效应实验用的Ka波段正交解调接收机的研制

Develop of Ka-band quadrature demodulation receiver used in effect experiment

针对毫米波雷达的复杂电磁环境效应实验研究需求,采用超外差和模拟零中频变频级联的结构,研制了一套Ka波段正交解调接收机。该接收机由低噪声放大器、混频器、中频放大器、正交相位检波器等部分组成。测试表明:该接收机具有大于256 MHz的工作带宽,在整个工作频带内具有1 MHz的瞬时正交解调带宽,可用于开展复杂电磁环境对毫米波雷达接收信号链路影响效应实验的研究。

Aiming at the experimental investigation demand of complex electromagnetic environment effect for millimeterwave radar,a Ka-band quadrature demodulation receiver was developed by utilizing the superheterodyne and simulating the zero intermediate frequency variable frequency cascaded structure. This receiver is composed of low noise amplifier,mixer,intermediate frequency amplifier and quadrature phase detector. The testing result indicates that the receiver has operating band greater than 256 MHz,and has 1 MHz instantaneous quadrature demodulation bandwidth in the entire operating band,and can be used to conduct the effect experiment investigation about influence of complex electromagnetic environment on millimeter-wave radar receiving signal link.