| 摘要 |
<p>A radio transceiver (400, 450) is intended for transmission and reception of radio signals in two frequency bands, and it comprises a first signal input (101) for receiving radio signals in the first frequency band, and a second signal input (102) for receiving radio signals in the second frequency band. In addition, it comprises
a first mixer connected to the first signal input (101) for mixing the radio signals (DCS RX) in the first frequency band onto a predetermined first intermediate frequency (IF1);a second mixer (404) for mixing the first intermediate frequency (IF1) onto a predetermined second intermediate frequency (IF2); anda third mixer (402, 461) connected to the second signal input (102) for mixing the radio signals (GSM RX) in the second frequency band onto a predetermined frequency (IF2), which is substantially the same as the second intermediate frequency.</p> |
