Study on Target Pulse Echo Characteristics for Fuse in the Near Field

In order to meet the requirements of fuse´s digital simulation, an algorithm based on the electromagnetic scattering modeling techniques of complex targets in the near field is proposed to calculate the echo power of fuse when the transmitting signal is pulse. The main research work in this paper involves the followings: Considering the influence of antenna pattern and distance as well as spherical wave irradiation, a method established by the PO and PTD and GO methods is presented for calculating the pulse echo characteristics of fuse, including pulse echo power and pulse echo signal. Based on the theoretical analysis methods proposed in this paper, we have developed a program to compute the echo power and signal when the transmitting signal is pulse. Finally, we consider a simplified airplane model, and compute its echo signal and power under different target miss in azimuth. The results show that the average level of echo power decreases with the increase of a miss of the target and the pulse echo signal broadening. Numerical results prove the proposed method high efficiency. It would be especially valuable in engineering application.