Self-balancing microwave comparison radiometer

Self-balancing microwave comparison radiometer

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A 3cm radiometer evolved from Allred's 3 Mc/s system is described. The sum and difference of the voltages from an aerial and a controllable noise source are formed in a magic-T hybrid and correlated. The correlator output, which is zero only for equal aerial and reference powers, is used to adjust the reference to equality. Lunar-eclipse observations are described.


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