Integrated dual-band antenna for laptop applications

• US 20030222823A1
• Filed: 02/20/2003
• Published: 12/04/2003
• Est. Priority Date: 05/29/2001
• Status: Active Grant

• Current Assignee: Lenovo PC International Limited (Lenovo Group Ltd.)
• Original Assignee: International Business Machines Corporation
• Inventors: Gaucher, Brian P., Liu, Duixian, Flint, Ephraim B.
• Granted Patent: US 8,294,620 B2
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/2266 disposed inside the computer
• CPC Class Codes: H01Q 1/2275 associated to expansion card or bus, e.g. in PCMCIA, PC cards, Wireless USB
• CPC Class Codes: H01Q 1/44 using equipment having another main function to serve additionally as an antenna , e.g. means for giving an antenna an aesthetic aspectH01Q1/27 - H01Q1/34 take precedence
• CPC Class Codes: H01Q 5/378 Combination of fed elements with parasitic elements
• 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: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

Dual-band antennas that are embedded within portable devices such as laptop computers. In one aspect, a dual-band antenna for a portable device (e.g., laptop computer) includes a first element having a resonant frequency in a first frequency band and a second element having a resonant frequency in a second frequency band, wherein the first element is connected to a signal feed, wherein the second element is grounded, and wherein the first and second elements are integrated within a portable device.

Claims

1. An dual-band antenna for a portable device, comprising:

a first element having a resonant frequency in a first frequency band; and

a second element having a resonant frequency in a second frequency band, wherein the first element is connected to a signal feed, wherein the second element is grounded, and wherein the dual-band antenna is integrated within a portable device.

2. The antenna of claim 1, wherein the first frequency band is about 2.4 GHz to about 2.5 GHz, and wherein the second frequency band is about 5.15 GHz to about 5.35 GHz.

3. The antenna of claim 1, wherein the first element is connected to ground.

4. The antenna of claim 1, wherein the portable device comprises a laptop 15 computer comprising a display unit having a metal support frame, and wherein the antenna is connected to the metal support frame of the display unit for grounding the antenna.

5. The antenna of claim 4, wherein the first and second elements are connected to the metal support frame.

6. The antenna of claim 1, wherein the first element comprises an inverted-F antenna element and the second element comprises an inverted-L antenna element.

7. The antenna of claim 1, wherein the first element comprises an inverted-F antenna element and the second element comprises a slot antenna element.

8. The antenna of claim 1, wherein the first element comprises a slot antenna element and the second element comprises a slot antenna element.

9. The antenna of claim 1, wherein the first element comprises a slot antenna element and the second element comprises an inverted-L antenna element.

10. The antenna of claim 1, wherein the signal feed comprises a coaxial transmission line having a center conductor connected to the first element.

11. The antenna of claim 1, wherein the first and second elements comprise metal strips formed on a PCB (printed circuit board) substrate.

12. The antenna of claim 11, wherein the portable device comprises a portable computer comprising a display unit with a metal support frame, and wherein the PCB is mounted to the metal support frame of the display unit.

13. The antenna of claim 12, wherein a plane of the antenna is disposed substantially parallel to a plane of the metal support frame.

14. The antenna of claim 12, wherein a plane of the antenna is disposed substantially perpendicular to a plane of the metal support frame.

15. The antenna of claim 1, wherein the portable device comprises a portable computer comprising a display unit with a metallic cover, and wherein the first and second elements are integrally formed with the metallic cover.

16. The antenna of claim 1, wherein the portable device comprises a portable computer comprising a display unit having a RF shielding foil, and wherein the first and second elements are integrally formed with the RF shielding foil.