Title :
Compact tunable Ka-band phase shifter based on liquid crystals
Author :
Moessinger, Alexander ; Fritzsch, Carsten ; Bildik, Saygin ; Jakoby, Rolf
Author_Institution :
Microwave Eng., Tech. Univ. Darmstadt, Darmstadt, Germany
Abstract :
This paper presents the design and realization of a compact phase shifter based on a tunable dual-mode ring filter at 35 GHz. The tunability is achieved by employing a thin liquid crystal layer as a tunable dielectric substrate. By applying a bias voltage in the range of 0... 40V, a tunable phase range of 117° is measured. The figure of merit of the realized phase shifter is 30.6°/dB at 34.3 GHz.
Keywords :
liquid crystals; millimetre wave filters; millimetre wave phase shifters; compact tunable Ka-band phase shifter; frequency 34.3 GHz; frequency 35 GHz; thin liquid crystal layer; tunable dielectric substrate; tunable dual-mode ring filter; Dielectric measurements; Dielectric substrates; Filters; Liquid crystal devices; Liquid crystals; Permittivity; Phase shifters; Phased arrays; Radio frequency; Voltage; Dual-mode filters; liquid crystals; phase shifters; phased arrays; reflect arrays; tunable filters;
Conference_Titel :
Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4244-6056-4
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2010.5517405
