Simulation of a multiband dipole for 3.7, 7.05, 14.2, 18.1, 21.2, and 28.5 MHz.
There are 6 dipoles of almost half a wavelength each. They are all connected to the same feed point.
This is an example where we need simulation software capable of modeling very close wires.
Download:
https://www.antennasimulator.com/examples/AN-SOF_MultibandDipole.zip