A horn antenna

Abstract

The embodiment of the present application provides a horn antenna, and relates to the field of antennas.The horn antenna comprises an antenna body, the antenna body is in the shape of a horn, and the inner side radius of the antenna body and the axial position satisfy an exponential gradient function relationship, and a plurality of ring platforms are arranged at the outer periphery of the antenna body and are spaced apart along the axial direction of the antenna body.The horn antenna provided by the present application has the excellent radiation performance of the conventional inner wave corrugated horn antenna, such as beam equalization, low sidelobe and low cross polarization, but is easier to process at low cost, and can also avoid the breakdown problem between the inner wave corrugated walls of the conventional corrugated horn antenna when high-power microwave radiation occurs, so that the electromagnetic wave radiation capacity is improved.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and more specifically, to a horn antenna. Background Technology

[0002] Horn antennas come in various forms, such as fan-shaped horn antennas, pyramidal horn antennas, and conical horn antennas. They are commonly used as signal transceiver antennas, standard gain antennas, and reflector antenna feeds, and are widely used in fields such as communications, radar, and testing.

[0003] To achieve superior performance such as beam equalization, low sidelobes, and low cross-polarization, existing technologies will set corrugated grooves on the inner wall of the conical horn antenna to form an inner corrugated horn antenna.

[0004] However, the existing internal corrugated horn antennas have corrugated grooves inside the horn antenna, which is difficult and costly to manufacture. Most importantly, when used for high-power microwave radiation, breakdown can occur between the metal walls on both sides of the corrugated grooves, degrading the antenna's radiation performance. Summary of the Invention

[0005] The present invention aims to provide a horn antenna that possesses the excellent radiation performance of traditional internal corrugated horn antennas, such as beam equalization, low sidelobes, and low cross-polarization. It is also easier to manufacture with low cost and can avoid the problem of inter-wall breakdown of the internal corrugation of traditional corrugated horn antennas when radiating high-power microwaves, thereby improving electromagnetic wave radiation capability.

[0006] The embodiments of the present invention can be implemented as follows: This application provides a horn antenna, including an antenna body. The antenna body is horn-shaped, and the inner radius of the antenna body and the axial position satisfy an exponentially changing functional relationship. Multiple rings are arranged at intervals along the axial direction of the antenna body on its outer periphery.

[0007] In an optional embodiment, one end of the antenna body is a feed end, and the other end is an aperture end. In a coordinate system with the intersection of the axis of the antenna body and the end face of the feed end as the origin, the axis of the antenna body as the Z-axis, and the radius of the antenna body as the X-axis, the inner radius X of the antenna body and the axial position Z satisfy the following exponentially varying functional relationship:

[0008]

[0009]

[0010] Where a and c are both constants; e is the natural constant; r b r is the inner radius of the feed end. tL is the inner radius of the aperture end; L is the axial length of the antenna body.

[0011] In an optional implementation, the value of 'a' ranges from 2mm to 8mm. And / or, The axial length of the antenna body is between 270mm and 330mm. And / or, The inner radius r of the aperture end t The value range is 130mm-170mm; and / or; The inner radius r of the feed end b The value corresponds to the dimension of one end of the circular waveguide of the waveguide conversion connector used for power supply.

[0012] In an optional embodiment, the end face of the annulus near the aperture end is aligned with the end face of the aperture end.

[0013] In an optional embodiment, all the ring platforms are equally spaced along the axial direction of the antenna body, and the spacing ranges from 12mm to 17mm.

[0014] In an optional embodiment, all the rings have the same radial convex height on the antenna body, and the value ranges from 20mm to 30mm.

[0015] In an optional embodiment, all of the rings have the same thickness along the axial direction of the antenna body.

[0016] In an optional implementation, the antenna body has a uniform wall thickness, ranging from 2mm to 3mm.

[0017] In an optional implementation, the value of a is 5 mm; r b The value is 48.935 mm, r t The value of L is 150mm, the value of L is 300mm, the wall thickness of the antenna body is 2.5mm, the thickness of the ring platform is 2.5mm, the radial outward convex height of all the ring platforms on the antenna body is 25mm, and the axial spacing between any two adjacent ring platforms on the antenna body is 14.5mm.

