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Aperture efficiency improvement of folded reflectarray using rectangle and split-ring combined element

Aperture efficiency improvement of folded reflectarray using rectangle and split-ring combined element

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In this Letter, the aperture efficiency of a folded reflectarray is improved using a proposed element. This element is designed with a simple structure using a rectangle and split-ring combined structure to obtain a more accurate reflection phase for the folded reflectarray than that of a conventional element in the millimetre wave frequency. Thus, a high aperture efficiency of 55.04% is obtained at 77 GHz. The element design concept and procedure are presented in detail.

References

    1. 1)
      • L. Guo , P. Tan , T. Chio .
        1. Guo, L., Tan, P., Chio, T.: ‘A wideband folded reflectarray using single layered sub-wavelength elements’. European Conf. on Antennas and Propagation, Davos, Switzerland, April 2016.
        . European Conf. on Antennas and Propagation
    2. 2)
    3. 3)
    4. 4)
      • J.G. Jeong , Y.J. Yoon , H.R. Kim .
        4. Jeong, J.G., Yoon, Y.J., Kim, H.R.: ‘Optimal element arrangement of folded reflectarray for high aperture efficiency’. IEEE Int. Symp. on Antennas and Propagation, San Diego, USA, July 2017.
        . IEEE Int. Symp. on Antennas and Propagation
    5. 5)
    6. 6)
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2018.1194
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