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Overview of planar monopole antennas for UWB applications

Abstract:

In order to obtain a clear insight into the physical performance of planar monopole antennas, several of them are analyzed by means of the Theory of Characteristic Modes. The investigation is focused on the influence of the planar shape in the impedance bandwidth of the antenna. It will be demonstrated that the impedance bandwidth is extremely dependent on the feeding gap configuration. Next, a printed rectangular planar monopole antenna with two feeding points will be proposed for UWB applications. Preliminary results obtained for this antenna show that it exhibits good radiation behaviour within the UWB frequency range.