公开(公告)号：US4296391A

公开(公告)日：1981-10-20

申请号：US954124

申请日：1978-10-24

Applicant: Katashi Hazama ,  Akitsuna Yuhara

Inventor： Katashi Hazama ,  Akitsuna Yuhara

IPC: H03H9/145 ,  H03H9/64 ,  H03H9/72 ,  H03J5/24 ,  H03H9/68

CPC classification number: H03H9/6413 ,  H03H9/1455 ,  H03H9/72 ,  H03J5/24 ,  H03H9/6436 ,  H03H9/6453

Abstract: A surface-acoustic-wave filter for a channel selection tuning system of a television receiver includes at least two comb filter elements, each of which comprises an input transducer provided on a piezoelectric substrate and adapted to convert an input electrical signal into an elastic surface wave, and first and second output transducers disposed on the substrate for receiving the elastic surface wave propagating in the same direction from the input transducer. The first and second output transducers are positioned from the input transducer with different distances. The transducers of the two comb filter elements are so designed that the respective comb filter elements respond to frequencies of different program channel bands over for example VHF and UHF bands. The distances of the first and the second output transducers from the input transducer in the wave propagating direction are so predetermined that reciprocal of the difference in delay time between the electrical signals derived from the first and second output transducers is equal to a divisor of an interchannel frequency difference in the corresponding channel band.

Abstract translation: 一种用于电视接收机的频道选择调谐系统的表面声波滤波器包括至少两个梳状滤波器元件，每个梳状滤波器元件包括设置在压电基片上的输入换能器，其适于将输入电信号转换成弹性表面波 以及设置在基板上的第一和第二输出换能器，用于接收从输入换能器沿相同方向传播的弹性表面波。 第一和第二输出换能器从不同距离的输入换能器定位。 两个梳状滤波器元件的换能器被设计成使得相应的梳状滤波器元件响应于例如VHF和UHF频带的不同节目频道频带的频率。 第一和第二输出换能器与输入换能器在波传播方向上的距离是如此预定的，即从第一和第二输出换能器得到的电信号之间的延迟时间差的倒数等于通道间的除数 相应频道频段的频差。

公开(公告)号：US4427515A

公开(公告)日：1984-01-24

申请号：US256960

申请日：1981-04-23

Applicant: Akitsuna Yuhara ,  Shinya Iida ,  Hideo Abe ,  Kiyoharu Kishimoto ,  Katashi Hazama

Inventor： Akitsuna Yuhara ,  Shinya Iida ,  Hideo Abe ,  Kiyoharu Kishimoto ,  Katashi Hazama

IPC: H03H3/08 ,  H03H9/145 ,  C23C15/00

CPC classification number: H03H3/08

Abstract: A surface acoustic wave device, a method for manufacturing the same and a manufacturing equipment therefor are disclosed. In the surface acoustic wave device having functional elements such as input and output interdigital electrodes of Al, Al-Si alloy or Al-Cu-Si alloy thin film strips and a grating type reflector, arranged on a piezoelectric substrate and any other bus conductors arranged on the same substrate, at least a portion of the functional elements and the bus conductors having a high frequency metal strip having a line width of no more than 2 .mu.m, at least the metal strip having the width of no more than 2 .mu.m has a film thickness of no less than 0.25 .mu.m at least a portion thereof but no more than an upper limit of an effective film thickness determined by a required characteristic of the surface acoustic wave device, whereby a transfer characteristic of the surface acoustic wave device is compensated and controlled, for example, a reflection efficiency of a grating type reflector is improved or a loss due to a D.C. resistance of the input and output electrodes is reduced.

Abstract translation: 公开了一种声表面波装置及其制造方法及其制造装置。 在具有诸如Al，Al-Si合金或Al-Cu-Si合金薄膜条的输入和输出叉指电极等功能元件的表面声波装置和布置在压电基板上的任何其它总线导体布置的光栅型反射器 在相同的基板上，功能元件和总线导体的至少一部分具有线宽不大于2μm的高频金属条，至少宽度不大于2μm的金属条 具有至少一部分的膜厚不小于0.25μm，但不超过由声表面波装置的要求特性确定的有效膜厚度的上限，由此表面声波装置的传递特性 被补偿和控制，例如，光栅型反射器的反射效率提高或由于输入和输出电极的直流电阻的损耗减小。

