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A Dual Bandwidth Angular Circular Polarization Grating Based on Miniaturized Cells

A circular polarization and broadband technology, applied in the field of satellite communication, can solve the problems of poor stability of the incident angle and achieve the effect of improving the stability of the incident angle

Active Publication Date: 2021-03-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to provide a dual-bandwidth angular circular polarization grid based on a miniaturized unit, which can effectively solve the problem of poor stability of the incident angle of the dual-frequency circular polarization grid under the premise of ensuring broadband and low insertion loss

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  • A Dual Bandwidth Angular Circular Polarization Grating Based on Miniaturized Cells
  • A Dual Bandwidth Angular Circular Polarization Grating Based on Miniaturized Cells
  • A Dual Bandwidth Angular Circular Polarization Grating Based on Miniaturized Cells

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0020] This embodiment provides a dual-band bandwidth angular circular polarization grid based on a miniaturized unit, the unit structure of which is as follows figure 1 , figure 2 and image 3 As shown, it includes the first metal copper clad layer 1, the first dielectric layer 2, the second metal copper clad layer 3, the second dielectric layer 4, the third metal copper clad layer 5 stacked in sequence from top to bottom, the first metal The copper clad layer 1, the second metal copper clad layer 3 and the third metal copper clad layer 5 are connected through the first dielectric layer 2 and the second dielectric layer 4 to form a circular polarization grid unit, and each unit adopts a rectangular arrangement to form an infinite grid. Large circular polarization grid; more specifically:

[0021] The third metal copper-clad layer 5 has th...

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Abstract

The invention belongs to the technical field of satellite communication, and specifically relates to a dual-frequency wide-band angular circular polarization grid based on a miniaturized unit, which effectively solves the poor stability of the incident angle of the dual-frequency circular polarization grid under the premise of ensuring broadband and low insertion loss problems; especially suitable for dual-frequency scanning circular polarization satellite communication systems with large capacity, low loss and high incident angle stability. The invention makes full use of the composite structure of short microstrip lines and metal wire grids, which can greatly enhance the cross-polarization suppression ability, and is easy to expand the bandwidth and reduce insertion loss; at the same time, by loading four A short stub forms a deformed "I"-shaped short microstrip line, which can further reduce the unit size to 0.13×0.18 working wavelengths, and significantly improve the stability of the incident angle; 0.5 and 1.5dB, the relative axial ratio bandwidth is as high as 33% and 12% respectively, and the maximum workable incident angle is increased to 45 degrees, which is significantly better than the 25 degrees of the prior art.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and relates to a dual-band width and wide-angle circular polarization grid, specifically a dual-band width and wide-angle circular polarization grid based on a miniaturized unit, which is especially suitable for large capacity, low loss and high Dual-frequency scanning circular polarization satellite communication system with incident angle stability. Background technique [0002] The K / Ka band circularly polarized satellite communication system not only needs a wide operating frequency band, such as the downlink frequency band 17.7-20.2GHz (13%) and the uplink frequency band 27-30GHz (11%), but also needs to have wide incident angle stability for use in beam scan. A relatively simple way to generate circularly polarized waves is to load a circularly polarized grid at a certain distance from the radiation port of the line-polarized antenna. The antenna and the polarized grid can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/24H01Q1/38
CPCH01Q1/38H01Q15/244
Inventor 程钰间王洪斌刘南枫樊勇张永鸿林先其赵明华宋开军敬守钊张波何宗锐陈其科
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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