Minimum phase shift microwave attenuator

Details Minimum phase shift microwave attenuator Minimum phase shift microwave attenuator

1994-11-18

1996-05-28

Gensler, Paul

Wave transmission lines and networks

Attenuators

333262, H01P 122

Patent

active

055215602

ABSTRACT:
A minimum phase shift microwave attenuator circuit, providing very low insertion phase change with changing attenuation levels. Three PIN diodes are biased in parallel from a common node. The PIN diodes are held at zero or reverse bias for the "no attenuation" state, and are made slightly lossy to produce the attenuation state. In the attenuation state, the PIN diodes are utilized as current controlled lossy capacitors which change resistance with applied bias, but maintain constant capacitance, thereby providing low insertion phase deviation across wide attenuation levels.

REFERENCES:
patent: 3713037 (1973-01-01), Hopfer
patent: 3859609 (1975-01-01), Couvillon et al.
patent: 3921106 (1975-11-01), Williams
patent: 4019160 (1977-04-01), Kam
patent: 4097827 (1978-06-01), Williams

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