Title :
360° reflection-type analogue phase shifter implemented with a single 90° branch-line coupler
Author :
Yoo, Tae-Whan ; Song, Jae-Ho ; Park, Moon-Soo
Author_Institution :
Opt. Transmission Sect., Electron. & Telecommun. Res. Inst., Daejeon, South Korea
fDate :
1/30/1997 12:00:00 AM
Abstract :
A small reflection-type 360° analogue phase shifter is realised with four varactors and a 90° branch-line coupler. New design formulas for the phase shift and the insertion loss are derived and applied to the circuit optimisation. The phase shifter shows a total phase shift of 380° and an insertion loss of 4.5±0.8 dB at 10 GHz. The variation of the phase is <4° over the whole range of temperature from 0 to 50°C
Keywords :
circuit optimisation; microwave circuits; microwave phase shifters; varactors; waveguide couplers; 0 to 50 degC; 10 GHz; 3.7 to 5.3 dB; branch-line coupler; circuit optimisation; insertion loss; reflection-type analogue phase shifter; varactors;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19970140
