The measured result of return losses of the proposed
microstrip Yagi antenna compared with the simulation is
shown in Figure 7. It can be seen that the measured frequency
response of 37.575 return loss is shifted to 5.85 GHz as
compared to the simulated result. Deviations may be partly due
to the inaccuracies in antenna fabrication process such as
during soldering and losses occurred because of the FR-4 board
itself. However, the measured result still covering the 5 GHz
Wi-Fi band (5.725-5.875GHz).