[0018] In an optional embodiment, the horn antenna further includes a connecting flange, which positions the antenna body on one side of the feed end and is used to connect a waveguide conversion connector.

[0019] The beneficial effects of the horn antenna provided in this embodiment of the invention include: This application designs the antenna body in a horn shape, with the inner radius and axial position of the antenna body satisfying an exponentially varying functional relationship. Multiple annular truncated platforms are spaced at intervals along the axial direction of the antenna body's outer periphery. This creates troughs between adjacent platforms and peaks at corresponding platform positions, thus forming an externally corrugated horn antenna. This achieves the superior radiation performance of a conventional corrugated conical horn antenna while, because the platforms are located on the outer periphery, they can be integrally milled without complex machining tools, resulting in lower manufacturing difficulty and cost. Most importantly, the horn antenna provided by this application can also improve the problem of inter-wall breakdown in corrugated metal during high-power microwave radiation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the horn antenna provided in this embodiment from a first-view perspective; Figure 2 This is a schematic diagram of the horn antenna provided in this embodiment from a second perspective. Figure 3 This is a schematic diagram of the horn antenna from a third-view perspective provided in this embodiment; Figure 4 This is a schematic diagram of the xoz plane structure of the horn antenna provided in this embodiment; Figure 5 This is a schematic diagram of the yoz plane structure of the horn antenna provided in this embodiment; Figure 6 The radiation pattern of the horn antenna provided in this embodiment at 2.1 GHz; Figure 7 The radiation pattern of the horn antenna provided in this embodiment at 2.45 GHz; Figure 8 The radiation pattern of the horn antenna provided in this embodiment at 2.8 GHz; Figure 9 This is a sidelobe level diagram of the horn antenna provided in this embodiment; Figure 10 This is a front-to-back comparison diagram of the horn antenna provided in this embodiment; Figure 11 This is a cross-polarization level diagram of the main radiation direction of the horn antenna provided in this embodiment; Figure 12This is a simulation diagram of the electric field distribution of the horn antenna in the xoz orthogonal plane provided in this embodiment; Figure 13 This is a simulation diagram of the electric field distribution of the horn antenna in the yoz orthogonal plane provided in this embodiment; Figure 14 The radiation pattern of a traditional conical horn antenna at 2.45 GHz; Figure 15 The radiation pattern of a conventional exponentially graded conical horn antenna at 2.45 GHz; Figure 16 The diagram shows the sidelobe levels of a traditional conical horn antenna. Figure 17 The sidelobe level diagram of a traditional exponentially graded conical horn antenna; Figure 18 This is a front-to-back comparison diagram of a traditional conical horn antenna. Figure 19 This is a front-to-back comparison diagram of a traditional exponentially graded conical horn antenna. Figure 20 This is a cross-polarization level diagram of the main radiation direction of a traditional conical horn antenna. Figure 21 The diagram shows the cross-polarization level of the main radiation direction of a traditional exponentially graded conical horn antenna. Figure 22 The electric field simulation distribution of a traditional internal corrugated horn antenna in the xoz orthogonal plane is shown. Figure 23 This is a simulation diagram of the electric field distribution of a traditional internal corrugated horn antenna in the yoz orthogonal plane.

[0022] Icons: 100-Horn antenna; 110-Antenna body; 111-Feed end; 113-Aperture end; 130-Ring platform; 150-Connecting flange. Detailed Implementation

[0023] The existing conical corrugated horn antenna has corrugated grooves inside the horn antenna, which is difficult to manufacture and costly. Moreover, when used for high-power microwave radiation, breakdown occurs between the metal walls on both sides of the corrugated grooves, which degrades the antenna's radiation performance.

[0024] To address the aforementioned problems, this invention provides a horn antenna that possesses the excellent radiation performance of traditional internal corrugated horn antennas, such as beam equalization, low sidelobes, and low cross-polarization. It is also easier to manufacture at a low cost and can avoid the problem of inter-wall breakdown of the internal corrugations in traditional corrugated horn antennas during high-power microwave radiation, thereby improving electromagnetic wave radiation capability.

