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US 8,138,853 B2Granted
Front-end architecture of RF transceiver and transceiver chip thereof
AssigneeRalink Technology Corporation
InventorChun Hsueh Chu
Life of this patent
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Abstract
An RF front-end architecture is operated in either a transmitting or a receiving mode. The RF front-end architecture comprises an antenna, an impedance match network, a balun and a transceiver chip. The transceiver chip comprises first and second transmit/receive (TR) switches, a transmitter, and a receiver. Because two TR switches are integrated into the chip, the printed circuit board area, BOM cost and pin count of the transceiver chip can be greatly reduced.
Claims8
A circuit of a radio frequency (RF) transceiver comprising:
- a first antenna and a second antenna configured to selectively receive or transmit an RF signal;
- a first transmit/receive (T/R) switch connected to the first antenna;
- a transceiver chip including a receiver unit, a transmitter unit and a second T/R switch;
- a first impedance matching unit connected to the first T/R switch, the first impedance matching unit being configured to convert the RF signal of the first antenna into a first differential signal under a receiving mode of the first antenna and then to transmit the first differential signal to the receiver unit;
- a second impedance matching unit connected to the first T/R switch, the second impedance matching unit being configured to convert a second differential signal of the transmitter unit into the RF signal of the first antenna under a transmitting mode of the first antenna;
- and
- a third impedance matching unit configured to convert an RF signal of the second antenna into a third differential signal under a receiving mode of the second antenna and then to transmit the third differential signal to the receiver unit through the second T/R switch, and the third impedance matching unit configured to convert the third differential signal from the transmitter unit through the second T/R switch into the RF signal of the second antenna under a transmitting mode of the second antenna,
- wherein both the first impedance matching unit and the second impedance matching unit are coupled to the first antenna via the first T/R switch.
5 more elements
A circuit of a radio frequency (RF) transceiver comprising:
- a first antenna and a second antenna configured to selectively receive or transmit an RF signal;
- a first transmit/receive (T/R) switch connected to the first antenna;
- a first impedance matching network connected to the first T/R switch for matching a first input signal;
- a second impedance matching network connected to the first T/R switch for matching a first output signal;
- a third impedance matching network connected to the second antenna for matching a second input/output signal and connected to a second T/R switch and a third T/R switch
- to receive one of the first input signal and the second input/output signal under a receiving mode, and to transmit one of the first output signal and the second input/output signal under a transmitting mode,
- wherein both the first impedance matching unit and the second impedance matching unit are coupled to the first antenna via the first T/R switch.
4 more elements
Dependencies are inferred from the claim text.