Design and Simulation of Multiband Microstrip Patch Antenna for Mobile Communications
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Date
2006-09
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Addis Ababa University
Abstract
In this thesis work a single band microstrip patch antenna having a narrow operating
bandwidth around the GSM900 band is designed. Theoretical analysis and design was
performed by the Finite Difference Time Domain (FDTD) method based on the
electromagnetic field solver Empire software.
To achieve the multiband antenna that can operate well in the: GSM (Global systems for
mobile communication, 890-960 MHz), DCS (Digital cellular systems, 1710-1880 MHz),
PCS (Personal Communication services, 1850-1990MHz), and UMTS (Universal Mobile
Telecommunications Systems, 1920-2170MHz) bands. One needs to fine-tune the
microstrip element to get dual band (GSM900 and GSM1800 bands) operation and to get
a third or more operating band, one need to apply a shorted parasitic patch that is
electromagnetically
coupled to the main radiator. The multiband antenna posses 14-dB around the GSM 900
band of operation and greater than 8-dB return loss with bandwidths enough to cover the
intended higher operating bands. As the proposed antenna can achieve such wide
operating bandwidth with relatively low profile, it is very suitable for multi-band mobile
communication handsets.
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Keywords
Global systems, Digital cellular systems, Personal Communication