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention 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 invention.

[0029] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0030] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0031] The following describes in detail the overall structure, working principle, and technical effects of the horn antenna 100 provided by the present invention through embodiments and in conjunction with the accompanying drawings.

[0032] Please refer to Figure 1 , Figure 2 and Figure 3 This embodiment provides a horn antenna 100, which can be applied to fields such as communication, radar and electromagnetic testing.

[0033] Please refer to Figure 1 , Figure 2 and Figure 3In this embodiment, the horn antenna 100 includes an antenna body 110, which is horn-shaped. The inner radius of the antenna body 110 and the axial position satisfy an exponentially changing functional relationship. Multiple ring platforms 130 are provided at intervals along the axial direction of the antenna body 110 on the outer periphery of the antenna body 110.

[0034] In this embodiment, the antenna body 110 is configured in a horn shape, and the inner radius of the antenna body 110 satisfies an exponentially varying functional relationship with its axial position. Multiple annular tiers 130 are spaced at intervals along the axial direction of the antenna body 110, forming troughs between adjacent tiers 130 and peaks at corresponding positions. This creates an outer corrugated horn antenna 100. This configuration allows the horn antenna 100 to achieve the superior radiation performance of a traditional inner corrugated horn antenna. Furthermore, because the annular tiers 130 are located on the outer periphery, they can be integrally formed by milling without the need for complex machining tools, resulting in lower manufacturing difficulty and cost. Most importantly, the horn antenna provided in this embodiment can also improve the problem of inter-wall breakdown of corrugated metal during high-power microwave radiation compared to traditional inner corrugated horn antennas.

[0035] Specifically, the improvement in radiation performance is reflected in: Better impedance matching: The inner radius and axial position of the antenna body 110 satisfy an exponentially varying functional relationship, enabling the feed port impedance to be smoothly matched to the horn aperture surface impedance segment by segment. Compared with a conical horn antenna, this exponentially varying structure can more effectively reduce the impedance discontinuity between the waveguide and free space, thereby reducing electromagnetic wave reflection and allowing more energy to be radiated into free space, thus improving radiation efficiency.

[0036] Wider bandwidth: The exponentially graded structure increases the number of resonant modes of the antenna, thus expanding its bandwidth. In contrast, the bandwidth of a conical horn antenna is relatively narrow. This broadband characteristic allows the antenna to operate over a wider frequency range while maintaining good radiation performance.

[0037] Lower sidelobe and cross-polarization levels: Multiple ring-shaped platforms 130 are spaced axially along the outer periphery of the antenna body 110, similar to the structure of a corrugated horn antenna. These ring-shaped platforms 130 can achieve extremely low sidelobe and cross-polarization levels within the antenna bandwidth, making the radiated energy of the antenna more concentrated in the main lobe direction and reducing energy leakage in the sidelobe direction, thereby improving the antenna's radiation performance and anti-interference capability.

[0038] Better beam equalization characteristics: Under the combined action of the antenna body 110 and the multiple ring platforms 130 spaced along the outer periphery along the axis, the radiation pattern has the same beamwidth in all planes along its axis, demonstrating good beam equalization characteristics.

[0039] More uniform electric field distribution: The horn antenna 100 provided in this embodiment has advantages in homogenizing the aperture field, reducing the electric field intensity at the antenna aperture and making the electric field distribution more uniform. During high-power microwave radiation, a uniform distribution of electric field intensity can reduce the occurrence of excessively high local electric field intensity, thereby reducing the possibility of inter-wall breakdown.

[0040] Increased power capacity: A larger aperture radius to wavelength ratio helps to withstand higher microwave power without breakdown, thereby improving the problem of inter-wall breakdown in corrugated structures.

