期刊
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
卷 19, 期 8, 页码 1365-1369出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2020.3001079
关键词
Boundary conditions; Electromagnetic scattering; Acoustic beams; Orbits; Electric fields; Physical optics; Orbital angular momentum (OAM); physical optics (PO); scattering; series expansion
资金
- National Science Foundation [61775175, 61601355, 61771378]
- China Postdoctoral Science Foundation [2016M602770]
- National Natural Science Foundation in Shaanxi Province of China [2019JQ-405]
- Postdoctoral Science Foundation in Shaanxi Province
- Fundamental Research Funds for the Central Universities
In this letter, theory concerning scattering of electromagnetic (EM) waves with orbital angular momentum (OAM) is presented, in which a metallic sphere illuminated by OAM waves is adopted to simplify the study. Based on the series expansion and the physical optics (PO) methods, expressions of incident and scattered OAM waves are obtained. To get the expansion coefficients of the scattered fields, boundary conditions and Debye potentials are applied to establish the relationship between incident and scattered fields. Besides, a full EM wave simulation of the scattered field has been accomplished by the computer simulation technology (CST), the measurement of scattered field is done in an anechoic chamber. The simulated results are in good consistency with numerical calculations, demonstrating the interaction between the OAM EM waves and the metallic target sphere effectively. This letter also paves the way for research on scattering of complex targets of OAM waves, and for future studies on target detection.
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