公开(公告)号：US4390807A

公开(公告)日：1983-06-28

申请号：US337718

申请日：1982-01-07

Applicant: Kiyoharu Kishimoto ,  Katashi Hazama ,  Akitsuna Yuhara

Inventor： Kiyoharu Kishimoto ,  Katashi Hazama ,  Akitsuna Yuhara

IPC: H03H3/08 ,  H03H9/02 ,  H03H9/145 ,  H03H9/64 ,  H01L41/08

CPC classification number: H03H9/1455 ,  H03H9/02874 ,  H03H9/145 ,  H03H9/6426

Abstract: In a preferred embodiment, a surface acoustic wave device comprises a piezoelectric substrate, a first electrode formed on the substrate and acting to convert an electrical signal into a surface acoustic wave, and second and third electrodes formed on the substrate and acting to convert the surface acoustic wave into an electrical signal. The second and third electrodes are disposed at different distances from the first electrode and connected electrically with each other. Electrode fingers of the second electrode are arranged in a relationship of the opposite polarity with respect to those of the third electrode so as to cause peaks in the constant frequency interval multi-peak frequency characteristics of the device acting as a filter to take place at frequencies which are (integer+1/2) times the constant frequency interval .DELTA.f. In another preferred embodiment, a plurality of surface acoustic wave device units are formed on a common piezoelectric substrate. Respective units include a set of first, second and third electrodes and operate at different frequency bands which partly overlap. The distance between the first electrode and the second electrode or the third electrode is determined in the respective units such that the delay time due to the propagation of the surface acoustic wave between the input and output electrodes is equal in the respective units and the output voltage of the output electrode is in phase in the respective units, thereby providing accurate peak frequencies over the whole frequency band at which the surface acoustic wave device operates.

Abstract translation: 在优选实施例中，表面声波装置包括压电基片，形成在基片上并用于将电信号转换为表面声波的第一电极，以及形成在基片上的第二和第三电极， 声波变成电信号。 第二和第三电极设置在与第一电极不同的距离处并且彼此电连接。 第二电极的电极指状物以与第三电极相反的极性的关系布置，从而在作为滤波器的装置的频率的恒定频率间隔多峰值频率特性中产生峰值 它们是恒定频率间隔DELTA f的（整数+ 1/2）倍。 在另一个优选实施例中，在公共压电基片上形成多个声表面波器件单元。 各个单元包括一组第一，第二和第三电极，并且在部分重叠的不同频带上操作。 在各单元中确定第一电极和第二电极或第三电极之间的距离，使得由于输入和输出电极之间的表面声波的传播引起的延迟时间在各单元中相等，并且输出电压 输出电极在相应的单元中同相，从而在声表面波器件工作的整个频带上提供精确的峰值频率。

公开(公告)号：US07274729B2

公开(公告)日：2007-09-25

申请号：US10730003

申请日：2003-12-09

Applicant: Takashi Shiba ,  Akitsuna Yuhara ,  Yoshihiro Yamada ,  Yasuhiro Ohta

Inventor： Takashi Shiba ,  Akitsuna Yuhara ,  Yoshihiro Yamada ,  Yasuhiro Ohta

IPC: H04B1/707

CPC classification number: H04J13/00 ,  H04B1/70712 ,  H04J13/0022

Abstract: A structure of a spectrum spreading communication device which solves the problem with the conventional spectrum spreading communication using Barker codes, etc., and limits the rise of the side-lobe of a correctional signal independently of the order of information codes by use of a code sequence having a code length of at least 14. The spectrum spreading communication device uses a pseudo-noise code having code length of at least 14 and a self-correlation side-lobe of not greater than 3 as a pseudo-noise code of a direct spreading communication device which uses the pseudo-noise codes whose polarities are inverted so as to deal with also digital information. Thus, even when the pseudo-noise code length is 14 or more, the side-lobe of the correction coefficient can be restricted. Accordingly, the error rate of the spectrum spreading communication device is reduced and the processing gain is improved.

Abstract translation: 频谱扩展通信装置的结构，其解决了使用巴克码等的常规频谱扩展通信的问题，并且通过使用代码来独立于信息码的顺序来限制校正信号的旁瓣的上升 码长至少为14的序列。频谱扩展通信装置使用具有至少14的码长和不大于3的自相关旁瓣的伪噪声码作为直接的伪噪声码 扩展通信装置，其使用极性反转的伪噪声码，以处理数字信息。 因此，即使伪噪声码长度为14以上，也可以限制校正系数的旁瓣。 因此，频谱扩展通信装置的误码率降低，处理增益提高。

公开(公告)号：US5144185A

公开(公告)日：1992-09-01

申请号：US549643

申请日：1990-07-09

Applicant: Akitsuna Yuhara ,  Jun Sasaki ,  Hiromi Isomae ,  Shozi Kawakubo ,  Jun Yamada

