Compact planar rectangular monopole antenna for Bluetooth and UWB Applications

Abstract

In this article a novel slot loading technique is proposed for integrating Bluetooth band to UWB antenna. The presented coplanar waveguide (CPW) fed rectangular-shaped monopole antenna has symmetrical meandered slots on ground plane. The proposed dual band antenna operates at 2.4–2.5 GHz for WLAN/Bluetooth band and 3.5–10.9 GHz for UWB band. The antenna has a compact electrical size of 0.12λ0 × 0.19λ0 × 0.01λ0 where λ0 is wavelength at 2.4 GHz. The proposed antenna exhibits appreciable gain, omnidirectional and doughnut-shape radiation pattern in H-plane and E plane respectively, for entire operating bandwidth. The designed antenna exhibits satisfactory performance in time domain analysis with group delay less than 1.5 ns for obtained UWB band. Finally, a prototype is fabricated and measured results are in close agreement with simulated results.