CN212571353U - Antenna radiation unit and communication equipment - Google Patents

Abstract

The utility model provides an antenna radiation unit and communication equipment relates to smart antenna's technical field, and antenna radiation unit includes: the dielectric substrate is arranged at the top of the balun assembly, and the grounding piece is arranged at the bottom of the balun assembly; the dielectric substrate comprises a feed layer and a coupling layer, and the feed layer and the coupling layer are arranged on the opposite surfaces of the dielectric substrate; the feed layer is provided with a feed unit, the coupling layer is provided with a coupling unit, and the feed unit is partially overlapped with the corresponding area of the coupling unit to form a coupling area of the antenna radiation unit. The embodiment of the utility model provides an antenna radiation unit and communication equipment, through the coupling region who adjusts above-mentioned overlap portion, can realize that high frequency current normally passes through, restrain low frequency current simultaneously, this structure can also realize that high frequency unit common mode resonant frequency removes to the high frequency for resonant frequency falls in the low frequency work outband, thereby effectively reduces the influence to the low frequency radiation performance.

Description

Antenna radiation unit and communication equipment

Technical Field

The utility model belongs to the technical field of smart antenna's technique and specifically relates to an antenna radiation unit and communication equipment are related to.

Background

With the development of wireless communication, base station antennas develop towards multi-frequency and multi-system directions, but interference exists between different frequencies of multi-frequency antennas, which affects radiation performance and causes deterioration of directional diagram performance indexes, thereby reducing network performance.

In the conventional antenna, the interference is often reduced by increasing the distance between the high-frequency unit and the low-frequency unit, but the size of the antenna is larger, which is not beneficial to the installation and layout of the antenna, and another mode is that the high-frequency unit is made into a patch form, but the patch unit cannot realize ultra-wideband and can only realize a narrowband antenna, and the latest unit design removes common mode resonance outside a low-frequency working frequency band by adding a suppression circuit in a balun, but the method is often difficult to match and has higher loss.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides an antenna radiation unit and a communication device to alleviate the above technical problems.

In a first aspect, an embodiment of the present invention provides an antenna radiation unit, including: the grounding structure comprises a dielectric substrate, a balun component and a grounding piece; wherein the dielectric substrate is arranged at the top of the balun assembly, and the grounding sheet is arranged at the bottom of the balun assembly; the dielectric substrate comprises a feed layer and a coupling layer, wherein the feed layer and the coupling layer are arranged on the opposite surfaces of the dielectric substrate; the antenna comprises an antenna radiation unit, a feed layer and a coupling layer, wherein the feed layer is provided with a feed unit, the coupling layer is provided with a coupling unit, and the feed unit is partially overlapped with a region corresponding to the coupling unit to form a coupling region of the antenna radiation unit.

With reference to the first aspect, embodiments of the present invention provide a first possible implementation manner of the first aspect, wherein the feeding unit includes a preset number of feeding lines, and the coupling unit includes a preset number of coupling arms; the feeding line overlaps with the corresponding coupling arm portion to form a coupling region of the antenna radiation unit.

With reference to the first possible implementation manner of the first aspect, the present invention provides a second possible implementation manner of the first aspect, wherein the antenna radiation unit further includes a printed circuit disposed on the feed layer and the coupling layer; the printed circuit is used for tuning the radiation characteristic of the antenna radiation unit.

With reference to the second possible implementation manner of the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the printed circuit includes at least one first circuit disposed on the feed layer, and a second circuit disposed on the coupling layer and electrically connected to the corresponding first circuit; the number of the second lines is also matched with the number of the coupling arms, and each second line is electrically connected with the corresponding coupling arm.

With reference to the third possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, wherein the dielectric substrate is further provided with at least one metal via, and the first line and the corresponding second line are electrically connected through the metal via.

With reference to the third possible implementation manner of the first aspect, the present invention provides a fifth possible implementation manner of the first aspect, wherein the at least one first line is disposed at an edge position of the feed layer; the feed line is arranged at the central position of the feed layer, a through hole matched with the balun assembly is further formed in a feed area formed on the feed layer by the feed line, and the through hole is used for fixing the dielectric substrate and the balun assembly.

With reference to the first aspect, embodiments of the present invention provide a sixth possible implementation manner of the first aspect, where the balun assembly includes at least two dielectric sheets, and at least two of the dielectric sheets are nested.

