RU222155U1 - DUAL POLARIZATION ANTENNA ELEMENT - Google Patents

Abstract

The utility model relates to the designs of radiating elements of antennas. The technical result consists in reducing unwanted mutual influence between antenna elements in a multi-band antenna array while maintaining the intrinsic characteristics of a dual-polarization antenna element. The technical result is achieved due to the fact that the dual-polarization antenna element contains: a base, a power supply, an emitter, including two orthogonally located dipoles, each of which contains a pair of arms, with each arm of each dipole containing a first conductive segment and a second conductive segment, a balancing device located between the base and the emitter. The bipolarization antenna element further contains an intermediate element made of dielectric material and located between the first conductive segments and the second conductive segments of the dipole arms, wherein the balun includes grooves, and each arm of each dipole contains a third conductive segment, bent in the direction of the base and located in the corresponding groove of the balun.

Description

[0001] The utility model relates to designs of radiating elements of antennas.

State of the art

[0002] In a cellular communication system, the geographic service area of mobile subscribers is divided into a number of sectors, called "cells", in the center of which corresponding base stations are located. For continuous two-way communication between mobile subscribers, the base station may include several antennas, the directional beams of which cover a separate “cell”. Typically, base station antennas are placed on elevated structures, such as towers, masts or roofs of multi-story buildings.

[0003] Base station antennas are often implemented as a dual-polarization linear phased array antenna that has a half-power azimuthal beamwidth of 65 degrees. As a phased array antenna element, the most common one in use is the crossed dipole design, which provides two independent linear polarizations located orthogonal to each other.

[0004] One of the first dual polarization antennas is described in patent document US3740754A, in which two dipoles are made of metal tubes and are located at right angles to each other over a reflective surface and are powered by two pairs of coaxial lines. Since then, engineers have continued to improve dual-polarization antennas. Patent document US4184163A describes a dual-polarization broadband antenna in which the dipole arms are made of metal loops shaped like a ring or a square frame. Patent documents US5481272A, US796372A, US5952983A, US6028563A and US6072439A describe several types of dipoles, including folded lattice dipoles, butterfly dipoles, and printed circuit board balun dipoles. Crossed dipoles located on a balun are the simplest dual-polarization antennas, so hundreds of such antennas have been invented to expand the operating bandwidth and reduce production costs, while maintaining the required beamwidth in the azimuthal plane at half power and good level selectivity cross-polarization.

[0005] But in these days of mass use of mobile phones, the market annually needs to expand network capacity. In order to adapt to the growing volume of mobile subscribers, cellular operators have added communication services in new frequency ranges. This means that now several base station antennas of different ranges are sent to one cell at once and the cell is divided into additional service sectors. As the number of new frequency bands has increased, the number of antennas located on a typical base station mast has increased proportionately. However, due to existing requirements for wind and weight loading of antenna towers, the number of antennas deployed at one base station has become limited.

[0006] And in order to increase the network capacity without further increasing the number of antennas in one base station, so-called multi-band antenna arrays were introduced, which include several linear arrays of antenna elements of different frequency ranges. These linear arrays of antenna elements of different bands are located side by side on a single reflective surface called an antenna reflector. The most common multi-band antenna design today is a design containing a linear array of low-frequency radiating antenna elements in the range 690-960 MHz, which is positioned in the center of the reflector of the multi-band antenna array and at least two linear arrays of high-frequency radiating elements in the range 1690-2690 MHz , which are located at the edges of the reflector of a multi-band antenna array, that is, to the left and right of the low-frequency elements 690-960 MHz, respectively.

[0007] The emergence of multi-band antenna arrays on the cellular communications market has become an effective way to increase the capacity of a cellular network, while eliminating not only the need to build additional base stations, but also significantly reducing the cost of their maintenance. However, when reducing the distance between the high-frequency and low-frequency elements of a multi-band array, placing the high-frequency linear arrays closer to the center of the antenna reflector, which is often required by cellular operators, to reduce the weight and dimensions of the antennas. This leads to the emergence of undesirable mutual influence between the two frequency ranges, which significantly worsens the basic parameters of the operating ranges, such as: gain, position of the radiation pattern relative to the main direction of radiation and frequency characteristics of the reflection coefficient of both polarizations.

