Radiation unit and multi-frequency antenna

Abstract

The present application relates to a radiation unit (20) and a multi-frequency antenna. The radiation unit (20) comprises a radiation arm (21). The radiation arm (21) comprises a feeding portion (211) and a radiation ring (212). The radiation ring (212) is connected to the feeding portion (211). The radiation ring (212) comprises scattering suppression structures (213). The scattering suppression structures (213) are used to suppress signals in a preset operating frequency band. The scattering suppression structures (213) each comprise two conductor segments (2131) and a connecting segment (2132) connected between the conductor segments (2131). The two conductor segments (2131) have opposite current directions, and the connecting segment (2132) is a low-pass high-impedance segment. A spacing between the two conductor segments (2131) is a, the length of each conductor segment (2131) is b, a wavelength at the highest frequency point of the preset operating frequency band is λ1, and a wavelength at the lowest frequency point of an operating frequency band of the radiation arm (21) is λ2, where a + 2b ≤ 1 / 2λ1, and a ≥ 1 / 20λ2.

Description

Radiating element and multi-frequency antenna

[0001] Cross-reference to related applications

[0002] This disclosure claims priority to Chinese Patent Application No. 2024115872016, filed on November 7, 2024, entitled "Radiating Element and Multi-Frequency Antenna", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of mobile communication technology, and in particular to a radiating element and a multi-frequency antenna. Background Technology

[0004] With the development of mobile communication systems, antennas, as signal receiving / transmitting components in these systems, have also experienced rapid development. To achieve overall antenna miniaturization and support multi-band applications, multi-band common-aperture antennas are becoming increasingly widespread. Multi-band common-aperture antennas typically include radiating elements for at least two frequency bands: low-frequency and high-frequency. There is even a need for arrays with radiating elements from three frequency bands: low-frequency, mid-frequency, and high-frequency. Because the low-frequency radiating elements have a larger aperture and are usually taller than the radiating elements from other frequency bands, the induced current on the surface of the low-frequency radiating elements during arraying can cause scattering interference, thus reducing the performance of the radiating elements from other frequency bands.

[0005] In related technologies, to suppress scattering interference, scattering suppression structures are typically placed on the radiating arms of low-frequency radiating elements. These structures generate inductance to block high-frequency signals when they are sensed, thus achieving scattering suppression. However, to achieve better scattering suppression, a large number of scattering suppression structures are required, leading to a more complex radiating arm structure in the low-frequency radiating element, making it difficult to manufacture. Furthermore, an increase in the number of scattering suppression structures can negatively impact the performance of the low-frequency radiating element itself. Summary of the Invention

[0006] According to various embodiments of this application, this application provides a radiating element and a multi-frequency antenna.

[0007] A radiating unit includes a radiating arm, the radiating arm comprising a feed section and a radiating ring, the radiating ring being connected to the feed section, the radiating ring including a scattering suppression structure for suppressing signals in a preset operating frequency band, the scattering suppression structure including two conductor segments and a connecting segment connecting the conductor segments, the current directions of the two conductor segments being opposite, the connecting segment being a low-pass, high-impedance segment; the distance between the two conductor segments is a, the length of the conductor segments is b, the highest frequency wavelength of the preset operating frequency band is λ1, the lowest frequency wavelength of the operating frequency band of the radiating arm is λ2, wherein a+2b≤1 / 2λ1, a≥1 / 20λ2.

[0008] In one embodiment, there are multiple scattering suppression structures connected in series.

[0009] In one embodiment, the radiation ring further includes a plurality of interconnect segments, each of which is connected in series between any two adjacent scattering suppression structures.

[0010] In one embodiment, the length of the interconnect segment is C, 0. <C≤1 / 2λ1。

[0011] In one embodiment, the linewidth of the connecting segment is set to ≤1 / 50λ1, and / or the linewidth of the interconnecting segment is set to ≤1 / 50λ1, and / or the linewidth of the radiation ring is the same at all locations along its circumferential direction.

[0012] In one embodiment, the number of scattering suppression structures is 2 to 6.

