文章摘要
许雪莹,葛剑敏,刘镇清.线阵换能器阵元宽度对主瓣半功率点宽度的影响[J].声学技术,2005,(1):61~63
线阵换能器阵元宽度对主瓣半功率点宽度的影响
Effect of linear phase array element width on -3dB main lobe width
投稿时间:2004-04-06  修订日期:2004-08-23
DOI:
中文关键词: 线性相控阵  指向性  主瓣半功率点宽度
英文关键词: linear phased array  directivity  -3dB main lobe width
基金项目:上海市科委重大科技攻关项目(03dz12025)
作者单位
许雪莹 同济大学声学所, 上海, 200092 
葛剑敏 同济大学声学所, 上海, 200092 
刘镇清 同济大学声学所, 上海, 200092 
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中文摘要:
      文章考虑了阵元宽度对主瓣半功率点宽度的影响,并与忽略阵元宽度的线列阵的情况进行了比较。结果表明:阵元宽度对主瓣半功率点宽度的影响非常有限,而且不同的阵元宽度造成的半功率点宽度之间的差异也很小。因此,在简化的情况下,可以用均匀的线列阵来取代实际相控阵进行计算。
英文摘要:
      This paper studies the effects of array element width on half-power bandwidth, and proposes a new method. The actual -3dB main lobe width is a bit wider than in the ideal case that neglects the element size. In a word, the influence of element size on the -3dB main lobe width is marginal, and a simplified solution for discrete point sources can be used as a very colse approximation to that of phased arrays.
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