[0041] Please refer to Figures 1 to 5 In this embodiment, one end of the antenna body 110 is a feed end 111, and the other end is an aperture end 113. In a coordinate system with the intersection of the axis of the antenna body 110 and the end face of the feed end 111 as the origin, the axis of the antenna body 110 as the Z-axis, and the radius of the antenna body 110 as the X-axis, the inner radius X of the antenna body 110 and the axial position Z satisfy the following exponentially varying functional relationship:

[0042]

[0043]

[0044] Where a and c are both constants; r b r is the inner radius of the feed end 111. t L is the inner radius of the aperture end 113; L is the axial length of the antenna body 110.

[0045] Please refer to Figures 1 to 5 In this embodiment, optimizing the profile of the antenna body 110 using the aforementioned gradient exponential function can yield better radiation performance, such as good impedance matching, wider blocking bandwidth, lower sidelobe level, lower cross-polarization level, and better beam equalization performance.

[0046] Specifically, a and c are adjustable parameters that can adjust the curvature of the exponential gradient line. The inner radius r of the feed end 111... b The value corresponds to the dimension of one end of the circular waveguide in the waveguide conversion connector used for power supply. The minimum value of c is r. b Subtract the maximum value of 'a'. The maximum value of 'c' is r. b Subtracting the minimum value of a gives the maximum value of c.

[0047] In this embodiment, the value of a ranges from 2mm to 8mm.

[0048] In this embodiment, the value of a is set to a range of 2mm-8mm, which allows for better adjustment of the curvature of the antenna body 110 outline, thereby improving the antenna's radiation performance.

[0049] Please refer to Figures 1 to 5 In this embodiment, the axial length L of the antenna body 110 is between 270mm and 330mm. The inner radius r of the aperture end 113... t The value range is 130mm-170mm. The wall thickness of the antenna body 110 is the same, and the value range of the wall thickness t1 is 2mm-3mm.

[0050] The radiation performance of the horn antenna 100 can be improved by setting the above values.

[0051] In this embodiment, the end face of the ring 130 near the aperture end 113 is aligned with the end face of the aperture end 113. All the rings 130 are equally spaced along the axial direction of the antenna body 110, with a spacing of d. t The value range is 12mm-17mm. All ring-shaped units 130 have the same radial convex height on the antenna body 110, and the convex height l... t The value range is 20mm-30mm. The thickness t1 of all rings 130 along the axial direction of the antenna body 110 is the same.

[0052] This embodiment can improve the radiation performance of the antenna by optimizing the above-mentioned value range of the ring platform 130.

[0053] Please refer to Figures 1 to 5 In this embodiment, the horn antenna 100 also includes a connecting flange 150. The connecting flange 150 is used to connect the antenna body 110 to one side of the feed end 111 and is used to connect the waveguide conversion connector.

[0054] This embodiment integrates the connecting flange 150 with the antenna body 110, making it easier to manufacture and assemble.

[0055] Please refer to Figures 1 to 13 In one set of embodiments, with the target operating frequency band of 2.1GHz-2.8GHz, a set of values ​​was obtained through simulation optimization: the value of a is 5mm; r b The value is 48.935 mm, r t The value of L is 150mm, the value of L is 300mm, the wall thickness of the antenna body 110 is 2.5mm, the thickness of the ring platform 130 is 2.5mm, the radial convex height of all ring platforms 130 in the antenna body 110 is 25mm, and the axial spacing between any two adjacent ring platforms 130 in the antenna body 110 is 14.5mm.

[0056] This embodiment optimizes the above-mentioned values ​​to achieve better operating performance within the target frequency range.

[0057] Specifically, r b The value can be determined based on the size of the feed coaxial line-circular waveguide converter used.

[0058] The horn antenna 100 provided in this embodiment, combined with an existing compatible coaxial-to-circular waveguide converter, constitutes a directly usable horn antenna 100. According to the theory of the horn antenna 100, as long as the converter (TE...) 11 The mode of (mode) meets the needs of this embodiment, and the matching between the two can meet the actual needs. Taking Hengda Microwave's coaxial circular waveguide converter as an example, its nominal operating frequency range is 2.1-2.8GHz.

