| 摘要 |
The invention relates to a RF front-end stage for user equipment that is designed for use in multiple communication bands and employs Frequency Division Duplex (FDD). The invention also relates to a FDD front-end module included in such a RF front-end stage. The object of the invention is to provide an RF front-end stage for user equipment that supports a plurality of operating bands and may be produced both at lower costs and with a reduced number of circuit element devices. This object is achieved with a FDD front-end module for a RF front-end stage of a FDD user equipment that supports at least two operating bands each comprising an uplink frequency sub-band and a downlink frequency sub-band wherein at least one of the uplink frequency sub-bands and the downlink frequency sub-bands of said at least two operating bands are not adjacent to each other. |
