CPW to microstrip transition using different CPW ground plane structures

Abstract

The multilayer circuits are suffers from passive components effect to transit high frequency signal. The passive components are capacitive and inductive reactance of the planar integrated circuit. The part of overall circuit efficiency depending on passivity of the components, interconnections and its geometrical structure, which is helps to build low loss multilayer integrated circuits (MIC). The aim of this paper is to design coplanar wave guide (CPW) to microstrip line transition structure with 1GHz to 75GHz operating frequency band. The linear tapered transition method is used and inspected with four different CPW ground plane structures are conventional, stepped edge, sharp edge and linear curvature edge. The linear curvature edged CPW ground plane structure gives better transition efficiency, operating frequency band and lower insertion loss compare to conventional, stepped edge and sharp edge structures. The designed structures are electromagnetic simulated using NI/AWR tool. The CPW to microstrip line structure is compact in size and widely used for RF/Microwave circuit component development.