Electro-magnetic wave absorbing material

Details Electro-magnetic wave absorbing material Electro-magnetic wave absorbing material

1983-03-25

1985-08-27

Gron, Teddy S.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

252 6255, 252 6257, G01S 736, B22F 300

Patent

active

045381518

ABSTRACT:
An electro-magnetic wave absorbing member comprises a mixture of short fibers of metal or alloy having a high electroconductivity, a length of from 0.1 mm to 50 mm and a length to diameter ratio of larger than 10, ferrite and a high molecular weight synthetic resin. In a modification a sheet of this material is used as a low input impedance layer and laminated with an electroconductive sheet and an impedance conversion layer. The member of this invention can increase electrical loss contributing to the absorption of electric magnetic wave, can stably control the absorption and can be used in many applications.

REFERENCES:
patent: 3737903 (1973-06-01), Suetake et al.
patent: 3996167 (1976-12-01), Brown
patent: 4051097 (1977-09-01), Aldrich
patent: 4104900 (1978-08-01), Nels
patent: 4173018 (1979-10-01), Dawson et al.
patent: 4280935 (1981-07-01), Ogiwara

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