Regge poles, natural frequencies, and surface wave resonance of a circular cylinder with a constant surface impedance

The radar cross section (RCS) of an infinitely long circular cylinder with a constant surface impedance is obtained via a high frequency ray solution. The ray solution provides a physical picture of the scattering process in terms of a geometrical optics ray and two surface waves. It is shown that the surface wave resonanee phenomenon in the RCS of the cylinder can be predicted in terms of the Regge poles or the natural frequencies of the cylinder. The numerical results for the RCS of the cylinder obtained via the high frequency ray solution show excellent agreement with the eigenfunction results. The condition for predicting the surface wave resonance is also discussed.