Title :
Polarisation Independent Liquid Crystal 360° Phase Shifter for Optically Generated RF-Signals
Author :
Vogel, Wolfgang ; Berroth, Manfred
Author_Institution :
Institute for Electrical and Optical Communication Engineering, University of Stuttgart, Pfaffenwaldring 47, 70550 Stuttgart, Germany, W.vogel@int.uni-stuttgart.de
Abstract :
In this paper a phase shifter for optically generated RF signals at 5 GHz including a liquid crystal (LC) amplitude modulator is presented. A fibre coupled polymer dispersed liquid crystal cell is used to achieve a polarisation independent setup. The phase shifter covers the full 360° range and offers the possibility to adjust phase and amplitude of the RF signal independently. The phase shifter is a key component for optically fed phased array antennas in radar applications and for smart antennas in base stations for wireless telecommunication.
Keywords :
Liquid crystal polymers; Liquid crystals; Optical arrays; Optical fiber polarization; Optical modulation; Optical polarization; Optical polymers; Phase shifters; Phased arrays; Radar antennas;
Conference_Titel :
Microwave Conference, 2001. 31st European
Conference_Location :
London, England
DOI :
10.1109/EUMA.2001.339033
