An Unbalanced-Feed Grid Array Antenna Composed of Diamond-Shaped Elements Printed on a Dielectric Substrate

An unbalanced-feed grid array antenna composed of diamond-shaped elements printed on a dielectric substrate (UB-Dia-PGAA) is analyzed using the method of moments. It is found that the directivity for the UB-Dia-PGAA is higher than that for a conventional unbalanced-feed printed grid array antenna. It follows that the bend angle of the diamond-shaped element contributes to increasing the directivity for the UB-Dia-PGAA.