Active Frequency Selective Surface Structures Based on Varactor Diodes

A technology of frequency selective surfaces and varactor diodes, applied in antennas, electrical components, etc., can solve the problems of being unable to quickly adapt to the changing electromagnetic environment, unable to adjust or change, and achieve insensitivity, simple structure, and moving range wide effect
CN109103603BActive Publication Date: 2020-08-14NANJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF POSTS & TELECOMM
Publication Date
2020-08-14

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Abstract

The invention provides an active frequency selective surface structure based on a varactor diode, comprising a dielectric plate, and a top metal layer and a bottom metal layer respectively arranged onthe upper surface and the lower surface of the dielectric plate; the dielectric plate is provided with a metal through hole penetrating the dielectric plate and communicating with the top metal layerand the bottom metal layer; the bottom metal layer comprises a first metal sheet vertically centrally arranged, and two second metal sheets symmetrically arranged along the first metal sheet, and thesecond metal sheets are horizontally centrally distributed; the top metal layer comprises a center metal sheet and four metal sheets arranged around the center metal sheet and distributed symmetrically in the center. A metal gap is for between two adjacent metal sheets, and a varactor diode is load between that metal gaps. The structure is based on the load of a varactor diode, simple in structure, simple in feeding mode, adjustable in resonant frequency and wide in moving range, and keeps the insensitivity of resonant frequency to polarization, so the structure is suitable for complex electromagnetic environment.
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Description

technical field

[0001] The invention relates to a frequency selective surface structure, in particular to an active frequency selective surface structure based on a varactor diode, belonging to the technical field of electromagnetic waves. Background technique

[0002] Frequency Selective Surface (FSS) is a two-dimensional periodic array structure, which is a spatial filter in essence, and exhibits obvious band-pass or band-stop filtering characteristics when interacting with electromagnetic waves. Frequency selective surface has a specific frequency selective effect, so it is widely used in microwave, infrared to visible light bands. In addition, due to its good filtering of electromagnetic waves transmitted in space, it is widely used in military and civilian communications, especially in radars, radomes, and aircraft stealth. It is also used in electromagnetic stealth, electromagnetic compatibility, electronic areas of confrontation.

[0003] At present, the most resear...

Claims

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