| （英） |
Reducing vehicle weight is one of the key factors for improvement in fuel efficiency. Therefore, wireless power transfer in the engine compartment has been studied. However, conventional approaches still have not achieved practicable efficiency because the engine compartment is a shielded space with signal scatterers. In this paper, a new approach based on the waveguide mode is proposed. The engine compartment is considered to have a similar effect on a ridge waveguide. First, we evaluate the variation in the resonant frequency to confirm that the engine compartment behaves as a ridge waveguide. Next, the power transmission characteristics in the shielded space, simulating the engine compartment at the 69.8 MHz which is a resonant frequency of dominant mode in ridge waveguide, is evaluated. As to the results, the measured results are in good agreement with the simulated one. These results indicate possibility that the wireless power transmission efficiency can be improved by using the waveguide mode. |