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本文探讨了与雷达频率和反辐射导弹制导用干涉仪间距(或孔径尺寸)有关的各种因素。所作分析的依据是固定在弹体上的干涉仪,因为它简单而又十分通用。研究结果表明,由于多路径和相位测量精度的限制而产生的瞄准误差与天线孔径(波长d/λ)成反比。更重要的是,当d/λ比减小时,作为目标方位角函数的瞄准误差的角频率也减小。低角速率时的瞄准误差斜率比高角速率时的同样斜率更易于耦入弹体制导回路。这种耦合会导致导弹不稳定或需要增加滤波,从而使脱靶量增加。这些局限性实际上限制了反辐射导弹去成功地截击低频辐射的目标。
This article explores various factors related to radar frequency and interferometer spacing (or aperture size) for anti-radiation missile guidance. The analysis is based on an interferometer that is fixed on the projectile, because it is simple and very versatile. The results show that the aiming error due to the limitations of multipath and phase measurement accuracy is inversely proportional to the antenna aperture (wavelength d / λ). More importantly, as the d / λ ratio decreases, the angular frequency of the aiming error as a function of the target azimuth also decreases. The aiming error slope at low angular rates is more easily coupled into the projectile guidance circuit than the same slope at high angular rates. This coupling can cause the missile to become unstable or require additional filtering, resulting in increased miss distance. These limitations actually limit the goal of anti-radiation missiles to successfully intercept low-frequency radiation.