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

Electronics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 169 ◽  
Author(s):  
Vivek T. Rathod
Keyword(s):  
Transmission Lines ◽  
Power Supply ◽  
Electrical Impedance ◽  
Impedance Matching ◽  
Careful Consideration ◽  
Piezoelectric Sensors ◽  
Electric Signal ◽  
Electric Impedance ◽  
The Common ◽  
Matching Techniques

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.

scholarly journals A trade-off design of microstrip broadband power amplifier for UHF applications

2020 ◽  
Vol 10 (1) ◽  
pp. 919
Author(s):  
Mohamed Ribate ◽  
Rachid Mandry ◽  
Jamal Zbitou ◽  
Larbi El Abdellaoui ◽  
Ahmed Errkik ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Transmission Lines ◽  
Impedance Matching ◽  
Wave Impedance ◽  
Large Signal ◽  
Active Device ◽  
Quarter Wave ◽  
Lumped Elements ◽  
Signal Simulation ◽  
Matching Techniques

In this paper, the design of a Broadband Power Amplifier for UHF applications is presented. The proposed BPA is based on ATF13876 Agilent active device. The biasing and matching networks both are implemented by using microstrip transmission lines. The input and output matching circuits are designed by combining two broadband matching techniques: a binomial multi-section quarter wave impedance transformer and an approximate transformation of previously designed lumped elements. The proposed BPA shows excellent performances in terms of impedance matching, power gain and unconditionally stability over the operating bandwidth ranging from 1.2 GHz to 3.3 GHz. At 2.2 GHz, the large signal simulation shows a saturated output power of 18.875 dBm with an output 1-dB compression point of 6.5 dBm of input level and a maximum PAE of 36.26%.

scholarly journals A Review of Acoustic Impedance Matching Techniques for Piezoelectric Sensors and Transducers

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 4051 ◽  
Author(s):  
Vivek T. Rathod
Keyword(s):  
Acoustic Impedance ◽  
Signal To Noise Ratio ◽  
Impedance Matching ◽  
Acoustic Properties ◽  
Piezoelectric Sensors ◽  
Advantages And Disadvantages ◽  
The Difference ◽  
Matching Techniques ◽  
Passive Materials ◽  
Propagation Media

The coupling of waves between the piezoelectric generators, detectors, and propagating media is challenging due to mismatch in the acoustic properties. The mismatch leads to the reverberation of waves within the transducer, heating, low signal-to-noise ratio, and signal distortion. Acoustic impedance matching increases the coupling largely. This article presents standard methods to match the acoustic impedance of the piezoelectric sensors, actuators, and transducers with the surrounding wave propagation media. Acoustic matching methods utilizing active and passive materials have been discussed. Special materials such as nanocomposites, metamaterials, and metasurfaces as emerging materials have been presented. Emphasis is placed throughout the article to differentiate the difference between electric and acoustic impedance matching and the relation between the two. Comparison of various techniques is made with the discussion on capabilities, advantages, and disadvantages. Acoustic impedance matching for specific and uncommon applications has also been covered.

scholarly journals Design of a Broadband Electrical Impedance Matching Network for Piezoelectric Ultrasound Transducers Based on a Genetic Algorithm

Sensors ◽  
2014 ◽  
Vol 14 (4) ◽  
pp. 6828-6843 ◽  
Author(s):  
Jianfei An ◽  
Kezhu Song ◽  
Shuangxi Zhang ◽  
Junfeng Yang ◽  
Ping Cao
Keyword(s):  
Genetic Algorithm ◽  
Electrical Impedance ◽  
Impedance Matching ◽  
Ultrasound Transducers ◽  
Matching Network

Modified methodology of computation of admissible continuous currents of plain conductors of overhead transmission lines and catenaries

2021 ◽  
Vol 2 (2) ◽  
pp. 36-43
Author(s):  
Evgeniy P. FIGURNOV ◽  
◽  
Yury I. ZHARKOV ◽  
Valeriy I. KHARCHEVNIKOV ◽  
◽  
...  
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Transmission Lines ◽  
Power Transmission ◽  
Convection Heat Transfer ◽  
Heating And Cooling ◽  
Continuous Current ◽  
The Subject ◽  
The Common ◽  
Overhead Power Transmission Line

Methodology provided summarizes published, original and foreign theoretic and experimental data on the subject of heating and cooling of standard and shaped conductors of overhead power transmission line and uses those of them which are most affected to fundamental heat-transfer laws. Computation surface area of standard and shaped wire formulas are given. The common formula of convection heat transfer coefficient is provided, based on wind speed and direction, concerning antiicing mode. Parameters of this formula do not coincide with those existing, as they are based on experimental data on standard and shaped conductors but not on round tubes. Formula of computation of heat transfer power under the influence of solar radiation is given. Summarized formula of admissible continuous current computation is given, all the components have detailed description in the article.

Parasitic aware impedance matching techniques for RF amplifiers

2011 ◽  
Vol 70 (1) ◽  
pp. 91-102 ◽  
Author(s):  
K. Dasgupta ◽  
A. Dutta ◽  
T. K. Bhattacharyya
Keyword(s):  
Impedance Matching ◽  
Rf Amplifiers ◽  
Matching Techniques

scholarly journals Neurally Adjusted Ventilatory Assistance and Synchronized Intermittend Mandatory Ventilation in Children Assessed by Electrical Impedance Segmentography: A Prospective Randomized Case-Control Crossover Trial

2021 ◽  
Author(s):  
Jennifer Bettina Brandt ◽  
Alex Mahlknecht ◽  
Tobias Werther ◽  
Roman Ullrich ◽  
Michael Hermon
Keyword(s):  
Electrical Impedance ◽  
Crossover Trial ◽  
Case Control ◽  
Dynamic Monitoring ◽  
Limiting Factors ◽  
Neurally Adjusted Ventilatory Assist ◽  
Electric Impedance ◽  
Intermittent Mandatory Ventilation ◽  
Tertiary Center ◽  
Ventilatory Assist

Abstract Background: Assessing relative differences of integrated impedance as a surrogate of volume changes between neurally adjusted ventilatory assist (NAVA) and synchronized intermittent mandatory ventilation (SIMV) by using electric impedance segmentography in children.Methods: Performed as a prospective randomized case-control crossover trial in a pediatric intensive care unit of a tertiary center including eight mechanically-ventilated children, four sequences of two different ventilation modes were consecutively applied. The children were randomized in two groups; one that was started on neurally adjusted ventilatory assist and the other on synchronized intermittent mandatory ventilation. During ventilation, electric impedance segmentography measurements were recorded.Results: The relative difference of vertical impedance between both ventilatory modes was measured (median 0.52, IQR 0-0.87). These differences in left apical lung segments were present during the first (median 0.58, IQR 0-0.89, p=0.04) and second crossover (median 0.50, IQR 0-0.88, p=0.05) as well as across total impedance (0.52 IQR 0-0.87; p=0.002). During neurally adjusted ventilatory assist children showed a shift of impedance towards caudal lung segments, compared to synchronized intermittent mandatory ventilation.Conclusion: Electrical impedance segmentography enables dynamic monitoring of transthoracic impedance. Segmental measurements, however, were of low reproducibility due to various limiting factors in its application. For further evaluation, larger prospective clinical trials are necessary.

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