[0013] In one embodiment, the plurality of scattering suppression structures include a first scattering suppression structure and a second scattering suppression structure, wherein the first scattering suppression structure and the second scattering suppression structure are arranged at an angle.

[0014] In one embodiment, the radiation arm is configured in an axisymmetric structure; a first scattering suppression structure and a second scattering suppression structure form a scattering suppression group, and at least one of the scattering suppression groups is provided on either side of the axis of symmetry Z of the radiation arm.

[0015] In one embodiment, each of the scattering suppression structures is formed with an opening; the opening of the scattering suppression structure near the feed portion faces the outside of the radiation ring; and / or, the opening of the scattering suppression structure away from the feed portion faces the inside of the radiation ring.

[0016] In one embodiment, the connecting segment includes one or more combinations of straight line segments, arc segments, S-shaped line segments, and broken line segments.

[0017] In one embodiment, the radiating arms are four in number and arranged in an orthogonal polarization.

[0018] In one embodiment, the radiating arm further includes a substrate, and the power supply section and the radiating ring are circuit layers disposed on the substrate; or, the radiating arm is configured as a sheet metal part.

[0019] A multi-frequency antenna includes a first radiating element, a second radiating element, and a reflector. The first radiating element and the second radiating element are disposed on the reflector. The operating frequency band of the first radiating element is lower than that of the second radiating element. The first radiating element is the same as described above. The projection of the first radiating element on the reflector is designated as a first projection, and the projection of the second radiating element on the reflector is designated as a second projection. The first projection and the second projection at least partially overlap.

[0020] In one embodiment, the four radiating arms of each first radiating element correspond to the positions of four second radiating elements, and the projection of the radiating arm of the first radiating element on the reflector plate at least partially overlaps with the projection of the corresponding second radiating element on the reflector plate.

[0021] Details of one or more embodiments of this application are set forth in the following drawings and description. Other features, objects, and advantages of this application will become apparent from the specification, drawings, and claims. Attached Figure Description

[0022] Figure 1 is a structural diagram of a radial arm according to an embodiment of the related technology.

[0023] Figure 2 is a structural diagram of the radiating arm of the first embodiment of this application.

[0024] Figure 3 is a structural diagram of the radiating arm of the second embodiment of this application.

[0025] Figure 4 is a structural diagram of the scattering suppression structure in the radiation arm of an embodiment of this application.

[0026] Figure 5 is a structural diagram of the scattering suppression structure in the radiation arm of another embodiment of this application.

[0027] Figure 6 is a structural diagram of the connecting segment in the radiating arm of an embodiment of this application.

[0028] Figure 7 is a structural diagram of the connecting segment in the radiating arm of another embodiment of this application.

[0029] Figure 8 is a structural diagram of a radiation unit according to an embodiment of this application.

[0030] Figure 9 is a structural diagram of a radiation unit according to another embodiment of this application.

[0031] Figure 10 is a structural diagram of a multi-frequency antenna according to an embodiment of this application.

[0032] Figure 11 is a comparison of the monostatic radar cross section (RCS) response curves of the three different radiating arms shown in Figures 1, 2, and 3 under plane wave excitation adjustment. 110, Conducting segment; 120, Inductive element; 121, Transmission line; 20, Radiating element; 21, Radiating arm; 211, Feed section; 212, Radiating ring; 213, Scattering suppression structure; 2131, Conducting segment; 2132, Connecting segment; 2133, Opening; 2134, Scattering suppression group; 2135, First scattering suppression structure; 2136, Second scattering suppression structure; 214, Interconnecting segment; 215, Substrate; 201, First radiating element; 202, Second radiating element; 203, Reflector. Detailed Implementation

[0033] 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.

