Analysis of Multiconductor Transmission Lines Using the CN-FDTD Method

Honarbakhsh, Babak; Asadi, Sareh

doi:10.1109/temc.2020.2987652

Cited by 12 publications

(9 citation statements)

References 33 publications

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“…An algorithm that got solution by the FDTD method on a certain frequency was proposed by Fatih Kaburcuk [23][24][25]. CN-FDTD was applied to analyze the stability and dispersity of a multi-conductor transmission line by Babak Honarbakhsh et al [26]. On the basis of the literature review, CN-FDTD has not been applied for 3D electromagnetic surveying in underground total space.…”

Section: State Of the Artmentioning

confidence: 99%

Forward Modeling of Water-Rich Regions in Mines Based on Unconditional Stability Finite-Difference Time-Domain

Tian¹,

Ma²,

Zhou³

2019

JESTR

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Water bursting in mines remains one of the major disasters that threatens safe coal production. The traditional detection techniques of water-rich regions in mines can no longer meet new safe production standards and requirements. To solve the constraints on the selection of traditional finite-difference time-domain (FDTD) step length by the Courant-Friedrichs-Lewy stability condition, the unconditional stability Crank-Nicolson FDTD (CN-FDTD) algorithm was introduced into the detection of underground total space, aiming to further increase calculation speed and detection accuracy. The boundary condition of the perfectly matched layer (PML) and numerical stability condition for mine detection were analyzed by studying the basic principle of CN-FDTD. Meanwhile, a detection model of underground water-rich regions was constructed. Influences of excitation function, frequency of excitation source, distance between the anomalous body and the interface, and size of the anomalous body on water-rich region detection were analyzed through Wavenology EM and MATLAB simulation by using the forward algorithm. Results demonstrate that given the same conditions, the Ricker wavelet excitation source has better detection effect than the Blackman-Harris Window (BHW) Function, Gaussian and Delta excitation sources. When the anomalous body is 70 m away from the interface, the excitation source with a central frequency of 15 MHz is the best detection frequency. In addition, forward modeling reveals that when the anomalous body is 50 m away from the interface, the echo signals of a 3 cubic metres anomalous body could still be detected clearly. Theoretically, the existence of an anomalous body can be determined through this echo signal, and its location can be determined through imaging. The study verifies the effective application of CN-FDTD in water-rich region detection in mines. In addition, CN-FDTD solves the constraints of traditional FDTD by stability condition and increases the accuracy of water-rich region detection in mines. This study provides certain theoretical references for the accurate detection of water-rich anomalous bodies in mines.

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Section: State Of the Artmentioning

confidence: 99%

Forward Modeling of Water-Rich Regions in Mines Based on Unconditional Stability Finite-Difference Time-Domain

Tian¹,

Ma²,

Zhou³

2019

JESTR

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“…Usually, a conducting wire with a radius far less than its length and the working wavelength can be viewed as thin-wire structure. High-precision numerical methods [4,5] and efficient approximate circuit approaches [3,6,7] have been developed to analyze the coupling problems of thin-wires, where the ground is regarded as an infinite plane for simplifying the model to be easily solved. However, the facilities and devices are actually located in a complicated, large scale, and realistic environment.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Electromagnetic Wave Coupling to Thin-Wire Structures in Terrain Environments Using Hybrid PE/TPIE Method

Zhang

Cheng

Feng

et al. 2019

International Journal of Antennas and Propagation

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Analysis of electromagnetic wave coupling to thin-wire structures plays a very important role in electromagnetic compatibility (EMC). In this paper, a hybrid method, which is integrated parabolic equation (PE) and two-potential integral equation (TPIE), is presented to analyze the coupling problems in terrain environments. To model the realistic scenarios, PE based on the split-step Fourier transform (SSFT) technique is applied to solve the three-dimensional field distribution to obtain the external excitations for the wires. According to the boundary conditions, the high-precision TPIE solved via the moment method (MoM) is developed to simulate the induced currents on the wires. The hybrid method takes the terrain influences into account and provides a more reasonable result compared to the traditional approaches. Numerical examples are given to demonstrate correctness of the proposed method. Simulation experiments of field-to-transmission lines with different frequencies, radiation source heights, conductor radii, and lengths, in a realistic scenario constructed by a digital map, are carried out to investigate the coupling properties.

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“…It is worth mentioning that there is a trade-off between the CPU time and accuracy of the CN scheme; i.e. as Δt increases, the accuracy of solution decreases [31,32]. Therefore, Δt should be selected considerately.…”

Section: Introductionmentioning

confidence: 99%

“…In [32], the efficiency and accuracy of the CN-FDTD method applied to four practical examples are investigated and compared with the LF method and measurements. Here, this method is also efficient when the electromagnetic compatibility (EMC) considerations are of interest.…”

Section: Introductionmentioning

confidence: 99%

Analysis of dual‐gate high electron mobility transistor using an unconditionally stable time domain method

Mayani

Asadi

2018

IET Science, Measurement & Technology

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Analysis of Multiconductor Transmission Lines Using the CN-FDTD Method

Cited by 12 publications

References 33 publications

Forward Modeling of Water-Rich Regions in Mines Based on Unconditional Stability Finite-Difference Time-Domain

Forward Modeling of Water-Rich Regions in Mines Based on Unconditional Stability Finite-Difference Time-Domain

Modeling of Electromagnetic Wave Coupling to Thin-Wire Structures in Terrain Environments Using Hybrid PE/TPIE Method

Analysis of dual‐gate high electron mobility transistor using an unconditionally stable time domain method

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