Feed source assembly and antenna

Abstract

The invention provides a feed source assembly and an antenna, the feed source assembly comprises a waveguide tube, a medium and an auxiliary reflecting surface, the waveguide tube comprises a first end and a second end, the inner wall of the waveguide tube comprises one or more annular structures arranged close to the first end, the one or more annular structures are sequentially arranged from the first end to the second end, and the medium is arranged between the first end and the second end. The axis of each annular structure extends along the axial direction of the waveguide tube; one end of the medium is inserted into the waveguide tube from the first end; the sub-reflector is fixed at one end of the medium away from the waveguide. According to the feed source assembly provided by the invention, good impedance matching performance in a relatively wide frequency band can be obtained, so that the bandwidth of an antenna can be improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a feed assembly and an antenna. Background Art

[0002] The rapid development of 5G technology has increased the data traffic of base stations. Microwave communication, as one of the common means of data backhaul for base stations, faces huge challenges. In order to meet the requirements of data backhaul for base stations, the microwave backhaul link needs to have a sufficiently large transmission capacity. At present, microwave communication systems generally increase transmission capacity by increasing the working frequency band. For traditional narrowband microwave antennas, increasing the working frequency band requires the deployment of multiple antennas, which will lead to a significant increase in the system's material cost, installation cost, and tower rental cost. Based on this, how to broaden the bandwidth of microwave antennas is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The present application provides a feed assembly and an antenna to improve the bandwidth of the antenna.

[0004] In a first aspect, the present application provides a feed assembly, which may include a waveguide, a medium, and a sub-reflection surface. The waveguide includes a first end and a second end arranged opposite to each other in an axial direction, and the inner wall of the waveguide includes one or more annular structures arranged near the first end thereof, the one or more annular structures are arranged in sequence in a direction from the first end to the second end, and the axis of each annular structure extends along the axial direction of the waveguide; the medium can be used for impedance matching, one end of the medium can be inserted into the waveguide from the first end of the waveguide, and the sub-reflection surface is fixed to the end of the medium away from the waveguide.

[0005] In the present application, the annular structure of the waveguide can be used for impedance matching. Compared with the conventional technology that achieves impedance matching only by structural design of the medium, the present application adds an adjustable dimension, that is, the feed component can use the waveguide and the medium to perform impedance matching together, so that the feed component can obtain good impedance matching performance within a wider frequency band, thereby helping to improve the bandwidth of the antenna.

[0006] In some embodiments, the waveguide has a metal inner wall to facilitate the transmission of electromagnetic waves therein. Exemplarily, the waveguide can be made of all-metal material, in which case the inner wall of the waveguide is also naturally a metal inner wall. Alternatively, the waveguide can be made of other non-metallic materials, in which case the metal inner wall can be obtained by metallizing the inner wall of the waveguide such as electroplating.

[0007] In some embodiments, along the direction from the first end to the second end, the end of the first annular structure facing the first end of the waveguide is located in the same plane as the first end of the waveguide. That is, the top of the annular structure closest to the first end of the waveguide is flush with the first end of the waveguide. By properly designing the position of the annular structure in the waveguide, it is helpful to achieve a better impedance matching effect for the waveguide.

[0008] In some embodiments, there are multiple annular structures, wherein the end of at least one annular structure facing the first end and the end of another adjacent annular structure facing the second end may be located in the same plane. That is, the top of at least one annular structure is flush with the bottom of another adjacent annular structure. Reasonable design of the relative positions of the annular structures also helps to achieve better impedance matching effects for the waveguide.

[0009] In some embodiments, there are multiple annular structures, wherein at least one annular structure is spaced apart from another adjacent annular structure. This solution also provides a relative position relationship that the annular structures can adopt, so that the waveguide can achieve a better impedance matching effect.

[0010] In some embodiments, there are multiple annular structures, wherein at least two annular structures have the same length. Reasonable design of the length of each annular structure helps to achieve a better impedance matching effect for the waveguide.

[0011] In some embodiments, there are multiple annular structures, wherein at least two annular structures have different lengths. This solution also provides a possible design method for the length of the annular structure, so that the waveguide can achieve a better impedance matching effect.