[0034] As described in the background section, the large number of scattering suppression structures in existing technologies leads to complex radiating arm structures in low-frequency radiating units, making them difficult to manufacture. The inventors have discovered that this problem arises because, as shown in Figure 1, which illustrates a radiating arm structure according to an embodiment of the related technology, the radiating arm comprises multiple conductive segments 110 connected in series with multiple inductive elements 120 to form a closed-loop structure. The conductive segments 110 support low-frequency current flow, and the inductive elements 120 are configured to have relatively low impedance at low frequencies and relatively high impedance at high frequencies, thus serving to suppress scattering. For example, the inductive element 120 can be configured as a U-shaped structure as shown in Figure 1, where the distance S between the two transmission lines 121 is small. When a high-frequency signal is sensed, this creates inductance, thereby blocking high-frequency signals. However, a small distance S makes the radiating arm difficult to manufacture, especially by sheet metal processing. In addition, the linewidth W of the conductive segment 110 is designed to be relatively large. When the signal of the second radiating unit is radiated to the conductive segment 110, resonance will occur, thereby canceling the scattering suppression effect at the inductive element 120 and weakening the overall scattering suppression effect.

[0035] For the reasons mentioned above, this application provides a radiating element and a multi-frequency antenna that can effectively suppress scattering, is easy to manufacture, and has minimal impact on the performance of the low-frequency radiating element itself.

[0036] Referring to Figures 2, 4, and 5, Figure 2 shows a structural diagram of the radiating arm 21 of the first embodiment of this application, and Figures 4 and 5 respectively show structural diagrams of two scattering suppression structures 213 of different shapes in the radiating arm 21 of one embodiment. One embodiment of this application provides a radiating unit 20, which includes a radiating arm 21. The radiating arm 21 includes a feed section 211 and a radiating ring 212. The radiating ring 212 is connected to the feed section 211 and includes a scattering suppression structure 213. The scattering suppression structure 213 is used to suppress signals in a preset operating frequency band. The scattering suppression structure 213 includes two conductor segments 2131 and a connecting segment 2132 connecting the conductor segments 2131. The current directions of the two conductor segments 2131 are opposite, and the connecting segment 2132 is a low-pass, high-impedance segment. The distance between the two conductor segments 2131 is a, the length of the conductor segment 2131 is b, the wavelength of the highest frequency point of the preset operating frequency band is λ1, and the wavelength of the lowest frequency point of the operating frequency band of the radiating arm 21 is λ2, where a+2b≤1 / 2λ1 and a≥1 / 20λ2.

[0037] In some embodiments, the operating frequency band of the radiating arm 21 includes, but is not limited to, 698MHz to 960MHz. Correspondingly, a ≥ 15mm, where a is specifically, for example, 15mm, 16mm, 18mm, 20mm or 25mm, etc., and can be flexibly adjusted and set according to actual needs.

[0038] In some embodiments, the preset operating frequency band is higher than the operating frequency band of the radiating arm 21. Optionally, the preset operating frequency band includes, but is not limited to, 1427MHz~2690MHz or 3300MHz~4200MHz, etc., which can be flexibly adjusted and set according to actual needs, and is not limited here. As a specific embodiment, the operating frequency band of the radiating arm 21 is set to a low frequency band, and the preset operating frequency band is correspondingly set to a high frequency band.

[0039] In the aforementioned radiating unit 20, the mutual coupling between the two conductor segments 2131 decreases as the distance a increases. Since a ≥ 1 / 20λ2, meaning the distance a is relatively large, the mutual coupling between the two conductor segments 2131 is small. Therefore, in this application, the two conductor segments 2131 are in a weakly coupled state. When the current directions of the two conductor segments 2131 are opposite, the radiated fields generated by them cancel each other outward. Thus, the scattering suppression structure formed by the two conductor segments 2131 with opposite current directions and the low-pass, high-resistance segment in this application has a self-cancelling scattering function and a good scattering suppression effect. Furthermore, because the distance a is relatively large, the radiating arm 21 can be fabricated using both circuit board and sheet metal processes, making it easier to manufacture. Additionally, a+2b cannot be too large. When a+2b > 1 / 2λ1, it will induce a resonant mode in the preset operating frequency band. In other words, when a+2b ≤ 1 / 2λ1, it can ensure low scattering interference in the preset operating frequency band.

