High power RF precision attenuator

Details High power RF precision attenuator High power RF precision attenuator

1990-12-03

1992-04-28

Gensler, Paul

Wave transmission lines and networks

Attenuators

333116, H01P 122

Patent

active

051092042

ABSTRACT:
A precision variable attenuator includes quadrature hybrid circuits, each having a first pair of isolated ports corresponding to the input and output ports of the attenuator. The second pair of isolated ports each are terminated with variable impedances in a manner to provide equal reflection coefficients at each port. Signals incident to the input port are coupled to the second pair of isolated ports and reflected therefrom to be coupled to the output port.

REFERENCES:
patent: 3559108 (1971-01-01), Seidel
patent: 4216445 (1980-08-01), Abajian
patent: 4492960 (1985-01-01), Hislop
patent: 4559489 (1985-12-01), Vacanti et al.
patent: 4902983 (1990-02-01), Fujiki et al.
Voltage-Controlled Attenuator with Low Phase Shift, NASA Tech Briefs, vol. 4, No. 3, Fall 1979, p. 326.

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