A Low-Cost WLAN Band Notched Planar Patch Antenna for Ultra-Wideband Applications

Abstract

A low-cost low-profile compact planar patch antenna is demonstrated for ultra-wideband (UWB) applications with Wireless Local Area Network (WLAN) band-notched characteristics. A U-shaped slot is etched into the microstrip line to block the current flow into the radiating elements for the entire WLAN (5.15-5.825GHz) band and consequently, the band-notched characteristic is achieved. To validate the concept, the surface current distribution is considered and studied. The proposed antenna is printed on a low-cost FR-4 substrate and has overall low-profile (26×26×0.8 mnr’), It has expected gain and more than 86% radiation efficiency for the entire UWB band expect the WLAN band. Therefore, the presented WLAN band notched UWB antenna would be an appropriate front-end component for future WLAN EMI free high-speed UWB wireless communication.