Study On Crosstalk Of PCB Microstrip Line In MRTD Method

Rocket has large number of electronic devices, using increased frequency, more and more integrated components, so the electromagnetic compatibility(EMC) of electronic devices becomes more prominent. Therefore, the study of EMC on PCB board becomes very urgent. In addition to analyse the coupling and interference mechanism of the micro-strip line on PCB board with software, it is necessary to simulate and study the EMC model.In this paper, it focuses on analysing the micro-strip line crosstalk with finite difference time-domain(FDTD) method and multi-resolution time domain(MRTD) method. Then, the impact of model's parameters to the crosstalk is studied by varying signal transmission frequency, line spacing, trace length and medium thickness. The paper follows the main content:1),An infinite space is simulated with anisotropic perfectly matched layer(APML) in FDTD algorithm. The micro-strip line and matched load are modeled. Then, the near-end crosstalk and far-end crosstalk coefficients are acquired to analyse the crosstalk by varying signal transmission frequency, line spacing, trace length and medium thickness.2),MRTD algorithm is discussed, APML is derived in db scale functions, which will be used to analyse the crosstalk on PCB board.3),The PCB board and the micro-strip are modeled with Haar scale function, db scale function, Coifman scale function as the basis functions. Therefore, it studies the micro-strip line crosstalk as well as computing accuracy and efficiency of the MRTD.4),The selection of optical basis function will be discussed in the MRTD algorithm. For the existing basis functions(Haar scale function, Coif4 scale function, Daubechies scale function), the computation efficiency and accuracy are analysed for the influence of basis function's characteristic, such as regularity, compact support, vanishing moments and smoothness.