Time-Harmonic Electromagnetic Source Reconstruction by Time-Reversal and FOCUSS

In this paper, a new method is proposed from the FDTD model to solve the challenge that the digital signal source is time-harmonic or single frequency reconstruction. The new method does not need to know Green's function and identify the peak value. Through in-depth exploration and improvement of the frequency domain time-reversal method, the source condition of single frequency sources is derived. A numerical example is given to verify the effectiveness of the proposed method. This work provides another way to further develop practical electromagnetic source reconstruction techniques and test systems.