If there are other RF signal lines around the RF signal wiring, an auxiliary ground copper sheet should be placed between the two, and a ground via hole should be added on the ground copper sheet at an interval of about 100 mils for isolation. For related non-RF signals (such as passing power lines), copper should be supplemented between the two, and a ground via should be added every 100mils or so. The RF signal vias are close to other wirings on the inner layer. The power lines shown are close to the RF signal vias, and the EMI interference on the power lines will enter the RF wiring. Therefore, the correct wiring method should be used. Auxiliary ground and ground vias are added between signal vias for isolation. Sometimes the RF signal line in the inner layer is close to the via holes of other signals with strong interference (such as passing power lines), and the same method is used to supplement the ground and add ground via holes.