CN215184520U - Dual-polarized antenna - Google Patents

Abstract

The embodiment of the application discloses a dual-polarized antenna, relates to the field of communication, and can provide sufficient bandwidth and efficiency while realizing dual-polarized radiation. The specific scheme is as follows: the dual polarized antenna includes: a first radiating structure, and a first feed structure. The first radiating structure is projectively superposed with the first feed structure. The first radiating structure includes at least one radiator. The first feed structure comprises a field-shaped feed structure, the field-shaped feed structure comprises four conductive branches and a peripheral conductive structure which is respectively conducted with the outer sides of the four conductive branches. The inner sides of the four conductive branches are arranged in pairs in an opposite mode, and the two conductive branches arranged in the opposite mode form a feed structure.

Description

Dual-polarized antenna

Technical Field

The utility model relates to the field of communications, especially, relate to a dual polarized antenna.

Background

The electronic equipment can realize the transceiving of signals through an antenna arranged in the electronic equipment. At present, with the improvement of the communication performance requirement of the electronic device, the bandwidth requirement of the antenna is more strict.

For example, the electronic device is taken as an example that needs to perform Wireless Fidelity (WIFI) signal transmission and reception. In general, the 5G WIFI frequency band is 5GHz-6 GHz. Most WIFI antennas cannot meet the bandwidth requirement of 1GHz, so that the problem that communication of electronic equipment is blocked due to insufficient bandwidth of the antennas occurs.

In addition, because the dual-polarized radiation characteristic can significantly improve the communication capability of the electronic device in the corresponding frequency band, in order to meet the communication requirement of 5G WIFI, it is necessary to set an antenna with a bandwidth sufficient to cover the 5G WIFI full frequency band and having the dual-polarized radiation characteristic in the electronic device.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a dual-polarized antenna which can provide enough bandwidth and efficiency while realizing dual-polarized radiation. In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

the utility model provides a dual polarized antenna, this dual polarized antenna includes: a first radiating structure, and a first feed structure; the first radiation structure is superposed with the first feed structure in a projection manner; the first radiating structure comprises at least one radiator; the first feed structure comprises a field-shaped feed structure, the field-shaped feed structure comprises four conductive branches and a peripheral conductive structure which is respectively communicated with the outer sides of the four conductive branches; the inner sides of the four conductive branches are arranged in pairs in an opposite mode, and the two conductive branches arranged in the opposite mode form a feed structure.

Based on the scheme, a novel dual-polarized antenna is provided. The dual polarized antenna has a double-layered structure such as a first radiation structure and a first feed structure. The first radiating structure is electromagnetically coupled to the first feed structure. At least one radiator arranged on the first radiation structure can provide a part of bandwidth of the dual-polarized antenna coverage frequency band, and the conductive branch of the first feed structure can provide another part of bandwidth of the dual-polarized antenna coverage frequency band. The resonance generated by the two structures is synthesized, so that a wider frequency band range can be provided, for example, the bandwidth of 1GHz corresponding to a 5G WIFI frequency band can be sufficiently covered through experimental verification. Meanwhile, the first radiator and the first feed structure are electromagnetically coupled, so that the space near the antenna is relatively clean, and better radiation efficiency can be provided. In addition, through the Chinese character tian-shaped feed structure, two opposite conductive branches form a feed structure at the geometric center of the first feed structure, so that dual-polarized feed can be realized through the two feed structures, and further dual-polarized radiation of the antenna is realized.

In one possible design, the four conductive branches are distributed with a rotational symmetry of 90 ° with respect to the geometric center of the first feed structure. Based on the scheme, the distribution condition of the four conductive branches corresponding to the field-shaped feed structure is provided. Because the four conductive branches are not connected with each other at the inner side, and two opposite conductive branches can correspond to one feed structure, the two feed structures can be distributed at 90 degrees, and the phase difference of current generated when the two feed structures feed simultaneously is 90 degrees. Thereby ensuring the dual-polarized radiation characteristic of the antenna.

