Analysis of NRD waveguide-based components and transitions using the TLM-based modal extraction approach

Ghosh, Biswajit; Simons, N.R.S.; Shafai, L.; Ittipiboon, A.; Pe, A.

doi:10.1109/cjece.2006.259199

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2021

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“…Non-radiative dielectric waveguide (NRD guide) [1] is considered a promising platform because compact millimeterwave circuits can be found thanks to their non-radiative nature. The NRD guide has attracted much attention since Yoneyama et al proposed it, and various NRD guide devices in the millimeter-wave band have been proposed [2,3,4,5,6,7,8,9,10,11,12,13]. In general, NRD guide supports two orthogonal modes referred to LSM 01 and LSE 01 , as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of NRD guide devices using 2D full-vectorial finite element method

Bashir

Morimoto

Iguchi

et al. 2021

IEICE Electron. Express

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In this paper, we propose an optimal design approach based on a concept of mosaic-like structure for achieving high performance NRD devices. In order to improve design efficiency, we employ the recently proposed two-dimensional full vectorial finite element method (2D-FVFEM) which can accurately model 3D structure of NRD as a numerical simulation method. As an optimization method, we employ either direct binary search (DBS) algorithm or genetic algorithm (GA) depending on design problems. In order to show the usefulness of our approach, design examples of crossing and T-branch waveguides are considered and high transmission efficiency greater than 99.9% for crossing waveguide and 49.8%:49.8% for T-branch waveguide is achieved. The numerical results by 2D-FVFEM are verified by 3D-FVFEM.

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