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Broadband ridge sheet outward-extending four-ridge circular horn feed source antenna

A technology of horn feed and ridge slices, which is applied in the field of compact field feed antennas, can solve problems such as splitting of the main lobe of the pattern, asymmetry of the pattern, and narrowing of the pattern, so as to achieve stable beam width, improve standing wave performance, and reduce echo low loss effect

Active Publication Date: 2020-08-18
北京中测国宇科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional four-ridge horn antenna has a certain application space, but it has certain defects. Its pattern is asymmetric at high frequencies, and the beam width is unstable. It tends to narrow rapidly with the increase of frequency, which makes the antenna It does not meet the design requirements, and the high frequency is prone to splitting the main lobe of the pattern
Moreover, its high cross-polarization level affects the test accuracy, so it is necessary to improve and design the four-ridge horn

Method used

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  • Broadband ridge sheet outward-extending four-ridge circular horn feed source antenna
  • Broadband ridge sheet outward-extending four-ridge circular horn feed source antenna
  • Broadband ridge sheet outward-extending four-ridge circular horn feed source antenna

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] First determine the caliber and length of the horn. The mouth size is determined by the cut-off frequency. The mouth of a traditional four-ridge horn needs to be greater than half of the minimum operating frequency, so the diameter of the mouth should be greater than 25mm, and the final diameter of the horn should be 33-40mm. , the length of the corresponding antenna should be based on the principle of optimal horn design, and at the same time, the phase difference between the mouth and the face should be as small as possible, and the length of the horn should be 50-51.2mm.

[0028] According to the magnetic field integral equation method, the thickness of the four-ridge waveguide and the distance between the ridge waveguides are determined to be 1-1.2mm and 0.5-0.55mm respectively, and at the same time, a 45° chamfer is cut at the bottom...

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Abstract

The invention relates to a broadband ridge sheet outward-extending four-ridge circular horn feed source antenna, wherein horn walls and ridges both adopt specific curves and are matched with each other, and the broadband ridge sheet outward-extending four-ridge circular horn feed source antenna can effectively expand the working bandwidth, reduce the voltage standing-wave ratio and remarkably reduce the change of the beam width along with the frequency. The feed probes adopt the semi-rigid coaxial cables connected by two SMA connectors, the two feed probes are vertically installed and are respectively polarized to correspond to two mutually vertical directions of a feed source, and the size of the extending part of each feed probe is processed due to the fact that the distance between ridges is smaller. Meanwhile, the terminal of a ridge curve extends outwards by a specific length and is higher than the terminal of a horn wall curve, so that the effects of broadening the low-frequencybandwidth and controlling a directional diagram are further realized, and meanwhile the phase center position is controlled to be close to the aperture position as much as possible.

Description

technical field [0001] The invention relates to the technical field of compact field feed antennas, in particular to a wide-band ridge probing four-ridge circular horn feed antenna. Background technique [0002] The feed source is the core component of the reflector antenna, which directly affects the working frequency band and overall performance of the antenna. Among them, the high-performance broadband feed source can effectively improve the working performance of the antenna. With the increasing demand for ultra-wideband feeds in many technical fields, it is proposed to obtain more stable beamwidth and radiation characteristics in a higher frequency band, so it is important for the design and application of this ultra-wideband feed antenna actual meaning. [0003] The traditional four-ridge horn antenna has a certain application space, but it has certain defects. Its pattern is asymmetric at high frequencies, and the beam width is unstable. It tends to narrow rapidly wi...

Claims

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Application Information

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IPC IPC(8): H01Q13/02H01Q1/50
CPCH01Q13/0275H01Q1/50
Inventor 苏瑞陈海波
Owner 北京中测国宇科技有限公司
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