CN219959428U - Antenna structure and communication device - Google Patents

Abstract

The application provides an antenna structure and a communication device, wherein the antenna structure comprises a first radiation unit and a second radiation unit; the radiation frequency of the first radiation unit is lower than that of the second radiation unit, the first radiation unit and the second radiation unit are arranged at intervals in a lamination manner in the thickness direction of the second radiation unit, and the orthographic projection of the first radiation unit towards the second radiation unit at least partially shields the second radiation unit; the first radiation unit is provided with a plurality of first frequency selection surfaces for transmitting electromagnetic waves emitted from the second radiation unit to the first radiation unit. The antenna structure provided by the application can prevent the first radiation unit from interfering electromagnetic waves emitted by the second radiation unit, and reduce the mutual coupling strength between the first radiation unit and the second radiation unit, so that the antenna structure can realize broadband out-of-band transmission while having broadband radiation.

Description

Antenna structure and communication device

Technical Field

The embodiment of the application relates to the technical field of antenna equipment, in particular to an antenna structure and a communication device.

Background

Because the antenna resources of the base station antenna are very limited, in order to reduce the cost and save the space, the base station antenna is generally required to be integrated.

In the prior art, a multi-frequency aperture shared base station antenna is adopted to realize co-station co-location of antennas of a plurality of working frequency bands, an antenna structure in the base station antenna is provided with a plurality of antenna structures, at least one array formed by a plurality of radiating units is arranged under each working frequency band, the radiating frequencies of the radiating units in the arrays of the working frequency bands are different, and the arrays of the antenna structures are all fed and connected through a feed network, so that the base station antenna can work under the plurality of working frequency bands.

However, there is strong mutual coupling between the radiating elements at different operating frequency bands in the above-mentioned related art antenna structure, thereby affecting the performance of the antenna structure.

Disclosure of Invention

The embodiment of the utility model provides an antenna structure and a communication device, which can solve the technical problem that the performance of the antenna structure is affected by strong mutual coupling among radiation units in different working frequency bands in the antenna structure in the related art.

In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions:

a first aspect of an embodiment of the present utility model provides an antenna structure, including a first radiating element and a second radiating element; the radiation frequency of the first radiation unit is lower than that of the second radiation unit, and the first radiation unit and the second radiation unit are arranged at intervals in the thickness direction of the second radiation unit; the first radiation unit is provided with a plurality of first frequency selection surfaces for transmitting electromagnetic waves emitted from the second radiation unit to the first radiation unit.

The embodiment of the application provides an antenna structure and a communication device, wherein the first radiation unit and the second radiation unit with different working frequencies are arranged in the antenna structure, so that broadband radiation of the antenna structure can be realized, and the plurality of first frequency selection surfaces are arranged on the first radiation unit with lower radiation frequency in the antenna structure, so that electromagnetic waves emitted by the second radiation unit to the first radiation unit are transmitted from the first radiation unit, thereby avoiding interference of the first radiation unit with electromagnetic waves emitted by the second radiation unit, reducing the mutual coupling strength between the first radiation unit and the second radiation unit, realizing broadband out-of-band transmission while the antenna structure has broadband radiation, and improving the performance of the antenna structure.

In a possible implementation, the maximum dimension of the first frequency selective surface is λ, which is a wavelength corresponding to the center frequency of the resonance frequency of the second radiating element, which is less than or equal to one tenth.

By setting the maximum size of the first frequency selective surface to λ of one tenth or less, the first frequency selective surface can be enabled to reduce the influence of the first frequency selective surface on electromagnetic waves radiated from the first radiation unit while being capable of ensuring that electromagnetic waves radiated from the second radiation unit are transmitted from the first radiation unit, so that the operation stability of the first radiation unit can be ensured.

In one possible implementation, the first radiating element includes a first substrate, a first radiating arm, and a first feed structure; the first radiation arm is arranged on the first substrate, and a plurality of first frequency selection surfaces are arranged on the surface of the first radiation arm; the first feed structure is electrically connected to the first radiating arm.

By mounting the first radiating arm on the first substrate, the mounting stability of the first radiating arm can be improved, and the first frequency selective surface is arranged on the first radiating arm, so that electromagnetic waves emitted to the first radiating arm by the second radiating element can be transmitted out through the first frequency selective surface, the influence of the first radiating arm on the second radiating element is reduced, and the performance of the antenna structure is improved.

In one possible implementation, the first radiating arm includes a first surface and a second surface disposed opposite each other, the first surface facing the second radiating element; at least one of the first surface and the second surface has a plurality of first frequency selective surfaces disposed thereon.

By providing a plurality of first frequency selective surfaces on at least one of the first surface facing the second radiating element on the first radiating arm and the second surface opposite to the first surface, the flexibility of the arrangement of the first frequency selective surfaces on the first radiating arm can be improved. By providing a plurality of first frequency selective surfaces on both the first surface of the first radiation arm facing the second radiation unit and on the second surface opposite to the first surface, the transmission ability of the first frequency selective surfaces to transmit electromagnetic waves emitted from the second radiation unit to the first radiation unit can be improved as compared with when a plurality of first frequency selective surfaces are provided on only one of the first surface and the second surface.

In one possible implementation, the first substrate includes a first mounting surface and a second mounting surface disposed opposite to each other, the first mounting surface facing the second radiating element; the number of the first radiation arms is one or more; when the number of the first radiation arms is one, the first radiation arms are arranged on the first mounting surface or the second mounting surface.

By arranging the first radiation arm on the first mounting surface or the second mounting surface of the first substrate, the mounting flexibility of the first radiation arm on the first substrate can be improved, and the assembly flexibility of the antenna structure is improved.

In one possible implementation, when the number of the first radiation arms is two, the two first radiation arms are electrically connected, and the two first radiation arms are arranged in the thickness direction of the first radiation arms; one of the first radiating arms is arranged on the first mounting surface, and the other first radiating arm is arranged on the second mounting surface.

By arranging the two first radiation arms, one of the two first radiation arms is arranged on the first mounting surface of the first substrate, and the other of the two first radiation arms is arranged on the second mounting surface of the first substrate, the radiation capacity of the first radiation unit can be improved, and the radiation performance of the antenna structure on electromagnetic wave signals can be improved.

In one possible implementation manner, the number of the first radiating arms is three, and the number of the first substrates is two, wherein one first radiating arm is respectively arranged on the first mounting surface and the second mounting surface of one first substrate, and one first radiating arm is arranged on the first mounting surface or the second mounting surface of the other first substrate.

By arranging three first radiating arms and arranging two first base plates, one first radiating arm is arranged on the first mounting surface and one first radiating arm is arranged on the second mounting surface of one first base plate, and one first radiating arm is arranged on the first mounting surface or the second mounting surface of the other first base plate, so that the radiation capacity of the first radiating unit on electromagnetic waves and the performance of the antenna structure can be further improved.

