing wall may be mounted to the peripheral conductive housing structures opposite the display. The rear housing wall may include a conductive support plate. A logic board having conductive structures may be mounted within the housing. 
     The electronic device may include an antenna having a multi-slot distributed slot antenna resonating element. The antenna may include a first slot between the conductive structures and a segment of the peripheral conductive housing structures. An antenna feed may be coupled across the first slot. The antenna may include a second slot between the conductive display frame and the segment. The antenna may include a third slot between the conductive support plate and the peripheral conductive housing structures. The first, second, and third slots may be at least partially overlapping, may have respective lengths, and may be located at respective distances from a cover layer for the display. The first, second, and third slots may collectively receive radio-frequency signals in a frequency band such as the L5 GPS band. If desired, the third slot may be omitted and the first and second slots may collectively receive radio-frequency signals in the L5 GPS band. Switching circuitry and filter circuitry may be coupled to the antenna feed and/or to the antenna feed (s) of one or more adjacent antennas in the electronic device to help to isolate the antennas from each other. 
    
    
     
       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 an end of the electronic device accordance with some embodiments. 
         FIG.  7    is a top interior view of a first corner of an illustrative electronic device having multiple antennas including a distributed slot antenna in accordance with some embodiments. 
         FIG.  8    is a cross-sectional side view of an electronic device having a distributed slot antenna that includes multiple vertically-overlapping slot elements in accordance with some embodiments. 
         FIG.  9    is a circuit diagram of an illustrative radio-frequency front end circuit that may be coupled to the antenna feed for a distributed slot antenna in accordance with some embodiments. 
         FIGS.  10  and  11    are circuit diagrams of illustrative radio-frequency front end circuits that may be coupled to the antenna feeds for antennas in the vicinity of a distributed slot antenna in accordance with some embodiments. 
         FIG.  12    is a circuit diagram showing how multiple antennas in the vicinity of a distributed slot antenna may share a single antenna feed in accordance with some embodiments. 
         FIG.  13    is a chart of illustrative frequency bands that may be covered by antennas in a corner of an electronic device in accordance with some embodiments. 
         FIG.  14    is a top interior view of a second corner of an illustrative electronic device having multiple antennas including a distributed slot antenna in accordance with some embodiments. 
         FIG.  15    is a diagram of an illustrative radio-frequency front end circuit that may be coupled to the antenna feeds for multiple antennas including a distributed slot antenna 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 within corresponding frequency bands at radio frequencies (sometimes referred to herein as communications bands or simply as “bands”). The frequency bands handled by radio-frequency transceiver circuitry  36  may include wireless local area network (WLAN) frequency bands (e.g., Wi-Fi® (IEEE 802.11) or other WLAN communications bands) such as a 2.4 GHz WLAN band (e.g., from 2400 to 2480 MHz), a 5 GHz WLAN band (e.g., from 5180 to 5825 MHz), a Wi-Fi® 6E band (e.g., from 5925-7125 MHz), and/or other Wi-Fi® bands (e.g., from 1875-5160 MHz), wireless personal area network (WPAN) frequency bands such as the 2.4 GHz Bluetooth® band or other WPAN communications bands, 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), 3G bands, 4G LTE bands, 3GPP 5G New Radio Frequency Range 1 (FR1) bands below 10 GHz, 3GPP 5G New Radio (NR) Frequency Range 2 (FR2) bands between 20 and 60 GHz, other centimeter or millimeter wave frequency bands between 10-300 GHz, near-field communications frequency bands (e.g., at 13.56 MHz), satellite navigation frequency bands such as the Global Positioning System (GPS) L1 band (e.g., at 1575 MHz), L2 band (e.g., at 1228 MHz), L3 band (e.g., at 1381 MHz), L4 band (e.g., at 1380 MHz), and/or L5 band (e.g., at 1176 MHz), a Global Navigation Satellite System (GLONASS) band, a BeiDou Navigation Satellite System (BDS) band, ultra-wideband (UWB) frequency bands that operate under the IEEE 802.15.4 protocol and/or other ultra-wideband communications protocols (e.g., a first UWB communications band at 6.5 GHz and/or a second UWB communications band at 8.0 GHz), communications bands under the family of 3GPP wireless communications standards, communications bands under the IEEE 802.XX family of standards, satellite communications bands such as an L-band, S-band (e.g., from 2-4 GHz), C-band (e.g., from 4-8 GHz), X-band, Ku-band (e.g., from 12-18 GHz), Ka-band (e.g., from 26-40 GHz), etc., industrial, scientific, and medical (ISM) bands such as an ISM band between around 900 MHz and 950 MHz or other ISM bands below or above 1 GHz, one or more unlicensed bands, one or more bands reserved for emergency and/or public services, and/or any other desired frequency bands of interest. Wireless circuitry  34  may also be used to perform spatial ranging operations if desired. 
     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. If desired, 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 within a signal beam formed in a desired beam pointing direction that may be steered/adjusted over time). 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 (radiating) 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 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   ). For example, device  10  may include an upper slot such as slot  60 U in upper region  20  and a lower slot such as slot  60 L in lower region  22 . The lower edge of 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 slot  60 U may be defined by segments  66  and  68  (e.g., 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 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 slot  60 L may be defined by segments  74  and  72  (e.g., slot  60 L may be interposed between conductive support plate  58  and segments  74  and  72  of peripheral conductive housing structures  12 W). 
     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., slot  60 U may span the width of device  10 ). Similarly, 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., 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. 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 slot  60 U and gaps  18 - 1 ,  18 - 2 , and  18 - 3 ). Similarly, 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 slot  60 L and gaps  18 - 6 ,  18 - 5 , and  18 - 4 ). 
     Conductive support plate  58 , segment  66 , segment  68 , and portions of 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 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 slot  60 U, conductive support plate  58 , and/or 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 schematic diagram showing how device  10  may include multiple antennas  40  in upper region  20 . As shown in  FIG.  6   , device  10  may include at least six antennas  40  in upper region  20  such as antennas  40 - 1 ,  40 - 2 ,  40 - 3 ,  40 - 4 ,  40 - 6 , and  40 - 6 . This is merely illustrative and, if desired, device  10  may include fewer than six antennas  40  in upper region  20  (e.g., one of antennas  40 - 1  and  40 - 6  may be omitted). Device  10  may also include antennas in lower region  22  ( FIGS.  1  and  5   ). Each antenna may be fed by a corresponding antenna feed  50  (e.g., antenna  40 - 1  have antenna feed  50 - 1 , antenna  40 - 2  may have antenna feed  50 - 2 , antenna  40 - 3  may have antenna feed  50 - 3 , antenna  40 - 4  may have antenna feed  50 - 4 , antenna  40 - 5  may have antenna feed  50 - 5 , antenna  40 - 6  may have antenna feed  50 - 6 , etc.). If desired, an antenna feed  50  may be shared by multiple antennas  40 . This example is merely illustrative and, in general, device  10  may include any desired number of antennas  40 . 
