I had design multi-element structure for MIMO antenna system with desire resonating frequency of 3.5 GHz. But if the same structure is simulated with adaptive mesh option the resonating frequency shift to 3.6.
And when I use same structure in HFSS the resonating frequency is 3.7.
I wonder why this shift of resonating frequency is occurring...
Or Their should be some proper manual or notes about accuracy of CST microwave result.
And When I fabricated my antenna the resonating frequency was 3.8...
Your suggestion in this regard will be highly appreciated.