Optimum design of multisection two-way high-power dividers for unequal power division and impedance matching

2012 ◽  
Vol 6 (4) ◽  
pp. 426 ◽  
Author(s):  
H. Oraizi ◽  
A.R. Sharifi
Keyword(s):  
Optimum Design ◽  
High Power ◽  
Impedance Matching ◽  
Power Dividers

Impedance Matching between Signal Generator and Piezoelectric Transducer

2012 ◽  
Vol 472-475 ◽  
pp. 1488-1491
Author(s):  
Zhen Jiang Tan ◽  
Ming Zhou
Keyword(s):  
High Power ◽  
Piezoelectric Transducer ◽  
Perfect Matching ◽  
Impedance Matching ◽  
Signal Generator ◽  
Matching Theory ◽  
Signal Source ◽  
Key Technology ◽  
Power Pulse ◽  
High Power Pulse

In order to acquire enough energy, high power pulse must be used to drive a piezoelectric transducer. At the same time, it is a key technology to design an impedance matching circuit between a signal generator and a piezoelectric transducer so that signal source can transmit energy to the piezoelectric transducer effectively. In the paper, the impedance matching theory is analyzed. And, a method of using an oscilloscope to measure resonance frequency of the piezoelectric transducer is tested, through which, a perfect matching circuit is designed.

scholarly journals Piezoelectric Energy Harvesting with an Ultrasonic Vibration Source

Actuators ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 8
Author(s):  
Tao Li ◽  
Pooi Lee
Keyword(s):  
Energy Harvesting ◽  
High Power ◽  
High Frequency ◽  
Energy Harvester ◽  
Impedance Matching ◽  
Low Frequency ◽  
Vibration Source ◽  
Piezoelectric Energy ◽  
Power Ultrasonic ◽  
Ultrasonic Cutting

A piezoelectric energy harvester was developed in this paper. It is actuated by the vibration leakage from the nodal position of a high-power ultrasonic cutting transducer. The harvester was excited at a low displacement amplitude (0.73 µmpp). However, its operation frequency is quite high and reaches the ultrasonic range (24.4 kHz). Compared with another low frequency harvester (66 Hz), both theoretical and experimental results proved that the advantages of this high frequency harvester include (i) high current generation capability (up to 20 mApp compared to 1.3 mApp of the 66 Hz transducer) and (ii) low impedance matching resistance (500 Ω in contrast to 50 kΩ of the 66 Hz transducer). This energy harvester can be applied either in sensing, or vibration controlling, or simply energy harvesting in a high-power ultrasonic system.

Low loss, fully-printed, ferroelectric varactors for high-power impedance matching at low ISM band frequency

2019 ◽  
Vol 11 (7) ◽  
pp. 658-665
Author(s):  
Daniel Kienemund ◽  
Nicole Bohn ◽  
Thomas Fink ◽  
Mike Abrecht ◽  
Walter Bigler ◽  
...  
Keyword(s):  
High Power ◽  
Power Level ◽  
Impedance Matching ◽  
Input Power ◽  
Low Loss ◽  
Band Frequency ◽  
Power Matching ◽  
Metal Insulator Metal ◽  
Ferroelectric Varactors ◽  
Suppression Technique

AbstractLow loss, ferroelectric, fully-printed varactors for high-power matching applications are presented. Piezoelectric-induced acoustic resonances reduce the power handling capabilities of these varactors by lowering the Q-factor at the operational frequency of 13.56 MHz. Here, a quality factor of maximum 142 is achieved with an interference-based acoustic suppression approach utilizing double metal–insulator–metal structures. The varactors show a tunability of maximum 34% at 300 W of input power. At a power level of 1 kW, the acoustic suppression technique greatly reduces the dissipated power by 62% from 37 W of a previous design to 14.2 W. At this power level, the varactors remain tunable with maximum 18.2% and 200 V of biasing voltage.

Wideband Gysel HMSIW power divider with high power-handling capability

2018 ◽  
Vol 10 (3) ◽  
pp. 308-312
Author(s):  
Kaijun Song ◽  
Te Kong ◽  
Yu Zhu ◽  
Hongxing Xu ◽  
Lifei Jiang ◽  
...  
Keyword(s):  
High Power ◽  
Reasonable Agreement ◽  
Impedance Matching ◽  
Power Divider ◽  
Mode Analysis ◽  
Analysis Method ◽  
Input Output ◽  
Output Impedance ◽  
Power Handling ◽  
Power Handling Capability

AbstractA novel Gysel power divider with high power-handling capability based on half-mode substrate integrated waveguide (HMSIW) has been presented in this paper. A HMSIW ring is used and good input/output impedance matching is achieved based on HMSIW-microstrip taper transition. Two microstrip stubs are introduced in HMSIW ring to assemble two isolation resistors to improve the isolation between the output ports. The even- and odd-mode analysis method is used for the presented circuit. A prototype of the presented power divider is designed, fabricated, and measured. The measured results show a reasonable agreement with the simulated ones.

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