Title :
Passive Phase Shifter for W-Band Applications using Liquid Crystals
Author :
Mueller, Stefan ; Goelden, Felix ; Scheele, Patrick ; Wittek, Michael ; Hock, Christian ; Jakoby, Rolf
Author_Institution :
Inst. fur Hochfrequenztechnik, Technische Univ. Darmstadt
Abstract :
In this paper a ridged waveguide phase shifter at W-band frequencies is presented. A taper matches the ridged waveguide phase shifter to the rectangular waveguide feed. Three different liquid crystals (LC) are used: a quasi-standard LC K15, a highly anisotropic mixture MDA-03-2844, and a dual-frequency switching LC MDA-05-1132, all synthesized by Merck KgaA. The return loss of the phase shifter device is always below -10dB in the whole W-band. The maximum achievable figure-of-merit of these materials is 78deg/dB at 108 GHz
Keywords :
circuit tuning; liquid crystal devices; millimetre wave phase shifters; passive networks; 108 GHz; W-band applications; W-band frequencies; dual-frequency switching LC MDA-05-1132; highly anisotropic mixture MDA-03-2844; liquid crystal devices; millimeter wave phase shifters; passive circuits; passive phase shifter; quasistandard LC K15; reconfigurable architectures; rectangular waveguide feed; ridged waveguide phase shifter; tunable circuits; tunable devices; Anisotropic magnetoresistance; Crystalline materials; Crystallization; Frequency; Liquid crystal devices; Liquid crystals; Magnetic materials; Phase shifters; Rectangular waveguides; Tunable circuits and devices; Liquid crystals; liquid crystal devices; millimeter wave phase shifters; passive circuits; reconfigurable architectures; tunable circuits and devices;
Conference_Titel :
Microwave Conference, 2006. 36th European
Conference_Location :
Manchester
Print_ISBN :
2-9600551-6-0
DOI :
10.1109/EUMC.2006.281317
