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    • 2. 发明公开
    • 이동통신기기용 앞단 모듈
    • 移动通信设备的前端模块
    • KR1020020015260A
    • 2002-02-27
    • KR1020010011594
    • 2001-03-07
    • 티디케이가부시기가이샤
    • 하라다노부미수가사토시타다노히로시하세가와히데키
    • H04B1/44
    • H04B1/52H03H7/46H05K1/0237H05K1/0306H05K1/16H05K1/181
    • PURPOSE: To provide a front end module for mobile communication device employing a multi-layered board that is compatible with different communication systems with different frequency bands and hardly causes interference among circuits even when the board is miniaturized. CONSTITUTION: The front end module consists of the multi-layered board and surface mount components. Furthermore, the front end module configures a high frequency circuit provided with an antenna switch mainly using an LC circuit, a filter and a branching filter circuit. Moreover, the front end configures a front end for a transmission reception circuit provided with a plurality of transmission reception functions with different communication systems. Branching filter circuit patterns 211-218 are arranged at a center position in a plane direction of the multi-layered board. A plurality of antenna switch conductor patterns 222-226 and 232-236 are arranged symmetrically by using the branching filter circuit patterns 211-218 for a border.
    • 目的:提供一种采用多层板的移动通信设备的前端模块,该多层板与具有不同频带的不同通信系统相兼容,并且几乎不会在电路板小型化之间引起电路之间的干扰。 构成:前端模块由多层板和表面贴装组件组成。 此外,前端模块主要使用LC电路,滤波器和分支滤波器电路来配置设置有天线开关的高频电路。 此外,前端配置具有不同通信系统的多个发送接收功能的发送接收电路的前端。 分支滤波器电路图案211-218布置在多层板的平面方向上的中心位置。 多个天线开关导体图案222-226和232-236通过使用用于边界的分支滤波器电路图案211-218对称地布置。