Phase Change Material (PCM) RF Switches With Integrated Decoupling Bias Circuit

This letter presents the implementation of an integrated bias circuit for controlling the heating and cooling of a phase-change material (PCM) switch. By integrating a parallel bias capacitance to ground on the heater circuit, we show that the proposed design reduces the influence of bias probes on the switch response. The measured insertion loss is less than 1 dB up to 28 GHz, and we experimentally show that this switch circuit improves isolation by more than 8.5 dB, as expected from simulations.