In one possible design, the first radiator comprises a first patch antenna, the center of which coincides with the geometric center of the first radiating structure; the peripheral perimeter of the patch antenna is between one quarter and one half of the wavelength of the working frequency band of the dual-polarized antenna. Based on this solution, a possible dimensioning of the first radiator is provided. For example, when the antenna operates in a 5G WIFI frequency band, the size of the first patch antenna included in the first radiator may correspond to a wavelength (e.g., a wavelength corresponding to 5.5GHz) corresponding to the 5G WIFI frequency band. In some implementations, the first patch antenna may be square, and the perimeter of the square may be in the range [1/4 operating wavelength, 1/2 operating wavelength ], wherein the operating wavelength may be a wavelength corresponding to 5.5 GHz.

In one possible design, the first radiator includes four second patch antennas, which are arranged in a rotational symmetry of 90 ° with respect to the geometric center of the first radiating structure. Based on the scheme, the composition of the first radiator is further provided. In this example, 4 patch antennas may be disposed on the first radiator, and the outward direction of each patch antenna may be the same or similar. The 4 patch antennas form a slot with each other, which may be around 1 mm.

In one possible design, the second patch antenna is square, and the side length of the second patch antenna corresponds to one eighth of the wavelength of the working frequency band of the dual-polarized antenna. Based on the scheme, a specific structural schematic of the second patch antenna is provided. In this example, the second patch antenna may be a rotationally symmetric pattern such as a square, and the side length thereof may be about one eighth of the wavelength of the operating band.

In one possible design, a perpendicular projection of the feeding structure disposed on the first feeding structure on a plane where the first radiator is located coincides with at least part of at least one radiator included in the first radiation structure. Based on this solution, a relative position definition of the first feed structure and the first radiator is provided. It will be appreciated that in this arrangement, the first feed structure feeds the first radiator by electromagnetic coupling, and therefore the first radiator may overlap the first feed structure in vertical projection, so that the first radiator can be excited better. In some implementations, a geometric center of the first radiator may coincide with centers of two feed structures included in the first feed structure in a projection direction.

Drawings

Fig. 1 is a schematic view of an antenna structure having dual polarization radiation characteristics;

FIG. 2 is a schematic diagram of an S parameter;

fig. 3A is a schematic diagram illustrating the structure of an antenna according to the present invention;

fig. 3B is a schematic diagram illustrating another antenna according to the present invention;

fig. 4 is a schematic diagram illustrating a composition of another antenna provided by the present invention;

fig. 5 is a schematic diagram of a simulation result of the S parameter provided by the present invention;

fig. 6 is a schematic diagram of current simulation provided by the present invention;

fig. 7 is a schematic diagram of a simulation result of another S parameter provided by the present invention;

fig. 8 is a schematic diagram of a simulation result of another S parameter provided by the present invention;

fig. 9 is a schematic diagram illustrating a composition of another antenna provided by the present invention;

fig. 10 is a schematic diagram illustrating comparison of efficiency simulation results provided by the present invention;

fig. 11 is a schematic diagram of a directional diagram simulation provided by the present invention;

fig. 12 is a schematic diagram illustrating a composition of another antenna provided by the present invention;

fig. 13 is a schematic diagram illustrating a composition of another antenna provided by the present invention;

fig. 14 is a schematic diagram of a simulation result of another S parameter provided by the present invention;

fig. 15 is a schematic diagram illustrating comparison of still another efficiency simulation result provided by the present invention;

fig. 16 is a schematic diagram of another direction diagram simulation provided by the present invention.

