A Low Profile UWB Antenna for Wireless Body Area Network: Design and Analysis

Abstract

A low profile nature ultra wide-band (UWB) antenna for wireless body area network (WBAN) is presented in this research work. This antenna can effectively reduce a proximity effect of human body and tri-monopole structure is designed with regular rectangular pattern. The low cost FR-4 epoxy substrate material is constructed along with coaxial feeding achieves the UWB characteristics. This proposed structure produces a bandwidth from 3GHz to 10GHz, which is highly required for higher data transmission for WBAN application. The return loss and VSWR is achieved >-20dB and <2 for the resonant frequencies of 3.1GHz, 5.1GHz, 8GHz and 8.8GHz which is also satisfy the S/C/X band frequencies. This antenna shows that unidirectional radiation pattern with efficiency between 45 to 75% and produce moderate gain of overall bandwidth. These features are highly required and suitable for WBAN communication.