CHARACTERIZATION OF MICROSTRIP LINES NEAR-EDGE OF DIELECTRIC SUBSTRATE WITH RECTANGULAR BOUNDARY DIVISION METHOD

In this paper, the characteristics of microstrip lines near the edge o f dielectric substrate are analyzed by improving the rectangular bound ary division method. The numerical results indicate the changes of the characteristics of a microstrip line when the strip conductor is clos ely located to the edge. When the distance the dielectric substrate ed ge to the strip conductor is less than the thickness of dielectric sub strate, the effects of the edge on the line characteristics are no lon ger negligible. The numerical results in this paper show high computat ion accuracy without increasing computation time. Our improvement is e ffective for the analysis of the microstrip lines both for the narrow strip conductor and the strip conductor close to the edge. The relativ e errors between the numerical results and the measured values are les s than 1.2%.