PRINTED FORK SHAPED DUAL BAND MONOPOLE ANTENNA FOR BLUETOOTH AND UWB APPLICATIONS WITH 5.5 GHZ WLAN BAND NOTCHED CHARACTERISTICS

Abstract

In this article, a compact microstrip-fed printed dual band antenna for Bluetooth (2.4{2.484GHz) and UWB (3.1{ 10.6GHz) applications with WLAN (5.15{5.825GHz) band-notched characteristics is proposed. It is demonstrated that dual band characteristics with desired bandwidth can be obtained by using a fork shaped radiating patch, whereas, band-notched characteristics can be obtained by etching two L-shaped slots and two symmetrical step slots on the rectangular ground plane. The proposed antenna is simulated, fabricated and tested. The structure is fabricated on a low cost FR4 substrate having dimensions of 50mm (Lsub) £ 24mm (Wsub) £ 1:6 (H)mm and fed by a 50› microstrip line. The proposed antenna has S11 • i10dB over 2.18{2.59GHz, Bluetooth band, 3.098{5.15GHz and 5.948{11.434GHz, UWB band with WLAN band notch. The structure exhibits nearly omnidirectional radiation patterns, stable gain, and small group delay variation over the desired bands.