Wave transmission lines and networks – Plural channel systems – Nonreciprocal gyromagnetic type
Patent
1988-12-27
1990-04-24
Gensler, Paul
Wave transmission lines and networks
Plural channel systems
Nonreciprocal gyromagnetic type
333246, H01P 1387
Patent
active
049203231
ABSTRACT:
A miniature circulator which is compatible with integrated circuits is described. The circulator includes a substrate which supports three copolanar waveguide transmission lines which are connected at a common junction. The common junction provides a coupling structure between the coplanar waveguide transmission lines. A ferrite disc having a conductive layer disposed thereover is provided over the intersection of the three coplanar waveguide transmission lines. A magnet is then disposed over the ferrite disc to direct a D.C. magnetic field through the disc. An alternative coupling structure having interwoven, balanced lines disposed on the substrate is also described. An alternative arrangement for the ferrite disc having a hexangular shape, which carries a beam-lead node metalization is also described.
REFERENCES:
patent: 3467918 (1969-09-01), Dunn et al.
patent: 3522555 (1970-08-01), Hashimoto et al.
patent: 3560893 (1971-02-01), Wen
Knerr, R. H. et al., "A Compact Broad-Band Thin-Film Lumped-Element L-Band Circulator", IEEE Transactions on Microwave Theory and Techniques, Dec. 1970, pp. 1100-1107.
Knerr, R. H., "A 4-GHz Lumped-Element Circulator", IEEE Transactions on Microwave Theory and Techniques, Mar. 1973, pp. 150-151.
Knerr, R. H., "An Annotated Bibliography of Microwave Circulators and Isolators: 1968-1975", IEEE Transactions on Microwave Theory and Techniques, vol. MTT-23, No. 10, Oct. 1975, pp. 818-825.
Ogasawara, N. et al., "Coplanar-Guide and Slot-Guide Junction Circulator", Electronics Letters, May 6th, 1971, vol. 7, No. 9, pp. 220-221.
Blight Ronald E.
Mozzi Robert L.
Schloemann Ernst F. R. A.
Gensler Paul
Maloney Denis G.
Raytheon Company
Sharkansky Richard M.
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