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31 条记录 (耗时 0.022 秒)

    Low-pass filter with directional coupler and cellular phone
    1.
    发明授权
    Low-pass filter with directional coupler and cellular phone 失效
    带定向耦合器和蜂窝电话的低通滤波器

    公开(公告)号：US6150898A

    公开(公告)日：2000-11-21

    申请号：US952008

    申请日：1998-01-08

    申请人： Hiroshi Kushitani ,  Naoki Yuda ,  Yoshikuni Fujihashi ,  Koji Hashimoto

    发明人： Hiroshi Kushitani ,  Naoki Yuda ,  Yoshikuni Fujihashi ,  Koji Hashimoto

    IPC分类号： H01P5/18 ,  H01P1/203 ,  H04B1/04

    CPC分类号： H01P5/185

    摘要： An integrated component providing the function of both a conventional directional coupler and a low-pass filter having two attenuation poles at a specified frequency band without changing the line length. Stub lines are connected to both ends of a main transmission line of a directional coupler. A frequency of the attenuation poles is adjustable by characteristic impedance, terminating conditions, and line length of the stub lines.

    摘要翻译： PCT No.PCT / JP97 / 00815 Sec。 371日期1998年1月8日 102（e）日期1998年1月8日PCT 1997年3月14日PCT公布。 WO97 / 36341 PCT出版物 日期1997年10月2日提供常规定向耦合器和具有在指定频带具有两个衰减极点的低通滤波器的功能的集成部件，而不改变线路长度。 短截线连接到定向耦合器的主传输线的两端。 衰减极的频率可通过特征阻抗，终止条件和短线的线路长度来调节。

    Diode compensation circuit including two series and one parallel resonance points
    5.
    发明授权
    Diode compensation circuit including two series and one parallel resonance points 失效
    二极管补偿电路包括两个串联和一个并联谐振点

    公开(公告)号：US06496083B1

    公开(公告)日：2002-12-17

    申请号：US09242139

    申请日：1999-02-03

    申请人： Hiroshi Kushitani ,  Naoki Yuda ,  Hiroshi Takahashi ,  Makoto Fujikawa

    发明人： Hiroshi Kushitani ,  Naoki Yuda ,  Hiroshi Takahashi ,  Makoto Fujikawa

    IPC分类号： H03H746

    CPC分类号： H01P1/15

    摘要： The present invention aims to realize, in regard to a high frequency switch used for a mobile communication apparatus such as a portable telephone or the like, a dual band switch having simple structure and changeable to ON and OFF states in two bands. For realizing the aim, the present invention provide a dual band switch comprising a series circuit of a PIN diode (101) and its compensation circuit (102), and, the compensation circuit (102) is formed with a circuit having at least two series resonance points and one parallel resonance point. The above structure allows the impedance of the compensation circuit, which is capacitive in low frequency close to a direct current, to be inductive after undergoing the first series resonance point, whereby the parasitic capacity of the diode is canceled in the first band, and also to be inductive again after undergoing the parallel resonance point and the following series resonance point, whereby the parasitic capacity of the PIN diode is canceled in the second band.

    摘要翻译： 本发明旨在实现对于诸如便携式电话等的移动通信装置所使用的高频开关，具有两个结构简单且可变为两个频带的导通和截止状态的双频带开关。 为了实现该目的，本发明提供一种包括PIN二极管（101）及其补偿电路（102）的串联电路的双频带开关，并且补偿电路（102）形成有具有至少两个串联 共振点和一个并联谐振点。 上述结构允许在经历第一串联谐振点之后，低频接近直流电容的补偿电路的阻抗为电感，从而在第一频带中消除二极管的寄生电容，并且还 在经历并联谐振点和随后的串联谐振点之后再次感应，由此PIN二极管的寄生电容在第二频带中被消除。

    Matching circuit chip, filter with matching circuit, duplexer and cellular phone
    6.
    发明授权
    Matching circuit chip, filter with matching circuit, duplexer and cellular phone 有权
    匹配电路芯片，带匹配电路的滤波器，双工器和手机

    公开(公告)号：US06326863B1

    公开(公告)日：2001-12-04

    申请号：US09215132

    申请日：1998-12-18

    申请人： Hiroshi Kushitani ,  Toru Yamada ,  Naoki Yuda ,  Toshio Ishizaki ,  Hideaki Nakakubo ,  Makoto Fujikawa

    发明人： Hiroshi Kushitani ,  Toru Yamada ,  Naoki Yuda ,  Toshio Ishizaki ,  Hideaki Nakakubo ,  Makoto Fujikawa

    IPC分类号： H01P512

    CPC分类号： H01P1/2135 ,  H01P1/2039 ,  H01P5/02

    摘要： The present matching circuit chip has an integrated shape comprising a first transmission line, a second transmission line and a third transmission line, wherein one end of the first transmission line, one end of the second transmission line and one end of the third transmission line are connected to one another, a first filter connection terminal is connected to the other end of the first transmission line, an antenna terminal is connected to the other end of the second transmission line, and a second filter connection terminal is connected to the other end of the third transmission line, whereby the second transmission line converts the characteristic impedances of the first and third transmission lines so that the impedance matching between the antenna terminal and the first filter connection terminal can be attained, and so that the impedance matching between the antenna terminal and the second filter connection terminal can be attained.

