Flexible printed circuit board for dual mode antennas, dual mode antenna and user device

• US 10,367,267 B2
• Filed: 04/26/2018
• Issued: 07/30/2019
• Est. Priority Date: 05/31/2012
• Status: Active Grant

• Current Assignee: LS Cable And System Limited (LS Cable)
• Original Assignee: LS Cable And System Limited (LS Cable)
• Inventors: Han, Min Seok, Kim, Young Sun, You, Sung Han, Park, Lae Hyuk, Park, Un Kyu, Lee, Ji Hyung
• Primary Examiner(s): Nguyen, Hoang V
• Application Number:
  US15/963,484
• Publication Number:
  US 20180248265A1
• Time in Patent Office: 460 Days
• CPC Class Codes: H01F 2027/2809 on stacked layers
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/366 made of ferromagnetic material
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01Q 1/2291 used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN] H01Q1/241 takes precedence; WLAN in general H04W
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H01Q 7/06 with core of ferromagnetic material H01Q7/02 takes precedence
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A dual mode antenna including: an insulative sheet including a main surface and an opposite main surface; a loop-shaped wireless communication coil formed on the main surface of the insulative sheet; a wireless power transmission coil formed inside the loop-shaped wireless communication coil to be electrically disconnected from the loop-shaped wireless communication coil, and formed on the main surface of the insulative sheet, a pair of wireless communication coil connection terminals electrically connected to both ends of the loop-shaped wireless communication coil, respectively; a pair of wireless power transmission coil connection terminals electrically connected to both ends of the wireless power transmission coil, respectively; and a ferrite sheet formed to contact the opposite main surface of the insulative sheet.

Claims

1. A dual mode antenna comprising:

an insulative sheet including a main surface and an opposite main surface;

a loop-shaped wireless communication coil formed on the main surface of the insulative sheet;

a wireless power transmission coil formed inside the loop-shaped wireless communication coil to be electrically disconnected from the loop-shaped wireless communication coil, and formed on the main surface of the insulative sheet;

a pair of wireless communication coil connection terminals electrically connected to both ends of the loop-shaped wireless communication coil, respectively;

a pair of wireless power transmission coil connection terminals electrically connected to both ends of the wireless power transmission coil, respectively; and

a ferrite sheet formed to contact the opposite main surface of the insulative sheet,

wherein the ferrite sheet comprises;

a first ferrite sheet formed to be in contact with a position opposite to the loop-shaped wireless communication coil on the insulative sheet; and

a second ferrite sheet formed to be in contact with a position opposite to the wireless power transmission coil on the insulative sheet.

2. The dual mode antenna of claim 1, wherein a distance between the wireless power transmission coil and the loop-shaped wireless communication coil is greater than a distance between element wires forming either each of the wireless power transmission coil or the loop-shaped wireless communication coil.

3. The dual mode antenna of claim 1, wherein one of the pair of wireless communication coil connection terminals is electrically connected to one end of the loop-shaped wireless communication coil via a stitching via, and

wherein the dual mode antenna further comprises a pair of extension patterns configured to electrically connect the pair of wireless power transmission coil connection terminals to the opposite ends of the wireless power transmission coil.

4. The dual mode antenna of claim 3, wherein the pair of extension patterns are arranged not to overlap with the loop-shaped wireless communication coil.

5. The dual mode antenna of claim 4, wherein the pair of extension patterns are formed on a surface of the insulative sheet which is different from the main surface of the insulative sheet on which the loop-shaped wireless communication coil is formed.

6. The dual mode antenna of claim 5, wherein the stitching via comprises:

two vias configured to pass through the insulative sheet; and

a connection pattern configured to electrically connect the two vias to each other.

7. The dual mode antenna of claim 6, wherein the pair of wireless communication coil connection terminals are electrically connected to an external wireless communication module, and

the pair of wireless power transmission coil connection terminals are electrically connected to a wireless power transmission module.

8. The dual mode antenna of claim 1, wherein one of the pair of wireless communication coil connection terminals is electrically connected to one end of the loop-shaped wireless communication coil via a jumper line, and

wherein the dual mode antenna further comprises a pair of extension patterns configured to electrically connect the pair of wireless power transmission coil connection terminals to the opposite ends of the wireless power transmission coil.

9. The dual mode antenna of claim 1, wherein a step adjustment slit is formed between the loop-shaped wireless communication coil and the wireless power transmission coil to adjust a step between the first ferrite sheet and the second ferrite sheet.

10. A user device comprising the dual mode antenna of claim 1.