Electromagnetic scattering from three-dimensional cavities via a connection scheme

Computer memory constraints often dictate the number of unknowns which can be realistically handled in three-dimensional problems of electromagnetic scattering from cavities. To partially alleviate this constraint, the authors apply a connection scheme which allows the entire cavity to be subdivided into sections and each section to be analyzed completely independently of other sections. This entails applying the boundary-integral formulation of each section and determining the generalized admittance matrix representation of the section. Using the concept of input and load admittance, the aperture admittance matrices of different regions can then be cascaded together to form the overall cavity aperture admittance. Numerical results generated by the formulation are validated against published data for regular geometries.<>