Hwang Ruey-Bing Raybeam
Institute of Communications Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, 30050, Taiwan.
Center for mmWave Smart Radar Systems and Technologies, National Chiao Tung University, Hsinchu, 30050, Taiwan.
Sci Rep. 2020 May 22;10(1):8586. doi: 10.1038/s41598-020-65458-3.
This research reports a design method for synthesizing the binary meta-hologram pattern implemented in a leaky waveguide that can radiate the feeding signal toward a prescribed direction. In fact, the obtained pattern is not always a uniform array; it is an almost-periodic one. Statistical analysis of the radiation pattern for imperfect array is then conducted to demonstrate that radiating main-beam angle (ensemble average) is dominated by the average period of a non-uniform array subject to a small perturbation. Additionally,the leaky wave of higher-order space harmonic in a periodic structure is employed to accurately predict the directional radiation including main beam as well as grating lobes.
本研究报告了一种合成二元超全息图图案的设计方法，该图案在泄漏波导中实现，可将馈电信号朝着规定方向辐射。实际上，所获得的图案并不总是均匀阵列；它是一种近似周期性的阵列。然后对不完美阵列的辐射方向图进行统计分析，以证明辐射主波束角度（总体平均值）由受到小扰动的非均匀阵列的平均周期主导。此外，利用周期性结构中高阶空间谐波的泄漏波来精确预测包括主波束和栅瓣在内的定向辐射。
