不同因素对舰船RCS特性的影响分析

Analysis of Ship RCS Affected by Different Factors

随着雷达技术的不断发展,舰船的生命力受到严重的威胁,为了提高舰船的生存能力,增加舰船的隐蔽性并提高其防护和对抗能力的课题研究已十分重要。舰船RCS(Radar-Cross Section)是海上雷达系统探测回波强度的一个重要物理量,受多种因素影响,会呈现不规律的随机起伏。对影响舰船RCS特性的测量因素进行了研究,包括粗糙海面的起伏特性、不同频率、不同极化方式以及不同入射方向的雷达入射电磁波,给出了粗糙海面的统计模型,运用时域有限差分法(FDTD)对舰船的RCS进行了计算仿真,研究结果为海面雷达的侦测提供了理论参考依据。

With the continuous development of radar technology, the vitality of ships under serious threat, in order to improve the survivability of the ship, increase the concealment of the ship and to improve its protection and counter-measures research is very important. Ship RCS （Radar-Cross Section） is an important physical property of echo inten-sity in the detection of radar system;it is extremely easy to be affected by the rough sea surface,the testing environ-ment and so on,ship RCS will fluctuate randomly. The property of the fluctuating rough sea surface,the incident elec-tromagnetic wave with different frequency and different polarization are all studied and they can affect the ship RCS as well. Statistical model of sea surface is elaborated,FDTD is used in simulating ship RCS. The simulation results pro-vide a theoretical reference for the detection of radar system used above the rough sea surface.