Shared aperture metasurface antenna for electromagnetic vortices generation with different topological charges

doi:10.1088/1674-1056/abe37c

中国物理B ›› 2021, Vol. 30 ›› Issue (8): 84101-084101.doi: 10.1088/1674-1056/abe37c

Shared aperture metasurface antenna for electromagnetic vortices generation with different topological charges

He Wang(王贺)^†, Yong-Feng Li(李勇峰), and Shao-Bo Qu(屈绍波)

Department of Basic Sciences, Air Force Engineering University, Xi'an 710051, China

收稿日期:2021-01-07 修回日期:2021-01-18 接受日期:2021-02-05 出版日期:2021-07-16 发布日期:2021-07-23
通讯作者: He Wang E-mail:18066540235@163.com
基金资助:
Project supported by the National Natural Science foundation of China (Grant No. 61971347).

Shared aperture metasurface antenna for electromagnetic vortices generation with different topological charges

He Wang(王贺)^†, Yong-Feng Li(李勇峰), and Shao-Bo Qu(屈绍波)

Department of Basic Sciences, Air Force Engineering University, Xi'an 710051, China

Received:2021-01-07 Revised:2021-01-18 Accepted:2021-02-05 Online:2021-07-16 Published:2021-07-23
Contact: He Wang E-mail:18066540235@163.com
Supported by:
Project supported by the National Natural Science foundation of China (Grant No. 61971347).

摘要/Abstract

摘要： Vortex beams carrying orbital angular momentum (OAM) have aroused great interest of both scientific and engineering communities. Encouragingly, generating OAM with different topological charges in a shared aperture is regarded as a potential route to expanding the communication capacity, which yet is an academic challenging task. In this work, a paradigm of designing metasurface-based shared aperture antenna for generating polarization-dependent vortex beams with distinct topological charges is proposed. Anisotropic unit cells that can tailor different resonance phase profiles in two orthogonal orientations are used to assemble a metasurface reflector. As a proof-of-concept, a planar reflector antenna is designed with two Vivaldi sources, which can generate x- and y-polarized vortex beams with topological charges of l=-1 and l=-2, respectively. Both the simulation results and the measurement results are in good agreement, which demonstrates the feasibility of our design. Significantly, this work provides a new route to achieving vortex beams carrying different topological charges in the same frequency band, which may have potential applications in communication systems.

关键词: metasurface, electromagnetic vortex, antenna, orbital angular momentum

Abstract: Vortex beams carrying orbital angular momentum (OAM) have aroused great interest of both scientific and engineering communities. Encouragingly, generating OAM with different topological charges in a shared aperture is regarded as a potential route to expanding the communication capacity, which yet is an academic challenging task. In this work, a paradigm of designing metasurface-based shared aperture antenna for generating polarization-dependent vortex beams with distinct topological charges is proposed. Anisotropic unit cells that can tailor different resonance phase profiles in two orthogonal orientations are used to assemble a metasurface reflector. As a proof-of-concept, a planar reflector antenna is designed with two Vivaldi sources, which can generate x- and y-polarized vortex beams with topological charges of l=-1 and l=-2, respectively. Both the simulation results and the measurement results are in good agreement, which demonstrates the feasibility of our design. Significantly, this work provides a new route to achieving vortex beams carrying different topological charges in the same frequency band, which may have potential applications in communication systems.

Key words: metasurface, electromagnetic vortex, antenna, orbital angular momentum

中图分类号: (Applied classical electromagnetism)

41.20.-q

41.20.Jb (Electromagnetic wave propagation; radiowave propagation)

He Wang(王贺), Yong-Feng Li(李勇峰), and Shao-Bo Qu(屈绍波). Shared aperture metasurface antenna for electromagnetic vortices generation with different topological charges[J]. 中国物理B, 2021, 30(8): 84101-084101.

He Wang(王贺), Yong-Feng Li(李勇峰), and Shao-Bo Qu(屈绍波). Shared aperture metasurface antenna for electromagnetic vortices generation with different topological charges[J]. Chin. Phys. B, 2021, 30(8): 84101-084101.

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Shared aperture metasurface antenna for electromagnetic vortices generation with different topological charges

Shared aperture metasurface antenna for electromagnetic vortices generation with different topological charges

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