Integral numerical technique for the study of axially symmetric resonant devices

A numerical technique is proposed which is based on the coupling of Kirchhoff´s integral formulation and the moment method and is suitable for application to the study of a wide class of axially symmetric resonant devices. Numerical results are presented and compared with corresponding theoretical data for two systems which allow an analytical treatment. The results confirm the validity of the method and its broad applicability. The simplicity and generality of the formulation allow such problems as unbound systems to be tackled, something that is difficult with other techniques. The complexity of the numerical procedure is not excessive, and the consideration of a low number of intervals in the boundary partition leads to quite accurate results, errors in frequency being less than 1%