Liquid crystal tunable mm wave frequency selective surface

Wenfei Hu, Raymond Dickie, Robert Cahill, Harold Gamble, Y. Ismail, Vincent Fusco, David Linton, N. Grant, S. Rea

Research output: Contribution to journalArticlepeer-review

141 Citations (Scopus)


A frequency selective surface (FSS) which exploits the dielectric anisotropy of liquid crystals to generate an electronically tunable bandpass filter response at D Band (110-170 GHz) is presented. The device consists of two printed arrays of slot elements which are separated by a 130-mu m thick layer of liquid crystals. A 3% shift in the filter passband occurs when the substrate permittivity is increased by applying a control signal of 10 V. Measured results show that the insertion loss increases from -3.7 dB to -10.4 dB at resonance (134 GHz), thus demonstrating the potential to create a FSS which can be switched between a transmitting and a reflecting structure.
Original languageEnglish
Pages (from-to)667-669
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Publication statusPublished - 2007


Dive into the research topics of 'Liquid crystal tunable mm wave frequency selective surface'. Together they form a unique fingerprint.

Cite this