With reference to the sixth possible implementation manner of the first aspect, the present invention provides a seventh possible implementation manner of the first aspect, wherein the dielectric sheet includes a signal line and a ground line, and the signal line and the ground line are respectively disposed on two opposite surfaces of the dielectric sheet; wherein one end of the signal line is input through the bottom feed of the balun component, and the other end of the signal line is coupled to the ground line; one end of the ground wire is connected with the grounding sheet arranged at the bottom of the balun component, and the other end of the ground wire is connected with the feed unit.

With reference to the seventh possible implementation manner of the first aspect, the present invention provides an eighth possible implementation manner of the first aspect, wherein the grounding plate includes a grounding dielectric plate, and a grounding layer disposed at a bottom of the grounding dielectric plate; wherein the bottom of the grounding dielectric sheet is a surface far away from the balun component; when the grounding sheet is arranged at the bottom of the balun assembly, the grounding wire penetrates through the grounding medium sheet to be connected with the grounding layer so as to form a common grounding structure with the grounding sheet.

In a second aspect, the embodiments of the present invention further provide a communication device, which is provided with the antenna radiation unit of the first aspect.

The embodiment of the utility model provides a following beneficial effect has been brought:

the antenna radiation unit and the communication device provided by the embodiment of the utility model form the antenna radiation unit by arranging the dielectric substrate at the top of the balun component and arranging the grounding piece at the bottom of the balun component, the dielectric substrate comprises a feed layer and a coupling layer, the feed layer and the coupling layer are arranged on the opposite surfaces of the dielectric substrate, the feed layer is also provided with a feed unit, the coupling layer is also provided with a coupling unit, the feed unit is partially overlapped with the corresponding area of the coupling unit to form a coupling area of the antenna radiation unit, by adjusting the coupling area of the overlapping part, the normal passing of high-frequency current can be realized, and the low-frequency current can be restrained, and at the same time, the structure can also realize that the common mode resonance frequency of the high-frequency unit moves towards high frequency, so that the resonance frequency falls outside a low-frequency working band, and the influence on the low-frequency radiation performance is effectively reduced.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an antenna radiation unit according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another antenna radiation unit according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a feed layer according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a coupling layer according to an embodiment of the present invention;

fig. 5 is a schematic diagram of an equivalent circuit of an antenna radiation unit according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a dielectric sheet according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another dielectric sheet according to an embodiment of the present invention.

Icon: 100-a dielectric substrate; 101-a balun component; 102-a ground pad; 103-a feeding unit; 104-a coupling unit; 301-a feeder line; 302-a first line; 303-metal vias; 304-a via; 402-a coupling arm; 403-a second line; 601-a first nesting groove; 602-a second nesting groove; 603-upward bulge; 604-downward projection; 605-signal line.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

Currently, the low frequency band of the multi-frequency antenna may include a GSM900 band operating at 880-960MHz, the low frequency band may further include an 800M band operating at 790-880MHz and a 700M band operating at 694-790MHz, and the high frequency band of the multi-frequency antenna may include a GSM1800 band operating at 1710-1880MHz, a UMTS band operating at 1920-2170MHz, and an LTE2600M band operating at 2500-2700 MHz.

In the antennas of the above-mentioned frequency bands, the single-side radiating arm and balun size of the high-frequency unit is equivalent to about one-quarter wavelength of the low-frequency band, and can be equivalent to a low-frequency monopole antenna, which may generate low-frequency band common mode resonance and interfere with the radiation performance of the low-frequency unit. In the conventional antenna, the interference is often reduced by increasing the distance between the high-frequency unit and the low-frequency unit, but the size of the antenna is larger, which is not beneficial to the installation and layout of the antenna, and another mode is that the high-frequency unit is made into a patch form, but the patch unit cannot realize ultra-wideband and can only realize a narrowband antenna, and the latest unit design removes common mode resonance outside a low-frequency working frequency band by adding a suppression circuit in a balun, but the method is often difficult to match and has higher loss. Based on this, the embodiment of the utility model provides an antenna radiation unit and communication equipment can effectively alleviate above-mentioned problem.

For the convenience of understanding the present embodiment, an antenna radiation unit disclosed in the embodiments of the present invention will be described in detail first.

In a possible implementation manner, an embodiment of the present invention provides an antenna radiation unit, as shown in fig. 1, a schematic structural diagram of the antenna radiation unit, including: a dielectric substrate 100, a balun assembly 101 and a grounding piece 102; wherein the dielectric substrate 100 is disposed on the top of the balun assembly 101, and the grounding plate 102 is disposed on the bottom of the balun assembly 101.

