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A Frequency Selective Subreflector with Wide Bandwidth Angle Operation

A technology of frequency selection and sub-reflector, applied in antennas, electrical components, etc., can solve the problems of flexible substrate and metal pattern distortion, deterioration of frequency selection surface performance, etc., to improve wide-angle working performance, good maintainability, The effect of reducing the array spacing

Active Publication Date: 2019-12-03
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For curved surfaces that cannot be planarly developed, such as ellipsoids and hyperboloids, this method will cause distortion of the flexible substrate and metal patterns, which will eventually seriously deteriorate the performance of the frequency selective surface

Method used

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  • A Frequency Selective Subreflector with Wide Bandwidth Angle Operation
  • A Frequency Selective Subreflector with Wide Bandwidth Angle Operation
  • A Frequency Selective Subreflector with Wide Bandwidth Angle Operation

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Embodiment Construction

[0023] Combine below Figure 1 to Figure 4 The present invention is further described. However, the scope of protection of the present invention is not limited to the implementation examples.

[0024] Such as figure 1 As shown, the frequency selective sub-reflector used in the present invention consists of two parts: a metal curved surface 1 and a dielectric cone 2 .

[0025] Such as figure 2 As shown, the metal curved surface 1 contains periodically arranged through holes 3, the opening direction of the through holes 3 is along the normal direction of the metal curved surface, each through hole 3 is filled with a dielectric cone 2, and the size of the through holes 3 is consistent , the size of the dielectric cone 2 is also consistent; the center spacing of the through holes is between 0.1 times the wavelength and 1 times the wavelength, and the diameter of the through holes is smaller than the center spacing of the through holes; the thickness of the metal curved surface...

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Abstract

The present invention relates to a frequency selective secondary reflector operating at a wide bandwidth angle. The frequency selective secondary reflector includes two parts: a perforated metal curved surface and a dielectric cone array. The metal curved surface is a hyperboloid or ellipse, and the curved surface contains a large number of densely arranged through-hole arrays. Each via on the metal surface is filled with a dielectric cone. The medium cone is divided into three parts: the middle section, the bayonet section and the frustum section. The diameter of the middle section is consistent with the diameter of the through hole on the metal curved surface; the height of the middle section is consistent with the thickness of the metal curved surface. The bayonet section securely fits the media cone to the curved metal surface. The material selected for the dielectric cone has an extremely low loss tangent in the microwave frequency band. The sub-reflector has the characteristics of wide-bandwidth angular operation, and can be applied to a dual-reflector antenna system with a short focal-diameter ratio.

Description

technical field [0001] The invention belongs to the fields of satellite communication, deep space exploration, reconnaissance and confrontation, remote sensing and telemetry, etc., and relates to a frequency-selective sub-reflection surface working at a wide bandwidth angle. Background technique [0002] Dual-reflector antennas are widely used in satellite communications, deep space exploration, reconnaissance and countermeasures, remote control and remote sensing and other fields. The dual-reflector antennas mainly include Cassegrain type and Gregorian type. The secondary reflector of the Cassegrain antenna is a hyperboloid, and the secondary reflector of the Gregorian antenna is an ellipse. Dual-dish antennas perform better than single-dish antennas. [0003] The frequency selective surface is a functional surface composed of periodic arrangement of structural units. It exhibits metal characteristics for electromagnetic waves of a certain frequency band and acts as a tot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/0013
Inventor 何应然贾丹肖松丁宁杜彪
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP