A high-gain large-uniform-field-area C-band high-power conical horn antenna

Abstract

The application discloses a high-gain large-uniform-field C-band high-power conical horn antenna, wherein a feeding coaxial waveguide comprises a coaxial inner conductor and a coaxial outer conductor; the coaxial inner conductor is in the shape of a cylinder, and a head cone of the coaxial inner conductor is in the shape of a truncated cone; one end of the head cone of the coaxial inner conductor is connected with the coaxial inner conductor and is consistent with the radius of the coaxial inner conductor, the radius of the other end gradually decreases, and the head cone of the coaxial inner conductor is provided with round chamfers at both ends of a side end face of the truncated cone; the coaxial outer conductor is in the shape of a horn, the first outer conductor gradual change section and the second outer conductor gradual change section are different in opening angle; the head cone of the coaxial inner conductor is located in the first outer conductor gradual change section and is coaxial with the first outer conductor gradual change section; one end of the second outer conductor gradual change section is connected with the first outer conductor gradual change section, the other end is provided with a mouth face flange, and a sealing plate is connected with the mouth face flange. The application has the advantages of high conversion efficiency, simple structure, high gain, large uniform field, small gain fluctuation and the like.

Description

Technical Field

[0001] This invention relates to the field of high-power radiating antennas, and more particularly to a high-gain, large uniform field C-band high-power conical horn antenna. Background Technology

[0002] In recent years, the importance of high-power environmental effects has become increasingly prominent. When electronic products operate in complex electromagnetic environments, they may face high-power environments exceeding 200V / m. Therefore, it is necessary to conduct adaptability assessments of electronic products under high-power environments, and generating a uniform high-power environment is a prerequisite for conducting such assessments. When the device under test (EUT) is large in size, a large field uniformity region is required to allow the EUT to be tested under uniform field irradiation, which is beneficial for the electromagnetic tolerance analysis of the EUT. One effective way to improve field uniformity is to reduce the transmitting antenna gain. However, reducing the transmitting antenna gain will reduce the electric field strength and power density in the far-field region where the EUT is located. Under the same conditions, the transmitting power of the source needs to be increased, increasing the system cost. For conical horn antennas used for high-power environmental irradiation, the following requirements must be met simultaneously: a large uniform field region to meet the requirements of large-sized EUTs; high gain to allow for greater radiation distance with the same source power; and minimal fluctuation in power gain within the uniform field region.

[0003] This invention proposes a high-gain, large-uniform-field C-band high-power conical horn antenna, comprising a feed coaxial waveguide, a coaxial inner conductor head cone, a first outer conductor tapered section, a second outer conductor tapered section, an aperture flange, and a sealing plate. This invention solves the problems of small far-field uniform region, low transmit gain, and large gain fluctuations in the field uniform region of the transmitting antenna. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-gain, large uniform field area C-band high-power conical horn antenna that addresses the deficiencies in the prior art.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] This invention provides a high-gain, large-uniform-field C-band high-power conical horn antenna, comprising a feed coaxial waveguide, the feed coaxial waveguide including a coaxial inner conductor and a coaxial outer conductor, one end of the coaxial inner conductor having a coaxial inner conductor head cone; the coaxial outer conductor including a first outer conductor taper section and a second outer conductor taper section; wherein:

[0007] The inner conductor of the coaxial conductor is cylindrical in shape, and the head cone of the inner conductor is truncated cone in shape. One end of the head cone of the inner conductor is connected to the inner conductor and has the same radius as the inner conductor. The radius of the other end gradually decreases, and the head cone of the inner conductor has rounded chamfers at both ends of the truncated cone side face.

[0008] The coaxial outer conductor is horn-shaped, and the first and second outer conductor transition sections have different angles. The coaxial inner conductor head cone is located inside the first outer conductor transition section and is coaxial with the first outer conductor transition section. One end of the second outer conductor transition section is connected to the first outer conductor transition section, and the other end is provided with an opening flange, through which a sealing plate is connected.

[0009] Furthermore, the radius of the truncated cone top of the coaxial inner conductor head cone of the present invention is 0.055. λ mm, with a base radius of 0.234. λ mm, the gradient length of the side end face is 0.179 mm. λ mm.

