Wave transmission lines and networks – Coupling networks – Delay lines including long line elements
Patent
1990-10-22
1991-11-19
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Delay lines including long line elements
333161, H01P 1185
Patent
active
050669303
ABSTRACT:
In one embodiment a diode phase shifter has a four port coupler formed of a pair of RF coupled transmission lines. The coupler has an input port on one transmission line and an output port on the other, and each transmission line has a tunable port. Serially interconnected RF isolated gateable diodes are provided, one diode is coupled to the tunable port on one transmission line and the other diode is connected to the other tunable port. The diodes approximate a microwave open circuit when reverse biased and approximate a microwave short circuit when forward biased to a conducting state. In another embodiment a diode phase shifter employing a single stripline is described.
REFERENCES:
patent: 3436691 (1969-04-01), Hoffman et al.
patent: 3718873 (1973-02-01), Garver
patent: 4205282 (1980-05-01), Gipprich
patent: 4423393 (1983-12-01), Freitag et al.
patent: 4614921 (1986-09-01), Yarman
patent: 4859972 (1989-08-01), Franke et al.
Ham Seung
LaRoche Eugene R.
Sutcliff W. G.
Westinghous Electric Corp.
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