Wave transmission lines and networks – Plural channel systems – Nonreciprocal gyromagnetic type
Patent
1998-08-04
1999-08-03
Gensler, Paul
Wave transmission lines and networks
Plural channel systems
Nonreciprocal gyromagnetic type
333 241, H01P 139
Patent
active
059330600
ABSTRACT:
The present invention relates to circulators for microwave frequencies and higher frequencies. The circulator (100;200;300) of the invention comprises a waveguide system, the waveguide system being situated in a waveguide house. A hole (111,211,311) is arranged in a first waveguide wall (171;271;371) of the waveguide system. A tubular piston (114;214;314) is arranged so that it can slide in the hole. A package, comprising ferrite material (132,135;235,235;332,335) in the shape of pucks, is arranged between a second waveguide wall (174;274;374) and the tubular piston, the second waveguide wall being opposite to the first waveguide wall. The tubular piston is pressed in the direction of the package. That end (117;217;317) of the tubular piston that faces away from the second waveguide wall is open, and slits (120;220;320) are arranged at this end, the slits stretching mainly in the direction of the tubular piston. A pressing element (156;255,260;355,360,364) presses the edge (165;265;365) of the end with the slits against the walls of the hole, resulting in a good mechanical and galvanic contact between the piston and the walls of the hole. The distance from the edge to the first waveguide wall is one half of the working wavelength of the circulator.
REFERENCES:
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patent: 5153537 (1992-10-01), Desmarest
International-Type Search Report corresponding to National Application No. 9601904-7, mailed Feb. 2, 1997.
"Common Waveguide Circulator Configurations", Electronic Engineering, Sep. 1974, pp. 66-69.
Gensler Paul
Telefonaktiebolaget LM Ericsson
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