Fast analysis of flush-mounted cylindrical microstrip structures

This paper presents the application of the discrete mode matching (DMM) method to analyze microstrip lines and antennas flush-mounted on cylindrical substrates. The DMM is well suited to the analysis of multilayered structures, since the fields must be calculated only at the interfaces between the dielectric layers, so that merely a one-dimensional discretization is needed to analyze cylindrical microstrip structures. The analysis is based on the Green´s function in the spectral domain, which is calculated by using a full-wave equivalent circuit. In order to demonstrate the method, two structures are analyzed: a singly-layered conformal microstrip antenna, and a microstrip line printed on a cylindrical substrate composed of multiple dielectric layers.