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公开(公告)号：EP0269064B1
公开(公告)日：1996-07-17
申请号：EP87117300.1
申请日：1987-11-24
CPC分类号： H03H9/6479 , H03H9/02755 , H03H9/14597 , H03H9/6443 , H03H9/6463
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公开(公告)号：EP0269064A3
公开(公告)日：1989-08-23
申请号：EP87117300.1
申请日：1987-11-24
CPC分类号： H03H9/6479 , H03H9/02755 , H03H9/14597 , H03H9/6443 , H03H9/6463
摘要： This invention relates to the structure of a band-pass or band-rejection filter by combining a plurality of one-port surface acoustic wave resonators (421 to 433 or Q₁ to Q₄) whose interdigital electrode fingers are disposed on a piezoelectric substrate (10). The filter combining surface acoustic wave resonators of the present invention consists of a series circuit of the one-port surface acoustic wave resonators (421 to 433 or 70 to 72) disposed on a piezoelectric substrate (10) for transmitting elastic surface wave and a plurality of circuit elements containing capacitance elements (431 to 433 or 70 to 72), and one-port surface acoustic wave resonators (421 to 433 or 70 to 72) disposed between the electrodes of the plurality of circuit elements and the common ground. This structure can accomplish a filter having a low loss, high power handling capability and high design freedom of rejection-and passing-band.
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3.发明公开Filter combining surface acoustic wave resonators 失效过氧化物酶（AkustischeOberflächenwellenresonatorenkombinierendes）过滤器。
公开(公告)号：EP0269064A2
公开(公告)日：1988-06-01
申请号：EP87117300.1
申请日：1987-11-24
CPC分类号： H03H9/6479 , H03H9/02755 , H03H9/14597 , H03H9/6443 , H03H9/6463
摘要： This invention relates to the structure of a band-pass or band-rejection filter by combining a plurality of one-port surface acoustic wave resonators (421 to 433 or Q₁ to Q₄) whose interdigital electrode fingers are disposed on a piezoelectric substrate (10). The filter combining surface acoustic wave resonators of the present invention consists of a series circuit of the one-port surface acoustic wave resonators (421 to 433 or 70 to 72) disposed on a piezoelectric substrate (10) for transmitting elastic surface wave and a plurality of circuit elements containing capacitance elements (431 to 433 or 70 to 72), and one-port surface acoustic wave resonators (421 to 433 or 70 to 72) disposed between the electrodes of the plurality of circuit elements and the common ground. This structure can accomplish a filter having a low loss, high power handling capability and high design freedom of rejection-and passing-band.
摘要翻译： 本发明涉及通过将交叉指状电极指配置在压电基板（10）上的多个单端口声表面波谐振器（421至433或Q1至Q4）组合而成的带通滤波器或带阻滤波器的结构， 。 本发明的组合弹性表面波谐振器的滤波器由布置在用于传播弹性表面波的压电基片（10）上的单孔表面声波谐振器（421至433或70至72）的串联电路和多个 包括电容元件（431至433或70至72）的电路元件和设置在多个电路元件的电极和公共地之间的单端口声表面波谐振器（421至433或70至72）。 该结构可以实现具有低损耗，高功率处理能力和高排斥和通带的设计自由度的滤波器。
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公开(公告)号：EP0387679A2
公开(公告)日：1990-09-19
申请号：EP90104326.5
申请日：1990-03-07
申请人： HITACHI, LTD.
发明人： Kurosawa, Kazuhito , Hikita, Mitsutaka , Tabuchi, Toyoji , Shibagaki, Nobuhiko, c/o Hitachi D.Kyoushinryou , Hirashima, Tetsuya
CPC分类号： H03H9/6426 , H03H9/02748 , H03H9/1455
摘要： At least one of electro-acoustic transducers (4) of a first surface acoustic wave device (A) and acousto-electric transducers (6) of a second surface acoustic wave device (B) arranged symmetrically to the first surface acoustic wave device about a line (C) parallel to a propagating direction of surface acoustic wave is phase-weighted differently from the remaining transducers having common phase-weighting, to improve an attenuation for stop frequency.
摘要翻译： 第一声表面波装置（A）的电声换能器（4）和第二声表面波装置（B）的声电换能器（6）中的至少一个绕第一声表面波装置 与表面声波的传播方向平行的线（C）与具有公共相位加权的剩余换能器不同地相位加权，以改善停止频率的衰减。
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公开(公告)号：EP0422637B1
公开(公告)日：1996-06-19
申请号：EP90119492.8
申请日：1990-10-11
申请人： HITACHI, LTD.
CPC分类号： H03H9/1455 , H03H9/6426 , H03H9/6483
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公开(公告)号：EP0399537A3
公开(公告)日：1991-05-02
申请号：EP90109920.0
申请日：1990-05-25
申请人： HITACHI, LTD.