[0012] In some embodiments, there are multiple annular structures, and the radial dimensions of the multiple annular structures along the waveguide are different. Reasonable design of the radial dimensions of each annular structure helps to achieve a better impedance matching effect for the waveguide.

[0013] Exemplarily, along the direction from the first end to the second end, the radial dimensions of the plurality of annular structures along the waveguide may decrease in sequence. Alternatively, along the direction from the first end to the second end, the radial dimensions of the plurality of annular structures along the waveguide may increase in sequence.

[0014] In some embodiments, there are multiple annular structures, wherein the radial dimension of at least one annular structure along the waveguide tube may be larger than the radial dimension of two adjacent annular structures along the waveguide tube; or, the radial dimension of at least one annular structure along the waveguide tube may be smaller than the radial dimension of two adjacent annular structures along the waveguide tube.

[0015] In addition, in the above scheme, the radial dimensions of two adjacent annular structures of at least one annular structure along the waveguide may be the same; or, the radial dimensions of two adjacent annular structures of at least one annular structure along the waveguide may be different.

[0016] In some embodiments, there are multiple annular structures, wherein at least two annular structures have the same radial size along the waveguide, and the two annular structures having the same radial size along the waveguide are arranged at intervals. This solution provides a relative position relationship that can be adopted by two annular structures having the same radial size, and the purpose is also to enable the waveguide to achieve a better impedance matching effect.

[0017] In some embodiments, the one or more annular structures may be annular protrusions. In this case, the inner diameter of the inner wall of the waveguide at the annular structure is smaller than the inner diameter of the waveguide. In other embodiments, the one or more annular structures may be annular grooves. In this case, the inner diameter of the inner wall of the waveguide at the annular structure is larger than the inner diameter of the waveguide. By rationally designing the number of annular structures, it is helpful to achieve a better impedance matching effect for the waveguide.

[0018] In the second aspect, the present application further provides an antenna, which may include a main reflection surface and a feed assembly in any embodiment of the first aspect, and the second end of the waveguide may pass through the main reflection surface. When the antenna is used to transmit a signal, the waveguide may receive an electromagnetic wave signal generated by a transmitter of a microwave device, and transmit the signal to the sub-reflection surface, which is then reflected by the sub-reflection surface to the main reflection surface, and finally radiated to space through the main reflection surface; when the antenna is used to receive a signal, the electromagnetic wave in the space is converged and reflected to the sub-reflection surface by the main reflection surface, which is then focused by the sub-reflection surface to the waveguide, and finally transmitted to the receiver of the microwave device through the waveguide. Since the feed assembly can obtain good impedance matching performance in a wider frequency band, the bandwidth of the antenna can be widened.

[0019] In a third aspect, the present application also provides a microwave device, which may include an antenna cover and the antenna in the aforementioned second aspect. The antenna cover has good electromagnetic wave penetration characteristics in electrical performance and can withstand the influence of harsh external environment in mechanical performance, thereby reducing the adverse effects of the external environment on the antenna without affecting the antenna's receiving and transmitting signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a microwave network architecture provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure of an antenna provided in an embodiment of the present application;

[0022] Figure 3A local structure of a feed assembly provided in an embodiment of the present application;

[0023] Figure 4 for Figure 3 A schematic diagram of the feed assembly shown in section AA;

[0024] Figure 5 for Figure 3 Another schematic diagram of the feed assembly in section AA shown in FIG.

[0025] Figure 6 for Figure 3 Another schematic diagram of the feed assembly in section AA shown in FIG.

[0026] Figure 7 for Figure 3 Another schematic diagram of the feed assembly in section AA shown in FIG.

[0027] Figure 8 for Figure 3 Another schematic diagram of the feed assembly in section AA shown in FIG.

[0028] Fig. 9 for Figure 3 Another schematic diagram of the feed assembly in section AA shown in FIG.

[0029] Fig.10 for Figure 3 Another schematic diagram of the feed assembly in section AA shown in FIG.

[0030] Fig.11 for Figure 3 Another schematic diagram of the feed assembly in section AA shown in FIG.

[0031] Fig.12 for Figure 3 Another schematic diagram of the feed assembly in section AA shown in FIG.

