WPT Enabled SP3T Switch for Broadband Antenna Switching Applications

This paper presents a battery-less single pole triple throw (SP3T) switch enabled through wireless power transfer (WPT) for a frequency range of 0.5 - 6 GHz. A set of three rectifying circuits, each connected to their independent antenna elements (rectennas) were designed. These rectennas were designed to operate at 2.3 GHz, 2.45 GHz, and 2.6 GHz, respectively. Different frequencies were used to avoid any interference between received signals. The three RF output ports of the switch were biased using each rectenna. A minimum of 1.8 V is required to actuate each RF port that was rectified when the input power ranges from 0-2 dBm with RF-to-DC power conversion efficiency (PCE) which is around 50% for each rectifier. The proposed battery-less SP3T switch paves the way to reconfigure microwave devices and antennas for a broad range of applications.