[0010] Furthermore, the radius of the chamfer at the gradient starting position of the frustum-shaped end face of the coaxial inner conductor head cone of the present invention is 0.143. λ mm, the radius of the chamfer at the gradient termination position is 0.043 mm. λ mm.

[0011] Furthermore, the coaxial inner conductor portion of the present invention is located within the first outer conductor transition section, and the coaxial inner conductor and the coaxial inner conductor head cone located within the first outer conductor transition section have a total length of 0.33. λ mm.

[0012] Furthermore, the radius of one end of the first outer conductor gradient section of the present invention is 0.545. λ mm, the radius of the other end is 1.723 mm. λ mm, length 2.219 λ mm, angle 27.96°.

[0013] Furthermore, the radius of one end of the second outer conductor gradient section of the present invention is 1.723. λ mm, the radius of the other end is 3.755 mm. λ mm, length 2.58 λ mm, angle 38.23°.

[0014] Furthermore, the coaxial outer conductor of the present invention also includes an outer conductor starting segment, which is connected to the first outer conductor transition segment. The outer conductor starting segment is a hollow cylinder, and the coaxial inner conductor is coaxial with the outer conductor starting segment.

[0015] Furthermore, the sealing plate of the present invention is made of a thickness of 0.595 mm. λ mm, radius 4.185 λ Made of 1 mm thick polytetrafluoroethylene sheet.

[0016] The beneficial effects of this invention are:

[0017] This invention proposes a high-gain, large-uniform-field C-band high-power conical horn antenna. Its advantages lie in the use of a tapered inner conductor head cone structure and a tapered outer conductor structure, enabling phase adjustment within a short range and achieving microwave phase equalization within the antenna, resulting in a transmission efficiency approaching 100%. The use of a PTFE sealing plate allows for high-power electromagnetic wave transmission. In the far-field ±6.5° range, the antenna gain fluctuation is less than 0.3dB, exhibiting high-gain transmission while simultaneously satisfying the characteristics of a large uniform-field microwave region and low far-field gain fluctuation. This invention has a clear principle, innovative method, and strong engineering applicability. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0019] Figure 1 This is a three-dimensional cross-sectional view of the high-gain, large uniform field region C-band high-power conical horn antenna of the present invention.

[0020] Figure 2 This is a schematic diagram of the high-gain, large uniform field region C-band high-power conical horn antenna structure of the present invention.

[0021] Figure 3 This is an enlarged schematic diagram of the coaxial inner conductor of the present invention.

[0022] In the figure: 1. Coaxial inner conductor; 1-1. Coaxial inner conductor head cone; 2. Coaxial outer conductor; 2-1. First outer conductor transition section; 2-2. Second outer conductor transition section; 203. Outer conductor starting section; 3. Sealing plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] Example 1

[0025] The high-gain, large uniform field C-band high-power conical horn antenna of this invention includes a feed coaxial waveguide, which comprises an inner coaxial conductor 1 and an outer coaxial conductor 2. One end of the inner coaxial conductor 1 is provided with a coaxial inner conductor head cone 1-1. The outer coaxial conductor 2 includes a first outer conductor tapered section 2-1 and a second outer conductor tapered section 2-2.

[0026] The inner conductor 1 of the coaxial conductor is cylindrical in shape, and the head cone 1-1 of the coaxial conductor is truncated cone in shape. One end of the head cone 1-1 of the coaxial conductor is connected to the inner conductor 1 of the coaxial conductor and has the same radius as the inner conductor 1 of the coaxial conductor. The radius of the other end gradually decreases, and the head cone 1-1 of the coaxial conductor has rounded chamfers at both ends of the truncated cone side end face.

[0027] The coaxial outer conductor 2 is horn-shaped, and the first outer conductor transition section 2-1 and the second outer conductor transition section 2-2 have different angles. The coaxial inner conductor head cone 1-1 is located inside the first outer conductor transition section 2-1 and is coaxial with the first outer conductor transition section 2-1. One end of the second outer conductor transition section 2-2 is connected to the first outer conductor transition section 2-1, and the other end is provided with an opening flange, through which a sealing plate 3 is connected.

