Scattering analysis on parallel metal cylinders irradiated by high power microwave based on three-dimensional induced field ratio

To study the reaction of the complex metal cylinders irradiated by high power microwave, a three-dimensional induced field ratio (IFR) algorithm for analyzing the scattering field of the finite length parallel cylinders is presented. A three- dimensional induced field ratio model is established to calculate the scattering fields by method of moments (MoM), and equivalent radiation currents are derived. The impedance distribution of a thin wire antenna is taken for reference to deduce the distribution on the thin cylinders. The induced field ratio matrix related to the length and the radius of cylinders and observation angle is derived. Three parallel cylinders are arranged to obtain the scattering field of an array composed of cylinders with different length and distance as exemplified. The accuracy is proved by comparing the results with that from MoM. The induced field ratio matrix is only needed, which accelerates the computing with high accuracy, to obtain the scattering field of the array consisting of cylinders with different distance and length.