一种新型和差旁瓣抑制阵列天线

针对传统和差阵列天线旁瓣抑制能力的不足,设计了一种应用于二次雷达的新型和差旁瓣抑制阵列天线.该天线主要由前向阵列、后向单元、波束形成网络和互连的射频电缆构成,其中前向阵列和后向单元共同形成差波束.采用遗传算法对各个天线单元的幅度和相位进行优化,使差波束在工作频带内能够覆盖和波束的旁瓣.仿真和测试结果表明:在13.2％相...

A novel sum-difference side lobe suppression array antenna

A novel sum-difference side lobe suppression array antenna applied in secondary surveillance radar(SSR) system is designed in order to solve the suppression problem with the traditional sum-difference array antenna.The antenna consists of front array, back element antenna, beam forming network and RF cables. The difference beam is formed by front array and back element antenna, of which the amplitudes and phases is optimized by genetic algorithm. By using this method, a good coverage of the side lobe of the sum beam is obtained in operating bandwidth.The simulation and test results of the antenna show that the characteristics of the sum beam is the same as the conventional sum-difference antenna, meanwhile, the difference beam can achieve 100% coverage in azimuth of the side lobe of the sum beam with a relative band width of 13.2%.