Title :
A high yield ultra small passive vector modulator based phase shifter for smart antenna combining at C-band
Author :
Ellinger, Frank ; Vogt, Rolf ; Bachtold, W.
Author_Institution :
Lab. for Electromagnetic Fields & Microwave Electron., Swiss Fed. Inst. of Technol., Zurich, Switzerland
Abstract :
A passive, vector modulator based phase shifter MMIC is presented, using a commercial 0.6 μm GaAs MESFET process. A continuously adjustable 360° phase control is achieved by combining and weighting two out of three vectors with phase offsets of 120°. The amplitude of the vectors are controlled by cold FETs. The phase offsets of 120° are generated by LC low/highpass filters. A loss of 9 dB and a -1 dB input compression point of 16.5 dBm were measured. The circuit requires an effective chip size of only 0.5 mm2, which to our knowledge is the smallest continuously adjustable 360° phase shifter, reported to date
Keywords :
III-V semiconductors; MESFET integrated circuits; MMIC phase shifters; adaptive antenna arrays; field effect MMIC; gallium arsenide; microwave antenna arrays; modulators; phase control; 0.6 micron; 9 dB; C-band arrays; GaAs; GaAs MESFET process; LC high-pass filters; LC low-pass filters; SHF; cold FETs; continuously adjustable 360 degree phase control; high yield phase shifter; passive vector modulator based phase shifter; phase shifter MMIC; smart antenna combining; ultra small phase shifter; FETs; Filters; Gallium arsenide; Loss measurement; MESFETs; MMICs; Phase control; Phase modulation; Phase shifters; Semiconductor device measurement;
Conference_Titel :
Microwave Conference, 2000 Asia-Pacific
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6435-X
DOI :
10.1109/APMC.2000.925951
