Analysis of a reconfigurable multi-Band monopole antenna

Abstract

This work deals with analysis of a monopole and frequency reconfigurable E-shape patch antenna using FR-4 substrate. The first step concerns modification of a published reconfigurable antenna due to difference in physical properties of the used substrate and the one at our disposal. These appropriate modifications have been performed on the antenna dimensions and on the stripline width so that the modified structure fits the original antenna band characteristics. In the second step, which concerns the main contribution of this work, a parametric analysis of the first structure focusing on the slot positions is achieved. The analysis ended up with nine (9) antenna geometrical configurations each one operating in four (4) reconfigurable modes. These antennas fulfill and satisfy various applications. One of these antenna configurations -operating in one single-band and three dual band reconfigurable modes- has been considered for further analysis. Prototypes of the modified original antenna as well as the one selected in the second part have been fabricated and their reflection coefficients in open switch positions mode measured where good agreements with simulated results have been obtained.