Title :
A 200-350-GHz Heterodyne Receiver
Author :
Erickson, Neal R.
fDate :
6/1/1981 12:00:00 AM
Abstract :
A low-noise heterodyne receiver for the 200-350-GHz region has been developed and used in astronomical observations. Two-room temperature mixers cover this range, with local oscillator (LO) power provided by frequency multiplied klystrons. A single crossed waveguide multiplier design covers the entire range, and is found to provide adequate output power by either doubling or tripling. Signal-LO diplexing is done with a quasioptical diplexer based on a Martin-Puplett interferometer. The best system sensitivities obtained with the two mixers have been 2100 K SSB at 242 GHz and 2900 K at 285 GHz.
Keywords :
Amplitude modulation; Electromagnetic waveguides; Frequency; Local oscillators; Microwave devices; Microwave theory and techniques; Power generation; Telescopes; Temperature distribution; Varactors;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.1981.1130392