[0032] Fig.13 for Figure 3 Another schematic diagram of the feed assembly in section AA shown in FIG.

[0033] Fig.14 for Figure 3 Another schematic diagram of the feed assembly at section AA is shown in FIG.

[0034] Reference numerals:

[0035] 100-reflecting member; 110-main reflecting surface; 120-through hole;

[0036] 200-feed assembly; 210-waveguide; 210a-first end of the waveguide; 210b-second end of the waveguide;

[0037] 211, 211a, 211b, 211c, 211d-annular structure; 220-medium; 221-recessed area; 230-structural member; 231-sub-reflecting surface. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. However, the example implementation can be implemented in various forms and should not be construed as being limited to the implementations set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all illustrated by taking the accompanying drawings as examples, but changes may be made as needed, and the changes made are all included in the scope of protection of the present application. The drawings of the embodiments of the present application are only used to illustrate the relative position relationship and do not represent the true proportion.

[0039] It should be noted that specific details are described in the following description to facilitate understanding of the present application. However, the embodiments of the present application can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the embodiments of the present application. Therefore, the present application is not limited to the specific implementation methods disclosed below.

[0040] Figure 1 The following is a schematic diagram showing an architecture of a microwave network system applicable to the embodiments of the present application. Figure 1 As shown, the microwave network system can be used for backhaul or fronthaul of wireless signals, which may include two or more microwave devices and a microwave link between any two microwave devices. Microwave devices can communicate with each other through antennas, and a microwave device may include one or more antennas. The antenna may be mounted on a mounting structure, which may be, for example, a pole, a tower, or a building.

[0041] In the embodiment of the present application, the microwave device may also include modules such as a transmitter and a receiver. Taking microwave device 1 as a transmitting end and microwave device 2 as a receiving end as an example, the antenna of microwave device 1 receives a signal sent by the transmitter of microwave device 1, and sends the signal to the antenna of microwave device 2 through a microwave link, and the antenna of microwave device 2 further transmits the received signal to the receiver of microwave device 2.

[0042] In addition, the microwave equipment may also include an antenna cover, which has good electromagnetic wave penetration characteristics and can withstand the influence of harsh external environments, thereby reducing the adverse effects of the external environment on the antenna without affecting the antenna's receiving and transmitting signals.

[0043] Figure 2This is a schematic diagram of the structure of an antenna provided in an embodiment of the present application. Figure 2 As shown, in the embodiment of the present application, the antenna may include a reflector 100 and a feed assembly 200, and the reflector 100 is fixedly connected to the feed assembly 200. The reflector 100 may be a structure with one side concave and one side convex, and the concave surface of the reflector 100 may serve as the main reflector 110 of the antenna, and the main reflector 110 may be used to receive electromagnetic waves from space or radiate electromagnetic waves into space. Exemplarily, the main reflector 110 may be a parabola.

[0044] In a specific implementation, the main reflective surface 110 may be a metal surface, such as aluminum or other metals. The reflector 100 may be provided with a through hole 120 extending from the main reflective surface 110 to its outer convex surface, and the axis of the through hole 120 may roughly coincide with the central axis of the main reflective surface 110. Exemplarily, the reflector 100 may be made of all-metal material, so that the main reflective surface 110 formed by the inner concave surface of the reflector 100 is naturally a metal surface. In another implementation, the reflector 100 may be made of other non-metallic materials, such as plastic, and the main reflective surface 110 may be obtained by performing a metallization treatment such as electroplating on the inner concave surface of the reflector 100.

[0045] Figure 3 This is a partial structure of a feed assembly 200 provided in an embodiment of the present application. Figure 2 and Figure 3 The feed assembly 200 may include a waveguide tube 210, a medium 220, and a structural member 230 for providing a secondary reflector, wherein the waveguide tube 210 includes a first end 210a and a second end 210b that are opposite to each other in the axial direction, the first end 210a of the waveguide tube 210 may be used to install the medium 220, the second end 210b of the waveguide tube 210 may be inserted into the through hole 120 of the reflector 100 from the side where the main reflector 110 is located, and may extend to the side where the outer convex surface of the reflector 100 is located, and the second end 210b of the waveguide tube 210 may be used to connect to a transmitter or a receiver; one end of the medium 220 is inserted into the waveguide tube 210 from the first end 210a of the waveguide tube 210, and the other end is exposed outside the waveguide tube 210, and the structural member 230 for providing a secondary reflector may be fixed to the end of the medium 220 exposed outside the waveguide tube 210.

