90 Degree broadband MMIC hybrid

Details 90 Degree broadband MMIC hybrid 90 Degree broadband MMIC hybrid

1988-12-05

1990-01-09

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333118, H01P 518

Patent

active

048930989

ABSTRACT:
A 90 degree hybrid is contemplated having three parallel signal paths, one of the signal paths is a central signal path which provides direct impedence to ground. The other two signal paths are capacitively coupled to the central signal path to provide a second impedence. Each signal path incorporates at least one inductor coupled in series along each of the signal paths. The signal paths are capacitively coupled to each other at each end of the inductors. To increase the bandwidth, additional hybrids are coupled in series, with each hybrid forming a section of the broadband hybrid.

REFERENCES:
patent: 1211822 (1917-01-01), Chernyshoff
patent: 3048798 (1962-08-01), Simons
patent: 3484724 (1969-12-01), Podell
patent: 3539948 (1970-11-01), Salzberg
patent: 3555461 (1971-01-01), Ralph et al.
patent: 4216446 (1980-08-01), Iwer
patent: 4556856 (1985-12-01), Presser
Higgins, Low Frequency Directional Couplers, Electrical Communicator, Jul./Aug. 1967, pp. 3, 4.

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