Decoupling radiation unit and multi-frequency common-aperture antenna

Abstract

The present application relates to a decoupling radiation unit and a multi-frequency common-aperture antenna. The decoupling radiation unit comprises two pairs of radiation arms, which are orthogonally arranged in a polarization manner, wherein the two pairs of radiation arms are of a centrosymmetric structure with respect to the same central point; each radiation arm comprises a feed portion and a radiation ring; the radiation ring is connected to the feed portion to form a closed-loop structure; the radiation ring comprises at least two types of suppression structures; at least one suppression structure is provided in each type of suppression structure; the frequency bands that different types of suppression structures can suppress are different; and all suppression structures of the radiation ring are connected in sequence. A radiation ring of a decoupling radiation unit uses at least two types of suppression structures, and at least one suppression structure is provided in each type of suppression structure, thereby implementing ultra-wideband suppression for a high-frequency signal. Furthermore, the same decoupling radiation unit can be used for different multi-frequency common-aperture antennas, thereby improving the universality and the productivity of the antennas and reducing the costs of the antennas. In addition, it is easy to implement a more complex multi-frequency common-aperture antenna with a smaller size and a better performance.

Description

Decoupling radiating element and multi-frequency co-aperture antenna

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on August 21, 2023, with application number 202311056421.1 and invention name “Decoupling Radiating Unit and Multi-Frequency Co-Aperture Antenna”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of antenna technology, and in particular to a decoupling radiation unit and a multi-frequency co-aperture antenna. Background Art

[0004] To reduce base station site rental costs and facilitate the installation of multi-standard, multi-frequency, common-aperture antennas, operators typically require antennas to be as small and lightweight as possible. Consequently, there is an increasing demand for integrating antennas for multiple frequency bands on platforms with limited space. However, antennas for different frequency bands cannot be simply pieced together. When integrated on the same platform, antennas for different frequency bands will couple and scatter, affecting their radiation performance.

[0005] Among them, the array layout with high and low frequencies arranged in parallel is the mainstream solution for current multi-frequency electrically adjustable base station antennas. In order to reduce the cross-sectional size of the antenna and suppress the mutual coupling between high and low frequencies, the low-frequency radiating surface often adopts a decoupling structure to suppress high-frequency parasitic radiation, thereby achieving better antenna indicators and design dimensions.

[0006] The multi-frequency common-aperture antenna in the relevant technology needs to support the integration of multiple frequency bands including but not limited to 690MHz-960MHz, 1427MHz-2690MHz, 3300MHz-4200MHz, etc. This requires the decoupling suppression structure of the low-frequency radiating surface to have a wider suppression bandwidth to ensure the performance of each high-frequency antenna.

[0007] Summary of the Invention

[0008] Based on this, the present application provides a decoupling radiation unit and a multi-frequency co-aperture antenna, which can suppress ultra-wideband high-frequency signals.

[0009] A first aspect of the present application provides a decoupling radiation unit, the decoupling radiation unit comprising:

[0010] Two pairs of radiating arms are arranged with polarization orthogonal, each radiating arm includes a feeding part and a radiating ring, the radiating ring is connected to the feeding part to form a closed-loop structure, the radiating ring includes at least two suppression structures, each type of suppression structure is set to at least one, different types of suppression structures can suppress different frequency bands, and all the suppression structures of the radiating ring are connected in sequence.

[0011] In one embodiment, the at least two inhibition structures include at least two first inhibition structures and at least two second inhibition structures, and the first inhibition structures and the second inhibition structures are arranged alternately; or, the at least two inhibition structures include two first inhibition structures and one second inhibition structure, and the first inhibition structure and the second inhibition structure are arranged alternately; or, the at least two inhibition structures include one first inhibition structure and two second inhibition structures, and the first inhibition structure and the second inhibition structure are arranged alternately.

[0012] In one embodiment, each of the suppression structures includes a first suppression portion and a second suppression portion connected in series, and the first suppression portion and the second suppression portion are each U-shaped; or, each of the suppression structures includes a first suppression portion, a second suppression portion and a third suppression portion connected in series, and the first suppression portion, the second suppression portion and the third suppression portion are each U-shaped.

[0013] In one embodiment, for each of the suppression structures, the opening direction of the second suppression portion is respectively set at an angle to or opposite to the opening direction of the first suppression portion and the opening direction of the third suppression portion, and the opening direction of the first suppression portion is set opposite to, facing, or the same as the opening direction of the third suppression portion.

[0014] In one embodiment, the first inhibition portion, the second inhibition portion and the third inhibition portion each include two first line segments arranged relatively spaced apart and a second line segment connecting the two first line segments, and the second line segment is arranged at an angle to the first line segment; and the length of the first line segment of the second inhibition portion of one of the inhibition structures is greater than the length of the first line segment of the second inhibition portion of another of the inhibition structures.

