A 60GHz Series-fed Microstrip Patch Antenna Array for Millimeter Wave Automotive Radar Application

This paper presents the design of the microstrip series-fed antenna array for 60GHz millimeter-wave radar applications. It utilizes a Dolphe-Chebyshev distribution to reduce the side lobe level (SLL) and adopts a grounded coplanar waveguide (GCPW) as feeding structure. The designed antenna array is fabricated and tested, and the measure results align well with the simulation results. Building upon this, a 20-element antenna array is designed. Simulation results indicate that the −10dB impedance bandwidth is 880MHz, SLL is less than −17dB, and the half-power beamwidth (HPBW) is 4.6°. The demonstrated high gain, narrow HPBW, and low SLL make this antenna suitable for 60GHz narrow beam millimeter-wave radar applications.