Transmission Characteristics of a Twisted Radio Wave Based on Circular Traveling-Wave Antenna

Author

Shilie Zheng ; Xiaonan Hui ; Xiaofeng Jin ; Hao Chi ; Xianmin Zhang

Author_Institution

Dept. of Inf. Sci. & Electron. Eng., Zhejiang Univ., Hangzhou, China

Volume

63

Issue

4

fYear

2015

fDate

Apr-15

Firstpage

1530

Lastpage

1536

Abstract

A traveling-wave circular loop antenna with its phase distribution along the circle of lφ 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.

Keywords

angular momentum; antenna radiation patterns; electromagnetic wave polarisation; loop antennas; radiowave propagation; OAM modes; angular momentum modes; antenna radiation patterns; cylindrical coordinate system; electromagnetic spectrum; orbital angular momentum modes; phase distribution; polarization states; radiation fields; transmission characteristics; traveling-wave circular loop antenna; twisted radio wave; Antenna radiation patterns; Cavity resonators; Electric fields; Metals; Polarization; Vectors; Circular traveling-wave antenna; Twisted wave; circular traveling-wave antenna; orbital angular momentum; orbital angular momentum (OAM); spin angular momentum; spin angular momentum (SAM); transmission characteristics; twisted wave;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2015.2393885

Filename

7014288