RF Front-end Circuit and Wireless Communication Device Using the Same

• US 20110159823A1
• Filed: 12/02/2010
• Published: 06/30/2011
• Est. Priority Date: 12/25/2009
• Status: Abandoned Application

• Current Assignee: Ralink Technology Corporation (MediaTek, Inc.)
• Original Assignee: Ralink Technology Corporation (MediaTek, Inc.)
• Inventors: Hsu, Min-Shun, Lo, Shao-Chin
• Application Number:
  US12/959,346
• Publication Number:
  US 20110159823A1
• Time in Patent Office: Days
• US Class Current: 455/78
• CPC Class Codes: H04B 1/005 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges

Abstract

The present invention discloses an RF front-end circuit for a wireless communication device, which includes an RF terminal coupled to an antenna of the wireless communication device, for receiving or transmitting wireless signals; and a switch for connecting a plurality of processing modules to the RF terminal according to operations of the wireless communication device.

Claims

1. A radio frequency (RF) front-end circuit for a wireless communication device, comprising:

an RF terminal coupled to an antenna of the wireless communication device, for receiving or transmitting wireless signals; and

a switch for connecting a plurality of processing modules to the RF terminal according to operations of the wireless communication device.

2. The RF front-end circuit of claim 1, wherein the plurality of processing modules comprises:

a plurality of reception modules for processing received signals; and

a plurality of transmission modules for processing transmission signals.

3. The RF front-end circuit of claim 2, wherein the plurality of reception modules comprises:

a first reception module for processing a received signal of a first frequency; and

a second reception module for processing a received signal of a second frequency; and

the plurality of transmission modules comprises;

a first transmission module for processing a transmission signal of the first frequency; and

a second transmission module for processing a transmission signal of the second frequency.

4. The RF front-end circuit of claim 1, wherein a processing module of the plurality of processing modules comprises:

an amplifier coupled to the switch for amplifying a first received signals and a second received signal;

a first reception module for processing the first received signal;

a second reception module for processing the second received signals; and

a matching circuit coupled to the amplifier, the first reception module and the second reception module, for separating the first received signal and the second received signal.

5. The RF front-end circuit of claim 4, wherein the first received signal is received at a first frequency and the second received signal is received at a second frequency.

6. The RF front-end circuit of claim 1, further comprising a controller for controlling the switch according to the operations of the wireless communication device.

7. The RF front-end circuit of claim 1, wherein the plurality of wireless communication systems apply different frequency bands.

8. The RF front-end circuit of claim 1, wherein the switch is a single pole triple throw (SP3T) switch.

9. The RF front-end circuit of claim 1, wherein the switch is a single pole four throw (SP4T) switch.

10. A wireless communication device comprising a radio frequency front-end circuit of claim 1 for processing signals corresponding to a plurality of wireless communication systems.