A 77 GHz Microstrip Comb-Line Antenna Array for Automotive RADAR application

In this article the microstrip comb-line antenna array for the 77 GHz with a low side lobe level for an automotive radar application is proposed. Antenna consists of 4X 10 element comb line array on the Rogers RO 3003 substrate and has a dimension of 9 x 14.96 mm
²
. For side lobe reduction amplitude tapering is done using Taylor amplitude distribution. The beam steering mechanism is implemented by the Butler matrix technique to achieve the phased array configuration. The goal of design of this antenna is to acquire an appropriate radiation pattern with low side lobe level better than -20dB.