MOBILE WIRELESS COMMUNICATIONS DEVICE HAVING DUAL ANTENNA SYSTEM FOR CELLULAR AND WIFI

• US 20080055163A1
• Filed: 08/31/2006
• Published: 03/06/2008
• Est. Priority Date: 08/31/2006
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Qi, Yihong, Man, Ying Tong
• Granted Patent: US 7,369,091 B2
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/2291 used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN] H01Q1/241 takes precedence; WLAN in general H04W
• 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 1/523 between antennas of an array
• CPC Class Codes: H01Q 21/0087 Apparatus or processes specially adapted for manufacturing antenna arrays manufacturing waveguides H01P11/00
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 25/00 Antennas or antenna systems providing at least two radiating patterns arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00
• CPC Class Codes: H01Q 9/045 with particular feeding means for circular polarisation H01Q9/0428
• CPC Class Codes: H04M 1/026 Details of the structure or mounting of specific components
• CPC Class Codes: Y10T 29/49016 Antenna or wave energy "plumbing" making
• CPC Class Codes: Y10T 29/49018 with other electrical component

Abstract

A mobile wireless communications device includes a housing and circuit board carried by the housing. Radio Frequency (RF) circuitry is mounted on the circuit board. A first antenna is supported by the circuit board within the housing and operatively connected to the RF circuitry and configured for cellular phone communications A second antenna is supported by the circuit board within the housing and operatively connected to the RF circuitry and configured for WiFi communications. The second antenna comprises an inverted-F or monopole antenna having an opening gap that is pointed away from the first antenna.

Claims

1. A mobile wireless communications device, comprising:

a housing having an upper and lower portion;

a circuit board carried by the housing and including radio frequency (RF) circuitry;

a first antenna supported by the circuit board at the lower portion within the housing and operatively connected to said RF circuitry and configured for cellular phone communications; and

a second antenna supported by the circuit board within the upper portion of the housing and operatively connected to said RF circuitry and configured for WiFi communications, wherein said second antenna comprises an inverted-F antenna having a substantially rectangular configuration in plan and upper edge forming an opening gap that is pointed away from the first antenna for isolating first and second antennas from each other said second antenna including a lower edge and a feeding point and grounding point at opposite corners of the lower edge wherein mutual coupling due to harmonics between first and second antennas is reduced.

2. The mobile wireless communications device according to claim 1, wherein said first antenna is operative at frequencies in the Global System for Mobile (GSM) communications band.

3. The mobile wireless communications device according to claim 1, wherein said second antenna is operative at the 2.4 GHz and 5.0 GHz band in accordance with 802.11 standards.

4. The mobile wireless communications device according to claim 1, wherein said second antenna includes a feeding point positioned distal from the opening gap at an opposing end from the opening gap.

7. The mobile wireless communications device according to claim 1, wherein said circuit board comprises a ground plane for said second antenna.

10. The mobile wireless communications device according to claim 1, wherein said second antenna is configured at a quarter or half lamda in length.

5. (canceled)

6. The mobile wireless communications device according to claim 5, wherein the opening gap is configured upward towards the upper portion of the housing.

8. (canceled)

9. (canceled)

11. A mobile wireless communications device, comprising:

a housing having an upper portion and lower portion;

a circuit board carried by the housing and including radio frequency (RF) circuitry;

a cellular antenna supported by the circuit board at the lower portion of the housing and operatively connected to said RF circuitry and configured for multi-frequency cellular phone communications, including frequencies in the Global System for Mobile (GSM) communications band; and

a substantially rectangular configured inverted-F antenna supported by the circuit board within the upper portion of the housing and operatively connected to said RF circuitry for WiFi communications and having upper edge forming an opening gap that is pointed away from the cellular antenna and a lower edge and bottom feeding point and grounding point at opposite corners at the lower edge and positioned distal from the opening gap towards the cellular antenna and lower portion of the housing for isolating the cellular antenna and inverted-F antenna from each other and reducing mutual coupling due to harmonics between first and second antennas.

12. The mobile wireless communications device according to claim 11, wherein inverted-F antenna is operative at the 2.4 GHz and 5.0 GHz band in accordance with 802.11 standards for WiFi communications.

14. The mobile wireless communications device according to claim 11, wherein said circuit board comprises a ground plane for said inverted-F antenna.

15. The mobile wireless communications device according to claim 11, wherein said circuit board comprises a ground plane for said cellular antenna.

18. The mobile wireless communications device according to claim 11, wherein said inverted-F antenna is configured at a quarter or half lamda in length.

13. (canceled)

16. (canceled)

17. The mobile wireless communications device according to claim 16, wherein said inverted-F antenna includes a lower edge, and a feeding point and grounding point at opposite corners on the lower edge.

19. A method for making a mobile wireless communications device, which comprises:

providing a housing having an upper and lower portion;

mounting a circuit board having radio frequency (RF) circuitry thereon within the housing; and

supporting first and second antennas by the circuit board such that first and second antennas are connected to the RE circuitry, wherein the first antenna is configured for cellular phone communications and supported at the lower portion of the circuit board and the second antenna is configured for WiFi communications as monopole antenna having an upper edge and forming as opening gap that is pointed away from the first antenna for isolating the first and second antennas from each other wherein said second antenna includes a lower edge and a feeding point and grounding point at opposite corners at the lower edge wherein mutual coupling due to harmonics between first and second antennas are reduced.

20. The method according to claim 19 which further comprises forming the first antenna to be operative at frequencies in the Global System for Mobile (GSM) communications band.

21. The method according to claim 19, which further comprises forming the second antenna to be operative at the 2.4 GHz and 5.0 GHz band in accordance with 802.11 standards.

22. The method according to claim 19, which further comprises forming the circuit board as a ground plane for first and second antennas.

25. The method according to claim 19, which further comprises forming the second antenna at a quarter or half lamda in length.

23. (canceled)

24. (canceled)

26. A mobile wireless communications device, comprising:

a housing having an upper and lower portion;

a circuit board carried by the housing and including radio frequency (RF) circuitry;

a first antenna supported at the lower portion within the housing and operatively connected to said RF circuitry and configured for cellular phone communications; and

a second antenna supported at the upper portion of the housing and operatively connected to said RF circuitry and configured for WiFi communications, wherein said second antenna comprises an inverted-F antenna having a substantially rectangular configuration in plan and upper edge forming an opening gap that is pointed away from the first antenna for isolating first and second antennas from each other, said second antenna including a lower edge and a feeding point and grounding point at opposite corners of the lower edge wherein mutual coupling due to harmonics between first and second antennas is reduced.

27. The mobile wireless communications device according to claim 26, wherein at least one of said first antenna and second antenna are supported by the circuit board.

28. The mobile wireless communications device according to claim 26, and further comprising .a second circuit board, wherein said first antenna is supported by one of said circuit boards and said second antenna is supported by the other circuit board.

29. The mobile wireless communications device according to claim 26, wherein at least one of said first and second antenna are supported by said housing.