Patent attributes
A facing portion of an antenna is provided with a first capacitance complementary adjusting portion which adjusts variation of a capacitance caused by a first movement of a second facing portion relative to a first facing portion and a second capacitance complementary adjusting portion which adjust variation of the capacitance caused by a second movement of the second facing portion relative to the first facing portion. The first capacitance complementary adjusting portion has a first variable portion and a second variable portion which have mutually opposite effects on the capacitance. The second capacitance complementary adjusting portion has a third variable portion and a fourth variable portion which have mutually opposite effects on the capacitance.