[0046] It can be seen that the medium 220 can structurally connect the waveguide 210 and the sub-reflector 231, and support the sub-reflector 231. In addition, in terms of electrical performance, the medium 220 will also affect the return loss of the antenna and the amplitude and phase of the electromagnetic wave. The medium 220 can be made of a dielectric material with a stable dielectric constant and low loss, such as polycarbonate (PC), polyphenylene oxide (PPO) and other materials. The portion of the medium 220 placed in the waveguide 210 can be in the shape of a stepped shaft, or can be regarded as a plurality of cylinders or truncated cones with different diameters stacked together. Similarly, the portion of the medium 220 exposed outside the waveguide can also be a plurality of cylinders or truncated cones with different diameters stacked together. These cylinders or truncated cone structures can enable the medium 220 to play a certain impedance matching role, thereby helping the antenna to obtain a higher gain.

[0047] Figure 4 for Figure 3 A schematic diagram of the feed assembly in section AA is shown in FIG. Figure 3 and Figure 4 As shown, the end surface of the medium 220 exposed outside the waveguide 210 may have a recessed area 221, and the shape of the side of the structural member 230 facing the medium 220 may be complementary to the recessed area 221, so that the structural member 230 and the medium 220 are in contact, and the surface where the structural member 230 and the medium 220 are in contact is the secondary reflective surface 231. The secondary reflective surface 231 may be used to receive electromagnetic waves from the waveguide 210 and radiate them to the main reflective surface 110, or receive electromagnetic waves radiated by the main reflective surface 110 and transmit them to the waveguide 210. By reasonably designing the shape and size of the secondary reflective surface 231, the spatial distribution of the amplitude and phase of the electromagnetic waves reflected by it may be adjusted.

[0048] Exemplarily, the structural member 230 may be made of all metal or non-metal. When the structural member 230 is made of non-metal, the secondary reflector 231 may be obtained by performing a metallization treatment such as electroplating on the surface of the structural member 230 facing the medium 220 .

[0049] In the embodiment of the present application, when the microwave device transmits a signal as a transmitting end, the electromagnetic wave signal generated by the transmitter is transmitted to the sub-reflecting surface 231 through the waveguide 210, then reflected to the main reflecting surface 110 by the sub-reflecting surface 231, and finally radiated to space through the main reflecting surface 110. When the microwave device receives a signal as a receiving end, the electromagnetic wave in the external space is converged and reflected to the sub-reflecting surface 231 through the main reflecting surface 110, then focused to the waveguide 210 by the sub-reflecting surface 231, and finally transmitted to the receiver through the waveguide 210.

[0050] Please continue to refer to Figure 4In the embodiment of the present application, the waveguide 210 may have a metal inner wall to facilitate the transmission of electromagnetic waves between the transmitter / receiver and the secondary reflector 231. Similar to the aforementioned reflector or structural member 230, in one implementation, the waveguide 210 may be made of all-metal material, such as aluminum, etc., and the inner wall of the waveguide 210 is naturally a metal inner wall; in another implementation, the waveguide 210 may be made of other non-metallic materials, and the metal inner wall may be obtained by performing metallization treatment such as electroplating on the inner wall of the waveguide 210.

[0051] In a specific implementation, the inner wall of the waveguide 210 may include an annular structure 211, which is disposed near the first end 210a of the waveguide 210, that is, near the end of the waveguide 210 for connecting to the medium 220. The axis of the annular structure 211 may extend along the axial direction of the waveguide. For example, the axis of the annular structure 211 and the axis of the waveguide 210 may be substantially coaxial. In the embodiment of the present application, the annular structure 211 of the waveguide 210 may be used for impedance matching. Compared with the solution of achieving impedance matching only by structural design of the medium 220 in the conventional technology, the embodiment of the present application adds an adjustable dimension, that is, the feed assembly 200 can use the waveguide 210 and the medium 220 to perform impedance matching together, so that the feed assembly 200 can obtain good impedance matching performance in a wider frequency band, thereby helping to improve the bandwidth of the antenna.

