CN214313520U

CN214313520U - Antenna, oscillator and radiation structure

Info

Publication number: CN214313520U
Application number: CN202023277260.3U
Authority: CN
Inventors: 郭成; 陈宏亮
Original assignee: South China University of Technology SCUT; Comba Telecom Technology Guangzhou Ltd
Current assignee: South China University of Technology SCUT; Comba Telecom Technology Guangzhou Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-09-28
Anticipated expiration: 2030-12-29

Abstract

The utility model relates to an antenna, oscillator and radiation structure, radiation structure include dielectric-slab, first coupling part, second coupling part and radiation module. Wherein the dielectric plate is provided with a radiation surface. The first coupling piece is arranged on the radiation surface. The second coupling piece is arranged on the radiation surface, the second coupling piece and the first coupling piece are arranged at intervals, and the second coupling piece and the first coupling piece are enclosed to form a coupling area. The radiation assembly is arranged on the radiation surface and in the coupling area, and the radiation assembly, the first coupling piece and the second coupling piece are arranged at intervals and are in coupling fit. In the process that the feed structure feeds the radiation component, the radiation component is matched with the first coupling piece and the second coupling piece in a coupling mode, so that coupling current can be generated on the first coupling piece and the second coupling piece, the electrical length of the radiation structure is increased, the bandwidth can be effectively expanded, the gain is improved, and the radiation performance of the oscillator is improved.

Description

Antenna, oscillator and radiation structure

Technical Field

The utility model relates to a mobile communication technology field especially relates to an antenna, oscillator and radiation structure.

Background

Due to the rapid development of mobile communication technology, the use performance of the antenna is further improved. In order to meet the requirements of high capacity, high speed and low delay, the antenna integrates a plurality of oscillators arranged in an array. In the use process of the traditional oscillator, the radiation performances such as bandwidth, gain and the like are poor.

SUMMERY OF THE UTILITY MODEL

Accordingly, it is necessary to provide an antenna, a resonator, and a radiation structure for solving the problem of poor radiation performance such as bandwidth and gain.

The technical scheme is as follows:

in one aspect, a radiating structure is provided, comprising:

the dielectric plate is provided with a radiation surface;

a first coupling element disposed at the radiating surface;

the second coupling piece is arranged on the radiation surface, arranged opposite to the first coupling piece at intervals and enclosed into a coupling area; and

the radiation assembly is arranged on the radiation surface and in the coupling area, and the radiation assembly, the first coupling piece and the second coupling piece are arranged at intervals and are in coupling fit.

In the radiation structure and the feeding structure of the embodiment, in the process of feeding the radiation component, the radiation component is coupled and matched with the first coupling piece and the second coupling piece, so that coupling current can be generated on the first coupling piece and the second coupling piece, the electrical length of the radiation structure is increased, the bandwidth can be effectively expanded, the gain is improved, and the radiation performance of the oscillator is improved.

The technical solution is further explained below:

in one embodiment, the dielectric plate further has a back surface disposed opposite to the radiation surface, the radiation structure further includes a third coupling member disposed on the back surface, and the third coupling member is coupled with the first coupling member and the second coupling member.

In one embodiment, a first bending portion is arranged at an end portion, close to the second coupling piece, of the first coupling piece, a second bending portion is arranged at an end portion, close to the first coupling piece, of the second coupling piece, a third coupling piece is arranged corresponding to the first bending portion and the second bending portion, and the third coupling piece is in coupling fit with the first bending portion and the second bending portion.

In one embodiment, the first bending portion includes a first bending section disposed toward the radiation assembly and a second bending section disposed away from the second coupling member, and the first bending section and the second bending section are coupled to the third coupling member; and/or the second bending part comprises a third bending section and a fourth bending section, wherein the third bending section faces towards the radiation assembly and the fourth bending section faces away from the first coupling piece in the direction, and the third bending section and the fourth bending section are matched with the third coupling piece in a coupling mode.

In one embodiment, the first coupling member and the second coupling member are symmetrically disposed about a central axis of the dielectric plate.

In one embodiment, the radiation assembly includes four radiators arranged at intervals, the four radiators cooperate to form two orthogonally polarized dipoles, and each radiator is provided with a hollow-out groove.

In one embodiment, the radiation assembly further includes a connector for connecting two adjacent radiators.

