A Design of Multiband Antenna using Main Radiator and Additional Sub-Patches for Different Wireless Communication Systems

Abstract

A design of compact printed multiband Microstrip antenna for the different wireless communication systems is proposed. The antenna comprises of a main radiating patch and some additional sub patches which is fed by a microstrip line feeding. This configuration is designed to operate with the center frequencies of 1.52GHz, 1.86GHz, 2.7GHz, 3.32GHz and 4.05 GHz with achievable bandwidths of 6%, 4.3%, 3.7%, 7% and 8.4%, respectively. These five bands supports for the applications of GSM1800, GPS, WIMAX I (2.7 - 2.8GHz), WIMAX II (3.3-3.4GHz), and Fixed Satellite Services. In this work, Reflection co-efficient for each band (S11= -17.16dB for 1.5GHz, S11 = -14.75dB for 1.87GHz, S11 = -13.89dB for 2.7GHz, S11= -21dB for 3.32GHz, S11 = -33.98dB for 4.05GHz), VSWR, and Radiation patterns are simulated using Ansoft HFSS. Antenna is fabricated using ELEVEN LAB then reflection coefficients and VSWR values of the proposed antenna are measured by using the network analyzer. Simulated results are good agreement with practical results.