A Design Method of Microstrip Series-fed Array Antenna

In this paper, a new design method of microstrip series-fed array antenna for vehicle radar technology is proposed. The energy transmission and radiation between antenna elements are expressed and deduced using S-parameters in this method. A constant-amplitude and in-phase microstrip series-fed array antenna is designed through the analysis of this method. The results show that the bandwidth of the antenna ranges from 23.78 GHz to 24.27 GHz for| S₁₁| <; -10 dB and the gain is 12.35 dBi at the center frequency.