高强度聚焦超声换能器的宽带阻抗匹配

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Abstract In high intensity focused ultrasound(HIFU) therapy system,the impedance matching network should be designed between power supply and ultrasound transducer in order to realize maximum electrical power transmission. Impedance matching network based on passive components can realize exact matching,but the analytical design theory is quite complicated. In this paper,a broadband impedance matching network for the HIFU transducer is designed using simplified real frequency method. The transmission power gain(TPG) is optimized by Levenberg-Marquiardt algorithm to remain as 0.9 smoothly in the frequency band of 200kHz. The acoustic power measurement for HIFU transducer suggests that the broadband impedance matching with TPG optimization can broaden the transducer’s working frequency band effectively.

Key words： Ultrasound transducer high intensity focused ultrasound broadband impedance matching simplified real frequency method Levenberg-Marquardt algorithm

Received: 15 May 2013 Published: 22 January 2015

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TM133

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	Tan Jianwen
	Liao Ruijin
	Deng Sijian
	Zeng Deping

Cite this article:

Tan Jianwen,Liao Ruijin,Deng Sijian等. Broadband Impedance Matching for High Intensity Focused Ultrasound Transducer[J]. Transactions of China Electrotechnical Society, 2014, 29(11): 141-146.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I11/141

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