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基于超表面的无磁性材料环行器

邱天硕 王甲富 李勇峰 王军 闫明宝 屈绍波

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基于超表面的无磁性材料环行器

邱天硕, 王甲富, 李勇峰, 王军, 闫明宝, 屈绍波

Magnetless circulator based on phase gradient metasurface

Qiu Tian-Shuo, Wang Jia-Fu, Li Yong-Feng, Wang Jun, Yan Ming-Bao, Qu Shao-Bo
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  • 目前,广泛应用环行器均需要铁氧体材料并外加偏置磁场以达到环行效果,具有重量大,对温度敏感等缺点. 本文基于透射型相位梯度超表面,利用相位梯度超表面的异常折射特性,基于几何光学原理设计了一种无需铁氧体材料和外加磁偏置的环行器. 实验结果说明,在20.8 GHz附近,该器件呈现显著的环行效果. 这种环行器重量显著降低,对温度变化不敏感,提供了一种环行器设计的新思路,具有潜在的应用前景.
    Circulators are widely used microwave components that rely on magnetic materials. They have been a subject of extensively theoretical and experimental development for over 50 years. Nowadays, commercial circulators require ferrite and external bias magnetic field to realize circulation performance. However, ferrite circulators suffer major drawbacks: they are too heavy, incompatible with integrated circuit technologies, expensive, sensitive to temperature, etc. So, it is very hard to further improve the characteristic of traditional ferrite circulator. And it is important to overcome the major drawbacks of the traditional ferrite circulator. In this paper, the anomalous refraction feature of the phase gradient metasurface is utilized to realize nonreciprocal characteristics. Magnetless circulator based on phase gradient metasurface is proposed and then analyzed. The circulator consists of phase gradient metasurfaces and a three-port waveguide. Three metasurfaces are arranged into 60-degree angle with respect to each other. The metasurface shows high efficiency in anomalous refraction. With the help of phase gradient metamaterial, the signal can only be refracted to the next port in rotation along one direction. That makes the circulation performance. To design and optimize the circulator for better circulation performance, the numerical simulations are performed using the full-wave electromagnetic simulator CST Microwave Studio 2013. To verify the design of the circulator based on phase gradient metasurface, the circulator is fabricated using waveguide and metasurfaces. The scattering parameters of the magnetless circulator based on phase gradient metasurface are measured using a vector network analyzer (Agilent N5230 A). The measured S-parameters show that the circulator exhibits good circulation performances at a frequency of 20.8 GHz. At 20.8 GHz, the insertion loss is 0.8 dB. And the return loss and isolation degree can reach -10 dB. In this paper, a new method is used to design the circulators. This work makes it possible to reduce the weight of the device. Moreover, it is also insensitive to temperature. Therefore, we can make a conclusion that the magnetless circulator based on phase gradient metasurface has potential value in application. However, there is still lots of work to do to improve the performance of the circulator. In future work, we will use wideband metasurfaces to broaden the bandwidth, improve the isolation degree, reduce the insertion loss, and reduce the return loss. And free space can be lead into the circulator to reduce the bulk of the circulator and improve the circulation performance.
      Corresponding author: Wang Jia-Fu, wangjiafu1981@126.com;qushaobo@126.com ; Qu Shao-Bo, wangjiafu1981@126.com;qushaobo@126.com
    • Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 61331005, 61501503, 11274389, 11304393, 11504428) and the China Postdoctoral Science Foundation (Grant No. 2015M572561).
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    Grady N K, Heyes J E, Chowdhury D R, Zeng Y, ReitenM T, Azad A K, Taylor A J, Dalvit D A R, Chen H T 2013 Science 34 01304

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    Wei Z Y, Cao Y, Su X P, Gong Z J, Long Y, Li H Q 2013 Opt. Express 21 010739

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    Li Y F, Zhang J Q, Qu S B, Wang J F, Chen H, Xu Z, Zhang A X 2014 Appl. Phys. Lett. 104 221110

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    Yu J B, Ma H, Wang J F, Li Y F, Feng M D, Qu S B 2015 Chin. Phys. B 24 098102

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  • [1]

    Harris V G, Geiler A, Chen Y, Yoon S D, Wu M, Yang A 2009 J. Mag. Mag. Mater. 321 2035

    [2]

    Zuo X, How H, Somu S, Vittoria C 2003 IEEE Trans. Magn. 39 3160

    [3]

    Carignan L P, Yelon A, Mnard D, Caloz C 2011 IEEE Trans. Microwave Theory Tech. 59 2568

    [4]

    Yu N F, Genevet P, Kats M A, Aieta F, Tetienne J P, Capasso F, Gaburro Z 2011 Science 334 333

    [5]

    Aieta F, Genevet P, Yu N, Kats A M, Gaburro Z, Capasso F 2012 Nano Lett. 12 1702

    [6]

    Nathaniel K, Grady N K, Heyes J E, Chowdhury D R, Zeng Y, Reiten M T, Azad A K, Taylor Z A, Dalvit D A R, Chen H T 2013 Seience 340 1304

    [7]

    Li Y F, Zhang J Q, Qu S B, Wang J F, Chen H Y, Xu Z, Zhang A X 2014 Acta Phys. Sin. 63 084103 (in Chinese) [李勇峰, 张介秋, 屈绍波, 王甲富, 陈红雅, 徐卓, 张安学 2014 物理学报 63 084103]

    [8]

    Nader Engheta N 2011 Science 334 317

    [9]

    Ni X, Emani N K, Kildishev A V, Boltasseva A, ShalaevV M 2012 Science 335 427

    [10]

    Grady N K, Heyes J E, Chowdhury D R, Zeng Y, ReitenM T, Azad A K, Taylor A J, Dalvit D A R, Chen H T 2013 Science 34 01304

    [11]

    Wei Z Y, Cao Y, Su X P, Gong Z J, Long Y, Li H Q 2013 Opt. Express 21 010739

    [12]

    Li Y F, Zhang J Q, Qu S B, Wang J F, Chen H, Xu Z, Zhang A X 2014 Appl. Phys. Lett. 104 221110

    [13]

    Yu J B, Ma H, Wang J F, Li Y F, Feng M D, Qu S B 2015 Chin. Phys. B 24 098102

    [14]

    Wang J F, Qu S B, Ma H, Xu Z, Zhang A X, Zhou H, Chen H Y, Li Y F 2012 Appl. Phys. Lett. 101 201104

    [15]

    Zhang X, Tian Z, Yue W, Gu J, Zhang S, Han J, Zhang W 2013 Adv. Mater. 25 4567

    [16]

    Su X Q, Ouyang C M, Xu N N, Cao W, Wei X, Song G F, Gu J Q, Tian Z, O'Hara J F, Han J G, Zhang W L 2015 Opt. Express 23 027152

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出版历程
  • 收稿日期:  2016-03-07
  • 修回日期:  2016-06-27
  • 刊出日期:  2016-09-05

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