Title :
A 230-GHz Radiometer System Employing a Second-Harmonic Mixer (Short Papers)
Author :
Goldsmith, Paul F. ; Plambeck, Richard L.
fDate :
11/1/1976 12:00:00 AM
Abstract :
A radiometer system for use in the lambda ~ 1.3 mm (v ~ 230 GHz) region has been constructed and used for radio astronomical observations. A second-harmonic mixer employing a single Schottky diode downconverts the incident power to an IF frequency of -1400 MHz. The measured double-sideband system noise temperature is 6000 K (noise figure = 13 dB) and the double-sideband mixer conversion loss is calculated to be 10 dB. The mixer is tunable over a range of at least 15 GHz.
Keywords :
Cutoff frequency; Filters; Frequency measurement; Local oscillators; Microwave radiometry; Mixers; Noise figure; Power generation; Schottky diodes; Tuning;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.1976.1128975