[0015] In one embodiment, the opening of the second suppression portion faces away from the middle portion of the radiation ring, and the second suppression portion is concave toward the area enclosed by the radiation ring.

[0016] In one embodiment, one of the first line segments of the second inhibition portion overlaps with the second line segment of the adjacent first inhibition portion, and another of the first line segments of the second inhibition portion overlaps with the second line segment of the adjacent third inhibition portion.

[0017] In one embodiment, one of the first line segments of the second inhibition portion is connected to the second line segment of the adjacent first inhibition portion, and another of the first line segments of the second inhibition portion is connected to the second line segment of the adjacent third inhibition portion.

[0018] In one embodiment, one of the first line segments of the first inhibition portion and one of the first line segments of the third inhibition portion are connected in series to the radiation ring, and another first line segment of the first inhibition portion and another first line segment of the third inhibition portion are both provided with free ends.

[0019] In one embodiment, the decoupling radiation unit further includes a balun, and the balun is electrically connected to the feeding portion.

[0020] The second aspect of the present application provides a multi-frequency co-aperture antenna, which includes: a low-frequency array, a high-frequency array and a reflector, wherein the low-frequency array and the high-frequency array are arranged on the reflector, and the low-frequency array includes a plurality of low-frequency radiation units, and the low-frequency radiation unit adopts the decoupling radiation unit as described in the first aspect. The projection of the low-frequency array on the reflector is set to a first projection, and the projection of the high-frequency array on the reflector is set to a second projection, and the first projection and the second projection at least partially overlap.

[0021] In one embodiment, the low-frequency array is used to receive and / or send electromagnetic wave signals in the frequency band of 690MHz to 960MHz; the high-frequency array includes a first high-frequency array and a second high-frequency array, the first high-frequency array is used to receive and / or send electromagnetic wave signals in the frequency band of 1400MHz to 2700MHz, and the second high-frequency array is used to receive and / or send electromagnetic wave signals in the frequency band of 3300MHz to 4200MHz.

[0022] In one embodiment, the high-frequency array includes a first high-frequency array, the first high-frequency array includes a plurality of first high-frequency radiation units, the four radiation arms of each of the low-frequency radiation units correspond to the positions of the four first high-frequency radiation units respectively, and the projection of the radiation arm of the low-frequency radiation unit on the reflecting plate at least partially overlaps with the projection of the first high-frequency radiation unit with the corresponding position on the reflecting plate.

[0023] In one embodiment, the high-frequency array includes a first high-frequency array and a second high-frequency array, the first high-frequency array includes a plurality of first high-frequency radiation units, the second high-frequency array includes a plurality of second high-frequency radiation units, and the projections of the low-frequency radiation units on the reflecting plate coincide with the projections of at least one of the first high-frequency radiation units on the reflecting plate and the projections of at least one of the second high-frequency radiation units on the reflecting plate.

[0024] In one embodiment, each of the low-frequency radiation units corresponds to the position of four of the first high-frequency radiation units, and each of the low-frequency radiation units also corresponds to the position of four of the second high-frequency radiation units; each of the first high-frequency radiation units corresponds to the position of four of the second high-frequency radiation units.

[0025] The decoupling radiating unit and the multi-frequency co-aperture antenna described in the present application, on the one hand, the radiating ring of the decoupling radiating unit adopts at least two continuously arranged suppression structures, and each suppression structure is set to at least one, thereby achieving ultra-wideband suppression of high-frequency signals; on the other hand, the same decoupling radiating unit can be used for different multi-frequency co-aperture antennas, thereby improving the versatility and antenna manufacturability and reducing the antenna cost; in addition, it is easy to realize more complex multi-frequency co-aperture antennas with smaller size and better performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic structural diagram of a decoupling radiation unit according to an embodiment of the present application.

[0027] FIG2 is a schematic structural diagram of a radiation arm of the decoupling radiation unit in FIG1 .

[0028] FIG3 is a schematic structural diagram of a decoupling radiation unit according to another embodiment of the present application.

[0029] FIG4 is a schematic structural diagram of a radiation arm of the decoupling radiation unit in FIG3 .

[0030] FIG5 is a schematic structural diagram of a multi-frequency common aperture antenna according to an embodiment of the present application.

[0031] FIG6 is a schematic structural diagram of a multi-frequency common aperture antenna according to another embodiment of the present application.

[0032] FIG7 is a schematic structural diagram of a multi-frequency common aperture antenna according to another embodiment of the present application.

