SINGLE-ENDED TO DIFFERENTIAL DUPLEXER FILTER
    2.
    发明申请
    SINGLE-ENDED TO DIFFERENTIAL DUPLEXER FILTER 审中-公开
    单独到差分双工器过滤器

    公开(公告)号:WO2008054615A1

    公开(公告)日:2008-05-08

    申请号:PCT/US2007/021537

    申请日:2007-10-05

    IPC分类号: H03H19/00

    CPC分类号: H04B1/52 H04B1/71

    摘要: According to an exemplary embodiment, a duplexer (300) includes a single-ended to differential filter (302), where the single-ended to differential filter includes a ladder stage (306) coupled to an antenna port (312) of the duplexer (300). The single-ended to differential filter (302) further includes a balun stage (308) coupled to the ladder stage (306). The single- ended to differential filter (302) further includes a lattice stage (310) coupled to the balun stage (308), where the balun stage (308) is configured to provide single-ended to differential signal conversion between the ladder stage (306) and the lattice stage (310). The lattice stage (310) can be coupled to differential receive ports (316,318) of the duplexer (300). The duplexer (300) can further include a single-ended to single-ended filter (304) coupled between the antenna port (312) and a transmit port of the duplexer (314).

    摘要翻译: 根据示例性实施例,双工器(300)包括单端到差分滤波器(302),其中单端到差分滤波器包括耦合到双工器的天线端口(312)的梯级(306) 300)。 单端到差分滤波器(302)还包括耦合到梯级(306)的平衡 - 不平衡转换级(308)。 单端到差分滤波器(302)还包括耦合到平衡 - 不平衡转换级(308)的晶格级(310),其中平衡 - 不平衡转换级(308)被配置为提供梯级( 306)和晶格级(310)。 格子级(310)可耦合到双工器(300)的差分接收端口(316,318)。 双工器(300)还可以包括耦合在天线端口(312)和双工器(314)的发送端口之间的单端到单端滤波器(304)。