通道响应失配对DBF天线旁瓣电平的影响
EFFECT OF INTERCHANNEL MISMATCH ON THE SIDELOBE LEVEL OF A DBF ARRAY
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摘要: 本文研究了通道响应失配对数字波束形成(DBF)天线旁瓣电平的影响,然后分析了通道频率响应失配与脉冲响应失配的关系,进而得到通道间频率响应失配对天线旁瓣电平的影响。结果表明,用DBF技术实现超低旁瓣天线对通道频率匹配的要求相当高。最后计算机模拟验证了理论分析结果。
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关键词:
- 阵列天线; 数字波束形成; 容差; 均衡
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. -
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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