A Hybrid Spectral-Element Finite-Difference Time-Domain Method for Electromagnetic Simulation

Bao, Huaguang; Ding, D. Z.; Chen, R. S.

doi:10.1109/lawp.2017.2711001

Cited by 16 publications

(5 citation statements)

References 16 publications

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“…In this paper, Equations ( 2)-( 10) are solved by the proposed mechanic-electric-circuit coupling algorithm based on the FDTD method, which is also solved by the time-domain finite element method 12 in COMSOL. The grid mesh picture is shown in Figure 3.…”

Section: Numerical Simulation Of Baw Filtermentioning

confidence: 99%

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Mechanic–electric–circuit coupling analysis of BAW filter based on FDTD method

Chen,

Li,

Yin

et al. 2023

Micro & Optical Tech Letters

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In this paper, mechanic–electric–circuit coupling algorithm based on the finite‐difference time‐domain (FDTD) method is proposed to analyze a one‐order microwave bulk acoustic wave (BAW) filter. FDTD method is used to solve the coupled mechanic–electric–circuit system equations to obtain the voltage and current at port position of the BAW filter in the time domain. Then S parameters of the BAW filter in the frequency domain are calculated using the Fourier transform. In our work, a one‐order BAW filter consists of two film bulk acoustic resonators (FBARs) by means of series and parallel. These two FBARs in the BAW filter are coupled together through an equivalent electrical connection. Similarly, multiphysical mechanic–electric–circuit analysis of the BAW filter is implemented in the commercial software COMSOL, which is realized by the time‐domain finite element method. The accuracy of the proposed method is verified by comparison with simulation results in COMSOL. In addition, the computational time and memory of the proposed method have obvious advantages over those of COMSOL.

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Section: Numerical Simulation Of Baw Filtermentioning

confidence: 99%

“…Mechanic-electric-circuit coupling contains the electrostatic field-circuit coupling (10) and the electromechanical coupling ( 2)-( 7). These two coupling relations are related by Equations ( 11) and (12).…”

Section: Theory Of Baw Filtermentioning

confidence: 99%

Mechanic–electric–circuit coupling analysis of BAW filter based on FDTD method

Chen,

Li,

Yin

et al. 2023

Micro & Optical Tech Letters

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show abstract

“…To further solve the TM magnetic field's interference on the cab signalling and verify the analysis and calculation of the radiated magnetic field in Section 3, we carry out a finite element electromagnetic simulation on the ANSYS platform. We choose the transient solver in Maxwell 2-D to complete the modelling and simulation of the 5GEB32 three-phase asynchronous motor in the HXN5 diesel locomotive by the following steps: drawing the system model, setting the solution domain, configuring the material library, setting the boundary conditions, setting the excitation source, and dividing the grid (length-based) [40][41][42]. The parameters of the 5GEB32 motor are listed in Table 3.…”

Section: Interference Calculation and Analysismentioning

confidence: 99%

Research on radiated interference from diesel locomotive traction motor to cab signalling

Liu

Yang

Zhao³

et al. 2022

IET Electrical Syst in Trans

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With the railway advancement of speed and load capacity, new high-power diesel locomotives occupy a prominent position. Due to the susceptibility of onboard signal equipment comprised of microelectronic devices, the diesel locomotive's traction motor (TM) may produce serious disturbance to cab signalling, possibly distorting the signal pattern via receiving coils, even resulting in mutation and decoding error of cab signals. However, the existing research studies pay little attention to this electromagnetic interference problem. This paper studies the radiated alternating magnetic field of the TM and interference coupling path to onboard equipment. It first analyses the cab signalling working principle and clarifies the interference mechanism, focussing on the quantitative analysis of the radiated magnetic field and interference electromotive force. Then, based on the ANSYS platform, the finite element method is used to complete modelling, simulation, and verification. Finally, combined with the railway field data, a typical interference case is analysed, verifying that the distorted signal pulses under the radiated magnetic field are the primary cause of decoding failures. This research establishes the quantitative relationship between the traction radiation intensity and the interference amplitude on signals, helping explore the countermeasures, improve the cab signal decoding accuracy, and ensure transportation efficiency.

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“…In [7], a buffer is used to implement the coupling between FDTD and FETD regions. In [8], there is a cubic layer between the SETD region and the FDTD region, and an explicit SETD/FDTD hybrid approach is put forward. Furthermore, an implicit and explicit time integration scheme is proposed to eliminate buffers that can cause an increase in time and memory consumption [9].…”

Section: Introductionmentioning

confidence: 99%

A Fast Prediction Method for the Radio Propagation under the Obstacle Environment

Ma¹,

Wen²,

Zhang³

et al. 2022

PIER C

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To rapidly simulate the forward electromagnetic scattering of multiple obstacles, we propose a new forward scattering prediction model, which can effectively simulate the propagation of electromagnetic waves in a large-scale environment, accurately calculate the scattering of multi-scale structures, and realize multi-region parallel computation. Specifically, the proposed model consists of an obstacle region and a large-scale environment region. To make the model consistent with the real scene quickly and accurately, the time-domain parabolic equation (TDPE) and discontinuous Galerkin time-domain (DGTD) method are employed to simulate the propagation of electromagnetic waves and the scattering of obstacles, respectively. At the same time, each region is equivalent to a linear timeinvariant (LTI) system, and the transfer function of each system is calculated by the discrete Laplace Z-transform to realize multi-region parallel computation. This model can simulate the propagation of the electromagnetic wave in multiple obstacles more quickly under large-scale background than the existing obstacle forward scattering model. Numerical results demonstrate that the proposed model is effective in terms of accuracy and runtime performance.

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A Hybrid Spectral-Element Finite-Difference Time-Domain Method for Electromagnetic Simulation

Cited by 16 publications

References 16 publications

Mechanic–electric–circuit coupling analysis of BAW filter based on FDTD method

Mechanic–electric–circuit coupling analysis of BAW filter based on FDTD method

Research on radiated interference from diesel locomotive traction motor to cab signalling

A Fast Prediction Method for the Radio Propagation under the Obstacle Environment

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