Adjustable electronic duplexer
US7330500B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 2002 |
| Grant date | Feb 12, 2008 |
| Priority date | — |
| Expiry date | Nov 14, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/525
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A duplexer for a communication device having a transmission unit, a reception unit and a shared antenna is disclosed. The duplexer comprises a first signal path between the transmission unit and the reception unit, the first signal path comprises a filter unit filtering the reception signal, the filtering unit provides a filtered signal to the reception unit. The duplexer further comprises a second signal path between the transmission unit and the reception unit. The second signal path comprises a cancellation unit which receives a sample of the transmission signal and produces a compensation signal. The injection of the compensation signal to the first signal path reduces the leakage signal, thereby producing a substantially leakage-free reception signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.