System for the coexistence between a plurality of wireless communication modules

• US 8,442,581 B2
• Filed: 01/13/2010
• Issued: 05/14/2013
• Est. Priority Date: 06/05/2009
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Chung, Yuan-Hung, Hsu, Hong-Kai
• Primary Examiner(s): Dao, Minh D
• Application Number:
  US12/686,424
• Publication Number:
  US 20100311339A1
• Time in Patent Office: 1,217 Days
• Field of Search: 455/552.1, 455/127.4, 455/63.3, 455/13.3, 455/168.1, 455/17, 455/83, 455/78, 370/280
• US Class Current: 455/552.1
• CPC Class Codes: H04B 1/0053 with common antenna for more than one band

Abstract

A system for the coexistence between wireless communication modules sharing an antenna is disclosed. A wireless communication chipset includes a first wireless communication module capable of transmitting and receiving first wireless communication signals, a second wireless communication module capable of transmitting and receiving second wireless communication signals and a combine-separate unit capable of generating a first combined signal and separating a second combined signal. The switching device is configured to selectively transmit the first combined signal or receive the second combined signal. The connection device has a first port coupled to an antenna, a second port connected to the first port for transmitting the first combined signal or receiving the second combined signal, and a third port connected to the first port for transmitting or receiving the second wireless communication signals via the second path and the antenna.

Claims

1. A system for the coexistence between a plurality of wireless communication modules sharing an antenna, comprising:

a wireless communication chipset, comprising;

a first wireless communication module capable of transmitting and receiving first wireless communication signals;

a second wireless communication module capable of transmitting and receiving second wireless communication signals; and

a combine-separate unit capable of generating a first combined signal by combining the first and second wireless communication signals, and separating a second combined signal into the first and second wireless communication signals;

a switching device configured to selectively transmit the first combined signal or receive the second combined signal; and

a directional coupler having a first port coupled to the antenna, a second port connected to the first port via a first path for transmitting the first combined signal or receiving the second combined signal via the first path and the antenna, and a third port connected to the first port via a second path for transmitting or receiving the second wireless communication signals via the second path and the antenna.

2. The system as claimed in claim 1, wherein the first path between the first and second ports is a through path having a first path loss, and the second path between the first and third ports is a coupled path having a second path loss smaller than the first path loss.

3. The system as claimed in claim 2, wherein the directional coupler further comprises a fourth port isolated from the first port, connected to the second port via another coupled path, connected to the third port via another through path, and connected to an external node for impedance matching.

4. The system as claimed in claim 1, wherein the first wireless communication module is one of a WLAN, Bluetooth, Global Positioning System (GPS), Zigbee, infrared, Ultra Wide Band (UWB), Near Field Communication (NFC) and Frequency Modulation (FM) modules, and the second wireless communication module is another of the WLAN, Bluetooth, GPS, Zigbee, infrared, UWB, NFC and FM modules.

5. The system as claimed in claim 1, wherein the switching device is integrated in the wireless communication chipset.

6. The system as claimed in claim 1, wherein the switching device is a single-pole double-thrown (SPDT) switch.

7. The system as claimed in claim 6, wherein the SPDT switch is implemented by a double-pole double-thrown (DPDT) switch with a terminal connected to an external node for impedance matching.

8. The system as claimed in claim 1, wherein the switching device is disposed outside the wireless communication chipset.

9. A system for the coexistence between a plurality of wireless communication modules sharing an antenna, comprising:

a wireless communication chipset, comprising;

a first wireless communication module capable of transmitting and receiving first wireless communication signals;

a second wireless communication module capable of transmitting and receiving second wireless communication signals;

a combine-separate unit capable of generating a first combined signal by combining the first and second wireless communication signals, and separating a second combined signal into the first and second wireless communication signals; and

a switching device configured to selectively transmit the first combined signal or receive the second combined signal via the antenna; and

a balun-switch unit configured to selectively transmit or receive the second wireless communication signals via another antenna.

10. The system as claimed in claim 9, wherein the wireless communication chipset further comprises:

a power amplifier unit configured to amplify the first combined signal before being transmitted by the antenna.

11. The system as claimed in claim 10, wherein the power amplifier unit comprises:

a first power amplifier; and

a second power amplifier,

wherein only one of the first and second power amplifiers is configured to amplify the first combined signal before being transmitted by the antenna.

12. The system as claimed in claim 9, wherein the switching device is integrated in the wireless communication chipset.

13. The system as claimed in claim 9, wherein the wireless communication chipset further comprises:

a low noise amplifier (LNA) unit configured to amplify the second combined signal before being separated by the combine-separate unit.

14. The system as claimed in claim 13, wherein the LNA unit comprises:

a first low noise amplifier; and

a second low noise amplifier,

wherein only one of the first and second low noise amplifiers is configured to amplify the second combined signal before being separated by the combine-separate unit.

15. A system for the coexistence between a plurality of wireless communication modules sharing an antenna, comprising:

a wireless communication chipset, comprising;

a first wireless communication module capable of transmitting and receiving first wireless communication signals;

a second wireless communication module capable of transmitting and receiving second wireless communication signals; and

a combine-separate unit capable of generating a first combined signal by combining the first and second wireless communication signals, and separating a second combined signal into the first and second wireless communication signals; and

a hybrid coupler having a first port coupled to the antenna, a second port connected to the first port via a first path for transmitting the first combined signal or receiving the second combined signal via the first path and the antenna, and a third port connected to the first port via a second path for transmitting or receiving the second wireless communication signals via the second path and the antenna.

16. The system as claimed in claim 15, wherein the first and second paths have a path loss of substantially 3 dB.

17. A system for the coexistence between a plurality of wireless communication modules sharing an antenna, comprising:

a wireless communication chipset, comprising;

a first wireless communication module capable of transmitting and receiving first wireless communication signals;

a second wireless communication module capable of transmitting and receiving second wireless communication signals; and

a combine-separate unit capable of generating a first combined signal by combining the first and second wireless communication signals, and separating a second combined signal into the first and second wireless communication signals;

a switching device configured to selectively transmit the first combined signal or receive the second combined signal; and

a power splitter having a first port coupled to the antenna, a second port connected to the first port via a first path for transmitting the first combined signal or receiving the second combined signal via the first path and the antenna, and a third port connected to the first port via a second path for transmitting or receiving the second wireless communication signals via the second path and the antenna.

18. The system as claimed in claim 17, wherein the first path between the first and second ports has a first path loss, and the second path between the first and third ports has a second path loss different from the first path loss.

19. A system for the coexistence between a plurality of wireless communication modules sharing an antenna, comprising:

a wireless communication chipset, comprising;

a first wireless communication module capable of transmitting and receiving first wireless communication signals;

a second wireless communication module capable of transmitting and receiving second wireless communication signals; and

a combine-separate unit capable of generating a first combined signal by combining the first and second wireless communication signals, and separating a second combined signal into the first and second wireless communication signals; and

a power divider having a first port coupled to the antenna, a second port connected to the first port via a first path for transmitting the first combined signal or receiving the second combined signal via the first path and the antenna, and a third port connected to the first port via a second path for transmitting or receiving the second wireless communication signals via the second path and the antenna.