Patent ID: 7755558
Filing Date: 2010-07-13
Classification: H01F,H01Q

Abstract:
1. An antenna coil, comprising: a ferrite base shaped in an approximately right-angled parallelepiped configuration including eight corners; a tab provided on each of the eight corners of the ferrite base with four pairs of the tabs, the tabs of each pair opposing each other and being a matching pair; a first groove formed in a surface of the ferrite base parallel to a Y-axis and a first side portion of the tabs; a second groove formed in the surface of the ferrite base parallel to an X-axis and a second side portion of the tabs; a third groove formed in a valley between the opposing tabs of each of the four matching pairs; a first coil wound in the second groove; a second coil wound in the first groove and over the first coil; and a third coil wound in the third groove along a side portion of the ferrite base, wherein the second groove is deeper than the first groove and the third groove; wherein an axis about which the second coil is wound and an axis about which the third coil is wound cross are at right-angles with an axis about which the first coil is wound, and wherein a first end component of each of the first, second, and third coils is connected to a common terminal and a second end component of each of the first, second, and third coils is each connected to a different terminal, thereby providing four terminals.