If you mean symmetrical loop antenna, on https://www.qsl.net/wb6tpu/swindex.html
you can find 4nec2 with biquad antenna(loop+relector) as and other loop antenna examples.
I've developed a self made MatLab code about phased arrays, if u give me the layout and the RF performances u want to compute I can help u ok?
Would you mind if I checked out your code? I am looking to do an academic project on radars. I have never done any antenna or array simulations in anything other than 3D full wave simulators, I would like to see what would go into a Matlab simulation.