Contents I. Introduction
Reconfigurable antennas have attracted the attention of researchers due to their flexibility and potential properties for the next generations of wireless networks [1]. They allow reconfiguring not only the antenna frequency resonance, but also its bandwidth, radiation pattern, and polarization [1]–[3]. There are basically four reconfigurable techniques [3]: mechanical reconfiguration, electrical reconfiguration using p-i-n diodes, optical reconfiguration, and structures built with liquid crystal.
