Electrical impedance matching networks based on filter structures for high frequency ultrasound transducers

Moon, Ju-Young; Lee, Junsu; Chang, Jin Ho

doi:10.1016/j.sna.2016.10.025

Cited by 37 publications

(20 citation statements)

References 18 publications

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“…Moon et al [120] presented a filter structure based electrical impedance matching network for high-frequency ultrasound transducers. Figure 9 shows the EIMN where two reactive components are connected to the transducer in series and in parallel when the electrical impedance of a system is larger than that of a transducer |Z s | > |Z x | and vice versa |Z x | > |Z s |.…”

Section: Filter Structure Based Networkmentioning

confidence: 99%

“…Schematic circuitry of the EIMN in the case where the electrical impedance magnitude of a system is larger than that of a transducer based on Low-pass (left) and high-pass (right) filter structures. L s and L p indicate series and parallel inductors and C s and C p are series and parallel capacitors[120].…”

mentioning

confidence: 99%

“…Needle ultrasonic transducer with filter based electric impedance matching network. Reproduced with permission from Reference[120], Copyright Elsevier, 2016.…”

mentioning

confidence: 99%

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A Review of Electric Impedance Matching Techniques for Piezoelectric Sensors, Actuators and Transducers

Rathod

2019

Electronics

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Any electric transmission lines involving the transfer of power or electric signal requires the matching of electric parameters with the driver, source, cable, or the receiver electronics. Proceeding with the design of electric impedance matching circuit for piezoelectric sensors, actuators, and transducers require careful consideration of the frequencies of operation, transmitter or receiver impedance, power supply or driver impedance and the impedance of the receiver electronics. This paper reviews the techniques available for matching the electric impedance of piezoelectric sensors, actuators, and transducers with their accessories like amplifiers, cables, power supply, receiver electronics and power storage. The techniques related to the design of power supply, preamplifier, cable, matching circuits for electric impedance matching with sensors, actuators, and transducers have been presented. The paper begins with the common tools, models, and material properties used for the design of electric impedance matching. Common analytical and numerical methods used to develop electric impedance matching networks have been reviewed. The role and importance of electrical impedance matching on the overall performance of the transducer system have been emphasized throughout. The paper reviews the common methods and new methods reported for electrical impedance matching for specific applications. The paper concludes with special applications and future perspectives considering the recent advancements in materials and electronics.

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Section: Filter Structure Based Networkmentioning

confidence: 99%

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confidence: 99%

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A Review of Electric Impedance Matching Techniques for Piezoelectric Sensors, Actuators and Transducers

Rathod

2019

Electronics

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“…The two elements were designed to have center frequencies of 35 MHz for ultrasound transmission and 105 MHz for the reception of the third harmonic, respectively. High efficient transmission and reception of ultrasound require electrical impedance matching between a transducer and an imaging system (or signal wires) [ 22 ]. At a given element size, the 105-MHz element inevitably has a much lower electrical impedance than the 35-MHz element if the same piezoelectric material is used [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

A 35 MHz/105 MHz Dual-Element Focused Transducer for Intravascular Ultrasound Tissue Imaging Using the Third Harmonic

Lee

Moon

Chang

2018

Sensors

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The superharmonic imaging of tissue has the potential for high spatial and contrast resolutions, compared to the fundamental and second harmonic imaging. For this technique, the spectral bandwidth of an ultrasound transducer is divided for transmission of ultrasound and reception of its superharmonics (i.e., higher than the second harmonic). Due to the spectral division for the transmission and reception, transmitted ultrasound energy is not sufficient to induce superharmonics in media without using contrast agents, and it is difficult that a transducer has a −6 dB fractional bandwidth of higher than 100%. For the superharmonic imaging of tissue, thus, multi-frequency array transducers are the best choice if available; transmit and receive elements are separate and have different center frequencies. However, the construction of a multi-frequency transducer for intravascular ultrasound (IVUS) imaging is particularly demanding because of its small size of less than 1 mm. Here, we report a recently developed dual-element focused IVUS transducer for the third harmonic imaging of tissue, which consists of a 35-MHz element for ultrasound transmission and a 105-MHz element for third harmonic reception. For high quality third harmonic imaging, both elements were fabricated to have the same focus at 2.5 mm. The results of tissue mimicking phantom tests demonstrated that the third harmonic images produced by the developed transducer had higher spatial resolution and deeper imaging depth than the fundamental images.

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“…et al designed two-element transmission line matching circuits based on network theory [ 13 ], Moon J.Y. et al proposed electrical matching networks based on filter structures [ 14 ], and Kim M.G. et al presented an approach for the design of impedance matching network based on impedance analysis [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Electrical Impedance Matching on the Electromechanical Characteristics of Sandwiched Piezoelectric Ultrasonic Transducers

Yang

Wei

Zhang

et al. 2017

Sensors

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For achieving the power maximum transmission, the electrical impedance matching (EIM) for piezoelectric ultrasonic transducers is highly required. In this paper, the effect of EIM networks on the electromechanical characteristics of sandwiched piezoelectric ultrasonic transducers is investigated in time and frequency domains, based on the PSpice model of single sandwiched piezoelectric ultrasonic transducer. The above-mentioned EIM networks include, series capacitance and parallel inductance (I type) and series inductance and parallel capacitance (II type). It is shown that when I and II type EIM networks are used, the resonance and anti-resonance frequencies and the received signal tailing are decreased; II type makes the electro-acoustic power ratio and the signal tailing smaller whereas it makes the electro-acoustic gain ratio larger at resonance frequency. In addition, I type makes the effective electromechanical coupling coefficient increase and II type makes it decrease; II type make the power spectral density at resonance frequency more dramatically increased. Specially, the electro-acoustic power ratio has maximum value near anti-resonance frequency, while the electro-acoustic gain ratio has maximum value near resonance frequency. It can be found that the theoretically analyzed results have good consistency with the measured ones.

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Electrical impedance matching networks based on filter structures for high frequency ultrasound transducers

Cited by 37 publications

References 18 publications

A Review of Electric Impedance Matching Techniques for Piezoelectric Sensors, Actuators and Transducers

A Review of Electric Impedance Matching Techniques for Piezoelectric Sensors, Actuators and Transducers

A 35 MHz/105 MHz Dual-Element Focused Transducer for Intravascular Ultrasound Tissue Imaging Using the Third Harmonic

The Effect of Electrical Impedance Matching on the Electromechanical Characteristics of Sandwiched Piezoelectric Ultrasonic Transducers

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