Generation of Plane Spiral OAM Waves Using Traveling-Wave Circular Slot Antenna

Plane spiral orbital angular momentum (OAM) wave is a new form of OAM-carrying electromagnetic wave that propagates along the transverse direction. A traveling-wave circular slot antenna that can generate plane spiral OAM waves is developed and experimentally demonstrated in this letter. The antenna...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2017, Vol.16, p.8-11
Main Authors: Zhang, Zhuofan, Zheng, Shilie, Jin, Xiaofeng, Chi, Hao, Zhang, Xianmin
Format: Article
Language:English
Subjects:
Antenna measurements
Antenna radiation patterns
Directive antennas
Electromagnetic waveguides
Plane spiral orbital angular momentum
Slot antennas
Spirals
transverse propagation
traveling-wave antenna
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Summary:Plane spiral orbital angular momentum (OAM) wave is a new form of OAM-carrying electromagnetic wave that propagates along the transverse direction. A traveling-wave circular slot antenna that can generate plane spiral OAM waves is developed and experimentally demonstrated in this letter. The antenna is excited by a 90° hybrid coupler. In order to ensure that the OAM waves are propagating along the transverse plane, a ring horn is added outside the antenna. A prototype with OAM states l = ±3 for 10-GHz operation is fabricated and measured. The near-field phase distributions clearly indicate the azimuth phase shifting, and the radiation patterns show the characteristic of transverse propagation, respectively. The proposed antenna provides a novel approach to implement an OAM wireless communication link that has no phase singularity or divergence problem.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2016.2552227