Generation of Wideband Antenna Performance by [Z] and [Y] Matrix Interpolation in the Method of Moments
Designing antennas for modern radar and communications applications often requires the evaluation of the antenna’s ultra-wide band (UWB) operation capabilities. Identifying the appropriate electromagnetic modeling tools for UWB antennas can be challenging, since such antennas come in a wide-variety of configurations that range from thin-wire types to complex structures such as spirals, bow-ties, etc. The triangular surface patch method of moments (MoM) formulation1,2 is one popular modeling approach. The surface mesh allows flexibility in modeling detailed antenna features. Since the elements of the MoM impedance matrix, or [Z], must be recomputed for each new frequency, the computation of antenna performance over an wide frequency range can take a long time.
KeywordsInput Impedance Impedance Matrix Antenna Performance Matrix Interpolation Admittance Matrix
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- 1.S. M. Rao, D. R. Wilton, and A. W. Glisson, “Electromagnetic scattering by surfaces of arbitrary shape,” IEEE Trans. Antennas Propagat., vol. AP-30, pp. 409–418, May 1982.Google Scholar
- 2.S.-U. Wu and D. R. Wilton, “Electromagnetic scattering and radiation by arbitrary configurations of conducting bodies and wires,” Technical Document 1325, University of Houston. Applied Electromagnetics Laboratory, Dept. of Electrical Engineering, Aug. 1988.Google Scholar
- 3.E. H. Newman and D. Forrai, “Scattering from a microstrip patch,” IEEE Trans. Antennas Propagat., vol. AP-35, pp. 245–251, Mar. 1987.Google Scholar
- 4.K. L Virga and Y. Rahmat-Samii, “Wide-band evaluation of communications antennas using [Z] matrix interpolation with the method of moments,” 1995 IEEE AP-S Intl. Symposium Digest, pp. 1262–1264, Newport Beach, CA, June 1995.Google Scholar
- 5.E. H. Newman, “Generation of wide-band data from the method of moments by interpolating the impedance matrix,” IEEE Trans. Antennas Propagat., AP-36, pp. 1820–1824, Dec. 1988.Google Scholar
- 6.T. K Sarkar, K. R. Siarkiewicz, and R. F. Stratton, “Survey of numerical methods for solution of large systems of linear equations for electromagnetic field problems, ” IEEE Trans. Antennas Propagat., vol. AP-29, pp. 847–856, Nov. 1981.Google Scholar
- 7.F. X. Canning, “Direct solution of the EFIE with half the computation, ” IEEE Trans. Antennas Propagat., vol. AP-39, pp. 118–119, Jan. 1991.Google Scholar
- 8.G. F. Herrmann, “Note on interpolational basis functions in the method of moments, ” IEEE Trans. Antennas Propagat., vol. AP-38, pp. 134–137, Jan. 1990.Google Scholar
- 9.T. W. Nuteson, K. Naishadham, and R. Mittra, “Spatial interpolation of the moment matrix in electromagnetic scattering and radiation problems, ” 1993 IEEE AP-S Intl. Symposium Digest, pp. 860–863, Ann Arbor, MI, June 1993.Google Scholar
- 10.G. Vecchi, P. Pirinoli, L. Matekovits, and M. Orefice, “Reduction of the filling time of method of moments matrices, ” 11th Annual Review of Progress in Applied Computational Electromagnetics, pp. 600–605, Monterery, CA, Mar. 1995.Google Scholar
- 13.A. F. Peterson, “Higher-order surface patch basis functions for EFIE formulations, ” 1994 IEEE AP-S Intl. Symposium Digest, pp. 2162–2165, Seattle, WA, June 1994.Google Scholar
- 15.K. Hirasawa and M. Haneishi, Analysis, Design and Measurement of Small Low Profile Antennas, Artech House, 1992.Google Scholar