Chassis for an electronic device, electronic device, antenna module, and method for fabricating an electronic device

A chassis for an electronic device is provided. The chassis comprises a chassis part made of conducting material. At least one slot antenna is formed in the chassis part made of conducting material.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to European Application 20216793.8, filed on Dec. 23, 2020. The content of this earlier filed application is incorporated by reference herein in its entirety.

FIELD

The present disclosure relates to antenna structures for electronic devices. In particular, examples relate to chassis for an electronic device, electronic devices, mobile devices, antenna modules and methods for fabricating an electronic device.

BACKGROUND

For a laptop, a sufficient connectivity of an antenna may be given especially for one operation mode, namely open lid-mode. On the other hand, the connectivity of the antenna may be insufficient for other operating modes, e.g., for closed lid-mode and/or tent-mode, because radiation emitted by the antenna may be partially shielded in these operation modes. Thus, an improved antenna design and/or placing may be desired.

DETAILED DESCRIPTION

FIG.1shows a schematic view of an example of a chassis100for an electronic device. The chassis100comprises a chassis part110made of conducting material. Further, at least one slot antenna120is formed in the chassis part110made of conducting material.

The integration of an antenna into the electronic device may be facilitated by forming the slot antenna120in the conducting chassis part110. As the slot antenna120is integrated into the chassis100, assembly of the electronic device may be facilitated. Further, the chassis100may allow to reduce production costs of the electronic device as no separate antenna device is needed.

The conducting material may, e.g., be a metal, a semiconductor or a conductive polymer. For example, the conducting chassis part110may be entirely formed of the conducting material. Alternatively, the conducting chassis part110may be formed by a conductive layer on top of a non-conducting chassis part. For example, a non-conducting chassis part may be partially metalized to form the conducting chassis part110. Thus, the conducting chassis part110may be formed by a cheap non-conducting material, e.g., plastic, and only a layer on top may be utilized to form the conducting chassis part110, which may reduce material cost for the chassis100.

The at least one slot antenna120may be formed on a lateral part115of the chassis100. The lateral part115is a part of the chassis100that extends between the parts of the chassis100defining the bottom and top surfaces of the chassis. By forming the slot antenna120in the lateral part115the slot antenna120may advantageously radiate and/or receive electromagnetic waves substantially without being influenced by other parts of the chassis100and/or the electronic device—e.g., independent of an operation mode of the electronic device. Thus, forming the slot antenna120in the lateral part115of the chassis may allow an improved radiation and/or reception of electromagnetic waves for each operation mode.

The chassis100may comprise a first chassis part117and a second chassis part118connected to each other. The first chassis part117may be adapted for placing the chassis100on a surface (e.g., defining the bottom of chassis100) such that the first chassis part117may be arranged between the surface and the second chassis part118, and the at least one slot antenna120may be formed in the second chassis part118. For example, the first chassis117part may define the bottom of the chassis100, e.g., a bottom surface, and/or the second chassis part118may define the top surface198of the chassis100. The top surface198and the bottom surface197may be parallel to each other. The lateral part115may belong to the first chassis part117(e.g., defining the bottom surface197of the chassis100) or the second chassis part118(e.g., defining the top surface198of the chassis100). A height of the lateral part115may define a distance between the bottom surface197and the top surface. A keyboard and/or touchpad may be integrated in the top surface198of the second chassis part118. A footer may be integrated in the bottom surface197of the first chassis part117.

By arranging the slot antenna120in the second chassis part118a distance to the surface, on which the first chassis part117may be placed, may be increased. Thus, an attenuation of electromagnetic waves radiated by the slot antenna120may advantageously be decreased due to the increased distance between the slot antenna120and the surface. The slot antenna120may be arranged in the lateral part115of the second chassis part118and/or in the top surface.

The at least one slot antenna120may be formed by an opening122in the chassis part110made of conducting material. The opening122may be formed by removing a part of the conducting chassis part110, e.g., by laser cutting or mechanical cutting. It is to be noted that the shape of the opening122for forming the at least one slot antenna120is merely exemplary. In general, any suitable shape may be used for the opening122.

The opening122may be filled with non-conducting material124. The non-conducting material124may be e.g., a polymer (e.g., polyphenylene sulfide or polybutylene terephthalate). The non-conducting material124may be formed by plastic injection insert molding. Thus, the opening122may be closed by the non-conducting material124, which may improve an external appearance of the chassis100. Further, intrusion of foreign material into the chassis100may be avoided such that the circuitry and devices inside the chassis100may be protected from the foreign material.

The non-conducting material124to fill the opening122may have a base125. The base125may be configured to improve an arrangement of the non-conducting material124. Further, the base125may be arranged in a second opening123in the chassis100. The second opening123may be in the first chassis part117, e.g., in the bottom surface197. Thus, the second opening123may improve an arrangement and/or stability of the non-conducting material. Further, the second opening123may provide a wider impedance bandwidth of the slot antenna120. For example, the second opening123in the chassis may be adjusted to improve a radiation performance of the slot antenna120.

The chassis100may be entirely made of conducting material. Thus, a manufacturing process of the chassis100may be facilitated, because the chassis100may be manufactured only by forming and removing processes, e.g., by use of a computerized numerical control machine.

Alternatively, the chassis100may be made of a non-conducting material, e.g., a polymer, except of the conducting part110. Thus, a material cost for the chassis100may be reduced.

The chassis100may further comprise a second slot antenna (not illustrated inFIG.1) formed in the chassis part110made of conducting material or formed in another chassis part made of conducting material. The second slot antenna may be arranged at another lateral part of the chassis100opposite to the at least one slot antenna120(e.g., similar to what is illustrated inFIG.14). For example, the slot antenna120and the second antenna may be arranged on opposite edges (e.g., sides of the electronic device; e.g., the lateral part) of the electronic device. Radiation and/or reception of electromagnetic waves by the electronic device may be improved because both antennas may cover different areas of the space surrounding the electronic device.

FIG.1shows an example of antenna construction in an edge of an electronic device, e.g., a full metal chassis laptop. A proximity feed antenna concept may be applied for feeding the slot antenna120. A (compact) slot pattern is shown in theFIG.1. The slot antenna120may be proximity coupled by a metal strip. The metal strip may be placed behind the slot antenna120. A coaxial cable may be soldered to the metal strip and connected to a radio-frequency-module (RF-module).

