A. Jandaliyeva1, T. A. Savinykh2, N. V. Mikhailov3, A. V. Shchelokova4
1–4 ITMO University (St. Petersburg, Russia)

1 a.jandaliyeva@itmo.ru

Wireless power transfer (WPT) is a promising technology for diverse applications ranging from portable electronics and electric vehicles to medical implants and smart home sensors. Recently, volumetric systems have gained significant attention due to their ability to charge devices regardless of their position and orientation within the space. This work presents a comparative analysis of various volumetric resonator topologies and excitation schemes using numerical electromagnetic modeling.

A strong coupling parameter and its decomposition into magnetic coupling and ohmic loss contributions have been proposed to enable sensitive, physically grounded comparison of configurations where standard metrics (power transfer efficiency, magnetic field uniformity) show only minor differences. Results demonstrate that the most effective configuration employs copper strips with direct cable excitation, achieving the highest efficiency (83,7%) and strong coupling parameter (g = 126,01). Key optimization parameters have been identified as current phase synchronicity across conductive elements to maximize magnetic coupling and minimization of ohmic losses through optimized current distribution.

The findings provide practical guidelines for designing efficient volumetric WPT systems for portable devices, medical implants, and smart home sensors.

Jandaliyeva A., Savinykh T.A., Mikhailov N.V., Shchelokova A.V. Impact of volumetric resonator topology and excitation scheme on the strong coupling parameter in wireless power transfer systems. Antennas. 2026. № 2. P. 28–37. DOI: https://doi.org/10.18127/ j03209601-202602-03 (in Russian)

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