Solving electromagnetic interference (EMI) problems usually requires comprehensive consideration of different aspects, including equipment design, circuit design, electromagnetic shielding, filtering, grounding, etc. Here are some common electromagnetic interference solutions:

Equipment design and layout
Layout separation: Ensure layout separation of sensitive components and high-noise components to reduce the chance of interference.
Detour: Design signal lines to avoid crossing noisy lines.
Differential mode transmission: Use differential mode transmission to suppress common mode interference.signal jammer

circuit design
Filtering: Add filters such as RC filter, LC filter or LCL filter to reduce high frequency noise in the signal.
Switching speed control: Reduce the switching speed of high-speed switching components to reduce radiation interference.
Ground Design: Use proper ground design, including the use of separate digital and analog grounds.

Electromagnetic shielding
Metal Enclosure: Use a metal enclosure, such as aluminum or steel, to shield the device and reduce radiation.
Ferrite Materials: Ferrite materials are used to reduce magnetic field radiation.
Electromagnetic shielding: Adding electromagnetic shielding to specific components or circuits to block radiation.

Power quality improvements
Power supply filtering: Use power supply filters to reduce high-frequency noise on power lines.
Voltage Regulator: Use a voltage regulator to maintain a stable supply voltage.

Differential mode transmission
Common Mode Inductor: Use a common mode inductor to suppress common mode noise.
Differential Mode Transmission Lines: Use differential mode transmission lines to reduce common mode interference on the transmission line.