BTW, I am still not sure, why it is not suitable. nT. Bernabeu-Jimenez; A.Valero-Nogueira..., A Comparison between Natural Resonances and Characteristic Mode Resonances of an infinite circular cylinder nThe solution can be separated on internal and external modes, with radiated and non-radiating significance effectively filtered by eigenvalues close to zero or infinity...nI really wish to see the exact modes without pinning them artificially by inserting additional boundaries (like linked faces, shorting pins and holes) in the model. n