To improve the anti-interference ability and electromagnetic compatibility of electronic products" means implementing measures and practices during PCB design to enhance the product's resistance to interference and its ability to coexist without causing or experiencing electromagnetic interference (EMI).

Here are some strategies and practices for PCB design to achieve better anti-interference ability and electromagnetic compatibility:

1. Ground and Power Plane Planning:

   • Use large and continuous ground planes to provide a stable reference plane and reduce coupling between signal layers.
   • Properly segment the power plane and place decoupling capacitors near power supply pins to filter out noise and ensure clean power distribution.

2. Signal Integrity and Trace Routing:

   • Follow best practices for signal integrity, like maintaining controlled impedance for high-speed signals and avoiding sharp bends and vias in critical traces.
   • Minimize trace lengths and use differential signaling for noise-sensitive signals to reduce susceptibility to interference.

3. Component Placement:

   • Carefully place components to minimize signal loop areas and reduce the possibility of unintentional antennas that could radiate or pick up electromagnetic noise.

4. EMI Filters and Shields:

   • Use EMI filters and shielded components where necessary to suppress conducted and radiated emissions from the PCB.

5. Grounding Techniques:

   • Implement proper grounding techniques such as star grounding or separate analog and digital ground planes to avoid ground loops and reduce noise coupling.

6. Isolation and Separation:

   • Keep sensitive circuitry separated from noisy components and digital circuits to minimize interference.

7. Proper Decoupling:

   • Add decoupling capacitors to the power supply pins of ICs and components to stabilize their operation and suppress noise.

8. EMC Testing and Compliance:

   • Conduct thorough EMC testing to ensure the product complies with regulatory requirements and industry standards.

9. Avoidance of EMI Sources:

   • Identify and isolate potential sources of electromagnetic interference, such as switching power supplies and high-frequency circuits.

By incorporating these practices and experiences into the PCB design process, the electronic product's immunity to interference and its ability to coexist with other devices without causing or suffering from electromagnetic interference can be significantly improved.