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    • 4. 发明公开
    • 대역통과 필터 및 이것을 사용한 무선통신기기
    • BANDPASS过滤器和无线通信使用相同的设备
    • KR1020060113539A
    • 2006-11-02
    • KR1020060038707
    • 2006-04-28
    • 쿄세라 코포레이션
    • 니노미야히로시나카마타카츠로
    • H01P1/20
    • H01P1/20345
    • A bandpass filter and a wireless communication device using the same are provided to increase a frequency rejection property at a narrow frequency band by adjusting capacitance of capacitors in a resonator. A bandpass filter includes plural resonators(1-6) which are formed on a dielectric layer. The resonators are made of a conductive pattern whose length in a signal propagation direction corresponds to 1/4 lambda, where the lambda is a full wavelength at a center frequency in a pass band. A non-ground terminal of a first resonator is coupled with an input terminal electrode(IN), while a non-ground terminal of a last resonator is coupled with an output terminal electrode(OUT). Adjacent resonators between the first and last resonators are electromagnetically coupled with each other. The non-ground terminal of the first resonator is coupled with non-ground terminals of middle resonators via capacitors(C1-C6).
    • 提供带通滤波器和使用该带通滤波器的无线通信装置,以通过调节谐振器中的电容器的电容来增加窄频带处的频率抑制特性。 带通滤波器包括形成在电介质层上的多个谐振器(1-6)。 谐振器由导体图案制成,其信号传播方向的长度对应于1/4λ,其中λ是通带中心频率处的全波长。 第一谐振器的非接地端与输入端电极(IN)耦合,而最后谐振器的非接地端与输出端电极(OUT)耦合。 第一和最后谐振器之间的相邻谐振器彼此电磁耦合。 第一谐振器的非接地端子经由电容器(C1-C6)与中间谐振器的非接地端子耦合。