Decoupling radiating elements from a multi-frequency shared aperture antenna

Abstract

The application relates to a decoupling radiation unit and a multi-frequency common-aperture antenna. The decoupling radiation unit comprises two pairs of radiation arms arranged in polarization quadrature. The two pairs of radiation arms are in a central symmetric structure about the same center point. Each radiation arm comprises a feeding part and a radiation ring. The radiation ring and the feeding part are connected to form a closed loop structure. The radiation ring comprises at least two kinds of suppression structures, each kind of suppression structure is provided at least one, and different kinds of suppression structures can suppress different frequency bands. All the suppression structures of the radiation ring are sequentially connected. On the one hand, the radiation ring of the decoupling radiation unit adopts at least two kinds of suppression structures, and each kind of suppression structure is provided at least one, so that the ultra-wide frequency suppression of high-frequency signals is realized. On the other hand, the same kind of decoupling radiation unit can be adopted for different multi-frequency common-aperture antennas, the universality and the antenna production are improved, and the antenna cost is reduced. In addition, a more complex multi-frequency common-aperture antenna can be easily realized, the size is smaller, and the performance is better.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to a decoupled radiating element and a multi-frequency common aperture antenna. Background Technology

[0002] To reduce base station site rental costs and facilitate the installation of multi-standard, multi-frequency antennas with the same aperture, operators typically require antennas to be as small and lightweight as possible. Therefore, the demand for integrating multiple frequency band antennas on a limited space platform is becoming increasingly strong. However, antennas of different frequency bands cannot be simply pieced together. When antennas of different frequency bands are integrated on the same platform, they will couple and scatter with each other, thus affecting the antenna's radiation performance.

[0003] Among them, the array layout with high and low frequencies arranged in parallel is the mainstream solution for multi-frequency electrically tunable base station antennas. In order to reduce the antenna cross-sectional size and suppress the mutual coupling between high and low frequencies, the low-frequency radiating surface often adopts a structure to decouple and suppress high-frequency parasitic radiation, thereby achieving better antenna performance and design size.

[0004] Multi-frequency common-aperture antennas in related technologies need to support integration of multiple frequency bands, including but not limited to 690MHz-960MHz, 1427MHz-2690MHz, and 3300MHz-4200MHz. 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. Summary of the Invention

[0005] Therefore, it is necessary to overcome the shortcomings of the existing technology and provide a decoupled radiation element and multi-frequency common aperture antenna that can suppress ultra-wideband high-frequency signals.

[0006] A decoupling radiation unit, the decoupling radiation unit comprising:

[0007] Two pairs of radiating arms are arranged orthogonally with polarization. Each radiating arm includes a feed section and a radiating ring. The radiating ring and the feed section are connected to form a closed-loop structure. The radiating ring includes at least two suppression structures, with at least one of each type of suppression structure. Different types of suppression structures can suppress different frequency bands. All the suppression structures of the radiating ring are connected in sequence.

[0008] In one embodiment, the at least two suppression structures include at least two first suppression structures and at least two second suppression structures, with the first suppression structures and the second suppression structures being alternately arranged; or, the at least two suppression structures include two first suppression structures and one second suppression structure, with the first suppression structures and the second suppression structures being alternately arranged; or, the at least two suppression structures include one first suppression structure and two second suppression structures, with the first suppression structures and the second suppression structures being alternately arranged.

[0009] In one embodiment, each of the suppression structures includes a first suppression portion and a second suppression portion connected in series, each of the first suppression portion and the second suppression portion being 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, each of the first suppression portion, the second suppression portion and the third suppression portion being U-shaped.

[0010] In one embodiment, for each of the suppression structures, the opening orientation of the second suppression portion is set at an angle or opposite to the opening orientation of the first suppression portion and the opening orientation of the third suppression portion, respectively, and the opening orientation of the first suppression portion is set opposite to, opposite to, or the same as the opening orientation of the third suppression portion.

