Small size planar monopole antenna for high speed UWB applications

Abstract

In modern wireless communication, UWB applications are becoming very popular because of reliable, secure and high speed data transmission over smaller distances. In these applications, it is very much essential to have small size printed antennas for transmitting and receiving of UWB signals. However, designing small size printed antennas with good performance is quite a challenging task. In this paper, we discuss performance characteristics of a simple and small size planar monopole antenna for UWB applications. Proposed UWB antenna is covering 10dB return loss frequencies ranging from 2.72GHz to 12.68GHz. This design is achieving a maximum gain of 5.24dBi at 9.25GHz and a maximum efficiency of 96.45% at 3.1GHz. This paper also discusses a reason of enhancement in gain and efficiency reduction at higher frequencies along with UWB antennas requirements. Proposed design dimensions are 30mm×30mm×1.6mm with FR-4 as a dielectric substrate. Because of small size and good performance, proposed UWB antenna can be used in many applications like 4G, wireless body area networks, spectrum sensing in cognitive radio, wireless telemetry, telemedicine and RF energy harvesting. Experimental result shows that, there is a good agreement between the simulated and measured antenna results.