     Antennas  40 - 1 ,  40 - 2 ,  40 - 3 , and  40 - 4  may be located in the top-left corner of device  10 . Antennas  40 - 5  and  40 - 6  may be located in the top-right corner of device  10 . The volume of antenna  40 - 4  may at least partially overlap the volume of antennas  40 - 3 ,  49 - 1 , and/or  40 - 2  if desired. The volume of antenna  40 - 3  may at least partially overlap the volume of antennas  40 - 2  and/or  40 - 4  if desired. The volume of antenna  40 - 5  may at least partially overlap the volume of antenna  40 - 6  if desired. The volume of antenna  40 - 1  may at least partially overlap the volume of antennas  40 - 2 ,  40 - 3 , and/or  40 - 4  if desired. Antennas  40 - 1 ,  40 - 2 ,  40 - 4 ,  40 - 5 , and  40 - 6  may each have antenna resonating elements that are formed at least in part from portions of peripheral conductive housing structures  12 W and/or 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 , and  42 - 6  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 , and antenna feed  50 - 6  of antenna  40 - 6 , 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 (e.g., capacitors, resistors, inductors, switches, etc.), 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 - 6  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.  6   , 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 - 6  may handle radio-frequency communications in one or more frequency bands. In some implementations that are described herein as an example, antenna  40 - 1  covers the L5 GPS band, antenna  40 - 2  covers the 5 GHz WLAN band and one or more UWB bands (e.g., a 6.5 GHz UWB band and a 8.0 GHz UWB band), antenna  40 - 3  covers a cellular UHB, antenna  40 - 4  covers the cellular LB, LMB, MB, HB, one or more satellite communications bands (e.g., for uplink and/or downlink), and the L1 GPS band, antenna  40 - 5  covers the cellular MB, HB, and UHB, the 2.4 GHz WLAN/WPAN band, and one or more satellite communications bands (e.g., for uplink), and antenna  40 - 6  covers the L5 GPS band. Portions of antennas  40 - 4  and  40 - 5  may also be used to form a loop antenna resonating element for an NFC antenna that radiates in an NFC band. This example is merely illustrative. In general, each of the antennas may cover any desired combinations of communications bands. In some implementations, antenna  40 - 1  may be omitted and antenna  40 - 6  may cover the L5 GPS band (e.g., device  10  may include antennas  40 - 2  through  40 - 6 ). In other implementations, antenna  40 - 6  may be omitted and antenna  40 - 1  may cover the L5 GPS band. If desired, a flexible printed circuit including three additional antennas (e.g., a triplet of antennas) for conveying UWB signals and/or including one or more antennas for conveying millimeter/centimeter wave signals through the rear housing wall of device  10  may be mounted in the upper-left corner of device  10  (e.g., overlapping antennas  40 - 1 ,  40 - 2 ,  40 - 3 , and/or  40 - 4 ). 
     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 that are covered by two or more antennas  40  may be used to perform 2X MIMO operations in those frequency bands, if desired. The wireless circuitry may also 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 that are covered by four or more antennas  40  may be used to perform 4X MIMO operations in those frequency bands, if desired. 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 - 6  (e.g., where different frequencies are used to concurrently convey radio-frequency signals with multiple base stations sometimes referred to as a primary cell and a secondary cell). 
     If care is not taken, due to close physical proximity, it can be difficult for antennas  40 - 1 ,  40 - 2 ,  40 - 3 , and  40 - 4  in the upper-left corner of device  10  to each convey radio-frequency signals in corresponding frequency bands with satisfactory antenna efficiency.  FIG.  7    is a top interior view showing how antennas  40 - 1 ,  40 - 2 ,  40 - 3 , and  40 - 4  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.  7   , conductive support plate  58  may be coupled (connected) to segment  76  of peripheral conductive housing structures  12 W. Conductive structures  86  may vertically overlap (overly) conductive support plate  58  (e.g., in the Z direction). Conductive structures  86  may also be coupled (connected) to segment  76  of peripheral conductive housing structures  12 W. Conductive structures  86  may be conductive structures on a main logic board for device  10 , as an example (e.g., ground traces on the main logic board, conductive housings or other conductive portions of components mounted to the main logic board, etc.). Conductive structures  86  may therefore sometimes be referred to herein as conductive logic board structures  86  or simply as main logic board  86 . 
     Conductive portions of the display for device  10  such as conductive display frame  92  may vertically overlap (overly) conductive structures  86  and conductive support plate  58  (e.g., in the Z direction). Conductive display frame  92  may, for example, provide mechanical/structural support and/or grounding for display module  62  of  FIG.  4    (e.g., conductive display frame  92  may form a part of display module  62 ). Conductive display frame  92  may include other conductive portions of the display module and may therefore sometimes be referred to herein as conductive display structures  92 . Conductive display frame  92  may overlap active area AA of display  14  ( FIG.  4   ). The lateral edges of conductive display frame  92  may overlap slot  60 U and may be separated from peripheral conductive housing structures  12 W by inactive area IA of display  14  ( FIG.  4   ). 
     Conductive interconnect structures such as conductive interconnect structure  94  may couple the edge of conductive display frame  92  to peripheral conductive housing structures  12 W at one or more points (e.g., at segment  76 ). Conductive interconnect structure  94  may include conductive adhesive, conductive springs, welds, solder, a conductive clip, a conductive snap, conductive foam, a conductive screw, a conductive screw boss, a conductive pin, and/or any other desired conductive interconnect structures. Conductive interconnect structure  94  may serve to secure, attach, affix, or mount display  14  to peripheral conductive housing structures  12 W and may, if desired, ground conductive display frame  92  to peripheral conductive housing structures  12 W. Conductive interconnect structures such as conductive interconnect structure  94  and/or other grounding structures may electrically couple conductive structures  86 , conductive support plate  58 , and conductive display frame  92  together (e.g., to hold conductive structures  86 , conductive support plate  58 , and conductive display frame  92  at a common ground or reference potential). Conductive structures  86 , conductive support plate  58 , and conductive display frame  92  may, for example, form the antenna ground for antennas  40 - 1 ,  40 - 2 ,  40 - 3 , and  40 - 4 . 
     Conductive structures  86  and conductive support plate  58  may be laterally separated from segments  66  and  68  of peripheral conductive housing structures  12 W by slot  60 U. Antenna  40 - 3  may at least partially overlap slot  60 U, conductive structures  86 , and/or conductive support plate  58 . Antenna  40 - 3  may, for example, have an antenna resonating element arm formed from conductive traces on a flexible printed circuit. If desired, portions of segments  76  and/or  66  may also contribute to the frequency response of antenna  40 - 3 . 
