Radiation from a long dipole antenna in the presence of infinitely long circular cylinder

摘要

The radiation from a long dipole in the presence of an infinitely long circular conducting parallel cylinder is examined analytically, The expression for the far-zone field, which includes all successive multiple scattering terms between the dipole and the cylinder, is derived using an iterative approximate procedure. The current induced on the dipole due to backscattering from the cylinder is calculated for each iteration. The derivation includes integral expressions which are solved asymptotically using the far-zone field approximations. Also a numerical technique is employed for solving the problem in order to verify the analytical solution. The results due to both analytical and numerical solutions are in excellent agreement with each other. It is also found that the interaction between the dipole and the cylinder has a significant effect on the radiation field.