Patent ID: 6861924

Claim:
A duplexer device comprising a plurality of duplexers for wireless communication systems, the communication systems using different frequency bands, each communication system being characterized by its transmission band, reception band and duplexer spacing, wherein each duplexer is configured for sending and receiving in a respective communication system, wherein the reception band is divided into a number N>1 of reception sub-bands; the transmission band is divided into a number N>1 of transmission sub-bands; a i-th sub-band pair comprises a i-th reception and a i-th transmission sub-band, i being an ordinal number from 1 to N; in all sub-band pairs the central frequencies of the i-th reception and the i-th transmission sub-band are separated by the duplexer spacing; the duplexer comprising: a reception band filter comprising N reception sub-filters; a transmission band filter comprising N transmission sub-filters; N reception sub-paths and N reception sub-filters, the i-th reception sub-filter arranged in the i-th reception sub-path, the pass-band of the i-th reception sub-filter being the i-th reception sub-band. N transmission sub-paths and N transmission sub-filters, the i-th transmission sub-filter arranged in the i-th transmission sub-path, the pass-band of the i-th transmission sub-filter being the i-th transmission sub-band; N filter pairs, a i-th filter pair comprising the i-th reception and the i-th transmission sub-filter; and switch elements configured to switch between the N filter pairs; wherein the i-th reception and the i-th transmission sub-path are connected in parallel on the antenna side; and wherein in at least one filter of the reception band filter and the transmission band filter the corresponding sub-filters are SAW-filters realized on a common piezoelectric substrate.