Design and Simulation of Shunt Switch Using Crab-Leg Structure for High Frequency Application

This article describes electrostatic and electromechanical analysis for capacitive shunt RF switch using crab leg structure operating in the frequency range of 10-50 GHz. Two different conducting materials (Aluminum and Gold) have been used in this studied. This work focuses on the quantitative parameters, e.g., modal analysis, stress analysis, pull-in voltage, RF analysis and spring constant for different geometrical configuration of the switch. MATLAB, HFSS and COVENTOR software’s have been used for the analytical and full wave analysis of 3D structure, respectively. The electromagnetic (S 11 > 20 dB, S 21 > 25 dB) and electromechanical (Pull-in < 5.5 V) results are in good agreements.