Crosstalk analysis and suppression of microstrip lines on PCB board

Abstract

Crosstalk is the mutual electromagnetic interference between transmission lines in electrical and electronic systems, which can reduce the reliability and security of the system and affect the normal operation of the system. By studying and analyzing the changes of the remote crosstalk between the microstrip lines on the PCB board, the integrity of the signal can be better considered when designing the PCB board. In this paper, the simulation analysis is carried out in two parts: linear load and nonlinear load. In order to more comprehensively and conveniently analyze the variation of remote crosstalk intensity between microstrip lines on PCB board under complex conditions, an equivalent circuit model of three microstrip lines under variable terminal frequency load is established for remote crosstalk analysis. A constant amplitude phase shift circuit is designed to reduce the intensity of the remote crosstalk under the condition of only changing the phase. Finally, the experimental results show that the suppression effect of the same amplitude phase shift circuit on the remote cross-talk intensity of the microstrip line caused by the initial phase of sinusoidal excitation can reach up to 38.7%.