

Deborah.S,
Jayanthy.T,
N.Victor Jaya


Linearly Polarized 4x4 Microstrip Patch
Antenna Array with corporate feed for X-band
applications


Popular commercial designs like 5GHz WLAN or 9GHz shipborne radar
have used for many years far more advanced microstrip patch arrays
that the one proposed in the above paper.
No coordinate system is specified in the article nor the nonstandard
mathematical symbols (delta being used in place of nabla?).
All microstrip patches suffer poor efficiency due to copper losses.
The latter is not simulated nor measured in the article.
The measured radiation patterns suggest a directivity of about 13dBi.
The estimated radiation efficiency is around 50% due to the long
feedlines. The oveall gain is therefore around 10dBi or much less
than specified in the article.

