A new phased array radar system is proposed for the miniaturization of phased array feed net as well as the higher intercept probability due to high gain directional beam. This system has only one single transmit-receive channel with a phase shifter in its feed net. The channel switches to each array element in turn to feed or receive signal under the control of time-gate module, and there is only one array element connected with the channel at the same time. The concept and technology of beam forming-like are proposed based on the system. The transmitting beam forming-like is operated via each array element transmitting the time diversity pulse signal in turn; the array receives beam forming-like via receiving the pulse signal in turn and utilizes the coherent pulse integration. The direction of main beam can be steered by varying the phase of each array element through controlling the phase shifter and switching time. It is demonstrated in simulations that the proposed system' s performance corresponds to conventional phased array with smaller hardware scale without forming high gain directional beam.%针对常规相控阵雷达的馈线网络小型化问题以及由发射高增益定向波束引起雷达信号被截获概率较大的问题,提出了一种新的相控阵雷达系统.该系统的馈线网络中仅有一个带移相器的收发共用通道,在时序控制模块的控制下贯续接入各收发共用的阵元进行发射信号馈送或信号接收,同一时刻只有一个阵元与通道连接.基于此系统提出了类波束形成的概念与技术,通过各阵元依次发射时间分集的脉冲信号形成类发射波束；各阵元依次接收这些脉冲信号并进行相干脉冲积累以形成类接收波束；并通过控制移相器的相移量以及通道切换时间形成各阵元间发射或接收的相位差进而控制类波束的最大指向.仿真分析证明了该系统能以较小的硬件规模在不形成高增益定向波束的前提下具有与常规相控阵相当的性能.
展开▼