[0040] It should be noted that the connection between the radiating ring 212 and the feed section 211 can form either a closed-loop structure or a non-closed-loop structure. This embodiment specifically uses the combination of the radiating ring 212 and the feed section 211 to form a closed-loop structure as an example, meaning that the radiating arm 21 has a closed-loop structure. Specifically, the radiating arm 21 is closed-loop and hollow inside. When the radiating element 20 containing this radiating arm 21 is co-arrayed with the second radiating element 202, on the one hand, the scattering suppression structure 213 of the radiating arm 21 can suppress the high-frequency bandwidth; on the other hand, the hollow shape of the radiating arm 21 facilitates the transmission of high-frequency signals emitted by the second radiating element 202. Therefore, the radiating arm 21 participates less in the mutual coupling and scattering of the second radiating element 202, improving the radiation performance of the high-frequency antenna in co-array formation.

[0041] In some embodiments, the number of scattering suppression structures 213 is not limited to one, but can be multiple, such as two, three, four, five, six, or eight, etc., which can be set according to actual needs and are not limited here. When the number of scattering suppression structures 213 increases, the scattering suppression effect on the preset operating frequency band can be increased. In this embodiment, there are multiple scattering suppression structures 213, and the multiple scattering suppression structures 213 are connected in series.

[0042] Optionally, four or six scattering suppression structures 213 are arranged alternately on the radiation ring 212. A larger number of scattering suppression structures 213 results in better scattering suppression for the preset operating frequency band when the radiation arm 21 is operating. However, too many scattering suppression structures 213, such as more than six, can negatively impact the operating frequency band of the radiation arm 21. Therefore, setting the number of scattering suppression structures 213 to six or less ensures a moderate number and minimizes their impact on the operating frequency band of the radiation arm 21. Furthermore, a smaller number of scattering suppression structures 213 (less than six) makes the radiation arm 21 easier to manufacture.

[0043] In some embodiments, each scattering suppression structure 213 has an opening 2133. Specifically, the opening 2133 is formed by two conductor segments 2131 and a connecting segment 2132. Optionally, as shown in FIG4, the two conductor segments 2131 are, for example, perpendicular to the connecting segment 2132, so that the current directions of the two conductor segments 2131 are opposite, thereby canceling out the radiation fields that generate spatial radiation. Or, as shown in FIG5, the structure formed by the combination of the two conductor segments 2131 and the connecting segment 2132 is, for example, U-shaped, that is, the connection points of the two conductor segments 2131 and the connecting segment 2132 are allowed to be rounded, and the current directions of the two conductor segments 2131 are still opposite.

[0044] In some embodiments, the connecting segment 2132 includes one or more combinations of straight segments, arc segments, S-shaped segments, and broken line segments.

[0045] In some embodiments, the plurality of scattering suppression structures 213 include a first scattering suppression structure 2135 and a second scattering suppression structure 2136. The extension direction of the conductor segment 2131 of the first scattering suppression structure 2135 is angled to the extension direction of the conductor segment 2131 of the second scattering suppression structure 2136. In other words, at least one pair of scattering suppression structures 213 has its opening 2133 angled to the direction of its opening. One first scattering suppression structure 2135 and one second scattering suppression structure 2136 form a scattering suppression group 2134. Thus, the two scattering suppression structures 213 of the scattering suppression group 2134 are arranged in two different directions, thus providing suppression for the preset operating frequency band in both directions. This results in better scattering suppression for the radiating elements 20 at different arrangement positions, angles, and distances from the radiating arm 21 for each preset operating frequency band. Furthermore, it has a particularly good suppression effect on induced currents from the dual-polarized irradiation field. Specifically, the two scattering suppression structures 213 of the scattering suppression group 2134 are arranged adjacent to each other along the annular direction of the radiation ring 212.

[0046] In some embodiments, the angle between the extension direction of the conductor segment 2131 of the first scattering suppression structure 2135 and the extension direction of the conductor segment 2131 of the second scattering suppression structure 2136 is, but is not limited to, 60°, 70°, 80°, 90°, 100°, 110° or 120°, etc.

[0047] Specifically, the extension direction of the conductor segment 2131 of the first scattering suppression structure 2135 is perpendicular or substantially perpendicular to the extension direction of the conductor segment 2131 of the second scattering suppression structure 2136. Here, "substantially" perpendicular means that the extension directions of the conductor segments 2131 of the first scattering suppression structure 2135 and the second scattering suppression structure 2136 are not strictly 90° apart, but rather allow for a deviation within, for example, ±10°, while still being perpendicular to each other.

