公开(公告)号：US06909341B2

公开(公告)日：2005-06-21

申请号：US10168284

申请日：2001-10-23

申请人： Ryoichi Takayama ,  Hidekazu Nakanishi ,  Tetsuo Kawasaki ,  Toru Sakuragawa ,  Yasuhiko Yokota

发明人： Ryoichi Takayama ,  Hidekazu Nakanishi ,  Tetsuo Kawasaki ,  Toru Sakuragawa ,  Yasuhiko Yokota

IPC分类号： H03H3/08 ,  H03H9/02 ,  H03H9/145 ,  H03H9/64

CPC分类号： H03H9/02661 ,  H03H3/08 ,  H03H9/02897 ,  H03H9/02929 ,  H03H9/14541 ,  Y10T29/42

摘要： In a surface acoustic wave (SAW) filter including a substrate and an electrode formed on the substrate, the electrode includes a base layer, a first metal layer made of a metal consisting of Al or consisting mainly of Al, and having a given orientation relative to the substrate, a second layer for preventing the first metal layer from migration of Al atoms occurring in vertical to the substrate, and a third layer for adjusting a thickness of the layer. In this SAW filter having an arbitrary layer thickness, the layer hardly causes grain boundary diffusion, and grains of the layer can be made fine for effective resistance to stress. Thus, in this SAW filter, the migration of the Al atoms of the electrode that is associated with the SAW propagation-induced stress imposed on the electrode is inhibited. Accordingly, the filter exhibits excellent resistance against electric power.

摘要翻译： 在包括基板和形成在基板上的电极的表面声波（SAW）滤波器中，电极包括基底层，由Al组成的金属或主要由Al组成的金属构成的第一金属层，并且具有给定的取向相对 向基板施加用于防止第一金属层垂直于基板发生的Al原子迁移的第二层，以及用于调整该层厚度的第三层。 在具有任意层厚度的SAW滤波器中，该层几乎不引起晶界扩散，并且可以使该层的晶粒细微地产生有效的抗应力。 因此，在这种SAW滤波器中，与施加在电极上的SAW传播引起的应力有关的电极的Al原子的迁移被抑制。 因此，过滤器表现出优异的电力抵抗性。

公开(公告)号：US06891449B2

公开(公告)日：2005-05-10

申请号：US10087275

申请日：2002-03-01

申请人： Ryoichi Takayama ,  Tetsuo Kawasaki ,  Yuki Satoh ,  Kozo Murakami ,  Toru Sakuragawa

发明人： Ryoichi Takayama ,  Tetsuo Kawasaki ,  Yuki Satoh ,  Kozo Murakami ,  Toru Sakuragawa

IPC分类号： H01P1/213 ,  H03H7/19 ,  H03H9/145 ,  H03H9/25 ,  H03H9/64 ,  H03H9/72 ,  H04B1/50

CPC分类号： H03H9/6483 ,  H03H7/19

摘要： An antenna duplexer has a power durability to a signal input from an antenna terminal and has stable characteristics. The antenna duplexer includes an input terminal, a transmission filter including a surface acoustic wave (SAW) filter having an input port connected to the input terminal, a phase shifter having an input port connected to an output port of the transmission filter, a reception filter having an input port connected to an output port of the phase shifter, an output terminal connected to the output port of the reception filter, and an antenna terminal connected between the transmission filter and the phase shifter. The transmission filter has a power durability at the output port of the filter, being equal to or larger than a power durability at the input port of the filter.

摘要翻译： 天线双工器具有对从天线端子输入的信号的功率耐久性，并具有稳定的特性。 天线双工器包括输入端子，包括具有连接到输入端子的输入端口的表面声波滤波器的发送滤波器，具有连接到发送滤波器的输出端口的输入端口的移相器，接收滤波器 具有连接到移相器的输出端口的输入端口，连接到接收滤波器的输出端口的输出端子以及连接在发送滤波器和移相器之间的天线端子。 传动过滤器在过滤器的输出端口处具有等于或大于过滤器的输入端口处的功率耐久性的功率耐久性。

公开(公告)号：US06759924B2

公开(公告)日：2004-07-06

申请号：US10049257

申请日：2002-06-14

申请人： Toru Sakuragawa ,  Yuki Satoh ,  Kozo Murakami ,  Ryoichi Takayama

发明人： Toru Sakuragawa ,  Yuki Satoh ,  Kozo Murakami ,  Ryoichi Takayama

IPC分类号： H01L4100

CPC分类号： H03H9/706 ,  H03H9/0571 ,  H03H9/0576 ,  H03H9/72 ,  H03H9/725 ,  H03H2250/00

摘要： A small-sized multi-frequency antenna duplexer using surface acoustic wave filters to be applicable to a plurality of frequencies. This antenna duplexer includes two surface acoustic wave (SAW) filters for transmission and reception having passing bands of mutually different frequencies, a phase shift substrate, and a package for accommodating them. The passing band of each antenna duplexer is mutually different from other's passing band. This multi-frequency antenna duplexer includes a plurality of antenna duplexers. In one package, transmitter surface acoustic wave filters, receiver surface acoustic filters, and phase shift substrates are mounted. Thus, the multi-frequency antenna duplexer are reduced in size.

