Matched microwave variable attenuator

Details Matched microwave variable attenuator Matched microwave variable attenuator

1989-06-14

1990-11-13

Gensler, Paul

Wave transmission lines and networks

Attenuators

333 23, H03H 1124

Patent

active

049704788

ABSTRACT:
A variable attenuator includes a plurality of circuit cells, each containing a variable resistance shunt element, cascaded to form an artificial transmission line with distributed loss represented by the variable resistance shunt element. Parameters of the transmission line are chosen in a manner to establish a characteristic impedance that is substantially independent of the shunt resistance value and to provide low insertion reflection coefficients for all attenuation values.

REFERENCES:
patent: 1018874 (1912-02-01), Campos
patent: 1601037 (1926-09-01), Nuquist
patent: 1975709 (1934-10-01), Blumlein
patent: 2459857 (1949-01-01), Watts, Jr.
patent: 3320571 (1967-05-01), Webster
patent: 4594557 (1986-06-01), Shillady

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