Overview On Functional Materials for Frequency Tunable Antennas

We report the integration of different kind of materials with improved and adapted properties within antenna designs. In this framework, an overview of three frequency tunable antennas will be presented. Two of them are based on radiating slot elements integrating a Ba 2/3 Sr 1/3 TiO 3 (BST) -based tunable capacitance and therefore present a continuous tunability for the first one while the second one is integrating a VO 2 -based switch for a discrete tuning. The third design presented in this paper propose a frequency reconfigurable composite GeTe-metal patch antenna operating at the millimeter-waves (24– 30 GHz) whose resonant frequency can be tuned and repeatedly changed upon the application of successive laser pulses.