[0008] To a greater extent, the undesirable interaction of adjacent antenna elements in a multi-band array manifests itself in distortion of the operation of low-frequency emitters. For example, a typical low-frequency crossed dipole located above a reflective surface at a distance of about a quarter wavelength at the mid-range frequency of the operating range produces a radiation pattern in the azimuthal plane of 65 degrees at half power level. Whereas, the same crossed dipole located above a flat reflective surface at the same distance, but surrounded by high-frequency dipoles, can have a radiation pattern extension of 70-120 degrees in the azimuthal plane at half power level, as depicted in Fig. 9 curve A.

[0009] The fact is that the signal emitted by a low-frequency dipole is reflected from high-frequency antenna elements. Moreover, the shape and dimensions of the radiating part of the high-frequency element affect the degree of distortion of the radiation patterns of the low-frequency element and has a frequency dependence. This suggests that the design of the high-frequency dipole determines the phase and direction of the reflected low-frequency signal. Accordingly, one of the ways to minimize such a negative effect is to change the size of the high-frequency antenna element or increase the distance between it and the low-frequency dipole, which leads to a narrowing of the range properties of high-frequency elements or an increase in the overall dimensions of the multi-band antenna array.

[0010] As the closest analogue, the technical solution disclosed in patent document US9711871B2, publ. 07/18/2017 The known technical solution includes a base, a power supply, an emitter, a housing and a balun. The emitter includes two orthogonally located identical dipoles, each of which contains a pair of arms located on a printed circuit board. The balancing device includes two crossed electrical substrates. The power supply includes conductors located on said substrates of the balun and connected to said dipoles, and connectors for connecting cables located in the protruding parts of the housing in the lower part. The housing is made in the form of a hollow cylinder with an annular flange and can be located in the hole of the antenna reflector. The annular flange of the housing provides grounding of the housing through a dielectric gasket to the antenna reflector.

[0011] Changing the phase of the re-reflected low-frequency signal from a known technical solution by shifting the effect of destruction of the radiation patterns of the low-frequency element down the range is ensured by placing a balun in the housing.

[0012] The disadvantage of the known technical solution is that when used, the range properties of the directivity characteristics of the high-frequency element are narrowed and its frequency characteristics of the reflection coefficient are deteriorated. The housing has an undesirable reflective effect of the emitter, which leads to increased mutual influence between the substrates of the balun, thereby increasing the level of cross-polarization radiation and lowering the level of insulation between the ports of the emitter of the known technical solution. The depth and diameter of the housing reduce the effective area of the reflective surface of the antenna, which causes the beam to expand in the azimuthal plane at the half-power level at the top of the operating frequency range of the known technical solution. Moreover, such a configuration of the known technical solution with a housing significantly increases the size of the multi-band antenna array and complicates its assembly, which can lead to difficulties in mass production of the product.

[0013] The technical problem is to create a technical solution that eliminates the disadvantages of the closest analogue.

Disclosure of the essence of the utility model

[0014] The technical result consists in reducing unwanted mutual influence between antenna elements in a multi-band antenna array while maintaining the intrinsic characteristics of a dual-polarization antenna element.

[0015] The technical result is achieved due to the fact that the dual-polarization antenna element contains:

[0016] - base,

[0017] - food means,

[0018] - an emitter including two orthogonally arranged dipoles, each of which contains a pair of arms, with each arm of each dipole containing a first conductive segment and a second conductive segment,

[0019] - a balancing device located between the base and the emitter.

[0020] The dual-polarization antenna element further comprises an intermediate element made of a dielectric material and located between the first conductive segments and the second conductive segments of the dipole arms, wherein the balun includes grooves, and each arm of each dipole contains a third conductive segment bent in the direction base and located in the corresponding groove of the balun.

[0021] In an additional aspect, the proposed technical solution is characterized in that each arm of each dipole is made with an elongated segment bent towards the base.

[0022] In an additional aspect, the proposed technical solution is characterized in that the third conductive segment of each arm of each dipole is configured with constriction areas covered by dielectric rings.

[0023] In an additional aspect, the proposed technical solution is characterized in that the third conductive segments of the dipole arms have the same length.

[0024] In an additional aspect, the proposed technical solution is characterized in that the intermediate element includes a collar located around the perimeter of the intermediate element and oriented in a direction away from the base, while the first conductive segments and the second conductive segments of the dipole arms lie in a space limited the mentioned collar.

[0025] In an additional aspect, the proposed technical solution is characterized in that the power means includes a plurality of matching circuits.

[0026] In a further aspect, the proposed technical solution is characterized in that the power means includes contact tracks located on the upper surface of the base.

