Microwave instantaneous frequency measurement apparatus

Details Microwave instantaneous frequency measurement apparatus Microwave instantaneous frequency measurement apparatus

1981-07-21

1983-11-08

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Phase comparison

324 84, G01R 2500

Patent

active

044145055

ABSTRACT:
The present invention provides microwave instantaneous frequency measurement apparatus which includes a power divider (2) for dividing an RF input signal line (4) for delaying the first signal, a 3 decibel hybrid coupler (5) for quadrature summing and differencing the delayed first signal and the second signal, a pair of logarithmic amplifiers (10, 11) connected to receive sum and difference outputs from the coupler, and a substrator (12) arranged to subtract the outputs from the amplifiers.

REFERENCES:
patent: 3319165 (1967-05-01), Hamlin et al.
patent: 3416077 (1968-12-01), Lacy
patent: 3517309 (1970-06-01), Gerst
patent: 3518541 (1970-06-01), Travia et al.
patent: 4206403 (1980-06-01), Tucker

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