The proposed slot antenna120may be made in an edge of the chassis100, e.g., in the second chassis part120(also referred to as C-cover, with a Z-height (seeFIG.4)). The C-cover may be adapted as a housing for a system assembly. The system assembly may comprise assembling a keyboard (e.g., into the second chassis part118) and/or other parts of the electronic device such as a motherboard. An Antenna pattern in an edge of the C-cover may be made by creating openings (e.g., the opening122) in the edge. These openings may further be filled by any non-conducting (e.g., plastic) martial. For example, slots of the opening122may have a width of at most 1.5 mm, or at most 1.3 mm or at most 1.1 mm, or at most 1 mm. The (slot) opening122may be identified easily in the chassis100, thus the slot antenna pattern may help to generate a seamless industrial design.

As shown in theFIG.1, a top of the C-cover may have no cutouts for the antenna. This may give a seamless look to the system, e.g., the chassis100, as well as it may improve a performance when a lid of the chassis100may closed. Also shown inFIG.1is the opening122(e.g., in the C-cover) and the second opening123(e.g., in the first chassis part117, also referred to as D-cover). Both openings122,123may be a part of an antenna pattern, e.g., for forming the slot antenna120.

More details and aspects are mentioned in connection with the examples described below. The example shown inFIG.1may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described below (e.g.,FIG.2-20).

FIG.2shows a schematic view of an example of a second part of a chassis. The second chassis part118may further comprise a radiation shielding130configured to electromagnetically shield the slot antenna120from an interior of the chassis100. Thus, an excitation/operation of the slot antenna120may be improved, e.g., by reducing coupling of electromagnetic signals (e.g., generated by electronic circuitries) arranged inside the chassis100. The radiation shielding130may be formed by, e.g., metal.

The chassis100may further comprise at least one conducting gasket (see, e.g.,FIG.13) arranged between the radiation shielding130and another part of the chassis100. The chassis100may further comprise two conducting gaskets (see, e.g.,FIG.13) arranged between the radiation shielding130and a respective other part of the chassis100. One conducting may by in contact with the first chassis part117and another conducting gasket may be in contact with the second chassis part118. The two conducting gaskets may be arranged at opposite sides of the radiation shielding130. A conducting gasket may improve a connection between the radiation shielding130and the chassis100(e.g., the first chassis part117and the second chassis part118), which may increase an effect of the radiation shielding130. For example, the radiation shielding130arranged between two conducting gaskets may shield almost all radiation and thus electromagnetically shield one space140in the chassis100on a first side of the radiation shielding130from another space141in the chassis100on a second side of the radiation shielding130. Thus, a slot antenna120arranged in one space140may be improved electromagnetically shielded against electronic circuitries arranged in the other space141.

FIG.2shows an example of a radiation shielding130, e.g., a barricade (e.g., the barricade may be made of metal), arranged next to the antenna (pattern)120. The barricade may electromagnetically shield the slot antenna120from the other electronic circuitries of the electronic device arranged in the other space141. Thus, a radio frequency interference (RFI) issue may advantageously be minimized.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.3may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1) and/or below (e.g.,FIG.3-20).

FIG.3shows a schematic view of an example of non-conducting material. The non-conducting material124may be used to fill an opening for a slot antenna. For example, the non-conducting material may be inserted in the chassis as shown inFIG.1.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.3may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-2) and/or below (e.g.,FIG.4-20).

FIG.4shows a schematic view of an example of an unfolded chassis. The chassis may comprise a first chassis part117(D-cover) and a second chassis part118(C-Cover). The second chassis part118may comprise a lateral part115with a height z114. A slot antenna120may be formed by an opening122and a second opening123and both openings122,123may be filled by a non-conducting material124with a base125.

FIG.4ashows an outer view of the chassis, thus the slot antenna120and both openings can be seen.

FIG.4bshow an inner view of the chassis, thus the slot antenna and both openings may be covered by the non-conducting material124. However, an exciter151of an antenna feed can be seen inFIG.4b. The exciter151may have a L-shape. The exciter151may be made of metal. The exciter151may be made on a flexible printed circuit board (FPC) or on a printed circuit board (PCB). Alternatively, the exciter151may stick directly on the non-conducting material124. The exciter151may be used to proximity feed the slot antenna120.

FIG.4shows an example of a 2D-drawing of the proposed antenna in a laptop base when C-cover, D-cover and Z-edge of the laptop are unfolded. Gray color in the figure may show a metal, while white color may show a non-metal filled area. The dotted line may show folding edges of the chassis. The opening122may be made in the C-cover118and/or in the D-cover117. The non-conducting material124may be used to fill the opening122for a slot antenna. For example, the non-conducting material124may be inserted in the chassis as shown inFIG.1.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.4may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-3) and/or below (e.g.,FIG.5-20).

FIG.5shows an example of a cutout and an antenna feed. The chassis shown inFIG.1may be implemented in the electronic device500. For example, the electronic device500comprises a chassis described above and an antenna feed150configured to excite the at least one slot antenna120based on a feed signal. The slot antenna120may be formed in a second part118of the chassis.

The antenna feed150may comprise an exciter151, which may be proximity coupled to the at least one slot antenna120. Thus, a contact of the exciter151with the slot antenna120for applying a feed signal may advantageously be omitted. For example, a chassis with a slot antenna120may be produced in a facilitated process independently of other assembling processes. Further, a replacement of the antenna feed150may be facilitated.

The antenna feed150may be formed on a printed circuit board or on a flexible printed circuit board. Thus, an assembling of the antenna feed150and the chassis and/or a replacement of the antenna feed150may be facilitated.

The antenna feed150may comprise a feed line152and the feed line152may form a short circuit. Alternatively, the antenna feed150may comprise a feed line152and the feed line152may form an open circuit. Thus, the feed line152may advantageously be adjusted to an operation mode. The feed line152may comprise the exciter151, a matching circuit155and a coaxial cable163.

The antenna feed150may comprise an impedance matching circuit155. The matching circuit155may be Pi-type or a L-type or a T-type matching circuit. Thus, an impedance matching of the antenna feed150may be improved by a chosen matching circuit155and may be adjusted for an operation mode.

The antenna feed150may comprise a feed line152passing through an opening in a radiation shielding of the electronic device500that electrically shields the slot antenna120from an interior of the chassis. A part of the feed line152, which passes through the opening may be formed by a coaxial cable163. Further, the feed line152(e.g., the coaxial cable163) may be enclosed by a sleeve of conducting material that covers the opening in the radiation shielding. Thus, the exciter150may be fed by a feed signal generate by an electronic feeding circuitry arranged on a different side of the radiating shielding as the exciter150. Therefore, an electromagnetic signal, which may be generated by this electronic device may be shielded by the radiation shielding. For example, the exciter150may be shielded by the radiation shielding against an electromagnetic signal of the electronic feeding circuitry. Thus, an excitation/operation of the slot antenna120may be improved by the radiation shielding. The sleeve of conducting material that covers the opening in the radiation shielding may further improve an excitation/operation of the slot antenna120. For example, the sleeve may shield radiation that may otherwise pass through the opening, thus a shielding of the slot antenna120may be improved.

