Demonstrates selective sidelobe reduction in a dish antenna using multiple dipoles. More...

Detailed Description

Demonstrates selective sidelobe reduction in a dish antenna using multiple dipoles.

This script constructs a parabolic dish illuminated by a circular aperture, computes its far-field radiation pattern in a given phi plane, and then reduces selected sidelobes using individually placed DirectedDipole elements. A linear system is solved to obtain dipole excitations that suppress the field strength in selected directions.

KeyFeatures

Constructs a parabolic reflector surface and computes surface currents from a user-defined feed.
Computes the far-field E-theta and E-phi components over a fixed phi-plane and a theta sweep.
Identifies sidelobe peaks using peak finding (findpeaks) and selects a subset to reduce.
Places dipoles near the feed and solves a linear system for current values that cancel out selected lobes.
Superimposes dipole radiation with dish pattern and compares before/after effects on radiation pattern.

Parameters

Frequency: 2.5 GHz
Dish focal length: 100 Ã Î»â
Far-field distance: 10000 Ã Î»â
Number of dipoles: equal to number of selected sidelobe peaks
Sidelobe suppression target: 80% reduction

Note: The script uses a simplified model for dipole radiation and does not include mutual coupling effects.; Uses DirectedDipole class for directional dipole pattern modeling.

See also: ParabolicDish; DirectedDipole; circ_aperture_fields