[0011] In one embodiment, the first suppression part, the second suppression part, and the third suppression part each include two first line segments arranged at relative intervals 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; wherein the length of the first line segment of the second suppression part of one suppression structure is greater than the length of the first line segment of the second suppression part of the other suppression structure.

[0012] 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 recessed towards the area enclosed by the radiation ring.

[0013] In one embodiment, one of the first line segments of the second suppression portion overlaps with the second line segment of its adjacent first suppression portion, and the other first line segment of the second suppression portion overlaps with the second line segment of its adjacent third suppression portion.

[0014] In one embodiment, one of the first line segments of the second suppression portion is connected to the second line segment of its adjacent first suppression portion, and the other first line segment of the second suppression portion is connected to the second line segment of its adjacent third suppression portion.

[0015] In one embodiment, one of the first segments on the first suppression part and one of the first segments on the third suppression part are connected in series to the radiation ring, and the other first segment on the first suppression part and the other first segment on the third suppression part are both provided with free ends.

[0016] In one embodiment, the decoupling radiation unit further includes a balun electrically connected to the feed section.

[0017] A multi-frequency common-aperture antenna includes: a low-frequency array, a high-frequency array, and a reflector. The low-frequency array and the high-frequency array are disposed on the reflector. The low-frequency array includes a plurality of low-frequency radiating elements. The low-frequency radiating elements are decoupled radiating elements as described in any one of claims 1 to 10. The projection of the low-frequency array on the reflector is designated as a first projection, and the projection of the high-frequency array on the reflector is designated as a second projection. The first projection and the second projection at least partially overlap.

[0018] In one embodiment, the low-frequency array is used to receive and / or transmit electromagnetic wave signals in the 690MHz to 960MHz frequency band; the high-frequency array includes a first high-frequency array and a second high-frequency array, the first high-frequency array being used to receive and / or transmit electromagnetic wave signals in the 1400MHz to 2700MHz frequency band, and the second high-frequency array being used to receive and / or transmit electromagnetic wave signals in the 3300MHz to 4200MHz frequency band.

[0019] In one embodiment, the high-frequency array includes a first high-frequency array, which includes a plurality of first high-frequency radiating elements. The four radiating arms of each low-frequency radiating element correspond to the positions of the four first high-frequency radiating elements. The projection of the radiating arm of the low-frequency radiating element on the reflector plate at least partially overlaps with the projection of the corresponding first high-frequency radiating element on the reflector plate.

[0020] 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, and the second high-frequency array includes a plurality of second high-frequency radiation units. The projections of the low-frequency radiation units on the reflector plate coincide with the projections of at least one first high-frequency radiation unit and at least one second high-frequency radiation unit on the reflector plate, respectively.

[0021] In one embodiment, each of the low-frequency radiation units corresponds to the position of four first high-frequency radiation units, and each of the low-frequency radiation units also corresponds to the position of four second high-frequency radiation units; each of the first high-frequency radiation units corresponds to the position of four second high-frequency radiation units.

[0022] The aforementioned decoupling radiating element and multi-frequency common-aperture antenna, on the one hand, employ at least two consecutively arranged suppression structures in the radiating loop of the decoupling radiating element, with at least one of each suppression structure, achieving ultra-wideband suppression of high-frequency signals; on the other hand, the same decoupling radiating element can be used for different multi-frequency common-aperture antennas, improving versatility and antenna manufacturability, and reducing antenna costs; in addition, it is easy to implement more complex multi-frequency common-aperture antennas, with smaller size and better performance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a decoupling radiation unit according to an embodiment of this application.

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of the radiation arm of the decoupled radiation unit in the diagram.

[0025] Figure 3 This is a schematic diagram of the structure of a decoupling radiation unit according to another embodiment of this application.

[0026] Figure 4 for Figure 3 A schematic diagram of the structure of the radiation arm of the decoupled radiation unit in the diagram.

