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Rotor-blade modulation on antenna amplitude pattern and polarization: predictions and measurements

机译:天线幅度模式和极化的转子叶片调制:预测和测量

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摘要

The rotation of lift- and thrust-generating airfoils causes a periodic variation in aircraft communication signals. This effect is called rotor-blade modulation (RBM). The RBM on the radiation characteristics of helicopter-mounted antennas are predicted using the uniform theory of diffraction (UTD) and the finite-difference time-domain (FDTD) method and are compared with scale model measurements and full-scale in-flight measurements. In addition, the effects of electric field polarization on RBM are studied using the FDTD.
机译:产生升力和推力的机翼的旋转引起飞机通信信号的周期性变化。这种效应称为转子叶片调制(RBM)。使用统一衍射理论(UTD)和时域有限差分时域(FDTD)方法预测了直升机天线辐射特性的RBM,并将其与比例模型测量和全比例飞行中测量进行了比较。此外,使用FDTD研究了电场极化对RBM的影响。

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