Title :
New measurement method of RF absorber characteristics by large square coaxial line
Author :
Takeya, Shigeru ; Shimada, Kazuo
Author_Institution :
Riken Eletech Corp., Ibaraki, Japan
Abstract :
A large square coaxial line has been developed for precise evaluation of RF absorbers, especially at frequencies below 100 MHz. The coax requires no metal reflector at the bottom of RF absorber test sample, so that a transmitted wave as well as a reflected wave can be measured. The characteristics of cascaded absorbers are calculated from measured data on each absorbing material. With the coax, a precise evaluation of the performance degradation due to the air gap influence of the ferrite absorber can be made
Keywords :
coaxial cables; electromagnetic wave absorption; electromagnetic wave reflection; electromagnetic wave transmission; ferrites; materials testing; absorbing material; air gap; cascaded absorbers; ferrite absorber; large square coaxial line; measurement method; performance degradation; reflected wave; transmitted wave; Air gaps; Anechoic chambers; Coaxial components; Conductors; Ferrites; Frequency measurement; Phase measurement; Radio frequency; Reflectivity; Tiles;
Conference_Titel :
Electromagnetic Compatibility, 1993. Symposium Record., 1993 IEEE International Symposium on
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-1304-6
DOI :
10.1109/ISEMC.1993.473702
