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A Circuit-Based Wave Port Boundary Condition for the Nodal Discontinuous Galerkin Time-Domain Method
| Content Provider | MDPI |
|---|---|
| Author | Zhu, Shichen Shi, Yan Ban, Zhenguo |
| Copyright Year | 2022 |
| Description | Waveguide-like transmission line (WLTL) structures, including rectangular waveguides, circular waveguides, and coaxial lines, have been widely used in microwave engineering. Determining how to efficiently model WLTLs has become vital for the design of various WLTL-based devices. In this paper, a circuit-based wave port boundary condition (CWPBC) is developed and applied in the discontinuous Galerkin time-domain (DGTD) method to accurately simulate these structures for the first time. In the CWPBC, modal voltages and currents of a WLTL are defined, and circuits based on modal voltages and currents are introduced. By co-simulating the modal circuit and the WLTL modeled using the DGTD method, various modal fields can be excited in the WLTL, and at the same time, the WLTL can be terminated without reflections. No extra costs or approximations are used in the proposed CWPBC, and there is no requirement of either the extension of the computational domains widely used in perfectly matched layer (PML) termination or the longitudinal field continuity used in the reported DGTD method. The proposed method can easily obtain the postprocessing parameters, including S-parameters and port power. Numerical results, including rectangular waveguide filters, circular waveguide horns, and coaxial-fed electromagnetic bandgaps (EBG), are given to validate the effectiveness of the proposed CWPBC. |
| Starting Page | 1842 |
| e-ISSN | 20799292 |
| DOI | 10.3390/electronics11121842 |
| Journal | Electronics |
| Issue Number | 12 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-06-09 |
| Access Restriction | Open |
| Subject Keyword | Electronics Imaging Science Circuit-based Wave Port Boundary Condition (cwpbc) Discontinuous Galerkin Time Domain (dgtd) Modal Circuit Co-simulation |
| Content Type | Text |
| Resource Type | Article |