The slot antenna120may comprise at least two slots119,121adapted for transmitting and receiving at two different wavelengths. A first slot119may be formed by a path A-C (path from point A to point C). A length of the path A-C may be measured from edge119A to edge119C. For example, the length of path A-C may be the distance between a first edge119A and a second edge119C. The second slot may be formed by a path A-B (path from point A to point B). A length of the path A-B may be measured from edge119A to edge121C. For example, the length of path A-B may be the distance between a first edge119A and a third edge121B. The length of each path may be determined by λi/4, with λia desired frequency for radiation.

For example, the path A-C may be adjusted for a first frequency of at least 2.1 GHz, or at least 2.2 GHz, or at least 2.3 GHz and/or at most 2.6 GHz, or at most 2.5 GHz, or at most 2.4 GHz. For example, the path A-B may be adjusted for a second frequency of at least 5 GHz, or at least 5.2 GHz, or at least 5.4 GHz and/or at most 6.1 GHz, or at most 5.9 GHz, or at most 5.7 GHz, or at most 5.5 GHz. Thus, the two slots119,121may have two different resonance frequencies. For example, each slot119,121may work as magnetic monopole antenna. Therefore, the slot antenna120comprising two slots119,121may work as multiband antenna, which may facilitate a manufacturing process of a multiband antenna of an electronic device.

The antenna feed150may be arranged to excite the at least two slots119,121at the same time. Thus, a multiband operation of the slot antenna120may advantageously be achieved with only one antenna feed150.

The electronic device500may be a mobile device, e.g., a laptop or a foldable smartphone.

FIG.5shows an example of a slot and a feeding structure, e.g., the antenna feed150. The slot antenna150may have two sections119,121. A first section121may be formed from point A to point B, which may give resonance for a lower frequency band at 2.4 GHz. A length between point A and point B may be approximately λi/4 with λi=2.4 GHz. A second section119may be formed from point A to point C, which may give a resonance for a higher frequency band 5 GHz-6 GHz. The length between point A to point C may be approximately λi/4 with λi=5.5 GHz. The different slot lengths for the different sections119,121may yield to two resonance frequency bands and these slots may work as magnetic monopole antenna, each. The slot antenna150may be tuned for different wireless local area network-6E (WLAN-6E) frequency bands (2.4 GHz, 5 GHz and 6 GHz). The 2.4 GHz frequency band may be 2400-2500 MHz, the 5 GHz frequency band may be 5180-5825 MHz and the 6 GHz frequency band may be 5925-7125 MHz.

The sections (e.g., the slots forming each section) may be excited using a proximity coupled antenna feeding method. A feed line152(e.g., the exciter151) may be routed in a way that it couples to both sections119,121(point A to point B and point A to point C) simultaneously. An intersection of the feed line152and then sections may be offset from a short end of each section to, which may improve an impedance matching.

The antenna feed150may be formed on a supporting element161, e.g., FPC, PCB or a metal plate. The antenna feed150may be arranged behind the slot antenna150by gluing, e.g., by gluing the antenna feed150or the supporting element161. For example, the antenna feed150or the supporting element161may be glued to a backside of the non-conducting material. A RF coaxial cable163may be used to connect the antenna feed150to a RF-modem. One end of the coaxial cable163may be connected to a coupling element168and another end may be connected to the RF-modem (not shown). An outer conductor165of the coaxial cable163may be used for grounding. For example, the outer conductor may be connected to a FPC ground166. For example, the FPC ground166may be connected to the chassis. An inner conductor164of the coaxial cable163may be connected/soldered to the coupling element168. An end153of the feed line152may have an impact on impedance matching. Thus, the feed line152may be formed as an open circuit or a short circuit. A short circuit may be formed by using a spring connector or a screw to contact the feed line152with a part of the chassis (seeFIG.7).

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.5may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-4) and/or below (e.g.,FIG.6-20).

FIG.6shows an antenna feed. The antenna feed650may be implemented in the electronic device ofFIG.5.

The electronic device may further comprise a conductive element610attached to the antenna feed650for grounding the antenna feed650. Thus, a grounding of the antenna feed650may be facilitated by connecting the conductive element610with a part of the chassis. The conductive element610may be attached to the antenna feed650by overlapping a part of the conductive element610with a part of the antenna feed650in an overlap area630with a predefined width631. Thus, a solid connection may be ensured in an easy way, e.g., by soldering both elements in the overlap area630. The conductive element610may be made of metal (e.g., copper). The conductive element610may be used for grounding the antenna feed650. For example, the conductive element610may be connected to the chassis. Thus, a grounding of the antenna feed650may be facilitated by the grounding element630.

The antenna feed650may comprise at least one recess620for facilitating bending of the antenna feed650. By bending the antenna feed650a space required for the antenna feed650may be advantageously decreased. Thus, the antenna feed650may be placed in a smaller space, which may lead to a more compact shape of an electronic device. For example, a height of the chassis (e.g., a z-height of the C-cover) may be reduced.

The antenna feed650may comprise at least one recess630configured to receive an attaching element for attaching the antenna feed650to the chassis. Thus, an attaching of the antenna feed650may be facilitated. Further, the antenna feed650may be easily arranged at a predefined position, e.g., by marks on the chassis that correspond to the at least one recess630.

The antenna feed650for exciting an antenna comprises may comprise a first feed line685, a second feed686line and a third feed line687. The third feed line687may connect the first feed685line with the second feed line686and the second feed line686may be longer as the first feed line. For example, the three feed lines685,686,687may form a F-shape. By the three feed lines685,686,687a simultaneously excitation of both section of a slot antenna may be improved. Thus, a performance of a multiband slot antenna may be increased by the three feed lines685,686,687.

The antenna feed650may further comprise a cable connected to the first feed line for receiving a feed signal. The antenna feed650may further comprise at least one impedance matching circuit arranged at an end region of the first feed line or the second feed line.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.6may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-5) and/or below (e.g.,FIG.6-20).

FIG.7shows examples of antenna feeds. The antenna feeds may be implemented in the electronic device ofFIG.5. InFIG.7aan exciter151of the antenna feed may form an open circuit. InFIG.7ban exciter751of the antenna feed may form a short circuit. The short circuit may be formed by connecting an end of the feed line by a connection element790, (e.g., a spring connector or a screw) to the chassis. Further, an impedance matching may be improved by tuning components780of a matching circuit.