[0028] The coaxial outer conductor 2 also includes an outer conductor starting segment 2-3, which is connected to the first outer conductor transition segment 2-1. The outer conductor starting segment 2-3 is a hollow cylinder, and the coaxial inner conductor 1 is coaxial with the outer conductor starting segment 2-3.

[0029] Example 2

[0030] The high-gain, large uniform field C-band high-power conical horn antenna of this invention includes:

[0031] (1) Key technologies include the inner conductor head cone design and the outer conductor gradient design of the coaxial waveguide. By using the coaxially fed linear polarization TE11 mode, the phase is adjusted under the action of the inner conductor head cone gradient and the outer conductor gradient section, thereby achieving field homogenization inside the antenna. After reaching the antenna aperture, the uniform region of the far field of the transmitting field is still maintained within a certain range.

[0032] (2) Design of the inner conductor head cone of the feed coaxial waveguide: The inner conductor head cone of the feed coaxial waveguide is a frustum-shaped cone. The top of the frustum gradually tapers to a radius of 0.055λmm, with a taper length of 0.179λmm, and the bottom radius of the frustum is 0.234λmm. The inner conductor and the inner conductor head cone extend 0.33λmm into the tapered section of the first outer conductor. The inner conductor head cone has a rounded corner of 0.143λmm at the beginning and 0.043λmm at the end. Figure 3 As shown.

[0033] (3) Gradual design of the outer conductor of the feed coaxial waveguide: The gradual transition section of the outer conductor of the feed coaxial waveguide is divided into two segments. The first segment has an initial outer conductor radius of 0.545λmm, an end outer conductor radius of 1.723λmm, a length of 2.219λmm, and a slant angle of 27.96°; the second segment has an initial outer conductor radius of 1.723λmm, an end outer conductor radius of 3.755λmm, a length of 2.58λmm, and a slant angle of 38.23°.

[0034] Example 3

[0035] The high-gain, large uniform field C-band high-power conical horn antenna of this invention, such as... Figure 1As shown, it consists of a feed coaxial waveguide, a coaxial inner conductor head cone, a first outer conductor taper section, a second outer conductor taper section, an aperture flange, and a sealing plate. Among these,

[0036] The feed coaxial waveguide consists of inner and outer coaxial conductors. Its input impedance matches the microwave source's output impedance. One end of the inner coaxial conductor's cone is connected to the inner conductor of the feed coaxial waveguide, and its radius matches that of the inner conductor. The radius of the other end of the inner coaxial conductor's cone gradually decreases before chamfering at the transition point. The inner coaxial conductor's cone is located within the first outer conductor's transition section and is coaxial with it. One end of the second outer conductor's transition section is connected to the first outer conductor's transition section, and the other end is connected to the flange. A sealing plate is connected to the other side of the flange.

[0037] Furthermore, a feed coaxial waveguide is designed. For example... Figure 2 As shown, the feed coaxial waveguide consists of an outer conductor with a radius of R0 = 0.545λmm and an inner conductor with a radius of r0 = 0.234λmm. The inner conductor's tip is a truncated cone, with the top of the cone gradually tapering to a radius of 0.055λmm and a tapering length of 0.179λmm. The bottom of the cone has a radius of 0.234λmm. The inner conductor and its tip extend 0.33λmm into the tapered section of the first outer conductor. The inner conductor tip has a rounded corner of 0.143λmm at the beginning and 0.043λmm at the end of the tapering.

[0038] Further design of the feed coaxial waveguide outer conductor. The first outer conductor gradient section has an initial outer conductor radius of 0.545λmm, an end outer conductor radius of 1.723λmm, a length of 2.219λmm, and a slant angle of 27.96°; the second outer conductor gradient section has an initial outer conductor radius of 1.723λmm, an end outer conductor radius of 3.755λmm, a length of 2.58λmm, and a slant angle of 38.23°.

[0039] The sealing plate is made of polytetrafluoroethylene sheet with a thickness of a1 = 0.595λ mm and a radius of R1 = 4.185λ mm.