[0052] In the embodiment of the present application, the above-mentioned annular structure 211 may be one or more, and the present application does not limit this. Here, the more may include two, or a number greater than two, such as three, four, etc. In the case where there are multiple annular structures 211, the multiple annular structures 211 may be arranged in sequence from the first end 210a of the waveguide 210 to the second end 120b thereof. By reasonably designing the number of the annular structures 211, it is helpful to achieve a better impedance matching effect for the waveguide 210.

[0053] In addition, the annular structure 211 may include an annular protrusion or an annular groove. It is easy to understand that when the annular structure 211 is an annular protrusion, the inner diameter of the inner wall of the waveguide 210 at the annular structure 211 is smaller than the inner diameter of the waveguide 210, and when the annular structure 211 is an annular groove, the inner diameter of the inner wall of the annular structure 211 at the annular structure is larger than the inner diameter of the waveguide 210. Similarly, by reasonably designing the structural form of the annular structure 211, the waveguide 210 can also achieve a better impedance matching effect.

[0054] Continue to refer Figure 4 , Figure 4FIG. 2 shows a case where the inner wall of the waveguide tube includes a plurality of annular structures 211. For example, the number of the annular structures 211 may be three. The three annular structures 211 in the figure include annular structures 211a, 211b, and 211c. In this embodiment, the plurality of annular structures 211 may all be annular protrusions. In addition, the dimensions of the plurality of annular structures 211 along the radial direction of the waveguide tube 210 may be different. For example, along the direction from the first end 210a of the waveguide tube 210 to the second end 210b thereof, that is, Figure 4 In the x direction, the radial dimensions of the plurality of annular structures 211 along the waveguide 210 may decrease in sequence. In this case, the difference in the radial dimensions of any two adjacent annular structures 211 along the waveguide 210 may be the same, that is, the difference in the radial dimensions of the annular structure 211a and the annular structure 211b along the waveguide 210, and the difference in the radial dimensions of the annular structure 211b and the annular structure 211c along the waveguide are the same. Of course, the difference in the radial dimensions of any two adjacent annular structures 211 along the waveguide 210 may also be different.

[0055] In some embodiments, at least two annular structures 211 may have the same length, that is, at least two annular structures 211 may have the same size along the axial direction of the waveguide 210. For example, the annular structure 211a has the same length as the annular structure 211b.

[0056] In some embodiments, at least two annular structures 211 may have different lengths. For example, the lengths of the annular structure 211b and the annular structure 211c may be different.

[0057] Of course, in some other embodiments, the lengths of the multiple ring structures 211 may all be the same, partially the same, or different. If they are different, in the specific implementation, the lengths of the multiple ring structures may gradually increase in a certain direction, or gradually decrease, may increase with equal differences, may decrease with equal differences, or change the size with different differences. These can be designed according to actual needs and will not be elaborated here.

[0058] Continue to refer Figure 4 , along the direction from the first end 210a of the waveguide 210 to the second end 210b thereof, the first annular structure 211 (such as Figure 4 That is, the top of the annular structure 211a closest to the first end 210a of the waveguide 210 is flush with the first end 210a of the waveguide 210.

[0059] In addition, when there are multiple annular structures 211, the end of at least one annular structure 211 facing the first end 210a of the waveguide 210 can be located in the same plane as the end of another adjacent annular structure 211 facing the second end 210b of the waveguide 210. Or it can be understood that along the arrangement direction from the first end 210a of the waveguide 210 to its second end 210b, the top of an annular structure 211 located below is flush with the bottom of an annular structure 211 located below it. In other words, multiple annular structures are seamlessly connected. For example, Figure 4 In the illustrated embodiment, the top end of the annular structure 211c may be flush with the bottom end of the annular structure 211b, and the top end of the annular structure 211b may be flush with the top end of the annular structure 211a.

