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5 - The application of the FEKO and NEC-2 codes to thin-wire antenna modelling

Published online by Cambridge University Press:  05 July 2014

David B. Davidson
David B. Davidson
Affiliation:
University of Stellenbosch, South Africa
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Summary

Introduction

With the theoretical background now established, one is in a position to start using commercial and public domain MoM programs intelligently. In this chapter, we will discuss primarily the application of the commercial code FEKO for antenna modelling, but will also discuss the use of the public domain code NEC-2 in this regard. Other than FEKO, few commercial programs (other than some proprietary NEC-2 extensions) provide good support for modelling thin-wire antennas, the topic of this chapter; such antennas are still very widely used indeed. For commercial programs, material is usually available to assist novice users to get started with the codes. Hence we will not describe the basic concepts of entering the geometry of the problem, including the source, and specifying parameters such as operating frequency and radiation patterns, since these vary from program to program, indeed quite often from release to release, and are usually quite well documented by the suppliers. However, in the case of NEC-2, some comments are in order.

NEC-2 is a “card driven” program, dating back to the days of “decks” of punched cards. A NEC model is described by a geometry file, usually with a .nec extension. An example is given in Fig. 5.1. If using NEC in this form, one must obtain a copy of the user manual [1].

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Computational Electromagnetics for RF and Microwave Engineering , pp. 166 - 200
Publisher: Cambridge University Press
Print publication year: 2010

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References

[1] G. J., Burke and A. J., Poggio, “Numerical electromagnetics code (NEC)-method of moments; Part III: User's guide.” Lawrence Livermore National Laboratory, CA, UCID18834, January 1981.Google Scholar
[2] D. B., Davidson, “Parallel processing revisited: a second tutorial,” IEEE Antennas Propagat. Mag., 34, 9–21, October 1992.Google Scholar
[3] J.J.H., Wang, Generalized Moment Methods in Electromagnetics. New York: Wiley, 1991.Google Scholar
[4] D. J. Janse, van Rensburg and D. A., McNamara, “On quasi-static source models for wire dipole antennas,” Microwave Optical Technol. Lett., 3, 396–398, November 1990.Google Scholar
[5] W. L., Stutzman and G. A., Thiele, Antenna Theory and Design. New York: Wiley, 2nd edn., 1998.Google Scholar
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[7] J.D., Kraus and R.J., Marhefka, Antennas for All Applications. Boston, MA: McGraw-Hill, 3rd edn., 2002.Google Scholar
[8] A. C., Ludwig, “Wire grid modelling of surfaces,” IEEE Trans. Antennas Propagat., 35, 1045–1048, September 1987.Google Scholar
[9] T. T., Wu and R. W. P., King, “The cylindrical antenna with nonreflecting resistive loading,” IEEE Trans. Antennas Propagat., 13, 369–373, May 1965.Google Scholar
[10] T. T., Wu and R. W. P., King, “Correction: the cylindrical antenna with nonreflecting resistive loading,” IEEE Trans. Antennas Propagat., 13, 998, November 1965.Google Scholar
[11] J. G., Maloney and G. S., Smith, “A study of transient radiation from the Wu-King resistive monopole - FDTD analysis and experimental measurements,” IEEE Trans. Antennas Propagat., 41, 668–676, May 1993.Google Scholar

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