Ultra-high Angular Resolution 4D Millimeter Wave Radar Antenna Array Design

Millimeter-wave radar is an important sensor of advanced drive assistance system (ADAS) which is used in automotive intelligent driving technology widely. This paper introduces the antenna array design of 4D millimeter-wave radar that with Ultra-high angular resolution. The antenna form is selected as a rectangular microstrip patch antenna. There are 12 patches distributed in 2 columns and 6 rows in the antenna array. The size of each patch antenna in one column is adjusted by Chebyshev distribution, and the T-type power divider adjusts the power distribution of the two serial-fed arrays, the millimeter-wave radar antenna array has been designed with a center frequency of 76.5 GHz, a bandwidth of 1.8 GHz, and a gain of 15.4 dBi.