VOL. 10, NO 22, DECEMBER, 2015 ISSN 1819-6608 ARPN Journal of Engineering and Applied Sciences ©2006-2015 Asian Research Publishing Network (ARPN). All rights reserved. www.arpnjournals.com 17265 DESIGN OF RECTANGULAR MICROSTRIP PATCH ANTENNA USING STEPPED CUT AT FOUR CORNERS FOR BROADBAND/ MULTIBAND APPLICATION Waheeb Salim Abdulrab, Md Rafiqul Islam and Mohamed Hadi Habaebi Departmental of Electrical and Computer Engineering in International Islamic University of Malaysia, Kuala Lumpur, Malaysia E-Mail: waheebtashan@yahoo.com ABSTRACT Design of rectangular microstrip patch antenna (RMPA) using stepped cut at four corners for broadband/multiband application is presented in this paper. Stepped cut at four corner technique is used in order to increase the bandwidth and gain of the antenna. Design and simulation of Modified rectangular microstrip patch antenna are done by CST Microwave Studio software. Four stages are presented for the proposed broadband MRMPA design. The first stage is a single mode RMPA and by increasing steps at the corner of the patch antenna a dual band, multiband and broadband are obtained. As the steps are increased, the antenna's operating bandwidth is also enhanced. The frequencies ranges of this design vary from 900MHZ to 3.5 GHz. Hence this design can be used for GSM (900MHz/1.5GHz), WiFi (2.4GHz), LTE (2.6GHz) and WiMax (3.5 GHz) applications. Keywords: long term evolution, modified rectangular microstrip patch antenna, rectangular microstrip patch antenna. INTRODUCTION Antenna is the interface of the wireless communication systems to the channel which is the most sensitive part [1] Patch antennas (Microstrip antennas) are one of the most popular antennas due to their low profile, conformable, easy, inexpensive, small size and versatile in terms of realization and are thus been widely used in a various useful applications [2], [3]. In contrast microstrip patch antenna (MPA) has some disadvantages such as low gain and narrow band. Most bandwidth Figure-1 shows the rectangular microstrip patch antenna (RMPA) configuration, including a dielectric substrate located between a radiating patch and a ground plane. Generally, the patch is prepared of conducting material such or copper in any shape. Most of the previous contributions in this research area were to increase the BW of MPAs [4] by increasing the substrate thickness [5]. Array microstrip antenna which has been proved to successfully increase Figure-1. Structure of microstrip patch antenna. the antenna gain, antenna efficiency, and beam scanning directivity [6]. In order to simplify analysis and performance prediction, the patch is generally configured as square, rectangular, circular, triangular, and elliptical in shape [7]. This paper is organized as follows: section 1 is an introduction, section 2 is a concept of stepped cut at four corners, section 3 is a design and simulation of proposed broadband/multiband antenna system which contains Antenna Configuration, Results and Discussion, section 4 is conclusion and finally the references which I have cited.