For general exploringobjects requirement, narrow pulse signal with tens millimicro second to millimicrosecond has the frequency spectrum from DC to thousands MHz.

按照对地目标探测的一般需要,通常采用纳秒到十纳秒量级的电磁探测窄脉冲,信号频谱具有从直流低频直到千兆赫兹的宽带。