[0027] Figure 5 This is a schematic diagram of the structure of a multi-frequency common aperture antenna according to an embodiment of this application.

[0028] Figure 6 This is a schematic diagram of the structure of a multi-frequency common aperture antenna according to another embodiment of this application.

[0029] Figure 7 This is a schematic diagram of the structure of a multi-frequency common aperture antenna according to another embodiment of this application.

[0030] 10. Decoupling radiation unit; 11. Radiation arm; 111. Feeding section; 112. Radiation ring; 1121. Suppression structure; 11211. First suppression section; 11212. Second suppression section; 11213. Third suppression section; 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. Reflector. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] See Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a decoupling radiation unit 10 according to an embodiment of this application is shown. Figure 2 It shows Figure 1 A schematic diagram of the structure of the radiating arm 11 of the decoupling radiating unit 10 in this application is shown. One embodiment of this application provides a decoupling radiating unit 10, which includes two pairs of radiating arms 11 arranged orthogonally with polarization. The two pairs of radiating arms 11 are centrally symmetrical about the same center point. Each radiating arm 11 includes a feed section 111 and a radiating ring 112. The radiating ring 112 is connected to the feed section 111 to form a closed-loop structure. The radiating ring 112 includes at least two types of suppression structures 1121, with at least one of each type. Different types of suppression structures 1121 can suppress different frequency bands. All suppression structures 1121 of the radiating ring 112 are connected sequentially. Specifically, all suppression structures of the radiating ring are connected end-to-end sequentially.

[0033] 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 parameter of each type of suppression structure 1121 can be flexibly adjusted and set according to actual needs, enabling scattering suppression of signals with 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 obvious, while the scattering suppression effect on higher frequency signals is weaker; conversely, when the electrical length parameter of the suppression structure 1121 is smaller, the scattering suppression effect on higher frequency signals is more obvious, while the scattering suppression effect on lower frequency signals is weaker.

[0034] Since the radiation ring 112 is connected to the power supply section 111 to form a closed-loop structure, that is to say, the radiation arm 11 has a closed-loop structure.

[0035] Specifically, the radiating arm 11 is closed-loop and hollow inside. When the decoupling radiating element 10 is co-arrayed with the high-frequency radiating element, on the one hand, the suppression structure 1121 of the decoupling radiating element 10 can suppress the high-frequency bandwidth; on the other hand, the hollow radiating arm 11 of the decoupling radiating element 10 facilitates the transmission of high-frequency signals emitted by the high-frequency radiating element. Therefore, the radiating arm 11 participates less in the mutual coupling and scattering of the high-frequency radiating element, improving the radiation performance of the high-frequency antenna when co-arrayed.

[0036] The aforementioned decoupling radiation element 10, on the one hand, employs at least two consecutively arranged suppression structures 1121 in its radiation ring 112, with each suppression structure 1121 being at least one, thereby achieving ultra-wideband suppression of high-frequency signals; on the other hand, the same decoupling radiation element 10 can be used for different multi-frequency common-aperture antennas, improving versatility and antenna manufacturability, and reducing antenna costs; furthermore, it is easy to implement more complex multi-frequency common-aperture antennas, with smaller size and better performance.

[0037] 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 alternately arranged. 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, thereby improving the suppression bandwidth of the decoupling radiation unit 10 for high-frequency signals, thereby achieving ultra-wideband suppression of high-frequency signals.

[0038] In another embodiment, at least two suppression structures 1121 include two first suppression structures 1122 and one second suppression structure 1123. The first suppression structures 1122 and the second suppression structure 1123 are alternately arranged.

[0039] In yet another embodiment, at least two types of suppression structures 1121 include a first suppression structure 1122 and two second suppression structures 1123. The first suppression structure 1122 and the second suppression structures 1123 are alternately arranged.

[0040] Please see Figure 1 and Figure 2In 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, which is U-shaped.

