Performs 3D sidelobe suppression for a parabolic dish using multiple dipole rings and LSQR optimization. More...

Detailed Description

Performs 3D sidelobe suppression for a parabolic dish using multiple dipole rings and LSQR optimization.

This script simulates a parabolic dish antenna and uses a set of strategically placed dipoles (arranged in multiple concentric rings) to reduce the sidelobe levels of its radiation pattern. The process involves computing the far-field radiation, masking the main lobe, and solving a least-squares problem to compute optimal dipole currents that minimize unwanted radiation.

Inputs

Dish geometry: focal length, aperture diameter, rim radius, and alpha angle
Feed parameters: frequency, E-field amplitude, and aperture radius
Dipole ring configuration: number of rings, dipoles per ring, ring spacing
Resolution settings for far-field computation

Outputs

Updated 3D radiation pattern with dipoles superimposed
2D slices of radiation pattern for specific phi angles (0 and Ï/2)
Surface current visualization with dipole locations marked

Notes

Dipole symmetry is enforced using an anti-symmetric transform matrix.
Only the masked (non-main-lobe) regions are targeted for suppression.
Requires DishAnalyzer and SimpleDipole classes to operate.
Suppression level is hardcoded via target_atten and atten.