天线尺寸对冲激信号SAR方位向积累的影响
EFFECT OF ANTENNA SIZE ON IMPULSE SIGNAL SAR AZIMUTH ACCUMULATION
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摘要: 该文分析了冲激信号/极窄脉冲SAR成像系统的天线在辐射与接收时存在的时-空耦合问题。结合冲激信号SAR成像方法反向投影法(BP)，本文在时域上分析了天线尺寸对SAR方位向积累的影响，给出了方位向积累与天线尺寸的定量关系，最后给出了关于超宽带SAR天线设计及发射信号参数选择的有用的结论．Abstract: In this paper, the temporol-spatial coupling problem about antenna radiating and receiving of impulse signal SAR is analysed. Using back projection method, an impulse signal SAR imaging algorithm, antenna size how affects the impulse signal SAR azimuth accumulation is analysed in time-domain, the quantificational relation between azimuth accumulation and antenna size is presented. Finally, some usable conclusions about designing ultrawide band SAR antenna and selecting the parameter of transmitting are given.
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Harmuth H F. Nonsinusoidal waves for radar and radio communications, New York: Academic,1981, chapter 3.［2］梁甸农等．穿透叶簇超宽带SAR体制及关键技术项目论证报告．长沙：国防科技大学电子技术系，1996，6．[2]Chaney D, Willsky A S, Novak L M. Coherent aspect-dependent SAR image formation, SPIE 2230, 1994, 256-265.[3]McCorkle J W. Focusing of synthetic aperture ultra-wideband data, Proc. IGARSS89, Vancouveer:1989, 1-5.[4]陆仲良等，冲激雷达反隐身机理及关键技术研究．长沙：国防科技大学研究报告，1995年． -
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