volume | PIER Journals

Abstract

In this paper, some common misconceptions in several papers dealing with the optimal design of multilayer microwave absorbers are indicated. Specifically, it is emphasized that Chew's recursive formula for the reflection coefficient of multilayer media for the TM polarization corresponds to the magnetic field, not the electric field. It is also emphasized that both TM and TE polarizations should have the same magnitude of the reflection coefficient for the case of normal incidence. Numerical optimal results are also presented and ompared with those existing in the literature.

1. Michielssen, E., J. Sajer, S. Ranjithan, and R. Mittra, "Design of lightweight, broad-band microwave absorbers using genetic algorithms," IEEE Trans. on Microwave Theory and Techniques, Vol. 41, No. 6/7, 1024-1031, June/July 1993.

2. Weile, D., E. Michielssen, and D. Goldberg, "Genetic algorithm design of pareto optimal broadband microwave absorbers," IEEE Trans. on Electromagnetic Compatibility, Vol. 38, No. 3, 518-525, August 1996.
doi:10.1109/15.536085

3. Cui, S., D. Weile, and J. Volakis, "Novel planar electromagentic absorber designs using genetic algorithms," IEEE Trans. on Antennas and Propagation, Vol. 54, 1811-1817, 2006.
doi:10.1109/TAP.2006.875460

4. Jiang, L., J. Cui, L. Shi, and X. Li, "Pareto optimal design of multilayer microwave absorbers for wide-angle incidence using genetic algorithms ," IET Microwave Antennas Propagation, Vol. 3, No. 4, 572-579, June 2009.
doi:10.1049/iet-map.2008.0059

5. Kent, S. and M. Kartal, "Genetic algorithm approach on pyramidal dielectric absorbers," Int. J. of RF and Microwave CAE, Vol. 18, 286-294, 2008.
doi:10.1002/mmce.20291

6. Chamaani, S., S. Mirtaheri, and M. Shooredeli, "Design of very thin wide band absorbers using modified local best particle swarm optimization," AEU- Int. J. Electron Commun., Vol. 62, 549-556, 2008.
doi:10.1016/j.aeue.2007.06.001

7. Goudos, S., "Design of microwave broadband absorbers using a self-adaptive differential evolution algorithm," Int. J. RF and Microwave CAE, Vol. 19, 364-372, May 2009.

8. Chew, W. C., Waves and Fields in Inhomogeneous Media, IEEE Press, NY, 1995.

9. Tvrdik, J., V. Pavliska, and H. Habiballa, Stochastic selfadaptive algorithms for global optimization --- MATLAB and C₊₊ library, http://albert.osu.cz/oukip/optimization/.

10. Omar, A., Q. Bashayreh, and A. Al-Shamali, "Investigation of the effect of obliquely incidence plane wave on a human head at 900 and 1800 MHz," Int. J. of RF and Microwave and CAE, Vol. 20, 133-140, 2010.

Prof. Nihad I. Dib

Dr. Mujahed Asi

Dr. Ayman Sabbah