A wideband water antenna for WiFi applications

Abstract

A wideband monopole water antenna with a circular top loading for WiFi applications is proposed. The proposed design combines different technologies such as the circular top loading, the salty water and the 3D printed holder as a transparent radiating element. A wide bandwidth is covered and a small size is achieved. The proposed antenna has a −6 dB S11 bandwidth from 1.5 GHz to 10 GHz with a high radiation efficiency from 43% to 70% in the WiFi frequency band from 2 GHz to 6 GHz. Simulations and measurements are conducted to quantify and validate the antenna performance. It is demonstrated that this design can be a good candidate for low cost and transparent WiFi applications.