Broadband electromagnetic characterization of carbon foam to metal contact |
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| Affiliation: | 1. Department of Electronic and Electrical Engineering, Trinity College, The University of Dublin, Dublin 2, Ireland;2. Department of Mechatronic Engineering, Hubei University for Nationalities, Enshi, Hubei Province 445000, China;3. West University of Timisoara, Faculty of Physics, Dept. of Electricity and Magnetism, Bd. V. Parvan #4, 1900 Timisoara, Romania;4. Ferrotec Corporation, Bedford, NH, USA |
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| Abstract: | We investigated how the electrical contact of carbon foam with metallic surface can reduce its shielding properties. The bubble structure of the foam does not ensure a good electrical contact with the metal, and it leads to a significant reduction of the shielding effectiveness. A finite element numerical simulation was carried out by adopting a bubble/pore model of the internal microstructure of the foam, recovered by means of scanning electron microscope images. Experimental tests were carried out by inserting carbon foam samples into a coaxial transmission line. Numerical results agree well with experimental result showing significant performance reduction with respect to an ideal electrical contact. |
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