کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5500506 | 1534259 | 2017 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Conformal array realizations of the near and far fields of a complex point source
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Conformal array realizations of the near and far fields of a complex point source Conformal array realizations of the near and far fields of a complex point source](/preview/png/5500506.png)
چکیده انگلیسی
The complex point source radiates an unusual field without sidelobes in both the near and far zones. The field on a sphere in the near zone closely resembles the far-field pattern. These properties make the complex point-source field desirable in numerous applications in electromagnetics and acoustics. The complex point-source field will be generated using non-resonant arrays with properties that can be realized in the laboratory. Both standard and weighted least-squares techniques determine the array excitation coefficients. The number of array elements required to achieve a certain accuracy of the radiated field can be dramatically reduced if a conformal array structure is employed with the array elements mounted on an impenetrable object. Only the part of the impenetrable object that faces in the beam direction need to be populated with array elements. Numerical examples with array elements consisting of real point sources mounted on a Dirichlet sphere illustrate these findings.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Wave Motion - Volume 72, July 2017, Pages 1-12
Journal: Wave Motion - Volume 72, July 2017, Pages 1-12
نویسندگان
Thorkild B. Hansen,