In one embodiment, two adjacent radiators are spaced apart from each other to form a gap, the connector includes a third bent portion disposed in the gap, and a connecting portion for connecting the third bent portion and the radiators, and the connecting portion is disposed on an outer side of the radiators.

In another aspect, a resonator is provided, which includes a feeding structure and the radiating structure, wherein the feeding structure is used for feeding the radiating component.

The oscillator of the embodiment can effectively expand the bandwidth and improve the gain, so that the radiation performance of the oscillator is improved.

In another aspect, an antenna is provided, which includes the above-mentioned element.

The antenna of the embodiment can effectively expand the bandwidth, improve the gain and have good radiation performance; the assembly space can be effectively saved, and the space utilization rate is improved; the crosstalk between circuits can be effectively reduced, and the isolation of the radiation component is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

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

Fig. 1 is a schematic structural diagram of a vibrator according to an embodiment;

FIG. 2 is a top view of the transducer of FIG. 1;

FIG. 3 is a bottom view of the transducer of FIG. 1;

FIG. 4 is a graph of standing wave results for an antenna including the element of FIG. 1;

FIG. 5 is a graph of isolation results for an antenna including the element of FIG. 1;

fig. 6 is a graph of gain results for an antenna including the element of fig. 1.

Description of reference numerals:

10. the antenna comprises a radiation structure, 100, a dielectric slab, 110, a radiation surface, 120, a back surface, 130, a central axis, 210, a first coupling piece, 211, a first bending portion, 2111, a first bending section, 2112, a second bending section, 220, a second coupling piece, 221, a second bending portion, 2211, a third bending section, 2212, a fourth bending section, 230, a coupling region, 240, a third coupling piece, 300, a radiation assembly, 310, a radiator, 311, a hollow-out slot, 320, a gap, 330, a connecting body, 331, a third bending portion, 332, a connecting portion, 20 and a feed structure.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

As shown in fig. 1 to 3, in one embodiment, there is provided a vibrator including a feeding structure 20 and a radiating structure 10. Wherein the feeding structure 20 is used for feeding the radiating component. In this manner, the radiation element of the radiation structure 10 is fed by the feed structure 20, so that an electrical signal is transmitted to the radiation element and finally radiated out through the radiation element.

The feeding structure 20 may be any existing element capable of feeding the radiation component, for example, the feeding structure 20 may be in the form of a feeding balun, may also feed the radiation component through a coaxial cable, may also feed the radiation component through a feeding strip line, and only needs to stably and reliably transmit an electrical signal to the radiation component. Since the feeding structure 20 does not belong to the improvement focus of the present invention, the detailed structure can refer to the prior art and is not described herein.

As shown in fig. 1 and 2, in one embodiment, the radiation structure 10 includes a dielectric plate 100, a first coupling member 210, a second coupling member 220, and a radiation element 300. Wherein the dielectric plate 100 is provided with a radiation surface 110. The first coupling member 210 is etched, sputtered, or otherwise adhered to the radiating surface 110. The second coupling member 220 is disposed on the radiation surface 110 by etching, plating or adhering, the second coupling member 220 is spaced apart from the first coupling member 210, and the second coupling member 220 and the first coupling member 210 enclose a coupling region 230. The radiation element 300 is disposed on the radiation surface 110 and in the coupling region 230 by etching, plating, or adhering, and the radiation element 300 is disposed at an interval with the first coupling element 210 and the second coupling element 220 and coupled with each other.

In the radiation structure 10 and the feeding structure 20 of the embodiment, in the process of feeding the radiation element 300, the radiation element 300 is coupled with the first coupling element 210 and the second coupling element 220, so that coupling currents can be generated on the first coupling element 210 and the second coupling element 220, the electrical length of the radiation structure 10 is increased, the bandwidth can be effectively expanded, the gain is improved, and the radiation performance of the oscillator is improved.

It should be noted that the second coupling element 220 and the first coupling element 210 enclose a coupling region 230, the outline of which may be square, circular or other shapes, and it is only necessary that after the radiation assembly 300 is disposed in the coupling region 230, the radiation assembly 300 can be coupled and matched with both the first coupling element 210 and the second coupling element 220.

The first coupling element 210 and the second coupling element 220 may be in the form of a strip, a sheet, or other forms, and only need to be capable of coupling with the radiation assembly 300. The first coupling element 210 and the second coupling element 220 may be one or more segments, and only need to enclose the coupling region 230 for mounting the radiation assembly 300. Meanwhile, since the first coupling member 210 and the second coupling member 220 are oppositely spaced, the coupling region 230 is a non-closed region.

