Urgent requirement for Metamaterials design for isolation improvement of GPS patch antenna

I will provide a HFSS file (HFSS 15 or lower version) having closed packed two GPS patch antenna (RHCP), you are expected to design some metamaterials/resonators for isolation improvement as per a suggested paper. Should not drop gain and axial ratio for 1.5-1.62 GHz.
Feel free to contact me if you are interested.
Must be able to complete the order in 36-48 hrs.