Lumped element realization of ring hybrids including .pi. circui

Details Lumped element realization of ring hybrids including .pi. circui Lumped element realization of ring hybrids including .pi. circui

1991-07-01

1992-12-29

Dzierzynski, Paul M.

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333120, H01P 522

Patent

active

051755173

ABSTRACT:
A broad-band lumped element ring hybrid is comprised of a .pi. equivalent of a transmission line which is coupled to an electric ground through either a plurality of capacitors or plurality of inductors. The plurality of capacitors which are coupled to ground are coupled together with an inductor, while the plurality of inductors which are coupled to ground are coupled together with a capacitor. A plurality of tank circuits are coupled to the .pi. equivalent to broaden the bandwidth of the ring hybrid. Each tank circuit comprises an inductor and a capacitor.

REFERENCES:
patent: 3484724 (1969-12-01), Podell
patent: 3781718 (1973-12-01), Gittinger
patent: 4556856 (1985-01-01), Presser
patent: 4893098 (1990-01-01), Seely et al.
Parisi, Samuel J., "A Lumped element Rat Race coupler"; Applied Microwaves; Aug./Sep. 1989; pp. 84-93.
Putnam, J. and Puente R. "A monolithic image-rejection mixer on GaAs using lumped elements"; Microwave Journal; Nov. 1987; pp. 107-116.

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