High Frequency Broadband Arbitrary Coded Excitation in Ultrasound Microscopy

被引：0
|
作者：
Merilainen, A. I. [1 ]
Fabritius, T. [1 ]
Eskelinen, J. [1 ]
Haeggstrom, E. [1 ]
机构：
[1] Univ Helsinki, Dept Phys, Div Mat Sci, Helsinki, Finland
来源：
2012 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS) | 2012年
关键词：
D O I：
10.1109/ULTSYM.2012.0614
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We built a 200+ MHz ultrasound microscope that can employ broad band arbitrary coded signals. Our solution is based on quadrature modulation and T/R-switching. We show that the instrument works with linear and non-linear chirp signals (100 300MHz). We imaged a 5 mu m tall MEMS step structure with our device and with a commercial pulser, the results were comparable. Cross-talk from the local oscillator in the quadrature modulator affects the pulse compression. This limits the use of codes at the oscillator frequency.
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页数：4
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