Dyadic Green´s function of multilayer cylindrical closed and sector-structures for waveguide, microstrip-antenna, and network analysis

A clear and systematic method to derive the spectral- and space-domain dyadic Green´s function of arbitrary cylindrical multilayer and multiconductor structures is proposed. The derivation is either done for a circumferentially closed or a cylindrical sector structure, which is bounded by electric or magnetic walls in an azimuthal direction. The solution for the dyadic Green´s function in the spectral domain is obtained via an equivalent circuit. Relations between the spectral and space domains for the dyadic Green´s functions are derived using eigensolution expansions. Finally, the dyadic Green´s function is applied to the problem of finding the propagation constants of the two-layer dielectric rod.