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    • 92. 发明公开
    • FILTER, PORTABLE TERMINAL, AND ELECTRONIC COMPONENT
    • 过滤器,TRAGBARESENDGERÄTUND ELEKTRONISCHES BAUTEIL
    • EP2246980A1
    • 2010-11-03
    • EP09707480.1
    • 2009-02-05
    • Nihon Dempa Kogyo Co., Ltd.
    • ONZUKA, Tatsunori
    • H03H9/64H03H9/54
    • H03H7/075H03H7/1758H03H9/542H03H9/547H03H9/605H03H9/6409H03H9/6483
    • Objects of the present invention is obtain a steep and large attenuation amount in attenuation bands close to each other out of a band of a TV wave and to provide a filter in which the use number of inductors is reduced thereby to be able to contribute to downsizing of a device.
      In the present invention, elastic wave resonators of a plurality of parallel arms for each forming a plurality of attenuation band are connected to the same electric potential point in a signal path without aid of an inductor. Otherwise, a series circuit of a plurality of element parts generating series resonance is connected in a signal path as a parallel arm. Therefore, a large attenuation amount can be obtained in each of the plural attenuation bands, but a region equivalent to what is called a zero point exists between adjacent poles. However, there can be obtained a characteristic in which steep attenuations occur in both sides of the zero point even if the zero point exists. Sets of elastic wave resonators (sets of resonators) connected to the same potential points or parallel arms constituted by the series circuits are connected in a signal path in a plurality of stages, and an inductor for inverting a phase intervenes between the stages.
    • 本发明的目的是在TV波段的频带内彼此接近的衰减频带中获得陡峭且较大的衰减量,并且提供一种滤波器,其中电感器的使用数量减少,从而能够有助于减小尺寸 的设备。 在本发明中,用于各自形成多个衰减带的多个并联臂的弹性波谐振器在信号路径中的相同电位点处连接,而不需要电感器的帮助。 否则,产生串联谐振的多个元件部分的串联电路作为平行臂连接在信号路径中。 因此,可以在多个衰减带中的每一个中获得大的衰减量,但是在相邻极之间存在与所谓的零点相当的区域。 然而,即使存在零点,也可以获得在零点两侧出现陡峭衰减的特性。 连接到由串联电路构成的相同电位点或并联臂的弹性波谐振器(谐振器组)在多个级中连接在信号路径中,并且用于反相的电感器介入级之间。
    • 93. 发明公开
    • BALUN SIGNAL SPLITTER
    • BALUN,SIGNALTEILER
    • EP2186193A4
    • 2010-08-25
    • EP08828774
    • 2008-08-29
    • SKYWORKS SOLUTIONS INC
    • THOMPSON PHILIP H
    • H03H7/42H01P5/10
    • H01P5/10H03H7/1758H03H7/1791H03H7/422
    • A balun signal splitter for use in transceiver systems, such as wireless communications systems, including a wide-band balun with a secondary winding for signal splitting between two operating bands (e.g., high-band and low-band) or modes. An example of a balun signal splitter configured for dual-band or dual-mode operation or includes a balun having a primary winding and a secondary winding, the secondary winding having a first port and a second port, a first network coupled to the first port and configured to present a short circuit impedance at the first port at out-of-band frequencies or during out-of-mode operation, and a second network coupled to the second port and configured to present a short circuit impedance at the second port at out-of-band frequencies or during out-of-mode operation.
    • 用于诸如无线通信系统的收发器系统中的平衡 - 不平衡变换信号分离器,包括具有用于在两个工作频带(例如,高频带和低频带)之间的信号分离的次级绕组的宽带平衡 - 不平衡变换器。 配置用于双频或双模操作的平衡 - 不平衡变换信号分离器的示例或包括具有初级绕组和次级绕组的平衡 - 不平衡变压器,次级绕组具有第一端口和第二端口,第一网络耦合到第一端口 并且被配置为在所述第一端口处以带外频率或在模式外操作期间呈现短路阻抗,以及耦合到所述第二端口的第二网络,并且被配置为在所述第二端口处呈现短路阻抗 带外频率或模式外操作时。
    • 96. 发明公开
    • VARIABLE FREQUENCY BAND REMOVING FILTER
    • BANDFILTER MIT VARIABLER FREQUENZ
    • EP2128979A1
    • 2009-12-02
    • EP08711347.8
    • 2008-02-15
    • Murata Manufacturing Co. Ltd.
