COMPLEX CHIRAL ADMITTANCE OF CONDUCTING MULTITURN HELICES EMBEDDED INA DIELECTRICALLY LOSSY MEDIUM IN THE QUASI-STATIONARY APPROXIMATION

An analysis is made of electromagnetic activity due to the chirality o f conducting multiturn helical objects in the quasi-stationary approxi mation. The complex chiral admittance xi(c) is computed analytically f or a lossy helix embedded in a dielectrically lossy host material as a function of the helix dimensions and medium properties using a parall el-wire transmission line model. The condition for chiral losslessness of an electromagnetically lossy chiral is obtained, and it is shown t hat irrotativity is not possible in the quasi-static approximation. Th e dependence of xi(c) on helix diameter, gauge, pitch, and length is d emonstrated. With the aid of this model, electromagnetic rotation and circular dichroism are calculated for lossy chirals and compared with measured data.