[0048] In some embodiments, referring to FIG2, the radiation ring 212 contains, for example, two scattering suppression groups 2134. Optionally, the two scattering suppression groups 2134 are arranged on opposite sides of the axis of symmetry Z of the radiation arm 21, and are arranged symmetrically about the axis of symmetry Z of the radiation arm 21. In this way, a better scattering suppression effect is achieved for signals in a preset operating frequency band. The axis of symmetry Z of the radiation arm 21 is also the direction of the polarization axis of the radiation arm 21.

[0049] In some embodiments, referring to FIG3, the radiation ring 212 has, for example, three scattering suppression groups 2134. The structure shown in FIG3, compared to the structure shown in FIG2, can have one more scattering suppression group 2134. The two scattering suppression structures 213 in this additional scattering suppression group 2134 are respectively arranged on opposite sides of the axis of symmetry Z of the radiation arm 21, and are, for example, symmetrically arranged about the axis of symmetry Z of the radiation arm 21. Thus, by increasing the number of scattering suppression structures 213, the length of the interconnecting segment 214 can be reduced, thereby preventing the interconnecting segment 214 from becoming too long and causing resonance that cancels out the scattering suppression effect.

[0050] Referring to Figure 2 or Figure 3, in some embodiments, the opening 2133 of the scattering suppression structure 213 near the feed section 211 faces outwards from the radiation ring 212; and / or, the opening 2133 of the scattering suppression structure 213 away from the feed section 211 faces inwards from the radiation ring 212. This allows the radiation arm 21 to occupy a larger area within a given space, thereby improving gain and directivity performance.

[0051] Referring to FIG. 2 or FIG. 3, in a specific embodiment, the radiation arm 21 is arranged in an axisymmetric structure, and at least one pair of scattering suppression structures 213 is provided on either side of the symmetry axis Z of the radiation arm 21. In addition, a first scattering suppression structure 2135 and a second scattering suppression structure 2136 form a scattering suppression group 2134.

[0052] Referring to FIG. 2 or FIG. 3, in some embodiments, the radiation loop 212 further includes a plurality of interconnecting segments 214. Each interconnecting segment 214 is correspondingly connected in series between any two adjacent scattering suppression structures 213. The interconnecting segment 214 serves to electrically connect any two adjacent scattering suppression structures 213, so that all the scattering suppression structures 213 are connected in series to form, for example, a closed-loop structure.

[0053] In one embodiment, the lengths of each interconnecting segment 214 are flexibly adjusted and set according to actual needs, which can be the same or different, and are not limited herein. Wherein, the length of the interconnecting segment 214 is C, 0 < C ≤ 1 / 2λ1. Thus, when the length C of the interconnecting segment 214 is greater than 1 / 2λ1, resonance will occur, and the resonance amount will increase as the length C increases, thereby offsetting the scattering suppression effect of the scattering suppression structure 213. That is, when C ≤ 1 / 2λ1, the resonance generated by the interconnecting segment 214 can be minimized, thereby enhancing the scattering suppression effect.

[0054] In some embodiments, referring to FIG. 2, the connecting segment 2132 is specifically, for example, set as a straight line, and the line width of the straight line is, for example, set to ≤ 1 / 50λ1, specifically, for example, 1 / 50λ1, 1 / 75λ1 or 1 / 100λ1, etc. Thus, due to the small line width, the shielding of the radiation unit 20 in the preset working frequency band below it is small, thereby improving the antenna performance; in addition, the inductance at the connecting segment 2132 increases as the line width decreases, serving to suppress the induced current in the preset working frequency band.

[0055] Of course, as some alternative solutions, referring to FIG. 6 or FIG. 7, the connecting segment 2132 can also be, for example, set as an inductor, or, for example, set as a combination form of an inductor and a capacitor, as long as it can play a role of low-pass and high-impedance.