In one possible implementation, the first radiating arm includes a plurality of first radiating branches and first connectors, one end of each first radiating branch being connected to a first connector, the first connector being electrically connected to the first feed structure; each first radiation branch comprises a first radiation surface and a second radiation surface which are oppositely arranged, and the first radiation surfaces face to the second radiation unit; at least one of the first radiation surface and the second radiation surface is provided with a plurality of first frequency selective surfaces.

In one possible implementation, the orthographic projections of the plurality of first frequency selective surfaces toward the first radiating arm all fall within the first radiating arm.

By having all orthographic projections of the plurality of first frequency selective surfaces towards the first radiating arm fall within the first radiating arm, it is possible to avoid that the first frequency selective surfaces extend beyond the outer edge of the first radiating arm, whereby it is possible to avoid that parts of the first frequency selective surfaces extending beyond the outer edge of the first radiating arm or parts of the structures of the first frequency selective surfaces influence electromagnetic waves radiated on the first radiating arm. The working stability of the first radiating element is improved, and the working stability of the antenna structure is further improved.

In a possible implementation, the pattern formed by the surface of the orthographic projection of the first frequency selective surface towards the first radiating element is a centrosymmetric pattern; the first frequency selective surface includes a plurality of first branches disposed about a center of an orthographic projection of the first frequency selective surface, the plurality of first branches being symmetrical about the center.

In one possible implementation, the antenna structure further comprises a third radiating element; the radiation frequency of the third radiation unit is smaller than that of the first radiation unit, and the third radiation unit and the first radiation unit are arranged at intervals in the thickness direction of the first radiation unit; the third radiating element is provided with a plurality of second frequency selective surfaces for transmitting electromagnetic waves emitted from the first radiating element and the second radiating element to the third radiating element.

The bandwidth of broadband radiation of the antenna structure can be further improved through the third radiation unit, the radiation frequency of which is smaller than that of the first radiation unit, arranged in the antenna structure, and the electromagnetic waves emitted by the first radiation unit and the second radiation unit to the third radiation unit are transmitted through the third radiation unit through the plurality of second frequency selection surfaces arranged on the third radiation unit, so that the electromagnetic waves emitted by the first radiation unit are prevented from being blocked by the third radiation unit, the mutual coupling strength between the third radiation unit and the first radiation unit is reduced, and the performance of the antenna structure is improved.

In a possible implementation, the maximum dimension of the second frequency selective surface is γ, which is a tenth or less of a wavelength corresponding to the center frequency of the resonance frequency of the first radiating element.

By setting the maximum size of the second frequency selective surface to γ which is one tenth or less, the first frequency selective surface can be made to be able to reduce the influence of the first frequency selective surface on the electromagnetic wave radiated from the first radiating element while being able to ensure that the electromagnetic wave radiated from the second radiating element is transmitted out from the first radiating element, so that the operation stability of the first radiating element can be ensured.

In one possible implementation, the third radiating element includes a third substrate, a third radiating arm, and a third feed structure; the third radiation arm is arranged on the third substrate, and a plurality of second frequency selection surfaces are arranged on the surface of the third radiation arm; the third feed structure is electrically connected to the third radiating arm.

By mounting the third radiating arm on the third substrate, the mounting stability of the third radiating arm can be improved, and the second frequency selective surface is arranged on the third radiating arm, so that electromagnetic waves emitted to the third radiating arm by the first radiating element and the second radiating element can be transmitted out through the second frequency selective surface, the influence of the third radiating arm on the first radiating element is reduced, and the performance of the antenna structure is improved.

In one possible implementation, the third radiating arm includes a third surface and a fourth surface disposed opposite to each other, the third surface facing the first radiating element; at least one of the third surface and the fourth surface is provided with a plurality of second frequency selective surfaces.

By providing a plurality of second frequency selective surfaces on at least one of the third surface facing the first radiating element on the third radiating arm and the fourth surface opposite to the third surface, the flexibility of the arrangement of the second frequency selective surfaces on the third radiating arm can be improved. By providing a plurality of second frequency selective surfaces on the third surface facing the first radiation unit on the third radiation arm, and on the fourth surface opposite to the third surface, the transmission ability of the second frequency selective surfaces to transmit electromagnetic waves of the first radiation unit and the second radiation unit to the third radiation unit can be improved as compared with when a plurality of second frequency selective surfaces are provided on only one of the third surface and the fourth surface.

In one possible implementation, the antenna structure has a plurality of first radiating elements, a plurality of second radiating elements, and a plurality of third radiating elements; the plurality of first radiating elements together form at least one first radiating array, the plurality of second radiating elements together form at least one second radiating array, and the plurality of third radiating elements together form at least one third radiating array.

By arranging at least one first radiating array formed by a plurality of first radiating elements in the antenna structure, the radiation intensity of the working frequency band where the first radiating elements are located in the antenna structure can be improved. Similarly, the at least one second radiating array formed by the plurality of second radiating elements in the antenna structure can improve the radiation intensity of the working frequency band where the second radiating elements in the antenna structure are located. Further, at least one third radiating array formed by a plurality of third radiating elements is arranged in the antenna structure, so that the radiation intensity of the working frequency band where the third radiating elements are located in the antenna structure can be improved.

In one possible implementation, the antenna structure further comprises a reflector, the front projection of the first radiating element towards the reflector, the front projection of the second radiating element towards the reflector and the front projection of the third radiating element towards the reflector all falling within the reflector.

By arranging the reflector, the orthographic projection of the first radiation unit towards the reflector, the orthographic projection of the second radiation unit towards the reflector and the orthographic projection of the third radiation unit towards the reflector are all located in the reflector, and electromagnetic waves emitted by the radiation units in the antenna structure can radiate according to the reflection direction set by the reflector.

A second aspect of the embodiments of the present application provides a communication device, which includes a plurality of feeding networks, and an antenna structure as described above, wherein a first radiating element in the antenna structure is electrically connected to one of the feeding networks, and a second radiating element in the antenna structure is electrically connected to the other feeding network.

The embodiment of the application provides an antenna structure and a communication device, wherein the communication device is characterized in that a first radiation unit in the antenna structure is connected with one feed network of a plurality of feed networks, and a second radiation unit in the antenna structure is connected with the other feed network feed, so that the first radiation unit and the second radiation unit can both receive and transmit electromagnetic waves through the feed networks connected with the feeds, and the service performance of the communication device can be improved.

In one possible implementation, the communication device includes an antenna structure housing, and the antenna structure and the plurality of feed networks are disposed within the antenna structure housing.

