Modern electronic systems may use mixed RF/digital technologies to achieve various functionalities, which leads to various intra-system interference problems including the RF interference from noisy digital circuits to sensitive RF receivers, especially when the overall system is contained in a metal enclosure. A fast method based on a cavity formulation can be used to estimate the internal noise coupling mechanisms inside the enclosure. This method assumes that only the TMz0 mode exists inside the enclosure, i.e., the electric field along the z-direction is constant. The cavity formulation fails in the region adjacent to an aperture in an enclosure wall, since the aperture introduces higher order modes. The developed closed-form expressions compute the Ez-field variation along the z-direction. Thus, they can be used to estimate the breakpoint where the cavity method is no longer effective.
F. de Paulis et al., "Closed-form Expressions for Determining Approximate PMC Boundaries Around an Aperture in a Metal Cavity Wall," Proceedings of the IEEE International Symposium on Electromagnetic Compatibility, 2008, Institute of Electrical and Electronics Engineers (IEEE), Aug 2008.
The definitive version is available at http://dx.doi.org/10.1109/ISEMC.2008.4652122
IEEE International Symposium on Electromagnetic Compatibility, 2008
Electrical and Computer Engineering
Keywords and Phrases
Perfect Magnetic Conductor (PMC); RF Interference; Cavity Method; Closed-Form Expressions; Electric Field Variation
Article - Conference proceedings
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