Time-Domain Field and Scattering Parameter Computation in Waveguide Structures by GPU-Accelerated Discontinuous-Galerkin Method

Waveport modeling for the DGTD simulation of electromagnetic devices

“…These equations can be discretized and solved numerically with a section along the z-direction. 8 can be calculated from an inner product between the true field and the modal field on the surface of the waveport, such as…”

“…Compared to the popular finite difference time-domain (FDTD) method, the DGTD can be applied directly to unstructured tetrahedral meshes for a more accurate geometrical modeling. Coupled with the ability to conduct a transient analysis, perform a broadband characterization, and model nonlinear media and its unique advantages of adaptive hp-refinement and local time stepping 6 and a high parallel efficiency, 7,8 the DGTD method is ideally suited for numerical simulation of electromagnetic devices such as microwave, millimeter-wave, and optical devices and various antennas and circuits. 9,10 In the simulation of electromagnetic devices, an accurate modeling of waveguide ports, which allows a port to launch a desired excitation into a device and absorb all the outgoing waves, is very important because most of electromagnetic devices contain input and output ports.…”

“…Compared to the popular finite difference time‐domain (FDTD) method, the DGTD can be applied directly to unstructured tetrahedral meshes for a more accurate geometrical modeling. Coupled with the ability to conduct a transient analysis, perform a broadband characterization, and model nonlinear media and its unique advantages of adaptive h p ‐refinement and local time stepping and a high parallel efficiency, the DGTD method is ideally suited for numerical simulation of electromagnetic devices such as microwave, millimeter‐wave, and optical devices and various antennas and circuits…”

Acceleration Techniques for Analysis of Microstrip Structures

“…[12] realized FDTD method on computer clusters. There are also examples of the use of graphic processing unit (GPU) instead of a CPU to solve electromagnetic problems: Potratz et al in [18] use FEM in conjunction with GPU to calculate scattering parameters of waveguide structures, and Livesey et al in [19] apply GPU and CUDA technology to accelerate FDTD calculations. Motuk et al in [20] presented implementing of FDM on a multiprocessor architecture on a FPGA device.…”

GPU-based calculations in electromagnetic wave diffraction problems

“…GPU-based computing has become especially popular in recent years. In the paper [2] GPU is used to calculate scattering parameters of waveguide structures. In the paper [3] the acceleration techniques for analysis of microstrip structures is discussed, calculations were made on a computer cluster and GPU.…”