RADIATION FROM DIELECTRIC COATED ELLIPTIC CONDUCTING CYLINDER BY ASSIGNED ELECTRIC CURRENT DISTRIBUTION

The analysis of antennas conformal to cylindrical surfaces is a challenging problem and it is particularly difficult when the structure is non-homogeneous, as it is for patch antennas printed on curved substrates. In this case the analysis is usually carried out by solving the electric field integral equation with the moments method (1, 2). This technique has been proved to be very effective but it is conditioned by the knowledge of the appropriate Green's function which is expressed as a series of eigenfunctions. A limitation of the method stems from the fact that complete sets of eigenfunctions are available only for a few coordinate systems. Furthermore, the functions involved are very often difficult to treat. For this reason, only antennas printed on layered circular cylinders have been fully investigated.