Antenna simulation accuracy vs. measurement results of small form factor device

A three-band LTE Cat-M1 PCB antenna is simulated and measured and these results are compared in this paper. Antenna resonance frequency at 700 MHz is matching well with simulations. Above 1.5 GHz resonances have a difference of about 70 MHz. With tuned antenna measured efficiencies are 1 dB worse on average than simulated efficiencies when difference at reflection coefficient is taken into account. Active TRP measurements finally show maximum efficiency difference between simulation and measurement of 2.2 dB. As results show there are some differences between the measurements and simulations. However, these differences are small enough that new design round for the device is not needed and the device can be finished with tuning component changes only.