Design aspects of UWB printed elliptical monopole antenna with impedance matching

Printed elliptical monopole antenna PEMA has been designed to cover the UWB frequency range. The design procedure of this antenna is accomplished by two stages; Firstly, the PEMA has been designed according to some suggested and known formulas. Secondly, two impedance matching (IM) techniques are suggested to improve the designed antenna by moving the locus of the input impedance towards the center of the Smith chart. Simulation results showed that this orientation of the impedance locus leads to very wide operating frequency range 2.83~13.7 GHz, which exceeds the UWB requirements, as well as good gain and efficiency.