[0033] Description of reference numerals:

[0034] 10. Decoupling radiation unit; 11. Radiating arm; 111. Feeding part; 112. Radiating ring; 1121. Suppression structure; 11211. First suppression part; 11212. Second suppression part; 11213. Third suppression part; L1. First line segment; L2. Second line segment; 1122. First suppression structure; 1123. Second suppression structure; 20. Low-frequency array; 30. First high-frequency array; 31. First high-frequency radiation unit; 40. Second high-frequency array; 41. Second high-frequency radiation unit; 50. Reflection plate. DETAILED DESCRIPTION

[0035] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0036] Referring to Figures 1 and 2, Figure 1 shows a schematic structural diagram of a decoupling radiating unit 10 according to an embodiment of the present application. Figure 2 shows a schematic structural diagram of a radiating arm 11 of the decoupling radiating unit 10 in Figure 1. A decoupling radiating unit 10 provided in an embodiment of the present application includes two pairs of radiating arms 11 arranged with polarizations orthogonal. The two pairs of radiating arms 11 are centrally symmetrical about the same center point, and each radiating arm 11 includes a feeding portion 111 and a radiating ring 112. The radiating ring 112 is connected to the feeding portion 111 to form a closed-loop structure, and the radiating ring 112 includes at least two types of suppression structures 1121, and each type of suppression structure 1121 is provided with at least one. Different types of suppression structures 1121 can suppress different frequency bands, and all the suppression structures 1121 of the radiating ring 112 are connected in sequence. Specifically, all the suppression structures of the radiating ring are connected end to end in sequence.

[0037] It should be noted that adjusting the electrical length parameter of the suppression structure 1121 can achieve scattering suppression for signals of different bandwidths. The electrical length parameters of each type of suppression structure 1121 can be flexibly adjusted and set according to actual needs, so as to achieve scattering suppression for signals of a preset bandwidth. When the electrical length parameter of the suppression structure 1121 is larger, the scattering suppression effect on lower-frequency signals is more significant, while the scattering suppression effect on higher-frequency signals is weakened. Conversely, when the electrical length parameter of the suppression structure 1121 is smaller, the scattering suppression effect on higher-frequency signals is more significant, while the scattering suppression effect on lower-frequency signals is weakened.

[0038] Since the radiation ring 112 is connected to the feeding portion 111 to form a closed loop structure, that is, the radiation arm 11 is a closed loop structure.

[0039] Specifically, radiating arm 11 is closed-loop and hollow inside. When the decoupling radiating element 10 is co-arrayed with a high-frequency radiating element, the suppression structure 1121 of the decoupling radiating element 10 can suppress the high-frequency bandwidth. Furthermore, the hollow radiating arm 11 of the decoupling radiating element 10 facilitates the transmission of the high-frequency signal emitted by the high-frequency radiating element. Consequently, radiating arm 11 is less likely to participate in mutual coupling and scattering with the high-frequency radiating element, improving the radiation performance of the high-frequency antenna when co-arrayed.

[0040] The decoupling radiation unit 10 described in the present application, on the one hand, the radiation ring 112 of the decoupling radiation unit 10 adopts at least two continuously arranged suppression structures 1121, and each suppression structure 1121 is set to at least one, thereby achieving ultra-wideband suppression of high-frequency signals; on the other hand, the same decoupling radiation unit 10 can be used for different multi-frequency co-aperture antennas, thereby improving the versatility and antenna manufacturability and reducing the antenna cost; in addition, it is easy to realize more complex multi-frequency co-aperture antennas with smaller size and better performance.

[0041] In one embodiment, the at least two suppression structures 1121 include at least two first suppression structures 1122 and at least two second suppression structures 1123, with the first suppression structures 1122 and the second suppression structures 1123 being arranged alternately. Thus, a second suppression structure 1123 is provided between every two adjacent first suppression structures 1122, and a first suppression structure 1122 is provided between every two adjacent second suppression structures 1123. This can help improve the suppression bandwidth of the decoupling radiating unit 10 for high-frequency signals, thereby achieving ultra-wideband suppression of high-frequency signals.

[0042] In another embodiment, the at least two restraining structures 1121 include two first restraining structures 1122 and one second restraining structure 1123. The first restraining structures 1122 and the second restraining structures 1123 are alternately arranged.

[0043] In yet another embodiment, the at least two suppressing structures 1121 include one first suppressing structure 1122 and two second suppressing structures 1123. The first suppressing structure 1122 and the second suppressing structure 1123 are alternately arranged.

