| Issue |
EPJ Web Conf.
Volume 346, 2026
25th Topical Conference on Radio-Frequency Power in Plasmas (RFPPC2025)
|
|
|---|---|---|
| Article Number | 03013 | |
| Number of page(s) | 5 | |
| Section | Radio-Frequency and Microwave Diagnostics and Technology | |
| DOI | https://doi.org/10.1051/epjconf/202634603013 | |
| Published online | 07 January 2026 | |
https://doi.org/10.1051/epjconf/202634603013
Fast impedance matching for the ion cyctron resonance heating system based on capacitors at the EAST tokamak
1 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
2 University of Science and Technology of China, Hefei 230026, China/People’s Republic of China
* Corresponding author: liulunan@ipp.ac.cn
Published online: 7 January 2026
This paper presents an impedance matching system based on real-time feedback control, designed to address impedance mismatching issues in radio frequency (RF) systems. The proposed system integrates a directional coupler, a double-section impedance matcher, a variable capacitor, a servo motor, and a fast real-time impedance matching feedback control system. By measuring forward and reflected power via the directional coupler, the system dynamically adjusts the capacitance to achieve optimal matching. The real-time feedback mechanism controls the servo motor to adjust the capacitor’s value, thereby fine-tuning to the desired level. Experimental results show that the system can significantly reduce reflection power in less than 1 second, demonstrating fast response and high efficiency. The proposed solution is applicable in wireless communication, radar, and RF power transmission systems, offering improved system performance, reduced energy consumption, and enhanced signal quality.
© The Authors, published by EDP Sciences, 2026
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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