发明人： Hikita, Mitsutaka , Tabuchi, Toyoji , Shibagaki, Nobuhiko , Isobe, Atsushi , Kurosawa, Kazuhito
IPC分类号： H03H9/145
CPC分类号： H03H9/14502
摘要： A surface acoustic wave device comprises a piezoelectric substrate (1) and a plurality of electrode fingers (2, 3, 4, 6, 7, 8) which are located on the piezoelectric substrate along the propagation direction of a surface acoustic wave (10). The electrode fingers are located on the piezoelectric substrate at a pitch of about 1.5λo/2,λo indicating a wavelength of a surface acoustic wave with a frequency equivalent to the center frequency of the surface acoustic wave device. The width of each of the electrode fingers is about 1.5λo/4. Every other electrode finger (3) on the substrate is electrically independent of an external circuit (5, 9). Since the width of electrode fingers is about 1,5λo/4, the surface acoustic wave device can be produced without a very fine processing technic.
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公开(公告)号：EP0399537A2
公开(公告)日：1990-11-28
申请号：EP90109920.0
申请日：1990-05-25
申请人： HITACHI, LTD.
发明人： Hikita, Mitsutaka , Tabuchi, Toyoji , Shibagaki, Nobuhiko , Isobe, Atsushi , Kurosawa, Kazuhito
IPC分类号： H03H9/145
CPC分类号： H03H9/14502
摘要： A surface acoustic wave device comprises a piezoelectric substrate (1) and a plurality of electrode fingers (2, 3, 4, 6, 7, 8) which are located on the piezoelectric substrate along the propagation direction of a surface acoustic wave (10). The electrode fingers are located on the piezoelectric substrate at a pitch of about 1.5λo/2,λo indicating a wavelength of a surface acoustic wave with a frequency equivalent to the center frequency of the surface acoustic wave device. The width of each of the electrode fingers is about 1.5λo/4. Every other electrode finger (3) on the substrate is electrically independent of an external circuit (5, 9).
Since the width of electrode fingers is about 1,5λo/4, the surface acoustic wave device can be produced without a very fine processing technic.摘要翻译： 本发明提供一种弹性表面波元件，其特征在于，具备压电基板（1）和沿着弹性表面波（10）的传播方向位于压电基板上的多个电极指（2,3,4,6,7,8） 。 电极指以大约1.5λo/ 2的间距位于压电基片上，λo表示具有与弹性表面波装置的中心频率相等的频率的表面声波的波长。 每个电极指的宽度约为1.5λo/ 4。 基板上的每个其他电极指（3）与外部电路（5,9）电独立。 由于电极指的宽度大约为1.5λo/ 4，因此可以在没有非常精细的处理技术的情况下生产表面声波装置。
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公开(公告)号：EP0387679A3
公开(公告)日：1991-03-20
申请号：EP90104326.5
申请日：1990-03-07
申请人： HITACHI, LTD.
发明人： Kurosawa, Kazuhito , Hikita, Mitsutaka , Tabuchi, Toyoji , Shibagaki, Nobuhiko, c/o Hitachi D.Kyoushinryou , Hirashima, Tetsuya
CPC分类号： H03H9/6426 , H03H9/02748 , H03H9/1455
摘要： At least one of electro-acoustic transducers (4) of a first surface acoustic wave device (A) and acousto-electric transducers (6) of a second surface acoustic wave device (B) arranged symmetrically to the first surface acoustic wave device about a line (C) parallel to a propagating direction of surface acoustic wave is phase-weighted differently from the remaining transducers having common phase-weighting, to improve an attenuation for stop frequency.
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公开(公告)号：EP0337703A3
公开(公告)日：1990-09-05
申请号：EP89303519.6
申请日：1989-04-10
申请人： HITACHI, LTD.
IPC分类号： H03H9/64
CPC分类号： H03H9/6483 , H03H9/02755 , H03H9/02921 , H03H9/6463 , H03H9/6479
摘要： Disclosed is a SAW filter employing a SAW resonator which is constructed of a plurality of pairs of electrode fingers formed on a piezoelectric substrate, and in which a plurality of SAW transmission spaces are included. The SAW transmission spaces do not have the function of exciting a SAW, and they have electric lengths which match the phases of SAWs excited by the resonator. In accordance with frequency characteristics required of the filter, such SAW transmission spaces are introduced into, for example, one of a plurality of SAW resonators located on the electric power input side of the filter.
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公开(公告)号：EP0337703A2
公开(公告)日：1989-10-18
申请号：EP89303519.6
申请日：1989-04-10
申请人： HITACHI, LTD.
IPC分类号： H03H9/64
CPC分类号： H03H9/6483 , H03H9/02755 , H03H9/02921 , H03H9/6463 , H03H9/6479
摘要： Disclosed is a SAW filter employing a SAW resonator which is constructed of a plurality of pairs of electrode fingers formed on a piezoelectric substrate, and in which a plurality of SAW transmission spaces are included. The SAW transmission spaces do not have the function of exciting a SAW, and they have electric lengths which match the phases of SAWs excited by the resonator. In accordance with frequency characteristics required of the filter, such SAW transmission spaces are introduced into, for example, one of a plurality of SAW resonators located on the electric power input side of the filter.
摘要翻译： 公开了一种使用形成在压电基板（7）上的多对电极指构成的SAW谐振器的SAW滤波器，其中包括多个SAW传输空间。 SAW传输空间不具有激发SAW的功能，并且它们具有与由谐振器激发的SAW的相位匹配的电长度。 根据滤波器所需的频率特性，将SAW传输空间引入到例如位于滤波器的电力输入侧（1,1'）上的多个SAW谐振器中的一个。
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