Proximity-coupled feed patch antenna array for 79 GHz automotive radar

Abstract

Autonomous driving is becoming a reality-but low-cost 79 GHz radar antenna technology is still imperfect. Here, the authors propose a kind of proximity-coupled feed patch antenna array. By reducing the non-linear mutual interference between the transmission line and the radiating elements, the antenna's operating bandwidth is improved and the antenna gain is increased. Moreover, the consistency of the antenna radiation pattern at different frequencies is also improved. The simulation results show that the antenna has a −10 dB impedance bandwidth from 76 to 81.4 GHz, and the gain is >14.8 dB. Within the operating frequency band, the antenna main lobe width is smaller than ±1.2°

Keywords

• radar antennas
• antenna radiation patterns
• road vehicle radar
• microstrip antenna arrays
• antenna feeds
• millimetre wave antenna arrays
• microstrip lines
• radar interference
• proximity-coupled feed patch antenna array
• automotive radar
• nonlinear mutual interference
• antenna gain
• antenna radiation pattern
• antenna main lobe width
• autonomous driving
• low-cost radar antenna
• transmission line
• radiating elements
• antenna operating bandwidth
• frequency 79.0 GHz