Detailed Description

In general, communication performance can be improved in an electronic device by providing an antenna having a dual polarization radiation characteristic. It can be understood that compared with a single-polarized antenna, the dual-polarized antenna can transmit two paths of signals simultaneously by using the dual-polarization characteristic, thereby contributing to reducing the number of antennas and reducing the cost. Meanwhile, the effect of improving the diversity gain can be achieved. In order to provide the antenna with dual-polarization radiation characteristics, it is necessary to excite mutually perpendicular currents on the antenna when dual-port feeding is performed. Since the currents are perpendicular to each other, the phases of their respective electromagnetic fields are also 90 degrees apart. Because the electromagnetic waves with the phase difference of 90 degrees have very small mutual influence in the process of simultaneous transmission, the transmission of two paths of signals can be simultaneously carried out. Therefore, the communication performance can be improved through dual-polarization radiation.

By way of example, fig. 1 shows a schematic diagram of an antenna structure with dual-polarized radiation characteristics. The antenna may be constructed of two layers, such as an upper layer and a lower layer. Fig. 1 (a) shows a top view of an upper layer structure of the antenna, and fig. 1 (b) shows a top view of a lower layer structure of the antenna. Wherein the maximum projection areas of the upper and lower layers coincide.

As shown in fig. 1 (a), the upper layer structure of the antenna may include a square conductive region, and a circular groove provided in the square conductive region. The circular groove divides the square conductive region into an outer conductive region and an inner conductive region. In some implementations, the circular slot may have a gap width of 1.5 mm. As shown in fig. 1 (b), the lower structure of the antenna may include an outer conductive region in which a circular non-conductive region is disposed. The lower layer structure of the antenna can also comprise 4T-shaped conductive branches. 4T-shaped conductive branches are arranged in the circular non-conductive area, and the tail end of the T-shaped branch faces outwards. As shown in fig. 1 (b), the 4T-shaped conductive branches are distributed in 90-degree rotational symmetry with respect to the geometric center of the circular non-conductive region. The tail ends of 2 adjacent T-shaped conductive branches are electrically connected with the external conductive area through a signal feed-in point, and the tail ends of the other 2 adjacent T-shaped conductive branches are directly electrically connected with the external conductive area.

When the antenna works, two paths of signals can be fed in through the two signal feed-in points respectively, and the two paths of feed-in signals can excite gaps (such as circular grooves) included in the upper layer to radiate respectively, so that dual-polarization radiation is realized.

Fig. 2 shows a schematic diagram of the S-parameters of the antenna having the structure shown in fig. 1. It can be seen that when the structure shown in fig. 1 is applied in a 5G WIFI radiation scenario, the isolation of the two feed ports (simply referred to as dual ports) is below-20 dB and the return loss of the end points (S11) is-5.3 dB and-3.2 dB, respectively, over the effective radiation range (5GHz-6 GHz).

It should be noted that, generally, the performance of the antenna can be guaranteed when the S11 is below-10 dB and the isolation is below-30 dB. The bandwidth that antenna structure as shown in fig. 1 can provide is not enough, and the dual-port isolation is also relatively poor, therefore, can't satisfy the communication demand in the 5G WIFI radiation scene.

In order to satisfy the bandwidth demand of 5G WIFI frequency channel, provide better dual-port isolation simultaneously, the utility model provides a new antenna structure, dual-port isolation when can promote the dual-port feed effectively, S11 that can guarantee the 5G WIFI frequency channel simultaneously all is below-10 dB, consequently can guarantee the communication demand in the 5G WIFI radiation scene effectively.

Fig. 3A shows a schematic diagram of an antenna structure with dual polarization radiation characteristics provided by the present invention. The antenna may have a two-layer structure (e.g., a first layer and a second layer) with orthogonal projections of the first and second layers coinciding. In some implementations, the first and second layers may be disposed on both sides of a double-sided copper-clad Printed Circuit Board (PCB), respectively. In other implementations, the first layer and the second layer may be disposed in other structures having a double-sided conductive function (e.g., a double-sided conductive Flexible Circuit (FPC) or the like).

