Title :
Chiral properties of lossy n-turn helices in the quasi-stationary approximation using a transmission-line model
Author :
Arnaut, L.R. ; Davis, L.E.
Author_Institution :
Department of Electrical Engineering and Electronics, The University of Manchester Institute of Science and Technology, PO Box 88, Manchester M60 1QD, UK Tel: +44 61 236 3311; Fax: +44 61 228 7040; e-mail: arnaut@uk.ac.umist.csc
Abstract :
Electromagnetic activity due to the chirality of n-turn helical objects is investigated in the quasi-stationary approximation. The complex chiral admittance ¿c is computed for a lossy helix embedded in a lossy host medium as a function of the helix dimensions and medium properties using a parallel-wire transmission-line model. The condition for chiral losslessness of an electromagnetically lossy chiral is obtained. With the aid of this model the electromagnetic rotation and circular dichroism are predicted for lossy chirals. The variation of¿c with helix diameter, gauge, pitch and free length for a lossy helix at resonance is demonstrated.
Keywords :
Admittance; Concurrent computing; Dielectric loss measurement; Dielectric losses; Electromagnetic modeling; Electronic mail; Magnetic losses; Propagation losses; Resonance; Transmission lines;
Conference_Titel :
Microwave Conference, 1993. 23rd European
Conference_Location :
Madrid, Spain
DOI :
10.1109/EUMA.1993.336833
