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1.Shielding Design
Sensitive circuits (such as RF receivers or analog signal processing circuits) should be equipped with metal shielding covers, which must be properly grounded. Maintain sufficient spacing (≥10 mm) between high-speed signal lines, power lines, and sensitive traces, or isolate them with copper ground planes.
2.Filtering and Grounding Optimization
Interface circuits (e.g., USB, Ethernet ports, power interfaces) should include series common-mode inductors and parallel TVS diodes to suppress common-mode interference. All signal lines for external interfaces must undergo filtering before being routed out of the PCB.
3.Minimizing Radiation Sources
Avoid long parallel traces, unterminated transmission lines, and large floating copper areas. Keep clock signals and high-speed traces as short as possible, and surround them with ground planes to form a “microstrip line” structure, thereby reducing electromagnetic radiation.
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