Reconfigurable Diode-Based and Liquid Metal Antenna for 5 GHz Wi-Fi

In this paper we present a reconfigurable planar antenna, tuned via PIN diode switching and liquid metal input impedance tuning. PIN diodes are used as switches to electrically add or remove radiating elements from the structure, while the liquid metal Eutectic Gallium Indium in a printed Formlabs Flex 80A resin tube is used to change the length of stub for impedance tuning at the input. A continuous tunable band across the entire 5G Wi-Fi spectrum is achieved in simulation. A gain of approximately 4 dB was achieved across the entire 5 GHz Wi- Fi spectrum.