Microstrip Device for Broadband (15–65 GHz) Measurement of Dielectric Properties of Nematic Liquid Crystals

摘要: The essential dielectric properties, the basic alignment techniques, and common measurement methods of nematic liquid crystal (LC) at RF are briefly reviewed. A new device for broadband constants loss tangents LCs microwave millimeter-wave frequencies is presented. This whose specification fabrication outlined essentially a two layer microstrip structure with coplanar-waveguide terminals, which easy to fabricate. Compared previous structures, proposed extremely 15–65-GHz bandwidth, benefits from solid exposed ground plane temperature test, operates under bias voltage. technique extraction parameters LC analyzed by this explained sources imposing frequency limits on performance identified. Two different LCs, MDA-00-3506 GT3-23001, characterized results shown compare well those available in literature. In comparisons, maximum difference found 5% GT3-23001 5.3%.