Analysis of a Conformal Archimedean Spiral Antenna Printed Within Layered Dielectric Cylindrical Media Using the Method of Moments

A method of moments analysis of a conformal Archimedean spiral antenna is presented where the spiral is printed on a grounded cylindrical substrate with a superstrate. The layered cylindrical media are modelled using dyadic Green's functions in conjunction with novel asymptotic expressions to accelerate convergence. The results are validated against the limiting case of an equivalent planar structure as well as those obtained using commercial software.