Wave absorber

Details Wave absorber Wave absorber

1998-03-13

1999-09-14

Pihulic, Daniel T.

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

Radio wave absorber

H01Q 1700

Patent

active

059529539

ABSTRACT:
A wave absorber which is light in weight, rich in flexibility and excellent in wave absorption characteristics in a microwave frequency range. The wave absorber in which composite carbon black particles including crystalline graphite and amorphous carbon black are dispersed into an insulating matrix. In the wave absorber, dispersion of the composite carbon black particles is adjusted so that a ratio (.rho./R) of a volume resistivity .rho. measured at frequencies of 30, 100 and 500 kHz to a measured DC volume resistivity R is in a predetermined range and a volume ratio of the composite carbon black particles having particle diameters of 10 nm to 200 nm to all the composite carbon black particles is in a range of 5% to 95%. Thereby, a wave absorber excellent in absorption characteristics is obtained.

REFERENCES:
patent: 3568195 (1971-03-01), Wesch
patent: 3721982 (1973-03-01), Wesch

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