Wireless communications antenna and wireless communications device using the same
A wireless communications antenna includes a first coil including first conductive patterns disposed on a first layer along a first axis and a second coil including second conductive patterns disposed on a second layer along a second axis having a direction different from a direction of the first axis.
1. A wireless communications antenna, comprising:
a first coil comprising first conductive patterns disposed on a first layer along a first axis;
a second coil comprising second conductive patterns disposed on a second layer along a second axis having a direction different from a direction of the first axis; and
a magnetic material layer comprising a magnetic material,
wherein the first layer is disposed on the magnetic material layer; and
wherein the first coil further comprises:
third conductive patterns disposed on a third layer disposed below the magnetic material layer along the first axis; and
first via electrodes electrically connecting the first conductive patterns to the third conductive patterns.
2. The wireless communications antenna of claim 1 , wherein:
the second layer is disposed under the magnetic material layer; and
the second coil further comprises:
fourth conductive patterns disposed on a fourth layer disposed on the magnetic material layer along the second axis; and
second via electrodes electrically connecting the second conductive patterns to the fourth conductive patterns.
3. The wireless communications antenna of claim 1 , wherein the first coil is a solenoid coil using the magnetic material layer as a core.
4. The wireless communications antenna of claim 2 , wherein the second coil is a solenoid coil using the magnetic material layer as a core.
5. The wireless communications antenna of claim 2 , wherein the first axis is perpendicular to the second axis.
6. The wireless communications antenna of claim 2 , wherein:
the first conductive patterns are disposed on an upper surface of a first substrate layer;
the fourth conductive patterns are disposed on a lower surface of the first substrate layer;
the second conductive patterns are disposed on an upper surface of a second substrate layer, the second substrate layer being disposed below the first substrate layer;
third conductive patterns are disposed on a lower surface of the second substrate layer; and
the magnetic material layer is disposed between the first substrate layer and the second substrate layer and comprises the magnetic material.
7. The wireless communications antenna of claim 2 , wherein:
the first conductive patterns are disposed on an upper surface of a first substrate layer;
the fourth conductive patterns are disposed on a lower surface of the first substrate layer;
the third conductive patterns are disposed on an upper surface of a second substrate layer, the second substrate layer being disposed below the first substrate layer;
the second conductive patterns are disposed on a lower surface of the second substrate laver; and
the magnetic material layer is disposed between the first substrate layer and the second substrate layer and comprises the magnetic material.
8. A wireless communications device, comprising:
a wireless communications antenna comprising a first coil comprising first conductive patterns disposed on a first layer along a first axis and a second coil comprising second conductive patterns disposed on a second layer and formed along a second axis different from the first axis;
a wireless communications controller configured to control the wireless communications antenna to allow the wireless communications antenna to wirelessly transmit information by transmitting an information signal to the wireless communications antenna; and
a magnetic material layer comprising a magnetic material,
wherein the first layer is disposed on the magnetic material layer; and
wherein the first coil further comprises:
third conductive patterns disposed on a third layer disposed below the magnetic material layer along the first axis; and
first via electrodes electrically connecting the first conductive patterns to the third conductive patterns.
9. The wireless communications device of claim 8 , wherein a communications area configured to be formed by the first coil is different from a communications area configured to be formed by the second coil.
10. The wireless communications device of claim 8 , wherein:
the second layer is disposed under the magnetic material layer; and
the second coil further comprises:
fourth conductive patterns disposed on a fourth layer disposed on the magnetic material layer along the second axis; and
second via electrodes electrically connecting the second conductive patterns to the fourth conductive patterns.
11. The wireless communications device of claim 10 , wherein:
the first conductive patterns are disposed on an upper surface of a first substrate layer;
the fourth conductive patterns are disposed on a lower surface of the first substrate layer;
the second conductive patterns are disposed on an upper surface of a second substrate layer, the second substrate layer being disposed below the first substrate layer;
the third conductive patterns are disposed on a lower surface of the second substrate layer; and
the magnetic material layer is disposed between the first substrate layer and the second substrate layer and comprises the magnetic material.
12. The wireless communications device of claim 10 , wherein:
the first conductive patterns are disposed on an upper surface of a first substrate layer;
the fourth conductive patterns are disposed on a lower surface of the first substrate layer;
the third conductive patterns are disposed on an upper surface of a second substrate layer, the second substrate layer being disposed below the first substrate layer;
the second conductive patterns are disposed on a lower surface of the second substrate layer; and
the magnetic material layer is disposed between the first substrate layer and the second substrate layer and comprises the magnetic material.