喷气式发动机旋转叶片对电磁波的调制效应分析

Analysis of Modulation Effect of Jet Rotor Blade on Electromagnetic Wave

喷气式飞机的J.E.M效应对飞机机身散射的有用信号是个大的干扰。本文首先分析研究发动机旋转叶片在其进气道内形成的实际孔径的周期性变化规律;然后用等效波导模型,采用模匹配法分析波导中旋转叶片对Y极化传输电磁波的调制效应,这种调制效应是用旋转叶片对波导模的反射系数的变化规律来表示的。

This paper studies the periodic change regularity of actual aperture of jet rotor blade in inlet duct,analyzes the modulation effect of rotor blade in waveguide on Y polarization transmission electromagnetic wave with mode matching technique by means of equivalent waveguide model. This modulation effect is represented by change regularity of reflect coefficient of rotor blade on waveguide mode.