Through setting up communication device in antenna structure cover, can protect the communication device who sets up in its inside through antenna structure cover, reduce communication device and take place the probability of damaging because of receiving the impact to communication device's life has been improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of an antenna structure according to an embodiment of the present application;

FIG. 2 is a pattern of the H-plane of the second radiating element before and after the addition of the first frequency selective surface to the first radiating element;

FIG. 3 is a pattern of the V-face of the second radiating element before and after the addition of the first frequency selective surface to the first radiating element;

FIG. 4 is a graph of return loss when the second radiating element is directly below the first radiating element and the second radiating element is laterally below the first radiating element;

FIG. 5 is a return loss plot of two polarizations of a first radiating element of a cross dipole radiating structure formed by four first radiating branches provided with a first frequency selective surface;

FIG. 6 is a schematic view of a first radiating surface of a first radiating stub having a first frequency selective surface disposed therein;

FIG. 7 is a schematic diagram of a second radiation surface of the first radiation branch in FIG. 6;

fig. 8 is a schematic diagram of another antenna structure according to an embodiment of the present application;

FIG. 9A is a schematic diagram of a first frequency selective surface;

FIG. 9B is a schematic diagram of a second first frequency selective surface;

FIG. 9C is a schematic diagram of a third first frequency selective surface;

FIG. 9D is a schematic diagram of a fourth first frequency selective surface;

FIG. 9E is a schematic diagram of a fifth first frequency selective surface;

fig. 9F is a schematic structural diagram of a sixth first frequency selective surface;

fig. 9G is a schematic structural diagram of a seventh first frequency selective surface;

FIG. 9H is a schematic diagram of a structure of an eighth first frequency selective surface;

fig. 9I is a schematic structural diagram of a ninth first frequency selective surface;

FIG. 9J is a schematic diagram of a tenth first frequency selective surface;

Fig. 10 is a schematic diagram of a communication device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication base station according to an embodiment of the present application.

Reference numerals illustrate:

100-communication means;

a 101-feed network; 102-a phase shifting network; 103-a calibration network; 104-a filter; 105-antenna joint;

106-antenna structure cover;

10-antenna structure;

110-a first radiating element;

111-a first substrate; 112-a first radiating arm; 113-a first feed structure;

1111-a second mounting surface; 1121-a second surface; 1122-first radiation branch; 1123-a first connector;

1124-first radiating face; 1125-a second radiating surface;

120-a second radiating element;

121-a second substrate; 122-a second radiating arm; 123-a second feed structure;

1211-sixth mounting surfaces; 1221-a second radiation branch; 1222-a second connector;

130-a first frequency selective surface;

131-a first leg;

140-a third radiating element;

141-a third substrate; 142-a third radiating arm; 143-a third feed structure;

1411-fourth mounting surfaces; 1421-fourth surfaces; 1422-third radiating branches; 1423-a third connector;

150-a second frequency selective surface;

160-a reflector;

200-supporting rods;

300-adjusting the bracket;

400-joint seal;

500-grounding means.

Detailed Description

As described in the background art, since antenna structure has very limited antenna resources, the development of the antenna structure of the fifth generation mobile communication technology (5th generation mobile communication technology,5G) tends to be integrated and realize full-frequency coverage below 5G in order to reduce cost and save space. In this context, the antenna structure of the multi-frequency aperture shared antenna array becomes one of the better choices for implementing the convergence of the second-generation mobile communication technology (2th generation mobile communication technology,2G) to the fifth-generation mobile communication technology base station. However, there is strong mutual coupling between the radiating elements at different operating frequency bands in the above-mentioned related art antenna structure, thereby affecting the performance of the antenna structure. The reason for this problem is that, in this antenna structure, since the array structure is compact, the array units composed of the radiation units in different frequency bands are arranged in a staggered manner, and since the radiation surface of the high-frequency radiation unit is smaller than that of the low-frequency radiation unit, and the radiation surface of the high-frequency radiation unit is located below the radiation surface of the low-frequency radiation unit, the orthographic projection portion of the low-frequency radiation unit, which faces the high-frequency radiation unit, even completely shields the radiation surface of the high-frequency radiation unit, the high-frequency radiation unit is easily affected by the low-frequency radiation unit when radiating electromagnetic waves, so that strong mutual coupling between the radiation units working in different frequency bands can cause serious distortion of the pattern of the high-frequency radiation unit, broadband radiation and broadband out-of-band transmission of the antenna structure cannot be realized, and the performance of the antenna structure is affected.

In view of the above technical problems, embodiments of the present application provide an antenna structure and a communication device, in which a first radiation unit and a second radiation unit with different operating frequencies are disposed in the antenna structure, so that broadband radiation of the antenna structure can be achieved, and in which a plurality of first frequency selective surfaces are disposed on a first radiation unit with a lower radiation frequency in the antenna structure, so that electromagnetic waves emitted from the second radiation unit to the first radiation unit are transmitted from the first radiation unit, thereby avoiding interference of the first radiation unit with electromagnetic waves emitted from the second radiation unit, reducing the strength of mutual coupling between the first radiation unit and the second radiation unit, and enabling broadband out-of-band transmission of the antenna structure while having broadband radiation, and improving performance of the antenna structure.

In order to make the above objects, features and advantages of the embodiments of the present application more comprehensible, the technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Referring to fig. 1, a first aspect of the embodiment of the present application provides an antenna structure 10, where the antenna structure 10 may include a first radiating element 110 and a second radiating element 120, and the first radiating element 110 and the second radiating element 120 may operate in different frequency bands, so that the antenna structure 10 may operate in two operating frequency bands, and the operating bandwidth of the antenna structure 10 is improved.

In some examples, the antenna structure may have a plurality of first radiating elements 110 and a plurality of second radiating elements 120 therein, and the number of first radiating elements 110 and the number of second radiating elements 120 may be the same. The plurality of first radiating elements 110 can form at least one first radiating array with respect to the first radiating elements 110, e.g., the plurality of first radiating elements 110 can form one first radiating array or two first radiating arrays. Similarly, the plurality of second radiating elements 120 can form at least one second radiating array with respect to the second radiating elements 120, e.g., the plurality of second radiating elements 120 can form one second radiating array or two second radiating arrays. By providing at least one first radiating array formed by a plurality of first radiating elements 110 in the antenna structure 10 and at least one second radiating array formed by a plurality of second radiating elements 120 in the antenna structure 10, the radiation intensity of the operating frequency band in which each of the first radiating elements 110 and the second radiating elements 120 in the antenna structure 10 is located can be improved.

