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A Low Profile, Top-loaded Monopole Antenna with Four Small Posts

This article describes a low profile, wideband, top-loaded monopole antenna with four small posts. A post-type monopole is used to enhance the impedance matching. This provides a low radiation resistance within the usable band. Four small posts lead to...
Monopole antennas are used in mobile communications. A monopole antenna is a very simple and efficient radiating element. 1 The simple whip and monopole antenna are attractive for use in mobile handsets and repeater applications because of their omni-directional characteristics, simple structure and the inherent 2:1 size reduction over...
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