Multi-band antenna

• US 7,176,838 B1
• Filed: 08/22/2005
• Issued: 02/13/2007
• Est. Priority Date: 08/22/2005
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Kinezos, Christos L.
• Primary Examiner(s): LE, HOANGANH T
• Application Number:
  US11/208,673
• Publication Number:
  US 20070040747A1
• Time in Patent Office: 540 Days
• Field of Search: 343/700.MS, 343/702, 343/729, 343/767, 343/741, 343/866, 343/725
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• 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 13/085 Slot-line radiating ends
• CPC Class Codes: H01Q 5/371 Branching current paths
• 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 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence

Abstract

A multi-band antenna (10) includes one or more a loop portions (12) substantially defining operation in frequency ranges covering between approximately 800 MegaHertz and approximately 1.0 GigaHertz and between approximately 1.8 GigaHertz and approximately 2.0 GigaHertz, a surface plate portion (14) having a length (15) substantially defining operation in a frequency range between approximately 1.7 GigaHertz and approximately 1.9 GigaHertz, and a slot (16) within the surface plate portion having a length (17) substantially defining operation in a frequency range between 5 and 6 Gigahertz (WLAN). The antenna can further include a resonant stub (18) having a length (19) substantially defining operation in a frequency range of approximately 2.4 Gigahertz. The antenna can be a unitary radiating element having a feed element (9) and a ground port (7). Operationally, the antenna can function in 6 bands and can be independently tunable in a majority of the 6 bands.

Claims

1. An antenna, comprising:

a unitary radiating element further comprising;

a loop portion substantially defining operation in frequency ranges between approximately 800 MegaHertz and approximately 1 GigaHertz and between approximately 1.8 GigaHertz and approximately 2.0 GigaHertz;

a surface plate portion having a length substantially defining operation in a frequency range between approximately 1.7 GigaHertz and approximately 1.9 GigaHertz; and

a slot within the surface plate portion having a length substantially defining operation in a frequency range between approximately 5 and 6 Gigahertz.

2. The antenna of claim 1, wherein the unitary radiating element further comprises a resonant stub substantially defining operation in a frequency range of approximately 2.4 Gigahertz.

3. The antenna of claim 1, wherein the unitary radiating element further comprises a feed element.

4. The antenna of claim 1, wherein the unitary radiating element further comprises a ground port.

5. The antenna of claim 1, wherein the antenna comprises sheet metal.

6. The antenna of claim 1, wherein the antenna operates in 6 bands and is independently tunable in a majority of the 6 bands.

7. The antenna of claim 1, wherein the loop portion defines the frequency operation in all GSM bands.

8. The antenna of claim 2, wherein the antenna is a quad-band GSM antenna and a dual-band WLAN antenna.

9. The antenna of claim 1, wherein the antenna has sufficient bandwidth to operate in all international 5 Gigahertz bands.

10. A multi-band antenna, comprising:

a single radiating element having;

a first portion in the form of a loop substantially tunable in frequency ranges covering between approximately 800 MegaHertz and approximately 1 GigaHertz and between approximately 1.8 GigaHertz and approximately 2.0 GigaHertz;

a second portion contiguous with the first portion and in the form of a surface plate substantially tunable in frequency ranges between approximately 1.7 GigaHertz and approximately 1.9 GigaHertz; and

a slot in the second portion tunable for a first WLAN band.

11. The multi-band antenna of claim 10, wherein the single radiating element further comprises a third portion contiguous with the first portion and in the form of a tuning stub for tuning a second WLAN band.

12. The multi-band antenna of claim 10, wherein the multi-band antenna operates with spherical efficiency in the 850, 900, 1800, and 1900 megahertz GSM band ranges, the 2.4 Gigahertz band range, and the 5 Gigahertz band range.

13. The multi-band antenna of claim 10, wherein the multi-band antenna provides sufficient bandwidth to cover all international 5 Gigahertz bandwidths.

14. A wireless communication device, comprising:

an antenna, comprising;

a unitary radiating element further comprising;

a loop portion substantially defining operation in frequency ranges between approximately 800 MegaHertz and approximately 1 GigaHertz and between approximately 1.8 GigaHertz and approximately 2.0 GigaHertz;

a surface plate portion having a length substantially defining operation in a frequency range between approximately 1.7 GigaHertz and approximately 1.9 GigaHertz; and

a slot within the surface plate portion having a length substantially defining operation in a frequency range between 5 and 6 Gigahertz.

15. The wireless communication device of claim 14, wherein the unitary radiating element further comprises a resonant stub substantially defining operation in a frequency range of approximately 2.4 Gigahertz.

16. The wireless communication device of claim 14, wherein the unitary radiating element further comprises a feed element and a ground element coupled to a transceiver.

17. The wireless communication device of claim 14, wherein the antenna operates in 6 bands and is independently tunable in a majority of the 6 bands.

18. The wireless communication device of claim 14, wherein the antenna provides sufficient bandwidth to cover all international 5 Gigahertz bandwidths.

19. The wireless communication device of claim 14, wherein the loop portion substantially defines operation in frequency ranges covering GSM 850 (824–

894 MHz), GSM 900 (880–

960 MHz) and PCS (1850–

1990 MHz).

20. The wireless communication device of claim 14, wherein the length of the surface plate portion substantially defines operation in the DCS 1800 range (1710–

1880 MHz).