Title :
Realization of compact semi- and fully anechoic chambers using a new developed composite absorber
Author :
Ishino, Ken ; Morikawa, Takao ; Saito, Toshifumi ; Hashimoto, Yasuo ; Shimizu, Yasutaka
Author_Institution :
TDK Corp., Chiba, Japan
Abstract :
The shape of a composite absorber consisting of ferrite and dielectric lossy material was investigated to reduce the length of the absorber and improve the reflection coefficient in the low frequency range by effectively changing the cross section of the dielectric lossy materials towards the direction of the length. It was found that the most suitable change of cross section was logarithmic function. Consequently, the length of the absorber could be reduced by 35% of that of the former composite absorber and the size of the anechoic chambers with the newly developed absorber could be reduced by 20%
Keywords :
anechoic chambers; composite materials; dielectric losses; electromagnetic interference; electromagnetic wave reflection; ferrites; 30 MHz to 18 GHz; 95 cm; compact fully anechoic chamber; compact semi-anechoic chamber; composite absorber; cross section; dielectric lossy material; ferrite material; logarithmic function; low frequency range; reflection coefficient; Anechoic chambers; Attenuation measurement; Composite materials; Dielectric losses; Dielectric materials; Ferrites; Frequency; Noise measurement; Optical reflection; Shape;
Conference_Titel :
Electromagnetic Compatibility, 1994. Symposium Record. Compatibility in the Loop., IEEE International Symposium on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-1398-4
DOI :
10.1109/ISEMC.1994.385614
