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    • 3. 发明公开
    • 하이 패스 필터
    • 旁路过滤器
    • KR1020080104389A
    • 2008-12-02
    • KR1020087026999
    • 2002-08-12
    • 히타치 긴조쿠 가부시키가이샤
    • 후카마치게이스케겜모치시게루와타나베미츠히로다케타쓰요시다이히로유키요코우치사토루
    • H03H7/01H04B1/44
    • H03H7/465H03H7/0115H03H7/0153H03H7/1758H03H7/1766H03H7/1783H03H2001/0085H04B1/0057H04B1/006H04B1/406H04B1/44H04B1/48H04B1/52
    • A multi-band antenna switch circuit including a diplexer connected to an antenna terminal for demultiplexing signals of different passing bands, a first and a second switch circuit for switching a high frequency signal and a low frequency signal demultiplexed by the diplexer to a plurality of transmission/reception terminals, a first and a second low pass filter connected to a transmission path between the diplexer and the transmission terminal or between the first and the second switch circuit and the transmission terminal, and a notch filter provided between the diplexer and the first switch circuit or between the diplexer and the second switch circuit. The multi-band antenna switch circuit includes a high pass filter having an input terminal and an output terminal and provided at least between the diplexer and the antenna terminal and including a first inductor connected between the input terminal and the ground, a first capacitor connected between the input terminal and the output terminal, a second inductor connected to the output terminal, and a second capacitor connected between the second inductor and the ground. ® KIPO & WIPO 2009
    • 一种多频带天线切换电路,包括连接到天线端子的双工器,用于对不同通带的信号进行解复用;第一和第二开关电路,用于将高频信号和由双工器解复用的低频信号切换成多个传输 连接到双工器和传输终端之间或第一和第二开关电路和传输终端之间的传输路径的第一和第二低通滤波器,以及设置在双工器和第一开关之间的陷波滤波器 电路或双工器与第二开关电路之间。 多频带天线切换电路包括具有输入端和输出端并具有至少在双工器与天线端子之间并包括连接在输入端与地之间的第一电感器的高通滤波器,第一电容器连接在 输入端子和输出端子,连接到输出端子的第二电感器,以及连接在第二电感器和地之间的第二电容器。 ®KIPO&WIPO 2009