CAJ | 학술논문

相比传统周期栅格密度加权阵，非周期排布密度加权阵有很多优点，但对非周期排布密度加权阵的设计方法却不完善。该文提出了一种利用质心Voronoi图设计密度加权阵的新方法，这种方法可以按照预期幅度加权设计非周期排布的密度加权阵，得到的单元排布具有非周期性和匀称性的特点。作为例子分析了一个直径为32.8λ的圆形阵，分别计算了按圆口径泰勒分布-25 dB,-30 dB,-35 dB和-40 dB副瓣设计的阵列方向图。相比已有文献中的计算结果，用该方法能获得更好的副瓣性能和口面效率。
상비전통주기책격밀도가권진，비주기배포밀도가권진유흔다우점，단대비주기배포밀도가권진적설계방법각불완선。해문제출료일충이용질심Voronoi도설계밀도가권진적신방법，저충방법가이안조예기폭도가권설계비주기배포적밀도가권진，득도적단원배포구유비주기성화균칭성적특점。작위례자분석료일개직경위32.8λ적원형진，분별계산료안원구경태륵분포-25 dB,-30 dB,-35 dB화-40 dB부판설계적진렬방향도。상비이유문헌중적계산결과，용해방법능획득경호적부판성능화구면효솔。
Density Tapered Arrays (DTA) with nonperiodic spaced elements have many interesting features when compared to traditional DTA in which antenna elements are located only at the intersections of periodic grid;however, a design method is yet to be fully develoed. A new approach is presented using Centroidal Voronoi Tessellations (CVT) to design DTA with nonperiodic element distributions proportional to the desired amplitude taper and with nonperiodic and‘uniform’ properties. A 32.8λdiameter circular aperture array with 1656 elements is discussed and theoretical patterns are computed for density tapers modeled after -25 dB,-30 dB,-35 dB, and -40 dB circular Taylor distributions. The obtained sidelobe levels and aperture efficiency are better than heretofore reported.