     As shown in  FIG.  7   , antenna  40 - 4  may have an antenna resonating element arm (e.g., an inverted-F antenna resonating element arm) formed from segment  66  of peripheral conductive housing structures  12 W. Antenna  40 - 4  may be fed using antenna feed  50 - 4  ( FIG.  6   ). Antenna feed  50 - 4  may be coupled across slot  60 U. For example, antenna feed  50 - 4  may have a positive antenna feed terminal  52 - 4  coupled to segment  66  and may have a ground antenna feed terminal coupled to conductive structures  86  and/or support plate  58  (not shown in  FIG.  7    for the sake of clarity). Antenna currents for antenna  40 - 4  may flow along segment  66 , conductive support plate  58 , and/or conductive structures  86 , for example. 
     If desired, antenna  40 - 4  may include one or more return paths coupled between segment  66  and the antenna ground. The return path(s) may include antenna tuning components such as switchable inductors, switchable capacitors, filters, impedance matching circuitry, etc. (not shown in  FIG.  7    for the sake of clarity). The antenna tuning components may be used to adjust the frequency response of antenna  40 - 4  in one or more frequency bands. The frequency response of antenna  40 - 4  may be determined by one or more lengths of segment  66  (e.g., the length of segment  66  extending from one or both sides of positive antenna feed terminal  52 - 4  to gaps  18 - 1  and/or  18 - 2 ), one or more harmonic modes of segment  74  and/or slot  60 U, and/or the antenna tuning components coupled to segment  66 , for example. 
     Antenna  40 - 2  may also have an antenna resonating element arm (e.g., an inverted-F antenna resonating element arm) formed from segment  66  of peripheral conductive housing structures  12 W. Antenna  40 - 2  may be fed using antenna feed  50 - 2  ( FIG.  6   ). Antenna feed  50 - 2  may be coupled across slot  60 U. For example, antenna feed  50 - 2  may have a positive antenna feed terminal  52 - 2  coupled to segment  66  and may have a ground antenna feed terminal coupled to conductive support plate  58  and/or conductive structures  86  (not shown in  FIG.  7    for the sake of clarity). Antenna currents for antenna  40 - 2  may flow along segment  66 , conductive support plate  58 , and/or conductive structures  86 , for example. If desired, portions of segment  76  may also contribute to the frequency response of antenna  40 - 2 . 
     As shown in  FIG.  7   , slot  60 U may include an extended (elongated) portion  88 . Extended portion  88  of slot  60 U may extend between segment  76  and conductive structures  86  (e.g., segment  76  and conductive structures  86  may define opposing edges of extended portion  88 ), along a longitudinal axis of device  10  in the -Y direction. Extended portion  88  of slot  60 U may have an open end at gap  18 - 1  and an opposing closed end  102  formed from conductive structures  86 , conductive support plate  58 , conductive interconnect structures, and/or conductive portions of button  106  on segment  76 . Button  106  may be a ringer or volume button for device  10 , as examples. Closed end  102  may extend in the -Y direction a non-zero distance such as length  90  from gap  18 - 1 . In other words, extended portion  88  of slot  60 U may have an elongated length such as length  90 . Extended portion  88  of slot  60 U may sometimes be referred to herein simply as slot  88 . 
     In addition, there may be an elongated slot such as slot  104  between segment  76  and conductive display frame  92  that extends from gap  18 - 1  to conductive interconnect structure  94 . Slot  104  may have an elongated length such as length  96  (e.g., measured parallel to the Y-axis). Slot  104  may have opposing edges defined by segment  76  and conductive display frame  92 . Slot  104  may be an open slot having an open end at gap  18 - 1  and an opposing closed end at conductive interconnect structure  94 . 
     If desired, there may also be an elongated slot such as slot  100  in conductive support plate  58 . Slot  100  may be an open slot that extends from gap  18 - 1  or elsewhere along conductive support plate  58  (e.g., a portion of conductive support plate  58  at or overlapping slot  88  or other portions of slot  60 U) to an opposing closed end  106 . Closed end  106  may be formed from a weld in conductive structures  86  or from other conductive interconnect structures, as examples. Slot  100  may have an elongated length such as length  98  (e.g., measured parallel to the Y-axis). Slot  100  may have opposing edges defined by different portions of conductive support plate  58  or defined by conductive support plate  58  and a lip in segment  76  of peripheral conductive housing structures  12 W, for example. 
     The example of  FIG.  7    is merely illustrative. Slots  104 ,  100 , and  88  need not be linear. If desired, slots  104 ,  100 , and/or  88  may follow other paths (e.g., straight paths, meandering paths, curved paths, paths having a combination of different segments of different orientations and shapes, etc.). The edges of slots  104 ,  100 , and  88  may be linear, curved, or may include any desired number of linear or curved segments. In other words, slots  104 ,  100 , and  88  may have other shapes. 
     Antenna  40 - 1  may be a distributed slot antenna (e.g., a distributed open slot antenna) having multiple electromagnetically coupled slot antenna resonating elements. The slot antenna resonating elements may be vertically distributed across different heights within device  10  (e.g., as measured parallel to the Z-axis). The slot antenna resonating elements in antenna  40 - 1  may include slot  88  between segment  76  and conductive structures  86 , slot  104  between conductive display frame  92  and segment  76 , and slot  100  in conductive support plate  58 . Slot  88  may therefore sometimes be referred to herein as slot antenna resonating element  88 , slot antenna radiating element  88 , radiating slot  88 , open slot antenna resonating element  88 , open slot element  88 , or simply as slot element  88 . Slot  100  may sometimes be referred to herein as slot antenna resonating element  100 , slot antenna radiating element  100 , radiating slot  100 , open slot antenna resonating element  100 , open slot element  100 , or simply as slot element  100 . Slot  104  may sometimes be referred to herein as slot antenna resonating element  104 , slot antenna radiating element  104 , radiating slot  104 , open slot antenna resonating element  104 , open slot element  104 , or simply as slot element  104 . 
     Antenna  40 - 1  may be fed using antenna feed  50 - 1 . Antenna feed  50 - 1  may be coupled across slot element  88 . For example, antenna feed  50 - 1  may have a positive antenna feed terminal  52 - 1  coupled to segment  76  (e.g., at or adjacent gap  18 - 1 ) and may have a ground antenna feed terminal  44 - 1  coupled to conductive structures  86 . Antenna feed  50 - 1  may directly feed slot element  88 . Corresponding antenna currents I 1  may flow around the perimeter of slot element  88  (e.g., through a portion of segment  76  and conductive structures  86  between positive antenna feed terminal  52 - 1  and ground antenna feed terminal  44 - 1 ). A conductive interconnect structure may electrically couple conductive support plate  58  and conductive display frame  92  to conductive structures  86  at ground antenna feed terminal  44 - 1  if desired. 