[0041] In this embodiment, we will specifically take at least two suppression parts, including a first suppression part 11211, a second suppression part 11212, and a third suppression part 11213 connected in series, as an example, but this should not be construed as a limitation on the scope of protection of this application.

[0042] It should be noted that for different types of suppression structures 1121, at least one of the first suppression part 11211, the second suppression part 11212, and the third suppression part 11213 has different electrical length parameters, enabling scattering suppression of different high-frequency signals. The electrical length parameters of the first suppression part 11211, the second suppression part 11212, and the third suppression part 11213 of each type of suppression structure 1121 can be flexibly adjusted and set according to actual needs, so as to achieve scattering suppression of preset high-frequency signals. Specifically, in this embodiment, when two types of suppression structures 1121 are provided, one type of suppression structure 1121, namely the first suppression structure 1122, for example, performs scattering suppression for one frequency bandwidth, namely the first high frequency, which can be selected as 1400MHz to 2700MHz; the other type of suppression structure 1121, namely the second suppression structure 1123, for example, performs scattering suppression for another frequency bandwidth, namely the second high frequency, which can be selected as 3300MHz to 4200MHz. The electrical length parameter of the second suppression portion 11212 of one type of suppression structure 1121 is different from that of the second suppression portion 11212 of another type of suppression structure 1121. The electrical length parameter of the first suppression portion 11211 of one type of suppression structure 1121 is the same as or deviates from that of the first suppression portion 11211 of another type of suppression structure 1121 by a first preset range. The electrical length parameter of the third suppression portion 11213 of one type of suppression structure 1121 is the same as or deviates from that of the third suppression portion 11213 of another type of suppression structure 1121 by a second preset range.

[0043] It should be noted that for different types of suppression structures 1121, there are many ways to arrange the openings of the first suppression part 11211, the second suppression part 11212 and the third suppression part 11213. These can be flexibly adjusted and set according to actual needs, and cannot be listed one by one here.

[0044] Please see Figure 2 In one embodiment, for each suppression structure 1121, the opening orientation of the second suppression portion 11212 (as shown by arrow S2) is set at an angle to the opening orientation of the first suppression portion 11211 (as shown by arrow S1) and the opening orientation of the third suppression portion 11213 (as shown by arrow S3), respectively. The angle formed is, for example, set to 60° to 120°, specifically, 60°, 75°, 90°, 105°, 120°, etc. Furthermore, the opening orientation of the first suppression portion 11211 (as shown by arrow S1) and the opening orientation of the third suppression portion 11213 (as shown by arrow S3) are set opposite to each other.

[0045] Please see Figure 3 and Figure 4 In another embodiment, for each suppression structure 1121, the opening orientation of the second suppression portion 11212 (as shown by arrow S2) is opposite to the opening orientation of the first suppression portion 11211 (as shown by arrow S1) and the opening orientation of the third suppression portion 11213 (as shown by arrow S3), respectively. The opening orientation of the first suppression portion 11211 is the same as the opening orientation of the third suppression portion 11213. Of course, in some other embodiments, the arrangement positions of the first suppression portion 11211 and the third suppression portion 11213 can be adjusted so that the opening orientation of the first suppression portion 11211 is facing each other or the same as the opening orientation of the third suppression portion 11213.

[0046] Please see Figure 2 or Figure 4 In one embodiment, the first suppression part 11211, the second suppression part 11212, and the third suppression part 11213 each include two first line segments L1 arranged at relative intervals 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 part 1121 of one type of suppression structure 1121 is greater than the length of the first line segment L1 of the second suppression part 11212 of the other type of suppression structure 1121. Thus, for different types of suppression structures 1121, when the length of the first line segment L1 of the second suppression part 11212 is larger, it has a scattering suppression effect on lower frequency high-frequency signals, while the scattering suppression effect on higher frequency high-frequency signals is weakened.