[0056] In addition, similar to the line width setting method of the connecting segment 2132, optionally, the line width of the interconnecting segment 214 includes but is not limited to being set to ≤ 1 / 50λ1, specifically, for example, ≤ 1 / 75λ1, or even less than 1 / 100λ1, so as to reduce the resonance amount of the signal in the preset working frequency band and at the same time reduce the shielding of the radiation unit 20 in the preset working frequency band below it, thereby improving the antenna performance.

[0057] In one specific embodiment, the linewidth of the radiation ring 212 is the same at all locations along its annular direction. Specifically, the linewidth of the radiation ring 212 is set to ≤1 / 50λ1, for example, ≤1 / 75λ1, or even less than 1 / 100λ1, thereby reducing the resonance of signals in the preset operating frequency band and minimizing the obstruction of the radiating element 20 in the preset operating frequency band below it, thus improving antenna performance.

[0058] In some embodiments, the radiating arm 21 further includes a substrate 215, as shown in FIG9. The power supply section 211 and the radiating ring 212 are, for example, circuit layers disposed on the substrate 215. In a specific configuration, the substrate 215 and the circuit layers can be fabricated using a printed circuit method, that is, the circuit layers are printed on the substrate 215 to form a printed circuit board, or the substrate 215 can be made of plastic or ceramic material, and the circuit layers can be formed on the substrate 215 using other circuit fabrication methods.

[0059] Alternatively, the radiating arm 21 may be made without a substrate 215 and may be manufactured, for example, using sheet metal processing, as shown in Figure 8.

[0060] Please refer to Figures 1, 2, 3, and 11. Figure 11 shows a comparison of the monostatic radar cross section (RCS) response curves of three different radiating arms 21 with the structures shown in Figures 1, 2, and 3 under plane wave excitation adjustment. As can be seen from Figure 11, compared with the first embodiment and related technologies, when four scattering suppression structures 213 are added, and the openings 2133 of two pairs of scattering suppression structures 213 are perpendicular to each other, a better scattering suppression effect can be achieved for signals in the 1427MHz–2690MHz and 3300MHz–4200MHz ranges. Compared with the second embodiment and related technologies, when six scattering suppression structures 213 are added, and the openings 2133 of three pairs of scattering suppression structures 213 are perpendicular to each other, a better scattering suppression effect can be achieved for signals in the 1427MHz–2690MHz and 3300MHz–4200MHz ranges. Comparing the first and second embodiments, the second embodiment has a better scattering suppression effect for signals in the 1427MHz–2690MHz and 3300MHz–4200MHz ranges.

[0061] In one embodiment, the radiating arms 21 are four in an orthogonally polarized arrangement.

[0062] In some embodiments, the radiating unit 20 further includes a balun, which is electrically connected to the power supply unit 211.

[0063] Referring to Figure 10, in one embodiment, this application also provides a multi-frequency antenna, which includes a first radiating element 201, a second radiating element 202, and a reflector 203. The first radiating element 201 and the second radiating element 202 are disposed on the reflector 203. The operating frequency band of the first radiating element 201 is lower than that of the second radiating element 202. The first radiating element 201 adopts the radiating element 20 of any of the above embodiments. The projection of the first radiating element 201 on the reflector 203 is designated as the first projection, and the projection of the second radiating element 202 on the reflector 203 is designated as the second projection. The first projection and the second projection at least partially overlap.

[0064] In the aforementioned multi-frequency antenna, the mutual coupling between the two conductor segments 2131 decreases as the distance a increases. Since a ≥ 1 / 20λ², meaning the distance a is relatively large, the mutual coupling between the two conductor segments 2131 is small. Therefore, in this application, the two conductor segments 2131 are in a weakly coupled state. When the current directions of the two conductor segments 2131 are opposite, the radiation fields generated by them cancel each other outward. Thus, the scattering suppression structure formed by the two conductor segments 2131 with opposite current directions and the low-pass, high-impedance segment in this application has a self-cancelling scattering function and a good scattering suppression effect. Furthermore, due to the large distance a, the radiating arm 21 can be fabricated using both circuit board and sheet metal processes, making it easier to manufacture. Additionally, a+2b cannot be too large. When a+2b > 1 / 2λ¹, it will induce a resonant mode in the preset operating frequency band. In other words, when a+2b ≤ 1 / 2λ¹, it can ensure low scattering interference in the preset operating frequency band.

