【摘要】 本文为工作于K波段的车载防撞雷达收发前端设计并制作了一款高增益低副瓣易集成的微带贴片阵列天线。该天线采用串并结合馈电形式,在满足各阵元激励同相不等幅的基础上,既有效减小了馈电网络的损耗,又实现了天线小型化。测试结果表明,该8×6元微带天线阵带宽为24.2~24.8GHz(VSWR<1.5),最大增益可达20.2d B,第一副瓣电平-20d B,E面、H面的半功率波瓣宽度为16.7°和11.8°,其尺寸仅60mm×45mm。该阵列天线凭借其高增益、低副瓣、、结构紧凑体积小及性能稳定等优点,经验证实用性强,在汽车防撞雷达系统中有广阔的应用前景。更多还原

【Abstract】 A microstrip patch array antenna with advantages of high gain,low side- lobe and easy to be integrated at K band for vehicular anti- collision radar front- end is designed and fabricated. The antenna adopts feed network with series and parallel combined to reduce loss of feed network effectively and to realize miniaturization of antenna on basis of satisfying requirement of each element of antenna array excited by the same phase and unequal amplitude. The tested results show that the bandwidth( VSWR < 1. 5) of the 8 × 6 microstrip antenna array is 24.2 ~ 24. 8GHz,the maximum gain can reach 20. 2d B,the first sidelobe level is- 20 d B,half power beamwidth is16. 7°and 11. 8°at E and H plane,and the size is only 60 mm × 45 mm. Being featured with the advantages like high gain,low side lobe,compact structure,small size,and stable performance,the practicability of array antenna is verified and it can be widely applied in automobile anti- collision radars.更多还原