Modulated oscillations in finite array scan impedance

Finite-by-infinite dipole and dipole/screen across the finite dimension, have shown Gibbs type oscillations in the normalized scan impedance, for both half-wave and resonant (embedded) dipoles. Both spatial and spectral domain exact simulators have been used, with identical results, and these results are approximately independent of the dipole radius as long as the dipoles are thin. An exception occurs for the E-plane scan of resonant dipoles/screen, where the Gibbsian envelope is slowly modulated, with the modulation period and the envelope decay rate changing with the dipole radius. This effect is most pronounced at the broadside