[0065] Referring to Figure 10, in one specific embodiment, the four radiating arms 21 of each first radiating unit 201 correspond to the positions of the four second radiating units 202. The projection of the radiating arm 21 of the first radiating unit 201 onto the reflector 203 at least partially overlaps with the projection of the corresponding second radiating unit 202 onto the reflector 203. This achieves a compact layout and a smaller overall aperture size for the product.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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 radiation unit, the radiation unit comprising a radiation arm, the radiation arm comprising: The device comprises a power supply section and a radiation ring, the radiation ring being connected to the power supply section. The radiation ring includes a scattering suppression structure for suppressing signals within a preset operating frequency band. The scattering suppression structure includes two conductor segments and a connecting segment between the conductor segments. The current directions of the two conductor segments are opposite. The connecting segment is a low-pass, high-impedance segment. The distance between the two conductor segments is 'a', the length of the conductor segments is 'b', the highest frequency wavelength of the preset operating frequency band is λ1, and the lowest frequency wavelength of the operating frequency band of the radiation ring is λ2, wherein a + 2b ≤ 1 / 2λ1, and a ≥ 1 / 20λ2.

2. The radiating unit according to claim 1, wherein, The scattering suppression structure is multiple, and the multiple scattering suppression structures are connected in series.

3. The radiating unit according to claim 2, wherein, The radiation ring also includes multiple interconnect segments, each of which is connected in series between any two adjacent scattering suppression structures.

4. The radiating unit according to claim 3, wherein, The length of the interconnect segment is C,0 <C≤1 / 2λ1。 5. The radiating unit according to claim 3 or 4, wherein, The linewidth of the connecting segment is set to ≤1 / 50λ1, and / or the linewidth of the interconnecting segment is set to ≤1 / 50λ1, and / or the linewidth of the radiation ring is the same at all locations along its circumferential direction.

6. The radiating element according to any one of claims 2 to 5, wherein, The number of scattering suppression structures is 2 to 6.

7. The radiating element according to any one of claims 2 to 6, wherein, The plurality of scattering suppression structures include a first scattering suppression structure and a second scattering suppression structure, wherein the first scattering suppression structure and the second scattering suppression structure are arranged at an angle.

8. The radiating unit according to claim 7, wherein, The radiation arm is configured in an axisymmetric structure; a first scattering suppression structure and a second scattering suppression structure form a scattering suppression group, and at least one of the scattering suppression groups is provided on either side of the axis of symmetry Z of the radiation arm.

9. The radiating element according to any one of claims 2 to 8, wherein, Each of the scattering suppression structures has an opening; the opening of the scattering suppression structure near the feed section faces the outside of the radiation ring; And / or, the opening of the scattering suppression structure, which is away from the feed section, faces the interior of the radiation ring.

10. The radiating element according to any one of claims 1 to 9, wherein, The connecting segment includes one or more combinations of straight line segments, arc segments, S-shaped line segments, and broken line segments.

11. The radiating element according to any one of claims 1 to 10, wherein, The radiating arms are configured as four and arranged in an orthogonal polarization.

12. The radiating element according to any one of claims 1 to 11, wherein, The radiating arm further includes a substrate, and the power supply section and the radiating ring are circuit layers disposed on the substrate; Alternatively, the radiating arm may be a sheet metal component.

13. A multi-frequency antenna, the multi-frequency antenna comprising a first radiating element, a second radiating element, and a reflector, wherein the first radiating element and the second radiating element are disposed on the reflector, the operating frequency band of the first radiating element is lower than the operating frequency band of the second radiating element, the first radiating element is a radiating element as described in any one of claims 1 to 12, the projection of the first radiating element on the reflector is designated as a first projection, the projection of the second radiating element on the reflector is designated as a second projection, and the first projection and the second projection at least partially overlap.

14. The multi-frequency antenna according to claim 13, wherein, The four radiating arms of each of the first radiating units correspond to the positions of the four second radiating units, and the projection of the radiating arm of the first radiating unit on the reflector plate at least partially overlaps with the projection of the corresponding second radiating unit on the reflector plate.

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