Wide band type electromagnetic wave absorber

Details Wide band type electromagnetic wave absorber Wide band type electromagnetic wave absorber

1994-04-11

1995-08-29

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Radio wave absorber

342 4, H01Q 1700

Patent

active

054464595

ABSTRACT:
This invention relates to a broad bandwidth electromagnetic wave absorber comprising a sintered ferrite and a CuO--Fe.sub.2 O.sub.3 system. The CuO--Fe.sub.2 O.sub.3 system, a spinel ferrite, has its own magnetic property, which makes it possible to be used for an electromagnetic wave absorber. The CuO--Fe.sub.2 O.sub.3 system is preferentially located at the grain boundary in the matrix ferrite. This resulted in increase in the total loss, decrease in matching thickness and shift in the center frequency.

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