A Dual-frequency Broadband Circular Polarization Grating Based on Single-Layer Dielectric

A circular polarization and dielectric technology, applied in the field of satellite communication, can solve the problems of large insertion loss and narrow bandwidth of dual-frequency circular polarization grids, and achieve the effects of high isolation, fewer unit layers, and optimized working frequency bands

Active Publication Date: 2020-12-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0006] The purpose of the present invention is to provide a dual-frequency broadband circular polarization grid based on a single-layer dielectric, which solves the problems of large insertion loss and narrow bandwidth of a dual-frequency circular polarization grid reported in the prior art under the premise of ensuring a low-profile single-layer dielectric structure. question

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  • A Dual-frequency Broadband Circular Polarization Grating Based on Single-Layer Dielectric
  • A Dual-frequency Broadband Circular Polarization Grating Based on Single-Layer Dielectric
  • A Dual-frequency Broadband Circular Polarization Grating Based on Single-Layer Dielectric

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[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0022] This embodiment provides a dual-frequency broadband circular polarization grid based on a single-layer medium, and its unit structure is as follows figure 1 , figure 2 and image 3 As shown, the circular polarization grid includes a first metal copper clad layer 1, a dielectric layer 2, and a second metal copper clad layer 3 sequentially stacked from top to bottom; the first metal copper clad layer and the second metal copper clad layer The layer structure is the same and overlapped up and down; the metal copper clad layer is spliced ​​by a plurality of metal graphic units, and the metal graphic unit is square and has a symmetrical structure along its center line; the metal graphic unit is composed of a cross type structure 12 and two and a half "I" type dipoles 11, wherein the cross type structure is located at the center point of ...

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Abstract

The invention belongs to the field of satellite communication, and provides a dual-frequency broadband circular polarization grid based on a single-layer medium. On the premise of ensuring a low-profile single-layer dielectric structure, it solves the problems of large insertion loss and wide bandwidth of the dual-frequency circular polarization grid reported in the existing reports. narrow question. In the unit structure of the circular polarization grid of the present invention, the horizontal "I" type dipole and the half "I" type dipole of the cross-shaped structure provide low frequency and high frequency resonance respectively; by adjusting the horizontal "I" type dipole The size of the pole and half "I" type dipole realizes the adjustment of the low frequency passband and high frequency passband of the circular polarization grid and the dual frequency different circularly polarized outgoing waves; and, the vertical "I" type of the cross structure The dipole further optimizes the working frequency band, achieving the insertion loss of only 1.1 and 0.8dB at the two center frequency points of 18.55 and 28.54GHz, respectively, and the effect of axial ratio bandwidth as high as 24% and 11%, completely covering the K / Ka satellite Communication working frequency band.

Description

technical field [0001] The invention belongs to the field of satellite communication, and relates to a novel dual-frequency broadband circular polarization grid, specifically a dual-frequency broadband circular polarization grid based on a single-layer medium, which is especially suitable for dual frequency satellite communication system. Background technique [0002] With the continuous development of satellite communication systems, multi-band broadband circularly polarized antennas are particularly important. Especially in the K / Ka satellite communication system, the working bandwidth of the circularly polarized antenna is required to cover two frequency bands of 17.7-20.2GHz and 27-30GHz, and different polarization working modes are shown in each frequency band. [0003] At present, there are mainly two ways to implement circularly polarized antennas: the first is to change the feed network of the antenna, and to generate two kinds of linear poles whose polarizations ar...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/24
Inventor 程钰间王洪斌赵凡樊勇宋开军林先其张波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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