Radio transceiver with two frequency bands
    2.
    发明公开
    Radio transceiver with two frequency bands 有权
    具有两个频段的无线电收发机

    公开(公告)号:EP0917297A3

    公开(公告)日:2003-03-12

    申请号:EP98660123.5

    申请日:1998-11-12

    申请人: Nokia Corporation

    IPC分类号: H04B1/40 H04B1/26

    CPC分类号: H04B1/0071 H04B1/0082

    摘要: 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); and a 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.

    摘要翻译: 无线电收发器(400,450)用于在两个频带中发送和接收无线电信号,并且它包括用于接收第一频带中的无线电信号的第一信号输入端(101)和用于接收第一频带中的无线电信号的第二信号输入端(102) 用于接收第二频带中的无线电信号。 此外,它包括连接到第一信号输入端(101)的第一混频器,用于将第一频带中的无线电信号(DCS RX)混合到预定的第一中频(IF1)上; 第二混合器(404),用于将第一中频(IF1)混合到预定的第二中频(IF2)上; 以及连接到第二信号输入端(102)的第三混频器(402,461),用于将第二频带中的无线电信号(GSM RX)混合到预定频率(IF2),该预定频率(IF2)基本上与第二中频 。