Impedance matching circuit design for maximum power transfer in Janus Helmholtz transducers

Yoonsang Jeong; Kibae Lee; Hyun Hee Yim; Chong Hyun Lee

doi:10.7776/ASK.2025.44.4.366

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2025 Vol.44, Issue 4 Preview Page Next Page

Research Article

Impedance matching circuit design for maximum power transfer in Janus Helmholtz transducers 야누스 헬름홀츠 트랜스듀서의 최대 전력 전달을 위한 임피던스 정합 회로 설계

31 July 2025. pp. 366-373

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Abstract

The Janus Helmholtz transducer (JHT) is recognized for its high Transmitting Voltage Response (TVR) across a broad frequency range, owing to its dual-resonance characteristics. Achieving optimal power transmission with the JHT typically necessitates an impedance matching circuit. However, conventional impedance matching circuits have limitations in efficiently operating over non-resonant frequency bands with relatively low TVR characteristics and in maximizing active power delivered to the load. To overcome these limitations, this paper introduces a novel impedance matching circuit design approach aimed at maximizing the active power transfer of non-resonant frequency bands. The proposed approach employs an objective function that maximizes effective load power in the non-resonant band, while accounting for the transducer’s transmitting characteristics. The effectiveness of the proposed approach was validated through simulations employing an equivalent circuit model that includes both the cable and the JHT, along with a compact matching circuit comprising resonant components and a coupling capacitor. The simulation results confirmed that the application of the matching circuit increased the effective power delivered to the load from 0.43 mW to 2.13 mW under a 1 Vrms input voltage representing an improvement of up to 4.95 times. In addition, the minimum TVR within the target band improved by more than 5 dB, while the TVR deviation was reduced by over 7 dB.

Keywords

Impedance matching circuit

Maximum power transfer

Janus Helmholtz transducer (JHT)

Transmitting Voltage Response (TVR)

야누스 헬름홀츠 트랜스듀서(Janus Helmholtz transducer, JHT)는 이중 공진 특성으로 인해 넓은 주파수 범위에서 높은 송신 전압 응답(Transmitting Voltage Response, TVR)을 제공한다. JHT에서 최대 전력 전달을 위해서는 일반적으로 임피던스 정합 회로 설계가 필요하다. 그러나 기존의 정합 회로 설계는 상대적으로 낮은 TVR특성을 가지는 비공진 주파수 대역을 효과적으로 정합하지 못하고 부하에 대한 최대 유효 전력 전달에도 한계가 있다. 이러한 한계를 극복하기 위해 본 논문에서는 비공진 대역의 실효 전력 전달을 극대화하기 위한 새로운 임피던스 정합 회로 설계 방법을 제안한다. 제안된 방법은 트랜스듀서의 송신 특성을 고려하여 비공진 대역에서 실효 부하 전력을 최대화하는 목적 함수를 기반으로 한다. 제안된 방법의 유효성을 검증하기 위해 케이블과 JHT의 등가회로 모델을 이용하여 공진 소자와 결합 커패시터로 구성된 소형 정합 회로의 시뮬레이션을 수행하였다. 시뮬레이션 결과, 매칭회로 적용 시 1 Vrms 입력 전압에서 부하에 전달되는 유효 전력이 0.43 mW에서 2.13 mW로 최대 4.95배까지 증가함을 확인하였으며, 대역 내 최소 TVR 성능이 5 dB 이상 증가하고 TVR 편차가 7 dB 이상 감소하였다.

키워드

임피던스 정합회로

최대 전력전달

야누스 헬름홀츠 트랜스듀서

송신전압응답

References

J. Y. Pyun, Y. H. Kim, and K. K. Park, “Design of piezoelectric acoustic transducers for underwater applications,” Sensors, 23, 1821 (2023).

10.3390/s2304182136850418PMC9966007

J. Hu, L. Hong, L. Yin, Y. Lan, H. Sun, and R. Guo, “Research and fabrication of broadband ring flextensional underwater transducer,” Sensors, 21, 1548 (2021).

10.3390/s2104154833672243PMC7926317

W. Liu, X. Mo, T. Wu, and R. Pan, “A distributed parameter model of the Janus-Helmholtz transducer,” J. Acoust. Sco. Am. 155, 681-694 (2024).

10.1121/10.0024468

W. Liu, X. Mo, Y. Chai, T. Wu, and X. Zhang, “Broadband Janus-Helmholtz transducer with various liquid cavity resonances,” Appl. Acoust. 221, 110032 (2024).

10.1016/j.apacoust.2024.110032

Y. Le Gall, D. Boucher, X. Lunon, and A. M. Bruneau, “A 300 Hz Janus-Helmholtz transducer for ocean acoustic tomography,” Proc. OCEANS'93, IEEE, 1278-1281 (1993).

B. H. Lee, J. E. Beak, D. W. Kim, J. M. Lee, and J. Y. Sim, “Optimized design of a sonar transmitter for the high-power control of multichannel acoustic transducers,” Electronics, 10, 2682 (2021).

10.3390/electronics10212682

V. T. Rathod, “A review of electric impedance matching techniques for piezoelectric sensors, actuators and transducers,” Electronics, 8, 169 (2019).

10.3390/electronics8020169

J. Li, W. Huang, W. Shao, X. Li, Z. Shen, J. Xu, J. Shen, and Y. Cui, “An electrical impedance matching method of dual-frequency transducers for ultrasound internal imaging,” Measurement, 221, 113413 (2023).

10.1016/j.measurement.2023.113413

J. Yu, L. Wang, W. Tian, K. Zhang, S. Liao, and Q. Xu, “An adaptive broadband active impedance matching network for underwater electroacoustic transduction system,” IEEE Trans. Ind. Electron. 70, 5433-5443 (2022).

10.1109/TIE.2022.3198258

K. Lee, H. H. Yim, Y. Jeong, J. Lee, and C. H. Lee, “Compact impedance matching circuit for wideband power transfer in Janus Helmholtz transducers,” J. Mar. Sci. Eng. 13, 898 (2025).

10.3390/jmse13050898

A. Bevilacqua and A. Mazzanti, “Doubly-tuned transformer networks: A tutorial,” IEEE Trans. Circuits Syst. II: Express Briefs, 68, 550-555 (2020).

10.1109/TCSII.2020.3046021

G. Manoj, R. Ramesh, and S. O. Kundukulam, “Impedance matching network of passive coupler with coaxial cable for airborne sonar applications,” Adv. Mil. Technol. 18, 51-68 (2023).

10.3849/aimt.01763

J. D. Irwin and R. M. Nelms, Basic Engineering Circuit Analysis (John Wiley & Sons, Hoboken, 2015), pp. 179-181.

E. Mezura-Montes, and C. A. Coello Coello, “Constraint-handling in nature-inspired numerical optimization: past, present and future,” Swarm Evol. Comput. 1, 173-194 (2011).

10.1016/j.swevo.2011.10.001

Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 44
No :4
Pages :366-373
Received Date : 2025-05-23
Revised Date : 2025-07-01
Accepted Date : 2025-07-10
DOI :https://doi.org/10.7776/ASK.2025.44.4.366

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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