ANTENNA UNIT AND PLANAR WIRELESS DEVICE

• US 20130342419A1
• Filed: 08/27/2013
• Published: 12/26/2013
• Est. Priority Date: 03/02/2011
• Status: Active Grant

• Current Assignee: Fujikura Limited
• Original Assignee: Fujikura Limited
• Inventors: Takigahira, Masato, Hayashi, Hiroyuki
• Granted Patent: US 9,225,059 B2
• Time in Patent Office: Days
• US Class Current: 343/848
• CPC Class Codes: H01M 10/0436 Small-sized flat cells or batteries for portable equipment
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 6/40 Printed batteries , e.g. thin film batteries
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/48 Earthing means; Earth screens; Counterpoises
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

An object of the present invention is to provide a planar type antenna unit and a planar type wireless device capable of reducing a projecting area of the wireless device. To achieve the above object, the planar type wireless device of the present invention is provided with a grounded planar antenna 10 which includes a radiating element 11 and a ground plate 12, a thin-film battery 20 which includes a positive-electrode current collector 21 opposing a negative-electrode current collector which is formed by the ground plate 12, and a transmitter/receiver IC arranged at a power feeding point 13 of the grounded planar antenna 10 and including a transmitter-receiver circuit which receives power from the negative-electrode current collector of the thin-film battery 20 and the positive-electrode current collector 21 of the thin-film battery 20, and transmits and receives signals by operating the radiating element 11 of the grounded planar antenna 10.

Claims

1. An antenna unit, comprising:

a grounded planar antenna including a radiating element and a ground plate; and

a thin-film battery including a positive-electrode current collector opposing a negative-electrode current collector which is formed by the ground plate.

2. The antenna unit according to claim 1, wherein a mirror image of the radiating element is arranged within a plane of the ground plate.

3. The antenna unit according to claim 1, wherein a projecting area of the positive-electrode current collector is smaller than a projecting area of the negative-electrode current collector.

4. The antenna unit according to claim 1, wherein the positive-electrode current collector has a mesh structure.

5. The antenna unit according to claim 1, wherein the positive-electrode current collector is arranged at a position not overlapping with a mirror image of the radiating element.

6. A planar type wireless device, comprising:

the antenna unit according to claim 1; and

a circuit which receives power from the negative-electrode current collector of the thin-film battery and the positive-electrode current collector of the thin-film battery, and at least transmits or receives signals by operating the radiating element of the grounded planar antenna,

wherein the circuit is arranged at a power feeding point of the grounded planer antenna.

7. A planar type wireless device, comprising:

the antenna unit according to claim 2; and

a circuit which receives power from the negative-electrode current collector of the thin-film battery and the positive-electrode current collector of the thin-film battery, and at least transmits or receives signals by operating the radiating element of the grounded planar antenna,

wherein the circuit is arranged at a power feeding point of the grounded planer antenna.

8. A planar type wireless device, comprising:

the antenna unit according to claim 3; and

a circuit which receives power from the negative-electrode current collector of the thin-film battery and the positive-electrode current collector of the thin-film battery, and at least transmits or receives signals by operating the radiating element of the grounded planar antenna,

wherein the circuit is arranged at a power feeding point of the grounded planer antenna.

9. A planar type wireless device, comprising:

the antenna unit according to claim 4; and

a circuit which receives power from the negative-electrode current collector of the thin-film battery and the positive-electrode current collector of the thin-film battery, and at least transmits or receives signals by operating the radiating element of the grounded planar antenna,

wherein the circuit is arranged at a power feeding point of the grounded planer antenna.

10. A planar type wireless device, comprising:

the antenna unit according to claim 5; and

a circuit which receives power from the negative-electrode current collector of the thin-film battery and the positive-electrode current collector of the thin-film battery, and at least transmits or receives signals by operating the radiating element of the grounded planar antenna,

wherein the circuit is arranged at a power feeding point of the grounded planer antenna.