Apparatus for measuring noise factor and available gain

Details Apparatus for measuring noise factor and available gain Apparatus for measuring noise factor and available gain

1982-04-22

1985-01-01

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

455226, G01S 740, G01R 2728, G01R 2926

Patent

active

044917830

ABSTRACT:
Disclosed is a noise factor and available gain measuring apparatus in which a first noise source is connected to a first port of a circulator through a device under test, a second noise source is connected to a third port of the circulator, and the second port of the circulator is connected to a noise measuring circuit through a variable attenuator. In the apparatus, the noise factor and available gain of the device under test are separately evaluated on the basis of a plurality of overall noise factors measured with parameters of an excess noise ratio of the second noise generator and a noise factor of a noise measuring circuit containing the variable attenuator.

REFERENCES:
patent: 3464006 (1969-08-01), Kaylie
patent: 3774113 (1973-11-01), Chasek
patent: 3794999 (1974-02-01), Gellekink
patent: 3835378 (1974-09-01), Edden

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