Design of broadband polarization converter for terahertz waves
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College of Photoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

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    Abstract:

    A broadband reflective polarization converter is proposed. The unit cell of polarization converter is composed of a single-split resonant ring, a double-split resonant ring, a dielectric substrate and a metallic ground. The simulated results show that the polarization converter can convert x-polarized waves into y-polarized waves and obtain a broadband polarization conversion from 0.501 0 THz to 1.390 0 THz with the polarization conversion ratio (PCR) beyond 80% at normal incidence. Moreover, the surface current distributions are investigated to explain the polarization conversion mechanism. Finally, a good agreement is achieved between simulated and measured results. The polarization converter can be applied in terahertz imaging, communication and stealthy technology.

    Reference
    [1] Li J, Zhang A, Joines W T and Liu QH, A miniaturized circularly polarized microstrip antenna with bandwidth enhancement, IEEE International Symposium on Antennas and Propagation, 41 (2016).
    [2] Ryzhkov A V, Giangrande S E, Melnikov V M and Schuur T J, Journal of Atmospheric & Oceanic Technology 22, 1138 (2004).
    [3] Maltsev A, Perahia E, Maslennikov R, Sevastyanov A, Lomayev A and Khoryaev A, IEEE Antennas & Wireless Propagation Letters 9, 413 (2010).
    [4] Meissner T and Wentz F J, IEEE Transactions on Geoscience & Remote Sensing 44, 506 (2006).
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PAN Wu, SHEN Da-jun, YAN Yan-jun. Design of broadband polarization converter for terahertz waves[J]. Optoelectronics Letters,2018,14(6):434-437

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History
  • Received:May 11,2018
  • Revised:June 11,2018
  • Online: March 26,2019
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