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Air Vent with Openings of Random Size and Location for Improved EMI Shielding and Air Flow

Air-vents on a system chassis are designed to allow efficient air flow to cool the system, while at the same time shield unwanted electromagnetic energy. This paper investigated the air vent with openings of random size and location for better shielding effectiveness (SE) and air resistance performance. Dozens of cases were simulated and demonstrate that there exist some random cases which have better SE in certain frequency range and/or air resistance performance.