     In general, the length of the perimeter of slot element  88  and thus length  90  of slot element  88  determines the resonating frequencies of slot element  88  (e.g., where length  90  is approximately equal to one-quarter of the effective wavelength of operation of the antenna). However, length  90  is limited by the presence of conductive structures in button  106 , which prevent slot element  88  from extending further in the -Y direction. This may prevent slot element  88  from resonating on its own at relatively low frequencies such as frequencies in the L5 GPS band at 1176 MHz. As an example, length  90  may be approximately 1/40 times a wavelength corresponding to the L5 GPS band. 
     To mitigate these issues, slot elements  104  and  100  may contribute to the overall resonance and frequency response of antenna  40 - 1  to allow antenna  40 - 1  to resonate at relatively low frequencies such as frequencies in the L5 GPS band. As shown in  FIG.  7   , in addition to antenna currents I 1  around slot element  88 , incident radio-frequency signals (e.g., in the L5 GPS band) may produce antenna currents I 2  around slot element  104  and antenna currents I 3  around slot element  100 . Antenna currents I 2  may run along segment  76 , through conducive interconnect structure  94 , and along conductive display frame  92  between positive antenna feed terminal  52 - 1  and ground antenna feed terminal  44 - 1 . Antenna currents I 3  may run along conductive support plate  58  around slot element  100  and through weld  106  (e.g., between positive antenna feed terminal  52 - 1  and ground antenna feed terminal  44 - 1 ). Antenna currents I 1 , I 2 , and I 3  may be passed to radio-frequency transceiver circuitry  36  ( FIG.  6   ) via antenna feed  50 - 1  in the frequency band of operation of antenna  40 - 1  (e.g., in the L5 GPS band). Length  96  of slot element  104 , length  98  of slot element  100 , and length  90  of slot element  88  may collectively configure antenna  40 - 1  to resonate at relatively low frequencies such as frequencies in the L5 GPS band despite slot element  88  being too short to support resonance at these frequencies on its own. This may allow antenna  40 - 1  to cover the L5 GPS band despite the presence of button  106 , for example. Slot element  88  may sometimes be referred to herein as the primary slot element of antenna  40 - 1  whereas slot elements  104  and  100  are sometimes referred to herein as secondary slot elements of antenna  40 - 1 . 
       FIG.  8    is a cross-sectional side view of antenna  40 - 1  (e.g., as taken in the direction of line AA′ of  FIG.  7   ) that shows how antenna  40 - 1  may include a distributed slot antenna resonating element formed from slots elements  100 ,  88 , and  104  that are vertically overlapping (stacked) in device  10 . 
     As shown in  FIG.  8   , conductive display frame  92  may be laterally separated (e.g., in the X-Y plane) from peripheral conductive housing structures  12 W by slot element  104 . Display cover layer  64  may overlap conductive display frame  92  and slot element  104 . Slot element  104  may be located at a first vertical height within device  10  (e.g., a first distance from display cover layer  64  as measured parallel to the Z-axis). 
     Conductive structures  86  (e.g., a main logic board for device  10 ) may be laterally separated from peripheral conductive housing structures  12 W by slot element  88 . Conductive structures  86  may be mounted to conductive support plate  58  or may be spaced apart from conductive support plate  58 . Slot element  88  may be located at a second vertical height within device  10  (e.g., a second distance from display cover layer  64  that is farther from display cover layer  64  than slot element  104 ). 
     Slot element  100  may be located between conductive structure  110  and conductive support plate  58 . Conductive structure  110  may, for example, be a portion of conductive support plate  58  (e.g., a portion of conductive support plate  58  that is connected to or integral with peripheral conductive housing structures  12 W at rear housing wall  12 R). Slot element  100  may therefore sometimes be referred to herein as being a slot element in conductive support plate  58  (e.g., a slot element having opposing edges defined by conductive support plate  58  as the slot element runs along its length  98  as shown in  FIG.  7   ). Conductive structure  110  may form an integral and inwardly protruding lip for peripheral conductive housing structures  12 W and may therefore sometimes also be referred to herein as a conductive lip  110  of peripheral conductive housing structures  12 W. Dielectric cover layer  56  may be mounted to conductive support plate  58  and peripheral conductive housing structures  12 W. Conductive lip  110  may help to mount dielectric cover layer  56  to peripheral conductive housing structures  12 W (e.g., using a layer of adhesive). Slot element  100  may be located at a third vertical height within device  10  (e.g., a third distance from display cover layer  64  that is farther from display cover layer  64  than slot element  88 ). Conductive interconnect structures (e.g., vertical conductive interconnect structures) such as conductive pins, conductive springs, solder, welds, conductive foam, conductive adhesive, etc., may couple conductive display frame  92  to conductive structures  86  and may couple conductive structures  86  to conductive support plate  58  at one or more locations along slot elements  104 ,  88 , and/or  100  (e.g., at ground antenna feed terminal  44 - 1  of  FIG.  7   ). 
     Slot elements  104 ,  88 , and  100  may be electromagnetically coupled together (intercoupled) (e.g., due to peripheral conductive housing structures  12 W forming edges of each of slot elements  104 ,  88 , and  100 , due to conductive interconnect structures that vertically couple conductive display frame  92  to conductive structures  86  and conductive support plate  58  at one or more points, and/or due to wireless near-field electromagnetic coupling between the overlapping slots). In this way, antenna  40 - 1  may be a multi-layer, multi-slot, distributed slot antenna having a resonating element that is collectively formed from slot elements  100 ,  88 , and  104  (e.g., a multi-layer, multi-slot, distributed slot antenna resonating element), whereas the antenna feed  50 - 1  ( FIG.  7   ) for antenna  40 - 1  is coupled across one of the slot elements (e.g., slot element  88 ). Antenna  40 - 1  may radiate through the front face and/or the rear face of device  10 . 
     The length  90  of slot element  88 , the length  96  of slot element  104 , and the length  98  of slot element  100  ( FIG.  7   ) may collectively establish the resonating frequencies of antenna  40 - 1 , such that the antenna currents I 1  running around the perimeter of slot element  88  (e.g., in the X-Y), antenna currents I 2  running around the perimeter of slot element  104 , and antenna currents I 3  running around the perimeter of slot element  100  collectively resonate in the frequency band of antenna  40 - 1  (e.g., in the L5 GPS band). Corresponding radio-frequency signals in the frequency band may be passed to radio-frequency transceiver circuitry  36  ( FIG.  6   ) over antenna feed  50 - 1  ( FIG.  7   ). If desired, antenna  40 - 1  may also be used to transmit radio-frequency signals in one or more frequency bands. 