[0059] Please refer to Figure 6 , Figure 7 and Figure 8 , Figure 6 , Figure 7 and Figure 8 The radiation patterns of the horn antenna 100 provided in this embodiment at three frequency points of 2.1 GHz, 2.45 GHz, and 2.8 GHz, with Phi values ​​of 0°, 30°, 60°, 90°, 120°, and 150° respectively (the coordinate system used is...). Figure 4 and Figure 5 (using the coordinate system in the image), it can be seen that the 3dB beamwidth of the radiation patterns in different Phi planes at the three frequency points is basically the same, indicating that the antenna has good beam equalization characteristics and can well meet the feeding requirements of the rotating parabolic antenna. Figure 9 and Figure 10 The sidelobe level diagram and front-to-back ratio diagram of the horn antenna 100 provided in this embodiment are given respectively. It can be seen that in the frequency range of 2.1-2.8GHz, the maximum sidelobe level of the antenna is -27.40dB and the minimum front-to-back ratio is 29.83dB, which shows that the antenna has good overall low sidelobe characteristics. Figure 11 The horn antenna 100 provided in this embodiment is shown in the main radiation direction ( Figure 4 and Figure 5 The cross-polarization level diagram (in the z+ direction) is derived from... Figure 11 It can be seen that the maximum cross-polarization level is -40.28dB in the frequency range of 2.1-2.8GHz, which demonstrates good cross-polarization characteristics. Figure 12 and Figure 13 The electric field distributions of the horn antenna 100 provided in this embodiment at a frequency of 2.45 GHz in the xoz and yoz planes are given respectively. Figure 12 and Figure 13It can be seen that the high-amplitude electric field is concentrated inside the horn. After directional radiation with low sidelobes and low cross-polarization, the electric field value in the outer ripple region is very small, making breakdown unlikely. Therefore, it can radiate high-power electromagnetic waves.

[0060] In a set of comparative examples, the feed end radius rb, aperture end radius rt, axial length L, and axial position and dimensions of the inner ring platform 130 of the traditional conical horn antenna, the exponentially tapered conical horn antenna, and the inner corrugated horn antenna were set to be basically the same as those of the horn antenna in this embodiment for simulation comparison. The specific comparison results are as follows: pass Figure 7 , Figure 14 and Figure 15 In comparison, it can be seen that the traditional conical horn antenna has the worst beam equalization characteristics, while the exponentially graded conical horn antenna has slightly better beam equalization characteristics. The horn antenna 100 provided in this embodiment has superior beam equalization characteristics.

[0061] Figure 16 and Figure 17 These represent the sidelobe levels of a traditional conical horn antenna and an exponentially graded conical horn antenna, respectively. They are compared to the sidelobe levels of the horn antenna 100 provided in this embodiment (e.g., Figure 9 As shown in the figure, by comparison, it can be seen that the horn antenna 100 provided in this embodiment has the lowest sidelobe level characteristics.

[0062] Figure 18 and Figure 19 The images show before-and-after comparisons of a traditional conical horn antenna and an exponentially graded conical horn antenna, respectively, and a comparison of the before-and-after comparison of the horn antenna provided in this embodiment (e.g., ...). Figure 10 As shown in the comparison, it can be seen that the horn antenna provided in this embodiment has the highest front-to-back ratio.

[0063] Figure 20 and Figure 21 The diagrams show the cross-polarization levels in the main radiation direction of a traditional conical horn antenna and an exponentially graded conical horn antenna, respectively, and the cross-polarization level diagram in the main radiation direction of the horn antenna 100 provided in this embodiment (e.g., ...). Figure 11 As shown in the figure, it can be seen that the horn antenna 100 provided in this embodiment has a slightly higher cross-polarization level at 2.1GHz, but the cross-polarization levels of the three are not much different at other frequencies.

