High-frequency, high-power waveguide junction circulator

Details High-frequency, high-power waveguide junction circulator High-frequency, high-power waveguide junction circulator

1986-07-29

1988-01-05

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

Nonreciprocal gyromagnetic type

333 33, H01P 139

Patent

active

047178957

ABSTRACT:
A waveguide junction circulator for a high power application at a high operating frequency. The circulator includes a plurality of connecting waveguides, each of which has a standard height dimension corresponding to the operating frequency; a resonance cavity; a plurality of spaced and cooled, superposed metal plates covered with ferrite discs disposed in the cavity; a magnet disposed outside the cavity for generating a magnetic field oriented perpendicular to the ferrite discs and penetrating the cavity; and a plurality of junction arms each having one end communicating with the cavity and another end forming a connection with a respective one of the plurality of connecting waveguides. The circulator has a height dimension in its region penetrated by the magnetic field that is reduced by at least 20% compared to the standard height dimension of the connecting waveguides. Each connection presents a transition from the connecting waveguide to the junction arm that has a sudden change in cross section from the reduced height of the circulator to the standard height of the connecting waveguide. Reactance elements are provided in the junction arms to form multi-section filters.

REFERENCES:
patent: 3466571 (1969-09-01), Jansen et al.
patent: 3492601 (1970-01-01), Omori
patent: 4254384 (1981-03-01), Piotrowski et al.
Okada et al. A 100KW Waveguide Y-Junction Circulator for Microwave Power Systems at 915 Mhz Jrnl. of Microwave Pwr. Sep. 1977, pp. 201-207.
IEEE Transactions on Magnetics, vol. Mag-17, No. 6, Nov. 1981, pp. 2957-2960.

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