CAJ | 학술논문

为扩展时间反转理论在电磁领域的应用，提出了一种基于主动探测的时间反转电磁波聚焦方法。该方法是通过时间反转目标的反射波并在目标搜索域内进行能量搜索来实现重聚焦的。首先，收发合置传感器阵列的一个天线阵元向目标区域发射电磁波信号，该电磁波信号遇到目标后反射，反射后的电磁波被各天线阵元接收并记录。当所有阵元全部完成上述发射和接收过程后，将每个阵元中得到的所有信号相加，并进行时间反转。然后，将各阵元时间反转后的信号虚拟重发到目标域中，则信号能量会在目标处实现重聚焦。根据电磁波的传播特性，给出了主动探测型时间反转聚焦的原理及方法。最后，通过仿真实验验证了主动探测型时间反转可以有效实现电磁波重聚焦的特性。
위확전시간반전이론재전자영역적응용，제출료일충기우주동탐측적시간반전전자파취초방법。해방법시통과시간반전목표적반사파병재목표수색역내진행능량수색래실현중취초적。수선，수발합치전감기진렬적일개천선진원향목표구역발사전자파신호，해전자파신호우도목표후반사，반사후적전자파피각천선진원접수병기록。당소유진원전부완성상술발사화접수과정후，장매개진원중득도적소유신호상가，병진행시간반전。연후，장각진원시간반전후적신호허의중발도목표역중，칙신호능량회재목표처실현중취초。근거전자파적전파특성，급출료주동탐측형시간반전취초적원리급방법。최후，통과방진실험험증료주동탐측형시간반전가이유효실현전자파중취초적특성。
In order to extend the application area of time reversal theory in the electromagnetic field,a method for electromagnetic wave focusing based on the active detected time reversal theory is proposed. This method accomplishes the refocusing of signal energy by time reversing the reflected waves of targets and searching signal energy in the search area.Firstly,an antenna element in the transducer array emits electromagnetic waves to the target area.And this signal is reflected by targets,and every antenna element receives and records the reflected signals.When the process of emitting and receiving is finished by all antennas,all signals received by an antenna are added and time reversed.Then,retransmitting the time-reversed signals of every antenna to the target area virtually,and the signal energy is refocused in the direction of targets.Based on the propagation characteristics of electromagnetic waves the fundamentals of and the algorithm for active detected time reversal refocusing are given in this paper. Finally, the characteristic that the proposed method can accomplish electromagnetic wave refocusing effectively is validated via simulation.