Continuing with fig. 3A. Fig. 3A (a) shows a first layer structure of the antenna. The first layer may include conductive regions as well as non-conductive regions. The conductive area may be a patch antenna having a conductive material disposed at a center of the first layer. Illustratively, in some examples, as shown in fig. 3A (a), the patch antenna may be a square patch disposed in the center of the first layer. In other examples, the conductive region may be a patch of other shapes, such as a circle, or other rotationally symmetric shape. Fig. 3A (b) shows a second layer structure of the antenna. As shown in fig. 3A (b), the second layer structure may include a "tian" -shaped feeding structure. In this example, in the conductive region in the second layer structure, a non-conductive region may be provided. For example, the non-conductive region may be a window shaped like a Chinese character 'tian' as shown in (b) of fig. 3A. The non-conductive areas of the 4 windows shaped like a Chinese character tian communicate at the center of the second layer, thereby forming 4 conductive branches which do not communicate at the center.

It should be noted that, in this example, the center of the patch antenna included in the first layer structure may coincide with the projection of the center of the field-shaped feed structure, so that the energy of the field-shaped feed structure can be coupled into the patch antenna as much as possible. In other implementations of the application, the center of the patch antenna may also be offset from the center of the checkered feed structure in the direction of projection. It is to be understood that the space coupling of the signal from the field feed structure to the patch antenna may be achieved.

When the antenna works, two groups of oppositely arranged conductive branches in the second layer structure can respectively form a feed port. Thereby achieving a dual port feed. In this example, the dual port feed structure formed by the second layer structure may be referred to as a feed ring. It will be appreciated that one feed port may correspond to two opposing feed branches.

As an example, fig. 3B shows the electric field distribution of the patch antenna when the field-shaped feeding loop is coupled to the feeding point. As shown in fig. 3B, it can be clearly seen from the sectional side view that the two conductive branches corresponding to one port in the feed ring transmit energy to the patch antenna in an electromagnetic coupling manner, so as to feed the patch antenna.

It is understood that the feeding loop provided in this example can realize dual-polarized radiation of two signals when signals are input to two ports respectively. In the process of radiation, aiming at any one path of two input signals, the conductive branch section corresponding to the other feed port can play a parasitic role and can be used for carrying out impedance adjustment on the radiation of the signals.

For example, referring to fig. 4, the conductive branch corresponding to the port 1 is taken as two conductive branches in the vertical direction as an example. The influence of the conductive branch corresponding to port 2 on the radiation of port 1 can be verified by the S-parameter of port 1 during the feeding process for the structure shown in (a) of fig. 4 and the S-parameter of port 1 during the feeding process for the structure shown in (b) of fig. 4.

Referring to fig. 5, S11 corresponds to the return loss of port 1 when feeding in the structure of (a) shown in fig. 4. S22 corresponds to the return loss of port 1 when feeding is performed with the configuration of (b) shown in fig. 4. It can be seen that the return loss of port 1 is shifted a small amount in the frequency domain after the conductive stub of port 2 is added. It can be verified that the conductive branch of the port 2 plays a parasitic-like role in the radiation process of the port 1. It will be appreciated that similarly, the two conductive branches at port 1 also act as parasitics in the radiation process at port 2. Therefore, in other implementation manners of the present application, the effect of adjusting the frequency position radiated by the other port can be achieved by adjusting the conductive branches corresponding to the two ports respectively.

With the feeding structure as shown in (b) of fig. 3A, each port can operate in a 1 λ mode during feeding. Illustratively, in conjunction with fig. 6, the current distribution of the port 1 corresponding to the two conductive branches is shown when the feeding loop is in operation. It can be seen that at this moment, on the two conductive branches, there are two electric field maximum points and two electric field two points. Therefore, it can be determined that the two conductive branches corresponding to the port 1 operate in the 1 λ mode during the feeding process. Similarly, during the feeding process, the two conductive branches corresponding to the port 2 also operate in the 1 λ mode.