[0047] Please see Figure 2 or Figure 4 Specifically, the second line segment L2 is perpendicular to the first line segment L1. Furthermore, the two opposite ends of the second line segment L2 are each connected to one end of one of the two first line segments L1.

[0048] Please see Figure 2 or Figure 4 In one embodiment, the opening of the second suppression portion 11212 faces away from the middle portion of the radiation ring 112 (as shown by arrow S2). The second suppression portion 11212 is recessed towards the area enclosed by the radiation ring 112. Specifically, the first segment L1 of the second suppression portion 11212 extends towards the middle portion of the radiation ring 112 or towards the feed portion 111. Thus, when the length of the first segment L1 of the second suppression portion 11212 needs to be increased to adapt to the scattering suppression of the preset bandwidth of the high-frequency signal, the first segment L1 can be extended towards the middle portion of the radiation ring 112, making reasonable use of the internal space size of the radiation ring 112, thereby reducing the aperture size of the radiation arm 11 and thus reducing the aperture size of the decoupling radiation unit 10.

[0049] Please see Figure 2 In one embodiment, for the second suppression structure 1123, one of the first line segments L1 of the second suppression part 11212 overlaps with the second line segment L2 of its adjacent first suppression part 11211, and the other first line segment L1 of the second suppression part 11212 overlaps with the second line segment L2 of its adjacent third suppression part 11213. Thus, one of the first line segments L1 of the second suppression part 11212 shares the same line segment with the second line segment L2 of its adjacent first suppression part 11211, and the other first line segment L1 of the second suppression part 11212 shares the same line segment with the second line segment L2 of its adjacent third suppression part 11213. This results in a compact structure with a small aperture, while still satisfying the requirement for scattering suppression within a preset bandwidth for high-frequency signals.

[0050] The preset frequency bandwidth is either the first high frequency or the second high frequency. The first high frequency can be selected from 1400MHz to 2700MHz, and the second high frequency can be selected from 3300MHz to 4200MHz.

[0051] Please see Figure 2 In one embodiment, for the first suppression structure 1122, one of the first line segments L1 of the second suppression part 11212 is connected to the second line segment L2 of the adjacent first suppression part 11211, and the other first line segment L1 of the second suppression part 11212 is connected to the second line segment L2 of the adjacent third suppression part 11213.

[0052] Please see Figure 2 In one embodiment, one of the first line segments L1 of the second suppression part 11212 is on the same straight line as the second line segment L2 of the adjacent first suppression part 11211, and the other first line segment L1 of the second suppression part 11212 is on the same straight line as the second line segment L2 of the adjacent third suppression part 11213.

[0053] In another embodiment, one of the first line segments L1 of the second suppression portion 11212 and the second line segment L2 of the adjacent first suppression portion 11211 are arranged at an acute angle, the included angle being b, such as 5°, 15°, 30°, 45°, 60°, etc. The other first line segment L1 of the second suppression portion 11212 and the second line segment L2 of the adjacent third suppression portion 11213 are also arranged at an acute angle, such as 5°, 15°, 30°, 45°, 60°, etc.

[0054] Please see Figure 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 part 11213 are connected in series to the radiation ring 112. In addition, the other first line segment L1 on the first suppression part 1122 and the other first line segment L1 on the third suppression part 11213 are both provided with free ends.

