Wireless communication antenna including magnetic body
A wireless communication antenna includes: a magnetic body including a plurality of bar-shaped unit ribbons arranged in columns, wherein the unit ribbons have shape anisotropy and a radiation direction on a side of the wireless communication antenna; and a solenoid coil including conductive patterns disposed around the magnetic body.
1. A wireless communication antenna, comprising:
a magnetic body comprising a magnetic layer, the magnetic layer including a plurality of bar-shaped unit ribbons arranged in columns in a same plane, the plurality of unit ribbons having shape anisotropy and a radiation direction on a side of the wireless communication antenna; and
a solenoid coil comprising conductive patterns disposed around the magnetic body,
wherein the magnetic body further comprises a wall separating the columns.
2. The wireless communication antenna of claim 1 , wherein a length direction of the plurality of unit ribbons is parallel to an axis direction of the solenoid coil.
3. The wireless communication antenna of claim 1 , wherein the plurality of unit ribbons are further arranged in stacked magnetic layers.
4. A wireless communication antenna, comprising:
a magnetic body comprising a plurality of bar-shaped unit ribbons arranged in columns, the unit ribbons having shape anisotropy and a radiation direction on a side of the wireless communication antenna; and
a solenoid coil comprising conductive patterns disposed around the magnetic body,
wherein the plurality of unit ribbons is further arranged in stacked magnetic layers, and
wherein the plurality of unit ribbons are arranged such that a first boundary between unit ribbons, among the plurality of unit ribbons, of one magnetic layer, among the stacked magnetic layers, does not overlap a second boundary between unit ribbons, among the plurality of unit ribbons, of another magnetic layer, among the stacked magnetic layers, the another magnetic layer being adjacent to the one magnetic layer.
5. The wireless communication antenna of claim 1 , wherein the wall comprises a continuous film surrounding a side surface of each of the columns and one of a top surface and a bottom surface of each of the columns.
6. The wireless communication antenna of claim 5 , wherein the wall comprises a material having magnetic properties.
7. The wireless communication antenna of claim 1 , wherein the plurality of unit ribbons comprise one of a nanocrystal alloy, an amorphous crystal alloy, or permalloy.
8. The wireless communication antenna of claim 1 , wherein each unit ribbon among the plurality of unit ribbons comprises a thickness of 10 μm to 200 μm.
9. The wireless communication antenna of claim 1 , wherein each unit ribbon among the plurality of unit ribbons comprises a width of 40 mm or less.
10. The wireless communication antenna of claim 1 , wherein the magnetic body comprises a shape that is outwardly convex in an axis direction of the solenoid coil.
11. The wireless communication antenna of claim 1 , further comprising;
a resin layer disposed around the magnetic body.