Reradiation antenna and wireless charger

• US 9,997,836 B2
• Filed: 02/13/2015
• Issued: 06/12/2018
• Est. Priority Date: 04/02/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kwon, Jaesoon, Seo, Jeongkyo, Hwang, Joosung
• Primary Examiner(s): Dinh, Trinh
• Application Number:
  US14/621,772
• Publication Number:
  US 20150288067A1
• Time in Patent Office: 1,215 Days
• Field of Search: None
• 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 connected with a second end of the power feeding unit positioned at an opened end of the slot, and including a plurality of conductive tapes separated from each other,

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,

wherein the first direction is parallel to a longitudinal direction of the power feeding unit,

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

wherein the plurality of conductive tapes comprise at least one or more conductive tapes different from each other in length.

2. The reradiation antenna of claim 1, 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.

3. 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.

4. The reradiation antenna of claim 1, 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.

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

a distribution unit that extends from the power feeding unit,

wherein the plurality of conductive tapes extend from the distribution unit and a width of the distribution unit increases as it approaches the power feeding unit.

6. The reradiation antenna of claim 1, further comprising a wireless charger, wherein the wireless charger comprises a power transmission coil positioned below the insulation panel and configured to wirelessly transmit electric power to an external terminal.

7. The reradiation antenna of claim 6, 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.

8. The reradiation antenna of claim 7, wherein the electromagnetic field shielding pattern is arranged between the power transmission coil and the insulation panel.

9. The reradiation antenna of claim 6, 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.

11. The reradiation antenna of claim 9, wherein the third tape is slantly extended from the second tape while making an obtuse angle.

12. The reradiation antenna of claim 11, 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.

10. 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, connected with a second end of the power feeding unit positioned at an opened end of the slot,

wherein the radiation unit corresponds to a tape shape positioned at outside of the insulation panel, such that a center part of the insulation panel is empty,

wherein the power feeding unit has a meander shape,

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 unit,

wherein the first radiation unit extends in a shape of ‘

’

,

wherein the first radiation unit comprises a first tape horizontally extending from the second end of the power feeding unit, a second tape vertically extending by being bent from an end of the first tape, and a third tape extending from the second tape,

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 the first tape from the second end of the power feeding unit and a sixth tape vertically extending by being bent from an end of the fifth tape.

13. The reradiation antenna of claim 10, 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.