期刊名称：International Journal on Electrical Engineering and Informatics
印刷版ISSN：2085-6830
出版年度：2013
卷号：5
期号：4
DOI：10.15676/ijeei.2013.5.4.5
出版社：School of Electrical Engineering and Informatics
摘要：The design and performance optimization of X-band reconfigurablereflectarray antennas have been discussed in this paper concentrating mainly on thephase characteristics. Liquid crystals based substrates and slot embedded patch elementshave been proposed as two different techniques for the design of reflectarrays withfrequency tunability characteristics. Reflectarray patch elements constructed onanisotropic liquid crystal substrate are proposed to be employed as a dynamic phasecontrol strategy for terrestrial systems. A detailed analysis of dynamic phase range andfrequency tunability with respect to dielectric anisotropy is presented for two differentanisotropic liquid crystal substrate materials. The investigated liquid crystals substratesprovided a maximum reduction of 14.1% in volume for reflectarray design at 10 GHz.Moreover rectangular slots on the patch elements are shown to offer a maximumfrequency tenability of 1.7GHz. The Finite Integral Method (FIM) validated bywaveguide scattering parameter measurements demonstrated a dynamic phase range of314° and a volume reduction of up to 24.36%.