     If desired, antennas  40 - 1 ,  40 - 2 , and  40 - 3  may have respective front-end circuits  78  that help to electromagnetically isolate the antennas from each other despite their close proximity within device  10 .  FIG.  9    is a circuit diagram of one exemplary front-end circuit  78 - 1  that may be coupled to positive antenna feed terminal  52 - 1  of antenna  40 - 1  ( FIG.  7   ). 
     As shown in  FIG.  9   , front-end circuit  78 - 1  may have a first terminal  112  and a second terminal  114 . First terminal  112  may be coupled to positive antenna feed terminal  52 - 1  on segment  76  of  FIG.  7    (e.g., through a conductive feed pad, conductive screw, screw boss, solder, etc.). Second terminal  114  may be coupled to radio-frequency transceiver circuitry  36  through transmission line path  42 - 1  ( FIG.  6   ). Front-end circuit  78 - 1  may include an inductor such as inductor  116  coupled in series between terminals  112  and  114 . Front-end circuit  78 - 1  may include a shunt capacitor such as capacitor  118  coupled between antenna ground  120  and a circuit node  123  between terminal  112  and inductor  116 . 
     Capacitor  118  may have a capacitance and inductor  116  may have an inductance that configure front-end circuit  78 - 1  to perform impedance matching between transmission line path  42 - 1  and antenna  40 - 1  at the frequencies of operation of antenna  40 - 1  (e.g., in the L5 GPS band). Capacitor  118  and inductor  116  may also configure front-end circuit  78 - 1  to form a low-pass filter that prevents high frequency antenna current on segment  76  (e.g., as produced by antennas  40 - 2  and/or  40 - 3 ) from passing to transmission line path  42 - 1  and interfering with the operation of antenna  40 - 1 . The capacitance of capacitor  118  may be, for example, 1-5 pF, 3 pF, 2-4 pF, 1-10 pF, or other capacitances. The inductance of inductor  116  may be, for example, 10-30 nH, 20 nH, 5-45 nH, 1-50 nH, or other inductances. 
     If desired, front-end circuit  78 - 1  may include a bypass switch such as switch  119 . Switch  119  may be coupled between antenna ground  119  and a circuit node  121  between circuit node  123  and terminal  112 . Switch  119  may be turned off (open) when antenna  40 - 1  is active and may be turned on (closed) when antenna  40 - 1  is inactive. This may help to maximize electromagnetic isolation between antennas  40 - 1 ,  40 - 2 , and/or  40 - 3 , for example. The example of  FIG.  9    is merely illustrative and, in general, front-end circuit  78 - 1  may include any desired circuit components coupled together in any desired manner. 
       FIG.  10    is a circuit diagram of one exemplary front-end circuit  78 - 2  that may be coupled to antenna feed  50 - 2  of antenna  40 - 2  ( FIG.  6   ). As shown in  FIG.  10   , front-end circuit  78 - 2  may have a first terminal  122  and a second terminal  124 . First terminal  122  may be coupled to the positive antenna feed terminal of antenna feed  50 - 2  ( FIG.  6   ). Second terminal  124  may be coupled to radio-frequency transceiver circuitry  36  through transmission line path  42 - 2  ( FIG.  6   ). Front-end circuit  78 - 2  may include capacitors such as capacitors  126 ,  128 , and  130  coupled in series between terminals  122  and  124 . Front-end circuit  78 - 2  may include a shunt inductor such as inductor  132  coupled between circuit node  129  (e.g., between capacitors  128  and  130 ) and antenna ground  120 . 
     Capacitors  126 ,  128 , and  130  may have capacitances and inductor  132  may have an inductance that configures front-end circuit  78 - 2  to perform impedance matching between transmission line path  42 - 2  and antenna  40 - 2  at the frequencies of operation of antenna  40 - 2 . Capacitors  126 - 130  and inductor  132  also configure front-end circuit  78 - 2  to form a high-pass filter that prevents low frequency antenna current on segment  66  ( FIG.  7   ) from passing to transmission line path  42 - 2  and interfering with the operation of antenna  40 - 2 . The capacitance of capacitor  126  may be 0.2 pF, the capacitance of capacitor  128  may be 0.3 pF, and the capacitance of capacitor  130  may be 2.4 pF, as examples. The example of  FIG.  10    is merely illustrative and, in general, front-end circuit  78 - 2  may include any desired circuit components coupled together in any desired manner. 
       FIG.  11    is a circuit diagram of one exemplary front-end circuit  78 - 3  that may be coupled to antenna feed  50 - 3  of antenna  40 - 3  ( FIG.  6   ). As shown in  FIG.  11   , front-end circuit  78 - 3  may have a first terminal  134  and a second terminal  136 . First terminal  134  may be coupled to the positive antenna feed terminal of antenna feed  50 - 3  ( FIG.  6   ). Second terminal  136  may be coupled to radio-frequency transceiver circuitry  36  through transmission line path  42 - 3  ( FIG.  6   ). Front-end circuit  78 - 3  may include inductors such as inductors  138  and  140  coupled in series between terminals  134  and  136 . Front-end circuit  78 - 3  may include a first shunt capacitor such as capacitor  142  coupled between circuit node  139  (e.g., between inductors  138  and  140 ) and antenna ground  120 . Front-end circuit  78 - 3  may also include a second shunt capacitor such as capacitor  144  coupled between circuit node  141  (e.g., between inductor  140  and terminal  136 ) and antenna ground  120 . Capacitors  142  and  144  and inductors  138  and  140  may perform impedance matching for antenna  40 - 3  at the frequencies of operation of antenna  40 - 3  (e.g., between 3 GHz and 5 GHz). Capacitors  142  and  144  and inductors  138  and  140  may also form a band stop filter at frequencies over 5 GHz, for example. The example of  FIG.  11    is merely illustrative and, in general, front-end circuit  78 - 3  may include any desired circuit components coupled together in any desired manner. 
     If desired, antennas  40 - 2  and  40 - 3  may share a single antenna feed  50 .  FIG.  12    is a circuit diagram showing one example of how antennas  40 - 2  and  40 - 3  may share a single antenna feed. As shown in  FIG.  12   , terminal  122  of front-end circuit  78 - 2  may be coupled to terminal  146 . Terminal  146  may be coupled to positive antenna feed terminal  52 - 2  on segment  66  (FIG.  7 ). Terminal  124  may be coupled to transmission line path  42 - 2 . 