    摘要翻译： 本匹配电路芯片具有包括第一传输线，第二传输线和第三传输线的集成形状，其中第一传输线的一端，第二传输线的一端和第三传输线的一端为 彼此连接，第一过滤器连接端子连接到第一传输线的另一端，天线端子连接到第二传输线的另一端，第二滤波器连接端子连接到第二传输线的另一端 第三传输线，由此第二传输线转换第一和第三传输线的特性阻抗，使得可以获得天线端子和第一滤波器连接端子之间的阻抗匹配，并且使得天线端子之间的阻抗匹配 并且可以实现第二过滤器连接端子。

    SAW filter and electronic device including SAW filter
    9.
    发明授权
    SAW filter and electronic device including SAW filter 有权
    SAW滤波器和包括SAW滤波器的电子器件

    公开(公告)号：US06903631B2

    公开(公告)日：2005-06-07

    申请号：US10634524

    申请日：2003-08-05

    申请人： Hiroshi Kushitani ,  Shunichi Seki

    发明人： Hiroshi Kushitani ,  Shunichi Seki

    IPC分类号： H03H9/64 ,  H03H9/05 ,  H03H9/25 ,  H03H9/72

    CPC分类号： H03H9/0542 ,  H03H9/14597 ,  H03H9/6479 ,  H03H9/6483 ,  H03H9/6493

    摘要： A surface acoustic wave (SAW) filter includes an input terminal, an output terminal, a series resonator provided between the input terminal and the output terminal, first and second parallel resonators having respective one ports connected to respective ports of the series resonator, respectively, first and second nodes connected to respective other ports of the first and second parallel resonators, respectively, first and second inductance elements having respective one ends connected to the first and second nodes, respectively, a third node connected to respective other ends of the first and second inductance elements, a third inductance element having one end connected to the third node, a grounding terminal connected to other end of the third inductance element, and a capacitance element connected between the first and second nodes. The SAW filter has a large attenuation amount at a lower side of a pass band of the filter, thus having sufficient properties.

    摘要翻译： 表面声波（SAW）滤波器包括输入端子，输出端子，设置在输入端子和输出端子之间的串联谐振器，第一和第二并联谐振器分别具有连接到串联谐振器的各个端口的相应的一个端口， 第一和第二节点分别连接到第一和第二并联谐振器的相应的其它端口，第一和第二电感元件分别具有分别连接到第一和第二节点的一端，连接到第一和第二并联谐振器的相应另一端的第三节点， 第二电感元件，具有连接到第三节点的一端的第三电感元件，连接到第三电感元件的另一端的接地端子以及连接在第一和第二节点之间的电容元件。 SAW滤波器在滤波器的通带的下侧具有较大的衰减量，因此具有足够的性能。

    Filter
    10.
    发明授权
    Filter 失效
    过滤

    公开(公告)号：US06633209B2

    公开(公告)日：2003-10-14

    申请号：US10082969

    申请日：2002-02-25

    申请人： Hiroshi Kushitani ,  Masayuki Mizuno

    发明人： Hiroshi Kushitani ,  Masayuki Mizuno

    IPC分类号： H03H709

    CPC分类号： H03H7/09

    摘要： Here disclosed is a parallel-resonance type band-pass filter, which is employed for mobile communications equipment such as a mobile phone. According to the filter, each resonator has a single capacitor and serially connected plural inductors both of which are formed on the surface or on an inner layer of a substrate. Electromagnetic coupling between the resonators is established through electromagnetic coupling between at least a pair of inductors—the inductors of the pair belong to respective resonators. The input and the output terminals are coupled with the respective resonators via the capacitor having a properly determined capacitance. With such a simple structure, the filter also can work as an impedance transformer, with the result that the mobile communications equipment will be much smaller.

    摘要翻译： 这里公开了一种并行谐振型带通滤波器，其被用于诸如移动电话的移动通信设备。 根据滤波器，每个谐振器具有单个电容器并且串联连接多个电感器，它们都形成在基板的表面上或内层上。 通过至少一对电感器之间的电磁耦合建立谐振器之间的电磁耦合 - 该对电感器的电感器属于相应的谐振器。 输入端子和输出端子通过具有适当确定的电容的电容器与相应的谐振器耦合。 通过这样一个简单的结构，滤波器也可以作为阻抗变压器工作，结果是移动通信设备将小得多。