Referring to fig. 1, in a specific implementation, the radiation frequency of the first radiation unit 110 is lower than the radiation frequency of the second radiation unit 120, the first radiation unit 110 and the second radiation unit 120 are spaced apart in the thickness direction of the second radiation unit 120 (e.g., the first radiation unit 110 and the second radiation unit 120 have a certain height in the height direction thereof in fig. 1), and since the radiation frequency of the first radiation unit 110 is lower than the radiation frequency of the second radiation unit 120, the radiation surface of the second radiation unit 120 is smaller than the radiation surface of the first radiation unit 110, and the second radiation unit 120 is located below the first radiation unit 110. In order to improve the integration level of the antenna structure 10, the first radiation unit 110 and the second radiation unit 120 may be arranged in such a manner that the first radiation unit 110 and the second radiation unit 120 are closely adjacent to each other in a horizontal direction, that is, the orthographic projection of the first radiation unit 110 toward the second radiation unit 120 is adjacent to the second radiation unit, or the second radiation unit 120 is arranged directly under or obliquely under the first radiation unit 110, that is, the orthographic projection of the first radiation unit 110 toward the second radiation unit 120 at least partially shields the second radiation unit 120. When the first radiation unit 110 and the second radiation unit 120 are disposed in a relatively concentrated manner, the first radiation unit 110 may interfere with or block the electromagnetic wave radiated by the second radiation unit 120 from propagating to the surrounding. And a plurality of first frequency selective surfaces 130 are disposed on the first radiation unit 110, and electromagnetic waves emitted from the second radiation unit 120 to the first radiation unit 110 can be transmitted through the first frequency selective surfaces 130, thereby reducing the influence of the first radiation unit 110 on the operation of the second radiation unit 120.

Referring to fig. 2 and 3, the patterns indicated by the reference symbol X in fig. 2 and 3 are patterns of the second radiating element 120 on the H-plane and the V-plane when the plurality of first frequency selective surfaces 130 are provided on the first radiating element 110, and the patterns indicated by the reference symbol Y in fig. 2 and 3 are patterns of the second radiating element 120 on the H-plane and the V-plane when the first frequency selective surfaces 130 are not provided on the first radiating element 110, so that it can be seen that the distortion degree of the patterns of the H-plane and the V-plane indicated by the reference symbol X is significantly smaller than the distortion degree of the patterns of the H-plane and the V-plane indicated by the reference symbol Y, and thus, the distortion degree of the patterns of the second radiating element 120 can be effectively reduced by providing the first frequency selective surfaces 130 on the first radiating element 110, so that the problem of strong mutual coupling between the first radiating element 110 and the second radiating element 120 can be reduced.

Referring to fig. 4, the return loss of the second radiation unit 120 when the first radiation unit 110 is provided with the first frequency selective surface 130 is as shown in fig. 4, L1 in fig. 4 is a return loss graph when the second radiation unit 120 is located below the first radiation unit 110 side, and as known from L1, the return loss of the second radiation unit 120 is less than-10 dB in the frequency range from 3GHz to 4GHz, that is, when the first radiation unit 110 is provided with the first frequency selective surface 130, and the second radiation unit 120 is located below the first radiation unit 110 side, the second radiation unit 120 exhibits better radiation performance, the shielding effect of the first radiation unit 110 on the second radiation unit 120 is reduced, and the radiation performance of the second radiation unit 120 is improved. In fig. 4, L2 is a graph of return loss when the second radiating element 120 is located directly under the first radiating element 110, and it is known from L2 that, in a frequency range from 3.2GHz to 3.9GHz, the return loss of the second radiating element 120 is less than-10 dB and can be as low as-35 dB, that is, when the first radiating element 110 is provided with the first frequency selecting surface 130, even if the second radiating element 120 is located directly under the first radiating element 110, the second radiating element 120 still exhibits good radiation performance, and thus, by providing the first frequency selecting surface 130 on the first radiating element 110, the influence of the first radiating element 110 on the second radiating element 120 can be significantly improved, and the radiation performance of the antenna structure 10 is improved.

Referring to fig. 5, the return loss of the first radiating element 110 when the first frequency selective surface 130 is disposed on the first radiating element 110 is as shown in fig. 5, in which fig. 5 is a return loss diagram of the first radiating element 110 with a cross dipole structure composed of dipole moments of positive 45 degrees and negative 45 degrees, L3 is a return loss curve of dipole moment of negative 45 degrees in the cross dipole, L4 is a return loss curve of dipole moment of positive 45 degrees in the cross dipole, and as can be seen from L3 and L4, the return loss of both dipole moments on the first radiating element 110 is lower than-10 dB in a wide range, for example, the return loss of the first radiating element 110 is lower than-10 dB in most of the operating frequencies in the frequency range of 1.5GHz to 3 GHz. It follows that the operation of the first radiating element 110 is not adversely affected by the provision of the first frequency selective surface 130 on the first radiating element 110.

It should be noted that, in the present application, the first frequency selective surface 130 can be etched on the first radiation unit 110 by etching, and the first frequency selective surface 130 and the first radiation unit 110 are formed as an integral structure. The first frequency selective surface 130 may also be attached to the first radiating element 110 by means of a metal patch. The plurality of first frequency selective surfaces 130 are uniformly distributed on the surface of the first radiation unit 110 in an array, two adjacent first frequency selective surfaces 130 can be connected with each other, and the first frequency selective surfaces 130 can be disposed on the whole area of the radiation surface of the first radiation unit 110, so as to reduce the influence of the area on the radiation surface of the first radiation unit 110, where the first frequency selective surfaces 130 are not disposed, on the electromagnetic wave radiated by the second radiation unit 120.

The embodiment of the application provides an antenna structure 10 and a communication device 100, wherein a first radiation unit 110 and a second radiation unit 120 with different working frequencies are arranged in the antenna structure 10, so that broadband radiation of the antenna structure 10 can be realized, and a plurality of first frequency selection surfaces 130 are arranged on the first radiation unit 110 with lower radiation frequency in the antenna structure 10, so that electromagnetic waves emitted by the second radiation unit 120 to the first radiation unit 110 are transmitted from the first radiation unit 110, thereby avoiding interference of the first radiation unit 110 with electromagnetic waves emitted by the second radiation unit 120, reducing the mutual coupling strength between the first radiation unit 110 and the second radiation unit 120, realizing broadband out-of-band transmission of the antenna structure 10 while broadband radiation is realized, and improving the performance of the antenna structure 10.

In some embodiments, the maximum dimension of the first frequency selective surface is λ, which is a wavelength corresponding to a center frequency of the resonant frequency of the second radiating element 120, which is one tenth or less. It is understood that the center frequency is the frequency corresponding to the resonance strongest point. Bandwidth is understood to be a range of frequencies on either side of the center frequency, where the antenna characteristics are within an acceptable range of values for the center frequency. The wavelength may be a wavelength corresponding to a center frequency of the resonant frequency or a center frequency of an operating frequency band supported by the antenna, by setting the maximum size of the first frequency selection surface 130 to λ which is one tenth or less, the first frequency selection surface 130 can reduce an influence of the first frequency selection surface 130 on electromagnetic waves radiated by the first radiation unit 110 while enabling transmission of electromagnetic waves radiated by the second radiation unit 120 from the first radiation unit 110, thereby enabling operation stability of the first radiation unit 110 to be ensured.

