M. Y. Ismail and  M. Inam,  Design of Liquid Crystal Based Tunable Reflectarray Antenna Using Slot Embedded Patch Element Configurations.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2014, vol. 94(10). 1556 - 1561
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/9999435.