[0044] Referring to Figures 1 and 2 , in one embodiment, each suppression structure 1121 includes at least two suppression portions connected in series. As an example, the at least two suppression portions include a first suppression portion 11211 and a second suppression portion 11212 connected in series, each of which is U-shaped. As another example, the at least two suppression portions include not only the first suppression portion 11211 and the second suppression portion 11212, but also a third suppression portion 11213, each of which is U-shaped.

[0045] In this embodiment, at least two inhibition parts including a first inhibition part 11211, a second inhibition part 11212, and a third inhibition part 11213 connected in series are specifically used as an example for explanation, but this should not be understood as limiting the scope of protection of this application.

[0046] It should be noted that for different types of suppression structures 1121, at least one of the first suppression portion 11211, the second suppression portion 11212, and the third suppression portion 11213 may have different electrical length parameters, thereby enabling scattering suppression of different high-frequency signals. The electrical length parameters of the first suppression portion 11211, the second suppression portion 11212, and the third suppression portion 11213 of each type of suppression structure 1121 can be flexibly adjusted and configured according to actual needs, thereby enabling scattering suppression of predetermined high-frequency signals. Specifically, in this embodiment, when there are two types of suppression structures 1121, one type of suppression structure 1121, namely the first suppression structure 1122, for example, implements scattering suppression for one frequency bandwidth, namely, a first high frequency, which may be selected from 1400 MHz to 2700 MHz; the other type of suppression structure 1121, namely the second suppression structure 1123, for example, implements scattering suppression for another frequency bandwidth, namely, a second high frequency, which may be selected from 3300 MHz to 4200 MHz. An electrical length parameter of the second inhibition portion 11212 of one inhibition structure 1121 is different from an electrical length parameter of the second inhibition portion 11212 of another inhibition structure 1121, an electrical length parameter of the first inhibition portion 11211 of one inhibition structure 1121 is the same as an electrical length parameter of the first inhibition portion 11211 of another inhibition structure 1121, or the deviation is controlled within a first preset range, and an electrical length parameter of the third inhibition portion 11213 of one inhibition structure 1121 is the same as an electrical length parameter of the third inhibition portion 11213 of another inhibition structure 1121, or the deviation is controlled within a second preset range.

[0047] It should be noted that for different types of suppression structures 1121, there are many ways to arrange the opening directions of the first suppression portion 11211, the second suppression portion 11212 and the third suppression portion 11213, which can be flexibly adjusted and set according to actual needs, and it is impossible to list them all here.

[0048] Referring to FIG. 2 , in one embodiment, for each inhibitory structure 1121, the opening direction of the second inhibitory portion 11212 (indicated by arrow S2) is arranged at an angle with the opening direction of the first inhibitory portion 11211 (indicated by arrow S1) and the opening direction of the third inhibitory portion 11213 (indicated by arrow S3). The angle formed is, for example, 60° to 120°, specifically 60°, 75°, 90°, 105°, 120°, etc. Furthermore, the opening direction of the first inhibitory portion 11211 (indicated by arrow S1) is arranged opposite to the opening direction of the third inhibitory portion 11213 (indicated by arrow S3).

[0049] Referring to Figures 3 and 4, in another embodiment, for each inhibitory structure 1121, the opening direction of the second inhibitory portion 11212 (as indicated by arrow S2) is opposite to the opening direction of the first inhibitory portion 11211 (as indicated by arrow S1) and the opening direction of the third inhibitory portion 11213 (as indicated by arrow S3). The opening direction of the first inhibitory portion 11211 is the same as the opening direction of the third inhibitory portion 11213. Of course, in other embodiments, the arrangement of the first inhibitory portion 11211 and the third inhibitory portion 11213 can be adjusted so that the opening direction of the first inhibitory portion 11211 is opposite to or the same as the opening direction of the third inhibitory portion 11213.

[0050] Referring to FIG. 2 or FIG. 4 , in one embodiment, the first suppression portion 11211, the second suppression portion 11212, and the third suppression portion 11213 each include two first line segments L1 spaced apart from each other and a second line segment L2 connecting the two first line segments L1. The second line segment L2 is arranged at an angle to the first line segment L1. The length of the first line segment L1 of the second suppression portion 11212 of one type of suppression structure 1121 is greater than the length of the first line segment L1 of the second suppression portion 11212 of another type of suppression structure 1121. Thus, for different types of suppression structures 1121, the longer the first line segment L1 of the second suppression portion 11212, the more effective the scattering suppression effect is for lower-frequency high-frequency signals, while the scattering suppression effect for higher-frequency high-frequency signals is weakened.

[0051] 2 or 4 , specifically, the second line segment L2 is perpendicular to the first line segment L1 , and opposite ends of the second line segment L2 are connected to one end of the two first line segments L1 , respectively.

