Effective constitutive parameters of a sparse medium containing randomly distributed chiral spheres

• Published in: IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229) Vol. 3; pp. 322 - 325 vol.3
• Main Authors: Nanbu, Y., Wei Ren, Matsuoka, T., Mitsuc
• Format: Conference Proceeding
• Language: English; Japanese
• Published: IEEE 2001
• Subjects: Dielectric constant; Educational institutions; Electromagnetic analysis; Electromagnetic propagation; Electromagnetic scattering; Frequency estimation; Integral equations; Particle scattering; Propagation losses; Quantum cellular automata
• ISBN: 9780780370708; 0780370708
• DOI: 10.1109/APS.2001.960097

Studies on the analysis of the effective properties of chiral mixtures have become of great interest in electromagnetic (EM) theory and material science. In general, when a coherent wave propagates through a chiral mixture containing randomly distributed chiral particles in a background medium, it is attenuated by scattering, even if particles in the mixture are lossless ones. Therefore the effective propagation constant becomes a complex value. We have analyzed the effective constitutive parameter and propagation constant for a sparse medium containing randomly distributed chiral spheres embedded in an achiral background medium by using our previously reported method (see Tateiba, M., IEICE Trans. Electron., vol.E78-C, p.1357-65, 1995). The method is based on an unconventional multiple scattering theory by which wave scattering can be systematically treated in a medium whose dielectric particles are randomly displaced from a uniformly ordered spatial distribution. The results computed here have been compared with those of the Maxwell-Garnett (MG) method and Foldy's approximation, by changing the volume fraction and dielectric constant of chiral spheres.