Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1989-12-26
1991-02-12
Gensler, Paul
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333120, 333138, 333156, H03H 748
Patent
active
049927612
ABSTRACT:
A passive 180 degree MMIC (monolithic microwave integrated circuit) hybrid is developed which yields broad band widths, decreases the circuit surface area to increase production yield, and is compatible with GaAs (gallium arsenide) media used in MMIC circuits. The passive 180 degree MMIC hybrid comprises a in-phase combiner coupled to a delay transmission line through a plurality of adjusting capacitors. The coupling points of the in-phase combiner and the delay transmission line are further coupled to respective 180 degree hybrid outputs. A 0/180 input is coupled in common to the delay transmission line. The 90 degree hybrid comprises a plurality of transmission lines coupled to a 0/0 input of the 180 degree hybrid.
REFERENCES:
patent: 2639325 (1953-05-01), Lewis
patent: 3229233 (1966-01-01), Pon
patent: 3419823 (1968-12-01), Seidel
patent: 3681697 (1972-08-01), Moroney
Seely Warren L.
Staudinger Joseph
Gensler Paul
Motorola Inc.
Powell Jordan C.
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