摘要翻译： 使用表面声波滤波器适用于多个频率的小型多频天线双工器。 该天线双工器包括用于具有相互不同频率的通带的发射和接收的两个表面声波（SAW）滤波器，相移衬底和用于容纳它们的封装。 每个天线双工器的通带与其他通带相互不同。 该多频天线双工器包括多个天线双工器。 在一个封装中，安装了发射器表面声波滤波器，接收器表面声学滤波器和相移衬底。 因此，多频天线双工器的尺寸减小。

公开(公告)号：US06472953B1

公开(公告)日：2002-10-29

申请号：US09523340

申请日：2000-03-10

申请人： Toru Sakuragawa ,  Yuki Sato ,  Katsuya Fujii ,  Kozo Murakami ,  Ryoichi Takayama

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

IPC分类号： H03H972

CPC分类号： H03H9/6483 ,  H03H9/725

摘要： A band switching filter includes a resonator circuit having a surface acoustic wave resonator, a switching element and an impedance element. The filter selectively passes or attenuates a signal through one of two pass bands using a single filter. The resonant frequency of the resonator circuit can be shifted to another frequency by selectively connecting the surface acoustic wave resonator to an impedance element using a switching element.

摘要翻译： 频带切换滤波器包括具有表面声波谐振器，开关元件和阻抗元件的谐振器电路。 滤波器使用单个滤波器选择性地通过两个通带中的一个通过或衰减信号。 通过使用开关元件选择性地将表面声波谐振器连接到阻抗元件，谐振器电路的谐振频率可以移位到另一个频率。

公开(公告)号：US20050062559A1

公开(公告)日：2005-03-24

申请号：US10940577

申请日：2004-09-14

申请人： Koji Seo ,  Tetsuro Shimamura ,  Toru Sakuragawa ,  Hiroshi Kushitani ,  Yuki Satoh

发明人： Koji Seo ,  Tetsuro Shimamura ,  Toru Sakuragawa ,  Hiroshi Kushitani ,  Yuki Satoh

IPC分类号： H03H9/02 ,  H03H9/05 ,  H03H9/10 ,  H03H9/145 ,  H03H9/64

CPC分类号： H03H9/1071 ,  H01L2224/48091 ,  H01L2224/48227 ,  H01L2224/48237 ,  H01L2224/49109 ,  H01L2924/16195 ,  H03H9/02913 ,  H03H9/058 ,  H01L2924/00014

摘要： A surface acoustic wave filter with little electromagnetic coupling between wires and improved attenuation characteristics is provided. This surface acoustic wave filter comprises: a package having a concavity in the shape of stairs made by laminating dielectrics, a surface acoustic wave element provided on the bottom face of the concavity, a plurality of wires for connecting between a plurality of electrodes provided on the surface of the surface acoustic wave element and a plurality of electrodes provided on one same plane portion of the stairs of the package in correspondence to a plurality of electrodes, and a dummy wire provided between the wires.

摘要翻译： 提供了一种具有很少的电线耦合和改进的衰减特性的表面声波滤波器。 该表面声波滤波器包括：具有通过层叠电介质的楼梯形状的凹部的封装，设置在凹部的底面上的表面声波元件，用于连接设置在凹部上的多个电极之间的多根导线 表面声波元件的表面和与多个电极相对应地设置在封装的楼梯的同一平面部分上的多个电极，以及设置在电线之间的虚拟线。

公开(公告)号：US06404302B1

公开(公告)日：2002-06-11

申请号：US09600233

申请日：2000-09-05

申请人： Yuki Satoh ,  Toru Sakuragawa ,  Kozo Murakami

发明人： Yuki Satoh ,  Toru Sakuragawa ,  Kozo Murakami

IPC分类号： H03H964

CPC分类号： H03H9/6483

摘要： The present invention relates to a surface acoustic wave (SAW) filter which is used for cellular phones and other mobile communication equipment. The object of the present invention is to realize a SAW filter of which attenuation characteristics and pass characteristics can be set arbitrarily. The SAW filter of the present invention comprises comb-shaped electrodes facing each other disposed on the same piezoelectric substrate, at least two resonators with an input and output terminals, and an equivalent transmission line which is connected between an output terminal of a first resonator and an input terminal of a second resonator. The phase of the transmission line can be adjusted from 5 degrees to 175 degrees arbitrarily at the series resonance frequency of the resonators. This structure realizes a band-stop filter or a band-pass filter whose attenuation characteristics and pass characteristics can be set arbitrarily.

