Wideband microstrip antenna array based antenna system for GHz communications

A wideband microstrip antenna array based antenna system comprising:

• a dielectric substrate of four dielectric layers;
• multiple microstrip patch antennas, wherein each of the microstrip patch antennas includes at least one U shaped slot, and the microstrip patch antennas are arranged spaced apart from each other in a linear array on top of said dielectric substrate involving close proximal disposition of said U shaped slots to operate as resonators and move higher and lower end resonance frequencies of the antenna array system;
• a microstrip feed network within the dielectric substrate for feeding the microstrip patch antennas with U shaped slots by electromagnetic coupling;
• dummy elements which are identical with the microstrip patch antenna on both ends of the linear array, said dummy elements are non-excitable by the microstrip feed network to reduce side lobe;
• and
• two conducting ground planes to improve array performance with high main lobe gain.