ANALYTICAL STUDY OF VARIATION OF EVEN AND ODD MODE CHARACTERISTIC IMPEDANCES OF PLANAR TRANSMISSION LINE

Abstract

Stripline is a modified version of triplet structure, the first member of the planar transmission line family. It consists of a flat strip conductor placed symmetrically between two large ground planes with the intervening space homogenously filled with a dielectric substrate. The field lines concentrate around the strip conductor and decay rapidly with distance away from the strip in the lateral directions. The dominant mode of propagation is pure TEM. Microstripline is another member of planar transmission structure consisting of a metal strip attached with a dielectric substrate supported by metal plates which is the simplest and open structure used even in high frequency.