Influence of phase errors on beam-steered phased arrays

For the image quality of two-dimensional ultrasound systems, spatial resolution is one of the most important parameters. This resolution is determined by the directivity pattern. In practice, the directivity pattern of phased arrays will be distorted due to errors in critical components. In a previo...

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Bibliographic Details
Published in:Ultrasonics 1987-05, Vol.25 (3), p.154-159
Main Authors: Lancée, C.T., Vissers, J.M., Mientki, S., Ligtvoet, C.M., Bom, N.
Format: Article
Language:English
Subjects:
Acoustics
directivity patterns
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
phase errors
phased arrays
Physics
Transduction
acoustical devices for the generation and reproduction of sound
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Summary:For the image quality of two-dimensional ultrasound systems, spatial resolution is one of the most important parameters. This resolution is determined by the directivity pattern. In practice, the directivity pattern of phased arrays will be distorted due to errors in critical components. In a previous study the influence of amplitude errors has been dealt with. In this second study, the parameters describing the range and the nature of phase errors are derived. With these parameters a qualitative prediction of the directivity pattern seems to be possible. Within the design limits of a given phased array, means are indicated to minimize the beam distortion due to occurring phase errors.
ISSN:0041-624X
1874-9968
DOI:10.1016/0041-624X(87)90022-9