公开(公告)号：EP1035648A2

公开(公告)日：2000-09-13

申请号：EP00104611.9

申请日：2000-03-03

申请人： Matsushita Electric Industrial Co., Ltd.

发明人： Sakuragawa, Toru ,  Sato, Yuki ,  Fujii. Katsuya ,  Murakami, Kozo ,  Takayama, Ryoichi

IPC分类号： H03H9/64

CPC分类号： H03H9/6483 ,  H03H9/725

摘要： The present invention relates to a band switching filter including a resonator circuit having a surface acoustic wave resonator, a switching element and an independance element and selectively passing or attenuating a signal through only one pass band of different two pass bands with a single filter and the resonant frequency of the resonator circuit can be shifted to any other frequency by switching a connection state of the surface acoustic wave resonator and the impedance element by open-or short-circuiting the switching element and results in the number of filter stages can be reduced and the band switching filter using the resonator and an antenna duplexer using the band switching filter can be miniaturized, the permanent magnet.

摘要翻译： 本发明涉及一种频带切换滤波器，其包括谐振器电路，该谐振器电路具有表面声波谐振器，开关元件和独立元件，并且利用单个滤波器选择性地通过或衰减仅通过不同的两个通带的一个通带， 通过使开关元件开路或短路来切换声表面波谐振器和阻抗元件的连接状态，可以将谐振器电路的谐振频率转换到任何其他频率，并且导致滤波器级的数量可以减少并且 使用谐振器的频带切换滤波器和使用频带切换滤波器的天线双工器可以小型化，即永磁体。

公开(公告)号：EP1463200A2

公开(公告)日：2004-09-29

申请号：EP04007553.3

申请日：2004-03-29

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人： Nakamura, Hiroyuki ,  Seki, Shunichi ,  Nishimura, Kazunori ,  Sakuragawa, Toru

IPC分类号： H03H9/64

CPC分类号： H03H9/6483 ,  H03H9/0274 ,  H03H9/02748 ,  H03H9/14547

摘要： A SAW resonator includes an IDT electrode (13) formed on a piezoelectric substrate and reflector electrodes (14,15) disposed on both sides of the IDT electrode. The IDT electrode includes first finger-electrodes (132), second finger-electrodes (134) and strip-line electrodes (135). The first and the second finger-electrodes do not overlap with each other but are acoustically coupled together by the strip-line electrodes. This acoustic coupling by the strip-line electrodes eliminates the need for a common bus-bar electrode, so that the loss caused by the resistance of the common bus-bar electrode can be reduced, and the SAW resonator can be downsized.

摘要翻译： SAW谐振器包括在压电基片上形成的IDT电极（13）和位于IDT电极两侧的反射器电极（14,15）。 IDT电极包括第一指状电极（132），第二指状电极（134）和带状线电极（135）。 第一和第二指状电极彼此不重叠，但是通过带状线电极声学耦合在一起。 通过带状线电极的这种声学耦合消除了对公共母线电极的需求，从而可以减小由公共母线电极的电阻引起的损耗，并且可以使SAW谐振器小型化。

公开(公告)号：EP1463200A3

公开(公告)日：2004-10-06

申请号：EP04007553.3

申请日：2004-03-29

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人： Nakamura, Hiroyuki ,  Seki, Shunichi ,  Nishimura, Kazunori ,  Sakuragawa, Toru

IPC分类号： H03H9/64

CPC分类号： H03H9/6483 ,  H03H9/0274 ,  H03H9/02748 ,  H03H9/14547

摘要： A SAW resonator includes an IDT electrode (13) formed on a piezoelectric substrate and reflector electrodes (14,15) disposed on both sides of the IDT electrode. The IDT electrode includes first finger-electrodes (132), second finger-electrodes (134) and strip-line electrodes (135). The first and the second finger-electrodes do not overlap with each other but are acoustically coupled together by the strip-line electrodes. This acoustic coupling by the strip-line electrodes eliminates the need for a common bus-bar electrode, so that the loss caused by the resistance of the common bus-bar electrode can be reduced, and the SAW resonator can be downsized.

公开(公告)号：EP1035648A3

公开(公告)日：2000-12-27

申请号：EP00104611.9

申请日：2000-03-03

申请人： Matsushita Electric Industrial Co., Ltd.

发明人： Sakuragawa, Toru ,  Sato, Yuki ,  Fujii. Katsuya ,  Murakami, Kozo ,  Takayama, Ryoichi

IPC分类号： H03H9/64 ,  H03H9/72

CPC分类号： H03H9/6483 ,  H03H9/725

摘要： The present invention relates to a band switching filter including a resonator circuit having a surface acoustic wave resonator, a switching element and an independance element and selectively passing or attenuating a signal through only one pass band of different two pass bands with a single filter and the resonant frequency of the resonator circuit can be shifted to any other frequency by switching a connection state of the surface acoustic wave resonator and the impedance element by open-or short-circuiting the switching element and results in the number of filter stages can be reduced and the band switching filter using the resonator and an antenna duplexer using the band switching filter can be miniaturized, the permanent magnet.

摘要翻译： 本发明涉及于一频带切换滤波器，其包括具有表面声波谐振器，开关元件和独立性元件的并选择性地仅通过一个通带不同的两个匹配频带的具有单个滤波器和通过或衰减的信号的谐振器电路 谐振器电路的谐振频率可以通过切换表面声波谐振器的连接状态，并通过打开或短路在滤波器级的数量的开关元件和结果能够降低阻抗元件被移动到任何其他的频率和 利用在使用所述频带切换滤波器天线双工器的谐振器和永久磁铁频带切换滤波器可以小型化，则。