Figure 1 Coupled microstrip line in an EM field
Taking two parallel microstrip lines as an example, the attack line will generate electric and magnetic fields when transmitting signals, as shown in Figure 1. The electric field and magnetic field generated by the attack line can easily radiate to the adjacent microstrip line because the distance between the two microstrip lines is extremely small. Therefore, there will be a large crosstalk on the victim line, which is the direct cause of crosstalk. Two parallel coupled microstrip lines are designed as the basic model to analyze the crosstalk in detail and the methods of restraining crosstalk and ensuring transmission signal are explored. The specific structure is shown in Figure 2.