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Millimeter‐Wave Digital Coding Metasurfaces Based on Nematic Liquid Crystals

Qiang Wang

State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing, 210096 China

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Xin Ge Zhang

State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing, 210096 China

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Han Wei Tian

State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing, 210096 China

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Wei Xiang Jiang

Corresponding Author

E-mail address: [email protected]

State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing, 210096 China

E‐mails:

[email protected]

;

[email protected]

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Di Bao

State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing, 210096 China

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Hao Lin Jiang

State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing, 210096 China

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Zhang Jie Luo

State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing, 210096 China

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Li Ting Wu

State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing, 210096 China

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Tie Jun Cui

Corresponding Author

E-mail address: [email protected]

State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing, 210096 China

E‐mails:

[email protected]

;

[email protected]

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First published: 09 September 2019

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Citations: 1

Abstract

Metasurfaces provide an unprecedented capability in manipulating electromagnetic waves. In this work, a millimeter‐wave (mmW) digital coding metasurface based on nematic liquid crystals (NLCs) is proposed and realized. By tuning the bias voltage loaded on the NLCs, the effective permittivity of the NLCs substrate is changed, thus providing different reflection phases. As a proof of concept, mmW beam splitting and mmW beam steering at mmW frequencies are demonstrated using a single metasurface platform. The experimental results are in good agreement with numerical simulations. The proposed digital coding metasurfaces have promising applications on planar mmW devices, such as multi‐beam antennas, beam‐scanning antennas, and wave controllers.

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