Parametric Amplifier Input Noise Temperature Degradation caused by an Interfering Signal in or near the Paramp Passband
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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The dependence of the input noise temperature of a parametric amplifier upon the pump source AM noise level, when a strong interfering signal is present in or near the paramp passband, is examined both theoretically and experimentally. An equation has been derived that predicts a contribution to the paramp input noise temperature which is linearly proportional to interfering signal power, paramp gain, and pump AM noise level. Experimental verification was achieved in comparison of various klystron, gunn, and impatt oscillator pumps exciting a typical military satellite communication receiver paramp.
- Electrical and Electronic Equipment
- Non-Radio Communications