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Microwaves: thin metal slits and liquid crystals
Sambles, J. Roy
Hibbins, Alastair P.
Kelly, Robert J.
Suckling, James R.
University of Exeter; Tsinghua University, Beijing
Proceedings of SPIE
Meetings and Proceedings
Using liquid crystals to control the propagation of microwaves is a potentially interesting technology. By incorporating small amounts of liquid crystal in thin slat metal structures through which the microwaves may resonantly pass a whole new range of voltage tuned microwave devices are becoming available. Metallic sub-wavelength slit structures at microwave frequencies have been constructed which show Fabry-Perot type resonances in very thin slits. If the dielectric in such thin slits is an aligned liquid crystal it is found possible to voltage-control the resonant frequencies. Novel selective filters and structures for microwave beam steering have been fabricated leading to a new generation of liquid crystal controlled devices.
Copyright © 2004 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proceedings of SPIE Volume 5618, pp. 1-14 and is made available with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Vol. 5618, pp. 1-14