Wave absorber, and an anechoic chamber using the same

Details Wave absorber, and an anechoic chamber using the same Wave absorber, and an anechoic chamber using the same

1989-07-24

1990-11-20

Barron, Jr., Gilberto

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

Radio wave absorber

H01Q 1700

Patent

active

049721917

ABSTRACT:
A flat wave absorber having a conductive plate, a dielectric plate on the conductive plate, and, a ferrite plate on said dielectric plate, provides a wide operational frequency range from 30 MHz to 1 GHz with excellent attenuation characteristics, and an anechoic chamber mounting said wave absorber on inside surface of the chamber is provided. Thickness of said dielectric plate is less than 25 mm, the thickness of said ferrite plate is less than 7.5 mm, and real part of complex impedance of said ferrite plate on the conductive plate is less than 1.0 and close to 1.0. Said ferrite plate is attached to said dielectric plate in the form of tiles.

REFERENCES:
patent: 2594971 (1952-04-01), Moullin
patent: 3737903 (1973-06-01), Suetake et al.

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