A Compact Fractal Based Printed Monopole Antenna for Wi Bro, Wi Max and UWB Applications
Mahmood T. Yassen1, Jawad K. Ali2, Ali J. Salim3, Seevan F. Abdulkareem4, Ali I. Hammoodi5, Mohammed R. Hussan6
1Mahmood T. Yassen, Microwave Research Group, Department of Electrical Engineering, University of Technology, Baghdad, Iraq,
2Jawad K. Ali, Microwave Research Group, Department of Electrical Engineering, University of Technology, Baghdad, Iraq,
3Ali J. Salim, Microwave Research Group, Department of Electrical Engineering, University of Technology, Baghdad, Iraq,
4Seevan F. Abdulkareem, Microwave Research Group, Department of Electrical Engineering, University of Technology, Baghdad, Iraq,
5Ali I. Hammoodi, Microwave Research Group, Department of Electrical Engineering, University of Technology, Baghdad, Iraq,
6Mohammed R. Hussan, Microwave Research Group, Department of Electrical Engineering, University of Technology, Baghdad, Iraq,
Manuscript received on September 27, 2013. | Revised Manuscript received on October 13, 2013. | Manuscript published on October 30, 2013. | PP: 347-351  | Volume-3, Issue-1, October 2013. | Retrieval Number:  A2131103113/2013©BEIESP

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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: In this paper a compact Koch fractal based printed monopole antenna has been introduced as a candidate for use in applications in which the Wi Bro, Wi Max, ISM and UWB services are integrated. The monopole radiating element has a rectangular shape with two slots cut from each corner. In addition, the sides of the radiator, except that of the feed line direction, have been modified to be in the form of Koch fractal curve of third iteration. A small rectangular slot has been made in the ground plane beneath the feed line. The antenna has been fed with an offset 50 Ohm microstrip transmission line. Both the antenna and the feed line have been printed on an FR-4 substrate with a thickness of 1.59 mm and relative permittivity of 4.4. Modeling and performance evaluation of the proposed antenna have been carried out using a method of finite integration technique (FIT) based EM simulator, CST Microwave Studio. Simulation results show that the proposed antenna offers an impedance bandwidth, for return loss ≤ –10 dB in the range of 2.3 – 11.5 GHz. Furthermore, the proposed antenna radiating element has a compact size of 20 × 20 mm2.
Keywords: Compact fractal antenna, Microstrip transmission line, Printed monopole antenna, Wireless applications.