A Novel Dual Band Hexagonal Antenna for Bluetooth and Uwb Applications With Single Band Notched

Abstract

This paper  presents a  regular hexagonal antenna for ultra wide bandwidth (UWB). Then this antenna is modified to obtain  a dual band with single band notched.The Bluetooth band is integrated in ultrawideband (UWB)  when   the antenna  is loaded by  pair of  inverted 𝛤-shaped strips.To avoid interference with the uwb systems , the wireless local area network of  5.72–5.825 GHz (IEEE 802.11a)  is notched by incorporating a complementary split ring resonator (SRR) slot  within the hexagonal  shaped  . The operating frequency ranges of the proposed antenna are 2.22 GHz - 2.52 GHz  and 3.5 GHz - 10 GHz, which covers Bluetooth (2.4 GHz - 2.484 GHz) and UWB (3.1 GHz - 10.6 GHz) band, besides the range of  Wlan (5.72 GHz - 5.825 GHz)  with return loss more  than 10 dB. The performance of the antenna is simulated and optimized by CST Microwave Studio and validated against using Ansoft HFSS . Surface current distributions is used to analyze the effects of the slot and strips.  The antenna shows  an acceptable gain over both Bluetooth and UWB bands. In the band notched regions, the gain reduces from its normal value to about 4 dBi at 5.75GHz.