FREQUENCY SELECTION BOARD

摘要

PROBLEM TO BE SOLVED: To provide a frequency selection board that is enhanced in frequency selection performance under non-contact power transmission to a vehicle.SOLUTION: A folding spiral FSS36 has a rectangular conductor plate 38 and a folding spiral slot 40 provided to the conductor plate 38. The folding spiral slot 40 has a first slot section 42 and a second slot section 46. The first slot section 42 draws a spiral shape extending outwards from the inner end 54 as indicated by an arrow 48 and reaches the outer end 50. The second slot section 46 folds back outwards from the outer end 50 of the first slot section 42, and draws a spiral shape to the inside in juxtaposition with the first slot section as indicated by an arrow 52. As indicated by an arrow 58, the second slot section 46 draws the spiral shape till the position at which the second slot section 46 is in juxtaposition with the inner end 54, and then folds back inwards at that position to be connected to the inner end 54 of the first slot section 42.