Inventor： Akitsuna Yuhara ,  Jun Sasaki ,  Hiromi Isomae ,  Shozi Kawakubo ,  Jun Yamada

IPC: H03H3/08 ,  H03H9/145

CPC classification number: H03H3/08 ,  H03H9/145

Abstract: A SAW device having a piezoelectric substrate and interleaved metal electrodes formed on the substrate, in which the formation of the electrodes on the substrate is carried out by sputtering. Further, the metal electrodes may contain an additive of Cu, Ti, Zn, Mg, Fe, Ni, Cr, Ga, Ge, Sn, Pd or Ta. The resulting SAW device is capable of dealing with high frequency electric signals of a larger amplitude, or higher power electric signals, as compared with the conventional SAW device.

Abstract translation: 具有压电基板和形成在基板上的交错金属电极的SAW器件，其中基板上的电极的形成通过溅射进行。 此外，金属电极可以含有Cu，Ti，Zn，Mg，Fe，Ni，Cr，Ga，Ge，Sn，Pd或Ta的添加剂。 与传统的SAW器件相比，所产生的SAW器件能够处理更大振幅或更高功率电信号的高频电信号。

公开(公告)号：US4775814A

公开(公告)日：1988-10-04

申请号：US051523

申请日：1987-05-19

Applicant: Akitsuna Yuhara ,  Jun Sasaki ,  Tetsuya Hirashima ,  Jun Yamada

Inventor： Akitsuna Yuhara ,  Jun Sasaki ,  Tetsuya Hirashima ,  Jun Yamada

IPC: H03H3/08 ,  H03H9/02 ,  H03H9/145 ,  H01L41/08

CPC classification number: H03H3/08 ,  H03H9/02929 ,  H03H9/14541

Abstract: In a SAW device comprising a piezoelectric substrate and at least one set of metallic electrodes formed on the piezoelectric substrate, at least one set of the electrodes have a laminated structure comprised of a layer of an aluminum film added with an impurity at a concentration of 6 wt. % or less and another layer of a film of pure aluminum or aluminum added with an impurity at a concentration of 0.4 wt. % or less. The SAW device having the laminated structure of electrodes can handle high frequency electric signals of higher power and/or larger amplitudes.

Abstract translation: 在包括压电基板和形成在压电基板上的至少一组金属电极的SAW器件中，至少一组电极具有层叠结构，该叠层结构由添加有浓度为6的杂质的铝膜层 重量 ％以下的另一层，添加浓度为0.4重量％的杂质的纯铝或铝的另一层。 ％ 或更少。 具有电极层叠结构的SAW器件可以处理更高功率和/或更大幅度的高频电信号。

公开(公告)号：US4630112A

公开(公告)日：1986-12-16

申请号：US553237

申请日：1983-11-18

Applicant: Jun Yamada ,  Takeshi Murakami ,  Akitsuna Yuhara ,  Norio Hosaka ,  Yuji Fujita

Inventor： Jun Yamada ,  Takeshi Murakami ,  Akitsuna Yuhara ,  Norio Hosaka ,  Yuji Fujita

IPC: H04N7/167 ,  H04N7/171 ,  H04N7/16 ,  H04K1/00

CPC classification number: H04N7/1675 ,  H04N7/1713

Abstract: In an apparatus for descrambling a scrambled television signal, an elastic surface wave filter is used. This elastic surface wave filter has an interdigital electrode having an electrode pattern similar to at least portion of the waveforms of a luminance signal section of the scrambled television signal to be input. The elastic surface wave filter generates a response pulse only when the waveforms which are analogous to the electrode pattern of the interdigital electrode of the scrambled television signal were input, thereby descrambling the television signal using this response pulse.

Abstract translation: 在对加扰电视信号进行解扰的装置中，使用弹性面波滤波器。 该弹性表面波滤波器具有交叉指状电极，其具有与要输入的加扰电视信号的亮度信号部分的波形的至少一部分类似的电极图案。 弹性表面波滤波器仅在与加扰电视信号的叉指电极的电极图案类似的波形被输入时产生响应脉冲，从而使用该响应脉冲来解扰电视信号。

公开(公告)号：US4939487A

公开(公告)日：1990-07-03

申请号：US219250

申请日：1988-07-15

Applicant: Akitsuna Yuhara ,  Hitoshi Watanabe ,  Jun Yamada ,  Tetsuya Hirashima

