A 2 Millimeter Superheterodyne Receiver Using a High Intermediate Frequency

A superheterodyne receiver for the 2 millimeter range was built using fourth harmonic mixing with a first intermediate frequency of 420 mc. The receiver noise figure, the harmonic mixer noise temperature and harmonic mixer conversion loss were experimentally obtained for first intermediate frequenci...

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Bibliographic Details
Main Author: VALENZUELA,G R
Format: Report
Language:English
Subjects:
AMPLIFIERS
CRYSTAL DETECTORS
CRYSTAL MIXERS
CRYSTAL VIDEO RECEIVERS
INTERMEDIATE FREQUENCY AMPLIFIERS
KLYSTRONS
MEASUREMENT
NOISE(RADAR)
OSCILLATORS
RADAR RECEIVERS
RADIOFREQUENCY POWER
REDUCTION
REFLEX KLYSTRONS
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Summary:A superheterodyne receiver for the 2 millimeter range was built using fourth harmonic mixing with a first intermediate frequency of 420 mc. The receiver noise figure, the harmonic mixer noise temperature and harmonic mixer conversion loss were experimentally obtained for first intermediate frequencies of 30, 420, and 500 mc. The results are in agreement with earlier work in this Laboratory. An improvement of receiver noise figure of about 3 db can be obtained by applying a forward dc bias to the harmonic mixer. (Author)