How to do an optimization for Axial Ratio

I <3 EMC

Hello

 

I am trying to reduce the axial ratio on a LHCP truncated patch antenna, however having little success using the Nelder-Mead method.

For the goal, the focus type is E-field, polarization is axial ratio, the operation is minimum and the operator type is minimize.

I have selected a few parameters to vary.

Is this the correct way to set up an optimization of this type or can anyone advise on other configurations?

Thanks

I <3 EMC

Adding additional goal function to reduce RHC gain helped and so did iterations with different starting values and using smaller and smaller values for the axial ratio goal.