Generation of OAM Radio Waves Using Circular Vivaldi Antenna Array

被引：55

作者：

Deng, Changjiang ^{[1
]}

Chen, Wenhua ^{[1
]}

Zhang, Zhijun ^{[1
]}

Li, Yue ^{[1
]}

Feng, Zhenghe ^{[1
]}

机构：

[1] Tsinghua Univ, State Key Lab Microwave & Digital Commun, Beijing 100084, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION | 2013年 / 2013卷

基金：

国家高技术研究发展计划(863计划);

关键词：

ORBITAL ANGULAR-MOMENTUM; OPTICAL COMMUNICATIONS; SPACE;

D O I：

10.1155/2013/847859

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper gives a feasible and simple solution of generating OAM-carrying radio beams. Eight Vivaldi antenna elements connect sequentially and fold into a hollow cylinder. The circular Vivaldi antenna array is fed with unit amplitude but with a successive phase difference from element to element. By changing the phase difference at the steps of 0, +/- 45 degrees, +/- 90 degrees, +/- 135 degrees, and 180 degrees, the OAM radio beam can be generated with mode numbers 0, +/- 1, +/- 2, +/- 3, and 4. Simulations show that the OAM states of +/- 2 and +/- 3 are the same as the traditional states, while the OAM states of 0, +/- 1, and 4 differ at the boresight. This phenomenon can be explained by the radiation pattern difference between Vivaldi antenna and tripole antenna. A solution of distinguishing OAM states is also proposed. The mode number of OAM can be distinguished with only 2 receivers.

引用

页数：7

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