In order to meet the requirements of fuse's digital simulation, an algorithm based on the electromagnetic scattering modelling technique of complex targets in the near field is proposed to calculate the echo power of fuse in missile-target encounter. The main research work in this paper involves the followings: (1) 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. (2) Presenting the method of modelling of near-field electromagnetic scattering in missile-target encounter. (3) Based on the theoretical analysis methods proposed in this paper, we have developed a program, and we consider a airplane model, and compute its echo signal and power under different target miss in azimuth. And the emulation results show that the average level of echo power decreases as well as the curve shift right with the increase of a miss of the target. And the echo does not change obviously under different angel of course. Numerical results prove the proposed method high efficiency. It would be especially valuable in engineering application.
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