Inventor： Akitsuna Yuhara ,  Hitoshi Watanabe ,  Jun Yamada ,  Tetsuya Hirashima

IPC: H03H3/08 ,  H03H9/145 ,  H03H9/64

CPC classification number: H03H9/6426 ,  H03H9/1455

Abstract: When SAW filter is used as a receiving filter of an antenna duplexer filter in a cellular radio equipment, since a transmitting signal of an out-band frequency has a large power for the SAW filter, the large power can leak into the SAW filter to generate inter-modulation disturbances in the SAW filter. Since the inter-modulation disturbances are generated when the transmission power density of the surface acoustic wave is made too large, input converters are divided, and the divided converters are disposed in the direction perpendicular to the propagation direction of the surface acoustic wave to lower the transmission power density. Since the divided converters are connected in series, reduction in the impedence together with increase of the aperture length can be compensated.

Abstract translation: 当在蜂窝无线电设备中使用SAW滤波器作为天线双工器滤波器的接收滤波器时，由于带外频率的发射信号对SAW滤波器具有较大的功率，因此大功率可能泄漏到SAW滤波器中以产生 SAW滤波器中的互调扰动。 由于当声表面波的发射功率密度变得太大时产生互调扰乱，所以输入转换器被分割，并且分离的转换器被设置在与声表面波的传播方向垂直的方向上，以降低 传输功率密度。 由于分频转换器串联连接，可以补偿阻抗的减小以及孔径长度的增加。

公开(公告)号：US4689586A

公开(公告)日：1987-08-25

申请号：US869979

申请日：1986-06-02

Applicant: Jun Yamada ,  Akitsuna Yuhara ,  Takashi Shiba ,  Yuji Fujita

Inventor： Jun Yamada ,  Akitsuna Yuhara ,  Takashi Shiba ,  Yuji Fujita

IPC: H03H9/02 ,  H03H9/145 ,  H03H9/42

CPC classification number: H03H9/14505

Abstract: A surface acoustic wave (SAW) device comprises a piezo-electric surface acoustic substrate, and plural sets of input/output interdigital electrodes disposed on the substrate. A phase shifter is provided between a sending electrode and a reflecting electrode included in the input or output interdigital electrodes for producing an electrical phase difference to implement a unidirectional electrode. The sending electrode and the reflecting electrode are mutually connected through the phase shifter including two pure reactance elements serially connected between the sending and the reflecting electrodes and a pure reactance element connected to the junction between the two serially connected reactance elements so as to form a T-circuit. When the two serially connected pure reactance elements are selected equal to each other, the operating frequency band is broadened. The phase shifter includes no ohmic resistance and thus is lossless.

Abstract translation: 表面声波（SAW）器件包括压电表面声学衬底和设置在衬底上的多组输入/输出叉指电极。 在发送电极和包括在输入或输出叉指电极中的反射电极之间提供移相器，用于产生电相差以实现单向电极。 发送电极和反射电极通过移相器相互连接，该移相器包括串联连接在发送电极和反射电极之间的两个纯电抗元件和连接到两个串联的电抗元件之间的接点的纯电抗元件，从而形成T 电路 当选择两个串联的纯电抗元件彼此相等时，工作频带变宽。 移相器不包含欧姆电阻，因此无损耗。

公开(公告)号：US4510410A

公开(公告)日：1985-04-09

申请号：US507463

申请日：1983-06-24

Applicant: Akitsuna Yuhara ,  Kazuo Nate ,  Tatsuro Toyama ,  Jun Yamada

Inventor： Akitsuna Yuhara ,  Kazuo Nate ,  Tatsuro Toyama ,  Jun Yamada

IPC: H03H9/25 ,  G10K11/36 ,  H03H3/08 ,  H03H9/02

CPC classification number: H03H9/02842 ,  G10K11/36

Abstract: An elastic surface wave device that has good frequency characteristics and no unwanted signals, and is highly suited for mass production, comprising a piezoelectric substrate, at least one pair of transmitting and receiving electrodes on the surface of said substrate, and elastic surface wave absorbers formed by curing a composition, the main component of which is a resin curable by ultraviolet radiation, disposed on at least part of the zone on said piezoelectric substrate that propagates unwanted elastic surface waves.

Abstract translation: 一种弹性表面波装置，其具有良好的频率特性，并且不需要不需要的信号，并且非常适合批量生产，包括压电基板，在所述基板的表面上的至少一对发送和接收电极以及形成的弹性表面波吸收体 通过固化其主要成分是通过紫外线辐射固化的树脂的组合物，其被设置在所述压电基板上的至少部分传播不需要的弹性表面波的区域上。