[0064] Figure 22 and Figure 23 The figures show the electric field distribution diagrams of a conventional internally corrugated horn antenna in the xoz and yoz planes at 2.45 GHz, respectively, and the electric field distribution diagram of the horn antenna 100 provided in this embodiment. Figure 12 and Figure 13By comparison, it can be seen that the xoz plane is the E-plane of all horn antennas 100, and the electric field within this plane will form a strong distribution on the horn wall. Figure 12 , Figure 22 In this embodiment, the interior of the horn antenna 100 is a smooth metal surface, while the interior of a traditional internally corrugated horn antenna is a corrugated surface. Figure 22 It can be seen that a traditional internal corrugated horn antenna will form a bridging electric field between the metal walls on both sides of the corrugation. When radiating high-power electromagnetic waves, it is prone to breakdown, which affects the antenna's radiation performance.

[0065] In summary, this embodiment configures the antenna body 110 in a horn shape, ensuring that the inner radius and axial position of the antenna body 110 satisfy an exponentially varying functional relationship. Multiple annular tiers 130 are spaced at intervals along the axial direction of the antenna body 110's outer periphery. This creates troughs between adjacent annular tiers 130 and peaks at corresponding positions, thus forming an externally corrugated horn antenna 100. This achieves the superior radiation performance of a conventional corrugated conical horn antenna 100. Furthermore, because the annular tiers 130 are located on the outer periphery, they can be integrally formed by milling without requiring complex machining tools, resulting in lower processing difficulty and cost. Most importantly, the horn antenna 100 provided in this embodiment possesses the excellent radiation characteristics of a traditional internally corrugated horn antenna while mitigating the problem of metal wall breakdown on both sides of the corrugation when radiating high-power electromagnetic waves.

[0066] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A horn antenna, characterized in that, The antenna body (110) is horn-shaped, and the inner radius of the antenna body (110) and the axial position satisfy an exponentially changing functional relationship. The outer periphery of the antenna body (110) is provided with a plurality of ring platforms (130) at intervals along the axial direction of the antenna body (110). The antenna body (110) has two opposite ends, one of which is the feed end (111) and the other end is the aperture end (113). In a coordinate system with the intersection of the axis of the antenna body (110) and the end face of the feed end (111) as the origin, the axis of the antenna body (110) as the Z-axis, and the radius of the antenna body (110) as the X-axis, the inner radius X of the antenna body (110) and the axial position Z satisfy the following exponentially varying functional relationship: Where a and c are both constants; e is the natural constant; r b r is the inner radius of the feed end (111). t L is the inner radius of the aperture end (113); L is the axial length of the antenna body (110); All the ring platforms (130) have the same radial convex height on the antenna body (110), and the value ranges from 20mm to 30mm. The antenna body (110) has the same wall thickness, ranging from 2mm to 3mm.

2. The horn antenna according to claim 1, characterized in that, The value of 'a' ranges from 2mm to 8mm. And / or, The axial length of the antenna body (110) is between 270mm and 330mm; And / or, The inner radius r of the aperture end (113) t The value range is 130mm-170mm; and / or; The inner radius r of the feed end (111) b The value corresponds to the dimension of one end of the circular waveguide of the waveguide conversion connector used for power supply.

3. The horn antenna according to claim 1, characterized in that, The end face of the ring platform (130) near the aperture end (113) is aligned with the end face of the aperture end (113).

4. The horn antenna according to claim 1, characterized in that, All of the ring platforms (130) are arranged at equal intervals along the axial direction of the antenna body (110), and the interval ranges from 12mm to 17mm.

5. The horn antenna according to claim 1, characterized in that, All of the rings (130) have the same thickness along the axial direction of the antenna body (110), with a value ranging from 2mm to 3mm.

6. The horn antenna according to claim 1, characterized in that, The value of a is 5mm; r b The value is 48.935 mm, r t The value of L is 150mm, the value of L is 300mm, the wall thickness of the antenna body (110) is 2.5mm, the thickness of the ring platform (130) is 2.5mm, the radial outward convex height of all the ring platforms (130) on the antenna body (110) is 25mm, and the axial spacing between any two adjacent ring platforms (130) on the antenna body (110) is 14.5mm.

7. The horn antenna according to claim 1, characterized in that, The horn antenna also includes a connecting flange (150), which sets the antenna body (110) on one side of the feed end (111) and is used to connect a waveguide conversion connector.

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