Specifically, the dielectric substrate 100 includes a feed layer and a coupling layer, which are disposed on opposite surfaces of the dielectric substrate; the feed layer is provided with a feed unit, the coupling layer is provided with a coupling unit, and the feed unit is partially overlapped with the corresponding area of the coupling unit to form a coupling area of the antenna radiation unit.

For convenience of understanding, fig. 2 shows a schematic structural diagram of another antenna radiation element, wherein fig. 2 shows views of the antenna radiation element in fig. 1 from different viewing angles, and for convenience of explanation, a feeding layer is disposed on an upper surface of a dielectric substrate, and a coupling layer is disposed on a lower surface of the dielectric substrate, wherein fig. 1 shows a feeding element disposed on the upper surface of the dielectric substrate, i.e., a feeding element 103 shown by a dashed box, and fig. 2 shows a coupling element 104 of the coupling layer on the lower surface of the dielectric substrate.

In specific implementation, as shown in fig. 1 and fig. 2, the region where the feeding unit 103 is located on the upper surface of the dielectric substrate and the region where the coupling unit 104 is located on the lower surface of the dielectric substrate, which are shown by the dashed-line frames, are partially overlapped, the size of the overlapped region may be determined according to the design requirements of the antenna radiation unit, and from the tuning angle of the antenna, the overlapped region may be equivalent to a capacitor structure, the size of the area of the overlapped region is adjusted to control the size of the capacitor, so that normal passing of high-frequency current can be realized, and low-frequency current is suppressed. Furthermore, the structure that the feed unit and the coupling unit are partially overlapped can also realize that the common mode resonance frequency of the high-frequency unit moves to high frequency, so that the resonance frequency falls outside a low-frequency working band, and the influence on the low-frequency radiation performance is effectively reduced.

Therefore, the antenna radiation unit provided by the embodiment of the present invention is formed by disposing the dielectric substrate on the top of the balun component and disposing the grounding plate on the bottom of the balun component, the dielectric substrate comprises a feed layer and a coupling layer, the feed layer and the coupling layer are arranged on the opposite surfaces of the dielectric substrate, the feed layer is also provided with a feed unit, the coupling layer is also provided with a coupling unit, the feed unit is partially overlapped with the corresponding area of the coupling unit to form a coupling area of the antenna radiation unit, by adjusting the coupling area of the overlapping part, the normal passing of high-frequency current can be realized, and the low-frequency current can be restrained, and at the same time, the structure can also realize that the common mode resonance frequency of the high-frequency unit moves towards high frequency, so that the resonance frequency falls outside a low-frequency working band, and the influence on the low-frequency radiation performance is effectively reduced.

In practical use, the feed unit comprises a preset number of feed lines, and the coupling unit comprises a preset number of coupling arms; the overlap region corresponds to a portion of the feed line overlapping the area of the coupling arm, i.e. the feed line overlaps the corresponding coupling arm portion to form the coupling region of the antenna radiating element.

For convenience of understanding, the feeding unit includes 4 feeding lines, the coupling unit includes 4 coupling arms, and fig. 3 further illustrates a structural schematic diagram of a feeding layer, and fig. 4 further illustrates a structural schematic diagram of a coupling layer.

Fig. 3 is a top view of a feed layer, specifically, a top view of the upper surface of the dielectric substrate 100, as shown in fig. 3, including 4 feed lines 301; fig. 4 shows a top view of a coupling layer, in particular, the lower surface of the dielectric substrate 100, which, as shown in fig. 4, comprises 4 coupling arms 402.

In practical use, the total length of the monolithic feeder line shown in fig. 3 and the corresponding coupling arm in fig. 4 is about one-quarter wavelength of a preset high frequency, and the feeder line and the coupling arm are combined in pairs to form half-wave oscillators, so that normal radiation of the high frequency is realized.

It should be understood that, in fig. 3 and fig. 4, the dielectric substrate is illustrated as a square, and the feeder line and the coupling arm are uniformly arranged on the respective surfaces, so as to form the above-mentioned partially overlapped structure, while in other embodiments, the shape of the dielectric substrate may also be in other forms, such as rectangle, circle, polygon or other shapes, and the number of feeder lines and coupling arms and the arrangement on the surface of the dielectric substrate may also be set according to the actual use situation, which is not limited by the embodiment of the present invention.

Furthermore, the antenna radiation unit provided by the embodiment of the utility model also comprises a printed circuit arranged on the feed layer and the coupling layer; the printed wiring is used to tune the radiation characteristics of the antenna radiating element.

