@article{oai:kitami-it.repo.nii.ac.jp:02000488,
 author = {Tahir Bashir and Keita Morimoto and Akito Iguchi and Yasuhide Tsuji and Tatsuya Kashiwa and Shinji Nishiwaki},
 issue = {4},
 journal = {International Journal of Numerical Modelling: Electronic Networks, Devices and Fields},
 month = {Jan},
 note = {In this paper, a class of broadband non-radiative dielectric (NRD) guide devices based on digital material are presented using optimal design technique. The NRD guides to be discussed here include low crosstalk crossing waveguide, T-branch, 90°-bend, and Z-bend waveguide. To reduce the computational efforts, we employ recently proposed 2D-FVFEM as simulation method. Based on digital material optimization strategy, binary genetic algorithm is implemented to obtain an optimal device structure in the design region. To achieve the desired properties, we introduce a unique one-two symmetric conditions for the structural optimization. Hence, the designed crossing, T-branch, 90°-bend, and Z-bend, respectively, achieve high transmission efficiencies greater than 99.5%, 49.5%:49.5%, 99.4%, and 99.9% at operating frequency 60 GHz, and, furthermore, achieve broadband property as well in the frequency ranges of 58 –64, 58–62, 59–62, and 59–63 GHz. The numerical results of 2D-FVFEM are also verified by 3D-FVFEM. Owing to excellent performances, the proposed NRD guide devices can be useful in a lot of millimeter-wave circuit and system applications.},
 title = {Optimal design of broadband non-radiative dielectric guide devices using binary genetic algorithm and 2D-FVFEM},
 volume = {35},
 year = {2022}
}