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A Study on Design and Fabrication of Complex Type EM Wave Absorber with Super Wide-band Characteristics
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 Title & Authors
A Study on Design and Fabrication of Complex Type EM Wave Absorber with Super Wide-band Characteristics
Kim Dae-Hun; Kim Dong-Il; Choi Chang-Mook; Son Jun-Young;
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 Abstract
In order to construct an Anechoic Chamber satisfying international standards for EMI testing, it has been recognized that the absorption characteristics of the EM wave absorber must be higher than 20 dB over the frequency band from 30 MHz to 18 GHz. In this paper, an EM wave absorber with super wide-band frequency characteristics was proposed and designed in order to satisfy the above requirements by using the Equivalent Material Constant Method(EMCM) and Finite Difference Time Domain(FDTD). The proposed absorber is to attach a pyramidal absorber onto a hemisphere-type absorber on a cutting cone-shaped ferrite. As a result, the proposed absorber has absorption characteristics higher than 20 dB over the frequency band from 30 MHz to more than 20 GHz.
 Keywords
Anechoic chamber;EM wave absorber;Absorption characteristics;Hemisphere type;Complex type;
 Language
English
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