通道響應失配對DBF天線旁瓣電平的影響
EFFECT OF INTERCHANNEL MISMATCH ON THE SIDELOBE LEVEL OF A DBF ARRAY
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摘要: 本文研究了通道響應失配對數(shù)字波束形成(DBF)天線旁瓣電平的影響,然后分析了通道頻率響應失配與脈沖響應失配的關系,進而得到通道間頻率響應失配對天線旁瓣電平的影響。結果表明,用DBF技術實現(xiàn)超低旁瓣天線對通道頻率匹配的要求相當高。最后計算機模擬驗證了理論分析結果。Abstract: This paper discusses the effect of impulse response aberration between channels on the sidelobe level of a DBF array, and then derives the relationship between the frequency response mismatch and the impulse response aberration of a channel, by which the effect of frequency response mismatch between channels on the antenna sidelobe level is acquired. It shows that frequency response mismatch degrades sidelobe considerablely. Finally, the results by computer simulations are demonstrated.
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Allen J L, et al. Phased Array Studies. Technical Report, No. 236, MIT Lincoln Laboratory, Nov. 1961.[2]Hsiao J K. Array sidelobe, Error tolerance, Gain and Beamwidth, AD A147004, 1984.[3]Teitelbaum K.A Flexible Processor for a Digital Adaptive Array Radar, IEEE AES Magazine, 1991, AES-6(1):18-22. -
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