Abstract
In this letter, a new moment method using helical segments is presented to model Normal Mode Helical Antenna (NMHA). Using this method, the NMHA can be modeled by a few segments. The current distributions and radiation patterns of some NMHAs are calculated. A comparison is made between results obtained using this helical segment algorithm and a linear segment algorithm, and the results of the two algorithms agree fairly well. When calculating the impedance matrix [Z], all the elements of the matrix can be obtained by only calculating a few elements with the application of the symmetric and periodic characteristics of the NMHA. Therefore, the CPU time and the memory storage are significantly reduced, with the accuracy and speed enhanced.
References
K. Fujimoto, J. R. James, Mobile Antenna Systems Handbook, Boston, Artech House, 1994, 211–216.
R. F. Harrington, Field Computation by Moment Method, New York: Macmillan, 1968, Chapter 4.
G. J. Burke, A. J. Poffio, Numerical electromagnetics code (NEC)—Method of moments, Rep. UCID 18834, Lawrence Livermore Lab., CA, Jan. 1981.
N. J. Champagne, et al., The use of curved segments for numerically modeling thin wire antennas and scatterers, IEEE Trans. on AP, AP-40(1992)6, 682–689.
Y. Hiroi, K. Fujimoto, Practical usefulness of normal mode helical antenna, IEEE, AP-S International Symposium, Japan, 1976, 238–241.
K. Fujimoto, A. Henderson, K. Hirasawa, J. R. James, Small Antennas, Letchworth, Hertfordshire, England, Research Studies Press LTD, 1987, 59–75.
Author information
Authors and Affiliations
About this article
Cite this article
Ji, Y., Sun, B. & Liu, Q. A new moment method for the fast and accurate analysis of normal mode helical antennas. J. of Electron.(China) 18, 355–358 (2001). https://doi.org/10.1007/s11767-001-0051-2
Issue Date:
DOI: https://doi.org/10.1007/s11767-001-0051-2