[0060] Figure 5 for Figure 3 Another schematic diagram of the feed assembly 200 at section AA is shown in FIG. Figure 5 FIG. 2 shows another case where the inner wall of the waveguide 210 includes a plurality of annular structures 211. In this embodiment, along the direction from the first end 210a of the waveguide 210 to the second end 210b thereof, the end of the first annular structure 211 facing the first end 210a of the waveguide 210 may be spaced a certain distance from the first end 210a of the waveguide 210, that is, the top of the annular structure 211 closest to the first end 210a of the waveguide 210 is not in the same plane as the first end 210a of the waveguide 210. The radial dimensions and lengths of each annular structure 211 along the waveguide 210 may refer to FIG. Figure 4 The embodiment shown is designed and will not be repeated here.

[0061] Figure 6 for Figure 3 Another schematic diagram of the feed assembly 200 at section AA is shown in FIG. Figure 6 Another case where the inner wall of the waveguide 210 includes a plurality of annular structures 211 is shown. In this embodiment, the radial dimensions of the plurality of annular structures 211 along the waveguide 210 may be different from each other, and the radial dimensions of the plurality of annular structures 211 along the waveguide 210 may increase in sequence along the direction from the first end 210a of the waveguide 210 to the second end 210b thereof. Similarly, in this case, the difference in the radial dimensions of any two adjacent annular structures 211 along the waveguide 210 may be the same, that is, the difference in the radial dimensions of the waveguide 210 between the annular structure 211a and the annular structure 211b, and the difference in the radial dimensions of the waveguide 210 between the annular structure 211b and the annular structure 211c are the same. Of course, the difference in the radial dimensions of the waveguide 210 between any two adjacent annular structures 211 may also be different.

[0062] In addition, Figure 6In the embodiment shown, the length of each annular structure 211 and the location of each annular structure 211 in the waveguide 210 can be referred to as Figure 4 or Figure 5 The embodiment shown is designed and will not be repeated here.

[0063] Figure 7 for Figure 3 Another schematic diagram of the feed assembly 200 at section AA is shown in FIG. Figure 7 Another case is shown in which the inner wall of the waveguide 210 includes a plurality of annular structures 211. In this embodiment, the radial dimension of at least one annular structure 211 along the waveguide 210 may be greater than the radial dimensions of two adjacent annular structures 211 along the waveguide 210. For example, the radial dimension of the annular structure 211b along the waveguide 210 may be greater than the radial dimensions of the annular structures 211a and 211c along the waveguide 210.

[0064] In addition, Figure 7 In the embodiment shown, the length of each annular structure 211 and the location of each annular structure 211 in the waveguide 210 can be referred to as Figure 4 or Figure 5 The embodiment shown is designed and will not be repeated here.

[0065] Figure 8 for Figure 3 Another schematic diagram of the feed assembly 200 at section AA is shown in FIG. Figure 8 Another case is shown in which the inner wall of the waveguide 210 includes a plurality of annular structures 211. In this embodiment, the radial dimension of at least one annular structure 211 along the waveguide 210 may be smaller than the radial dimensions of two adjacent annular structures 211 along the waveguide 210. For example, the radial dimension of the annular structure 211b along the waveguide 210 may be larger than the radial dimensions of the annular structures 211a and 211c along the waveguide 210.

[0066] Similarly, in Figure 8 In the embodiment shown, the length of each annular structure 211 and the location of each annular structure 211 in the waveguide 210 can be referred to as Figure 4 or Figure 5 The embodiment shown is designed and will not be repeated here.

[0067] In addition, Figure 7 and Figure 8In the illustrated embodiment, the radial dimension of the annular structure 211a and the radial dimension of the annular structure 211c along the waveguide 210 may be the same or different. That is, the radial dimensions of two annular structures 211 adjacent to each other in at least one annular structure 211 along the waveguide 210 may be the same or different, which may be designed according to actual needs and will not be described in detail here.

[0068] Fig. 9 for Figure 3 Another schematic diagram of the feed assembly 200 at section AA is shown in FIG. Fig. 9 FIG. 2 shows another case where the inner wall of the waveguide 210 includes a plurality of annular structures 211. For example, in this embodiment, the inner wall of the waveguide 210 includes two annular structures 211, annular structure 211a and annular structure 211b. Figure 4 Compared with the embodiment shown in FIG. 1 , the number of the annular structures 211 is reduced in this embodiment, and the radial size, length and the location of each annular structure 211 in the waveguide 210 can be referred to in Figures 4 to 6 The embodiment shown is designed and will not be repeated here.

