Title :
A novel monolithic balanced switching low noise amplifier
Author :
Lo, D.C.W. ; Wang, H. ; Allen, B.R. ; Dow, G.S. ; Chen, S. ; Biedenbender, M.
Author_Institution :
Electron. Syst. & Technol. Div., TRW Inc., Redondo Beach, CA, USA
Abstract :
We report a monolithic novel balanced switching low-noise amplifier for use as a low-noise broadband switch or 180/spl deg/ phase shifter for application in microwave and millimeter wave control circuits. Each arm of the balanced amplifier consists of a two-stage low noise amplifier cascaded with a reflected phase shifter. By controlling the reflected phase shifters, the balanced switching low-noise amplifier exhibits two on states and two off states with an average on-off isolation of >20 dB within 5 GHz bandwidth. The two on states show an average gain of 7 dB with 180/spl deg/ phase difference from 80 to 100 GHz and an average noise figure of 6 dB from 92 to 96 GHz. These results are best data ever reported for a switch or 180/spl deg/ phase shifter at W-band.<>
Keywords :
MMIC; differential amplifiers; field effect integrated circuits; microwave amplifiers; microwave integrated circuits; phase shifters; wideband amplifiers; 180/spl deg/ phase shifter; 5 GHz; 6 dB; 7 dB; 80 to 100 GHz; HEMT process; W-band; average noise figure; average on-off isolation; balanced switching; low noise amplifier; low-noise broadband switch; millimeter wave control circuits; reflected phase shifter; Bandwidth; Broadband amplifiers; Circuit noise; Low-noise amplifiers; Microwave circuits; Millimeter wave circuits; Phase noise; Phase shifters; Switches; Switching circuits;
Conference_Titel :
Microwave Symposium Digest, 1994., IEEE MTT-S International
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-1778-5
DOI :
10.1109/MWSYM.1994.335560
