Photonics and Nanostructures - Fundamentals and Applications ( IF 2.7 ) Pub Date : 2021-03-15 , DOI: 10.1016/j.photonics.2021.100918 Sepideh Hashemi , Alireza Yahaghi , Farzad Mohajeri
A broadband reflectarray antenna is proposed for operating at THz frequencies. An array of single-layer elements is composed of gold patches printed on a grounded cyclic olefin copolymer (COC) substrate. The elements are designed to have a smooth and linear phase reflection curve versus element positions. A random hill-climbing (RHC) optimization algorithm is applied to obtain the broadest bandwidth around the design frequency. The proposed antenna shows 3 dB relative bandwidth of 25% ranging from 0.9 to 1.15 THz, and it has a polarization-independent feature and low loss for better reflectarray performance.
中文翻译:
太赫兹频率下基于宽带,偏振独立的反射阵列天线的基于优化的设计
提出了一种宽带反射阵列天线,用于在THz频率下工作。单层元素阵列由印刷在接地的环状烯烃共聚物(COC)基底上的金贴片组成。元件设计成相对于元件位置具有平滑且线性的相位反射曲线。应用随机爬山(RHC)优化算法来获得设计频率附近的最宽带宽。拟议中的天线在0.9至1.15 THz范围内显示3 dB的相对带宽为25%,并且具有偏振无关的特性和低损耗,从而具有更好的反射阵列性能。