提出了一种基于多载频时间调制频偏的时空可控点聚焦频率分集阵列天线。首先，实现对动目标的跟踪，在频偏中引入一个时间补偿因子,以避免可能出现的频率奇异性，使得连续频率调制的持续时间远大于周期调制的持续时间；然后,根据目标实时位置计算频偏，实现目标在运动全程中保持波束聚焦于目标点处；最后,通过运动目标跟踪的仿真算例验证了方法的有效性。

A time-space steerable point-focusing Frequency Diverse Array (FDA) antenna based on multi-carrier frequency with time-modulated frequency offset is proposed.In order to achieve the tracking of the moving target, a time compensation factor is introduced in the frequency offset to avoid the possible frequency singularity, so that the duration of the continuous frequency modulation is much longer than that of the periodic modulation.Then the frequency offset is calculated according to the real-time position of the target to achieve the goal of keeping the beam focused on the target throughout the whole process of itsmotion. Finally, a simulation example of moving target tracking is given to verify the effectiveness of the method.