Electromagnetic wave absorber

Details Electromagnetic wave absorber Electromagnetic wave absorber

1998-04-30

2000-05-02

Sotomayor, John B.

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

Radio wave absorber

342 2, 342 3, 342 4, H01Q 1700

Patent

active

060577967

ABSTRACT:
An electromagnetic wave absorber which is suitable for cellular phones, portable communication terminals and other portable electronic apparatus. The electromagnetic wave absorber is provided with a thin absorbing substrate formed of an electromagnetic wave absorbing material having a thickness of 0.01 .mu.m to 1.0 mm. Such a thin absorbing substrate is realized by making adjustment holes in the absorbing substrate and increasing a value of apparent magnetic permeability. Specifically, even in the absorbing substrate as thin as 0.8 mm, by making multiple adjustment holes, electromagnetic waves can be absorbed in a frequency ranging from 1.5 to 2.2 GHz.

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patent: 5777586 (1998-07-01), Luxon et al.
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