Articles | Volume 15
21 Sep 2017
 | 21 Sep 2017

Effects of Aperture Size on Q factor and Shielding Effectiveness of a Cubic Resonator

Stefan Parr, Stephan Chromy, Stefan Dickmann, and Martin Schaarschmidt

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Cited articles

Armstrong, R., Marvin, A., and Dawson, J.: An experimental investigation of the use of Q-factor to determine the shielding effectiveness of electrically large equipment enclosures with apertures, in: EMC Europe 2011 York, 148–152, 2011.
Giri, D. and Tesche, F.: Classification of intentional electromagnetic environments (IEME), IEEE T. Electromagn. C.  46, 322–328,, 2004.
Hill, D., Ma, M., Ondrejka, A., Riddle, B., Crawford, M., and Johnk, R.: Aperture excitation of electrically large, lossy cavities, IEEE T. Electromagn. C., 36, 169–178,, 1994.
Holloway, C., Hill, D., Sandroni, M., Ladbury, J., Coder, J., Koepke, G., Marvin, A., and He, Y.: Use of Reverberation Chambers to Determine the Shielding Effectiveness of Physically Small, Electrically Large Enclosures and Cavities, IEEE T. Electromagn. C., 50, 770–782,, 2008.
Klinkenbusch, L.: On the shielding effectiveness of enclosures, IEEE T. Electromagn. C., 47, 589–601,, 2005.
Short summary
Electric equipment can be shielded against high power electromagnetic fields via metallic cavities. At certain frequencies, called resonances, the shielding effectiveness collapses. In this paper the impact of different sized windows in the shield is analyzed. The results is: at a certain size of the window, approximately one third of the shield's size, the shielding effectiveness is at its minimum. Furthermore, the quality factor of shields with different windows sizes is analyzed.