There are generally two types of this pathway, one is i.e., conductive coupling mode and radiative coupling mode.
The occurrence of any electromagnetic interference is bound to exist in the transmission of interference energy and transmission path or transmission channel. It is generally believed that electromagnetic interference transmission has two ways: one is the conduction transmission mode, the other is the radiation transmission mode. Therefore, from the point of view of the sensitive period of the interference, interference coupling can be divided into two categories: conduction coupling and radiation coupling.
Conducted transmission must have a complete circuit connection between the interference source and the sensitive period, the interference signal is passed along this connection circuit to the sensitive, the interference phenomenon occurs. This transmission circuit may include wires, conductive members of the equipment, power supply, public **** impedance, ground plate, resistance, inductance, capacitance and mutual inductance components and so on.
Radiated transmission is propagated through the ring in the form of electromagnetic waves. Interference energy is emitted into the surrounding space according to the laws of the electromagnetic field. There are three common types of radiated coupling:
1. Electromagnetic waves emitted by antenna A are accidentally accepted by antenna B, known as antenna-to-antenna coupling
2. Electromagnetic fields in space are induced by wires and coupled, known as field-to-wire coupling
3. High-frequency signals are induced between two parallel wires, known as wire-to-wire induced coupling
In practical engineering, two In practical engineering, the interference between the two devices usually contains many ways of coupling. It is because of the simultaneous existence of a variety of ways of coupling, repeated cross-coupling, *** with the resulting interference, only to make electromagnetic interference becomes difficult to control.