The DC/DC converter is composed of switching tubes, rectifier tubes, inductors and capacitors. The sudden change of current or voltage generated by the switch tube and rectifier tube in the converter is the root cause of the converter becoming a source of interference. When the switch tube is working, the conduction time is short, forming a current peak. When the switching tube is turned off, the off time is short, which will cause a sudden change in voltage and form a voltage spike. Both current spikes and voltage spikes release large electromagnetic waves.
The vehicle antenna is the carrier of the vehicle’s communication electronic equipment or entertainment equipment to send and receive electromagnetic signals. The antenna receives the electromagnetic signal in the space and converts it into an electrical signal. After the electrical signal is adjusted by the amplifier, it is transmitted to the host of the vehicle entertainment system through the wiring harness. This means that the electromagnetic waves of the space environment may be coupled by the antenna. At the same time, the essence of the antenna is still a wire, which will also release electromagnetic waves to the surrounding environment and interfere with the electronic equipment in the surrounding environment.