The Discretization Method Of BLT Equation On Two-Wire Transmission Line

With the increase of the complexity of electromagnetic environment,more and more systems use more complex transmission line structure,transmission line theory research become the hotspot in the field of electromagnetic compatibility.In this paper,the solution of the discrete method is derived from the BLT equation,and it is extended to the case of non parallel transmission line.Firstly,based on the BLT equation,the discrete method is used to solve the terminal response of the two wire transmission line in both frequency domain and time domain.For the model of the discrete two wire transmission line,the distribution of Agrawal model is applied to obtain the discrete calculation formula of the BLT equation in frequency domain.Then the discrete calculation formula of the BLT equation in time domain is obtained by using the inverse Fourier transform.When the distribution of excitation source on the wire is known,the induced voltage and current can be calculated in the frequency domain or time domain.And then the numerical experiments under the plane wave excitation source are carried out.Secondly,the calculation formula of BLT equation in the model of non parallel two wire transmission line is obtained by divide the non parallel two wire transmission line into n segments,and each segment is treated as parallel transmission line.Agrawal model is used to get the discrete calculation formula of BLT equation in frequency domain,and the discrete calculation formula of BLT equation in time domain is obtained by the process of Fourier inverse transform.and then the numerical experiments under the plane wave excitation source are carried out.In the end,the discrete calculation method of the BLT equation of the two wire transmission line model is summarized,and the direction of the development of the theory is put forward.