Multiple scattering from two semi-circular bosses above the conducting plane

The behavior of electromagnetic scattering from two unidentical semicircular bosses above a conducting half-space is investigated. Image theory is used to account for the specular reflection from the infinitely extended half space. Both incident and scattered fields are expanded in a Fourier series of azimuth angles with unknown coefficients. By enforcing the boundary conditions of the tangential E and H field continuity along two perfectly conducting circular cylinders, the expressions for the scattered fields are obtained. Numerical computations are performed to examine the bistatic and backscattering angular behavior of scattering coefficients, and their results are compared to single-scattering-approximated results. The relative importance of multiple scattering from two bumps is discussed in terms of bump-size, spacing, polarization, and operating frequency.<>