Design of Multiband Microstrip Antenna for GSM, Wifi, and Wimax Application

Abstract

In recent years, there has been a big and rapid development in the communication and network industry. To be more specific, there has been a big and tremendous growth in the technologies of wireless local area networks (WLAN), the worldwide interoperability for microwave access (WiMAX) and GSM communications. For this reason, there is an increasing demand for miniature, low profile, low-cost, and easy to fabricate antennas with a broad range of frequency bands. Having almost all these features, microstrip antennas attracted the interest of researchers to delve into the study, investigation, and design of this type of antennas. In this project, a simple structure, low-cost, and low-profile U-slotted microstrip patch antenna has been designed, fabricated, measured and implemented to operate at three desired frequencies, that is, 1.8GHz (GSM), 2.44GHz (WLAN), 3.5GHz (WiMAX). In the design process, the effects of several parameters on the performance of the antenna have been studied, utilizing an international standard antenna software called CST Studio Suite. The length and width of the patch, the length, widths, and the gaps of the Ushaped slots were all implemented in the design simulation. The antenna was first measured as far as return loss, using a network analyzer, provided by the national operator; Al-Wataniya Mobile. The radiation patterns were measured in-house, utilizing an antenna measurement system. Then the fabricated antenna was tested in a simple WLAN network, where performance against various distances is verified and measured.