An antenna performance may be achieved by utilizing an open-end feed line without an external matching circuit. But generally, an antenna may get detuned (e.g., a shift in a resonance frequency and impedance mismatch) for different system environment and system assembling. To compensate a detuning, a matching circuit, e.g., a L-type or P-type matching circuit, may be used. The matching circuit may be arranged between a coupler and a coaxial cable feed.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.7may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-6) and/or below (e.g.,FIG.7-20).

FIG.8shows a matching circuit for an antenna feed. The matching circuit may be integrated in any antenna feed shown inFIG.5-7. The antenna feed may be tuned by the L-type or P-type matching circuit.FIG.8shows a P-type matching circuit. A component near an antenna trace (feed line) may be omitted. If a component near the antenna trace may be omitted (DNP: do not populate) the matching circuit may be effectively a L-type.FIG.8shows a shunt inductor (L) and a series capacitor (C). The matching circuit shown inFIG.8shows an example of one possibility for forming a matching circuit. Alternatively, a matching circuit may be any combination of LC components.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.8may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-7) and/or below (e.g.,FIG.9-20).

FIG.9shows a flow-chart of an example of a method for fabricating an electronic device. The method900comprises forming910an opening in a conducting part of a chassis of the electronic device to form a slot antenna and filling920the opening with non-conducting material.

Forming910the opening may be accomplished by cutting out a part of the conducting chassis part, e.g., by laser cutting or mechanical cutting.

Filling920the opening may be accomplished by arranging a non-conducting material in the opening.

The method may further comprise arranging an antenna feed within the chassis such that the antenna feed and the slot antenna may be proximity coupled. This may be done by gluing the antenna feed to the chassis and/or to the non-conducting material.

The method may further comprise arranging a radiation shielding within the chassis such that the radiation shielding at least partially encloses the slot antenna and the antenna feed within the chassis in order to shield the slot antenna and the antenna feed from electromagnetic radiation emitted by other electronic circuitries of the electronic device.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.9may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-8) and/or below (e.g.,FIG.10-20).

FIG.10shows a schematic view of an example of an antenna module. The antenna module1000may be implemented in an electronic device. For example, an electronic device may be retrofitted with an antenna module1000. Alternatively, the antenna module1000may be implemented in an electronic device described inFIG.5replacing the slot antenna formed in the chassis1010. Thus, a replacement of an antenna of the electronic device may be facilitated by replacing the antenna module1000.

The antenna module1000comprises a chassis1010, which may comprise a chassis part1020made of conducting material and a chassis part made of non-conducting material. Further, a slot antenna120is formed in the chassis part1020made of conducting material. Further, an antenna feed150is arranged within the chassis1010and configured to excite the slot antenna120based on a feed signal. For example, the antenna feed may comprise an exciter, which is arranged to proximity feed the slot antenna120.

The part1020of the chassis1010made of conducting material may be made of a metal, a semiconductor or a conductive polymer. The part of the chassis1010made of non-conducting material may be made of a polymer, e.g., plastic.

All sides of the chassis1010may be made of conducting material except one side comprising the chassis part made of a non-conducting material. The part made of non-conducting material may be formed by a base of the non-conducting material used to fill the opening of the slot antenna120. For example, the chassis1010may have on open side1030, in which a base of the non-conducting material to fill the opening may be arranged that forms the one side of the chassis1010.

The antenna module1000may comprise an opening1040for a feed line1052coupled to the antenna feed. The feed line1052may be enclosed by a sleeve of conducting material that covers the opening in a radiation shielding. The radiation shielding may comprise three conducting sides1060of the chassis1010. For example, the radiation shielding may form a space1070in a plane on one side of the slot antenna120that may be shielded against electromagnetic signals from other electronic circuitries of the electronic device. For example, two opposing sides of the radiation shielding may be in contact with the chassis part1020in which the slot antenna120may be formed. Thus, between the opposing sides of the radiation shielding the space1070may be formed.

It goes without saying, that the features described above for a chassis of an electronic device may be applicable for the antenna module1000as well and vice versa.

A mobile device such as, e.g., a laptop-computer, a tablet-computer or a smartphone may comprise the antenna module1000.

FIG.10shows an isometric view of an antenna module1000. The proposed antenna solution (described above) may be used as an antenna module1000. A side of the antenna module1000may comprise the slot antenna120and another side may be made of non-conducting material. All sides of the antenna module1000except of the other side may be made of metal. The slot antenna120may be excited using a conductive trace (e.g., a metallic exciter) arranged behind the slot antenna120. The excitation trace may be formed on FPC, PCB or metal plate. The slot antenna120may be proximately coupled and may radiate and/or receive electromagnetic waves at a desired frequency band. A feed line1052(e.g., a coaxial cable) may be led through an opening1040in the antenna module1000and may be connected to the trace forming a connection between a RF-module and the trace.

The opening1040may be a small hole in the antenna module1000that may be made to pass the coaxial cable and connection of the antenna trace (antenna coupling element). An undesired electromagnetic signal may pass through the opening1040and may result in RF-interference (RFI). Thus, an excitation/performance of the slot antenna may be decreased if the opening1040may be not properly shielded. This issue may be resolved by a hole shielding mechanism (e.g., formed by the sleeve, seeFIG.11). The shielding mechanism may be a metal structure, which may be circular shaped or shaped in any desired way to connect an outer conductor of the feed line1052with the radiation shielding of the antenna module1000to fill an air gap between feed line1052and radiation shielding.

The antenna module1000may be integrated in a base and/or a lid of a laptop or a dual display system (e.g., a foldable smartphone). The antenna module1000may have a length1081of at least 20 mm, or at least 22 mm, or at least 24 mm and/or at most 30 mm, or at most 28 mm, or at most 26 mm. The antenna module1000of may have a width1082of at least 5 mm, or at least 6 mm, or at least 7 mm and/or at most 10 mm, or at most 9 mm, or at most 8 mm. The antenna module1000of may have a height1083of at least 5 mm, or at least 6 mm, or at least 7 mm and/or at most 10 mm, or at most 9 mm, or at most 8 mm.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.10may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-9) and/or below (e.g.,FIG.11-20).

FIG.11shows a schematic view of an example of a feed line. The feed line1152may be a coaxial cable1152. The coaxial cable1152may comprise an inner conductor162, an outer conductor165and a sleeve1111. The sleeve1111may be in contact with the outer conductor165of the coaxial cable1152. Thus, an opening of a radiation shielding may be closed advantageously by the feed line1152.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.11may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-10) and/or below (e.g.,FIG.12-20).