[0069] Fig.10 for Figure 3 Another schematic diagram of the feed assembly 200 at section AA is shown in FIG. Fig.10 FIG. 2 shows another case where the inner wall of the waveguide 210 includes a plurality of annular structures 211. For example, in this embodiment, the inner wall of the waveguide 210 includes four annular structures 211: annular structure 211a, annular structure 211b, annular structure 211c, and annular structure 211d. Figure 4 Compared with the embodiment shown in FIG. 1 , the number of the annular structures 211 is increased in this embodiment, and the size of each annular structure 211 and the location of each annular structure 211 in the waveguide 210 can be referred to in Figures 3 to 7 The embodiment shown is designed and will not be repeated here.

[0070] Fig.11 for Figure 3 Another schematic diagram of the feed assembly 200 at section AA is shown in FIG. Fig.11Another case where the inner wall of the waveguide 210 includes a plurality of annular structures 211 is shown. In this embodiment, when there are a plurality of annular structures 211, at least one annular structure 211 is spaced apart from another adjacent annular structure 211, for example, the annular structure 211c is spaced apart from the annular structure 211b. In addition, the top end of the annular structure 211b may be flush with the bottom end of the annular structure 211a. That is, when the number of the annular structures 211 is greater than or equal to three, at least one annular structure 211 is spaced apart from another adjacent annular structure 211, and the end of at least one annular structure 211 toward the first end 210a of the waveguide 210 may be located in the same plane as the end of another adjacent annular structure 211 toward the second end 210b of the waveguide 210.

[0071] exist Fig.11 In the embodiment shown, the size, quantity and location of each annular structure 211 in the waveguide 210 can be referred to Figures 4 to 10 In addition, in this embodiment, the sizes of the annular structure 211c and the annular structure 211b along the radial direction of the waveguide 210 may be the same or different. That is, in the case of multiple annular structures 211, the sizes of at least two annular structures 211 along the radial direction of the waveguide 210 may be the same, and the two annular structures 211 with the same size along the radial direction of the waveguide 210 are arranged at intervals.

[0072] Fig.12 for Figure 3 Another schematic diagram of the feed assembly 200 at section AA is shown in FIG. Fig.12 Another case where the inner wall of the waveguide 210 includes a plurality of annular structures 211 is shown. In this embodiment, the annular structure 211c is spaced apart from the annular structure 211b, and the annular structure 211b is spaced apart from the annular structure 211a. That is, when the number of the annular structures 211 is greater than or equal to three, any two adjacent annular structures 211 can be spaced apart. It is understandable that the spacing between different annular structures and their upper and lower adjacent annular structures can be the same or different, and this application is not limited thereto.

[0073] exist Fig.12 In the embodiment shown, the size, quantity and location of each annular structure 211 in the waveguide 210 can be referred to Figures 4 to 10In addition, in this embodiment, the radial dimensions of the annular structure 211c and the annular structure 211b along the waveguide 210 may be the same or different, and the radial dimensions of the annular structure 211b and the annular structure 211a along the waveguide may also be the same or different, which can be specifically designed according to actual needs and will not be repeated here.

[0074] Fig.13 for Figure 3 Another schematic diagram of the feed assembly 200 at section AA is shown in FIG. Fig.13 FIG. 2 shows another case where the inner wall of the waveguide 210 includes a plurality of annular structures 211. In this embodiment, the plurality of annular structures 211 may all be annular grooves. The number, radial size, length, arrangement, and location of the plurality of annular structures 211 in the waveguide 210 may all be referred to in the foregoing Figures 4 to 12 The embodiment shown is designed and will not be repeated here. Fig.13 FIG. 2 only exemplarily shows a situation in which the radial dimensions of the plurality of annular structures 211 along the waveguide 210 increase sequentially, that is, the depths of the annular structure a, the annular structure b, and the annular structure c increase sequentially.