[0027] In a further aspect, the proposed technical solution is characterized in that the power means includes contact tracks located on the lower surface of the base.

[0028] In an additional aspect, the proposed technical solution is characterized in that the emitter is made with a director.

[0029] In an additional aspect, the proposed technical solution is characterized in that the third conductive segments of the arms in each dipole are made of different lengths.

Brief description of drawings

[0030] In FIG. 1 shows a perspective view of a preferred embodiment of the proposed technical solution.

[0031] In FIG. 2 shows a top view of the preferred embodiment of the proposed technical solution.

[0032] In FIG. Figure 3 shows the preferred embodiment of the proposed technical solution in disassembled form.

[0033] In FIG. Figure 4 shows a cross-section of the preferred embodiment of the proposed technical solution.

[0034] In FIG. 5 is a top view based on the preferred embodiment of the proposed technical solution.

[0035] In FIG. 6 is a bottom view based on a preferred embodiment of the proposed technical solution.

[0036] In FIG. Figure 7 shows a section of a multi-band antenna array.

[0037] In FIG. Figure 8 shows the implemented S-parameters of the preferred embodiment of the proposed technical solution.

[0038] In FIG. Figure 9 presents a comparison of the results of electrodynamic analysis of the described analogue of a dual-polarization antenna and the proposed technical solution.

[0039] In FIG. Figure 10 shows radiation patterns in the azimuthal plane at the half-power level in the polar coordinate system of the proposed technical solution.

[0040] In FIG. 11 shows the dependence of the beamwidth in the azimuthal plane at half power level relative to the operating frequency range of a dual-polarization antenna element according to the invention.

[0041] In FIG. 12 is a perspective view of an alternative embodiment of the proposed technical solution.

[0042] In FIG. 13 is a perspective view of an alternative embodiment of the proposed technical solution.

[0043] In FIG. 14 is a perspective view of an alternative embodiment of the proposed technical solution.

[0044] In FIG. 15 is a perspective view of an alternative embodiment of the proposed technical solution.

Implementation of a utility model

[0045] In FIG. 1-6 shows a dual-polarization high-frequency antenna element 1, placed on a reflector 2. The high-frequency emitting antenna element 1 includes a base 3, a power source, an emitter 4, a balun 5 and an intermediate element 6.

[0046] The base 3 is flat and is preferably a dielectric plate known in the art, such as a printed circuit board.

[0047] The power supply includes connectors 7, a contact pad 8, contact tracks 9 and two contact elements 10.

[0048] The power supply connectors 7 are connectors known from the prior art, fixed to the base 3 and configured to connect to the power cables 11.

[0049] The pad 8 is a prior art pad located on the base 3, produced by a prior art operation such as etching, and includes a plurality of plated through holes 12 that connect the top surface 13 and the bottom surface 14 of the base 3, which dampens the surface currents of two orthogonal polarizations flowing under the base of the balun 5 and provides a high level of insulation between the ports (see Fig. 8). Through metallized holes 12 make it possible to maintain a given level of insulation between polarizations. The upper surface 13 and lower surface 14 of the base 3 are covered with a thin layer of dielectric mask, which ensures grounding of the high-frequency radiating antenna element to the reflector 2.

[0050] In the base 3 there are through holes 15 for the contact elements 10, around the edge of which there are contact pads on the lower surface 14 of the base 3.

[0051] Each contact track 9 includes a plurality of through-plated holes 16, an upper section 17 located on the upper surface 13 of the base 3 and electrically connected to the connector 7, a lower section 18 located on the lower surface 14 of the base 3 and electrically connected to the upper section 17 of the contact track 9 by means of the mentioned through metallized holes 16 and contact pads around the through holes 15 for the contact elements 10. When placing the contact elements 10 in the holes 15 for the contact elements 10, an electrical connection is formed between the contact elements 10 and the contact tracks 9, for example, behind contact and/or welding account.

[0052] The contact element 10 is U-shaped, with one of the legs being longer than the other. The shelves of the contact elements 10 are arranged crosswise and are not connected to each other. Each contact element 10 excites its own polarization.

[0053] The emitter 4 includes two orthogonally arranged identical dipoles 19A, 19B, each of which contains a pair of arms 20: a first arm 20A and a second arm 20B, and providing two linear slant polarizations of +45 and -45 degrees. Each dipole 19A, 19B has a capacitive contact with a corresponding contact element 10.

