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Fully polarized flexible frequency selective surface structure and radome for suppressing spurious passband

A frequency selective surface, parasitic passband technology, applied in the radiation unit cover, electrical components, circuits, etc., can solve the problem of difficult to achieve parasitic passband suppression, small thickness, etc., to achieve good out-of-band suppression performance, RCS reduction effect.

Active Publication Date: 2019-05-31
NAT UNIV OF DEFENSE TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the defects of the existing K-band frequency selection surface radome that it is difficult to realize the single-passband operation mode that suppresses the parasitic passband, full polarization, small thickness and light weight, etc., it provides a fully polarized ultra-thin flexible Frequency Selective Surface Structure and Radome

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  • Fully polarized flexible frequency selective surface structure and radome for suppressing spurious passband
  • Fully polarized flexible frequency selective surface structure and radome for suppressing spurious passband
  • Fully polarized flexible frequency selective surface structure and radome for suppressing spurious passband

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] The present invention provides a fully polarized flexible frequency selective surface structure that suppresses parasitic passbands in the K-band, such as figure 1 Shown is a square unit structure in a fully polarized flexible frequency selective surface structure that suppresses parasitic passbands. The square unit structure 10 includes a dielectric substrate unit 11, a first metal microunit 12 attached to the upper surface of the dielectric substrate unit 11, and an attached The second metal micro-unit 13 on the lower surface of the dielectric substrate unit;

[0029] The geometric structures of the first metal microunit 12 and the second metal microunit 13 are consistent. Both layers of periodic metal micro-units are realized on the metal foil layer through etching process.

[0030] figure 2 The first metal micro-unit 12 is etched...

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Abstract

The invention belongs to the technical field of materials and antenna covers, and particularly relates to a full-polarization flexible frequency selective surface structure for inhibiting a parasiticpassband and an antenna cover. The structure comprises a dielectric substrate which is made of a non-conductive material, and periodic metal foil layers which are attached to the upper surface and thelower surface of the dielectric substrate respectively. The full-polarization flexible frequency selective surface structure is virtually divided into a plurality of periodically-arranged square unitstructures. Each square unit structure comprises a dielectric substrate unit, a first metal micro unit attached to the upper surface of the medium substrate unit and a second metal micro unit attached to the lower surface of the medium substrate unit. The antenna cover is used for covering the radiation direction of an antenna system and is composed of the full-polarization flexible frequency selective surface structure. The antenna can keep good radiation characteristics in the frequency band of the K-band from 22.3 GHz to 25.3 GHz, and a good out-of-band rejection performance is achieved outside the passband.

Description

technical field [0001] The invention belongs to the technical field of materials and radome, and in particular relates to the field of a fully polarized flexible frequency-selective surface structure and a radome working in the K-band (18GHz-26.5GHz) to suppress parasitic passbands. Background technique [0002] A frequency selective surface structure is a periodic structure with frequency selective properties. Put it in an open space and irradiate it with electromagnetic waves of different frequencies. If the operating frequency of the incident electromagnetic wave is within the passband of the frequency-selective surface structure, the structure is electromagnetically transparent to the electromagnetic wave, and the incident electromagnetic wave can pass through the structure smoothly. If it is within the stop band of the frequency-selective surface structure, the incident electromagnetic wave is reflected back and cannot pass through the structure. This frequency-select...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/20H01Q1/42
CPCH01P1/20H01Q1/42
Inventor 吴微微袁乃昌袁文韬袁野马育红张曦蒙崔开博王青平黄敬健陈曦
Owner NAT UNIV OF DEFENSE TECH
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