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Single and Multi-Phase Inverters

T11.8 - Design and Experimental Validation of a 27.12 MHz GaN Class-E Inverter with Multi-Resonant Networks

Wednesday, March 25, 2026
11:20 AM - 11:40 AM CT
Location: 214C
The conventional class-E inverter is inherently limited in its frequency scalability due to the parasitic output capacitance of the switching devices, even with the use of GaN FETs. This paper proposes a new circuit topology featuring a resonant structure between the input inductor and the shunt capacitor, forming multiple resonant networks in conjunction with the output resonant tank. The proposed topology preserves the key benefits of the conventional class-E inverter--simplicity and minimal switching losses--while addressing its frequency limitation. A prototype inverter is designed and tested, achieving the class-E Zero-Voltage-Switching / Zero-Derivative-Switching (ZVS/ZDS) operation at an operating frequency of 27.12 MHz. The prototype delivers 68.6 W of output power with a power conversion efficiency of 94.4%.