[0055] Please see Figure 2 There are many ways to connect the first suppression structure 1122 in the radiation ring 112. Specifically, there are four ways. One of them is that the first line segment L1 on the first suppression part 11211 near the center of the radiation ring 112 and the first line segment L1 on the third suppression part 11213 near the center of the radiation ring 112 are connected in series to the radiation ring 112. 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 configuration involves the first line segment L1 on the first suppression part 11211 that is away from the center of the radiation ring 112, and the first line segment L1 on the third suppression part 11213 that is away from the center of the radiation ring 112, both connected in series to the radiation ring 112. The first line segment L1 on the first suppression part 11211 and the first line segment L1 on the third suppression part 11213 that is close to the center of the radiation ring 112 are both provided with free ends. Yet another configuration involves the first line segment L1 on the first suppression part 11211 and the first line segment L1 on the third suppression part 11213 that is away from the center of the radiation ring 112, both connected in series to the radiation ring 112. The first line segment L1 on the first suppression part 11211 and the first line segment L1 on the third suppression part 11213 that is close to the center of the radiation ring 112 are both provided with free ends. Another configuration is as follows: the first line segment L1 on the first suppression part 11211 that is far from the center of the radiation ring 112 and the first line segment L1 on the third suppression part 11213 that is close to the center of the radiation ring 112 are connected in series to the radiation ring 112. The first line segment L1 on the first suppression part 11211 that is close to the center of the radiation ring 112 and the first line segment L1 on the third suppression part 11213 that is far from the center of the radiation ring 112 are both provided with free ends.

[0056] Please see Figure 2 In one embodiment, the first line segment L1 of the first suppression portion 11211 of one suppression structure 1121 is connected to the first line segment L1 of the third suppression portion 11213 of the adjacent suppression structure 1121, and the two are arranged at an angle, which is denoted as α. α is, for example, set to 60° to 150°, specifically 60°, 90°, 110°, 130°, 150°, etc.

[0057] Please see Figure 4 In another embodiment, one of the first line segments L1 of the second suppression part 11212 at least partially overlaps with the first line segment L1 of its adjacent first suppression part 11211, and the other first line segment L1 of the second suppression part 11212 at least partially overlaps with the first line segment L1 of its adjacent third suppression part 11213. Thus, one of the first line segments L1 of the second suppression part 11212 is shared with the first line segment L1 of its adjacent first suppression part 11211, and the other first line segment L1 of the second suppression part 11212 is shared with the first line segment L1 of its adjacent third suppression part 11213. This results in a more compact structure, a smaller aperture, and the ability to suppress scattering within a preset bandwidth for high-frequency signals.

[0058] In one embodiment, the decoupling radiation unit 10 further includes a balun. The balun is electrically connected to the feed unit 111.

[0059] In one embodiment, the radiation ring 112 is polygonal, including but not limited to quadrilaterals, pentagons, hexagons, heptagons, octagons, etc., which can be flexibly adjusted and set according to actual needs. In addition, the radiation ring 112 has a symmetrical structure along the polarization axis.

[0060] Please see Figures 5 to 7 , Figures 5 to 7 The diagram illustrates the structure of a multi-frequency common-aperture antenna according to three different embodiments of this application. In one embodiment, the multi-frequency common-aperture antenna includes a low-frequency array 20, a high-frequency array, and a reflector 50. The low-frequency array 20 and the high-frequency array are connected to the reflector 50 either electrically or insulatedly. Furthermore, the low-frequency array 20 includes multiple low-frequency radiating elements, which employ the decoupling radiating element 10 of any of the above embodiments. The projection of the low-frequency array 20 onto the reflector 50 is designated as a first projection, and the projection of the high-frequency array onto the reflector 50 is designated as a second projection. The first projection and the second projection at least partially overlap.

[0061] The aforementioned multi-frequency common-aperture antenna, on the one hand, employs at least two consecutively arranged suppression structures 1121 in the radiation ring 112 of the decoupling radiation element 10, with each suppression structure 1121 being at least one, thereby achieving ultra-wideband suppression of high-frequency signals; on the other hand, the same decoupling radiation element 10 can be used for different multi-frequency common-aperture antennas, improving versatility and antenna manufacturability, and reducing antenna costs; in addition, it is easy to implement more complex multi-frequency common-aperture antennas, with smaller size and better performance.

[0062] In one embodiment, the low-frequency array 20 is used to receive and / or transmit electromagnetic wave signals in the 690MHz to 960MHz frequency band; the high-frequency array includes a first high-frequency array 30 and a second high-frequency array 40, the first high-frequency array 30 being used to receive and / or transmit electromagnetic wave signals in the 1400MHz to 2700MHz frequency band, and the second high-frequency array 40 being used to receive and / or transmit electromagnetic wave signals in the 3300MHz to 4200MHz frequency band.

