Tunable Notch UWB Antenna Based on Variable Liquid Metal Coupling Length

In this article, we present a novel tunable UWB reconfigurable notch band antenna based on variable liquid metal (LM) coupling length. The band rejection reconfiguration is achieved by adjusting the length of LM. The mechanism of switching is based on controlling the LM in 3D print microfluidic channels by applying variable voltage. The proposed antenna has a simple configuration and compact size covering UWB (4.1-12.5GHz) and generates the band rejection in working frequency bands such as WiMAX, WiFi, Wlan, etc that is suitable for cognitive radio applications.