Bluetooth/uwb circular patch antenna with dual band notches

Abstract

In this paper, we propose a new planar antenna for Ultra Wide-Band (UWB) and Bluetooth applications with two band notches. The band notch are designed to reject the Worldwide Interoperability for Microwave Access (WiMAX) applications based on the IEEE 802.16 standards for the frequency band 3.3-3.8 GHz and the Wireless Local Area Network (WLAN) applications band that based on the IEEE 802.11 standard for the frequency band of 5.15-5.825 GHz. The antenna consists of a circular patch, co-planner waveguide (CPW) feed line with 50 Ω input impedance, T-strip connected to the top of the patch and complementary circular slot type split ring resonator (SRR) is etched at the bottom edge of the patch. The antenna covers the UWB frequency band (3.1-10.6) GHz beside extra band for Bluetooth frequency range (2.4-2.48) GHz. The characteristics of the designed structure are investigated using finite element method based electromagnetic solver, HFSS. Promising return loss data with good matching, good gain, high efficiency and omni-directional radiation pattern are obtained.