Method of forming screen printed or mask printed microwave absor

Details Method of forming screen printed or mask printed microwave absor Method of forming screen printed or mask printed microwave absor

1993-01-11

1995-03-14

Picard, Leo P.

Electricity: conductors and insulators

Anti-inductive structures

Conductor transposition

174 35MS, H05K 900

Patent

active

053978544

ABSTRACT:
An absorber for a microwave module and method of fabrication thereof wherein an ink is provided from a mixture of powdered iron and a resin. The ink is then screen printed or mask printed onto the interior surface of the lid of the microwave module in a predetermined pattern to lower the Q of the cavities within the module. The lowered Q suppresses the electromagnetic resonance and thereby minimizes the EMI problems. Furthermore, the absorber material reduces EMI between sections of the module at frequencies where no cavity resonances occur.

REFERENCES:
patent: 4647714 (1987-03-01), Goto
patent: 5008487 (1991-04-01), Shimmyo
patent: 5075525 (1991-12-01), Jung
patent: 5126518 (1992-06-01), Beckett
patent: 5164542 (1992-11-01), Hart
patent: 5175611 (1992-12-01), Richardson et al.

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