[0054] Each arm 20 of each dipole 19 includes conductive segments 21 extending from a single location having a single origin: a first conductive segment 21A, a second conductive segment 21B, and a third conductive segment 21C. The first conductive segment 21A and the second conductive segment 21B are connected at their two ends and are located in the same plane, and the third conductive segment 21C is located between the first conductive segment 21A and the second conductive segment 21B and is bent towards the base 3, while the bent portion of the third conductive segment 21C preferably parallel to the vertical axis of the high-frequency radiating antenna element 1. The excitation of pairs of linearly arranged arms 20 of the dipole 19 is provided by a power supply.

[0055] The balancing device 5 includes grooves 22 and holes 23 and is located on the base 3.

[0056] The slots 22 of the balun 5 are oriented longitudinally relative to the vertical axis of the high-frequency radiating antenna element 1, while the third conductive segments 21C of the arms 20 of the dipoles 19 are located in the slots 22. This arrangement of the third conductive segments 21C of the arms 20 of the dipoles 19 provides a capacitive connection of the arms 20 of the dipoles 19 with their balun 5. The third conductive segment 21C of the arm 20 of the dipole 19, placed in the groove 22 of the balun 5, forms an open loop at the end, the input resistance of which depends on its length and the surrounding dielectric, that is, on its electrical length. If the electrical length of the loop is equal to a quarter of the wavelength, then its input resistance is equal to zero, which is equivalent to a short circuit and provides an electrical connection of the arms 20 of the dipole 19 with its balun 5.

[0057] The holes 23 of the balun device 5 are made through and oriented along the vertical axis of the high-frequency radiating antenna element 1. The contact elements 10 of the power supply are placed in the holes 23 of the balun device 5.

[0058] The intermediate element 6 is essentially a plate, made of a dielectric material, is a fastening element and is located between the first conductive segments 21A and the second conductive segments 21B of the arms 20 of the dipoles 19 and the balun 5, which prevents direct contact of the dipoles 19 and a balun 5. The intermediate element 6 includes holes 24 for the third conductive segments 21C of the arms 20 of the dipoles 19 and a hole 25 for the contact elements 10 of the power supply.

[0059] The reflector 2 is a conductive reflective surface, with the help of which a directional beam of the dipole 19 is formed, for the high-frequency radiating element 1 of the antenna contains a circular cutout and is connected to the high-frequency antenna element by means of an assembly operation known from the prior art, for example, by means of a plastic fastener.

[0060] In FIG. 7 shows an example of using the preferred embodiment of the proposed technical solution. The antenna array 26 includes a low-frequency emitting antenna element 27 and a plurality of high-frequency emitting antenna elements 1. When the radiated signal falls from the low-frequency emitting antenna element 27 to the high-frequency emitting antenna element 1, the currents induced on it by the low-frequency signal first bend around only the shoulders 20 of the dipoles 19 high-frequency radiating antenna element 1, since they do not have a direct connection with the balun 5, which forms a reflected wave from the high-frequency radiating antenna element 1, as from an object of smaller electrical dimensions, which changes the phase of the reflected signal of the low-frequency antenna element 27 and ensures the restoration of its diagrams directionality, the results are presented in Fig. 9.

[0061] The proposed design of a high-frequency radiating antenna element 1, in which the emitter 4 is physically separated from the balun 5, but has a capacitive connection with it provided by the intermediate element 6 and the third conductive segments 21C of the arms 20 of the dipole 19, allows you to change its electrical dimensions, as reflecting the low-frequency signal of the body, which changes the phase of the re-reflected signal of the antenna element 1 as reflecting the low-frequency signal of the body, which changes the phase of the re-reflected signal of the low-frequency emitting antenna element 27 and ensures the restoration of its radiation patterns. The third conductive segments 21C of the arms 20 of the dipoles 19, located in the corresponding slots 22 of the balun 5, make it possible to change the phase of the reflected low-frequency signal from the proposed technical solution in such a way that the effect of unwanted mutual influence goes beyond the operating band of the low-frequency antenna element 27, thereby restoring its diagram directionality to the desired level, as shown in Fig. 9, accordingly this entails an improvement in the level of gain, the level of cross-polarization isolation and isolation between polarizations. This design of the crossed dipole 19 makes it possible to change the electrical dimensions of the proposed technical solution, as a body reflecting a low-frequency signal, which changes the phase of the reflected signal of the low-frequency antenna element and ensures the restoration of its radiation patterns.

