Printed Fork Shaped Dual Band Monopole Antenna for Bluetooth and UWB Applications with 5.5 GHz
WLAN Band Notched Characteristics
Sanjeev Kumar Mishra
Rajiv Kumar Gupta
Avinash R. Vaidya
In this article, a compact microstrip-fed printed dual band antenna for Bluetooth (2.4-2.484 GHz) and UWB (3.1-10.6 GHz) applications with WLAN (5.15-5.825 GHz) 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 50 mm (Lsub) × 24 mm (Wsub) × 1.6 (H) mm and fed by a 50 Ω microstrip line. The proposed antenna has S11 ≤ -10 dB over 2.18-2.59 GHz, Bluetooth band, 3.098-5.15 GHz and 5.948-11.434 GHz, UWB band with WLAN band notch. The structure exhibits nearly omnidirectional radiation patterns, stable gain, and small group delay variation over the desired bands.