摘要翻译： 本发明涉及一种用于蜂窝电话和其他移动通信设备的声表面波（SAW）滤波器。 本发明的目的是实现可以任意设定衰减特性和通过特性的SAW滤波器。 本发明的SAW滤波器包括设置在同一压电基片上的彼此相对的梳状电极，至少两个具有输入和输出端子的谐振器和连接在第一谐振器的输出端子和 第二谐振器的输入端。 传输线的相位可以在共振器的串联谐振频率下任意调整为5度至175度。 该结构实现了可以任意设定衰减特性和通过特性的带阻滤波器或带通滤波器。

公开(公告)号：US20060139126A1

公开(公告)日：2006-06-29

申请号：US11357211

申请日：2006-02-21

申请人： Hiroyuki Nakamura ,  Shunichi Seki ,  Kazunori Nishimura ,  Toru Sakuragawa

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

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 formed on a piezoelectric substrate and reflector electrodes disposed on both sides of the IDT electrode. The IDT electrode includes first finger-electrodes, second finger-electrodes and strip-line electrodes. 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：US06714098B2

公开(公告)日：2004-03-30

申请号：US09914263

申请日：2001-10-19

申请人： Kazushi Nishida ,  Katsuya Fujii ,  Ichiro Kameyama ,  Toru Sakuragawa ,  Hiroshi Fujinaka

发明人： Kazushi Nishida ,  Katsuya Fujii ,  Ichiro Kameyama ,  Toru Sakuragawa ,  Hiroshi Fujinaka

IPC分类号： H03H972

CPC分类号： H04B1/52 ,  H03H9/0576 ,  H03H9/72 ,  H03H9/725

摘要： An antenna duplexer capable of optimally decreasing the insertion loss and the voltage standing wave ratio (VSWR) at a center frequency and its vicinity in the pass band in transmitter-band of the device. The output port of transmitter surface-acoustic-wave (SAW) filter (11) is electrically connected with phase shift circuit (13), to which receiver SAW filter (12) is also electrically connected. The transmitter and receiver SAW filters have different pass bands and attenuate the other pass band with each other. Phase shift circuit (13) shifts the phase of receiver SAW filter (12) in the transmitter-band. In addition, phase shift circuit (13) has the characteristic impedance in which the magnitude of the reflection coefficient at the center frequency in the transmitter-band of receiver SAW filter (12) is to be not less than 0.8 and the phase angle of reflection coefficient at the center frequency in the transmitter-band of receiver SAW filter (12) takes the range from 0° to 45°.

摘要翻译： 一种天线双工器，其能够最佳地降低设备的发射机频带中的中心频率及其附近的插入损耗和电压驻波比（VSWR）。 发射器表面声波（SAW）滤波器（11）的输出端口与相移电路（13）电连接，接收器SAW滤波器（12）也电连接到该相移电路。 发射器和接收器SAW滤波器具有不同的通带，并使另一个通带衰减。 相移电路（13）使接收器SAW滤波器（12）的相位在发射机频带中移位。 此外，相移电路（13）具有特征阻抗，其中接收机SAW滤波器（12）的发射机频带中的中心频率处的反射系数的大小不得小于0.8，反射相位角 接收机SAW滤波器（12）的发射机频带中心频率处的系数取0°至45°的范围。

公开(公告)号：US07138890B2

公开(公告)日：2006-11-21

申请号：US11357211

申请日：2006-02-21

申请人： Hiroyuki Nakamura ,  Shunichi Seki ,  Kazunori Nishimura ,  Toru Sakuragawa

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

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 formed on a piezoelectric substrate and reflector electrodes disposed on both sides of the IDT electrode. The IDT electrode includes first finger-electrodes, second finger-electrodes and strip-line electrodes. 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谐振器包括形成在压电基板上的IDT电极和设置在IDT电极两侧的反射器电极。 IDT电极包括第一指状电极，第二指状电极和带状线电极。 第一和第二指状电极彼此不重叠，而是通过带状线电极声耦合在一起。 通过带状线电极的这种声耦合消除了对公共母线电极的需要，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：US07034634B2

公开(公告)日：2006-04-25

申请号：US10809427

申请日：2004-03-26

申请人： Hiroyuki Nakamura ,  Shunichi Seki ,  Kazunori Nishimura ,  Toru Sakuragawa

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

IPC分类号： H03H9/64 ,  H03H9/72

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

摘要： A SAW resonator includes an IDT electrode formed on a piezoelectric substrate and reflector electrodes disposed on both sides of the IDT electrode. The IDT electrode includes first finger-electrodes, second finger-electrodes and strip-line electrodes. 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谐振器包括形成在压电基板上的IDT电极和设置在IDT电极两侧的反射器电极。 IDT电极包括第一指状电极，第二指状电极和带状线电极。 第一和第二指状电极彼此不重叠，而是通过带状线电极声耦合在一起。 通过带状线电极的这种声耦合消除了对公共母线电极的需要，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。