Analysis of slots on a cylindrically layered structure using closed-form green’s functions

Slot geometries have a broad spectrum of applications and have been examined extensively in the literature. For the rigorous analysis of these geometries, the most commonly used numerical technique is the method of moments (MoM) which is widely favored over other rigorous techniques. In this paper, the mutual coupling between two slots placed on a cylindrically layered medium using MoM incorporation with the closed-form Green´s functions is presented. For the calculation of the MoM matrix entries, a hybrid method is used, depending on whether phi is close to phi´ or not. When p = p´ , if phi is not close to phi´ the closed-form Green´s functions are employed. When phi is close to phi´, since the spectral-domain Green´s function do not converge, (phi - phi´) difference term is put into convolutional integral in the spectral-domain while calculating MoM matrix elements.