A hybrid technique combining the FDTD method and the time domain UTD

2005 ◽  
Author(s):  
A. Skarlatos ◽  
R. Schuhmann ◽  
T. Weiland
Keyword(s):  
Time Domain ◽  
Fdtd Method ◽  
Hybrid Technique ◽  
The Time Domain

Research on Interference of Electromagnetic Radiation on Micro-Strip Line

2011 ◽  
Vol 110-116 ◽  
pp. 971-976
Author(s):  
Hong You Wang ◽  
Jin Guang Li
Keyword(s):  
Integrated Circuits ◽  
Time Domain ◽  
Integrated Circuit ◽  
Electromagnetic Compatibility ◽  
Fdtd Method ◽  
Field Calculation ◽  
Strip Line ◽  
The Time Domain ◽  
Radiation Conditions ◽  
Response Feature

Micro-strip line is a kind of transmission line that is the most widely used in microwave integrated circuit. With the development of microwave integrated circuits and the increasing work frequency of the micro-strip line, a higher requirement for its electromagnetic compatibility has been raised. Finite-Difference Time-Domain (FDTD) method has characteristics of good adaptability in the analysis of electromagnetic compatibility issues and superiority in complexity of the structure modeling. For these reasons, this Article uses FDTD method which is widely used in electromagnetic field calculation to analyze the time-domain of micro-strip line, calculates its current and voltage induced in ports and discuss the response feature under different radiation conditions.

scholarly journals Electromagnetic Field Coupling to Overhead Wire Configurations: Antenna Model versus Transmission Line Approach

2012 ◽  
Vol 2012 ◽  
pp. 1-18 ◽  
Author(s):  
Dragan Poljak ◽  
Khalil El Khamlichi Drissi
Keyword(s):  
Electromagnetic Field ◽  
Transmission Line ◽  
Time Domain ◽  
Unit Length ◽  
Fdtd Method ◽  
Domain Analysis ◽  
Wire Antenna ◽  
Field Coupling ◽  
The Wire ◽  
The Time Domain

The paper deals with two different approaches for the analysis of electromagnetic field coupling to finite length overhead wire: the wire antenna theory (AT) and the transmission line (TL) method. The analysis is carried out in the frequency and time domain, respectively. Within the frequency domain analysis the wire antenna formulation deals with the corresponding set of Pocklington integrodifferential equation, while the transmission line model uses the telegrapher's equations. The set of Pocklington equations is solved via the Galerkin-Bubnov scheme of the Indirect Boundary Element Method (GB-IBEM), while the telegrapher’s equations are treated using the chain matrix method and the modal equation to derive per-unit-length parameters. For the case of the time domain analysis AT model uses the space-time Hallen integral equation set, while TL approach deals with the time domain version of the telegrapher’s equations. Hallen equations are handled via time domain version of GB-IBEM, while time domain telegrapher’s equations are solved by using Finite Difference Time Domain (FDTD) method. Many illustrative computational examples for the frequency and time domain response, respectively, for several configurations of overhead wires, obtained via different approaches, are given in this paper.

scholarly journals The application of improved FDTD algorithm based on mode-matching in shielding cavity

2018 ◽  
Vol 232 ◽  
pp. 03030
Author(s):  
Xuelian Gao ◽  
Lingli Kong
Keyword(s):  
Finite Difference ◽  
Time Domain ◽  
Fdtd Method ◽  
Mode Matching ◽  
Electromagnetic Environment ◽  
Matching Method ◽  
Boundary Problems ◽  
Mode Matching Method ◽  
Regular Waveguide ◽  
The Time Domain

Due to the increasing complexity of the electromagnetic environment, the cavity with apertures are used more and more widely in electromagnetic shielding. At present, the time domain finite difference (FDTD) method has a good application effect for the transmission line response problem of a double-layer shield cavity with apertures, but this method usually encounters the boundary problem of semi-open and open areas. Due to the limited computing resources, the truncation of the FDTD region has an impact on the accuracy and speed of the calculation because that is very important. Based on that, this paper puts forward a method of combining mode-matching method with FDTD algorithm, which overcomes the limitation that mode-matching method can only be used for regular waveguide analysis and uses mode-matching method to solve FDTD boundary problems. The improved FDTD algorithm based on mode-matching method enhances the accuracy of the algorithm and guarantees the calculation speed.

Analysis of Microstrip Circuit by Using Finite Difference Time Domain (FDTD) Method

2013 ◽  
Vol 347-350 ◽  
pp. 1758-1762
Author(s):  
Lei Zhang ◽  
Tong Bin Yu ◽  
De Xin Qu ◽  
Xiao Gang Xie
Keyword(s):  
Differential Equation ◽  
Nonlinear Differential Equation ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Fdtd Method ◽  
Transform Domain ◽  
Time Step ◽  
The Time Domain ◽  
Difference Time ◽  
Microstrip Circuit

The microstrip circuit is mostly analyzed in transform domain, because its equivalent circuit equation is often nonlinear differential equation, which is easily analyzed in transform domain relatively, but hardly did in time domain, so the analysis of microstrip circuit is a hard work in time domain. In this paper, the FDTD method is used to analyze the microstrip circuit in time domain, by transforming the nonlinear differential equation into time domain iterative equation, selecting suitable time step, and having an iterative computing, the time domain numerical solution can be solved. The FDTD method analyzing the microstrip circuit provides a new way of thought for analyzing microstrip circuit in time domain.

scholarly journals Analytic Calculation of Transmission Field in Homogeneously Layered Mediums Excited by EMP

2017 ◽  
Vol 2017 ◽  
pp. 1-8
Author(s):  
Dong-yang Sun ◽  
Wei-min Bao ◽  
Xiao-ping Li
Keyword(s):  
Electric Field ◽  
Transmission Coefficient ◽  
Attenuation Coefficient ◽  
Time Domain ◽  
Fdtd Method ◽  
Electromagnetic Theory ◽  
Analytic Calculation ◽  
The Time Domain ◽  
Analytic Derivation

This paper presents an analytic derivation for the time-domain transmission across layered mediums. The transmission coefficient and attenuation coefficient are obtained in the time-domain from general electromagnetic theory. The transmission electric field can be obtained within a few seconds by convolving the coefficients with incident EMP. The results are accordant with the FDTD method, and this approach can deal with the multilayer mediums problem. The limitations of this approach are discussed in this paper.

Sign in / Sign up

Export Citation Format

Share Document