Some weaknesses of delta function testing in method of moments solutions to pocklington-type models of thin-wire structures

2005 ◽  
Author(s):  
L. Pearson ◽  
C. Butler
Keyword(s):  
Method Of Moments ◽  
Delta Function ◽  
Thin Wire ◽  
Function Testing

scholarly journals A hybrid method combining the Time-Domain Method of Moments, the Time-Domain Uniform Theory of Diffraction and the FDTD

2007 ◽  
Vol 5 ◽  
pp. 107-113
Author(s):  
A. Becker ◽  
V. Hansen
Keyword(s):  
Method Of Moments ◽  
Hybrid Method ◽  
Time Domain ◽  
Time Domain Method ◽  
Thin Wire ◽  
Uniform Theory Of Diffraction ◽  
Domain Method ◽  
Inhomogeneous Bodies ◽  
Wire Antennas ◽  
The Time Domain

Abstract. In this paper a hybrid method combining the Time-Domain Method of Moments (TD-MoM), the Time-Domain Uniform Theory of Diffraction (TD-UTD) and the Finite-Difference Time-Domain Method (FDTD) is presented. When applying this new hybrid method, thin-wire antennas are modeled with the TD-MoM, inhomogeneous bodies are modelled with the FDTD and large perfectly conducting plates are modelled with the TD-UTD. All inhomogeneous bodies are enclosed in a so-called FDTD-volume and the thin-wire antennas can be embedded into this volume or can lie outside. The latter avoids the simulation of white space between antennas and inhomogeneous bodies. If the antennas are positioned into the FDTD-volume, their discretization does not need to agree with the grid of the FDTD. By using the TD-UTD large perfectly conducting plates can be considered efficiently in the solution-procedure. Thus this hybrid method allows time-domain simulations of problems including very different classes of objects, applying the respective most appropriate numerical techniques to every object.

A Simulation Exercise in Antenna Analysis Using Mininec

1989 ◽  
Vol 26 (4) ◽  
pp. 355-366 ◽  
Author(s):  
B. A. Austin
Keyword(s):  
Transmission Line ◽  
Method Of Moments ◽  
Simple Procedure ◽  
Wire Antenna ◽  
Thin Wire ◽  
Simulation Exercise ◽  
Or Modelling

The method of moments is used in the form of the MININEC software to analyse a thin wire antenna with lumped lossy loading. As an exercise in antenna simulation or modelling it complements very effectively a simple procedure where the antenna is treated as an opened-out transmission line.

scholarly journals A hybrid method combining the TD-MoM with the TD-UTD to calculate the transient radiation of thin dipoles in presence of a perfectly conducting screen

2005 ◽  
Vol 3 ◽  
pp. 431-436
Author(s):  
A. Becker ◽  
V. Hansen
Keyword(s):  
Frequency Domain ◽  
Method Of Moments ◽  
Hybrid Method ◽  
Time Domain ◽  
Free Space ◽  
Time Domain Method ◽  
Thin Wire ◽  
Uniform Theory Of Diffraction ◽  
The Time Domain ◽  
Conducting Screen

Abstract. A time domain Method of Moments algorithm (TD-MoM) is combined with the time domain version of the Uniform Theory of Diffraction (TD-UTD). By use of the TD-MoM the fields radiated from thin wire structures positioned in free space are determined. The TD-UTD is applied to calculate the fields scattered by a perfectly conducting screen. Both techniques are hybridized by adding possible reflected and diffracted fields in the TD-MoM algorithm and by using the TD-MoM solution to calculate the fields which impinge on to the screen. To show the accuracy of the developed hybrid method, numerical results are compared to results obtained by established frequency domain numerical codes.

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