    • HARADA, TetsuroTONEGAWA, Ken
    • H03H7/12
    • H03H7/0115H03H7/0153H03H7/1758H03H7/1775H03H7/1791H03H2007/013H03H2210/012
    • A series resonance circuit (SR1) formed by a series circuit of an inductor (LN1) and a capacitor (CN1) and a series resonance circuit (SR2) formed by a series circuit of an inductor (LN2) and a capacitor (CN2) are connected in shunt to a signal line. A diode (D1) that is a switching element is disposed between the grounding end of the series resonance circuit (SR1) and the ground, and a diode (D2) that is a switching element is disposed between the grounding end of the series resonance circuit (SR2) and the ground. The connection point between the grounding end of the series resonance circuit (SR1) and the diode (D1) is connected to the ground via a frequency characteristic switching inductor (LN11) in a high-frequency manner, and the connection point between the grounding end of the series resonance circuit (SR2) and the diode (D2) is connected to the ground via a frequency characteristic switching inductor (LN22) in a high-frequency manner. A matching circuit (MC) formed by a multistage T-shape LCL circuit is disposed between the series resonance circuits (SR1 and SR2). The other end of the series resonance circuit (SR1) which is opposite to the grounding end thereof is connected to an input/output terminal (P1), and the other end of the series resonance circuit (SR2) which is opposite to the grounding end thereof is connected to an input/output terminal (P2).
    • 由电感器(LN1)和电容器(CN1)的串联电路和由电感器(LN2)和电容器(CN2)的串联电路形成的串联谐振电路(SR2)形成的串联谐振电路(SR1) 连接到信号线分流。 作为开关元件的二极管(D1)设置在串联谐振电路(SR1)的接地端和地之间,在串联谐振电路的接地端之间设置有作为开关元件的二极管(D2) (SR2)和地面。 串联谐振电路(SR1)的接地端和二极管(D1)之间的连接点通过频率特性开关电感器(LN11)以高频方式连接到地,并且接地端 串联谐振电路(SR2)和二极管(D2)通过频率特性开关电感器(LN22)以高频方式连接到地。 在串联谐振电路(SR1和SR2)之间设置由多级T型LCL电路形成的匹配电路(MC)。 串联谐振电路(SR1)的与其接地端相反的另一端连接到输入/输出端子(P1),串联谐振电路(SR2)的与接地端相反的另一端 其连接到输入/输出端子(P2)。
    • 98. 发明公开
    • HIGH FREQUENCY PART
    • HOCHFREQUENZELEMENT
    • EP2003788A1
    • 2008-12-17
    • EP08703453.4
    • 2008-01-18
    • Murata Manufacturing Co. Ltd.
    • UEJIMA, Takanori
    • H04B1/50H01P1/15H03H7/075H03H7/46
    • H01P1/2135H01P1/15H01P1/213H03H7/0115H03H7/175H03H7/1758H03H7/1766H03H7/46H03H2001/0085H03H2250/00H04B1/005
    • There is provided a high-frequency component in which, even when a SAW filter is provided in a low-frequency circuit and there is an impedance mismatch, high-frequency transmission characteristics are not degraded. The high-frequency component includes a diplexer (1) in which a high-pass filter (102) and a low-pass filter (101) are connected in parallel with an antenna port, a high-frequency circuit cascaded to the high-pass filter (102), and a low-frequency circuit cascaded to the low-pass filter (101). A filter which causes an impedance mismatch to occur is connected to the low-frequency circuit. The low-pass filter (101) includes a line (Lt1). The low-pass filter (101) is constituted by a parallel resonant circuit (101A) including the line (Lt1) and a series circuit (101B) including the line (Lt1). A resonance frequency of the parallel resonant circuit (101A) is a trap frequency of a high-frequency transmission/reception signal. A frequency of resonance of all elements of the low-pass filter (101) is a trap frequency of undesired resonance that occurs at high frequencies.
    • 提供了一种高频分量,其中即使在低频电路中设置SAW滤波器并且存在阻抗失配,高频传输特性也不会降低。 高频分量包括双工器(1),其中高通滤波器(102)和低通滤波器(101)与天线端口并联连接,高频电路级联到高通 滤波器(102)和级联到低通滤波器(101)的低频电路。 导致发生阻抗失配的滤波器连接到低频电路。 低通滤波器(101)包括线(Lt1)。 低通滤波器(101)由包括线路(Lt1)的并行谐振电路(101A)和包括线路(Lt1)的串联电路(101B)构成。 并联谐振电路(101A)的谐振频率是高频发送/接收信号的陷波频率。 低通滤波器(101)的所有元件的谐振频率是在高频下发生的不期望的谐振的陷波频率。