Janis Blahins, Aigars Apsitis, Arman Bzhishkian

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This article describes designer's experience with radiofrequency (RF) high reactive power capacitors problems, which in many cases may be a critical element for various devices - like ICP plasma torches; SMPS converters; induction heaters; radio transmitters etc. New materials at the markets allow to solve the problem that at small capacitance - high voltage - high amperage combination, capacitors have to withstand circulating reactive power load from kVAR to MVAR range, hence the value of loss factor tan(δ) of the selected insulator material has a critical role, to minimize overheating. Few designer strategies are disputed, and convincing experimental data on selected new industrial materials are presented.


capacitor heat-up, RF reactive power, design choices, new industrial dielectrics, power capacitor loss

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R. A. Ganeev, High-Order Harmonic Generation in Laser Plasma Plumes. Imperial College Press, London, 2012.

High-Kvar capacitors datasheets. Available at: (all web data last accessed at autumn 2022).

Passive Plus Inc. High Q/Low ESR Ceramic & broadband capacitors, Canada, 2023.

J-H. Hwang, J. Andresakis, E. Feinberg, B. Carter, Y. Kageyama, F. Kuwako, "RF Capacitor Material for Use in Printed Circuit Board", In Proceedings of the IPC APEX EXPO Conference, 2013, pp. 1-4.

R. J. Sanville, Patent US20010014004A1: Parallel plate buried capacitor, 1999. Available at

Z. Xing, Z. Gu, C. Zhang, S. Guo, H. Cui, Q. Lei and G. Li. "Influence of Space Charge on Dielectric Property and Breakdown Strength of Polypropylene Dielectrics under Strong Electric Field", Energies, vol. 15, no. 12, p. 4412, 2022.

K. Dziarski, A. Hulewicz and G. Dombek, "Thermographic Measurement of the Temperature of Reactive Power Compensation Capacitors", Energies vol. 14, no. 18, p. 5736, 2021.

Y. Zhang, J. Chen, H. Dan, M. Maraj, B. Peng and W. Sun, "Energy Storage and Electrocaloric Cooling Performance of Advanced Dielectrics", Molecules vol. 26, no. 2, p. 481, 2021.

S. A. Odhiambo, G. De Mey, C. Hertleer and L. Van Langenhove, "Dielectric Absorption in Pedot:Pss Capacitors With Stainless Steel Yarn Electrodes in Textile Substrates", FU Elec. Energ., vol 35, no. 1, pp. 137-143, 2022.

G. Tagliapietra and J. Iannacci (2021). "A Comprehensive Overview of Recent Developments in RF-Mems Technology-Based High-Performance Passive Components For Applications in the 5G And Future Telecommunications Scenarios". FU Elec. Energ., vol. 34, no. 3, pp. 333-366, 2021.

A. A. Brandt, Research of dielectrics at ultrahigh frequencies. State publisher of physics-mathematics, Moscow, 1963 (in Russian А. А. Брандт, Исследование диелектриков на сверхвысоких частотах, Госиздательство физико-математической литературы, Москва, 1963).

Frank Witt, Measuring Cable Loss - Improving measurement accuracy when low-power analyzers are used. American Radio Relay League, May/June 2005.

Phenolic G10 FR4 datasheet. Available at:

Embedded capacitor material datasheet. Available at:

RT duroid laminates datasheet. Available at:

High frequency laminates datasheet. Available at:

S. Galla and A. Konczakowska, "Application of Infrared Thermography to Non-Contact Testing of AC/AD Power Supply", FU Elec. Energ., vol. 28, no. 2, pp. 151-158, 2015.

G. Breglio, A. Irace, L. Maresca, M. Riccio, G. Romano and P. Spirito, "Infrared Thermography Applied to Power Electron Devices Investigation", FU Elec. Energ., vol. 28, no. 2, pp. 205-212, 2015.


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ISSN: 0353-3670 (Print)

ISSN: 2217-5997 (Online)

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