[0075] Fig.14 for Figure 3 Another schematic diagram of the feed assembly 200 at section AA is shown in FIG. Fig.14 FIG. 2 shows another case where the inner wall of the waveguide 210 includes a plurality of annular structures 211. In this embodiment, the plurality of annular structures 211 may include at least one annular protrusion and at least one annular groove. Fig.14 The three annular structures 211 shown in the figure include two annular protrusions and one annular groove. Exemplarily, the annular protrusions and the annular grooves may be arranged alternately along the axial direction of the waveguide 210. Alternatively, at least one annular protrusion is arranged adjacent to each other, and at least one annular groove is arranged adjacent to each other. In this case, the annular protrusion may be located on the side of the annular groove facing the first end of the waveguide, or on the side of the annular groove facing the second end of the waveguide.

[0076] exist Fig.14 In the embodiment shown, the number, radial size, length, arrangement and location of the plurality of annular structures 211 in the waveguide 210 can all refer to the aforementioned Figures 4 to 12 The embodiment shown is designed and will not be repeated here.

[0077] In addition, Figures 5 to 14 In any of the embodiments shown, the medium 220 of the feed assembly 200 may be Figure 3The medium 220 in the embodiment shown has the same structure, or some changes may be made to the structure of the medium 220, such as increasing or decreasing the number of cylinders in the medium 220, changing the size of the cylinders, etc., so that the feed assembly 200 obtains a better impedance matching effect.

[0078] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A feed assembly, characterized in that: It includes a waveguide, a medium and a sub-reflection surface, wherein: The waveguide comprises a first end and a second end, the inner wall of the waveguide comprises one or more annular structures arranged near the first end, the one or more annular structures are arranged in sequence from the first end to the second end, and the axis of each annular structure extends along the axial direction of the waveguide; One end of the medium is inserted into the waveguide from the first end; The sub-reflecting surface is fixed to an end of the medium away from the waveguide.

2. The feed assembly according to claim 1, characterized in that: Along the direction from the first end to the second end, an end portion of the first annular structure facing the first end is located in the same plane as the first end.

3. The feed assembly according to claim 1 or 2, characterized in that: There are multiple annular structures, and an end portion of at least one annular structure facing the first end and an end portion of another adjacent annular structure facing the second end are located in the same plane.

4. The feed assembly according to any one of claims 1 to 3, characterized in that: There are multiple annular structures, and at least one annular structure is spaced apart from another adjacent annular structure.

5. The feed assembly according to any one of claims 1 to 4, characterized in that: There are multiple annular structures, and at least two of the annular structures have the same length.

6. The feed assembly according to any one of claims 1 to 5, characterized in that: There are multiple annular structures, and at least two of the annular structures have different lengths.

7. The feed assembly according to any one of claims 1 to 6, characterized in that: There are multiple annular structures, and the sizes of the multiple annular structures along the radial direction of the waveguide are different.

8. The feed assembly according to claim 7, characterized in that: Along the direction from the first end to the second end, the sizes of the plurality of annular structures along the radial direction of the waveguide decrease in sequence.

9. The feed assembly according to claim 7, characterized in that: Along the direction from the first end to the second end, the radial dimensions of the plurality of annular structures increase sequentially.

10. The feed assembly according to any one of claims 1 to 6, characterized in that: There are multiple annular structures, and a radial dimension of at least one of the annular structures along the waveguide is larger than radial dimensions of two adjacent annular structures along the waveguide; or, A dimension of at least one of the annular structures along the radial direction of the waveguide is smaller than dimensions of two adjacent annular structures along the radial direction of the waveguide.

11. The feed assembly according to claim 10, characterized in that: The sizes of two adjacent annular structures of at least one annular structure along the radial direction of the waveguide are the same.

12. The feed assembly according to claim 10, characterized in that: At least one of the annular structures has two adjacent annular structures with different sizes along the radial direction of the waveguide.

13. The feed assembly according to any one of claims 1 to 6, characterized in that: There are multiple annular structures, at least two of which have the same size in the radial direction of the waveguide, and the two annular structures having the same size in the radial direction of the waveguide are arranged at intervals.

14. The feed assembly according to any one of claims 1 to 13, characterized in that: Any one of the one or more annular structures is an annular protrusion or an annular groove.

15. An antenna, characterized in that: It comprises a main reflecting surface and a feed assembly as described in any one of claims 1 to 14, wherein the second end of the waveguide passes through the main reflecting surface.

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