Fig. 5
From: Design and development of multiband PIFA antenna for vehicular LTE/5G and V2X communication
Return loss was measured and modeled (S11). This graph shows the contrast between actual results and results from simulations. In comparison with the simulated outcomes, the measured results are slightly biased. The manual construction of the antenna could be to blame for the movement. The differences between the measured and the observed Small production mistakes are blamed for simulated results