Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Mesh Analysis for AC Circuits01:12

Mesh Analysis for AC Circuits

780
In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
780
Cut-off Frequency of BJT01:17

Cut-off Frequency of BJT

1.5K
Cut-off frequencies in Bipolar Junction Transistors (BJTs) mark the transition between the signal's pass band and stop band, influencing their performance in amplifying or attenuating frequencies. These frequencies are crucial for designing BJTs to meet specific operational requirements in electronic circuits.
Alpha Cut-Off Frequency: Pertinent to the common-base configuration, the alpha cut-off frequency defines the upper-frequency limit at which the current gain, alpha, remains stable. As...
1.5K
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

2.0K
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
2.0K
Fast Decoupled and DC Powerflow01:24

Fast Decoupled and DC Powerflow

843
The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
843
Biasing of FET01:22

Biasing of FET

916
Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
916
Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

789
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
789

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Machine Learning-Based Identification of Tamoxifen Resistance-Associated Genes and Their Application in Prognostic Modeling of Breast Cancer.

Journal of visualized experiments : JoVE·2026
Same author

Potentially toxic elements in tailing-contaminated soils of Tongling, China: Pollution status, health risks and environmental capacity.

Environmental research·2026
Same author

Effects of Liuzijue Qigong on respiratory function, trunk control, and balance after stroke: a randomized controlled trial.

Frontiers in aging neuroscience·2026
Same author

All-Visible Light-Activated Photoswitching of Diarylethenes via Direct Triplet Sensitization From Low-Toxicity ZnSe/ZnS Quantum Dots.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Case Report: Pulmonary brucellosis presenting as multiple cavitary lung lesions on imaging.

Frontiers in medicine·2026
Same author

Effects of wheat starch-myristic acid complex on glucose and lipid metabolism in hyperglycemic Drosophila melanogaster.

International journal of biological macromolecules·2026

Related Experiment Video

Updated: Mar 29, 2026

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

6.7K

Design and Experimental Validation of a Dynamic Frequency Sweeping Algorithm for Optimized Impedance Matching in

Zhaolong Fan1, Zhifeng Wang2, Long Xu1

  • 1Jihua Laboratory, Foshan 528200, China.

Micromachines
|March 28, 2026
PubMed
Summary

This study introduces a dynamic frequency sweeping algorithm for RF power sources, optimizing impedance matching during pulsed operation. The adaptive algorithm ensures efficient power transfer by minimizing reflected power in real-time.

Keywords:
adaptive algorithmdynamic frequency sweepingimpedance matchingpower transfer efficiencypulse-mode operation

More Related Videos

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
11:44

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Published on: August 15, 2014

10.8K
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

17.7K

Related Experiment Videos

Last Updated: Mar 29, 2026

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

6.7K
Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
11:44

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Published on: August 15, 2014

10.8K
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

17.7K

Area of Science:

  • Radio Frequency (RF) Engineering
  • Plasma Physics
  • Control Systems

Background:

  • Optimizing impedance matching is crucial for efficient power transfer in RF systems.
  • Pulsed RF power sources require adaptive impedance matching due to dynamic load variations.
  • Existing methods may struggle with the rapid transitions and constraints of pulse-mode operation.

Purpose of the Study:

  • To design and implement a dynamic frequency sweeping algorithm for a 3 kW RF power source operating in pulse mode.
  • To achieve optimal impedance matching by aligning source and load impedances.
  • To maximize power transfer efficiency and minimize reflected power under dynamic load conditions.

Main Methods:

  • Utilized the maximum power transfer theorem for impedance matching.
  • Developed an algorithm with adaptive step size adjustments and predictive frequency initialization.
  • Integrated real-time impedance monitoring and synchronization with pulse signals.
  • Employed a 13.56 MHz, 3 kW Automatic Sweep Generator testbed for validation.

Main Results:

  • Demonstrated a linear and stable frequency sweep within the pulse "ON" time (TON).
  • Achieved efficient impedance matching and significantly reduced reflected power.
  • Validated the algorithm's fast convergence within 5.0172 ms.
  • Confirmed the algorithm's effectiveness under 20 kHz pulse modulation with a 50% duty cycle.

Conclusions:

  • The dynamic frequency sweeping algorithm effectively optimizes impedance matching in pulsed RF systems.
  • Adaptive techniques are vital for achieving high precision in dynamic RF applications like plasma excitation.
  • The algorithm shows potential for improving efficiency and stability in demanding RF applications.