[0063] Please see Figure 5 In one embodiment, the high-frequency array includes a first high-frequency array 30, which includes a plurality of 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. The projection of the radiating arm 11 of the low-frequency radiating element onto the reflector 50 at least partially overlaps with the projection of the corresponding first high-frequency radiating element 31 onto the reflector 50. This achieves a compact layout and a smaller overall aperture size for the product.

[0064] It should be noted that the first high-frequency radiation unit 31 may overlap with the projection of one or more low-frequency radiation units on the reflector 50. The specific number of low-frequency radiation units that overlap with the projection of a first high-frequency radiation unit 31 on the reflector 50 is not limited here and can be flexibly adjusted and set according to actual needs.

[0065] Furthermore, a first high-frequency radiating element 31 may correspond to the position of one or both radiating arms 11 of a low-frequency radiating element, 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.

[0066] In one specific 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 arranged on each side of the opposite side of each row of low-frequency radiating elements.

[0067] Please see Figure 6 and Figure 7In 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 coincide 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.

[0068] Please see Figure 6 In one specific embodiment, the low-frequency array 20 is configured as 2 rows and 4 columns, the first high-frequency array 30 is configured as 2 rows and 8 columns, and the second high-frequency array 40 is configured as 4 rows and 11 columns. The low-frequency array 20 is located between two rows of first high-frequency radiating elements 31 of the first high-frequency array 30, and the second high-frequency array 40 is located between two rows of low-frequency radiating elements of the low-frequency array 20. Each row of low-frequency radiating elements of the low-frequency array 20 at least partially overlaps with the projection of its adjacent row of first high-frequency radiating elements 31 onto the reflector 50, and at least partially overlaps with the projection of its adjacent row of second high-frequency radiating elements 41 onto the reflector 50.

[0069] Please see Figure 7 In one specific embodiment, the low-frequency array 20 is configured as 1 row and 4 columns, the first high-frequency array 30 is configured as 2 rows and 8 columns, and the second high-frequency array 40 is configured as 4 rows and 16 columns. A row of first high-frequency radiating units 31 is arranged on each side of a row of low-frequency radiating units. Each low-frequency radiating unit corresponds to four first high-frequency radiating units 31. Specifically, the projection of each low-frequency radiating unit on the reflector 50 at least partially overlaps with the projections of the corresponding four first high-frequency radiating units 31 on the reflector 50. Furthermore, each low-frequency radiating unit corresponds to four second high-frequency radiating units 41. In other words, the projection of each low-frequency radiating unit on the reflector 50 at least partially overlaps with the projections of the corresponding four second high-frequency radiating units 41 on the reflector 50. Specifically, each of the four radiation rings 112 of each low-frequency radiating unit contains one second high-frequency radiating unit 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 unit 41 on the reflector 50.

[0070] In addition, a row of second high-frequency radiation units 41 is arranged on each side of the first high-frequency radiation unit 31. Each first high-frequency radiation unit 31 corresponds to the four second high-frequency radiation units 41. Specifically, the projection of each first high-frequency radiation unit 31 on the reflector 50 and the projection of the corresponding four second high-frequency radiation units 41 on the reflector 50 are at least partially overlapped with each other.

[0071] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0072] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0073] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0074] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0075] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, 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 possible implementation.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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 this specification.

