Pulses Dispersion Distortion Modeling in a Microstrip Line

The article deals with the issues aimed at solving the most urgent problem of modern society of organization of quality communication in the conditions of ubiquitous informatization. It is considered the obtaining of expressions, which will increase the efficiency of analysis of microwave integrated devices and the study of pulse distortion in the intercell connections of ultrafast digital integrated circuits. On the basis of the quasi-dynamic approximation for the surface impedance of the microstrip structure, a simplified method of solving the dispersion equation is developed and analytical expressions for analyzing the frequency dependences of the effective dielectric permittivity and the dissipation angle tangent in the microstrip line are obtained in closed form. The expressions provide high accuracy of modeling dispersion properties in the absence of frequency limitations. Absence of frequency limitations allowed to use the obtained expressions for modeling of pulse distortion in inter-element microstrip connections. The results of calculations of dispersion characteristics and distortion of a Gaussian pulse confirming adequacy of modeling are presented. The obtained expressions for modeling the dispersion characteristics of the microstrip line are of high enough accuracy and are applicable in the whole frequency range. The discrepancy with the data of strictly electrodynamic modeling is about 2 percent.