In this paper, a new design and analysis of a highly compact metamaterial antenna array for radar applications operating in the S‐band (2–4 GHz) is presented. To enhance the electrical and radiation characteristics of the proposed antenna, a slot was introduced into the radiating element, and a novel power divider was employed. The antenna structure incorporates a metamaterial complementary split‐ring resonator (CSRR). The results show that at a resonant frequency of 2.55 GHz, the proposed antenna exhibits a reflection coefficient ranging from −32 to −10 dB. When the two‐element array is assembled, the radiation gain increases to 6.4 dB, with an efficiency of 91.24%. Furthermore, the antenna array provides a complete 360° coverage, enabling omnidirectional and continuous scanning. This feature is crucial for radar applications, as it ensures optimal target detection throughout the entire radar perimeter, without blind spots or interruptions.
Hamadi et al. (Thu,) studied this question.