[0040] By using a coaxially fed linearly polarized TE11 mode, the phase is adjusted under the action of the inner conductor taper, the first outer conductor taper segment, and the second outer conductor taper segment, achieving field homogenization inside the antenna. Even after reaching the antenna aperture, the uniform region in the far-field region of the transmitted field remains within a certain range. Compared with existing technologies, due to the use of the inner conductor taper and outer conductor taper structures, phase adjustment can be achieved within a shorter range, realizing microwave phase equalization inside the antenna, and the transmission efficiency can reach nearly 100%. The use of a PTFE sealing plate enables high-power electromagnetic wave transmission, with antenna gain fluctuations of less than 0.3dB within a far-field range of ±6.5°.

[0041] In summary, the high-gain, large uniform field C-band high-power conical horn antenna of the present invention possesses high-gain transmission while simultaneously meeting the characteristics of a large uniform field microwave field and low far-field gain fluctuation. It has broad application prospects in high-power electromagnetic environment tolerance testing, high-power electromagnetic wave transmission uniform field construction, and high-power environmental effect testing.

[0042] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A high-gain, large uniform field C-band high-power conical horn antenna, characterized in that, The system includes a feed coaxial waveguide, which comprises an inner coaxial conductor (1) and an outer coaxial conductor (2). One end of the inner coaxial conductor (1) is provided with an inner coaxial conductor head cone (1-1). The outer coaxial conductor (2) comprises a first outer conductor transition section (2-1) and a second outer conductor transition section (2-2). The inner conductor (1) of the coaxial conductor is cylindrical in shape, and the head cone (1-1) of the inner conductor of the coaxial conductor is truncated cone in shape. One end of the head cone (1-1) of the inner conductor of the coaxial conductor is connected to the inner conductor (1) and has the same radius as the inner conductor (1). The radius of the other end gradually decreases, and the head cone (1-1) of the inner conductor of the coaxial conductor has rounded chamfers at both ends of the side face of the truncated cone. The coaxial outer conductor (2) is horn-shaped, and the first outer conductor transition section (2-1) and the second outer conductor transition section (2-2) have different opening angles; the coaxial inner conductor head cone (1-1) is located inside the first outer conductor transition section (2-1) and is coaxial with the first outer conductor transition section (2-1); one end of the second outer conductor transition section (2-2) is connected to the first outer conductor transition section (2-1), and the other end is provided with an opening flange, and a sealing plate (3) is connected through the opening flange; The top radius of the truncated cone of the coaxial inner conductor head cone (1-1) is 0.055λmm, the bottom radius is 0.234λmm, and the gradient length of the side end face is 0.179λmm; where λ is the operating wavelength of the horn antenna. The first outer conductor transition segment (2-1) has a radius of 0.545λmm at one end and a radius of 1.723λmm at the other end, a length of 2.219λmm, and an angle of 27.96°. The second outer conductor transition section (2-2) has a radius of 1.723λmm at one end and a radius of 3.755λmm at the other end, a length of 2.58λmm, and an angle of 38.23°.

2. The high-gain, large uniform field C-band high-power conical horn antenna according to claim 1, characterized in that, The radius of the chamfer at the beginning of the transition of the frustum-shaped end face of the coaxial inner conductor head cone (1-1) is 0.143λmm, and the radius of the chamfer at the end of the transition is 0.043λmm.

3. The high-gain, large uniform field C-band high-power conical horn antenna according to claim 1, characterized in that, The coaxial inner conductor (1) is located within the first outer conductor transition section (2-1), and the coaxial inner conductor (1) and the coaxial inner conductor head cone (1-1) located within the first outer conductor transition section (2-1) have a total length of 0.33λmm.

4. The high-gain, large uniform field C-band high-power conical horn antenna according to claim 1, characterized in that, The coaxial outer conductor (2) also includes an outer conductor starting segment (2-3), which is connected to the first outer conductor transition segment (2-1). The outer conductor starting segment (2-3) is a hollow cylinder, and the coaxial inner conductor (1) is coaxial with the outer conductor starting segment (2-3).

5. The high-gain, large uniform field C-band high-power conical horn antenna according to claim 1, characterized in that, The sealing plate (3) is made of polytetrafluoroethylene plate with a thickness of 0.595λmm and a radius of 4.185λmm.

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