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Dual-frequency band-pass frequency selective surface with independent switchable characteristic

A frequency-selective surface, dual-band technology, applied in the direction of the radiating element structure, electrical components, antenna grounding devices, etc., can solve the problem of polarization direction sensitivity, difficult to apply in practical scenarios, etc., to achieve simple processing and dual-frequency transmission. Wave response, simple loading effect

Pending Publication Date: 2022-04-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the switching process of the FSS, the two passbands interact with each other; and the FSS is a single-polarization design, that is, it is sensitive to the polarization direction of the incident electromagnetic wave, which is difficult to apply to actual scenarios

Method used

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  • Dual-frequency band-pass frequency selective surface with independent switchable characteristic
  • Dual-frequency band-pass frequency selective surface with independent switchable characteristic
  • Dual-frequency band-pass frequency selective surface with independent switchable characteristic

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Embodiment Construction

[0032] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation methods and accompanying drawings.

[0033] A dual-band pass-type frequency selective surface with independently switchable characteristics, including n×n square structural units, the side view of the structural unit is as follows figure 1 As shown, from top to bottom are the first metal patch layer 1, the first dielectric layer 4, the metal floor layer 12, the second dielectric layer 8 and the second metal patch layer 7;

[0034] The structure of the first metal patch layer 1 is as follows figure 2 As shown, it consists of four identical rectangular metal patches, and the remaining three rectangular metal patches are rotated by 90°, 180°, 270 It is obtained that the size of the rectangular metal patch is 27.5mm×17.5mm, and the center of the long side of the first rectan...

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Abstract

The invention aims to provide a dual-frequency band-pass frequency selective surface with an independent switchable characteristic, and belongs to the technical field of frequency selective surfaces. The frequency selective surface is of a multi-layer PCB structure and comprises two layers of rectangular patches, two dielectric layers and a layer of metal floor. According to the frequency selective surface, dual-frequency response is realized based on a dominant mode TM010 and a first high-order mode TM100 of the rectangular patch; meanwhile, PIN diodes are loaded on the two layers of rectangular patches respectively, and the loaded diodes on the two layers are controlled through direct-current bias signals respectively, so that independent switchable control over the two working frequencies is achieved. Moreover, the FSS unit is of a symmetrical structure, can gate any linearly polarized incident electromagnetic wave, and has high practicability.

Description

technical field [0001] The invention belongs to the technical field of frequency selective surfaces, and in particular relates to a dual-frequency bandpass type frequency selective surface with independently switchable characteristics. Background technique [0002] Frequency Selective Surface (FSS), as a common spatial filter, can effectively gate or shield electromagnetic waves of specific frequencies, and has a wide range of applications in wireless communication, military stealth, and electromagnetic compatibility. In order to expand its functionality, different types of FSS have been developed and researched, such as broadband FSS, dual-frequency FSS and multi-frequency FSS. Compared with wideband FSS, dual-frequency or multi-frequency FSS has more flexibility. Unlike the former covering the entire operating bandwidth, the latter can achieve multiple passbands or stopbands. However, due to the size limitation of material units, multi-frequency FSS is difficult to realiz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00H01Q1/38H01Q1/48
CPCY02D30/70
Inventor 陈波蒋碧瀟陈梦龙胡皓全唐璞田径雷世文杨伟包永芳何子远
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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