In some examples, when the maximum size of the first frequency selective surface 130 is less than or equal to one tenth λ, the operating relative bandwidth of the first radiating element 110 can reach more than 60%, which can enable the antenna structure 10 to be applied to a wider bandwidth application scenario. In another embodiment, when the maximum size of the first frequency selective surface 130 is less than or equal to eighth λ, the operation relative bandwidth of the first radiating element 110 can reach more than 30%, so that the antenna structure 10 can be applied to a narrower bandwidth application scenario. It can be seen that the antenna structure 10 can be improved in performance of the antenna structure 10 under different bandwidths according to the change of the size of the first frequency selective surface 130 disposed on the first radiating element 110.

Referring to fig. 1, the first radiating element may include a first substrate 111, a first radiating arm 112, and a first feeding structure 113, the first radiating arm 112 being disposed on the first substrate 111, a plurality of first frequency selective surfaces 130 being disposed on a surface of the first radiating arm 112, the first feeding structure 113 being electrically connected with the first radiating arm 112. The first feed structure 113 may be a feed structure having a certain supporting capability so as to support the first radiating arm 112 and the first substrate 111. By mounting the first radiating arm 112 on the first substrate 111, the mounting stability of the first radiating arm 112 can be improved, and the first frequency selective surface 130 is provided on the first radiating arm 112, electromagnetic waves emitted from the second radiating element 120 to the first radiating arm 112 can be transmitted through the first frequency selective surface 130, so that the influence of the first radiating arm 112 on the second radiating element 120 can be reduced, thereby improving the performance of the antenna structure 10.

Referring to fig. 1, the orthographic projections of the plurality of first frequency selective surfaces 130 toward the first radiating arm 112 fall within the first radiating arm 112. By having the orthographic projections of the plurality of first frequency selective surfaces 130 towards the first radiating arm 112 all fall within the first radiating arm 112, it is possible to avoid that the first frequency selective surfaces 130 extend beyond the outer edges of the first radiating arm 112, whereby a part of the first frequency selective surfaces 130 or a part of the structure of the first frequency selective surfaces 130 extending beyond the outer edges of the first radiating arm 112 can be avoided from affecting electromagnetic waves radiated on the first radiating arm 112. The operational stability of the first radiating element 110 and thus the antenna structure 10 is improved.

With continued reference to fig. 1, the first radiating arm may include oppositely disposed first and second surfaces 1121, the first surface facing the second radiating element 120, at least one of the first and second surfaces 1121 having a plurality of first frequency selective surfaces 130 disposed thereon. In particular implementations, the first frequency selective surface 130 can be disposed on the first surface of the first radiating arm 112, the first frequency selective surface 130 can also be disposed on the second surface 1121 of the first radiating arm 112, and the first frequency selective surface 130 can also be disposed on both the first surface and the second surface 1121 of the first radiating arm 112.

By providing the plurality of first frequency selective surfaces 130 on at least one of the first surface facing the second radiating element 120 on the first radiating arm 112 and the second surface 1121 opposite to the first surface, the flexibility of the arrangement of the first frequency selective surfaces 130 on the first radiating arm 112 can be improved. By providing the plurality of first frequency selective surfaces 130 on the first surface of the first radiation arm 112 facing the second radiation unit 120 and on the second surface 1121 opposite to the first surface, the transmission ability of the first frequency selective surfaces 130 to transmit electromagnetic waves emitted from the second radiation unit 120 to the first radiation unit 110 can be improved as compared with when the plurality of first frequency selective surfaces 130 are provided on only one of the first surface and the second surface 1121.

With continued reference to fig. 1, in some examples, the first substrate 111 includes a first mounting surface and a second mounting surface 1111 disposed opposite to each other, the first mounting surface facing the second radiating element 120. The number of the first radiation arms 112 is one or plural, and when the number of the first radiation arms 112 is one, the first radiation arms 112 are provided on the first mounting surface or the second mounting surface 1111. By providing the first radiation arm 112 on the first mounting surface or the second mounting surface 1111 of the first substrate 111, the mounting flexibility of the first radiation arm 112 on the first substrate 111 can be improved, thereby improving the assembly flexibility of the antenna structure 10.

In one possible implementation, the number of first radiating arms may be two, and the two first radiating arms 112 are electrically connected, and the two first radiating arms 112 are arranged in the thickness direction of the first radiating arms 112. One of the first radiation arms 112 is provided on the first mounting surface, and the other one of the first radiation arms 112 is provided on the second mounting surface 1111, and the two first radiation arms 112 are indirectly contacted in the thickness direction of the first radiation arm 112 through the first substrate 111. In specific use, only one of the first radiation arms 112 needs to be fed, so that the radiation of electromagnetic waves on the two first radiation arms 112 can be realized. By providing two first radiation arms 112, and mounting one of the two first radiation arms 112 on the first mounting surface of the first substrate 111 and mounting the other of the two first radiation arms 112 on the second mounting surface 1111 of the first substrate 111, the radiation capability of the first radiation unit 110 can be improved, and the radiation performance of the antenna structure 10 on electromagnetic wave signals can be further improved.

In another possible implementation, the number of the first radiating arms 112 may be three, and the number of the first substrates 111 is two, where one first radiating arm 112 is disposed on the first mounting surface and the second mounting surface 1111 of one first substrate 111, and one first radiating arm 112 is disposed on the first mounting surface or the second mounting surface 1111 of the other first substrate 111. It is understood that the two first substrates 111 are connected by a connection structure, or the two first substrates 111 may be directly bonded in the thickness direction. By providing three first radiation arms 112 and providing two first substrates 111 such that one first radiation arm 112 is provided on each of the first mounting surface and the second mounting surface 1111 of one first substrate 111, and one first radiation arm 112 is provided on each of the first mounting surface or the second mounting surface 1111 of the other first substrate 111, the radiation capability of the first radiation unit 110 to electromagnetic waves and the performance of the antenna structure 10 can be further improved.

