The Overlapped Microstrip for MICs and MMICs

The overlapped microstrip-like lines and their applications feasible by means of MIC and MMIC technology have been presented. Several 3dB coupler designs and a microstrip representation of the Marchand balun are suggested as good alternatives to the well known devices. The coupler results are used to prove the balun feasibility. The brief discussion on the quasi-TEM analysis results is stressing the significance of asymmetric structures. The experimental results are limited to the MIC technology using alumina substrate.