Specifically, the printed circuit comprises at least one first circuit arranged on the feed layer and a second circuit arranged on the coupling layer and electrically connected with the corresponding first circuit; the number of the second lines is also matched with the number of the coupling arms, and each second line is electrically connected with the corresponding coupling arm.

Furthermore, the dielectric substrate is also provided with at least one metal through hole, and the first circuit and the corresponding second circuit are electrically connected through the metal through hole.

For ease of understanding, schematic diagrams of the first line, the second line and the metal via are also shown in fig. 3 and 4, respectively, specifically, the first line 302 as shown in fig. 3, and the second line 403 as shown in fig. 4, and the metal via 303 in fig. 3 and 4.

Specifically, first circuit 302 is established at the feed layer, promptly the utility model discloses the upper surface of dielectric substrate in the embodiment, second circuit 403 sets up at the coupling layer, promptly, the utility model discloses the lower surface of dielectric substrate in the embodiment to, the quantity of first circuit is unanimous with the quantity of feeder circuit, as shown in fig. 3, makes every feeder circuit all correspond to there is first circuit, and likewise, the quantity of second circuit is also unanimous with the quantity of coupling arm, and, as shown in fig. 4, the end of every coupling arm all is connected with the second circuit.

In practical use, the printed circuit can be realized by a thin bent line, the second circuit, the metal via hole and the first circuit connected to the tail end of the coupling arm form an extension structure of the coupling arm, wherein the second circuit formed by the bent line can be equivalent to an inductance structure, a low-frequency section of a high frequency can be allowed to normally pass, and a suppression function is formed for a high-frequency section of the high frequency, so that a relatively lower frequency band in a high-frequency pass band has a longer current path than a relatively higher frequency band through the structure, the whole frequency band has almost equal electrical length, and further, the gain and the wave width characteristics of the high-frequency and low-frequency sections in the high-frequency pass band can be stabilized.

Further, fig. 5 also shows an equivalent circuit schematic diagram of an antenna radiation unit, where a capacitor C represents an equivalent capacitor structure in an overlapping area, and an inductor L represents an equivalent inductor structure in a second line, and common mode rejection can be achieved and stable radiation characteristics in a wide frequency band can be achieved by loading the distributed capacitors and inductors.

In practical use, as shown in fig. 3, the at least one first line is disposed at an edge position of the feed layer; the feed line is arranged at the center of the feed layer, and a through hole matched with the balun component is further formed in a feed area formed on the feed layer by the feed line and used for fixing the dielectric substrate and the balun component. Specifically, as shown in fig. 3 and 4, the size of the via 304 matches the size of the balun component, so as to fix the dielectric substrate and the balun component.

Further, the balun assembly comprises at least two medium sheets, and the at least two medium sheets are nested. Specifically, fig. 6 shows a schematic structural diagram of one media sheet, fig. 7 shows a schematic structural diagram of another media sheet, and for convenience of understanding, the present invention is described in an embodiment of the present invention by taking an example of forming a balun assembly by orthogonally nesting two media sheets, specifically, fig. 6 shows a schematic structural diagram of a first media sheet, which is provided with a first nesting groove 601, fig. 7 shows a second media sheet, which is provided with a second nesting groove 602, and the first media sheet and the second media sheet are nested together by the first nesting groove 601 and the second nesting groove 602 to form the balun assembly.

Further, both ends of the first dielectric sheet and the second dielectric sheet are provided with a protrusion, as shown in fig. 6 and 7, an upward protrusion 603 provided at the top end of the dielectric sheet is used for fixedly connecting the balun assembly with the dielectric substrate, and a downward protrusion 604 provided at the bottom of the dielectric sheet is used for fixedly connecting the balun assembly with the ground plate.

Further, the dielectric sheet further comprises a signal line and a ground line, which are respectively disposed on two opposite surfaces of the dielectric sheet; in fig. 6 and 7, front views corresponding to surfaces on which signal lines are located are shown, and thus, signal lines 605 are also shown in fig. 6 and 7.

Specifically, one end of the signal line is input through the bottom feed of the balun component, and the other end of the signal line is coupled to the ground line; one end of the ground wire is connected with the grounding sheet arranged at the bottom of the balun component, and the other end of the ground wire is connected with the feed unit. Specifically, the ground trace is typically in the form of a central slot, and the bottom of the ground trace is connected to the ground pad along with a downward projection 604 on the bottom of the dielectric pad, and the top of the ground trace is connected to the feed line of the feed layer along with the dielectric pad through the dielectric substrate.

