Invention Application
US20070085754A1 RF front-end architecture for a separate non-50 ohm antenna system
审中-公开
RF前端架构,用于单独的非50欧姆天线系统
- Patent Title: RF front-end architecture for a separate non-50 ohm antenna system
- Patent Title (中): RF前端架构,用于单独的非50欧姆天线系统
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Application No.: US11253011Application Date: 2005-10-18
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Publication No.: US20070085754A1Publication Date: 2007-04-19
- Inventor: Juha Ella , Jani Ollikainen , Tero Ranta , Anping Zhao , Jussi Rahola
- Applicant: Juha Ella , Jani Ollikainen , Tero Ranta , Anping Zhao , Jussi Rahola
- Assignee: Nokia Corporation
- Current Assignee: Nokia Corporation
- Main IPC: H01Q1/50
- IPC: H01Q1/50

Abstract:
A transceiver system having an RF front-end operatively connected to two separate non-50 ohm antennas for separately providing transmission/reception paths for 1 GHz band and for 2 GHz band. A switching module is operatively connected to each antenna for mode and frequency-range selection within each band. Each switching module has a plurality of switching elements connected to a plurality of signal paths. Matching is separately and independently provided for each signal path. The matching can be achieved by using distributed elements or lumped elements arranged in shunt or series in order to widen the bandwidth. An electrostatic discharge protection circuit is provided between the antenna feed point and the switching module. The protective circuit can also be used as a discrete matching network that can be optimized depending on the phone mechanics and dimensions.
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