Simulates 3D far-field radiation of a parabolic dish and suppresses sidelobes using LSQR optimization with a single dipole ring. More...

Detailed Description

Simulates 3D far-field radiation of a parabolic dish and suppresses sidelobes using LSQR optimization with a single dipole ring.

This script constructs a parabolic dish antenna, computes its far-field radiation pattern, and uses a ring of dipoles placed in front of the feed to suppress sidelobes via least-squares minimization. The main lobe is preserved by masking it from the optimization target.

Inputs

Dish design: focal length, aperture size, rim radius, opening angle
Feed: circular aperture parameters and excitation frequency
Dipole configuration: 1 ring with uniformly spaced dipoles
Target suppression region: everything outside the main beam (mask)

Outputs

Visualizations of surface current and far-field radiation
2D and 3D radiation pattern plots with and without dipole correction

Usage

Ensure DishAnalyzer and SimpleDipole classes are available
Adjust N (dipole count) and mask settings to target specific regions

Note

The dipole optimization is performed using MATLAB's lsqr function
Only one ring of dipoles is used in this script (see _mulrings variant for multi-ring)