With continuing reference to fig. 3A, when signals are fed to the feeding loop shown in (b) of fig. 3A and including two signal feeding points (e.g., port 1 and port 2), respectively, the conductive branch of the second layer may generate a resonance operating at 1 λ according to the simulation results of fig. 4-6. In addition, the second layer feed structure can excite the patch antenna provided in the first layer to radiate through spatial coupling, thereby generating another resonance.

Illustratively, in conjunction with FIG. 7, a variation of S11 for Port 1 before and after adding the patch antenna of the first layer is shown. As shown by the solid line in fig. 7, the feed structure of the second layer may produce a resonance (e.g., resonance 1) before adding the patch antenna. S11 for port 1 is shown in dashed lines after adding the patch antenna. It can be seen that after adding the patch antenna, a resonance 3 is created which the patch antenna radiates. Meanwhile, due to the loading effect of the patch antenna, frequency offset occurs in the resonance generated by the conductive branch corresponding to the port 1, for example, the resonance moves from the position corresponding to the resonance 1 to the position corresponding to the resonance 2. In this example, the position of the resonance 3 can be adjusted by adjusting the size of the patch antenna. The position of the resonance 2 is adjusted by adjusting the size of the port 1 corresponding to the conductive branch. The positions of the resonance 3 and the resonance 2 in the frequency domain are adjusted to be in the working frequency band, so that the effect of expanding the bandwidth is achieved.

For example, fig. 8 shows a comparison diagram of resonance positions corresponding to different patch antenna sizes. The side length of the patch antenna corresponding to S11-1 is 15mm, the side length of the patch antenna corresponding to S11-2 is 13mm, and the side length of the patch antenna corresponding to S11-3 is 10 mm. It can be seen that, as the size of the patch antenna decreases, the resonance corresponding to the patch antenna shifts to a high frequency, and finally, a resonance with a larger bandwidth, which is composed of the resonance of the patch antenna and the resonance corresponding to the conductive branch, as corresponding to S11-3, can be obtained.

It is understood that, in order to realize radiation of a corresponding frequency band, the length of the conductive branch corresponding to the port may be set according to the wavelength of the corresponding frequency band, for example, in order to enable the feed branch corresponding to the port 1 to operate at 5GHz-6GHz, the length of the branch corresponding to the port 1 may be set to an appropriate size between 1/2 or 1/4 or 1/4-1/2 of the wavelength corresponding to an intermediate frequency point (e.g., 5.5GHz) of 5GHz-6 GHz. Similarly, in order to make the feed stub corresponding to the port 2 operate at 5GHz-6GHz, the stub length corresponding to the port 2 may be set to an appropriate size between 1/2 or 1/4 or 1/4-1/2 of the wavelength corresponding to the intermediate frequency point (e.g., 5.5GHz) of 5GHz-6 GHz. In addition, the size of the patch antenna can be set, so that the patch antenna also works in a corresponding frequency band, and the effect of expanding the bandwidth is achieved. For example, in order to make the patch antenna of the first layer operate at 5GHz-6GHz, the length of the side of the patch antenna can be set to an appropriate size between 1/2 or 1/4 or 1/4-1/2 of the wavelength corresponding to the middle frequency point (e.g., 5.5GHz) of 5GHz-6 GHz. Through the arrangement, the resonance generated by the feed branch and the resonance generated by the patch antenna can be tuned at adjacent or mutually overlapped frequency domain positions, so that a wider frequency range can be covered.

