In this study, a fan-beam microstrip array antenna for an X-band radar was designed and fabricated using a novel technique. A microstrip array structure was used to obtain a high-gain and narrow horizontal beam-width. The feeding point is located at the center of the antenna because of its $360^{circ}$ rotational characteristic. The measured results indicate a gain of 23dBi, and a horizontal and vertical beamwidth of $3.57^{circ}$, $26.12^{circ}$, respectively. The proposed antenna performed adequately and managed to meet the specifications.