Multi-frequency antenna suitably working in different wireless networks

• US 20090153430A1
• Filed: 02/17/2009
• Published: 06/18/2009
• Est. Priority Date: 05/23/2005
• Status: Active Grant

• Current Assignee: Chen-Ta Hung, Hsien-Sheng Tseng, Lung-Sheng Tai, Shu-Yean Wang
• Original Assignee: Chen-Ta Hung, Hsien-Sheng Tseng, Lung-Sheng Tai, Shu-Yean Wang
• Inventors: Tai, Lung-Sheng, Hung, Chen-Ta, Tseng, Hsien-Sheng, Wang, Shu-Yean
• Granted Patent: US 7,924,230 B2
• Time in Patent Office: Days
• US Class Current: 343/846
• CPC Class Codes: H01Q 5/371 Branching current paths
• CPC Class Codes: H01Q 5/40 Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

A multi-frequency antenna includes a first antenna (1) and a second antenna (2) both operating at wireless wide area network, a third antenna (3) and a fourth antenna (4) both operating at wireless local area network. The first antenna, the second antenna, the third antenna and the fourth antenna are integrally made from a metal sheet and have a common grounding portion (50). The first and the second antennas have a first connecting portion (12) on which a feeding point (120) is located, and the third and the fourth antenna have a second connecting portion (34) on which another feeding point (340) is located.

Claims

1. A multi-frequency antenna for being assembled in an electrical device, comprising:

a grounding element;

a first connecting portion and a second connecting portion;

a first radiating portion extending from the first connecting portion and working on a first frequency band;

a second radiating portion extending from the first connecting portion and working on a second frequency band;

a third radiating portion extending from the second connecting portion and working on a third frequency band; and

a fourth radiating portion extending form the second connecting portion and working on a fourth frequency band;

said grounding element, the first and second connecting, the first, second, third, and fourth radiating portion being integrated to be assembled in the electrical device.

2. The multi-frequency antenna as claimed in claim 1, further comprising a first and second installing portion respectively extending from the two ends of the grounding element.

3. The multi-frequency antenna as claimed in claim 1, wherein both said first connecting portion and second connecting portion extend from the grounding element.

4. The multi-frequency antenna as claimed in claim 1, wherein the first radiating portion and the second radiating portion respectively extends along a first direction and a second direction, the third radiating portion and the fourth radiating portion respectively extends along the second direction and the first direction, the third radiating portion and the fourth radiating portion are between the first radiating portion and the grounding element.

5. The multi-frequency antenna as claimed in claim 1, further comprises a coupling radiating portion located between the fourth radiating portion and the grounding element, said coupling radiating portion works at a fifth frequency band.

6. The multi-frequency antenna as claimed in claim 5, wherein the coupling radiating portion extends from the second connecting portion, and the coupling radiating portion, the second connecting portion, the first and second radiating portion form an inverted H shape.

7. The multi-frequency antenna as claimed in claim 1, further comprises a lengthwise portion extending from the grounding element, the first and second connecting portions respectively extends from the lengthwise portion along the second and first directions.

8. The multi-frequency antenna as claimed in claim 1, wherein the first radiating portion and the second radiating portion works in the wireless wide are net, and the third radiating portion and the fourth radiating portion works in the wireless local are net.

9. The multi-frequency antenna as claimed in claim 1, further comprises a first coaxial cable feeding to form a feeding line of the first antenna and a second coaxial cable to form a feeding line of the second antenna.

10. The multi-frequency antenna as claimed in claim 9, wherein said first coaxial cable comprises an inner conductor connected to the first connecting portions and an outer conductor connected to the grounding element, second connecting portion, said second coaxial cable respectively comprising an inner conductor connected to the first connecting portions and an outer conductor connected to the grounding element, second connecting portion.

11. A multi-frequency antenna for being used in an electrical devices, comprising:

a first grounding position and a second grounding position spaced from each other;

a first connecting portion extending from the first grounding position;

a second connecting portion extending from the second grounding position;

a first radiating portion and a second radiating portion respectively extending from the first connecting portion; and

a third radiating portion and a fourth radiating portion respectively extending from the second connecting portion;

said four radiating portions respectively working at four different frequency bands.

12. The multi-frequency antenna as claimed in claim 11, wherein said first grounding position and said second position are located on a same grounding element.

13. The multi-frequency antenna as claimed in claim 12, further comprising first and second installing portions extend from two opposite ends of the grounding element, respectively.

14. The multi-frequency antenna as claimed in claim 11, wherein the first radiating portion and the second radiating portion respectively extends along a first direction and a second direction, said third radiating portion and the fourth radiating portion respectively extends along the second direction and the first direction.

15. The multi-frequency antenna as claimed in claim 11, further comprises a coupling radiating portion located between the fourth radiating portion and the grounding element, said coupling radiating portion works at a fifth frequency band.

16. The multi-frequency antenna as claimed in claim 11, wherein said first connecting portion is separated from the second grounding position so as to form a slot therebetween.

17. A multi-frequency antenna comprising for being assembled in an electrical device, comprising:

a first connecting portion including at least a first downward lying L-shaped configuration having a first vertical section and a first horizontal section;

a second connecting portion including at least second downward lying L-shaped configuration having a second vertical section and a second horizontal section;

a first radiating portion extending from the first connecting portion and working on a first frequency band;

a second radiating portion extending from the first connecting portion and working on a second frequency band;

a third radiating portion extending from the second connecting portion and working on a third frequency band; and

a fourth radiating portion extending form the second connecting portion and working on a fourth frequency band;

wherein

said first vertical section and said second vertical section are directly grounded under condition that the second connection portion and the associated third radiating portion and fourth radiation portion are located in a space essentially defined vertically under the first radiating portion and laterally beside the first connection portion.

18. The multi-frequency antenna as claimed in claim 17, wherein the first vertical section and the second vertical section is positioned closer to each other while the first horizontal section and second horizontal section extending oppositely away from each other from the corresponding first vertical section and second vertical section, respectively.

19. The multi-frequency antenna as claimed in claim 17, wherein said first vertical section and said second vertical section are commonly grounded to a same grounding element.

20. The multi-frequency antenna as claimed in claim 17, wherein the second radiating portion is essentially horizontally aligned with the first horizontal section.