     Terminal  134  of front-end circuit  78 - 3  may be coupled to terminal  122  through a switching circuit such as switch (SW)  148  (e.g., terminal  134  of front-end circuit  78 - 3  may be coupled to switch  148 ). Switch  134  may be turned on (closed) when antenna  40 - 3  is active and may be turned off (open) when antenna  40 - 3  is inactive. This may help to electromagnetically isolate antennas  40 - 3  and  40 - 4 . In this example, antenna  40 - 3  radiates using segment  66  ( FIG.  7   ) rather than using a conductive trace on a flexible printed circuit. The front-end circuitry of  FIGS.  9 - 12    may all be disposed on the same flexible printed circuit if desired. 
       FIG.  13    is a plot of antenna efficiency as a function of frequency for the antennas in the upper-left corner of device  10  (e.g., antennas  40 - 1 ,  40 - 2 ,  40 - 3 , and  40 - 4  of  FIG.  7   ). As shown in  FIG.  13   , curves  150  plot the frequency response of antenna  40 - 4 . As shown by curves  150 , antenna  40 - 4  may convey radio-frequency signals in the cellular low band (LB) (e.g., around 600-960 MHz), the cellular low-midband (LMB) (e.g., between 1400 and 1500 MHz), the L1 GPS band (e.g., at 1575 MHz), the cellular midband (MB) (e.g., between 1700 and 2200 MHz), the cellular high band (HB) (e.g., between 2300 and 2700 MHz), the 2.4 GHz WLAN band (WLAN 1 ) and WPAN band, and a satellite communications bands such as an S-band around 2483.5-2500 MHz (e.g., for reception of downlink signals from a communications satellite constellation that include downlink data such as message data, voice data, or other application data). Antenna tuning component(s) coupled to segment  66  ( FIG.  7   ) may adjust (tune) the frequency response of antenna  40 - 4  across the cellular low band as shown by arrow  151 . Antenna tuning component(s) coupled to segment  66  ( FIG.  7   ) may also adjust the frequency response of antenna  40 - 4  within the low-midband and/or the cellular midband. 
     Curve  156  of  FIG.  13    plots the frequency response of antenna  40 - 1 . As shown by curve  156 , antenna  40 - 1  may convey (e.g., receive) radio-frequency signals in the L5 GPS band at 1176 MHz. Distributing the antenna resonating element of antenna  40 - 1  beyond slot element  88  to also include slot elements  104  and  100  may, for example, serve to reduce the response peak of antenna  40 - 1  in frequency to that shown by curve  156  despite button  106  ( FIG.  7   ) limiting the overall length of slot element  88 . 
     Curve  152  of  FIG.  13    plots the frequency response of antenna  40 - 3 . As shown by curve  152 , antenna  40 - 3  may convey radio-frequency signals in the cellular ultra-high band (UHB) (e.g., between 3300 MHz and 5500 MHz). 
     Curve  154  of  FIG.  13    plots the frequency response of antenna  40 - 2 . As shown by curve  40 - 2 , antenna  40 - 2  may convey radio-frequency signals in the 5 GHz WLAN band (WLAN 2 ) (e.g., between 5180 MHz and 5800 MHz), a first UWB communications band (UWB 1 ) (e.g., a 6.5 GHz band from 6250 MHz to 6750 MHz), and a second UWB communications band (UWB 2 ) (e.g., an 8.0 GHz band from 7750 MHz to 8250 MHz). In this way, the antennas in the corner of device  10  may concurrently perform wireless communications using each of these frequency bands for device  10 . 
     The example of  FIG.  13    is merely illustrative. Curves  150 - 156  may have other shapes in practice. Antennas  40 - 1 ,  40 - 2 ,  40 - 3 , and  40 - 4  may have any desired number of response peaks at any desired frequencies. If desired, antennas  40 - 5  and  40 - 6  in the upper-right corner of device  10  ( FIG.  6   ) may also convey radio-frequency signals in one or more of these bands. For example, antenna  40 - 6  may convey (e.g., receive) radio-frequency signals in the L5 GPS band at 1176 MHz. In these examples, antenna  40 - 1  may be omitted. In other implementations, antenna  40 - 6  may be omitted. 
     At the same time, antenna  40 - 5  may convey radio-frequency signals in the cellular midband, the cellular high band, the 2.4 GHz WLAN band, the cellular ultra-high band, and a satellite communications band such as an L-band around 1610-1626.5 MHz (e.g., for transmission of uplink signals to a communications satellite constellation that include uplink data such as message data, an emergency message, voice data, or other application data). In this way, antennas  40 - 4  and  40 - 5  may collectively perform uplink and downlink communications with a constellation of communications satellites (e.g., to form a bi-directional communications link between device  10  and a satellite ground station or gateway through one or more communications satellites in the constellation of constellation satellites). If desired, device  10  may also include an additional antenna to handle uplink and downlink communications in the satellite communications bands (e.g., for diversity). For example, device  10  may include a seventh antenna  40  in the bottom-right corner of device  10 . This seventh antenna may, for example, have an antenna resonating element arm formed from segment  72  of peripheral conductive housing structures  12 W ( FIG.  5   ). This seventh antenna may transmit radio-frequency signals in a first satellite communications band such as the L-band around 1610-1626.5 MHz (e.g., for transmission of uplink signals to a communications satellite constellation that include uplink data such as message data, an emergency message, voice data, or other application data) and may receive radio-frequency signals in a second satellite communications band such as the S-band around 2483.5-2500 MHz (e.g., for reception of downlink signals from a communications satellite constellation that include downlink data such as message data, voice data, or other application data). This seventh antenna and antennas  40 - 4  and  40 - 5  may collectively provide diversity coverage for both uplink and downlink signals conveyed between device  10  and the satellite constellation, for example. This example is merely illustrative and, if desired, antennas  40 - 4  and  40 - 5  may each transmit radio-frequency signals to the satellite constellation and may each receive radio-frequency signals from the satellite constellation in one or more satellite communications bands. Device  10  may also include an eighth antenna  40  in the bottom-left corner of device  10 . This eighth antenna may, for example, have an antenna resonating element arm formed from segment  74  of peripheral conductive housing structures  12 W ( FIG.  5   ). This eighth antenna may transmit radio-frequency signals to the satellite constellation and may receive radio-frequency signals from the satellite constellation in one or more satellite communications bands (e.g., such that the eighth antenna  40 , the seventh antenna  40 , antenna  40 - 4 , and antenna  40 - 5  provide bidirectional satellite communications coverage from the four peripheral corners of device  10 ). 