[0077] The embodiments described above are merely illustrative of several implementation methods of this application, and 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 those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A decoupled radiation unit, characterized in that, The decoupling radiation unit includes: Two pairs of radiating arms are arranged orthogonally with polarization. Each radiating arm includes a feed section and a radiating ring. The radiating ring and the feed section are connected to form a closed-loop structure. The radiating ring includes at least two suppression structures. Each type of suppression structure is at least one. Different types of suppression structures can suppress different frequency bands. All the suppression structures of the radiating ring are connected in sequence. Each of the suppression structures includes a first suppression part, a second suppression part, and a third suppression part connected in series. Each of the first, second, and third suppression parts is U-shaped. The opening of the second suppression part faces away from the middle portion of the radiation ring, and the second suppression part is concave towards the area enclosed by the radiation ring. Each of the first, second, and third suppression parts includes two first line segments spaced apart from each other and a second line segment connecting the two first line segments. The second line segment is angled to the first line segment. The length of the first line segment of the second suppression part of one type of suppression structure is greater than the length of the first line segment of the second suppression part of the other type of suppression structure. For each suppression structure, the opening orientation of the second suppression part is angled to the opening orientation of the first suppression part and the opening orientation of the third suppression part, respectively. The opening orientations of the first and third suppression parts are opposite to each other.

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

3. The decoupling radiation unit according to claim 1, characterized in that, One of the first line segments of the second suppression part coincides with the second line segment of the adjacent first suppression part, and the other first line segment of the second suppression part coincides with the second line segment of the adjacent third suppression part.

4. The decoupling radiation unit according to claim 1, characterized in that, One of the first line segments of the second suppression part is connected to the second line segment of the adjacent first suppression part, and the other first line segment of the second suppression part is connected to the second line segment of the adjacent third suppression part.

5. The decoupling radiation unit according to claim 1, characterized in that, One of the first line segments on the first suppression part and one of the first line segments on the third suppression part are connected in series to the radiation ring, and the other first line segment on the first suppression part and the other first line segment on the third suppression part are both provided with free ends.

6. The decoupling radiation unit according to any one of claims 1 to 5, characterized in that, The decoupling radiation unit also includes a balun, which is electrically connected to the feed section.

7. A multi-frequency common-aperture antenna, characterized in that, The multi-frequency common-aperture antenna includes: a low-frequency array, a high-frequency array, and a reflector. The low-frequency array and the high-frequency array are disposed on the reflector. The low-frequency array includes a plurality of low-frequency radiating elements. The low-frequency radiating elements are decoupled radiating elements as described in any one of claims 1 to 6. The projection of the low-frequency array on the reflector is designated as a first projection, and the projection of the high-frequency array on the reflector is designated as a second projection. The first projection and the second projection at least partially overlap.

8. The multi-frequency common-aperture antenna according to claim 7, characterized in that, The low-frequency array is used to receive and / or transmit electromagnetic wave signals in the 690MHz to 960MHz frequency band; 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 transmit electromagnetic wave signals in the 1400MHz to 2700MHz frequency band, and the second high-frequency array is used to receive and / or transmit electromagnetic wave signals in the 3300MHz to 4200MHz frequency band.

9. The multi-frequency common-aperture antenna according to claim 7, characterized in that, The high-frequency array includes a first high-frequency array, which includes a plurality of first high-frequency radiation units. The four radiation arms of each low-frequency radiation unit correspond to the positions of the four first high-frequency radiation units. The projection of the radiation arm of the low-frequency radiation unit on the reflector plate at least partially overlaps with the projection of the corresponding first high-frequency radiation unit on the reflector plate.

10. The multi-frequency common-aperture antenna according to claim 7, 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 a plurality of first high-frequency radiation units, and the second high-frequency array includes a plurality of second high-frequency radiation units. The projections of the low-frequency radiation units on the reflector plate coincide with the projections of at least one first high-frequency radiation unit and at least one second high-frequency radiation unit on the reflector plate, respectively.

11. The multi-frequency common-aperture antenna according to claim 10, characterized in that, Each of the low-frequency radiation units corresponds to the position of four first high-frequency radiation units, and each of the low-frequency radiation units also corresponds to the position of four second high-frequency radiation units; each of the first high-frequency radiation units corresponds to the position of four second high-frequency radiation units.

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