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Validation of modal/MoM in shielding effectiveness studies of rectangular enclosures with apertures

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4 Author(s)
Rajamani, V. ; Oklahoma State Univ., Stillwater, OK, USA ; Bunting, C.F. ; Deshpande, Manohar D. ; Khan, Z.A.

This paper discusses the validation of Modal/method of moments (MoM) including cases when the apertures are made as big as the wall of the enclosure (equivalent to having one side of the cavity open). The validation is done using field computations involving bodies of arbitrary shape (FEKO), a commercially available code. The results show that Modal/MoM predicts the results close to the analytical results of Robinson et al. Electron. Lett., 32 (17), 1996; Robinson et al., IEEE Trans. Electromagn. Compat., 40 (3), 240-247, 1998 for single-aperture cases and for most double-aperture cases. Also, for the cases of considering oblique incident plane waves, through validation, it has been found that Modal/MoM can predict the shielding effectiveness close to measured results for smaller angles and not for larger angles of incidence due to the edge effects. In this work, the shielding effectiveness is calculated at only one point, the center of the cavity assuming it to be the worst case. This work discovers the limitation of Modal/MoM for certain applications.

Published in:

Electromagnetic Compatibility, IEEE Transactions on  (Volume:48 ,  Issue: 2 )

Date of Publication:

May 2006

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