Title :
A novel wide-band tunable RF phase shifter using a variable optical directional coupler
Author :
Ghorbani, K. ; Mitchell, A. ; Waterhouse, R.B. ; Austin, M.W.
Author_Institution :
Dept. of Commun. & Electron. Eng., R. Melbourne Inst. of Technol., Vic., Australia
fDate :
5/1/1999 12:00:00 AM
Abstract :
We present a novel RF phase-shifter design with a usable bandwidth of 80:1. The design is verified through demonstration of a proof of concept device, consisting of a readily available voltage variable optical coupler fabricated from LiNbO3, combined with an fiber-optic delay line. The design is analyzed theoretically and measurement of the device confirms the predicted range of operation. Methods of extension of this range of operation are discussed
Keywords :
antenna accessories; antenna phased arrays; beam steering; electro-optical devices; optical delay lines; optical directional couplers; optical feedback; optical phase shifters; optical tuning; LiNbO3; LiNbO3 coupler; optical fiber delay line; variable optical directional coupler; wideband tunable RF phase shifter; Bandwidth; Optical coupling; Optical design; Optical devices; Optical fiber couplers; Optical fiber devices; Phase shifters; Radio frequency; Voltage; Wideband;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
