ANTENNA MODEL FOR CONDUCTIVE OMEGA-PARTICLES

Analytical models for small Omega-shaped conductive particles in free space or embedded in isotropic materials are presented and discussed. The electromagnetic analysis is based on the antenna theory for circul ar loop antennas and dipole wire antennas. Analytical expressions for the polarizabilities valid in the frequency area covering the two lowe r resonances are given. Mutual coupling between two portions of the pa rticle: the loop and the straight wire is considered in terms of the m utual impedance, which is analytically calculated with the use of the induced electromotive force method. Approximate analytical expressions are compared with numerical simulations and are seen to be in good ag reement. The results can be used in analytical modelling of omega and chiral composite materials and in the antenna theory.