光电工程, 2018, 45 (10): 180108, 网络出版: 2018-12-18  

液晶光学相控阵的改进型口径拓展方法及远场特性分析

The realizable method for large diameter liquid crystal optical phased array and the analysis of its far-field characteristics
作者单位
1 电子科技大学光电科学与工程学院,四川 成都 610054
2 电子科技大学物理学院,四川 成都 610054
摘要
天线通光口径是液晶光学相控阵的重要技术指标,本文在多子阵并行驱动和两级器件级联方法(PAPA)的基础上,提出改进型的i-PAPA 方法,通过对COM 电极进行分区域驱动,在单个相控阵天线上实现大口径相控光束控制,具备单器件工作、插损低等优点。通过数值仿真分析,结果表明:相控阵天线后的近场相位分布连续;当指向角度在0°到+6°范围内,远场衍射效率和指向角度的数值关系呈现平滑单调下降,衍射效率均大于48%;当指向角度在0°到+3°范围内,衍射效率均大于80%。
Abstract
The optical aperture of the antenna is an important technical indicator of the liquid crystal optical phased array. Based on the multi-subarray parallel driving and two-level device cascade method (PAPA), in this paper, an improved i-PAPA method was proposed. Large area phased beam control is realized on a single phased array antenna by subdivision of the COM electrodes, and it has the advantages of single device operation and low insertion loss. Through numerical simulation, the results show that the antenna near field phase has continuous distribution; when the point angle varies from 0 degrees to +6 degrees, the far-field diffraction efficiency drops smoothly and monotonously as the point angle increases, the diffraction efficiency is greater than 48%; When the point angle varies from 0 degrees to +3 degrees, the diffraction the efficiency is greater than 80%.

卓儒盛, 汪相如, 贺晓娴, 吴亮, 周庄奇. 液晶光学相控阵的改进型口径拓展方法及远场特性分析[J]. 光电工程, 2018, 45(10): 180108. Zhuo Rusheng, Wang Xiangru, He Xiaoxian, Wu Liang, Zhou Zhuangqi. The realizable method for large diameter liquid crystal optical phased array and the analysis of its far-field characteristics[J]. Opto-Electronic Engineering, 2018, 45(10): 180108.

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