Passband reconfigurable absorption/transmission integrated frequency selective surface and basic unit

Abstract

The invention relates to a passband reconfigurable absorption/transmission integrated frequency selective surface and a basic unit. The basic unit comprises a dielectric plate, four variable capacitors and four PIN diodes, wherein a cross-shaped metal wire and a cross-shaped metal ring belt are arranged on the surface of one side of the dielectric plate, a variable capacitor is embedded in a metalarm forming the cross-shaped metal wire, the cross-shaped metal ring belt is arranged on the outer side of the cross-shaped metal wire in a sleeving mode, a cross-shaped metal sheet and a metal square ring are arranged on the surface of the other side of the dielectric plate, the metal square ring is arranged on the outer side of the cross-shaped metal sheet in a sleeving mode, each protruding end of the cross-shaped metal sheet is connected with the corresponding edge of the metal square ring through a PIN diode, the PIN diodes are arranged in a gap between the cross-shaped metal sheet and the metal square ring, a cathode is connected with the cross-shaped metal sheet, and an anode is connected with the metal square ring. According to the invention, the frequency selective surface and the basic units are of a suction/penetration integrated structure, and have the advantages of being small in size, small in thickness and high in practicability.

Description

technical field [0001] The invention relates to the technical field of microwave metamaterials, in particular to a passband reconfigurable absorbing / transmitting integrated frequency selective surface and a basic unit. Background technique [0002] As a device to protect the antenna from harsh environments, the radome has been widely used in military and civilian applications. Although the ordinary dielectric radome can effectively protect the antenna, it cannot play the role of stealth, which seriously limits its application in the military field. As an upgraded version of the dielectric radome, the frequency selective surface radome can realize the detection of out-of-band threat radar waves. RCS reduction. The frequency selective surface is composed of a periodic array of passive resonant basic units, and its main function is to present filtering characteristics for electromagnetic waves under different frequencies, incident angles and polarization states. When the freq...

AI Technical Summary

Problems solved by technology

In the existing research, most of the absorbing / transmitting integrated frequency selective surfaces have fixed regulation performance. Once the frequency selective surface is manufactured and processed, its electromagnetic response characteristics cannot be changed.

Images