Referring to fig. 1, 6 and 7, the first radiating arm may include a plurality of first radiating branches 1122 and first connectors 1123, one end of each first radiating branch 1122 being connected to a first connector 1123, the first connector 1123 being electrically connected to the first feeding structure 113. Each of the first radiating branches 1122 may include a first radiating surface 1124 and a second radiating surface 1125 disposed opposite to each other, the first radiating surface 1124 facing the second radiating element 120, and a plurality of first frequency selective surfaces 130 disposed on at least one of the first radiating surface 1124 and the second radiating surface 1125. In some embodiments, the first radiating arm 112 may include four first radiating branches 1122, where the four first radiating branches 1122 are symmetrically disposed two by two, and an included angle between each adjacent two of the first radiating branches 1122 may be 45 °, and the four first radiating branches 1122 may form a cross dipole radiating structure. At least one of the first and second radiating surfaces of each first radiating branch 1122 has a plurality of first frequency selective surfaces 130 disposed thereon. The number of first frequency selective surfaces 130 that can be provided on each first radiating branch 1122 may be 15, 20, or even more.

Referring to fig. 8, in a specific implementation, the antenna structure may further include a third radiating element 140, the radiating frequency of the third radiating element 140 is smaller than the radiating frequency of the first radiating element 110, the third radiating element 140 and the first radiating element 110 are spaced apart in the thickness direction of the first radiating element 110 (for example, the first radiating element 110 and the third radiating element 140 have a certain height spacing in the height direction thereof in fig. 8), the first radiating element 110 and the third radiating element 140 may be disposed in close proximity, that is, the orthographic projection of the third radiating element 140 toward the first radiating element 110 is adjacent to the first radiating element 110, or the third radiating element 140 is disposed in a lamination spacing in the height direction with the first radiating element 110, for example, the orthographic projection of the third radiating element 140 toward the first radiating element 110 at least partially shields the first radiating element 110. The third radiating unit 140 is provided with a plurality of second frequency selective surfaces 150, and the second frequency selective surfaces 150 are used to transmit electromagnetic waves emitted from the first radiating unit 110 and the second radiating unit 120 to the third radiating unit 140.

The bandwidth of the broadband radiation of the antenna structure 10 can be further improved by the third radiating element 140 having a radiation frequency smaller than that of the first radiating element 110 being provided in the antenna structure 10, and the performance of the antenna structure 10 is improved by providing the plurality of second frequency selective surfaces 150 on the third radiating element 140 such that electromagnetic waves emitted from the first radiating element 110 and the second radiating element 120 to the third radiating element 140 are transmitted through the third radiating element 140, thereby avoiding that the third radiating element 140 shields electromagnetic waves emitted from the first radiating element 110, reducing the strength of the mutual coupling between the third radiating element 140 and the first radiating element 110.

In a specific implementation, the maximum dimension of the second frequency selective surface is γ which is one tenth or less, and γ is a wavelength corresponding to the center frequency of the resonance frequency of the first radiation unit 110. By setting the maximum size of the second frequency selective surface 150 to γ which is one tenth or less, the first frequency selective surface 130 can be made to be able to reduce the influence of the first frequency selective surface 130 on the electromagnetic wave radiated from the first radiation unit 110 while being able to ensure that the electromagnetic wave radiated from the second radiation unit 120 is able to be transmitted out from the first radiation unit 110, so that the operation stability of the first radiation unit 110 can be ensured.

It is understood that a plurality of third radiating elements 140 can be provided in the antenna structure 10, the plurality of third radiating elements 140 collectively forming at least one third radiating array. By providing at least one third radiating array formed by a plurality of third radiating elements 140 in the antenna structure 10, the radiation intensity of electromagnetic waves in the operating frequency band in which the third radiating elements 140 are located in the antenna structure 10 can be improved.

Referring to fig. 8, the third radiating element may include a third substrate 141, a third radiating arm 142, and a third feeding structure 143, the third radiating arm 142 being disposed on the third substrate 141, a plurality of second frequency selective surfaces 150 being disposed on a surface of the third radiating arm 142, the third feeding structure 143 being electrically connected with the third radiating arm 142. The third feeding structure 143 may be a feeding structure having a certain supporting capability so as to support the third radiating arm 142 and the third substrate 141.

By mounting the third radiating arm 142 on the third substrate 141, the mounting stability of the third radiating arm 142 can be improved, and the second frequency selective surface 150 is provided on the third radiating arm 142, electromagnetic waves emitted from the first radiating element 110 and the second radiating element 120 to the third radiating arm 142 can be transmitted through the second frequency selective surface 150, so that the influence of the third radiating arm 142 on the first radiating element 110 can be reduced, thereby improving the performance of the antenna structure 10.

With continued reference to fig. 8, the third radiating arm may include oppositely disposed third and fourth surfaces 1421, the third surface facing the first radiating element 110, at least one of the third and fourth surfaces 1421 having a plurality of second frequency selective surfaces 150 disposed thereon. In some embodiments, the second frequency selective surface 150 can be disposed on the third surface of the third radiating arm 142, the second frequency selective surface 150 can also be disposed on the fourth surface 1421 of the third radiating arm 142, and the second frequency selective surface 150 can also be disposed on both the third surface and the fourth surface 1421 of the third radiating arm 142.

By providing the plurality of second frequency selective surfaces 150 on at least one of the third surface facing the first radiating element 110 on the third radiating arm 142 and the fourth surface 1421 opposite to the third surface, the flexibility of the arrangement of the second frequency selective surfaces 150 on the third radiating arm 142 can be improved. By providing the plurality of second frequency selective surfaces 150 on the third surface facing the first radiation unit 110 on the third radiation arm 142 and on the fourth surface 1421 opposite to the third surface, the transmission ability of the second frequency selective surfaces 150 to transmit electromagnetic waves of the first radiation unit 110 and the second radiation unit 120 to the third radiation unit 140 can be improved as compared with when the plurality of second frequency selective surfaces 150 are provided on only one of the third surface and the fourth surface 1421.

With continued reference to fig. 8, in some embodiments, the third substrate 141 may include third and fourth oppositely disposed mounting surfaces 1411, the third mounting surface facing the first radiating element 110. The number of the third radiation arms 142 is one or plural, and if the number of the third radiation arms 142 is one, the third radiation arms 142 are provided on the third mounting surface or the fourth mounting surface 1411.

In one possible implementation, the number of third radiating arms 142 may be two, two third radiating arms 142 are electrically connected, and two third radiating arms 142 are arranged in the thickness direction of the third radiating arms 142. One of the third radiation arms 142 is provided on the third mounting surface, and the other one of the third radiation arms 142 is provided on the fourth mounting surface 1411, and the two third radiation arms 142 are indirectly contacted in the thickness direction of the third radiation arm 142 through the third substrate 141. In specific use, only one of the third radiating arms 142 needs to be fed, so that the electromagnetic waves on the two third radiating arms 142 can be radiated. By mounting one of the two third radiating arms 142 on the third mounting surface of the third substrate 141 and the other of the two third radiating arms 142 on the fourth mounting surface 1411 of the third substrate 141, the radiation capability of the third radiating element 140 can be improved, and the radiation performance of the antenna structure 10 on electromagnetic wave signals can be improved.

