A New CCM (Carbon Composite Matrix) Material with Improved Shielding Effectiveness for X-Band Application

Yeong-Chul CHUNG  Kyung-Won LEE  Ic-Pyo HONG  Kyung-Hyun OH  Jong-Gwan YOOK  

IEICE TRANSACTIONS on Electronics   Vol.E93-C   No.6   pp.929-931
Publication Date: 2010/06/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E93.C.929
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Electromagnetic Theory
CCM (Carbon Composite Matrix),  SE (Shielding Effectiveness),  carbon black,  epoxy,  transmission/reflection (T/R) method,  

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In this letter, a new CCM material, adding Ni powder to a conventional CCM, for X-band applications is designed and analyzed to improve the SE. To obtain the SE of the fabricated CCM accurately, material constants of the CCM of the permittivity and permeability were extracted using transmission/reflection measurements. Using the material constants derived from the measurement, the SE was calculated and the results were verified using a commercial full-wave three-dimensional electromagnetic wave simulator. The SE of the proposed the CCM was improved by approximately 4 dB in the X band compared to that of a conventional CCM. The CCM proposed in this paper can be applied as a shielding material as well as for housing of various communication systems and electrical instruments.