lsqr_target_peaks_first_sl_2d.m File Reference

Suppresses the first sidelobes in a 2D far-field slice using LSQR optimization. More...

Functions
function	update_phi (in phi_val, in dish_analyzer, in EdB, in EdB_sum, in THETA, in PHI, in theta_range, in h1, in h2, in h3)

Detailed Description

Suppresses the first sidelobes in a 2D far-field slice using LSQR optimization.

This script analyzes a 2D radiation slice of a parabolic dish antenna and identifies the first pair of sidelobes (above and below the main beam) at a fixed azimuthal angle. It places one or more dipoles near the focal point and optimizes their current using a least-squares approach to suppress the sidelobe levels. The resulting field is superimposed to observe the improvement.

Inputs

• Parabolic dish geometry and sampling resolution
• Aperture field function for primary feed excitation
• Far-field extraction at a specific azimuthal angle

Outputs

• Plots of radiation pattern before and after sidelobe suppression
• Visual marker of dipole placement on dish geometry
• Interactive slider to browse far-field slices by phi

Notes

• Only the first sidelobe pair is targeted.
• Dipole configuration is customizable; the default places a single dipole at the focus.
• Use of DishAnalyzer and SimpleDipole classes is required.

Function Documentation

update_phi()

function update_phi	(	in	phi_val,
		in	dish_analyzer,
		in	EdB,
		in	EdB_sum,
		in	THETA,
		in	PHI,
		in	theta_range,
		in	h1,
		in	h2,
		in	h3 )