Antenna apparatus and portable wireless device using the same

• US 20060181468A1
• Filed: 02/14/2006
• Published: 08/17/2006
• Est. Priority Date: 02/17/2005
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Satoh, Yuki, Iguchi, Akihiko
• Granted Patent: US 7,417,591 B2
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/521 reducing the coupling between adjacent antennas
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 9/40 Element having extended radiating surface

Abstract

An antenna apparatus and a portable wireless device using the same are disclosed, in which a coupling between antenna elements is reduced and an isolation property is improved even when frequencies of antenna elements are close or overlapped. The antenna apparatus includes a ground board, a first antenna element corresponding to a first frequency band, a second antenna element corresponding to a second frequency band in the vicinity of, or overlapped with the first frequency band, a first power feeding part connecting the ground board to the first antenna element and a second power feeding part connecting the ground board to the second antenna element, in which the first antenna element is arranged in a direction at an angle of an integer multiple of 90 degrees with respect to a long edge of the ground board, and the second antenna element is arranged in parallel with the long edge of the ground board.

Claims

1. An antenna apparatus, comprising:

a ground board;

a first antenna element corresponding to a first frequency band;

a second antenna element corresponding to a second frequency band in the vicinity of, or overlapped with the first frequency band;

a first power feeding part connecting the ground board to the first antenna element; and

a second power feeding part connecting the ground board to the second antenna element, and

wherein the first antenna element is arranged in a direction at an angle of an integer multiple of 90 degrees with respect to a long edge of the ground board, and the second antenna element is arranged in parallel with the long edge of the ground board.

2. The antenna apparatus of claim 1,

wherein the integer multiple of 90 degrees is made to be an integer multiple of 180 degrees.

3. The antenna apparatus of claim 2,

wherein the length of a short edge of the ground board is made to be the length of approximately ¼

wavelength of the first frequency band or the second frequency band.

4. The antenna apparatus of claim 2,

wherein the length of a short edge of the ground board is made to be longer than ¼

wavelength of the first frequency band or the second frequency band, and a slit is provided at a position of approximately ¼

wavelength of the first frequency band or the second frequency band in the short edge of the ground board.

5. The antenna apparatus of claim 4, wherein the length of the slit is made to be approximately ¼

wavelength of the first frequency band or the second frequency band.

6. The antenna apparatus of claim 2,

wherein the length of a short edge of the ground board is made to be longer than ¼

wavelength of the first frequency band or the second frequency band, and a cut-out portion is provided in a slantwise direction from a position of approximately ¼

wavelength of the first frequency band or the second frequency band in the short edge of the ground board.

7. The antenna apparatus of claim 2,

wherein the length of a short edge of the ground board is made to be longer than ¼

wavelength of the first frequency band or the second frequency band, and a cut-out portion having a step-shape is provided from a position of approximately ¼

wavelength of the first frequency band or the second frequency band in the short edge of the ground board.

8. The antenna apparatus of claim 1,

wherein the integer multiple of 90 degrees is made to be 90 degrees an integer multiple of 180 degrees.

9. The antenna apparatus of claim 1,

wherein another ground board is electrically connected to the ground board through a connecting part which is flexible, and the ground board and the another ground board have an openable/closable structure.

10. The antenna apparatus of claim 1,

wherein the first frequency band is specific to Bluetooth, and the second frequency band complies with Wireless Local Area Network.

11. The antenna apparatus claim 1, wherein said antenna apparatus is included in a portable wireless device.

12. The antenna apparatus of claim 2, wherein said antenna apparatus is included in a portable wireless device.

13. The antenna apparatus of claim 3, wherein said antenna apparatus is included in a portable wireless device.

14. The antenna apparatus of claim 4, wherein said antenna apparatus is included in a portable wireless device.

15. The antenna apparatus of claim 5, wherein said antenna apparatus is included in a portable wireless device.

16. The antenna apparatus of claim 6, wherein said antenna apparatus is included in a portable wireless device.

17. The antenna apparatus of claim 7, wherein said antenna apparatus is included in a portable wireless device.

18. The antenna apparatus of claim 8, wherein said antenna apparatus is included in a portable wireless device.

19. The antenna apparatus of claim 9, wherein said antenna apparatus is included in a portable wireless device.

20. The antenna apparatus of claim 10, wherein said antenna apparatus is included in a portable wireless device.