Wave transmission lines and networks – Attenuators
Patent
1989-05-19
1992-02-11
Gensler, Paul
Wave transmission lines and networks
Attenuators
307567, 307568, H03H 1124
Patent
active
050878999
ABSTRACT:
An attenuation network comprises a T or a .pi. network and first and second regulating circuits for controlling it. The T or .pi. network has at least two variable resistances. A switch S1 permits selection of a desired attenuation value which is set through the operation of the second regulating circuit on the T or .pi. network, while the first regulating circuit acts on the T or .pi. network such that its input and output resistances are kept constant.
REFERENCES:
patent: 4875023 (1989-10-01), Maoz
Symposium Digest of Papers, Editor: Barry E. Spielman; Sponsored by the IEEE Microwave Theory and Techniques Society, pp. 75-79.
"GaAs Monolithic Wideband (2-18 GHz) Variable Attenuators", Y. Tajima et al., 1982 IEEE MTT-S International Microwave Symposium Digest, Jun. 15-17, 1982, Dallas, Tex., pp. 479-481.
"Surface-Mounted GaAs Active Splitter and Attenuator MMIC's Used in a 1-10-GHz Leveling Loop", Barta et al., IEEE Transactions on Microwave Theory and Techniques, vol. MTT-34, No. 12, Dec. 1986.
"A 2 to 8 GHz Leveling Loop Using a GaAs MMIC Active Splitter and Attenuator", Barta et al., IEEE 1986 Microwave and Millimeter-Wave Monolithic Circuits.
Ahmed Adel A.
Gensler Paul
Lee Benny
Siemens-Albis AG
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