China
Africa
Explore chapters and articles related to this topic
Foundation, Progress and Future of Photonics, Plasmonics and Information Optics
Published in Arpan Deyasi, Pampa Debnath, Asit K. Datta, Siddhartha Bhattacharyya, Photonics, Plasmonics and Information Optics, 2021
Pampa Debnath, Arpan Deyasi, Siddhartha Bhattacharyya
An accurate and precise depiction of a specific problem has been offered by Maxwell’s equations in addition to particular boundary conditions. Most of the practical problems related to EM are partly resolved by considering simplified assumptions providing explication with few applications before the arrival of intelligent computers. Exact analysis of a system was only feasible by constructing and experimenting many prototypes, which was extortionate and time-consuming. Numerical analysis of Maxwell equations became feasible after the invention of intelligent computers in the year of 70s. The electromagnetic problems of different types can be analyzed and solved using a computer, therefore gives rise to a new branch termed as ‘computational electromagnetics’ [47–51]. Since structures have different shapes and materials, there was no best technique to solve all issues with the highest perfection and shortest computational time. Therefore, several techniques have to be taken into consideration where each one has distinct features in terms of precision, accurateness, effectiveness and complexity to implement [51–57]. A bulky and complicated assembling has been investigated using nowadays with CAD (computer-assisted design) tools. The time for developing the prototype has been reduced by this robust package and it is also cost-effective.
Introduction
Published in Özlem Özgün, Mustafa Kuzuoğlu, ®-based Finite Element Programming in Electromagnetic Modeling, 2018
The most common methods used in electromagnetic modeling are shown in Fig. 1.1. Other than these classical methods, a number of variations or combinations of these methods (i.e., hybrid methods such as boundary integral finite element method, boundary element method, etc.) have been developed during the advancement of computational electromagnetics.
A Novel Method for Predicting Crosstalk in Lossy Twisted Pair Cable Based on Beetle Antennae Search and Implicit Wendroff FDTD Algorithm
Published in Electromagnetics, 2021
Jianming Zhou, Shijin Li, Wei Yan, Yanxing Ji, Zhaojuan Meng, Yang Zhao, Xingfa Liu
For TPC, it is difficult to directly obtain its overall p.u.l parameter matrix. The usual method is to treat it as a series of short parallel transmission lines cascaded to achieve crosstalk voltages, and this is very similar to the principle of FDTD. However, the traditional leapfrog differential format of FDTD will have stability problems and will take a long time (Brancik 2012). Therefore, this paper chooses IWFDTD method, the implicit wendroff difference format also belongs to a finite difference time domain method of computational electromagnetics. It is an unconditionally stable difference format. The time step and space step are not limited by the stability conditions. Therefore, the computational efficiency of solving multi-conductor transmission line equations is greatly improved compared with the traditional difference scheme (Wu et al. 2019).