QUASI-STATIC ANALYSIS MODELS FOR DIELECTRIC BASE SUPPORTED COPLANAR WAVEGUIDES IMPROVED BY GENETIC PROGRAMMING

Abstract

In this study, accurate and very simple quasi-static analysis models developed with genetic programming (GP) are presented in order to determine the effective dielectric constant and characteristic impedance of dielectric base supported coplanar waveguides. In order to demonstrate the validity and accuracy of the quasi-static analysis models improved by using GP, the results of proposed models in this work were compared with the quasi-static analysis results available in the literature. These comparison results show that there is a good agreement between the results of the proposed quasi-static analysis models and the quasi-static analysis results available in the literature. The design parameter ranges in this study are 2 ≤ εr1 ≤ 10, 10 ≤ εr2 ≤ 20, 20 µm ≤ h ≤ 2000 µm, 0.1 ≤ w/h ≤ 1, 0.1 ≤ s/h ≤ 4 and the characteristic impedance values of dielectric base supported coplanar waveguides corresponding these design parameter values are between 19 Ω ≤ Z0 ≤ 117 Ω. It has been observed that the accuracy of the proposed quasi-static analysis models for dielectric base supported coplanar waveguides proposed in this study is good enough for the practical applications.