• Proceedings of the Korea Electromagnetic Engineering Society Conference
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• 2005.11a
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• pp.415-420
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• 2005

To construct an anechoic chamber for EMI test satisfying some international standards, it has been recognized that the absorption characteristics of the EM wave absorber must have more 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 EMCM[1]. As a result, the proposed absorber has absorption characteristics more than 20 dB over the frequency band from 30 MHz to more than 20 GHz.

• Journal of Navigation and Port Research
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• v.30 no.2
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• pp.161-166
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• 2006

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.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.551-554
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• 2005

In this Paper, a super wide-band EM wave absorber was designed by attaching pyramidal type absorber on a ferrite absorber. The used ferrite absorber was in hemisphere type on a cutting cone-shaped absorber. As a result, the bandwidth has been broadened from 30 MHz to 18 GHz and the total height of the EM Wave absorber is relatively low profile of 14.26 cm.