The class Î¦2 resonant converter is one of the most promising very-high-frequency (VHF) power converter topologies. It comprises a class Î¦2 resonant inverter, which provides low switch voltage stress compared to other resonant inverter topologies, and a class E resonant rectifier. In this paper, a design optimization and performance evaluation of the class Î¦2 VHF dc/dc converter are presented. Two different topologies are considered. Due to the complexity of the converter operation, the design is performed in several iterations that is aided by Simplis simulations. The design procedure is illustrated on a 70-W, 160-170-V input and 33-V output voltage class Î¦2 dc/dc converter operating at 30 MHz. A detailed comparison between the two topologies is provided. Finally, the experimental circuit is described in details and measurement results are presented.