Pre-Matching Circuit for High-Frequency Ultrasound Transducers
High-frequency ultrasound transducers offer higher spatial resolution than low-frequency ultrasound transducers; however, their maximum sensitivity are lower. Matching circuits are commonly utilized to increase the amplitude of high-frequency ultrasound transducers because the size of the piezoelect...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/22/8861 |
| _version_ | 1827643622233735168 |
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| author | Hojong Choi |
| author_facet | Hojong Choi |
| author_sort | Hojong Choi |
| collection | DOAJ |
| description | High-frequency ultrasound transducers offer higher spatial resolution than low-frequency ultrasound transducers; however, their maximum sensitivity are lower. Matching circuits are commonly utilized to increase the amplitude of high-frequency ultrasound transducers because the size of the piezoelectric material decreases as the operating frequency of the transducer increases. Thus, it lowers the limit of the applied voltage to the piezoelectric materials. Additionally, the electrical impedances of ultrasound transducers generally differ at the resonant-, center-, and anti-resonant-frequencies. The currently developed most-matching circuits provide electrical matching at the center frequency ranges for ultrasound transmitters and transducers. In addition, matching circuits with transmitters are more difficult to use to control the echo signal quality of the transducers because it is harder to control the bandwidth and gain of an ultrasound transmitter working in high-voltage operation. Therefore, we provide a novel pre-matching circuit method to improve the amplitude and bandwidth of high-frequency ultrasound transducers at the resonant-, center-, and anti-resonant-frequency ranges, with an ultrasound receiver and transducer. To verify the pre-matching circuit, pulse-echo response tests were conducted on the ultrasound transducers. The results show that the designed pre-matching circuits provide higher amplitude (5.63- and 2.02-times) and wider bandwidth (175.55% and 62.01%) for the high-frequency ultrasound transducer compared to the original circuit without a pre-matching circuit, and the parallel capacitor with a series-inductor circuit, respectively; therefore, the proposed pre-matching circuit is an appropriate solution for improving the amplitudes and bandwidths of high-frequency ultrasound transducers over wide frequency ranges. |
| first_indexed | 2024-03-09T17:59:44Z |
| format | Article |
| id | doaj.art-0cb3ff732b9247528e5711f02bfa6c0b |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T17:59:44Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-0cb3ff732b9247528e5711f02bfa6c0b2023-11-24T09:56:58ZengMDPI AGSensors1424-82202022-11-012222886110.3390/s22228861Pre-Matching Circuit for High-Frequency Ultrasound TransducersHojong Choi0Department of Electronic Engineering, Gachon University, Seongnam 13120, Republic of KoreaHigh-frequency ultrasound transducers offer higher spatial resolution than low-frequency ultrasound transducers; however, their maximum sensitivity are lower. Matching circuits are commonly utilized to increase the amplitude of high-frequency ultrasound transducers because the size of the piezoelectric material decreases as the operating frequency of the transducer increases. Thus, it lowers the limit of the applied voltage to the piezoelectric materials. Additionally, the electrical impedances of ultrasound transducers generally differ at the resonant-, center-, and anti-resonant-frequencies. The currently developed most-matching circuits provide electrical matching at the center frequency ranges for ultrasound transmitters and transducers. In addition, matching circuits with transmitters are more difficult to use to control the echo signal quality of the transducers because it is harder to control the bandwidth and gain of an ultrasound transmitter working in high-voltage operation. Therefore, we provide a novel pre-matching circuit method to improve the amplitude and bandwidth of high-frequency ultrasound transducers at the resonant-, center-, and anti-resonant-frequency ranges, with an ultrasound receiver and transducer. To verify the pre-matching circuit, pulse-echo response tests were conducted on the ultrasound transducers. The results show that the designed pre-matching circuits provide higher amplitude (5.63- and 2.02-times) and wider bandwidth (175.55% and 62.01%) for the high-frequency ultrasound transducer compared to the original circuit without a pre-matching circuit, and the parallel capacitor with a series-inductor circuit, respectively; therefore, the proposed pre-matching circuit is an appropriate solution for improving the amplitudes and bandwidths of high-frequency ultrasound transducers over wide frequency ranges.https://www.mdpi.com/1424-8220/22/22/8861high-frequency ultrasound transducerpre-matching circuitultrasound instrument |
| spellingShingle | Hojong Choi Pre-Matching Circuit for High-Frequency Ultrasound Transducers Sensors high-frequency ultrasound transducer pre-matching circuit ultrasound instrument |
| title | Pre-Matching Circuit for High-Frequency Ultrasound Transducers |
| title_full | Pre-Matching Circuit for High-Frequency Ultrasound Transducers |
| title_fullStr | Pre-Matching Circuit for High-Frequency Ultrasound Transducers |
| title_full_unstemmed | Pre-Matching Circuit for High-Frequency Ultrasound Transducers |
| title_short | Pre-Matching Circuit for High-Frequency Ultrasound Transducers |
| title_sort | pre matching circuit for high frequency ultrasound transducers |
| topic | high-frequency ultrasound transducer pre-matching circuit ultrasound instrument |
| url | https://www.mdpi.com/1424-8220/22/22/8861 |
| work_keys_str_mv | AT hojongchoi prematchingcircuitforhighfrequencyultrasoundtransducers |