       FIG.  14    is a top interior view showing how antennas  40 - 4  and  40 - 5  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.  14   , conductive display frame  92  may vertically overlap (overly) conductive structures  86 . Conductive interconnect structures such as conductive interconnect structure  160  may couple the edge of conductive display frame  92  to segment  70  of peripheral conductive housing structures  12 W. Conductive interconnect structure  160  may include conductive adhesive, conductive springs, welds, solder, a conductive clip, a conductive snap, conductive foam, a conductive screw, a conductive screw boss, a conductive pin, and/or any other desired conductive interconnect structures. Conductive interconnect structure  160  may serve to secure, attach, affix, or mount display  14  to peripheral conductive housing structures  12 W and may, if desired, ground conductive display frame  92  to peripheral conductive housing structures  12 W. Conductive interconnect structures such as conductive interconnect structure  160  and/or other grounding structures may electrically couple conductive structures  86 , conductive support plate  58  (not shown in  FIG.  14    for the sake of clarity), and conductive display frame  92  together (e.g., to hold conductive structures  86 , the conductive support plate, and conductive display frame  92  at a common ground or reference potential). Conductive structures  86 , the conductive support plate, and conductive display frame  92  may, for example, form the antenna ground for antennas  40 - 5  and  40 - 6 . 
     Conductive structures  86  and the conductive support plate may be separated from segments  66  and  68  of peripheral conductive housing structures  12 W by slot  60 U. As shown in  FIG.  14   , antenna  40 - 5  may have an antenna resonating element arm (e.g., an inverted-F antenna resonating element arm) formed from segment  68  of peripheral conductive housing structures  12 W. Antenna  40 - 5  may be fed using antenna feed  50 - 5  ( FIG.  6   ). Antenna feed  50 - 5  may be coupled across slot  60 U. For example, antenna feed  50 - 5  may have a positive antenna feed terminal  52 - 5  coupled to segment  68  and may have a ground antenna feed terminal coupled to conductive structures  86  and/or the conductive support plate (not shown in  FIG.  14    for the sake of clarity). Antenna currents for antenna  40 - 5  may flow along segment  68 , conductive structures  86 , and/or the conductive support plate, for example. Antenna currents on segment  70  may also contribute to the response of antenna  40 - 5 . 
     If desired, antenna  40 - 5  may include one or more return paths coupled between segment  66  and the antenna ground. The return paths may include antenna tuning components such as switchable inductors, switchable capacitors, filters, impedance matching circuitry, etc. (not shown in  FIG.  14    for the sake of clarity). The antenna tuning components may be used to adjust the frequency response of antenna  40 - 5  in one or more frequency bands. 
     As shown in  FIG.  14   , slot  60 U may include an extended (elongated) portion  162 . Extended portion  162  of slot  60 U may extend between segment  70  and conductive structures  86  (e.g., segment  70  and conductive structures  86  may define opposing edges of extended portion  162 ), along a longitudinal axis of device  10  in the -Y direction. Extended portion  162  of slot  60 U may have an open end at gap  18 - 3  and an opposing closed end  164  formed from conductive structures  86 , conductive interconnect structures, etc. Closed end  164  may extend a non-zero distance such as length  166  from gap  18 - 3  in the -Y direction. In other words, extended portion  162  of slot  60 U may have an elongated length such as length  166 . Extended portion  162  of slot  60 U may sometimes be referred to herein simply as slot  162 . 
     In addition, there may be an elongated slot such as slot  158  between segment  70  and conductive display frame  92  that extends from gap  18 - 3  to conductive interconnect structure  160 . Slot  158  may have an elongated length such as length  168  (e.g., measured parallel to the Y-axis). Slot  158  may have opposing edges defined by segment  70  and conductive display frame  92 . Slot  158  may be an open slot having an open end at gap  18 - 3  and an opposing closed end at conductive interconnect structure  160 . Slot  158  may at least partially overlap (overly) slot  164  in the vertical direction. 
     The example of  FIG.  14    is merely illustrative. Slots  162  and  158  need not be linear. If desired, slots  162  and  158  may follow other paths (e.g., straight paths, meandering paths, curved paths, paths having a combination of different segments of different orientations and shapes, etc.). The edges of slots  162  and  158  may be linear, curved, or may include any desired number of linear or curved segments. In other words, slots  162  and  158  may have other shapes. 
     Antenna  40 - 6  may be a distributed slot antenna (e.g., a distributed open slot antenna) having multiple slot antenna resonating elements. The slot antenna resonating elements may be vertically distributed across different heights within device  10  (e.g., as measured parallel to the Z-axis). The slot antenna resonating elements in antenna  40 - 6  may include slot  162  between segment  76  and conductive structures  86  and slot  158  between conductive display frame  92  and segment  70 . Slot  162  may therefore sometimes be referred to herein as slot antenna resonating element  162 , slot antenna radiating element  162 , radiating slot  162 , open slot antenna resonating element  162 , open slot element  162 , or simply as slot element  162 . Slot  158  may sometimes be referred to herein as slot antenna resonating element  158 , slot antenna radiating element  158 , radiating slot  158 , open slot antenna resonating element  158 , open slot element  158 , or simply as slot element  158 . 
     Antenna  40 - 6  may be fed using antenna feed  50 - 6  ( FIG.  6   ). Antenna feed  50 - 6  may be coupled across slot element  162 . For example, antenna feed  50 - 6  may have a positive antenna feed terminal  52 - 6  coupled to segment  70  (e.g., at or adjacent gap  18 - 3 ) and may have a ground antenna feed terminal  44 - 6  coupled to conductive structures  86 . Antenna feed  50 - 6  may directly feed slot element  162 . Corresponding antenna currents I 4  may flow around the perimeter of slot element  162  (e.g., through a portion of segment  70  and conductive structures  86  between positive antenna feed terminal  52 - 6  and ground antenna feed terminal  44 - 6 ). A conductive interconnect structure may electrically couple the conductive support plate and conductive display frame  92  to conductive structures  86  at ground antenna feed terminal  44 - 6  if desired. 
     Slot elements  162  and  158  may collectively contribute to the overall resonance and frequency response of antenna  40 - 6  to allow antenna  40 - 6  to resonate at relatively low frequencies such as frequencies in the L5 GPS band. As shown in  FIG.  14   , in addition to antenna currents I 4  around slot element  162 , incident radio-frequency signals (e.g., in the L5 GPS band) may produce antenna currents I 5  around slot element  158 . Antenna currents I 5  may run along segment  70 , through conducive interconnect structure  160 , and along conductive display frame  92  between positive antenna feed terminal  52 - 6  and ground antenna feed terminal  44 - 6 . Antenna currents I 4  and I 5  may be passed to radio-frequency transceiver circuitry  36  ( FIG.  6   ) via antenna feed  50 - 6  in the frequency band of operation of antenna  40 - 6  (e.g., in the L5 GPS band). Length  166  of slot element  162  and length  168  of slot element  158  may collectively configure antenna  40 - 1  to resonate at relatively low frequencies such as frequencies in the L5 GPS band despite slot element  162  being too short to support resonance at these frequencies on its own. Slot element  162  may sometimes be referred to herein as the primary slot element of antenna  40 - 6  whereas slot element  158  is sometimes referred to herein as a secondary slot element of antenna  40 - 6 . 