[0052] Referring to FIG. 2 or FIG. 4 , in one embodiment, the opening of the second suppressing portion 11212 is oriented (as indicated by arrow S2) away from the middle portion of the radiation ring 112. The second suppressing portion 11212 is concave toward the area enclosed by the radiation ring 112. Specifically, the first line segment L1 of the second suppressing portion 11212 extends toward the middle portion of the radiation ring 112, or extends toward the feeding portion 111. In this way, when the first line segment L1 of the second suppressing portion 11212 needs to increase in length to adapt to the scattering suppression of the preset frequency bandwidth of the high-frequency signal, the first line segment L1 can be extended toward the middle portion of the radiation ring 112, and the internal space size of the radiation ring 112 can be reasonably utilized, so that the aperture size of the radiation arm 11 can be reduced, and then the aperture size of the decoupling radiation unit 10 can be reduced.

[0053] Referring to FIG. 2 , in one embodiment, for the second suppression structure 1123, one first line segment L1 of the second suppression portion 11212 overlaps with the second line segment L2 of the adjacent first suppression portion 11211, and another first line segment L1 of the second suppression portion 11212 overlaps with the second line segment L2 of the adjacent third suppression portion 11213. Thus, one first line segment L1 of the second suppression portion 11212 shares a common line segment with the second line segment L2 of the adjacent first suppression portion 11211, and another first line segment L1 of the second suppression portion 11212 shares a common line segment with the second line segment L2 of the adjacent third suppression portion 11213. This results in a compact structural arrangement and a small aperture, while satisfying the requirements for scattering suppression within a predetermined frequency bandwidth for high-frequency signals.

[0054] The preset frequency band width is the first high frequency or the second high frequency. The first high frequency can be selected as 1400 MHz to 2700 MHz, and the second high frequency can be selected as 3300 MHz to 4200 MHz.

[0055] Referring to Figure 2, in one embodiment, for the first inhibition structure 1122, one of the first line segments L1 of the second inhibition portion 11212 is connected to the second line segment L2 of the adjacent first inhibition portion 11211, and another first line segment L1 of the second inhibition portion 11212 is connected to the second line segment L2 of the adjacent third inhibition portion 11213.

[0056] 2 , in one embodiment, one first line segment L1 of the second inhibition portion 11212 and the second line segment L2 of the adjacent first inhibition portion 11211 are on the same straight line, and another first line segment L1 of the second inhibition portion 11212 and the second line segment L2 of the adjacent third inhibition portion 11213 are on the same straight line.

[0057] In another embodiment, one of the first line segments L1 of the second inhibiting portion 11212 and the adjacent second line segment L2 of the first inhibiting portion 11211 are arranged at an acute angle, where the angle is set to b, and b is, for example, 5°, 15°, 30°, 45°, 60°, etc. Another first line segment L1 of the second inhibiting portion 11212 and the adjacent second line segment L2 of the third inhibiting portion 11213 are arranged at an acute angle, for example, 5°, 15°, 30°, 45°, 60°, etc.

[0058] 2 , in one embodiment, one of the first line segments L1 on the first suppression structure 1122 and one of the first line segments L1 on the third suppression portion 11213 are connected in series to the radiating ring 112. Furthermore, another first line segment L1 on the first suppression portion 1122 and another first line segment L1 on the third suppression portion 11213 both have free ends.

[0059] Referring to Figure 2, there are many ways to connect the first suppression structure 1122 in the radiation ring 112, for example, there are four specific ways, one of which is: the first line segment L1 on the first suppression part 11211 close to the center of the radiation ring 112 and the first line segment L1 on the third suppression part 11213 close to the center of the radiation ring 112 are both connected in series to the radiation ring 112, and the first line segment L1 on the first suppression part 11211 away from the center of the radiation ring 112 and the first line segment L1 on the third suppression part 11213 away from the center of the radiation ring 112 are both provided with free ends. Another embodiment is: the first line segment L1 on the first inhibiting portion 11211 that is away from the center of the radiation ring 112 and the first line segment L1 on the third inhibiting portion 11213 that is away from the center of the radiation ring 112 are both connected in series to the radiation ring 112, and the first line segment L1 on the first inhibiting portion 11211 that is close to the center of the radiation ring 112 and the first line segment L1 on the third inhibiting portion 11213 that is close to the center of the radiation ring 112 are both provided with free ends. Yet another embodiment is: the first line segment L1 on the first inhibiting portion 11211 that is close to the center of the radiation ring 112 and the first line segment L1 on the third inhibiting portion 11213 that is away from the center of the radiation ring 112 are both connected in series to the radiation ring 112, and the first line segment L1 on the first inhibiting portion 11211 that is away from the center of the radiation ring 112 and the first line segment L1 on the third inhibiting portion 11213 that is close to the center of the radiation ring 112 are both provided with free ends. Another type is: the first line segment L1 on the first inhibition portion 11211 away from the center of the radiation ring 112 and the first line segment L1 on the third inhibition portion 11213 close to the center of the radiation ring 112 are both connected in series to the radiation ring 112, and the first line segment L1 on the first inhibition portion 11211 close to the center of the radiation ring 112 and the first line segment L1 on the third inhibition portion 11213 away from the center of the radiation ring 112 are both provided with free ends.

