Title :
A 75 GHz to 115 GHz quasi-optical amplifier
Author :
Budka, T.P. ; Trippe, M.W. ; Weinreb, S. ; Rebeiz, Gabriel M.
Author_Institution :
Center for Space Terahertz Technol., Michigan Univ., Ann Arbor, MI
fDate :
5/1/1994 12:00:00 AM
Abstract :
A wideband quasi-optical amplifier employing two pyramidal back-to-back horns has been developed. Using a four-stage W-band low noise amplifier (LNA) designed and fabricated by Martin Marietta Laboratories, the quasi-optical amplifier gives a system gain greater than 11 dB from 86 GHz to 113 GHz without any low frequency oscillations. A peak system gain of 15.5 dB is measured at 102 GHz, and the measured noise figure of the system is 7.4 dB at 94 GHz. The quasi-optical amplifier design maintains the same polarization of the received and transmitted signal, provides better than -40 dB isolation, and can be fabricated monolithically at millimeter-wave frequencies
Keywords :
MMIC; field effect integrated circuits; microwave amplifiers; wideband amplifiers; 11 to 15.5 dB; 7.4 dB; 75 to 115 GHz; MODFETs; four-stage W-band low noise amplifier; isolation; millimeter-wave frequencies; noise figure; peak system gain; pyramidal back-to-back horns; received signal; signal polarization; transmitted signal; wideband quasi-optical amplifier; Broadband amplifiers; Frequency; Gain measurement; Laboratories; Low-frequency noise; Low-noise amplifiers; Noise figure; Noise measurement; Polarization; Signal design;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
