Hello everyone,
I used OpenEMS software for my simulation and I got simulation results that are very different from my experimental result, I have a PCB antenna whose resonant frequency is around 2.4GHz. I design the same thing on OpenEMS but the simulation gives me a resonant frequency of around 2.66GHz. Such a difference of 0.2GHz is important in RF, isn't it? Knowing that the frequency range of Bluetooth Low Energy is 2.4-2.5GHz.
I have calibrated very well my NanoVNA and my experiment result must be good. I know that because I tested the Texas instrument PCB IFA antenna and I get the same result as in their Datasheet.
Can you recommend a free tool for antenna simulation?
I have searched but I can only find OpenEMS based on the FDTD method. The others are professional and paid tools for PCB trace antenna simulation.
Best regards.
