A FREQUENCY SELECTIVE POWER METER FOR MILLIMETER WAVES.
Final rept. for 1 Apr 63-31 Jul 64,
GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION
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An interference modulation technique for microwave radiometry is described. The technique is considered for use in the development of a frequency selective power meter for operation over a wide range of frequencies and is applicable to wavelengths well into the low millimeter region. A tunable radiometer using interference modulation was operated as a frequency selective power meter in the 4-mm region. As a source of microwaves for system calibration, a gaseous noise source having a known temperature was used. Measurements were made to determine the power output level from a crystal harmonic generator, and the 4-mm harmonic was also used with the system when operated with a frequency resolution between half power points of 8 to investigate system selectivity and spurious responses.