| ABSTRACT: | STUDY OF MIXING FREQUENCY PHASED ARRAY
Xiang Yong 1 , Peng Chun 2 , Peng Xuelian 1 , Keren Shi 3 , Xu Xigang 1 , Sun Wenlong 1
1 Time Group. Beijing , China, 2 Peking University Health Science Center Beijing, China, 3 NDT&E Lab., Dept. of Mechanical, Tsinghua University, Beijing, China
A new method of ultrasound phased array Mixing frequency Phased Array(MPA)
in which elements excite respective frequency they may be not same each other and as well as
normal phased array can focus and deflect is presented. In this paper, we discuss the theory of
MPA based on interference principle, and simulate the distribution of MPA’s sound field.
Conclusionally, pressure intensity in focal area of MPA is enhanced observably, and range to be
scanned which has effective contrast resolution is enlarged. This is specially useful for
applications where HIFU therapy with more powerful energy and ultrasound imaging
diagnostication with improvement of signal to noise ratio(SNR), attainability of beamforming and
uniformity of imaging quality.
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