【摘要】：箔條作為歷史最悠久的無源干擾措施之一,被逐步移至彈道中段這一嶄新的戰(zhàn)場環(huán)境中。為充分發(fā)揮箔條在彈道中段的干擾效果,迫切需要了解其在稀薄大氣中的相關(guān)特性。論文對彈道中段箔條的運動擴散、電磁散射、電波傳播等基本特性、箔條干擾的一維高分辨距離成像特性以及基于箔條云散射特征的有源轉(zhuǎn)發(fā)干擾特性進行了探討,并通過仿真簡單評估了干擾效果,提出了干擾技術(shù)建議。論文的主要內(nèi)容包括三個部分:第一部分是總結(jié)箔條云的基本特性。結(jié)合彈頭彈道軌跡、綜合考慮箔條拋撒位置的大氣環(huán)境,首先對箔條拋撒后的初始指向分布及運動擴散特性進行了分析,并根據(jù)相干合成原理,由單根箔條散射特性得到整個箔條云團的雷達散射特性。然后基于箔條的前向和后向散射理論,給出了不同極化條件下均勻分布箔條的等效傳播常數(shù),最終得到在箔條介質(zhì)中傳播的電磁波衰減特性。第二部分是探討箔條云干擾的一維高分辨距離成像特性。以箔條散射特性為基礎(chǔ),結(jié)合一維距離像成像理論,通過仿真得到了稀薄大氣中隨機分布箔條在不同拋撒方式、不同指向等情況下的一維高分辨距離成像特性。第三部分是分析基于箔條云散射特征的有源轉(zhuǎn)發(fā)干擾特性。提出一種將實施有源轉(zhuǎn)發(fā)的干擾機與無源箔條相融合的干擾手段,論文首先從功率角度對這種基于箔條云散射特征的有源轉(zhuǎn)發(fā)干擾進行了可行性分析。然后基于線性調(diào)頻信號的轉(zhuǎn)發(fā)干擾模型,通過仿真分析了雷達信號經(jīng)干擾機直接轉(zhuǎn)發(fā)和簡單調(diào)制后轉(zhuǎn)發(fā)這兩種情況下,再經(jīng)箔條云反射的干擾回波特性。
[Abstract]:Chaff, as one of the oldest passive jamming measures, has been gradually moved into the new battlefield environment. In order to give full play to the jamming effect of chaff in the middle of trajectory, it is urgent to understand the relevant characteristics of chaff in the rarefied atmosphere. In this paper, the basic characteristics of chaff such as motion diffusion, electromagnetic scattering, electric wave propagation, one-dimensional high-resolution range imaging of chaff interference and active forward jamming based on chaff cloud scattering are discussed. The jamming effect is evaluated simply by simulation, and some technical suggestions are put forward. The main contents of the thesis include three parts: the first part is to summarize the basic characteristics of chaff cloud. Combined with warhead trajectory and considering the atmospheric environment of chaff throwing position, the initial direction distribution and motion diffusion characteristics of chaff are analyzed firstly, and according to the principle of coherent combination, the initial direction distribution and motion diffusion characteristics of chaff are analyzed. The radar scattering characteristics of the whole chaff cloud are obtained from the scattering characteristics of a single chaff. Then, based on the forward and backward scattering theory of chaff, the equivalent propagation constants of chaff with uniform distribution under different polarization conditions are given, and the attenuation characteristics of electromagnetic wave propagating in chaff medium are obtained. In the second part, we discuss the one-dimensional high-resolution range imaging characteristics of chaff cloud interference. Based on the scattering characteristics of chaff and the imaging theory of one-dimensional range profile, the one-dimensional high-resolution range imaging characteristics of the randomly distributed chaff in rarefied atmosphere under different scattering modes and different directions are obtained by simulation. In the third part, the characteristics of active forward jamming based on chaff cloud scattering feature are analyzed. In this paper, a jamming method which combines the active repeater and passive chaff is proposed. Firstly, the feasibility of the active forward jamming based on chaff cloud scattering feature is analyzed from the power point of view. Then, based on the forward jamming model of LFM signal, the characteristics of jamming echo reflected by chaff cloud are analyzed by simulation.
【學位授予單位】：國防科學技術(shù)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN974

【參考文獻】

相關(guān)期刊論文 前10條

1 黃瑯，

本文編號：2288740