应用于24GHz物位雷达的微带阵列天线设计

为了提高24 GHz物位雷达系统的精度和抗干扰能力,设计并制作了一款高增益、低副瓣、易集成的微带阵列天线。为了抑制天线的副瓣电平,该天线各阵元间的电流采用同相不等幅分布设计;同时,采用两种不同馈线的单元和串并联混合馈电网络,降低了馈电网络的设计难度。实测结果表明,该阵列天线的带宽为690 MHz(23.77~24.46 GHz),最大增益达到20.1 dBi,E面和H面的副瓣电平分别为-20.7 dB和-19.3 dB。该阵列天线结构紧凑、可靠性高,可用于24 GHz物位雷达系统。

Microstrip array antenna design for 24 GHz level radar

A microstrip array antenna with high gain,low side-lobe and easy integration was designed to improve the accuracy and anti-jamming ability of 24 GHz object level radar system.In order to suppress the side-lobe level of the antenna,the current of the array elements were designed with the same phase and unequal amplitude distribution.Simultaneously,the design complexity of the feeding network was reduced by adopting two different feeding units and a series-parallel hybrid feeding network.The measured results show that the array antenna bandwidth is 690 MHz(23.77-24.46 GHz),and the maximum gain can reach 20.1 dBi.The side-lobe level of plane E and plane H is-20.7 dB and-19.3 dB,respectively.With compact structure and high reliability,the array antenna can be used in 24 GHz object level radar system.