A Novel dual Band Hexagonal Antenna for Bluetooth and UWB Applications With Single Band Notched

This paper presents a modified hexagonal regular broadband antenna operating from (3.3 GHz - 10.5 GHz) with integrated Bluetooth band and single band notched. The Bluetooth band is integrated in ultrawideband (UWB) structure when the antenna is loaded by a pair of inverted square-shaped strips. To avoid interference with the UWB systems, the wireless local area network(WLAN) of 5.72-5.825 GHz is notched by incorporating a complementary split ring resonator (SRR) slot within the hexagonal shaped. The operating frequencies 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, except the range of W1AN (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. The surface current distribution is used to analyze the effects of the slot and strips. The antenna gain is acceptable over both Bluetooth and UWB bands. In the band notched regions, the gain reduces from its normal value about 4 dBi at 5.75GHz.