As shown in fig. 2 and 3, the dielectric plate 100 is further provided with a back surface 120 disposed opposite to the radiation surface 110. The radiation structure 10 further comprises a third coupling element 240, wherein the third coupling element 240 is etched, plated or adhered on the back surface 120, and the third coupling element 240 is coupled with the first coupling element 210 and the second coupling element 220. Therefore, the third coupling element 240 is coupled with the first coupling element 210 and the second coupling element 220, so that the third coupling element 240 can generate coupling current, the electrical length of the radiation structure 10 is further increased, the bandwidth can be effectively expanded, the gain is improved, and the radiation performance of the oscillator is improved. In addition, on the premise of ensuring the radiation performance, the size of the vibrator can be designed to be smaller, so that the use requirements of miniaturization and light weight are met; the height of the vibrator is about 15mm, the section height is about 0.12 lambda (lambda is the wavelength of the central frequency point of the vibrator), the height of the vibrator is smaller than that of the traditional quarter-wavelength vibrator, the structural design of a low section is achieved, the assembly space can be effectively saved, the space utilization rate is improved, and the integrated arrangement of the vibrator is facilitated.

Similarly, the third coupling element 240 may be a strip, a sheet, or other form, and only needs to be able to couple and cooperate with the first coupling element 210 and the second coupling element 220.

As shown in fig. 1, further, the end of the first coupling member 210 near the second coupling member 220 is provided with a first bending portion 211. Therefore, the end of the first coupling element 210 is bent, the length of the first coupling element 210 is prolonged, the electrical length of the radiation structure 10 is increased, the bandwidth can be expanded, and the gain can be improved. The second coupling member 220 is provided with a second bending part 221 at an end portion thereof adjacent to the first coupling member 210. Thus, the length of the second coupling element 220 is extended, the electrical length of the radiation structure 10 is increased, the bandwidth can be expanded, and the gain can be improved. The third coupling element 240 is disposed corresponding to the first bending portion 211 and the second bending portion 221, and the third coupling element 240 is coupled with both the first bending portion 211 and the second bending portion 221. In this way, the area of the third coupling element 240 can be designed to be large, so that the third coupling element 240 is in surface coupling with the first coupling element 210 and the second coupling element 220, the electrical length of the radiation structure 10 is further increased, the bandwidth can be expanded, and the gain can be improved.

As shown in fig. 2 and 3, in one embodiment, the first bending portion 211 includes a first bending section 2111 disposed toward the radiation assembly 300 and a second bending section 2112 disposed away from the second coupling member 220. In this way, the first bending section 2111 is bent toward the coupling region 230, and the second bending section 2112 is bent toward a direction away from the second coupling piece 220, so that the area of the projection region of the first coupling piece 210 on the dielectric plate 100 is small, which is beneficial to the miniaturization design of the oscillator structure. The first and second

bent sections

2111 and 2112 are coupled to the third coupling element 240. Therefore, the third coupling element 240 and the first coupling element 210 are guaranteed to realize surface coupling, the electrical length of the radiation structure 10 is increased, the bandwidth can be expanded, and the gain is improved.

Among them, the first bending section 2111 is preferably disposed perpendicular to the first coupling member 210, and the second bending section 2112 is preferably disposed perpendicular to the first bending section 2111, so that the first bending portion 211 occupies a small volume.

As shown in fig. 2 and 3, in one embodiment, the second bending portion 221 includes a third bending section 2211 disposed toward the radiation assembly 300 and a fourth bending section 2212 disposed away from the first coupling member 210. Therefore, the third bending section 2211 is bent towards the coupling region 230, and the fourth bending section 2212 is bent towards the direction away from the first coupling piece 210, so that the area of the projection region of the second coupling piece 220 on the dielectric board 100 is smaller, which is beneficial to the miniaturization design of the oscillator. And, the third and

fourth bending sections

2211 and 2212 are coupled and matched with the third coupling piece 240. Therefore, the third coupling element 240 and the second coupling element 220 are guaranteed to realize surface coupling, the electrical length of the radiation structure 10 is increased, the bandwidth can be expanded, and the gain is improved.

Here, the third bending section 2211 is preferably disposed perpendicular to the second coupling member 220, and the fourth bending section 2212 is preferably disposed perpendicular to the third bending section 2211, so that the second bending portion 221 occupies a small volume.

