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.