Optimization of the beampattern of 2D sparse arrays by weighting

Author

Holm, Sverre ; Elgetun, Bjornar

Author_Institution

Dept. of Inf., Oslo Univ., Norway

Volume

2

fYear

1995

fDate

7-10 Nov 1995

Firstpage

1345

Abstract

A method is presented which optimizes weights of general planar 1D and 2D symmetric full and sparse arrays. The objective is to find a weighting of the array elements which gives the minimum sidelobe level of the array pattern in a specified region-the stop-band. The sidelobe level is controlled on a discrete set of points from this region. The method minimizes the Chebyshev norm of the sidelobe level. The method is based on linear programming and is solved with the simplex method. The method removes the large fluctuation in sidelobe level which characterizes random sparse arrays. Examples of optimal weighted 1D and 2D planar arrays are presented

Keywords

Chebyshev approximation; biomedical equipment; biomedical ultrasonics; ultrasonic transducer arrays; 2D sparse arrays; 2D symmetric full arrays; Chebyshev norm; array elements; array pattern; beampattern; general planar 1D arrays; linear programming; minimum sidelobe level; optimization; random sparse arrays; simplex method; stop-band; ultrasound; weighting; Biomedical equipment; Chebyshev approximation; Fluctuations; Informatics; Linear programming; Medical services; Planar arrays; Safety; Ultrasonic imaging; Zinc;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE

Conference_Location

Seattle, WA

ISSN

1051-0117

Print_ISBN

0-7803-2940-6

Type

conf

DOI

10.1109/ULTSYM.1995.495805

Filename

495805