A New Compact Ultra Wideband Printed Monopole Antenna with Reduced Ground Plane and Band Notch Characterization

In this paper, a printed monopole antenna with reduced ground plane has been presented as a candidate for use in ultra-wideband applications. The monopole antenna structure is a nearly square shaped with m-slot embedded in it. A 50 Omega microstrip line is used to feed the proposed antenna. The proposed antenna has been supposed to be etched using a substrate with relative permittivity of 4.6 and thickness of 1.6 mm. Modeling and performance evaluation of the proposed antenna have been carried out using a method of moments based EM simulator, IE3D. Results show that the proposed antenna has a compact size of 20 mm x 25 mm. The resulting antenna has been found to possess an impedance bandwidth, for voltage standing-wave ratio less than 2, covering the required impedance bandwidth for UWB applications with 5/6 GHz band notch characteristics. Simulation results show that the lower frequency is primarily determined by the monopole radiating element perimeter, while the slot has an effective role to allocate the position of the band notch. A parametric study has been conducted to provide more understanding of the effects of antenna parameters on its performance. Besides the reasonable performance, the simple structure of the proposed antenna will make it an attractive choice for the antenna designers.