Antenna device and wireless communication terminal

摘要

An antenna device includes an antenna coil member and an extension member. The antenna coil member includes a first base, and a spiral conductor is on a front surface of the first base. An inner-peripheral-end conductor is connected to an inner peripheral end of the spiral conductor, and an outer-peripheral-end conductor is connected to an outer peripheral end. The extension member includes a second base, and first and second extension conductor patterns are located on a front surface of the second base. First and second end-portion conductors are respectively connected to ends of the first and second extension conductor patterns. The extension member is arranged at a front surface side of the antenna coil member, the inner-peripheral-end conductor faces the first end-portion conductor, and the outer-peripheral-end conductor faces the second end-portion conductor.

主权项

1. An antenna device, comprising:
an antenna coil member including an insulating first base, an antenna coil including a spiral-shaped conductor pattern on a front surface of the first base, an inner-peripheral-end conductor on the front surface of the first base and connected to an inner peripheral end of the spiral-shaped conductor pattern, and an outer-peripheral-end conductor on the front surface of the first base and connected to an outer peripheral end of the spiral-shaped conductor pattern; and an extension member including an insulating second base, first and second extension conductor patterns on a front surface of the second base, a first end-portion conductor on the front surface of the second base and connected to one end of the first extension conductor pattern, and a second end-portion conductor on the front surface of the second base and connected to one end of the second extension conductor pattern; wherein the antenna coil member and the extension member are arranged so that the inner-peripheral-end conductor faces the first end-portion conductor, the outer-peripheral-end conductor faces the second end-portion conductor, the other end of the first extension conductor pattern or the other end of the second extension conductor pattern does not overlap the spiral-shaped conductor pattern, and the other ends of the first and second extension conductor patterns are arranged inside or outside the spiral-shaped conductor pattern.