Abstract

This paper presents the design and testing of a Wide-band monopole antenna. The proposed antenna consists of a circular patch that is shorted to the ground plane by four copper wires and three copper strips and is fed by a trapezoid-probe at its center. For the patch height and patch radius of 0.0894 and 0.1933 free space wavelengths at 0.725 GHz, this antenna possesses a -20 dB return loss bandwidth of 28.97%, which is 10 times wider than that of similar type of antenna reported in the literature. Also, it has an average gain of 2.42 dBi and monopole-like radiation patterns over this bandwidth. As this antenna has wide impedance bandwidth and relatively small size, it is very suitable for the indoor mobile communication systems.

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