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    • 15. 发明授权
    • Surface acoustic wave filter having parallel/serial resonator connection
based on transmitting and receiving frequencies
    • 具有基于发射和接收频率的并联/串联谐振器连接的表面声波滤波器
    • US5589806A
    • 1996-12-31
    • US368981
    • 1995-01-05
    • Yutaka TaguchiKazuo EdaShun-ichi SekiKeiji Onishi
    • Yutaka TaguchiKazuo EdaShun-ichi SekiKeiji Onishi
    • H03H9/64H03H9/72
    • H03H9/6483H03H9/64
    • A surface acoustic wave filter having a configuration in which a plurality of series surface acoustic wave resonators and parallel surface acoustic wave resonators are connected is used as a receiving filter included in a receiving circuit of a communication apparatus capable of simultaneously transmitting and receiving signals. When the transmitting frequency is higher than the receiving frequency, one of the parallel surface acoustic wave resonator, connected between the signal line and the ground, is disposed most closely to the input terminal of the filter. When the transmitting frequency is lower than the receiving frequency, one of the series surface acoustic wave resonator, connected in series to the signal line, is disposed most closely to the input terminal of the filter. Accordingly, the singular point of the filter is prevented from coinciding with the transmitting frequency, so that the deterioration of the resonator is prevented.
    • 使用具有多个串联声表面波谐振器和平行声表面波谐振器连接的结构的声表面波滤波器作为能够同时发送和接收信号的通信装置的接收电路中的接收滤波器。 当发射频率高于接收频率时,连接在信号线和地之间的平行声表面波谐振器之一最靠近滤波器的输入端设置。 当发送频率低于接收频率时,与信号线串联连接的串联声表面波谐振器中的一个最靠近滤波器的输入端设置。 因此,防止滤波器的奇异点与发射频率一致,从而防止谐振器的劣化。
    • 16. 发明授权
    • Balanced type surface acoustic wave device
    • 平衡型声表面波装置
    • US5892418A
    • 1999-04-06
    • US898769
    • 1997-07-23
    • Keiji OnishiKazuo EdaYutaka TaguchiShunichi Seki
    • Keiji OnishiKazuo EdaYutaka TaguchiShunichi Seki
    • H03H9/25H03H9/00H03H9/64
    • H03H9/6436H03H9/0038H03H9/0042H03H9/1071H03H9/6433
    • The present invention provides surface acoustic wave devices which do not require a balanced-to-unbalanced transformer circuit regardless of the type of the peripheral circuits of the balanced type surface acoustic wave filter, i.e. a balanced type device or an unbalanced type. A transmitting interdigital transducer and a receiving interdigital transducer are formed on a substrate comprising 41.degree. Y cut-X propagation lithium niobate. A balanced type surface acoustic wave filter is formed on a substrate comprising 36.degree. Y cut-X propagation lithium tantalate. The balanced type surface acoustic wave filter comprises two series-arm surface acoustic wave resonators and two crossed-arm surface acoustic wave resonators connected in a lattice. The substrate on which the transmitting interdigital transducer and the receiving interdigital transducer are formed and the substrate on which the balanced type surface acoustic wave filter is formed are located in a ceramic package. One of the input terminals of the transmitting interdigital transducer is grounded. The output terminals of the receiving interdigital transducer are connected to the input terminals of the balanced type surface acoustic wave filter.
    • 本发明提供了不需要平衡型不平衡变压器电路的表面声波装置,而不管平衡型表面声波滤波器的外围电路的类型,即平衡型装置或不平衡型。 在包含41°Y切割X传播铌酸锂的基板上形成发射叉指式换能器和接收叉指式换能器。 在包含36°Y切割X传播的钽酸锂的基板上形成平衡型表面声波滤波器。 平衡型表面声波滤波器包括两个串联臂表面声波谐振器和两个以格子连接的交叉臂表面声波谐振器。 其上形成有发送叉指式换能器和接收叉指式换能器的基板和形成有平衡型表面声波滤波器的基板位于陶瓷封装中。 发射叉指式换能器的输入端之一接地。 接收叉指式换能器的输出端连接到平衡型声表面波滤波器的输入端。
    • 17. 发明授权
    • Surface acoustic wave device mounted module
    • 表面声波装置安装模块
    • US5459368A
    • 1995-10-17
    • US278905
    • 1994-07-22
    • Keiji OnishiShunichi SekiYutaka TaguchiKazuo Eda
    • Keiji OnishiShunichi SekiYutaka TaguchiKazuo Eda
    • H03H9/10H03H9/02H03H9/25H01L41/08
    • H03H9/1071H03H9/0542H03H9/0557H03H9/059H03H9/1085H01L2224/16225H01L2224/16235H01L2224/32225H01L2224/73203H01L2224/73204H01L2224/73253H01L2924/01046H01L2924/01079H01L2924/09701H01L2924/15192H01L2924/16152H01L2924/16195H01L2924/19105H01L2924/3011H01L2924/3025
    • This invention provides a surface acoustic wave device mounted module which is miniature, light, and highly reliable. The surface acoustic wave device mounted module also has excellent frequency characteristics. The surface acoustic wave device mounted module includes a multilayer substrate which has at least one layer of a shield pattern, input-output electrodes, grounding electrodes, through holes used for connecting electrodes, and a surface acoustic wave element. The surface acoustic wave element has metallic bumps, which are transfer-coated with a conductive resin, on electrode pads and an insulating resin around the surface acoustic wave element. The electrode pads are input-output terminals and grounding terminals formed on the surface acoustic wave element. Continuities between the input-output terminals and the input-output electrodes, and between the grounding terminals and the grounding electrodes are established by the through holes. An electrode pattern is formed on the surface of the multilayer substrate facing and surrounding the surface acoustic wave element. A metallic lid is attached to the electrode pattern by a solder or a conductive resin so that the surface acoustic wave element is sealed in an airtight condition. The electrode pattern is connected to the grounding electrodes by the through holes.
    • 本发明提供一种微型,轻型,高可靠性的表面声波装置安装模块。 表面声波装置安装模块也具有优异的频率特性。 表面声波装置安装模块包括具有至少一层屏蔽图案,输入输出电极,接地电极,用于连接电极的通孔和表面声波元件的多层基板。 表面声波元件具有金属凸块,其在电极焊盘上传导涂覆有导电树脂,并在表面声波元件周围具有绝缘树脂。 电极焊盘是形成在声表面波元件上的输入输出端子和接地端子。 输入输出端子与输入输出电极之间以及接地端子与接地电极之间的连续性由通孔构成。 在面对并围绕声表面波元件的多层基板的表面上形成电极图案。 通过焊料或导电树脂将金属盖附接到电极图案,使得表面声波元件在气密状态下被密封。 电极图案通过通孔与接地电极连接。