Results 1 to 10 of about 16,196 (251)

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

Sensors, 2017
For achieving the power maximum transmission, the electrical impedance matching (EIM) for piezoelectric ultrasonic transducers is highly required.
Yuan Yang, Xiaoyuan Wei, Lei Zhang, Wenqing Yao   +3 more
doaj   +7 more sources

Design of a Broadband Electrical Impedance Matching Network for Piezoelectric Ultrasound Transducers Based on a Genetic Algorithm [PDF]

Sensors, 2014
An improved method based on a genetic algorithm (GA) is developed to design a broadband electrical impedance matching network for piezoelectric ultrasound transducer.
Jianfei An, Kezhu Song, Shuangxi Zhang, Junfeng Yang, Ping Cao   +4 more
doaj   +7 more sources

A Filter Structure Based Broadband Electrical Impedance Matching Method for Piezoelectric Transducer of Acoustic Well-Logging

IEEE Access, 2022
Piezoelectric transducer is a key component of acoustic well-logging tool. Transducers used in acoustic well-logging tools usually have limited bandwidth, and their dominant frequencies severely drift with drastic change of borehole temperature when ...
Yongchao Yao, Baohai Tan, Zhanxiang He, Xianping Liu   +3 more
doaj   +3 more sources

A Novel Thickness-Mode Broadband Piezoelectric Ultrasonic Transducer Design Based on Double-Layer Piezoelectric Structure and a Variable-Thickness Matching Layer [PDF]

Sensors
A novel broadband ultrasonic transducer design based on a non-uniform-thickness double-layer piezoelectric structure and a variable-thickness matching layer is proposed to overcome the limitations of conventional thickness-mode piezoelectric ultrasonic ...
Qiao Wu, Aofeng Geng, Wenlin Feng, Meng Yao, Chao Hu   +4 more
doaj   +2 more sources

High-Frequency and High-Current Transmission Techniques for Multiple Earth Electrical Characteristic Measurement Systems Based on Adaptive Impedance Matching through Phase Comparison

Sensors
With the increase in groundwater exploration, underground mineral resource exploration, and non-destructive investigation of cultural relics, high-resolution earth electrical characteristic measurement has emerged as a mainstream technique owing to its ...
Kuiyuan Zhang, Shulin Yang, Meng Wang, Rongbo Zhang   +3 more
doaj   +3 more sources

Design Theory of Equal Split Dual- Band Power Divider without Reactive Elements

Advanced Electromagnetics, 2022
In this paper, a design approach for getting dual-band working in a Wilkinson-based power divider (WPD) without adding any reactive elements or open- or short-circuited stubs is presented.
Natarajamani S, Rekha G. Nair
doaj   +3 more sources

Study on Electrical Impedance Matching for Broadband Ultrasonic Transducer

Journal of the Korean Society for Nondestructive Testing, 2017
Ki-Bok Kim, Geonwoo Kim
exaly   +3 more sources

Estimation Method of an Electrical Equivalent Circuit for Sonar Transducer Impedance Characteristic of Multiple Resonance

Sensors, 2023
Improving the operational efficiency and optimizing the design of sound navigation and ranging (sonar) systems require accurate electrical equivalent models within the operating frequency range.
Jejin Jang, Jaehyuk Choi, Donghun Lee, Hyungsoo Mok   +3 more
doaj   +1 more source

Compact Load Network Having a Controlled Electrical Length for Doherty Power Amplifier

IEEE Access, 2022
The load network of the carrier amplifier for the conventional Doherty power amplifier (DPA) consists of an impedance matching circuit, an offset line, and a $\lambda $ /4 transmission line (TL), so that the overall electrical length of the network can ...
Kuhyeon Kwon, Woojin Choi, Jaekyung Shin, Yifei Chen, Young Chan Choi, Sooncheol Bae, Hyeongjin Jeon, Jiwon Hwang, Seungmin Woo, Young Yun Woo, Kang-Yoon Lee, Keum Cheol Hwang, Youngoo Yang   +12 more
doaj   +1 more source

GHz operation of a quantum point contact using stub-impedance matching circuit

Physics Open, 2023
Quantum point contacts (QPC) are the building blocks of quantum dot qubits and semiconducting quantum electrical metrology circuits. QPCs also make highly sensitive electrical amplifiers with the potential to operate in the quantum-limited regime. Though
Anusha Shanmugam, Prasanta Kumbhakar, Harikrishnan Sundaresan, Annu Anns Sunny, J.L. Reno, Madhu Thalakulam   +5 more
doaj   +1 more source