Full-duplex transceiver with distributed duplexing function
US6795690B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1999 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Oct 12, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/56
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A duplex radio transceiver, coupled to baseband circuitry and to an antenna, includes a receive chain, a transmit chain and a duplexer. The transmit chain includes filter components that attenuate signals originating from the transmit chain in a receive frequency band by a stop-band attenuation that is approximately equal to or greater than the stop-band attenuation of the duplexer in the receive band. Similarly, the receive chain includes filter components filter components that attenuate signals in a transmit frequency band by a stop-band attenuation that is approximately equal to or greater than the stop-band attenuation of the duplexer in the transmit band. A bias control circuit senses a power level associated with radio signals in the transmit chain and adjusts an amplifier in the receive chain responsive to the power level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.