| 摘要 |
In a duplexer for a wireless communication system that comprises a transmission and a reception band, the present invention provides that a split surface wave filter be provided as an input and/or output filter, this split surface wave filter comprising at least two sub-filters that cover neighboring frequency sub-ranges of the corresponding band and supplementing one another to the overall band. At least two pairs of sub-filters are provided that respectively comprise a filter in the input and output filter. Switching between the at least two pairs can be carried out with a switch. Given the same duplexer spacing, a higher band spacing that can be realized with SAW filters is created between transmission and reception band or the corresponding frequency sub-ranges.
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