Best Low-EMI 6ft HDMI Cable Recommendations and PCB Design Solutions for EMI Compliance

The discussion addresses EMI compliance issues caused by standard inexpensive 6ft HDMI cables, which can fail radiated EMI certification due to acting as antennas. Ferrite beads often provide insufficient mitigation. Shielding quality is critical; well-shielded cables with proper shield termination at both ends reduce EMI emissions. Price does not necessarily correlate with shielding effectiveness. A recommended cable with good EMI performance is the Multicomp MC34945 HDMI to HDMI 2m cable, noted for its shielding quality. The Raspberry Pi supplied HDMI cable is also cited as having decent EMI performance. PCB-level EMI mitigation for HDMI lines is limited; common practices include ESD protection, but common-mode chokes used in USB lines are not typically applied to HDMI. References to EMI fundamentals and HDMI high-speed PCB design guides are provided for further technical insight.
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