RF-MEMS SPDT Capacitive Switch: Accelerating the Performance in B5G Applications

The wideband high-frequency components and hardware are the need of future communication. The switch is one of the basic integral components found in every communication system and plays a vital role in making the communication process simple by adding multi-functionality. This work reports a single pole double throw (SPDT) switch for B5G applications. The design incorporates low-loss micro-electromechanical single pole single throw (SPST) capacitive shunt switches separated by a quarter wavelength distance over a coplanar transmission line. The simulated SPDT design showed minimum insertion losses of −0.2 dB at 26 GHz and maximum isolation of −65 dB at 20 GHz. The RF response of the switch is found satisfactory over the frequency range 15–29 GHz resulting in a bandwidth of 14 GHz. For bandwidth calculation insertion loss, below 1 dB and isolation above 20 dB are computed as per the specifications of B5G.