A microstrip rectangular patch array antenna that feed by
microstrip line has been designed, simulated and compared
with the single rectangle antenna. The performance was
measured and it shows that the array antenna outperform the
single antenna in terms of directivity, bandwidth and gain.
The final array antenna design was than fabricated and the
performance was than compared with the simulated array
antenna. Overall, the performance of the array antenna
meets the desired requirement in terms of return loss and
VSWR. The simulation return loss is equal to -20.24 dB and
VSWR is 1.215 at the center frequency of 2.5GHz.
However, the center frequency has been shifted about 6.8%
from the simulated value. Adding to this, the performance of
the microstrip array antenna strongly depends on several
factors such as feeding technique, type of substrate, the
thickness and dielectric constant of substrate respectively.