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    • 4. 发明公开
    • 표면탄성파 필터
    • 表面声波滤波器
    • KR1020030064533A
    • 2003-08-02
    • KR1020020004861
    • 2002-01-28
    • 엘지이노텍 주식회사
    • 이만형
    • H03H9/64
    • H03H9/64H03H9/1092H03H9/25H03H9/6473
    • PURPOSE: A surface acoustic wave filter is provided, which reduces layout of the whole device without using an additional device to convert an output signal from an unbalance type surface acoustic wave filter into a balance signal. CONSTITUTION: According to the surface acoustic wave filter, an unbalance filter part(20) outputs a signal having a relative amplitude based on a ground when a signal being inputted from the external is filtered and output. And a balance filter part(30) enables to divide an amplitude of a signal being output from the unbalance filter part and thus outputs a signal having a phase inverse to the output signal from the unbalance filter part.
    • 目的:提供一种表面声波滤波器,可以减少整个装置的布局,而无需使用附加装置将不平衡型表面声波滤波器的输出信号转换成平衡信号。 构成:根据表面声波滤波器,当从外部输入的信号被滤波并输出时,不平衡滤波器部分(20)输出具有基于地的相对幅度的信号。 并且平衡滤波器部分(30)能够分割从不平衡滤波器部分输出的信号的幅度,从而输出具有与来自不平衡滤波器部分的输出信号相位相反的信号。
    • 6. 发明公开
    • 밸런스형 탄성 표면파 필터
    • 平衡型表面声波滤波器
    • KR1020070045320A
    • 2007-05-02
    • KR1020077005893
    • 2005-03-08
    • 가부시키가이샤 무라타 세이사쿠쇼
    • 타카미네유이치
    • H03H9/64H03H9/145
    • H03H9/0061H03H9/0057H03H9/14582H03H9/14588H03H9/6473
    • 본 발명은 통과대역 내의 삽입손실 및 VSWR 특성이 우수하고, 또한 대형화를 초래하지 않으며, 불평형 신호단자측의 임피던스와 평형 신호단자측의 임피던스의 비를 용이하게 1:2로 설정하는 것이 가능한 밸런스형 탄성 표면파 필터를 제공하는 것을 목적으로 한다.
      본 발명에 따른 밸런스형 탄성 표면파 필터(1)는, 불평형 신호단자(31)에 접속된 제1의 종결합 공진자형 탄성 표면파 필터부(11)와, 제1, 제2의 평형 신호단자(32, 33)에 접속된 제2의 종결합 공진자형 탄성 표면파 필터부(21)가 2단 종속(縱續; cascade) 접속되어 있으며, 제1의 종결합 공진자형 탄성 표면파 필터부(11)의 중앙의 제2의 IDT(13)의 협피치 전극지부의 전극지의 개수를 N1, 제2의 종결합 공진자형 탄성 표면파 필터부(21)의 중앙의 제5의 IDT(23)의 협피치 전극지부의 전극지의 개수를 N2로 했을 때, N1>N2로 되어 있다.
      탄성 표면파 필터, 압전기판, IDT, 협피치 전극지부
    • 本发明具有优异的在通带中的插入损耗和VSWR特性,并且也不会导致大的尺寸,所述不平衡信号端子侧的阻抗和促进中的一个的平衡信号端子侧的阻抗之比:能够均衡设置为2 本发明的目的是提供一种表面声波滤波器。
    • 7. 发明公开
    • 밸런스형 탄성표면파 필터
    • 平衡型表面声波滤波器
    • KR1020060080221A
    • 2006-07-07
    • KR1020067006621
    • 2005-09-08
    • 가부시키가이샤 무라타 세이사쿠쇼
    • 타니마사카즈
    • H03H9/64H03H9/145
    • H03H9/0061H03H9/14517H03H9/1452H03H9/14532H03H9/14582H03H9/6473H03H9/6496
    • In a balance type elastic surface-wave filter including first and second elastic surface-wave filter unit having a balance/non-balance conversion function connected laterally in two stages, it is possible to improve the amplitude balance degree and the phase balance degree in the passing band. The balance type elastic surface-wave filter (1) includes a first laterally connected resonator type elastic surface-wave filter unit (11) connected to a non-balance input terminal (33) and a second laterally connected resonator type elastic surface-wave filter unit (21) connected to a first and a second balance output terminal (34, 35) which are connected laterally to each other in two stages. In the first laterally connected resonator type elastic surface-wave filter unit (11), among the portion where the first and the second IDT (12, 13) are adjacent to each other and the portion where the second and the third IDT (13, 14) are adjacent to each other, electrode fingers (14a, 14b) including the outermost electrode finger (14a) nearest to one and/or the other of the adjacent IDT (13, 14) are weighted.