As shown in fig. 2 and 3, of course, in other embodiments, the first bending portion 211 may include a first bending section 2111 disposed toward the radiation assembly 300 and a second bending section 2112 disposed away from the second coupling component 220; meanwhile, the second bending part 221 includes a third bending section 2211 disposed toward the radiation assembly 300 and a fourth bending section 2212 disposed toward a direction away from the first coupling member 210. And the first bending section 2111, the second bending section 2112, the third bending section 2211 and the fourth bending section 2212 are coupled and matched with the third coupling piece 240. Therefore, the structure of the vibrator is more miniaturized; in addition, the electrical length of the radiation structure 10 is increased, so that the bandwidth can be expanded, and the gain can be improved.

As shown in fig. 2, the first coupling member 210 and the second coupling member 220 may be alternatively disposed symmetrically with respect to the central axis 130 of the dielectric plate 100. Thus, the radiation structure 10 is more compact, the projection area of the radiation structure 10 on the reflection plate can be reduced, and the vibrator is further miniaturized.

As shown in fig. 2, specifically, the first bent section 2111 and the third bent section 2211 are disposed symmetrically with respect to the central axis 130 of the dielectric sheet 100; the second bending section 2112 and the fourth bending section 2212 are symmetrically arranged about the central axis 130 of the dielectric plate 100, so that the first coupling piece 210 and the second coupling piece 220 have the same structure, the production or the processing is convenient, and the production or the processing cost is saved.

As shown in fig. 1 and fig. 2, in any of the above embodiments, the radiation assembly 300 includes four radiators 310 arranged at intervals. The four radiators 310 cooperate to form two dipoles with orthogonal polarizations. In this manner, the feed structure 20 feeds the two dipoles, respectively, so that signals can be radiated. And, each radiator 310 is provided with a hollow-out slot 311. Therefore, the current path on the radiator 310 is more diversified, the electrical length of the radiator 310 is increased, the bandwidth is expanded, and the gain is improved; the weight of the vibrator is also reduced. The radiator 310 may be a sheet, a strip, or other types of structures capable of radiating signals. Moreover, the outline or the track of the hollow-out slot 311 can be flexibly adjusted or designed according to actual requirements, so that the projection pattern of the whole radiator 310 can be flexibly changed according to actual use requirements.

As shown in fig. 2, the radiation assembly 300 further includes a connector 330 for connecting two adjacent radiators 310. Therefore, the connecting body 330 connects the two adjacent radiators 310, so that the current path of the radiating assembly 300 is more diversified, the electrical length of the radiating assembly 300 can be increased, the bandwidth can be effectively expanded, the gain can be improved, and the radiation performance of the oscillator can be improved. The connecting body 330 may have a strip, a bar, or other types of structures.

As shown in fig. 1 and 2, a gap 320 is formed between two adjacent radiators 310. Thus, the four radiators 310 are arranged at intervals, so that the four gaps 320 are arranged in a cross shape, the radiating circuits can be isolated, crosstalk between the circuits can be effectively reduced, and the isolation of the radiating assembly 300 is improved. The connector 330 includes a third bent portion 331 disposed in the gap 320 and a connecting portion 332 for connecting the third bent portion 331 and the radiator 310, and the connecting portion 332 is disposed outside the radiator 310. So, set up third kink 331 in the clearance 320 that corresponds, can effectively extend radiating element 300's current loop, increase radiating element 300's electric length, can effectual expansion bandwidth, improve the gain to the radiation performance of oscillator has been promoted.

The third bending portion 331 may be V-shaped, W-shaped, or n-shaped, and the specific bending condition may be flexibly changed according to actual use and design requirements.

The connection portion 332 is disposed outside the radiator 310, which means that the connection portion 332 is disposed between the radiator 310 and the first coupling element 210, or the connection portion 332 is disposed between the radiator 310 and the second coupling element 220.

In addition, every two adjacent radiators 310 are connected through the connecting portion 332 and the third bending portion 331, so that the response frequency band of the oscillator can be expanded from 2.515GHz-2.675GHz to 2.4GHz-2.8 GHz.

In one embodiment, an antenna is also provided, which includes the element of any of the above embodiments.

The antenna of the embodiment can effectively expand the bandwidth, improve the gain and have good radiation performance; the assembly space can be effectively saved, and the space utilization rate is improved; crosstalk between circuits can be effectively reduced, and the isolation of the radiation assembly 300 is improved.

