Calculation and Analyze of Reradiation Interference from Shared Tower

The new antenna makes the scattering field of the shared tower more complicated, and the discontinuous scatterers have a coupling effect under multiple excitation sources, which leads to changes in the boundary conditions used to derive the electric field integral equation in the traditional transmission line passive interference solving algorithm. For this reason, based on the generation mechanism of the passive interference scattering field of the transmission line, this paper considers the coupling effect between discontinuous electromagnetic scatterers, and proposes an improved method for solving the passive interference level of the shared tower based on the LE-PO algorithm. Based on the reciprocity theorem and the principle of equivalence, the boundary conditions after the second-order coupling scattering of the shared iron tower scatterer are derived, and the equivalent sources of the scatterers in the mutual coupling background are obtained. The source performs integral solution to obtain the scattered field of the shared iron tower, and finally realizes the accurate solution of the passive interference level. The experimental verification of a single antenna and a single iron column in an anechoic chamber shows that the error of the passive interference solution method considering the coupling is 2.62%, while the error of the traditional LE-PO algorithm is 9.85%.