Single-frequency computational imaging using OAM-carrying electromagnetic wave
Single-frequency computational imaging using OAM-carrying electromagnetic wave
复制标题
使用 OAM 携带电磁波的单频计算成像
DOI：
10.1063/1.4983358
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发表时间：
2017-05
影响因子：
3.2
通讯作者：
Zhang Xianmin
中科院分区：
文献类型：
--
作者：
Chen Yiling;Zheng Shilie;Jin Xiaofeng;Chi Hao;Zhang Xianmin
介绍了一种利用轨道角动量(OAM)载波实现单频微波成像的概念。OAM波的正交性非常适合于压缩感知，使得能够在有限测量的情况下重建稀疏场景。从理论和实验两方面论证了一种能够产生OAM载波的行波圆形缝隙天线。利用所设计的OAM天线辐射的一组照明方向图作为测量模式，获取回波信号与OAM模式的关系，并基于计算成像方法重建场景。该微波成像方案在没有机械扫描或波束形成技术的情况下，通过单频的原理验证实验得到了验证。
A concept for single-frequency microwave imaging using orbital angular momentum (OAM) carrying wave is introduced. The orthogonality of OAM waves, which is well suited for compressed sensing, enables the reconstruction of a sparse scene with limited measurements. A traveling wave circular slot antenna is demonstrated to generate the OAM carrying wave theoretically and experimentally. Using a set of illumination patterns radiated from the designed OAM antennas as the measurement modes, the echo signals versus OAM modes are acquired and the scene is reconstructed based on computational imaging methods. This microwave imaging scheme is verified by a proof-of-principle experiment at a single frequency without mechanical scanning or beam-forming technologies.