[0060] Referring to FIG. 2 , in one embodiment, a first line segment L1 of a first inhibiting portion 11211 of one inhibiting structure 1121 is connected to a first line segment L1 of a third inhibiting portion 11213 of another adjacent inhibiting structure 1121, and the two are arranged at an angle, denoted by angle a. Here, a is, for example, 60° to 150°, specifically 60°, 90°, 110°, 130°, 150°, and the like.

[0061] Referring to FIG. 4 , in another embodiment, one of the first line segments L1 of the second suppression portion 11212 at least partially overlaps with the first line segment L1 of the adjacent first suppression portion 11211, and another of the first line segments L1 of the second suppression portion 11212 at least partially overlaps with the first line segment L1 of the adjacent third suppression portion 11213. In this way, one of the first line segments L1 of the second suppression portion 11212 shares a common first line segment L1 with the adjacent first suppression portion 11211, and another of the first line segments L1 of the second suppression portion 11212 shares a common first line segment L1 with the adjacent third suppression portion 11213. This results in a relatively compact structural arrangement and a small aperture, while satisfying the requirements for scattering suppression within a predetermined frequency bandwidth of high-frequency signals.

[0062] In one embodiment, the decoupling radiation unit 10 further includes a balun, which is electrically connected to the feeding portion 111 .

[0063] In one embodiment, the radiation ring 112 is polygonal, including but not limited to a quadrilateral, pentagon, hexagon, heptagon, octagon, etc., and can be flexibly adjusted and configured according to actual needs. In addition, the radiation ring 112 is symmetrical along the polarization axis.

[0064] Referring to Figures 5 to 7, Figures 5 to 7 show schematic structural diagrams of multi-frequency co-aperture antennas according to three different embodiments of the present application. In one embodiment, a multi-frequency co-aperture antenna comprises: a low-frequency array 20, a high-frequency array, and a reflector 50. The low-frequency array 20 and the high-frequency array can each be electrically connected to the reflector 50 or connected to the reflector 50 in an insulated manner. In addition, the low-frequency array 20 includes a plurality of low-frequency radiating units, and the low-frequency radiating units adopt the decoupling radiating units 10 of any of the above-mentioned embodiments. The projection of the low-frequency array 20 on the reflector 50 is set to a first projection, and the projection of the high-frequency array on the reflector 50 is set to a second projection, and the first projection and the second projection at least partially overlap.

[0065] The multi-frequency co-aperture antenna described in the present application, on the one hand, the radiation ring 112 of the decoupling radiation unit 10 adopts at least two continuously arranged suppression structures 1121, and each suppression structure 1121 is set to at least one, thereby achieving ultra-wideband suppression of high-frequency signals; on the other hand, the same decoupling radiation unit 10 can be used for different multi-frequency co-aperture antennas, thereby improving the versatility and antenna manufacturability and reducing the antenna cost; in addition, it is easy to realize a more complex multi-frequency co-aperture antenna with a smaller size and better performance.

[0066] In one embodiment, the low-frequency array 20 is used to receive and / or send electromagnetic wave signals in the frequency band of 690MHz to 960MHz; the high-frequency array includes a first high-frequency array 30 and a second high-frequency array 40, the first high-frequency array 30 is used to receive and / or send electromagnetic wave signals in the frequency band of 1400MHz to 2700MHz, and the second high-frequency array 40 is used to receive and / or send electromagnetic wave signals in the frequency band of 3300MHz to 4200MHz.

[0067] Referring to Figure 5 , in one embodiment, the high-frequency array includes a first high-frequency array 30, which includes multiple first high-frequency radiating elements 31. The four radiating arms 11 of each low-frequency radiating element correspond to the positions of the four first high-frequency radiating elements 31, respectively. The projections of the radiating arms 11 of the low-frequency radiating elements on the reflector 50 at least partially overlap with the projections of the corresponding first high-frequency radiating elements 31 on the reflector 50. This allows for a compact layout and a smaller overall product size.