     If desired, positive antenna feed terminal  52 - 6  may also be used to feed radio-frequency signals for antenna  40 - 5  (e.g., antenna  40 - 5  may have two positive antenna feed terminals coupled to peripheral conductive housing structures  12 W at opposing sides of gap  18 - 3 ).  FIG.  15    is a diagram of illustrative radio-frequency front-end circuitry for antennas  40 - 5  and  40 - 6  in implementations where antennas  40 - 5  and  40 - 6  share positive antenna feed terminal  52 - 6 . 
     As shown in  FIG.  15   , radio-frequency front-end circuitry  173  may include a first switching circuit  170  and a second switching circuit  172 . Switching circuits  170  and  172  may collectively form front-end circuits  78 - 5  and  78 - 6  for antennas  40 - 5  and  40 - 6  ( FIG.  6   ). Switching circuits  170  and  172  may couple transmission line path  78 - 5  and transmission line path  78 - 6  to positive antenna feed terminal  52 - 5  (on segment  68  of  FIG.  14   ) and positive antenna feed terminal  52 - 6  (on segment  70  of  FIG.  14   ). 
     As shown in  FIG.  15   , switching circuit  172  may have a first terminal (port)  186 , a second terminal  184 , a third terminal  182 , and a fourth terminal  180 . Switching circuit  170  may have a first terminal (port)  178 , a second terminal  176 , and a third terminal  174 . Terminal  186  on switching circuit  172  may be coupled to transmission line path  42 - 5 . Terminal  184  on switching circuit  172  may be coupled to transmission line path  42 - 6 . Terminal  182  on switching circuit  172  may be coupled to positive antenna feed terminal  52 - 6 . Terminal  180  on switching circuit  172  may be coupled to terminal  178  on switching circuit  170 . Terminal  176  on switching circuit  170  may be coupled to positive antenna feed terminal  52 - 6 . Terminal  174  of switching circuit  170  may be coupled to positive antenna feed terminal  52 - 5 . Front-end circuitry  173  of  FIG.  15    may, for example, be disposed on a common/shared flexible printed circuit. 
     Switching circuit  172  may include, for example, a radio-frequency switch such as a single-pole three-throw (SP3T) switch that includes a series switch (e.g., a field-effect transistor (FET)) that selectively connects or disconnects transmission line path  42 - 6  from the antenna feed for antenna  40 - 6 , a switchable shunt capacitor (e.g., a capacitor in series with a respective FET) that performs impedance matching for antenna  40 - 5 , and a switchable series inductor (e.g., an inductor in series with a respective FET) that performs impedance matching for antenna  40 - 5 . 
     Switching circuit  170  may include, for example, a radio-frequency switch such as a single-pole four-throw (SP4T) switch that includes two switchable shunt inductors coupled across slot element  162  ( FIG.  6   ) (e.g., parallel inductors in series with corresponding FETS) from positive antenna feed terminal  52 - 5  to the antenna ground and two switchable series capacitors (e.g., capacitors in series with respective FETS) coupled across gap  18 - 3  ( FIG.  14   ) between positive antenna feed terminal  52 - 5  and positive antenna feed terminal  52 - 6  (e.g., between terminals  174  and  176 ). 
     Control circuitry  38  ( FIG.  2   ) may adjust switching circuits  170  and  172  to tune the frequency response of antennas  40 - 5  and  40 - 6  to cover different frequency bands of interest as needed while also electromagnetically isolating the antennas from each other. For example, front-end circuitry  173  may tune antenna  40 - 5  by shunting the inductors in switching circuit  170  to ground, allowing for a change in the electrical length of the slot in antenna  40 - 5 . This may be used to tune the frequency response of antenna  40 - 5  across the cellular midband, the cellular high band, the cellular ultra-high band, and the satellite communications band handled by antenna  40 - 5 . The series capacitors in switching circuit  172  may be used to fine-tune the frequency response of antenna  40 - 5  within the cellular midband, the cellular high band, the cellular ultra-high band, and the satellite communications band handled by antenna  40 - 5 , as well as to boost midband/high band antenna efficiency. In addition, the series capacitors may be used to fine-tune the resonant frequency of antenna  40 - 6  (e.g., in the L5 GPS band). 
     Switching circuit  172  may be used to selectively activate (turn on) antenna  40 - 6  for receiving radio-frequency signals (e.g., in the L5 GPS band). Switching circuit  172  may be used to eliminate lossy modes that occur when antenna  40 - 6  is inactive (e.g., when the feed FET for antenna  40 - 6  is turned off), which may optimize performance of antenna  40 - 5  in the cellular ultra-high band, for example. Turning off the FET for the series inductor in switching circuit  172  may be used to optimize performance of antenna  40 - 5  in the satellite communications band with improved narrowband matching. When antenna  40 - 6  is active (connected), this inductor can also be used to optimize the 2.4 GHz WLAN/WPAN response of antenna  40 - 4 . Turning on the FET for the shunt capacitor in switching circuit  172  may serve as an additional tuning knob that can be used to optimize matching in the cellular high band for antenna  40 - 5 . The example of  FIG.  15    is merely illustrative and, in general, front-end circuitry  173  may include any desired circuit components coupled together in any desired manner for optimizing the performance of antennas  40 - 5  and  40 - 6 . 
     Device  10  may gather and/or use personally identifiable information. It is well understood that the use of personally identifiable information should follow privacy policies and practices that are generally recognized as meeting or exceeding industry or governmental requirements for maintaining the privacy of users. In particular, personally identifiable information data should be managed and handled so as to minimize risks of unintentional or unauthorized access or use, and the nature of authorized use should be clearly indicated to users. 
     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: 20220425
Publication Date: 20241001
Grant Date: 20241001
Priority Date: 20210913
Inventors: LI, AOBO
IRCI, Erdinc
DI NALLO, CARLO
AYALA VAZQUEZ, ENRIQUE
TIAN, Haozhan
HU, HONGFEI
HAN, LIANG
CHEN, MING
TSAI, MING-JU
YARGA, SALIH
YU, TIEJUN
LEE, VICTOR C
HAN, XU
Assignee: APPLE INC
CPC Classifications: [{"code": "H04B1/00", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q21/06", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04M1/0266", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04B1/0064", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04M1/0249", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04M1/026", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q5/307", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q13/10", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q1/243", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q21/064", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04B1/0064", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04M1/0266", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04B1/0064", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04B1/00", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q21/06", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01Q21/064", "inventive": true, "first": true, "tree": "[]"}]
Family ID: 85478567