[0062] The arrangement of the third current-carrying segments 21C of the dipole arms 20 of the dipoles 19 in the corresponding slots 22 of the balun 5 allows one to minimize the mutual influence between the high-frequency radiating antenna elements 1 and the low-frequency radiating antenna elements 27 in the antenna array 26 and maintain or improve the intrinsic frequency characteristics of the reflection coefficient. Since a change in its electrical length can introduce the desired reactivity of a series-connected capacitance or inductance to the circuit of the balun 5, which is an additional adjustment element in the general matching circuit (see Fig. 8).

[0063] The proposed design of the high-frequency radiating antenna element 1 allows maintaining the frequency characteristics of the reflection coefficient while minimizing unwanted interference with neighboring elements in the antenna array 26 required level to the beamwidth in the azimuthal plane at the half-power level, as shown in FIG. 10 and 11.

[0064] The solution to a technical problem and the achievement of a technical result are demonstrated above in an embodiment of the proposed technical solution. A person skilled in the art will see other options for implementing the features of the proposed technical solution using material and technical means known from the prior art.

[0065] In other embodiments of the proposed technical solution, the shape of the dipole arm may differ from that previously disclosed and shown in the drawings of the preferred embodiment. So in Fig. 12 shows one of the possible alternative embodiments of the dipole arm 28, which differs from the arm 20 of the dipole 19 of the preferred embodiment in that each arm 28 of the dipole 19 is made with an elongated segment 29, bent in the direction of the base 3, extending from the junction of the first conductive segment 21A and the second conductive segment 21B and oriented along the vertical axis of the second embodiment of the proposed technical solution. Extended segments 29 make it possible to obtain an improved level of cross-polarization isolation compared to the described analogues.

[0066] In other embodiments, the design of the third conductive segment may differ from that previously disclosed and shown in the drawings of the preferred embodiment. So, in Fig. 13 shows one of the possible alternative embodiments of the third conductive segment 30, which differs from the preferred embodiment in that the third conductive segment 30 is enlarged and has a plurality of widening areas and narrowing areas, while the narrowing areas are surrounded by dielectric rings 31. Third conductive segment 21C can be significantly longer than a quarter of the wavelength of the extreme lower frequency of the high-frequency operating frequency range, which makes it possible to enhance the effect of reducing unwanted mutual influence and bring it far beyond the operating range of the low-frequency antenna element. The contractions and expansions, together with the dielectric rings, increase the electrical size of the third conductive segment. By increasing the electrical length of the third conductive segment 30, it is possible to regulate the frequency dependence of the undesirable effect of expanding the radiation patterns of the low-frequency antenna element up or down its operating range. This makes it possible to extend the effect of mutual reflections far beyond the operating frequency range of a multi-band antenna array.

[0067] The third conductive segments 21C of the arms 20 of the dipoles 19, located in the corresponding slots 22 of the balun 5, preferably have the same length, since this is important for tuning the antenna array in the operating frequency band and for minimizing the unwanted effects of the reflected low-frequency signal and in the operation of the highest frequency dipole. It will be appreciated that the third conductive segments 21C of the arms 20 in each dipole 19A may vary in length to provide specific tuning for the high frequency dipole only.

[0068] In other embodiments of the proposed technical solution, the design and shape of the intermediate element may differ from that previously disclosed and shown in the drawings of the preferred embodiment. So, in Fig. 14 shows one of the possible alternative embodiments of the intermediate element 32, which differs from the intermediate element 6 in the preferred embodiment in that it includes a collar 33 located around the perimeter of the intermediate element 6 and oriented upward (in the direction from the base 3), while the first the conductive segments 21A and the second conductive segments 21B of the arms 20 of the dipoles 19 lie in the space limited by the mentioned shoulder 33. This design of the intermediate element 6 makes it possible to increase the electrical dimensions of the dipoles 19 and expand the range of operating frequencies.

[0069] In other embodiments of the proposed technical solution, the power supply may be a power source known from the prior art. So, in Fig. 14 shows one of the possible alternative embodiments of the power supply, which includes a plurality of matching circuits 34 located on the base 3. It is also obvious that in other embodiments of the proposed technical solution, the contact track 9 can be located only on the upper surface 13 of the base 3 ( see Fig. 15).

[0070] In other embodiments of the proposed technical solution, the design of the emitter may differ from that previously disclosed and shown in the drawings. So, in Fig. 14 shows one of the possible alternative embodiments of the emitter 36, which is made with a director 37, which makes it possible to improve the cross-polarization in the operating frequency band.

