期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 63, 期 4, 页码 1530-1536出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2015.2393885
关键词
Circular traveling-wave antenna; orbital angular momentum (OAM); spin angular momentum (SAM); transmission characteristics; twisted wave
资金
- National Basic Research Program of China (973 program) [2014CB340005, 2014CB340001]
- Natural Science Foundation of China [61371030]
A traveling-wave circular loop antenna with its phase distribution along the circle of l phi is demonstrated to generate the twisted radio wave. Theoretical formulations of its radiation fields are deduced in the cylindrical coordinate system and used to analyze its transmission characteristics, such as the radiation patterns, the evolution of the polarization states, and the angular momentum modes including the orbital angular momentum (OAM) modes and the spin angular momentum (SAM) modes. The prototype of a practical configuration for such antenna is proposed and conducted to validate the theoretical results. This theoretical analysis is applicable not only to radio waves but also to the whole electromagnetic spectrum.
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