FIG.12shows a schematic view of an example of an antenna module. The antenna module1000may comprise a feed line1152and a non-conducting material1224with a base1231to fill the opening of the slot antenna. The base1231of the non-conducting material may form one side of the chassis, e.g., one side comprising the chassis part made of non-conducting material.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.12may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-11) and/or below (e.g.,FIG.13-20).

FIG.13shows a schematic view of an example of a radiation shielding arranged in an electronic device. The radiation shielding1330may comprise a metal element1333, two conducting gaskets1370,1371and an attaching structure1335, e.g., a screw boss, to connect the radiation shielding1330with the chassis. A slot antenna may be formed in a conducting part1310of the chassis, e.g., a lateral part, and may be covered by a supporting element1361of an antenna feed.

The electronic device comprises an antenna arranged in a lateral part of a chassis of the electronic device, an electronic circuitry and a radiation shielding1330arranged in the lateral part of the chassis and between the antenna and the electronic circuitry. The radiation shielding1330may be configured to shield the antenna from electromagnetic radiation emitted by the electronic circuitry.

The lateral part of the chassis may be an area besides an edge of the chassis. The lateral part may extend from an edge of the chassis to a distance from the edge of at most 2% (or at most 5% or at most 10% or at most 15%) of a width of the chassis. Thus, the radiation shielding1330may be arranged next to the slot antenna. By arranging the radiation shielding1330in a lateral part a material requirement for a radiation shielding1330may be reduced. A plate arranged in front of electronic circuitries of an electronic device may be omitted, because the radiation shielding1330may generate a space without electromagnetic signals from these circuitries in a lateral space of the electronic device. In this space the slot antenna may be arranged, which may result in a decreased material requirement for the radiation shielding1330.

The radiation shielding1330may partially enclose the slot antenna. For example, the radiation shielding1330may be in contact with the lateral part in which the slot antenna may be formed. For example, the radiation shielding1330may be in contact with the lateral part at two positions besides the slot antenna. A height of the radiation shielding1330may be identical to a height of the lateral part. Thus, the radiation shielding1330may enclose one side of the lateral part entirely. Thus, an electromagnetic signal generated in an inside of the chassis may be shielded by the radiation shielding1330resulting in a decreased electromagnetic signal intensity in the space formed by the radiation shielding1330.

The electronic device may further comprise at least one conducting gasket1370,1371arranged between the radiation shielding1330and a part of the chassis. For example, the conducting gasket1370,1371may be a part of the radiation shielding1330. A contact between the radiation shielding1330and the chassis may be improved by the conducting gasket1370,1371, which may lead to an increased shielding caused by the radiation shielding1330.

The electronic device may further comprise two conducting gaskets1370,1371arranged between the radiation shielding1330and a respective part of the chassis. The two conducting gaskets1370,1371may be arranged at opposite sides of the radiation shielding1330. For example, the two conducting gaskets1370,1371may be a part of the radiation shielding1330. A contact between the radiation shielding1330and the chassis may be improved by the two conducting gaskets1370,1371, which may lead to an increased shielding caused by the radiation shielding1330. A first conducting gasket1371may be in contact with a first chassis part (e.g., a part of a D-cover) and a second conducting gasket1370may be in contact with a second chassis part (e.g., a part of a C-cover).

The radiation shielding1330may be made of conducting material, e.g., metal.

The radiation shielding1330may be detachable from the electronic device. For example, the radiation shielding1330may be attached by use of the attaching structure1335, e.g., a screw, may be used to attach the radiation shielding1330to the chassis. Thus, an assembling process of the electronic device may be facilitated by first assembling a feed line and/or leading a feed line through the opening and then assembling the radiation shielding1330.

The electronic device may further comprise a feeding element. The feeding element may be arranged within a space1340formed by the radiation shielding1330around the antenna. The feeding element may be proximity coupled to the antenna.

The electronic device may further comprise a feed line coupled to the feeding element and passing through an opening1340in the radiation shielding1330. The feed line may be enclosed by a sleeve of conducting material that covers the opening1340in the radiation shielding1330.

The radiation shielding1330may have a U-shape. Thus, the radiation shielding1330may efficiently enclose one side of the slot antenna formed in a lateral part entirely.

FIG.13shows an internal structure with radiation shielding1330, e.g., a metal barricade. If an antenna may be placed in a chassis, e.g., a base of a laptop, RFI issue may occur. To mitigate the RFI issue, a shielding box may be used to cover sources of interference/noise sources. Such shielding box may be costly and may occupy space in the motherboard. So a simple cost-effective solution may be provided, by shielding the antenna with a metal cavity, e.g., a radiation shielding1330arranged in a lateral part of the electronic device. A discussion of the RFI issue is shown inFIG.14.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.13may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-12) and/or below (e.g.,FIG.14-20).

FIG.14ashows an example of an electronic device. To analysis a RFI issue, a radiation shielding1430and a microstrip line (noise source) are arranged in a distance d1444of d=150 mm in a chassis. The slot antenna1420may be arranged on a lateral part of the chassis.FIG.14bshows a simulation of a slot antenna performance for the electronic device ofFIG.14a. The simulation shows the S11-parameter in dB as a function of the frequency for a shielded1481(radiation shielding is used) slot antenna and an unshielded1482(no radiation shielding is used) slot antenna. A RFI/coupling may be reduced by ˜20 dB in all WLAN frequency bands for the usage of the radiation shielding. Thus, the radiation shielding may improve a performance of the slot antenna.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.4may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-13) and/or below (e.g.,FIG.15-20).

FIG.15show schematic views of different examples of a slot antenna.FIG.15ashows a G-shaped slot antenna fromFIGS.1,2,4a,7a,7b,10and12. A width1510of the base may be at least 20 mm, or at least 22 mm, or at least 24 mm and/or at most 30 mm, or at most 28 mm, or at most 26 mm. A width1511of the G-shaped slot antenna may be at least 9 mm, or at least 10 mm, or at least 11 mm and/or at most 14 mm, or at most 13 mm, or at most 12.2 mm. A distance1512from the G-shaped slot antenna to a chassis edge may be at least 2.1 mm, or at least 2.3 mm, or at least 2.5 mm and/or at most 3.1 mm, or at most 2.9 mm, or at most 2.7 mm. A height1513of the G-shaped may be at least 2.7 mm, or at least 2.9 mm, or at least 3.1 mm and/or at most 3.7 mm, or at most 3.5 mm, or at most 3.3 mm.