Exemplarily, the antenna is applied to a 5G WIFI radiation scene, the patch of the first layer is of a square structure, and the maximum outer edges of the first layer and the second layer are both of a square structure. The effective radiation frequency band is 5GHz-6 GHz. Fig. 9 shows an antenna structure schematic operating in a 5G WIFI scenario. As shown in fig. 9, the first and second layer structures of the antenna may have a side length of 85 mm. In the first layer, the side length of the patch antenna may be 10 mm. In the second layer, the side length of the Chinese character tian-shaped feed loop may be 28.5mm, and the width of the conductive branch corresponding to each feed port may be 1.5 mm. The antenna having the structure shown in fig. 9 can obtain the return loss of S11-3 in fig. 8 at any one port when excitation is performed. It can be seen that the return loss of the S11 of the antenna at the break points at 5GHz and 6GHz exceeds-10 dB (near or exceeding-15 dB). Therefore, the radiation device has better radiation capability. In addition, the resonance generated by the two feeding ports respectively corresponds to the current of the conductive branch corresponding to each port and the current on the excitation patch antenna, and the conductive branches corresponding to the two ports are mutually vertical, so the currents on the conductive branches are mutually vertical; the currents on the two ports respectively excite the currents on the patch antenna through space coupling, so that the currents excited on the patch antenna by the two ports correspondingly have the characteristic of being perpendicular to each other. Therefore, the dual-polarization radiation characteristic of the dual port can be realized.

Illustratively, fig. 10 shows a simulation diagram of the efficiency of the antenna having the structure shown in fig. 9. As shown in fig. 10, the antenna structure provided by this example has higher efficiency, reaching-1 dB to-1.5 dB, and efficiency is even within-1 dB at some frequency points, compared with the direct feeding result (efficiency is about-3 dB to-5 dB) for patch antenna. Therefore, the requirement on efficiency under a 5G WIFI scene can be met.

It can be understood that the curves shown in fig. 5, fig. 7, fig. 8 and fig. 10 are all schematic diagrams corresponding to one port (e.g., port 1), and when signals are fed into two ports simultaneously, the radiation condition of the other port is similar to that, and the description thereof is omitted.

The utility model provides a when the antenna scheme was used in the 5G WIFI scene, near antenna can be provided with the reflecting plate to the radiation directivity of reinforcing antenna. For example, in conjunction with the structure shown in fig. 3A. The first layer and the second layer are provided on both surfaces of the substrate, respectively. Under the condition that sets up the reflecting plate with base plate distance 1/4 work wavelength length department, the utility model provides an antenna can have better directionality. For example, please refer to fig. 11. Fig. 11 (a) shows a pattern of the antenna in the case where the reflector is not provided. Fig. 11 (b) shows a pattern of the antenna when the reflector is provided. It can be seen that in the direction in which the reflective plate is arranged, most of the radiation is reflected. And in the direction opposite to the emitting plate, the gain in this direction is higher as seen by the directional pattern, and thus has better penetration ability. Therefore, the antenna can provide better 5G WIFI communication quality.

In the above examples, the first layer structure and the second layer structure are respectively described as rotationally symmetrical structures with respect to the center. For example, the center of the patch antenna of the first tier is located at the geometric center of the first tier, and for example, the center of the field feed of the second tier is located at the geometric center of the second tier.

In other implementations of the present application, the center of the patch antenna may also be at any position of the first layer structure, and similarly, the center of the field-shaped feed point may also be moved according to actual conditions. For example, referring to fig. 12, another antenna structure provided by the present invention is shown. The antenna may also include a two-layer structure (e.g., a first layer and a second layer). Fig. 12 (a) shows a top view of the first layer structure. Fig. 12 (b) shows a top view of the second layer structure. The first layer can be provided with unsettled patch antenna, and the second layer can be provided with the feed loop structure of field font. Unlike the structure shown in fig. 3A, in this antenna structure, the center of the patch antenna does not coincide with the center of the first layer structure. For example, the patch antenna may be located at the lower right corner as shown in fig. 12 (a). Similarly, the field-shaped feeding loop in the second layer structure may also be located at the lower right corner as shown in fig. 12 (b). Of course, the feed loop structure of patch antenna and field font can also be located other positions of first layer structure/second floor structure, the utility model discloses do not do the restriction to this.

With reference to the above descriptions of fig. 3A to fig. 12, it can be seen that when a patch antenna is disposed on the first layer structure, space coupling excitation can be achieved through the tian-shaped feeding ring of the second layer structure, and then the dual-polarization radiation effect is achieved.

