Wave transmission lines and networks – Plural channel systems – Nonreciprocal gyromagnetic type
Patent
1979-09-24
1980-12-16
Gensler, Paul L.
Wave transmission lines and networks
Plural channel systems
Nonreciprocal gyromagnetic type
333251, H01P 139, H01P 1162
Patent
active
042400490
ABSTRACT:
A waveguide junction circulator which includes means for absorbing spurious modes. A thin, lossy element (15) is provided surrounding a portion of the gyromagnetic member (4) and orthogonal to the electric field of the incident wave. The incident wave is unaffected, but the spurious modes which are produced in the gyromagnetic member and exist as high Q resonances are selectively absorbed. The lossy element is typically a thin film resistor formed on a dielectric film.
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Owen et al., The Compact Turnstile Circulator, IEEE Trans. MTT, Dec. 1970, pp. 1096-1100.
Tan et al., Suppression of Higher Order Modes in Waveguide-Junction Circulators, etc., IEEE Trans. MTT, May 1976, pp. 271, 272.
Bell Telephone Laboratories Incorporated
Birnbaum Lester H.
Gensler Paul L.
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