A 76.5 GHz microstrip comb-line antenna array for automotive radar system

This paper presents a 45 degree linearly polarized microstrip comb-line antenna array for the 76.5 GHz automotive radar system. The 13-element array is implemented on Rogers RO3003 substrate with a size of 20 × 2 mm². The measured gain of the antenna is 11.4 dBi and the sidelobe level is below −16.5 dB at 76.5 GHz.