无线电引信近场目标特性研究

Near-field Characteristic of Target for Radio Fuze

以无线电引信近炸、碰炸的自适应控制为应用背景,建立了目标近场散射特性模型,旨在得出引信处于目标电磁散射近区时,近炸和碰炸情况下的多普勒信号及其频谱的变化规律。针对连续波多普勒体制引信,讨论了点目标情况多普勒信号以及频谱的变化规律,进而研究多点目标,给出了多点目标回波信号以及多普勒频率的仿真结果。采用物理光学法和物理绕射法建立体目标的散射特性模型,并给出了多普勒频谱特性分析方法。

Taking the adaptive control of proximity or impact pattern for radio fuze as applied background, we established a near-field scattering characteristic model for the target to get the variable law of the Doppler signal and its frequency spectrum at making fuze located in electromagnetic scattering near-field of the target under the conditions of proximity and impact patterns. Aiming at the continuous wave （CW） Doppler system fuze, we discussed the variable law of the Doppler signal and its frequency spectrum in the case of point target and further proposed the simulation results of the echo signal and the Doppler frequency in the case of multipoint target. A body target scattering characteristic model was established by physical theory of optics and physical theory of diffraction, and an analytical method of the Doppler frequency spectrum characteristic was given.