FIG.15show different shapes (pattern) of slot antennas implemented on a Z-edge of chassis. The slot shape (pattern) may be modified or customized based on design requirement and/or an industrial design of an electronic device. Slot shapes (pattern) like a G-Shape, a C-Shape or a L-Shape may be used for forming a slot antenna. The design may be suitable for any chassis edge such as a sloped edge or a curved edge of a chassis, e.g., for an edge of a D-cover. A sloped design may help improve the antenna efficiency by giving a plastic area (e.g., a base of the non-conducting material) of a D-cover some distance from a surface on which the electronic device may be placed. Also, the proposed design may be not limited to laptop form factors and may be adapted to any shape and size, i.e., round and other shapes of edges of the chassis.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.15may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-14) and/or below (e.g.,FIG.15-20).

FIG.16shows a side view of an example of an electronic device. The electronic device may have a footer1610(e.g., a rubber foot) at a base of the chassis, e. g a D-Cover1632. This footer1610may create a gap1620between a C-cover1631(in which a slot antenna may be arranged) to a surface on which the electronic device may be place. Thus, a performance of the slot antenna may be improved due to the gap1620, e.g., in a desk-mode. Further, an increased slot antenna performance may be achieved by utilizing different industrial designs of electronic devices. For example, electronic devices with curved or sloped D-Cover edges. A plastic cutout for a base of a non-conducting material and for slot antenna may be made in any surface of the chassis.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.16may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-15) and/or below (e.g.,FIG.16-20).

FIG.17shows simulations of an example of a slot antenna for an electronic device. The simulation is performed for a G-shaped slot antenna with a width of 12.2 mm and a height of 3.3 mm. Further, the simulation is performed with a radiation shielding and a full metal laptop base. For the simulation, the slot antenna is proximity coupled with a metal trace. The trace is formed on a FPC which is glued to an inner side of the chassis, e.g., of the z-edge, behind the slot antenna. The metal trace is coupled to the slot structure and a gap between them provides impedance matching and coupling strength between them. A slot in a D-cover has a width of 26 mm and a length of 3.5 mm and may provide a wider impedance bandwidth.

The slot antenna may be tuned for WLAN-6E frequency bands (2.4 GHz, 5 GHz and 6 GHz). The 2.4 GHz frequency band may be 2400 MHz-2500 MHz, the 5 GHz frequency band may be 5180 MHz-5825 MHz and the 6 GHz frequency band may be 5925 MHz-7125 MHz.

FIG.17ashows a simulation of a magnitude of a S11-parameter in dB as a function of the frequency. The return loss1700(S11-parameter in dB) of the slot antenna may be below −6 dB for both frequency bands, which indicates good impedance matching with 50Ω. The achieved return loss and impedance bandwidth may meet requirements of a WLAN-6E antenna. Thus, the proposed slot antenna may be used in an electronic device for WLAN-6E radiation.

FIG.17bshows a simulation of a slot antenna radiation efficiency in dB as a function of the frequency for 2.4-2.5 GHz. The antenna radiation efficiency1710may be below −3 dB. Thus, the proposed slot antenna may be used in an electronic device for WLAN-6E radiation.

FIG.17cshows a simulation of a slot antenna radiation efficiency in dB as a function of the frequency for 5.1-7.1 GHz. The antenna radiation efficiency1720may be below −5 dB. Thus, the proposed slot antenna may be used in an electronic device for WLAN-6E radiation.

FIG.17dshows a simulation of an antenna peak gain in dB as a function of the frequency for 2.4-2.5 GHz. The slot antenna peak gain may be below 0 dB. Thus, the proposed slot antenna may be used in an electronic device for WLAN-6E radiation.

FIG.17eshows a simulation of an antenna peak gain in dB as a function of the frequency for 5.1-7.1 GHz. The slot antenna peak gain may be below 4 dB. Thus, the proposed slot antenna may be used in an electronic device for WLAN-6E radiation.

FIGS.17f,17g, and17hshow a radiation pattern for ϕ=0° at 2.45 GHz1751, 5.5 GHz1752and 6.5 GHz1753, respectively. For example, for ϕ=0° a radiation pattern in a plane rectangular to a surface on which the electronic device may be placed may be simulated. For example, for ϕ=0° a radiation pattern in a plane parallel to the slot antenna may be simulated. The radiation patterns1751,1572,1753show an omni-directional radiation pattern. A significant decrease can not be seen for any radiation direction. Thus, the proposed slot antenna may be used in an electronic device for WLAN-6E radiation.

FIGS.17i,17j, and17kshow a radiation pattern for ϕ=90° at 2.45 GHz1754, 5.5 GHz1755and 6.5 GHz1756, respectively. For example, for ϕ=90° a radiation pattern in a plane rectangular to a surface on which the electronic device may be placed may be simulated. For example, for ϕ=90° a radiation pattern in a plane rectangular to the slot antenna may be simulated. The radiation patterns1753,1574,1755show an omni-directional radiation pattern. A significant decrease can not be seen for any radiation direction. Thus, the proposed slot antenna may be used in an electronic device for WLAN-6E radiation.

FIGS.17l,17m, and17nshow a radiation pattern for ϑ=90° at 2.45 GHz1754, 5.5 GHz1755and 6.5 GHz1756, respectively. For example, for ϑ=90° a radiation pattern in a plane parallel to a surface on which the electronic device may be placed may be simulated. The radiation patterns1756,1577,1758may show an omni-directional radiation pattern. A significant decrease can not be seen for any radiation direction. Thus, the proposed slot antenna may be used in an electronic device for WLAN-6E radiation.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.17may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-17) and/or below (e.g.,FIG.18-20).

FIG.18shows an example of an electronic device with two antennas. The two antenna1810,1811may be arranged on opposite sides of a chassis of the electronic device1800. The antenna1810,1811may by shielded by a radiation shielding each.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.18may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-17) and/or below (e.g.,FIG.18-20).

FIG.19shows a simulation of the electronic device with two antennas fromFIG.18. Two WLAN antennas may be required to support 2×2 multiple-in multiple-out (MIMO). Thus, an antenna-to-antenna isolation may be important for a better throughput. An antenna-to-antenna isolation may be improved by the proposed radiation shielding above. For the simulations shown inFIG.19two antenna are arranged on opposing sides of the chassis. A radiation shielding is arranged in a distance of 320 mm to each antenna.