[0068] It should be noted that the first high-frequency radiation unit 31 may be in an overlapping relationship with the projection of one or more low-frequency radiation units on the reflective plate 50. The specific number of low-frequency radiation units that overlap with the projection of a first high-frequency radiation unit 31 on the reflective plate 50 is not limited here and can be flexibly adjusted and set according to actual needs.

[0069] In addition, a first high-frequency radiation unit 31 may correspond to the position of one or two radiation arms 11 of a low-frequency radiation unit, and their projections on the reflector 50 may at least partially overlap. The specific arrangement can be flexibly adjusted and set according to actual needs and is not limited here.

[0070] Specifically, in one embodiment, the low frequency array 20 is configured as 2 rows and 4 columns, and the first high frequency array 30 is correspondingly configured as 4 rows and 8 columns. A row of first high frequency radiating elements 31 is disposed on opposite sides of each row of low frequency radiating elements.

[0071] 6 and 7 , in one embodiment, the high-frequency array includes a first high-frequency array 30 and a second high-frequency array 40. The first high-frequency array 30 includes a plurality of first high-frequency radiating elements 31, and the second high-frequency array 40 includes a plurality of second high-frequency radiating elements 41. The projections of the low-frequency radiating elements on the reflector 50 overlap with the projections of at least one first high-frequency radiating element 31 and at least one second high-frequency radiating element 41 on the reflector 50, respectively.

[0072] Referring to FIG. 6 , specifically, in one embodiment, the low-frequency array 20 is configured, for example, with two rows and four columns, the first high-frequency array 30 is configured, for example, with two rows and eight columns, and the second high-frequency array 40 is configured, for example, with four rows and eleven columns. The low-frequency array 20 is positioned between two rows of first high-frequency radiating elements 31 in the first high-frequency array 30, and the second high-frequency array 40 is positioned between two rows of low-frequency radiating elements in the low-frequency array 20. The projections of each row of low-frequency radiating elements in the low-frequency array 20 at least partially overlap with those of the adjacent row of first high-frequency radiating elements 31 on the reflector 50, and at least partially overlap with those of the adjacent row of second high-frequency radiating elements 41 on the reflector 50.

[0073] Referring to FIG. 7 , in one embodiment, the low-frequency array 20 is configured, for example, with one row and four columns; the first high-frequency array 30 is configured, for example, with two rows and eight columns; and the second high-frequency array 40 is configured, for example, with four rows and sixteen columns. A row of first high-frequency radiating elements 31 is provided on opposite sides of a row of low-frequency radiating elements. Each low-frequency radiating element corresponds to four first high-frequency radiating elements 31. Specifically, the projection of each low-frequency radiating element on the reflector 50 at least partially overlaps with the projections of the corresponding four first high-frequency radiating elements 31 on the reflector 50. Furthermore, each low-frequency radiating element corresponds to four second high-frequency radiating elements 41. In other words, the projection of each low-frequency radiating element on the reflector 50 at least partially overlaps with the projections of the corresponding four second high-frequency radiating elements 41 on the reflector 50. Specifically, each of the four radiation rings 112 of each low-frequency radiating element is provided with a second high-frequency radiating element 41. In other words, the projection of the radiation ring 112 on the reflector 50 completely covers the projection of the second high-frequency radiating element 41 on the reflector 50.

[0074] In addition, a row of second high-frequency radiating elements 41 is disposed on opposite sides of each row of first high-frequency radiating elements 31. Each first high-frequency radiating element 31 corresponds to four second high-frequency radiating elements 41. Specifically, the projection of each first high-frequency radiating element 31 on the reflector 50 at least partially overlaps with the projections of the corresponding four second high-frequency radiating elements 41 on the reflector 50.

[0075] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0076] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0077] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0078] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0079] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0080] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the description of this application.

[0081] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of this patent application shall be determined by the appended claims.

Claims

1. A decoupling radiation unit, characterized in that: The decoupling radiation unit comprises: Two pairs of radiating arms are arranged orthogonally in polarization, each radiating arm includes a feeding part and a radiating ring, the radiating ring is connected to the feeding part to form a closed-loop structure, the radiating ring includes at least two suppression structures, each of the suppression structures is set to at least one, different types of the suppression structures can suppress different frequency bands, and all the suppression structures of the radiating ring are connected in sequence.

2. The decoupling radiation unit according to claim 1, characterized in that: The at least two inhibition structures include at least two first inhibition structures and at least two second inhibition structures, and the first inhibition structures and the second inhibition structures are arranged alternately; or, the at least two inhibition structures include two first inhibition structures and one second inhibition structure, and the first inhibition structure and the second inhibition structure are arranged alternately; or, the at least two inhibition structures include one first inhibition structure and two second inhibition structures, and the first inhibition structure and the second inhibition structure are arranged alternately.

