Radiation pattern of cylindrical-wraparound chirostrip antennas

Abstract

In this paper, a cylindrical‐wraparound microstrip antenna flush mounted to the upper surface of a chiral substrate is analyzed. The chiral substrate is wrap fabricated around a conducting core cylinder. Dyadic Green's functions for such a cylindrical structure are formulated in terms of cylindrical vector wave eigenfunctions. The expression of the radiation field for the wraparound is derived. The saddle‐point technique is used to approximate the field expression. The effects of the chiral admittance and substrate thickness on the radiation patterns are shown and discussed. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 21: 211–214, 1999.