High-frequency circuit element

Details High-frequency circuit element High-frequency circuit element

1997-02-04

1999-11-02

Zimmerman, John J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428469, 428693, 428900, B32B 1516, H01P 136, H01P 138

Patent

active

059766794

ABSTRACT:
A high-frequency circuit element which can be formed by firing simultaneously a microwave magnetic body and a hard magnetic body plate in the form of a laminate. The microwave magnetic body is made of calcium-vadium-iron and the hard magnetic body plate is made of strontium-iron, so that they have approximately the same firing temperature. They are separated by a screening film of palladium or platinum, which prevents the diffusion of strontium ions from the hard magnetic body plate to the microwave magnetic body. This constitution permits the simultaneous firing of the two components. The high-frequency circuit element is useful as a small, high-precision circulator, isolator, or inductor.

REFERENCES:
patent: 4992338 (1991-02-01), Hartwar et al.
patent: 5379004 (1995-01-01), Marusawa et al.
patent: 5498999 (1996-03-01), Marusawa et al.
patent: 5611878 (1997-03-01), Miura et al.
patent: 5709811 (1998-01-01), Satoh et al.
patent: 5774024 (1998-06-01), Marusawa et al.
T.K. Hatwar, et al., "Control of exchange coupling for direct overwrite media using Pd metal Interlayer", Journal of Applied Physics, Nov. 15, 1991, No. 10, Pt. II, New York, US, pp. 6439-6441.

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