RERADIATION ANTENNA AND WIRELESS CHARGER

• US 20150288067A1
• Filed: 02/13/2015
• Published: 10/08/2015
• Est. Priority Date: 04/02/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: SEO, Jeongkyo, KWON, Jaesoon, HWANG, Joosung
• Granted Patent: US 9,997,836 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01Q 1/3291 mounted in or on other locations inside the vehicle or vehicle body
• CPC Class Codes: H01Q 1/52 Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure absorbing means H01Q17/00
• CPC Class Codes: H01Q 21/30 Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
• CPC Class Codes: H01Q 5/364 Creating multiple current paths
• CPC Class Codes: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40
• CPC Class Codes: H01Q 9/40 Element having extended radiating surface
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A reradiation antenna including an insulation panel; a ground contact formed on one side of the insulation panel; a slot formed by eliminating a part of the ground contact by exposing the insulation panel; a power feeding unit formed on the insulation panel between the slot and separated from the ground contact and connected with a power source using a first end of the power feeding unit; and a radiation unit formed on one side of the insulation panel, and connected with a second end of the power feeding unit positioned at an opened end of the slot.

Claims

1. A reradiation antenna, comprising:

an insulation panel;

a ground contact formed on one side of the insulation panel;

a slot formed by eliminating a part of the ground contact by exposing the insulation panel;

a power feeding unit formed on the insulation panel between the slot and separated from the ground contact and connected with a power source using a first end of the power feeding unit; and

a radiation unit formed on one side of the insulation panel, and connected with a second end of the power feeding unit positioned at an opened end of the slot.

2. The reradiation antenna of claim 1, wherein the radiation unit includes a plurality of conductive tapes separated from each other.

3. The reradiation antenna of claim 2, wherein the plurality of conductive tapes extend in a first direction and are arranged in parallel in a second direction perpendicular to the first direction, and

wherein a plurality of slits extend in the first direction between the plurality of conductive tapes.

4. The reradiation antenna of claim 3, wherein the plurality of conductive tapes comprise at least one or more conductive tapes different from each other in length.

5. The reradiation antenna of claim 4, wherein the plurality of conductive tapes form a V shape pointing towards the power feeding unit by including conductive tapes positioned at a center of the radiation unit having a longer length than conductive tapes positioned toward sides of the radiation unit.

6. The reradiation antenna of claim 1, further comprising:

a connector including a first pin connected with the ground contact and a second pin connected with the power feeding unit.

7. The reradiation antenna of claim 2, wherein a maximum length among the plurality of conductive tapes corresponds to ¼

of a wavelength of a shortest frequency of a signal transceived by the reradiation antenna, and

wherein a minimum length among the plurality of conductive tapes corresponds to ¼

of a wavelength of a longest frequency of the signal transceived by the reradiation antenna.

8. The reradiation antenna of claim 1, wherein the radiation unit comprises:

a pair of distribution units separated from each other in two directions from the second end of the power feeding unit,

wherein the plurality of conductive tapes extend from the distribution units and the distribution units become thicker closer to the power feeding unit.

9. The reradiation antenna of claim 1, wherein the radiation unit corresponds to a tape shape positioned at outskirts of the insulation panel.

10. The reradiation antenna of claim 9, wherein the radiation unit comprises:

a first radiation unit extended in a first direction from the power feeding unit and a second radiation unit extended in a direction opposite to the first direction, and

wherein the second radiation unit is different in length from the first radiation.

11. The reradiation antenna of claim 10, wherein the first radiation unit extends in a shape of ‘

’

, and

wherein the first radiation unit comprises a first tape extending to a left or a right from the second end of the power feeding unit, a second tape extending by being bent in a vertical direction from an end of the first tape, and a third tape extending by being bent in a horizontal direction from the second tape.

12. The reradiation antenna of claim 11, wherein the third tape is slantly extended from the second tape while making an obtuse angle.

13. The reradiation antenna of claim 12, wherein the first radiation unit further comprises a fourth tape extending in a direction identical to a direction of the first tape from an end of the third tape.

14. The reradiation antenna of claim 10, wherein the second radiation unit extends in a shape of ‘

’

, and

wherein the second radiation unit comprises a fifth tape extended in a direction opposite to a direction of the first radiation unit from the second end of the power feeding unit and a sixth tape extending by being bent in the vertical direction from the first tape.

15. The reradiation antenna of claim 8, further comprises a third radiation unit formed on another side of the insulation panel corresponding to a position of at least a part of the power feeding unit and a position of at least a part of the ground contact installed in the one side of the insulation panel.

16. The reradiation antenna of claim 1, wherein the power feeding unit has a meander shape.

17. A wireless charger, comprising:

a housing;

a power transmission coil included in an inside of the housing and configured to wirelessly transmit electric power to an external terminal; and

a reradiation antenna formed above the power transmission coil and configured to reradiate an antenna signal,

wherein the reradiation antenna comprises;

an insulation panel;

a ground contact formed on one side of the insulation panel;

a slot formed by eliminating a part of the ground contact by exposing the insulation panel;

a power feeding unit formed on the insulation panel between the slot and separated from the ground contact and connected with a power source using a first end of the power feeding unit; and

a radiation unit formed on one side of the insulation panel, and connected with a second end of the power feeding unit positioned at an opened end of the slot.

18. The wireless charger of claim 17, wherein a vertical direction of the insulation panel is longer than a horizontal direction of the insulation panel, and

wherein the wireless charger further comprises an electromagnetic field shielding pattern formed on another side of the insulation panel and including a plurality of parallel conductive tapes extending in the second direction.

19. The wireless charger of claim 18, wherein the electromagnetic field shielding pattern is arranged between the power transmission coil and the reradiation antenna.

20. The wireless charger of claim 17, wherein the radiation unit comprises a first radiation unit, which is bent in a shape of ‘

’

by being extended to a left or a right from the power feeding unit, a second radiation unit, which is bent in a shape of ‘

’

by being extended in a direction opposite to a direction of the first radiation unit, and

wherein the wireless charger further comprises a capacitive proximity sensor including a plurality of parallel conductive tapes formed between the first radiation unit and the second radiation unit, extending in a horizontal direction on the one side of the insulation panel.