The number of transducers can be flexibly selected or adjusted according to actual use conditions.

As shown in FIG. 4, in one embodiment, the standing wave reaches below 1.3 in the 2.515GHz-2.675GHz frequency band, and the standing wave has good standing wave characteristics.

As shown in fig. 5, in one embodiment, the isolation of the antenna can reach over 17.5dB in the frequency band of 2GHz-3GHz, and especially reach over 27.5dB in the frequency band of 2.515GHz-2.675GHz, which has high isolation characteristics.

As shown in fig. 6, in one embodiment, the gain of the antenna reaches 11.45dB with high gain in the 2.515GHz-2.675GHz band.

The "certain body" and the "certain portion" may be a part corresponding to the "member", that is, the "certain body" and the "certain portion" may be integrally formed with the other part of the "member"; the "part" can be made separately from the "other part" and then combined with the "other part" into a whole. The expressions "a certain body" and "a certain part" in the present application are only one example, and are not intended to limit the scope of the present application for reading convenience, and the technical solutions equivalent to the present application should be understood as being included in the above features and having the same functions.

It should be noted that, the components included in the "unit", "assembly", "mechanism" and "device" of the present application can also be flexibly combined, i.e., can be produced in a modularized manner according to actual needs, so as to facilitate the modularized assembly. The division of the above-mentioned components in the present application is only one example, which is convenient for reading and is not a limitation to the protection scope of the present application, and the same functions as the above-mentioned components should be understood as equivalent technical solutions in the present application.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. The term "and/or" as used in this disclosure includes any and all combinations of one or more of the associated listed items.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to," "disposed on," "secured to," or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is considered as "fixed transmission connection" with another element, the two elements may be fixed in a detachable connection manner or in an undetachable connection manner, and power transmission can be achieved, such as sleeving, clamping, integrally-formed fixing, welding and the like, which can be achieved in the prior art, and is not cumbersome. When an element is perpendicular or nearly perpendicular to another element, it is desirable that the two elements are perpendicular, but some vertical error may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It should also be understood that in explaining the connection relationship or the positional relationship of the elements, although not explicitly described, the connection relationship and the positional relationship are interpreted to include an error range which should be within an acceptable deviation range of a specific value determined by those skilled in the art. For example, "about," "approximately," or "substantially" may mean within one or more standard deviations, without limitation.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A radiating structure, comprising:

the dielectric plate is provided with a radiation surface;

a first coupling element disposed at the radiating surface;

2. The radiation structure according to claim 1, wherein the dielectric plate further has a back surface disposed opposite to the radiation surface, and the radiation structure further comprises a third coupling element disposed on the back surface, and the third coupling element is coupled to the first coupling element and the second coupling element.

3. The radiation structure according to claim 2, wherein the first coupling member has a first bending portion at an end thereof adjacent to the second coupling member, the second coupling member has a second bending portion at an end thereof adjacent to the first coupling member, the third coupling member is disposed corresponding to the first bending portion and the second bending portion, and the third coupling member is coupled with the first bending portion and the second bending portion.

4. The radiating structure of claim 3, wherein the first bending portion comprises a first bending section disposed toward the radiating element and a second bending section disposed away from the second coupling element, and the first bending section and the second bending section are coupled to the third coupling element; and/or the second bending part comprises a third bending section and a fourth bending section, wherein the third bending section faces towards the radiation assembly and the fourth bending section faces away from the first coupling piece in the direction, and the third bending section and the fourth bending section are matched with the third coupling piece in a coupling mode.

5. The radiating structure of claim 3, wherein the first coupling member and the second coupling member are symmetrically disposed about a central axis of the dielectric slab.

6. The radiating structure according to any one of claims 1 to 5, wherein the radiating element comprises four spaced radiators, the four radiators cooperate to form two orthogonally polarized dipoles, and each radiator is provided with a hollow-out slot.

7. The radiating structure of claim 6, wherein the radiating assembly further comprises a connector for connecting two adjacent radiators.

8. The radiating structure according to claim 7, wherein two adjacent radiators are spaced apart from each other to form a gap, the connector includes a third bent portion disposed in the gap, and a connecting portion for connecting the third bent portion and the radiators, and the connecting portion is disposed outside the radiators.

9. A vibrator, characterized by comprising a feeding structure for feeding the radiating element and a radiating structure according to any of claims 1 to 8.

10. An antenna comprising the element of claim 9.