Chip antenna
A chip antenna includes a coil; and a core including a body portion around which the coil is wound and supporting portions disposed on both sides of the body portion, wherein the core includes a second groove formed in the supporting portions and accommodating an end portion of the coil.
1. A chip antenna comprising:
a coil;
a core including a body portion around which the coil is wound and supporting portions, each on one of opposite ends of the body portion,
the core including a first groove in each supporting portion, the first groove being configured to receive an end of the coil; and
a second groove in each supporting portion and adjacent the first groove,
wherein a thickness of the supporting portions in the first groove is less than a thickness of the supporting portions in the second groove,
wherein the second groove has a depth shallower than a diameter of the coil, and
wherein a leading portion of the coil is flattened to be entirely inserted into the second groove.
2. The chip antenna of claim 1 ,
wherein the first groove is at an outer distal end of the core.
3. The chip antenna of claim 2 , further comprising:
a pad including at least a portion along a bottom surface of the second groove, and electrically connected to the coil.
4. The chip antenna of claim 3 , wherein the leading portion is in the second groove and bonded to the pad.
5. The chip antenna of claim 1 , further comprising:
a pad on a bottom surface of the supporting portions and electrically connected to the coil.
6. The chip antenna of claim 5 , wherein
the pad has an area smaller than an area of a bottom surface of a corresponding one of the supporting portions, and
the first groove is in a boundary region between the pad and the supporting portions.
7. The chip antenna of claim 1 , wherein
the body portion has a substantially rectangular cross-sectional shape, and
at least one chamfered edge is defined between the opposite ends of the core and along edges of the body portion.
8. The chip antenna of claim 2 , wherein the first groove is deeper than the second groove.
9. The chip antenna of claim 1 , further comprising:
a guide block on the core and configured to fix a winding position of the coil.
10. The chip antenna of claim 2 , further comprising:
a third groove defined by a partially removed bottom surface of the first groove.
11. The chip antenna of claim 10 , wherein a width of the third groove in a width direction of the core is greater than a width of the coil.
12. The chip antenna of claim 10 , wherein one surface of the third groove in contact with a bottom surface of the first groove is an inclined surface or a curved surface.
13. The chip antenna of claim 10 , wherein a width of the third groove according to a length direction of the core is in a range of ⅓ or more to ½ or less of a maximum width of the second groove.
14. A chip antenna comprising:
a core including a body portion around which the coil is wound and supporting portions on opposite ends of the body portion,
the core including a first groove defined on a bottom surface of each supporting portion,
a leading portion of the coil is received in the supporting portions through the first groove; and
a second groove in a bottom surface of a corresponding one of the supporting portions,
wherein a thickness of the supporting portions in the first groove is less than the thickness of the supporting portions in the second groove,
wherein the second groove has a depth shallower than a diameter of the coil, and
wherein the leading portion is flattened to be entirely inserted into the second groove.
15. The chip antenna of claim 14 , wherein
the leading portion is received via the first groove which is in the second groove.