Versatile RF front-end multiband mobile terminals
US6751470B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2002 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Jun 20, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/406
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A function-oriented manufacturing approach in RF front-end architecture for use in a multi-band mobile phone. Electronic components in a front-end module, such as low-noise amplifiers that require the demanding silicon bipolar process, are fabricated separately from those components in an RF-ASIC that require the less demanding, yet more costly, Bi-CMOS process. When the transmission frequency band and the receiving band overlap, separate receiving antenna and transmitting antenna are used, instead of an antenna switch module with a duplexer, connected to separate bandpass filters for band selection. Differential Rx antennas are used so that the whole Rx-chain can be made differential. Furthermore, different impedances for Tx out and Rx in can be realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.