FIG.19shows a simulation of a magnitude of a S12-parameter in dB as a function of the frequency with1910and without1920two radiation shieldings. For the usage of the two radiation shieldings a magnitude of the S12-parameter may be decreased. Especially in a higher frequency band (e.g., 5.15 GHz-7.125 GHz) the magnitude may be decreased by roughly 30 dB. Thus, two radiation shieldings may increase a performance of the two antennas. For example, an antenna to antenna may be improved by the two radiation shieldings.

More details and aspects are mentioned in connection with the examples described above and/or below. The example shown inFIG.19may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-18) and/or below (e.g.,FIG.19-20).

FIG.20shows simulations of an example of a slot antenna for an electronic device for different modes. The simulation is performed for a G-shaped slot antenna with a width of 12.2 mm and a height of 3.3 mm. Further, the simulation is performed with a radiation shielding and a full metal laptop base. For the simulation, the slot antenna is proximity coupled with a metal trace. The trace is formed on a FPC which is glued to an inner side of the chassis, e.g., of the z-edge, behind the slot antenna. The metal trace is coupled to the slot structure and a gap between them provides impedance matching and coupling strength between them. A slot in a D-cover has a width of 26 mm and a length of 3.5 mm and may provide a wider impedance bandwidth.

The antenna performance is validated for different operation modes as open lid-mode, close lid-mode and tablet-mode. An antenna designed only for open lid-mode may have a strong performance drop in close lid-mode and/or tablet-mode, because of shielding caused by a (metal) lid and/or display frame. An air gap between a display and a C-cover may be at most 0.6 mm in close lid-mode, whereas an air gap between lid and D-cover may be at most 2 mm in tablet-mode. Thus, the lid and/or the frame of the display may decrease an antenna performance. By arranging the antenna on a lateral part of the chassis the antenna performance may be improved. For example, the by arranging the antenna on a lateral part of the chassis an antenna performance may be less impacted by an operation mode.

FIG.20ashows a simulation of a S11-parameter in dB as a function of the frequency for closed lid-mode2010, open lid-mode2020(laptop-mode) and tablet-mode2030of the electronic device. The return-loss (S11-parameter in dB) may be for the frequency bands from 2 GHZ-5.5 GHz and 7 GHz-8 GHz roughly identical for all three operation modes. Further, the return-loss may be for open lid-mode2020and close lid-mode over the whole frequency band from 2 GHz-8 GHz nearly identical. Thus, the proposed antenna may be used in an electronic device for all operation modes.

FIG.20bshows a simulation of a slot antenna radiation efficiency in dB as a function of the frequency for 2.4-2.5 GHz. The antenna radiation efficiency may be below −3 dB for all three operation modes, namely for close lid-mode2011, open lid-mode2021and tablet-mode. Thus, the proposed slot antenna may be used in an electronic device for WLAN-6E radiation.

FIG.20cshows a simulation of a slot antenna radiation efficiency in dB as a function of the frequency for 5.1-7.1 GHz. The antenna radiation efficiency may be below −3 dB for all three operation modes, namely for close lid-mode2012, open lid-mode2022and tablet-mod 2032. Thus, the proposed slot antenna may be used in an electronic device for WLAN-6E radiation.

FIG.20dshows a simulation of an antenna peak gain in dB as a function of the frequency for 2.4-2.5 GHz. The slot antenna peak gain may be below 4 dB for all three operation modes, namely for close lid-mode2013, open lid-mode2023and tablet-mode2033. Thus, the proposed slot antenna may be used in an electronic device for WLAN-6E radiation.

FIG.20eshows a simulation of an antenna peak gain in dB as a function of the frequency for 5.1-7.1 GHz. The slot antenna peak gain may be below 5 dB for all three operation modes, namely for close lid-mode2013, open lid-mode2023and tablet-mode2033. Thus, the proposed slot antenna may be used in an electronic device for WLAN-6E radiation.

More details and aspects are mentioned in connection with the examples described above. The example shown inFIG.20may comprise one or more optional additional features corresponding to one or more aspects mentioned in connection with the proposed concept or one or more examples described above (e.g.,FIG.1-19).

The slot antenna proposed above may be suitable designed for WIFI-6E and placement in a base of a laptop. The chassis design may have a minimum plastic/non-conductive material in a metal chassis which can even be not visible. Hence, the system may have seamless metal chassis look.

The proposed radiation shielding arranged in a lateral part may omit a plate over noise sources (e.g., CPU, DDR) in a motherboard.

The slot antenna may used as antenna module. An electronic device may have an increased space for heat spread structure, because a plastic area may be reduced. The slot antenna and the radiation shielding may be integrated in the chassis, thus an assembly time may be reduced.

FIG.21illustrates a user device2100in accordance with an aspect. The user device2100may be a mobile device in some aspects and includes an application processor2105, baseband processor2110(also referred to as a baseband module), radio front end module (RFEM)2115, memory2120, connectivity module2125, near field communication (NFC) controller2130, audio driver2135, camera driver2140, touch screen2145, display driver2150, sensors2155, removable memory2160, power management integrated circuit (PMIC)2165and smart battery2170. A radiation shielding may be arranged in the user device2100, e.g., to shield a slot antenna against an electromagnetic signal of the application processor2105.

In some aspects, application processor2105may include, for example, one or more CPU cores and one or more of cache memory, low drop-out voltage regulators (LDOs), interrupt controllers, serial interfaces such as serial peripheral interface (SPI), inter-integrated circuit (I2C) or universal programmable serial interface module, real time clock (RTC), timer-counters including interval and watchdog timers, general purpose input-output (IO), memory card controllers such as secure digital/multi-media card (SD/MMC) or similar, universal serial bus (USB) interfaces, mobile industry processor interface (MIPI) interfaces and Joint Test Access Group (JTAG) test access ports.

The examples described herein may be summarized as follows:

Example 1 is a chassis for an electronic device, wherein the chassis comprises a chassis part made of conducting material, and at least one slot antenna is formed in the chassis part made of conducting material.

Example 2 is the chassis of example 1, wherein the at least one slot antenna is formed on a lateral part of the chassis.

Example 3 is the chassis according to any one of the preceding examples, wherein the at least one slot antenna is formed by an opening in the chassis part made of conducting material.

Example 4 is the chassis according to example 3, wherein the opening is filled with non-conducting material.

Example 5 is the chassis according to example 4, wherein the non-conducting material to fill the opening has a base, wherein the base is configured to improve an arrangement of the non-conducting material, and wherein the base is arranged in a second opening in the chassis.

Example 6 is the chassis according to any one of the preceding examples, wherein the chassis is entirely made of conducting material.