In another possible implementation manner, the number of the third radiating arms 142 may be three, and the number of the third substrates 141 is two, where one third radiating arm 142 is disposed on each of the third mounting surface and the fourth mounting surface 1411 of one third substrate 141, and one third radiating arm 142 is disposed on the third mounting surface or the fourth mounting surface 1411 of the other third substrate 141, so that the radiation capability of the third radiating element 140 to electromagnetic waves and the performance of the antenna structure 10 can be further improved. It is understood that the two third substrates 141 are connected by a connection structure, or the two third substrates 141 may be directly bonded in the thickness direction.

With continued reference to fig. 8, the third radiating arm 142 may include a plurality of third radiating branches 1422 and third connecting members 1423, each third radiating branch 1422 having one end connected to the third connecting member 1423, the third connecting member 1423 being electrically connected to the third feeding structure 143. Each third radiating stub 1422 may include a third radiating surface and a fourth radiating surface disposed opposite each other, the third radiating surface facing the first radiating element 110, at least one of the third and fourth radiating surfaces having a plurality of second frequency selective surfaces 150 disposed thereon. In some embodiments, the third radiating arm 142 may include four third radiating branches 1422, the four third radiating branches 1422 being symmetrically disposed with respect to each other, and a plurality of second frequency selective surfaces 150 being disposed on at least one of the third radiating surface and the fourth radiating surface of each third radiating branch 1422.

Referring to fig. 8, in some embodiments, the second radiating element 120 may include a second substrate 121, a second radiating arm 122, and a second feeding structure 123, the second radiating arm 122 being disposed on the second substrate 121, the second feeding structure 123 being electrically connected to the second radiating arm 122. The second feeding structure 123 may be a feeding structure having a certain supporting capability so as to support the second radiating arm 122 and the second substrate 121. By mounting the second radiation arm 122 on the second substrate 121, the mounting stability of the second radiation arm 122 can be improved.

Referring to fig. 8, the second substrate 121 is provided with a fifth mounting surface and a sixth mounting surface 1211 facing each other, and the sixth mounting surface 1211 faces the first radiation unit 110. The number of the second radiation arms 122 is one or more, and when the number of the second radiation arms 122 is one, the second radiation arms 122 are disposed on the fifth mounting surface or the sixth mounting surface 1211. By providing the second radiation arm 122 at the fifth mounting surface and the sixth mounting surface 1211 of the second substrate 121, the mounting flexibility of the second radiation arm 122 on the second substrate 121 can be improved, thereby improving the assembly flexibility of the antenna structure 10.

With continued reference to fig. 8, the second radiating arm 122 may include a plurality of second radiating branches 1221 and second connectors 1222, with one end of each second radiating branch 1221 connected to a second connector 1222, and the second connector 1222 electrically connected to the second feed structure 123. Each second radiating branch 1221 may include a fifth radiating surface and a sixth radiating surface disposed opposite each other, the sixth radiating surface facing the first radiating element 110. In some embodiments, the second radiation arm 122 may include four second radiation branches 1221, where the four second radiation branches 1221 are disposed symmetrically with respect to each other.

Referring to fig. 8, in one possible implementation, the antenna structure 10 may further include a reflector 160, with the front projection of the first radiation element 110 toward the reflector 160, the front projection of the second radiation element 120 toward the reflector 160, and the front projection of the third radiation element 140 toward the reflector 160 all falling within the reflector 160. By providing the reflector 160 and causing the front projection of the first radiation element 110 towards the reflector 160, the front projection of the second radiation element 120 towards the reflector 160, and the front projection of the third radiation element 140 towards the reflector 160 to fall within the reflector 160, electromagnetic waves emitted by the radiation elements in the antenna structure 10 can be radiated in the reflection direction set by the reflector 160. In a specific implementation, the reflector 160 may be a metal reflector plate.

Referring to fig. 9A to 9J, in one possible implementation, the pattern formed by the front projected surfaces of the first frequency selective surfaces 130 facing the first radiating elements 110 is a central symmetrical pattern, and the first frequency selective surfaces 130 of different patterns with the same maximum size can be provided on one first radiating element 110. For example, the largest dimensions of the first frequency selective surface 130 on the first and second surfaces 1121 of the first radiating arm 112 are the same, but the patterns formed by the surfaces of the first frequency selective surfaces 130 on the first and second surfaces 1121 that are forward projected towards the first radiating element 110 are different. Referring to fig. 9J, in some examples, the first frequency selective surface 130 may include a plurality of first branches 131, the plurality of first branches 131 being disposed around a center of the orthographic projection of the first frequency selective surface 130, the plurality of first branches 131 being symmetrical about the center.

It will be appreciated that the pattern formed by the surface of the second frequency selective surface 150 that is forward projected towards the third radiating element 140 may be the same as the pattern formed by the surface of the first frequency selective surface 130 that is forward projected towards the first radiating element 110, but that the maximum size of the second frequency selective surface 150 may be different from the size of the first frequency selective surface 130. A third radiating element 140 can be provided with a second frequency selective surface 150 of a different pattern having the same maximum dimension.

Referring to fig. 10, a second aspect of the embodiment of the present application provides a communication device 100, where the communication device 100 may include a plurality of feeding networks 101, and an antenna structure 10 as described above, a first radiating element 110 in the antenna structure 10 is electrically connected to one of the feeding networks 101, and a second radiating element 120 in the antenna structure 10 is electrically connected to the other feeding network 101. The embodiment of the application provides an antenna structure 10 and a communication device 100, wherein the communication device 100 connects a first radiating element 110 in the antenna structure 10 with one of a plurality of feeding networks 101, and connects a second radiating element 120 in the antenna structure 10 with the other feeding network 101, so that the first radiating element 110 and the second radiating element 120 can both receive and transmit electromagnetic waves through the feeding network 101 connected with the feeding network, and the service performance of the communication device 100 can be improved. In a specific implementation, the communication device 100 may further include an antenna connector 105, where one end of the feed network 101 is connected to the antenna structure 10, and the other end of the feed network 101 is electrically connected to the antenna connector 105.

Referring to fig. 10, the communication device 100 may further comprise a transmission component by which the feed network 101 is able to achieve the pointing of different radiation beams. The communication device 100 may further comprise a calibration network 103 and the calibration signal required by the communication device 100 can be obtained through a connection of the feed network 101 to the calibration network 103. The feed network 101 may also include phase shifting network 102, combiner, filter 104, etc. for extending the performance of the communication device 100.