3. The decoupling radiation unit according to claim 1, characterized in that: Each of the suppression structures includes a first suppression portion and a second suppression portion connected in series in sequence, and the first suppression portion and the second suppression portion are each in a U shape; or each of the suppression structures includes a first suppression portion, a second suppression portion and a third suppression portion connected in series in sequence, and the first suppression portion, the second suppression portion and the third suppression portion are each in a U shape.

4. The decoupling radiation unit according to claim 3, characterized in that: For each of the suppression structures, the opening direction of the second suppression portion is respectively set at an angle or opposite to the opening direction of the first suppression portion and the opening direction of the third suppression portion, and the opening direction of the first suppression portion is set opposite to, facing, or the same as the opening direction of the third suppression portion.

5. The decoupling radiation unit according to claim 3, characterized in that: The first inhibition portion, the second inhibition portion and the third inhibition portion each include two first line segments relatively spaced apart and a second line segment connecting the two first line segments, wherein the second line segment is arranged at an angle to the first line segment; and the length of the first line segment of the second inhibition portion of one inhibition structure is greater than the length of the first line segment of the second inhibition portion of another inhibition structure.

6. The decoupling radiation unit according to claim 5, characterized in that: The opening of the second inhibiting portion faces away from the middle portion of the radiation ring, and the second inhibiting portion is concave toward the area enclosed by the radiation ring.

7. The decoupling radiation unit according to claim 5, characterized in that: One of the first line segments of the second inhibition portion overlaps with the second line segment of the adjacent first inhibition portion, and another of the first line segments of the second inhibition portion overlaps with the second line segment of the adjacent third inhibition portion.

8. The decoupling radiation unit according to claim 5, characterized in that: One of the first line segments of the second inhibition portion is connected to the second line segment of the adjacent first inhibition portion, and another of the first line segments of the second inhibition portion is connected to the second line segment of the adjacent third inhibition portion.

9. The decoupling radiation unit according to claim 5, characterized in that: One of the first line segments of the first inhibition portion and one of the first line segments of the third inhibition portion are connected in series to the radiation ring, and another of the first line segments of the first inhibition portion and another of the first line segments of the third inhibition portion are both provided with free ends.

10. The decoupling radiation unit according to any one of claims 1 to 9, characterized in that: The decoupling radiation unit further includes a balun, and the balun is electrically connected to the feeding part.

11. A multi-frequency common aperture antenna, characterized in that: The multi-frequency co-aperture antenna includes: a low-frequency array, a high-frequency array and a reflector, the low-frequency array and the high-frequency array are arranged on the reflector, the low-frequency array includes a plurality of low-frequency radiation units, the low-frequency radiation unit adopts the decoupling radiation unit according to any one of claims 1 to 10, the projection of the low-frequency array on the reflector is set to a first projection, the projection of the high-frequency array on the reflector is set to a second projection, and the first projection and the second projection at least partially overlap.

12. The multi-frequency common aperture antenna according to claim 11, characterized in that: The low-frequency array is used to receive and / or send electromagnetic wave signals in the frequency band of 690MHz to 960MHz; the high-frequency array includes a first high-frequency array and a second high-frequency array, the first high-frequency array is used to receive and / or send electromagnetic wave signals in the frequency band of 1400MHz to 2700MHz, and the second high-frequency array is used to receive and / or send electromagnetic wave signals in the frequency band of 3300MHz to 4200MHz.

13. The multi-frequency common aperture antenna according to claim 11, characterized in that: The high-frequency array includes a first high-frequency array, which includes multiple first high-frequency radiation units. The four radiation arms of each of the low-frequency radiation units correspond to the positions of four first high-frequency radiation units respectively, and the projection of the radiation arm of the low-frequency radiation unit on the reflection plate at least partially overlaps with the projection of the first high-frequency radiation unit with the corresponding position on the reflection plate.

14. The multi-frequency common aperture antenna according to claim 11, characterized in that: The high-frequency array includes a first high-frequency array and a second high-frequency array, the first high-frequency array includes multiple first high-frequency radiation units, the second high-frequency array includes multiple second high-frequency radiation units, and the projections of the low-frequency radiation units on the reflecting plate coincide with the projections of at least one of the first high-frequency radiation units on the reflecting plate and the projections of at least one of the second high-frequency radiation units on the reflecting plate.

15. The multi-frequency common aperture antenna according to claim 14, characterized in that: Each of the low-frequency radiation units corresponds to the position of four of the first high-frequency radiation units, and each of the low-frequency radiation units also corresponds to the position of four of the second high-frequency radiation units; each of the first high-frequency radiation units corresponds to the position of four of the second high-frequency radiation units.

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