A microwave transmission line courseware based on multiple 1-D FDTD method on mobile devices

Yang, Zaifeng; Tan, Eng Leong

doi:10.1109/apcap.2015.7374359

Cited by 10 publications

(9 citation statements)

References 2 publications

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“…Note that the differential equations in (1) are different and not reducible from the 3-D, 2-D or 1-D Maxwell's equations. They are also different from the equations used for uncoupled transmission lines in [12], [15], [16].…”

Section: M1-d Cl-fdtd Methodsmentioning

confidence: 89%

“…Hence, it is worth demonstrated to students for comparison with the directional coupler. For branch line coupler, the EM wave propagation can be simulated using the conventional explicit M1-D FDTD method for multiple (uncoupled) transmission lines and/or stubs [12], [16]. To further enhance its efficiency, the unconditionally stable fundamental alternating direction implicit (FADI) FDTD method [20] is adopted to allow time step larger than the stability constraint.…”

Section: Teaching and Learning Of Branch Line Couplermentioning

confidence: 99%

“…In [15], EM computation on mobile devices allows interactive visualization of wave propagation in userconfigurable transmission line circuits to reinforce various transmission line concepts. This has been made possible using our multiple one-dimensional finite-difference time-domain (M1-D FDTD) method [12], [16], which bypasses the more computationally intensive full-wave 3-D or 2-D FDTD method [17]. Furthermore, it is unlike previous purely 1-D FDTD method that may be over simplistic and not too practical.…”

Section: Introductionmentioning

confidence: 99%

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Mobile Teaching and Learning of Coupled-Line Structures: The multiple-1D coupled-line finite-difference time-domain method

Tan

Heh

2020

IEEE Antennas Propag. Mag.

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In this article, mobile teaching and learning of coupled line structures using multiple one-dimensional coupled line finite-difference time-domain (M1-D CL-FDTD) method are presented. The formulation of M1-D CL-FDTD method applicable for coupled line structures is provided. The method bypasses the more computationally intensive full-wave 3-D method and it is well-suited for implementation on mobile devices. Several mobile apps are developed to provide interactive visualization of EM wave propagation in coupled line structures. Such visualization allows the underlying resonating and coupling mechanisms to be elucidated clearly and improves students' understanding of coupled line theories. Mobile teaching and learning of various coupled line structures including coupled transmission lines, coupled line bandpass filter, directional coupler and branch line coupler are demonstrated and discussed.

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Section: M1-d Cl-fdtd Methodsmentioning

confidence: 89%

Section: Teaching and Learning Of Branch Line Couplermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mobile Teaching and Learning of Coupled-Line Structures: The multiple-1D coupled-line finite-difference time-domain method

Tan

Heh

2020

IEEE Antennas Propag. Mag.

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“…Exploiting the wide accessibility of mobile devices, several educational mobile apps have been created for enhanced teaching and learning of electromagnetics [9][10][11][12][13][14]. They provide touch-based interactivity and real-time EM+circuit simulations as well as 2-D/3-D visualizations of wave phenomena.…”

Section: M1-d Fdtd Methods For Em Educational Mobile Appsmentioning

confidence: 99%

“…We have developed several educational mobile apps, e.g., MuStripKit, EMpolarization, EMwaveRT, etc. (some on App/Play Store) [9][10][11][12][13][14], which are incorporated with innovative CEM that could run efficiently on mobile devices (smartphones/ipads, supplementable with 3-D displays). Exploiting the wide affordances of mobile devices, these mobile apps are useful for quick initial design, analysis and seamless teaching/learning anytime, anywhere.…”

Section: Introductionmentioning

confidence: 99%

Fundamental Implicit FDTD Schemes for Computational Electromagnetics and Educational Mobile Apps (Invited Review)

Tan¹

2020

PIER

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This paper presents an overview and review of the fundamental implicit finite-difference time-domain (FDTD) schemes for computational electromagnetics (CEM) and educational mobile apps. The fundamental implicit FDTD schemes are unconditionally stable and feature the most concise update procedures with matrix-operator-free right-hand sides (RHS). We review the developments of fundamental implicit schemes, which are simpler and more efficient than all previous implicit schemes having RHS matrix operators. They constitute the basis of unification for many implicit schemes including classical ones, providing insights into their interrelations along with simplifications, concise updates and efficient implementations. Based on the fundamental implicit schemes, further developments can be carried out more conveniently. Being the core CEM on mobile apps, the multiple one-dimensional (M1-D) FDTD methods are also reviewed. To simulate multiple transmission lines, stubs and coupled transmission lines efficiently, the M1-D explicit FDTD method as well as the unconditionally stable M1-D fundamental alternating direction implicit (FADI) FDTD and coupled line (CL) FDTD methods are discussed. With the unconditional stability of FADI methods, the simulations are fast-forwardable with enhanced efficiency. This is very useful for quick concept illustrations or phenomena demonstrations during interactive teaching and learning. Besides time domain, many frequency-domain methods are well-suited for further developments of useful mobile apps as well.

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Demonstration of electromagnetic polarization app on iPad

Tan

Heh

2017

2017 IEEE International Conference on Computational Electromagnetics (ICCEM)

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A microwave transmission line courseware based on multiple 1-D FDTD method on mobile devices

Cited by 10 publications

References 2 publications

Mobile Teaching and Learning of Coupled-Line Structures: The multiple-1D coupled-line finite-difference time-domain method

Mobile Teaching and Learning of Coupled-Line Structures: The multiple-1D coupled-line finite-difference time-domain method

Fundamental Implicit FDTD Schemes for Computational Electromagnetics and Educational Mobile Apps (Invited Review)

Demonstration of electromagnetic polarization app on iPad

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