天線尺寸對(duì)沖激信號(hào)SAR方位向積累的影響
EFFECT OF ANTENNA SIZE ON IMPULSE SIGNAL SAR AZIMUTH ACCUMULATION
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摘要: 該文分析了沖激信號(hào)/極窄脈沖SAR成像系統(tǒng)的天線在輻射與接收時(shí)存在的時(shí)-空耦合問題。結(jié)合沖激信號(hào)SAR成像方法反向投影法(BP)，本文在時(shí)域上分析了天線尺寸對(duì)SAR方位向積累的影響，給出了方位向積累與天線尺寸的定量關(guān)系，最后給出了關(guān)于超寬帶SAR天線設(shè)計(jì)及發(fā)射信號(hào)參數(shù)選擇的有用的結(jié)論．
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關(guān)鍵詞:
- 超寬帶雷達(dá);合成孔徑雷達(dá);方位向積累;雷達(dá)天線
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. -
Harmuth H F. Nonsinusoidal waves for radar and radio communications, New York: Academic,1981, chapter 3.［2］梁甸農(nóng)等．穿透葉簇超寬帶SAR體制及關(guān)鍵技術(shù)項(xiàng)目論證報(bào)告．長沙：國防科技大學(xué)電子技術(shù)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]陸仲良等，沖激雷達(dá)反隱身機(jī)理及關(guān)鍵技術(shù)研究．長沙：國防科技大學(xué)研究報(bào)告，1995年． -
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