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A Frequency Selective Surface with Stable Frequency Response

A frequency selective surface, frequency response technology, applied in antennas, electrical components and other directions, can solve the problems of RFID tags with great environmental impact and difficult practical application.

Active Publication Date: 2020-08-07
南京康沙科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A common problem in current RFID applications is that the response of RFID tags (Tag) is greatly affected by the environment
The same RFID tag is installed on different media, such as plastic, wood, buildings, packaging boxes, clothing, etc., its frequency response, recognition distance, etc. will have different effects, which brings great difficulties to practical applications

Method used

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  • A Frequency Selective Surface with Stable Frequency Response
  • A Frequency Selective Surface with Stable Frequency Response
  • A Frequency Selective Surface with Stable Frequency Response

Examples

Experimental program
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Embodiment Construction

[0016] A frequency selective surface with a stable frequency response, the basic resonant unit of the frequency selective surface FSS (as shown in Figure 1 (a). Each resonant unit) is composed of two kinds of thick and thin transmission lines, and the thick transmission line is a rectangular flat flag surface , the thin transmission lines are in the shape of a flagpole, and they are connected together to form a flag shape. Each resonant unit is composed of a flag and a flag rotated 180 degrees side by side; the thin transmission lines are connected to form a metal wire frame that constitutes a resonant unit. qb or dp, if the flagpole is not adjacent, then each unit is bq or pd, or bp or dq; the novel and unique feature of the method of the present invention is that the upper and lower layers of the FSS have the same shape, but are mirror-image symmetric or flipped symmetric (Flipped); as The mirror image of qb is dp shape, and the mirror image of dp is qb shape. When there is ...

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Abstract

A frequency selection surface with stable frequency responses is provided; the basic resonance unit of the frequency selection surface FSS comprises a thick transmission line and a thin transmission line; the thick transmission line is a rectangle flat-plate-shaped flag surface, the thin transmission line is in a flagpole shape, and said two are connected in a flag shape; each resonance unit comprises one flag and a flag rotating in 180 degrees, wherein the two flags are arranged side by side; the thin transmission line connects to form a metal wire frame of the resonance unit; each unit is ina qb or dp shape if the flagpole is close; each unit is in a bq or pd, bp or dp shape if the flagpole is not close; the FSS has a upper layer and a lower layer, wherein the two layers are same in structure, and in a mirror symmetry or overturn symmetry.

Description

technical field [0001] The invention relates to a frequency selective surface FSS, especially a frequency selective surface structure and material with stable frequency response. Background technique [0002] The existing frequency selective surface (FSS) is a single-layer or multi-layer periodic array structure composed of a large number of passive resonant units uniformly arranged, and is composed of periodically arranged metal patch units or aperture units. This surface can present band-rejection (patch type) or band-pass transmission characteristics (aperture type) near the resonant frequency of the unit. At present, FSS is widely used and can be used in the negative reflector of reflector antenna to realize frequency multiplexing and improve The utilization rate of the antenna can be used in stealth technology, such as the radar radome to reduce the radar cross section of the antenna system, etc. This selective structure has good selectivity for the transmission and re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/0013H01Q15/0026
Inventor 周加峰穆乌德侯赛因黄易杨刚
Owner 南京康沙科技有限公司