Title :
Focusing properties of liquid crystal lens cells with stack-layered structure in the millimeter-wave region
Author :
Tanaka, M. ; Sato, S.
Author_Institution :
Dept. of Electr. & Electron. Eng., Akita Univ., Japan
fDate :
5/1/2002 12:00:00 AM
Abstract :
Liquid crystal (LC) lens cells are fabricated using a nematic LC material with a positive dielectric anisotropy and semicircle-shaped metal substrates as quasioptical millimeter-wave devices. The millimeter-wave focusing properties of the LC lens are measured at 94 GHz and its convergent effects caused by the lens-shaped configuration are then observed. Changes in the focusing properties by applying an external electric field are confirmed.
Keywords :
focusing; lenses; liquid crystal devices; millimetre wave devices; nematic liquid crystals; 94 GHz; EHF; MM-wave focusing properties; convergent effects; external electric field; liquid crystal lens cells; nematic LC material; positive dielectric anisotropy; quasioptical millimeter-wave devices; semicircle-shaped metal substrates; Crystalline materials; Dielectric devices; Dielectric materials; Dielectric substrates; Inorganic materials; Lenses; Liquid crystal devices; Liquid crystals; Millimeter wave measurements; Optical materials;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/7260.1000190
