Sparse-array Synthetic Impulse and Aperture Radar (SIAR) can isotropically radiate by employing multiple frequencies (synthetic pulse) and multiple antennas (synthetic antenna).

• 稀布阵综合脉冲孔径雷达(SIAR)采用多个频率信号同步全向照射工作方式,通过脉冲综合可以获得一定的脉压比。