Open AccessExperimental validation of active holographic metasurface for electrically beam steering
Author(s) -
Kuang Zhang,
Hao Yu,
Xumin Ding,
Qun Wu
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.26.006316
Subject(s) - optics , beam steering , varicap , holography , beam (structure) , microwave , radiation , materials science , planar , optoelectronics , physics , computer science , electrode , capacitance , computer graphics (images) , quantum mechanics
In this paper, a holographic metasurface possessing beam scanning capability at fixed frequency is presented. The desired radiation beam is obtained by using a reference wave to excite a sinusoidally-modulated impedance surface, which is equivalent to the interference pattern between the radiation wave and reference wave. By changing the bias voltage of varactor diodes loaded on the sub-wavelength unit cells, the variation range of the modulated impedance can be tuned, resulting in the change of radiation angle. Both the simulation and experimental results demonstrate that the direction of the radiation beam can be tuned in the range from 23° to 50° at 5.5 GHz. The proposed holographic metasurface shows great potential applications in constructing planar beam scanning antenna for integrated microwave system.