    • 在包括具有两级横向连接的平衡/非平衡转换功能的第一和第二弹性表面波滤波器单元的平衡型弹性表面波滤波器中,可以提高振幅平衡度和相位平衡度 通过乐队。 平衡型弹性表面波滤波器(1)包括连接到非平衡输入端子(33)的第一横向连接的谐振器型弹性表面波滤波器单元(11)和第二横向连接的谐振器型弹性表面波滤波器 连接到第一和第二平衡输出端子(34,35)的单元(21),它们分两个横向地相互连接。 在第一横向连接的谐振器型弹性表面波滤波器单元(11)中,在第一和第二IDT(12,13)彼此相邻的部分和第二和第三IDT(13, 14)彼此相邻,包括最靠近相邻IDT(13,14)中的一个和/或另一个的最外面的电极指(14a)的电极指(14a,14b)被加权。
    • 8. 发明授权
    • 탄성 표면파 장치
    • 탄성표면파장치
    • KR100434411B1
    • 2004-06-04
    • KR1020010012230
    • 2001-03-09
    • 가부시키가이샤 무라타 세이사쿠쇼
    • 다카미네유이치
    • H03H9/64
    • H03H9/6423H03H9/0028H03H9/6436H03H9/6473H03H9/6476H03H2250/00
    • A surface acoustic wave device includes a first surface acoustic wave filter (1) connected between an input terminal (3) and an output terminal (4), a second surface acoustic wave filter (2) having a different center frequency from that of the first surface acoustic wave filter (1), and which is connected between the input terminal (3) and the output terminal (4) and in parallel with the first surface acoustic wave filter, and at least one one-port surface acoustic wave resonator (5,6,9) connected in series with the first or second surface acoustic wave filter (1,2), on at least one side between the input terminal (3) and at least one of the first and second surface acoustic wave filters (1,2), or between the output terminal (4) and at least one of the first and second surface acoustic wave filters (1,2). The anti-resonance frequency of the one one-port surface acoustic wave resonator (5,6,9) is positioned on the side of higher frequencies than those of the pass band of the surface acoustic wave filter disposed on the side where the one-port surface acoustic wave resonator is connected in series.
