Fig.11 and 12 show the radiation pattern for simulation
and measurement of patch array antenna. The simulation
result shows the major lobe directed the signal at 0° with
beamwidth (HPBW) of 24.7°. The measurement result
shows the major lobe is shifted few angle to the left of
center angle 0° at 353° with beamwidth (HPBW) of 33.9°.
This is possibly because of the noise floor from the
equipment itself and also the measurement is done in open
space where this should be done in the chamber to reduce
the effect of noise.