Example 7 is the chassis according to any one of the preceding examples, further comprising a radiation shielding configured to electromagnetically shield the slot antenna from an interior of the chassis.

Example 8 is the chassis according to example 7, further comprising at least one conducting gasket arranged between the radiation shielding and another part of the chassis.

Example 9 is the chassis according to any one of examples 7-8, further comprising two conducting gaskets arranged between the radiation shielding and a respective other part of the chassis, wherein the two conducting gaskets are arranged at opposite sides of the radiation shielding.

Example 10 is the chassis according to any one of the preceding examples, further comprising a second slot antenna formed in the chassis part made of conducting material or formed in an opposing chassis part made of conducting material, wherein the second slot antenna is arranged at a lateral part of the chassis opposite to the at least one slot antenna.

Example 11 is the chassis according to any one of the preceding examples, wherein the chassis comprises a first chassis part and a second chassis part connected to each other, the first chassis part is adapted for placing the chassis on a surface such that the first chassis part is arranged between the surface and the second chassis part, and the at least one slot antenna is formed in the second chassis part.

Example 12 is an electronic device, comprising: a chassis according to any of examples 1 to 11; and an antenna feed configured to excite the at least one slot antenna based on a feed signal.

Example 13 is the electronic device of example 12, wherein the antenna feed comprises an exciter, which is proximity coupled to the at least one slot antenna.

Example 14 is the electronic device according to any one of examples 12-13, wherein the antenna feed is formed on a printed circuit board or on a flexible printed circuit board.

Example 15 is the electronic device according to any one of examples 12-14, wherein the antenna feed comprises a feed line; and the feed line forms a short circuit or an open circuit.

Example 16 is the electronic device according to any one of examples 12-15, wherein the antenna feed comprises an impedance matching circuit.

Example 17 is the electronic device according to any one of examples 12-16, wherein the antenna feed comprises a feed line passing through an opening in a radiation shielding of the electronic device that electrically shields the slot antenna from an interior of the chassis, and the feed line is enclosed by a sleeve of conducting material that covers the opening in the radiation shielding.

Example 18 is the electronic device according to any one of examples 12-17, further comprising a conductive element attached to the antenna feed for grounding the antenna feed.

Example 19 is the electronic device according to any one of examples 12-18, wherein the antenna feed comprises at least one recess for facilitating bending of the antenna feed.

Example 20 is the electronic device according to any one of examples 12-19, wherein the antenna feed comprises at least one recess configured to receive an attaching element for attaching the antenna feed to the chassis.

Example 21 is the electronic device according to any one of examples 12-20, wherein the slot antenna comprises at least two slots adapted for transmitting and receiving at two different wavelengths.

Example 22 is the electronic device according to example any one of examples 12-21, wherein the antenna feed is arranged to excite the at least two slots at the same time.

Example 23 is the electronic device of any of examples 12-22, wherein the electronic device is a mobile device.

Example 24 is a method for fabricating an electronic device, comprising: forming an opening in a conducting part of a chassis of the electronic device to form a slot antenna; and

filling the opening with non-conducting material.

Example 25 is the method according to example 24, further comprising: arranging an antenna feed within the chassis such that the antenna feed and the slot antenna are proximity coupled.

Example 26 is the method according to example 25, further comprising: arranging a radiation shielding within the chassis such that the radiation shielding at least partially encloses the slot antenna and the antenna feed within the chassis in order to shield the slot antenna and the antenna feed from electromagnetic radiation emitted by other circuitry of the electronic device.

Example 27 is an antenna module for a portable electronic device, comprising: a chassis, comprising a chassis part made of conducting material and a chassis part made of non-conducting material, and wherein a slot antenna is formed in the chassis part made of conducting material; and an antenna feed arranged within the chassis and configured to excite the slot antenna based on a feed signal.

Example 28 is the antenna module according to example 27, wherein all sides of the chassis are made of conducting material except one side comprising the chassis part made of a non-conducting material.

Example 29 is the antenna module according to any one of examples 27-28, wherein the antenna module comprises an opening for a feed line coupled to the antenna feed.

Example 30 is the antenna module according to example 29, wherein the feed line is enclosed by a sleeve of conducting material that covers the opening in a radiation shielding.

Example 31 is a mobile device comprising the antenna module according to any one of examples 27-30.

Example 32 is an electronic device comprising: antenna arranged in a lateral part of a chassis of the electronic device; electronic circuitry; and a radiation shielding arranged in the lateral part of the chassis and between the antenna and the electronic circuitry, wherein the radiation shielding is configured to shield the antenna from electromagnetic radiation emitted by the electronic circuitry.

Example 33 is the electronic device according to example 32, further comprising: at least one conducting gasket arranged between the radiation shielding and a part of the chassis.

Example 34 is the electronic device according to any one of the examples 32-33, further comprising: two conducting gaskets arranged between the radiation shielding and a respective part of the chassis, wherein the two conducting gaskets are arranged at opposite sides of the radiation shielding.

Example 35 is the electronic device according to any one of the examples 32-34, wherein

the radiation shielding is made of conducting material.

Example 36 is the electronic device according to any one of the examples 32-35, wherein the radiation shielding is detachable from the electronic device.

Example 37 is the electronic device according to any one of the examples 32-36, further comprising: a feeding element, wherein the feeding element is arranged within a space formed by the radiation shielding around the antenna, wherein the feeding element is proximity coupled to the antenna.

Example 38 is the electronic device according to example 37, further comprising: a feed line coupled to the feeding element and passing through an opening in the radiation shielding, wherein the feed line is enclosed by a sleeve of conducting material that covers the opening in the radiation shielding.

Example 39 is the electronic device according to any one of the examples 32-38, wherein

the radiation shielding has a U-shape.

Example 40 is an antenna feed for exciting an antenna, comprising a first feed line; a second feed line; and a third feed line, wherein the third feed line connects the first feed line with the second feed line and the second feed line is longer as the first feed line.

Example 41 is the antenna feed according to example 40, further comprising a cable connected to the first feed line for receiving a feed signal.

Example 42 is the antenna feed according to any one of the examples 40-41, further comprising at least one impedance matching circuit arranged at an end region of the first feed line or the second feed line.

The following examples are hereby incorporated in the detailed description, wherein each example may stand on its own as a separate example. It should also be noted that although in the examples a dependent example refers to a particular combination with one or more other examples, other examples may also include a combination of the dependent example with the subject matter of any other dependent or independent example. Such combinations are hereby explicitly proposed, unless it is stated in the individual case that a particular combination is not intended. Furthermore, features of an example should also be included for any other independent example, even if that example is not directly defined as dependent on that other independent example.