[0071] In other embodiments of the proposed technical solution, it can be used as a high-frequency or low-frequency antenna element.

[0072] In the previously disclosed preferred embodiment of the proposed technical solution, the connection points 38 of the contact elements 10 with the corresponding contact tracks 9 are located on the lower surface 14 of the base 3 (see Fig. 4, 6). Obviously, in other embodiments of the proposed technical solution, at least one connection point 38 of the contact element 10 with the contact track 9 may be located on the upper surface 13 of the base 3 or on the lower surface 14 of the base 3 and may represent a soldering point. So, for example, in FIG. 15 places 38 connecting the contact elements 10 with the corresponding tracks 9 are located on the upper surface 13 of the base 3.

[0073] The proposed technical solution, for example, in comparison with the closest analogue, minimizes the undesirable effect of mutual reflection in a multi-band antenna array, while maintaining the values of its main parameters, is easy to manufacture and convenient to use. These advantages are confirmed by the results of the frequency characteristics of the reflection coefficient and the radiation patterns presented on the implemented model of the proposed dual-polarization antenna element shown in Fig. 8, 10, 11. In other words, the minimization of unwanted mutual influence between antenna elements in a multi-band antenna array is ensured while maintaining the inherent characteristics of the proposed technical solution.

[0074] Reference numbers shown in the drawings:

1 – high-frequency radiating antenna element according to the preferred embodiment

2 – antenna reflector

3 – base

4 – emitter

5 – balancing device

6 – intermediate element

7 – connector

8 – contact pad

9 – contact track

10 – contact element

11 – power cable

12 – through metallized hole of contact pad 8

13 – upper surface of base 3

14 – lower surface of base 3

15 – hole for contact element 10

16 – through metallized hole of contact track 9

17 – upper section of contact track 9

18 – lower section of contact track 9

19A, 19B – dipoles

20A, 20B – dipole arms 19

21A, 21B, 21C – conductive segments of arms 20 dipoles 19

22 – groove of balancing element 5

23 – hole of balancing element 5

24 – hole for the third conductive segment 21C of the arm 20 of the dipole 19 of the intermediate element 6

25 – hole for contact elements 10 power supply for intermediate element 6

26 – antenna array

27 – low-frequency radiating antenna element

28 – alternative design of dipole arm 19

29 – extended segment of arm 28 of dipole 19

30 – alternative embodiment of the third conductive segment

31 – dielectric ring

32 – alternative design of the intermediate element

33 – collar

34 – matching circuit

35 – alternative version of the emitter

36 – director

37 – junction of contact element 10 with contact track 9.

Claims (15)

1. Dual-polarization antenna element containing: - base, - means of nutrition, - an emitter including two orthogonally located dipoles, each of which contains a pair of arms, with each arm of each dipole containing a first conductive segment and a second conductive segment, - a balancing device located between the base and the emitter, characterized in that it additionally contains an intermediate element made of dielectric material and located between the first conductive segments and the second conductive segments of the dipole arms, wherein the balun includes grooves, and each arm of each dipole contains a third conductive segment bent in the direction of the base and located in the corresponding groove of the balun. 2. A dual-polarization antenna element according to claim 1, characterized in that each arm of each dipole is made with an elongated segment bent in the direction of the base. 3. A dual-polarization antenna element according to claim 1, characterized in that the third conductive segment of each arm of each dipole is made with constriction areas covered by dielectric rings. 4. A dual-polarization antenna element according to claim 1, characterized in that the third conductive segments of the dipole arms have the same length. 5. A dual-polarization antenna element according to claim 1, characterized in that the intermediate element includes a collar located along the perimeter of the intermediate element and oriented in the direction from the base, while the first conductive segments and the second conductive segments of the dipole arms lie in the space limited by the said shoulder. 6. A dual-polarization antenna element according to claim 1, characterized in that the power supply includes a plurality of matching circuits. 7. A dual-polarization antenna element according to claim 1, characterized in that the power supply includes contact tracks located on the upper surface of the base. 8. A dual-polarization antenna element according to claim 1, characterized in that the power supply includes contact tracks located on the lower surface of the base. 9. Dual-polarization antenna element according to claim 1, characterized in that the emitter is made with a director. 10. Dual-polarization antenna element according to claim 1, characterized in that the third conductive segments of the arms in each dipole are made of different lengths.