respectively. These designs are a derivative of the original microstrip Yagi antenna array [3] in which a high gain is obtained through the constructive interference of two individual microstrip Yagi structures (R-D-D1T-D2T and R-D-D1B-D2B) that maximally radiate at 10° ≤ φ ≤ 16° and -16° ≤ φ ≤ -10°, respectively