Open AccessReconfigurable meta-mirror for wavefronts control: applications to microwave antennas
Author(s) -
Badreddine Ratni,
André de Lustrac,
GérardPascal Piau,
Shah Nawaz Burokur
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.002613
Subject(s) - varicap , optics , reconfigurable antenna , planar , microwave , wavefront , bandwidth (computing) , materials science , diode , reflector (photography) , beam steering , parabolic antenna , optoelectronics , beam (structure) , computer science , physics , antenna (radio) , radiation pattern , telecommunications , quantum mechanics , capacitance , antenna efficiency , light source , computer graphics (images) , electrode
A planar metasurface composed of electronically tunable meta-atoms incorporating voltage-controlled varactor diodes is proposed as a reconfigurable meta-mirror for wavefronts control in microwave antenna applications. The dispersion responses of the cells are individually tailored in the reconfigurable metasurface so as to overcome the bandwidth limitations of passive metasurfaces and also to control the phase characteristics. By controlling the bias voltage of the varactor diodes on the planar metasurface, the phase characteristics of reflectors can be engineered. The reconfigurable meta-mirror is utilized to implement three different types of reflectors. As such, a reflectarray, a cylindrical parabolic reflector and a dihedral reflector are numerically verified in microwave regime through finite element method. Moreover, experimental measurements are performed on a fabricated prototype to validate the proposed device. Frequency agility, beam deflection and beam focusing are the main functionalities demonstrated from the proposed reconfigurable meta-mirror.