现代导航
現代導航
현대도항
MODERN NAVIGATION
2014年
2期
131-135
,共5页
傅立叶变换法%差分进化算法%阵列天线%波束展宽
傅立葉變換法%差分進化算法%陣列天線%波束展寬
부립협변환법%차분진화산법%진렬천선%파속전관
Fourier Transform Method%Differential Evolution Algorithm%Array Antennas%Beam Broadening
提出了一种新型阵列波束展宽的方法,使用差分进化算法结合傅立叶级数变换的初值对阵列波束进行展宽设计。与普通傅立叶级数变换法展宽波束相比,该方法获得主波束范围内的平坦度更好,且能得到更低的副瓣电平。推荐的方法还能避免传统差分进化算法收敛速度慢、易陷入局部最优的问题。文中使用该方法对一个21元的一维直线阵进行波束展宽优化设计。在等幅同相情况下,直线阵的3dB 波束宽度为4.02o,使用推荐方法设计后,3dB 波束宽度扩展到19.6o,主波束范围内的平坦度为0.21dB,证实了该方法的可行性。
提齣瞭一種新型陣列波束展寬的方法,使用差分進化算法結閤傅立葉級數變換的初值對陣列波束進行展寬設計。與普通傅立葉級數變換法展寬波束相比,該方法穫得主波束範圍內的平坦度更好,且能得到更低的副瓣電平。推薦的方法還能避免傳統差分進化算法收斂速度慢、易陷入跼部最優的問題。文中使用該方法對一箇21元的一維直線陣進行波束展寬優化設計。在等幅同相情況下,直線陣的3dB 波束寬度為4.02o,使用推薦方法設計後,3dB 波束寬度擴展到19.6o,主波束範圍內的平坦度為0.21dB,證實瞭該方法的可行性。
제출료일충신형진렬파속전관적방법,사용차분진화산법결합부립협급수변환적초치대진렬파속진행전관설계。여보통부립협급수변환법전관파속상비,해방법획득주파속범위내적평탄도경호,차능득도경저적부판전평。추천적방법환능피면전통차분진화산법수렴속도만、역함입국부최우적문제。문중사용해방법대일개21원적일유직선진진행파속전관우화설계。재등폭동상정황하,직선진적3dB 파속관도위4.02o,사용추천방법설계후,3dB 파속관도확전도19.6o,주파속범위내적평탄도위0.21dB,증실료해방법적가행성。
A new method of array beam broadening is presented in this paper, which uses the differential evolution algorithm combined with Fourier series transform to broaden array beam. Compared with the traditional Fourier series transform, this method can obtain better gain flatness within the range of main beam and lower side lobe level. The presented method can also avoid the problems of having slow convergence speed and easily falling into local optima. The presented method is used to broaden the main beam of a 21 element linear array in this paper. When the elements are excited with the same amplitude and the same phase, the array has a 3-dB beamwidth of 4.02. After using the presented method, the array has a 3-dB beamwidth of 19.6 and the gain flatness within the range of the main beam is 0.21 dB, which validate this method.