Chen Peng, Wang Dan, Wang Lihua, Liu Lu, Gan Zongsheng
School of Ocean Information Engineering, Jimei University, Xiamen, 361000, China.
College of Information and Communication Engineering, Harbin Engineering University, Harbin, 150000, China.
Sci Rep. 2024 Jul 18;14(1):16646. doi: 10.1038/s41598-024-67714-2.
This paper proposed a frequency reconfigurable antenna that utilizes a multilayer structure of liquid crystal (LC) material. This antenna design incorporates a three-layer stacked structure to create an LC-injected cavity. The inverted microstrip line structure is designed to be in contact with the LC, serving as both a radiating element and a bias electrode. A parasitic patch is placed at the top of the antenna to enhance bandwidth. To prevent interference with DC and RF sources, a bias tee is integrated into the microstrip line input. Experimental results demonstrate that the proposed antenna exhibits excellent impedance matching and stable radiation patterns within the operational frequency range. By comparing the simulated performance of the existing LC antenna with our proposed design, the bandwidth is tripled at a center frequency of 30.3 GHz. In addition, the effective area of the proposed reconfigurable antenna (154 mm) is 24.6% of the area of the previous reconfigurable antenna (625 mm).
本文提出了一种利用液晶（LC）材料多层结构的频率可重构天线。该天线设计采用三层堆叠结构来创建注入液晶的腔体。倒置微带线结构设计为与液晶接触，既作为辐射元件又作为偏置电极。在天线顶部放置一个寄生贴片以增强带宽。为防止对直流和射频源产生干扰，在微带线输入端集成了一个偏置三通。实验结果表明，所提出的天线在工作频率范围内表现出优异的阻抗匹配和稳定的辐射方向图。通过将现有液晶天线的模拟性能与我们提出的设计进行比较，在中心频率30.3GHz时带宽增加了两倍。此外，所提出的可重构天线的有效面积（154平方毫米）是先前可重构天线面积（625平方毫米）的24.6%。