    • 一种声表面波器件包括连接在输入端(3)和输出端(4)之间的第一表面声波滤波器(1),具有与第一表面声波滤波器(1)的中心频率不同的第二表面声波滤波器 (3)和输出端(4)之间并与第一表面声波滤波器并联的至少一个单端声表面波滤波器(1),以及至少一个单端声表面波谐振器(5) (3)与第一和第二表面声波滤波器(1)中的至少一个之间的至少一侧上与第一或第二表面声波滤波器(1,2)串联连接, ,2)或输出端(4)与第一和第二表面声波滤波器(1,2)中的至少一个之间。 一个单端口型弹性表面波谐振器(5,6,9)的反共振频率位于比设置在单端口弹性表面波谐振器(5,6,9)一侧的表面声波滤波器的通带高的频率侧, 端口表面声波谐振器串联连接。
    • 9. 发明公开
    • 표면 탄성파 필터의 잡음 방지 구조
    • 表面声波滤波器的噪声消除结构
    • KR1020030088995A
    • 2003-11-21
    • KR1020020026862
    • 2002-05-15
    • 엘지이노텍 주식회사
    • 이승기
    • H03H9/64
    • H03H9/64H03H9/1092H03H9/25H03H9/30H03H9/6473
    • PURPOSE: A noise eliminating structure of a SAW(Surface Acoustic Wave) filter is provided to prevent the noise generated upon filtering signals by increasing area from a cross region of fingers to a region of a ground electrode. CONSTITUTION: An input electrode(42) is comprised of a signal electrode(42a) and a ground electrode(42b). The signal electrode(42a) and the ground electrode(42b) are disposed in parallel on a piezoelectric substrate(30). An input IDT(InterDigital Transducer)(40) is comprised of a plurality of input fingers(41). An output electrode(52) is comprised of signal and ground electrodes(52a,52b), which are disposed in parallel with the input IDT(40). An output IDT(50) is comprised of a plurality of output fingers(51). The input fingers(41) of the input IDT(40) are crossed to form a predetermined pattern. An area(43b) from the cross region of the input fingers(41) to the ground electrode(42b) is greater than an area(43a) from the cross region to the signal electrode(42a).
    • 目的:提供SAW(表面声波)滤波器的噪声消除结构,以通过增加从手指的交叉区域到接地电极的区域的面积来防止滤波信号产生的噪声。 构成:输入电极(42)由信号电极(42a)和接地电极(42b)构成。 信号电极(42a)和接地电极(42b)平行配置在压电基板(30)上。 输入IDT(数字间传感器)(40)由多个输入指状物(41)组成。 输出电极(52)由与输入IDT(40)并联设置的信号和接地电极(52a,52b)组成。 输出IDT(50)由多个输出指(51)组成。 输入IDT(40)的输入指状物(41)交叉以形成预定图案。 从输入爪(41)到接地电极(42b)的交叉区域的区域(43b)大于从交叉区域到信号电极(42a)的区域(43a)。
    • 10. 发明公开
    • 표면탄성파 필터의 회절효과 방지구조
    • 防止表面声波滤波器的衍射效应的结构
    • KR1020030088819A
    • 2003-11-20
    • KR1020020026867
    • 2002-05-15
    • 엘지이노텍 주식회사
    • 김주상
    • H03H9/64
    • H03H9/64H03H9/14511H03H9/25H03H9/6473
    • PURPOSE: A structure for preventing a diffraction effect of a SAW(Surface Acoustic Wave) filter is provided to prevent the degradation of filter characteristics due to the diffraction effect by omitting a process of applying a sound absorbing material on a signal bus bar. CONSTITUTION: A piezoelectric substrate(40) is located within a package(30) and induces piezoelectric characteristics in response to electric field. An input IDT(InterDigital Transducer)(41) is formed on the piezoelectric substrate(40) as a pattern and transforms an electrical signal from the external into a mechanical signal. A ground (42) eliminates noise from the mechanical signal from the input IDT(41). An output IDT(43) transforms the mechanical signal from the ground (42) into a corresponding electrical signal. The input IDT(41), the ground(42), and the output IDT(43) are provided with signal bus bars(41a,42a,43a) and finger units(41b,42b) that are formed between the signal bus bars(41a,42a,43a).
    • 目的:提供用于防止SAW(表面声波)滤波器的衍射效应的结构,以通过省略在信号母线上施加吸声材料的过程来防止由于衍射效应而导致的滤波器特性的劣化。 构成:压电衬底(40)位于封装(30)内并且响应于电场而感应压电特性。 在压电基板(40)上形成输入IDT(数字间传感器)(41)作为图案,并将电信号从外部变换为机械信号。 接地(42)消除来自输入IDT(41)的机械信号的噪声。 输出IDT(43)将来自地面(42)的机械信号变换成相应的电信号。 输入IDT(41),地(42)和输出IDT(43)设置有信号汇流条(41a,42a,43a)和手指单元(41b,42b),其形成在信号汇流条 41A,42A,43A)。