Levenberg–Marquardt (LM) method for coupling matrix extraction of microwave filters. This is a gradient-based coupling matrix extraction optimization algorithm that is slower than MVF, but it does not require matrix rotation. This example is a fifth-order Chebyshev coaxial filter. If you want to use the code for other filters, change the optimization variables and corresponding gradients.
Date: 04/08/2022 DD/MM/YYYY