Advances in Radio Science www.adv-radio-sci.net 1684-9965 1684-9973 5 Kleinheubacher Berichte 2006 2007 10.5194/ars-5-37-2007 http://www.adv-radio-sci.net/5/37/2007/ http://www.adv-radio-sci.net/5/37/2007/ars-5-37-2007.html http://www.adv-radio-sci.net/5/37/2007/ars-5-37-2007.pdf 37 42 2007-06-12 A new shielding effectiveness measurement method based on a skin-effect transmission line coupler T. Kleine-Ostmann thomas.kleine-ostmann@ptb.de K. Münter T. Schrader Physikalisch-Technische Bundesanstalt, Braunschweig, Germany We propose a new convenient material shielding effectiveness measurement method based on a skin-effect transmission line coupler. The method is somewhat similar to the arrangement with two coupled TEM cells known from literature. The transmission line coupler consists of a pair of identical transmission line 2-port devices. Each device contains a coaxial waveguide, with a circular inner conductor and an outer conductor having a square cross section. One side of the outer conductor is left completely open as a slot. The slot is surrounded by a large metal housing to contact the two halves. As a measure for the shielding effectiveness the coupling between the two devices is measured in terms of scattering parameters after the test material is brought between the two halves. The devices can be used in a range from low frequencies to a few GHz. ASTM D4935: Standard Test Method for Measuring the Electromagnetic Shielding Effectiveness of Planar Materials, 1999. EN 50147-1: Anechoic chambers, Shield attenuation measurement, 1997. Guy, A. W., Chung-Kwang Chou, McDougall, J. A., and Sorensen, C.: Measurement of Shielding Effectiveness of Microwave-Protective Suits, IEEE Trans. Microwave Theory Techn., 35, 984–994, 1987. Hoeft, L. O. and Tokarsky, E. W.: Measured Electromagnetic Shielding Characteristics of Fabric Made from Metal Clad Aramid Yarn and Wire, EMC 2000 Symp. Rec., 2, 883–886, 2000. IEEE Std 299: IEEE Standard Method for Measuring the Effectiveness of Electromagnetic Shielding Enclosures, 1997. Jackson, J. D.: Klassische Elektrodynamik, De Gruyter, Berlin, 2002. Kinningham, B. A. and Yenni, D. M.: Test methods for electromagnetic shielding materials, IEEE Intern. Symp. Electromagn. Comp., 223–230, 1988. Klinkenbusch, L.: On the Shielding Effectiveness of Enclosures, IEEE Trans. Electromagn. Comp., 47, 589–601, 2005. MIL Std 285: Attenuation Measurements for Enclosures, Electromagnetic Shielding, for Electronic Test Purposes, Method of, 1956. Nishikata, A., Saito, R., and Yamanaka, Y.: Low Frequency Equivalent Circuit of Dual TEM Cell for Shielding Material Measurement, IEICE Trans. Electron., E89-C, 44–50, 2006. Singer, H. and Brüns, H.: Concept II, www.tet.tu-harburg.de, 2006. Wilson, P. F., Adams, J. W., and Ma, M. T.: Measurement of the electromagnetic shielding capabilities of materials, Proc. IEEE, 74, 112–115, 1986.