With continued reference to fig. 10, in one possible implementation, the communication device 100 may further include an antenna structure housing 106, with the antenna structure 10 and the plurality of feed networks 101 each disposed within the antenna structure housing 106. By arranging the communication device 100 in the antenna structure cover 106, the communication device 100 arranged in the antenna structure cover 106 can be protected, the probability of damage to the communication device 100 due to impact is reduced, and the service life of the communication device 100 is prolonged.

Referring to fig. 11, the embodiment of the present application further provides a communication system, which includes the communication device 100, the support bar 200, the adjusting bracket 300, the joint seal 400, and the grounding device 500. The antenna structure housing 106 in the communication device 100 is connected to the support pole 200 by means of an adjusting bracket 300, the adjusting bracket 300 is used for adjusting the orientation of the antenna structure housing 106 relative to the support pole 200, the joint seal 400 is used for sealing the antenna joint 105 in the antenna structure housing 106, and the grounding device 500 is used for grounding the antenna joint 105.

In this specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

Generally, terms should be understood at least in part by use in the context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, at least in part depending on the context. Similarly, terms such as "a" or "an" may also be understood to convey a singular usage or a plural usage, depending at least in part on the context.

It should be readily understood that the terms "on … …", "above … …" and "above … …" in this disclosure should be interpreted in the broadest sense such that "on … …" means not only "directly on something", but also includes "on something" with intermediate features or layers therebetween, and "above … …" or "above … …" includes not only the meaning "on something" or "above" but also the meaning "above something" or "above" without intermediate features or layers therebetween (i.e., directly on something).

Further, spatially relative terms, such as "below," "beneath," "above," "over," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein interpreted accordingly.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (18)

1. An antenna structure comprising a first radiating element and a second radiating element;

The radiation frequency of the first radiation unit is lower than that of the second radiation unit, and the first radiation unit and the second radiation unit are arranged at intervals in the thickness direction of the second radiation unit;

the first radiating element is provided with a plurality of first frequency selective surfaces for transmitting electromagnetic waves emitted from the second radiating element to the first radiating element.

2. The antenna structure according to claim 1, wherein a maximum dimension of the first frequency selective surface is λ which is one tenth or less, the λ being a wavelength corresponding to a center frequency of a resonance frequency of the second radiation unit.

3. The antenna structure of claim 1, wherein the first radiating element comprises a first substrate, a first radiating arm, and a first feed structure;

the first radiation arm is arranged on the first substrate, and a plurality of first frequency selection surfaces are arranged on the surface of the first radiation arm;

the first feed structure is electrically connected with the first radiating arm.

4. The antenna structure of claim 3, wherein the first radiating arm includes oppositely disposed first and second surfaces, the first surface facing the second radiating element;

At least one of the first surface and the second surface has a plurality of the first frequency selective surfaces disposed thereon.

5. The antenna structure of claim 4, wherein the first substrate includes a first mounting surface and a second mounting surface disposed opposite each other, the first mounting surface facing the second radiating element;

the number of the first radiation arms is one or more;

when the number of the first radiation arms is one, the first radiation arms are arranged on the first mounting surface or the second mounting surface.

6. The antenna structure according to claim 5, wherein when the number of the first radiation arms is two, the two first radiation arms are electrically connected, and the two first radiation arms are arranged in a thickness direction of the first radiation arms;

one of the first radiation arms is arranged on the first mounting surface, and the other first radiation arm is arranged on the second mounting surface.

7. The antenna structure according to claim 5, wherein the number of the first radiating arms is three, and the number of the first substrates is two, wherein one of the first radiating arms is provided on the first mounting surface and the second mounting surface of one of the first substrates, and one of the first radiating arms is provided on the first mounting surface or the second mounting surface of the other of the first substrates.

8. The antenna structure of claim 3, wherein the first radiating arm includes a plurality of first radiating stubs and first connectors, one end of each of the first radiating stubs being connected to the first connectors, the first connectors being electrically connected to the first feed structure;

each first radiation branch comprises a first radiation surface and a second radiation surface which are oppositely arranged, and the first radiation surfaces face the second radiation unit;

at least one of the first radiation surface and the second radiation surface is provided with a plurality of the first frequency selective surfaces.

9. An antenna structure according to claim 3, wherein orthographic projections of a plurality of said first frequency selective surfaces toward said first radiating arm all fall within said first radiating arm.

10. The antenna structure according to claim 1, characterized in that the pattern formed by the surface of the orthographic projection of the first frequency selective surface towards the first radiating element is a centrosymmetric pattern;

the first frequency selective surface includes a plurality of first branches disposed about a center of an orthographic projection of the first frequency selective surface, the plurality of first branches being symmetrical about the center.

11. The antenna structure according to any one of claims 1 to 10, characterized in that the antenna structure further comprises a third radiating element;

the radiation frequency of the third radiation unit is smaller than that of the first radiation unit, and the third radiation unit and the first radiation unit are arranged at intervals in the thickness direction of the first radiation unit;

the third radiating element is provided with a plurality of second frequency selective surfaces for transmitting electromagnetic waves emitted to the third radiating element by the first radiating element and the second radiating element.

12. The antenna structure of claim 11, wherein a maximum dimension of the second frequency selective surface is γ which is one tenth or less of a wavelength corresponding to a center frequency of a resonance frequency of the first radiating element.

13. The antenna structure of claim 11, wherein the third radiating element comprises a third substrate, a third radiating arm, and a third feed structure;

the third radiation arm is arranged on the third substrate, and a plurality of second frequency selection surfaces are arranged on the surface of the third radiation arm;

The third feed structure is electrically connected with the third radiating arm.

14. The antenna structure of claim 13, wherein the third radiating arm includes oppositely disposed third and fourth surfaces, the third surface facing the first radiating element;

at least one of the third surface and the fourth surface is provided with a plurality of the second frequency selective surfaces.

15. The antenna structure of claim 11, wherein the antenna structure has a plurality of the first radiating elements, a plurality of the second radiating elements, and a plurality of the third radiating elements;

the plurality of first radiating elements together form at least one first radiating array, the plurality of second radiating elements together form at least one second radiating array, and the plurality of third radiating elements together form at least one third radiating array.

16. The antenna structure of claim 11, further comprising a reflector, wherein the orthographic projection of the first radiating element toward the reflector, the orthographic projection of the second radiating element toward the reflector, and the orthographic projection of the third radiating element toward the reflector all fall within the reflector.

17. A communication device comprising a plurality of feed networks, and an antenna structure according to any one of claims 1 to 16, a first radiating element in the antenna structure being electrically connected to one of the feed networks, a second radiating element in the antenna structure being electrically connected to the other feed network.

18. The communication device of claim 17, wherein the communication device comprises an antenna structure housing, the antenna structure and the plurality of feed networks each being disposed within the antenna structure housing.