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首页> 外文会议>Annual Symposium on Quantitative Nondestructive Evaluation; 19980719-24; Snowbird,UT(US) >A DESIGN STRATEGY FOR PHASED ARRAYS
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A DESIGN STRATEGY FOR PHASED ARRAYS

机译：分阶段阵列的设计策略

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摘要

In the paper, the effects of transducer parameters on the beam directivity and pressure in the steering direction were studied, which include number of elements, inter-element spacing, element size, steering angle and aperture length. The criteria considered are (1) minimization of main lobe width, (2) elimination of grating lobes, (3) suppression of side lobes, and (4) maximization of pressure in the steering direction. The first objective is fulfilled by increasing N and/or d, whereas the second objective can be achieved by limiting the inter-element spacing below its critical value. The third objective can be attained only by increasing N, and the fourth objective can be realized by increasing N or a. By understanding of the effects of the design parameters, a guideline for optimal design was suggested, which also incorporates practical conditions. The most important point is to use the largest number of elements practically possible, since the main lobe width remains the same for constant aperture length while increased N reduces the side lobe levels and boosts the pressure in the steering direction.
机译：本文研究了换能器参数对光束指向性和转向方向压力的影响，包括元件数量，元件间间距，元件尺寸，转向角和孔径长度。考虑的标准是（1）最小化主瓣宽度，（2）消除光栅瓣，（3）抑制旁瓣，以及（4）最大化转向方向的压力。第一个目标通过增加N和/或d来实现，而第二个目标可以通过将元素间距限制在其临界值以下来实现。仅通过增加N可以实现第三个目标，而通过增加N或a可以实现第四个目标。通过了解设计参数的影响，提出了优化设计的指南，其中还包含了实际条件。最重要的一点是尽可能使用尽可能多的元件，因为对于恒定的孔径长度，主瓣宽度保持不变，而增加的N会降低旁瓣水平并增加转向方向的压力。

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