In other implementations of the present application, the antenna disposed in the first layer may further include a plurality of patch antennas, or the antenna disposed in the first layer may also be other types of antennas (e.g., monopole antennas, dipole antennas, slot antennas, etc.). In the specific implementation, the selection can be flexibly selected according to the actual situation.

As an example, fig. 13 shows a schematic structural diagram of another antenna provided in the present application. For example, the first layer structure is provided with 4 patch antennas.

As shown in fig. 13, in this example, the first layer structure and the second layer structure may each have a side length of 55 mm. The 4 patch antennas in the first layer structure may each be a square structure. The side length of each patch antenna can be 7.8mm, and the gap between two adjacent patch antennas is 1 mm. In the second layer of structure, the side length of each square non-conductive region included in the field-shaped feed ring may be 13.5mm, and the width of the corresponding conductive branch may be 13.5 mm.

The antenna with the structure has good bandwidth and efficiency through electromagnetic simulation, and can fully meet the communication requirement of a 5G WIFI frequency band.

Fig. 14 is a schematic diagram illustrating simulation of S-parameters of the antenna having the structure shown in fig. 13. As shown in FIG. 14, the return loss is below-10 dB in the 5G WIFI effective frequency range (5GHz-6 GHz). The isolation of the two ports is basically below-160 dB, so that the two signals are basically not influenced by each other in the process of dual-polarized radiation (for example, in the transmission and reception of two signals used in a Multiple-Input Multiple-Output (MIMO) system).

Based on the S-parameter example shown in fig. 14, fig. 15 shows the corresponding efficiency simulation results. It can be seen that, after S11 is adjusted to the frequency band corresponding to 5GHz-6GHz, the efficiency of port 1 and port 2 in the full frequency band is about-1.5 dB. Therefore, the requirements of the 5G WIFI frequency band on bandwidth and efficiency can be met.

In addition, it can be seen from the electromagnetic simulation that the antenna having the composition shown in fig. 13 has a gain to the directional pattern in the normal direction (simply referred to as the normal direction) increased correspondingly after the addition of the reflector. The pattern distribution after adding the reflector is shown in fig. 16. Since the normal gain is increased after the addition of the reflection plate, it is possible to provide a better wall penetration capability. In some scenarios, when the antenna is disposed in a router or the like, a better communication experience can be provided.

Claims (6)

1. A dual polarized antenna, characterized in that it comprises:

a first radiating structure, and a first feed structure;

the first radiation structure is projected to coincide with the first feed structure;

the first radiating structure comprises at least one radiator;

the first feed structure comprises a Chinese character 'tian' -shaped feed structure, and the Chinese character 'tian' -shaped feed structure comprises four conductive branches and peripheral conductive structures which are respectively communicated with the outer sides of the four conductive branches;

the inner sides of the four conductive branches are arranged in pairs in an opposite mode, and the two conductive branches arranged in the opposite mode form a feed structure.

2. The dual polarized antenna of claim 1, wherein the four conductive branches are distributed with 90 ° rotational symmetry with respect to a geometric center of the first feed structure.

3. A dual polarized antenna according to claim 1 or 2, wherein the first radiating structure comprises a first patch antenna having a center coinciding with a geometric center of the first radiating structure; the peripheral perimeter of the first patch antenna is between one quarter and one half of the wavelength of the working frequency band of the dual-polarized antenna.

4. A dual polarized antenna according to claim 1 or 2, characterized in that the first radiating structure comprises four second patch antennas, which are distributed with 90 ° rotational symmetry with respect to the geometric center of the first radiating structure.

5. The dual polarized antenna of claim 4, wherein the second patch antenna is square, and the side length of the second patch antenna corresponds to one eighth of the wavelength of the operating frequency band of the dual polarized antenna.

6. A dual polarized antenna according to claim 1, 2 or 5, characterized in that a perpendicular projection of the feed structure provided on the first feed structure onto the plane of the first radiation structure coincides with at least part of at least one radiator comprised by the first radiation structure.

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