Further, the grounding sheet comprises a grounding medium sheet and a grounding layer arranged at the bottom of the grounding medium sheet; the bottom of the grounding dielectric sheet is a surface far away from the balun component;

when the grounding plate is arranged at the bottom of the balun assembly, the ground wire of the dielectric plate of the balun assembly penetrates through the grounding dielectric plate to be connected with the grounding layer so as to form a common ground structure with the grounding plate.

It should be understood that, in the embodiment of the present invention, the balun assembly is formed by two orthogonally nested dielectric sheets as an example, therefore, the number of the via holes 304 for fixing the dielectric substrate and the balun assembly shown in fig. 3 and fig. 4 is also set by taking two dielectric sheets as an example, in other embodiments, the number of the dielectric sheets, and the protruding portion on the dielectric sheet may also be set according to the actual use condition, which is not limited by the embodiment of the present invention.

On the basis of the above embodiment, the embodiment of the utility model provides a communication equipment is still provided, specifically, this communication equipment is provided with above-mentioned antenna radiating element.

The embodiment of the utility model provides a communication equipment, the antenna radiation unit who provides with above-mentioned embodiment has the same technical characteristic, so also can solve the same technical problem, reaches the same technological effect.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the communication device described above may refer to the corresponding process in the foregoing embodiment, and is not described herein again.

In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An antenna radiating element, comprising: the grounding structure comprises a dielectric substrate, a balun component and a grounding piece;

wherein the dielectric substrate is arranged at the top of the balun assembly, and the grounding sheet is arranged at the bottom of the balun assembly;

the dielectric substrate comprises a feed layer and a coupling layer, wherein the feed layer and the coupling layer are arranged on the opposite surfaces of the dielectric substrate;

the antenna comprises an antenna radiation unit, a feed layer and a coupling layer, wherein the feed layer is provided with a feed unit, the coupling layer is provided with a coupling unit, and the feed unit is partially overlapped with a region corresponding to the coupling unit to form a coupling region of the antenna radiation unit.

2. The antenna radiating element of claim 1, wherein the feed element comprises a preset number of feed lines, and the coupling element comprises a preset number of coupling arms;

the feeding line overlaps with the corresponding coupling arm portion to form a coupling region of the antenna radiation unit.

3. The antenna radiating element of claim 2, further comprising a printed wiring disposed on the feed layer and the coupling layer;

the printed circuit is used for tuning the radiation characteristic of the antenna radiation unit.

4. The antenna radiating element of claim 3, wherein the printed wiring includes at least one first wiring disposed in the feed layer, and a second wiring disposed in the coupling layer and electrically connected to the corresponding first wiring;

the number of the second lines is also matched with the number of the coupling arms, and each second line is electrically connected with the corresponding coupling arm.

5. The antenna radiating element according to claim 4, wherein the dielectric substrate is further provided with at least one metal via, and the first line and the corresponding second line are electrically connected through the metal via.

6. The antenna radiating element according to claim 4, wherein at least one of the first lines is disposed at an edge position of the feed layer;

the feed line is arranged at the central position of the feed layer, a through hole matched with the balun assembly is further formed in a feed area formed on the feed layer by the feed line, and the through hole is used for fixing the dielectric substrate and the balun assembly.

7. The antenna radiating element of claim 1, wherein the balun assembly includes at least two dielectric sheets, at least two of the dielectric sheets being nested.

8. The antenna radiating element of claim 7, wherein the dielectric sheet includes a signal line and a ground line, the signal line and the ground line being respectively disposed on two opposite surfaces of the dielectric sheet;

wherein one end of the signal line is input through the bottom feed of the balun component, and the other end of the signal line is coupled to the ground line;

one end of the ground wire is connected with the grounding sheet arranged at the bottom of the balun component, and the other end of the ground wire is connected with the feed unit.

9. The antenna radiating element of claim 8, wherein the ground patch comprises a ground dielectric patch, and a ground layer disposed on a bottom portion of the ground dielectric patch; wherein the bottom of the grounding dielectric sheet is a surface far away from the balun component;

when the grounding sheet is arranged at the bottom of the balun assembly, the grounding wire penetrates through the grounding medium sheet to be connected with the grounding layer so as to form a common grounding structure with the grounding sheet.

10. A communication device, characterized in that it is provided with an antenna radiation element according to any of claims 1-9.

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