A Frequency Selective Surface Based Reconfigurable Rasorber With Switchable Transmission/Reflection Band

• Published in: IEEE antennas and wireless propagation letters Vol. 18; no. 1; pp. 29 - 33
• Main Authors: Bakshi, Saikat Chandra, Mitra, Debasis, Ghosh, Saptarshi
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.01.2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Absorption; Absorption spectra; Bandpass; Diodes; Frequency selective surface (FSS); Frequency selective surfaces; PIN diodes; PIN photodiodes; Pins; Radar antennas; Radar cross sections; rasorber; reconfigurable structures; Reconfiguration; Reflection; Resistors; Resonant frequency; Superhigh frequencies; Surface chemistry; Switches; Switching
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2018.2878858

In this letter, a reconfigurable rasorber has been designed based on switching activity of frequency selective surface (FSS) and resistive FSS. The proposed design consists of two periodic layers separated from each other by an air spacer. The upper layer comprising lumped resistors assists wide absorption band (above 90% absorption) from 3.8 to 10.3 GHz (entire C and partial X Band), whereas PIN diodes are mounted in the bottom layer to enable the switching operation of the rasorber at S-Band. The novelty of the proposed design lies in its reconfigurable transmission/reflection band, which switches from a bandpass response (at around 2.88 GHz) to perfect reflection, with the control of the biasing states of the diode. A sample prototype is also fabricated and experimentally verified. Wide absorption band along with switchable transmission/reflection band characteristics have made the proposed rasorber an excellent choice for various radar cross section reduction applications.