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31 条记录 (耗时 0.024 秒)

    High-frequency amplifier
    22.
    发明授权
    High-frequency amplifier 失效
    高频放大器

    公开(公告)号：US06768383B2

    公开(公告)日：2004-07-27

    申请号：US10220113

    申请日：2002-12-04

    申请人： Hiroshi Kushitani ,  Hisayoshi Kato ,  Michiaki Tsuneoka

    发明人： Hiroshi Kushitani ,  Hisayoshi Kato ,  Michiaki Tsuneoka

    IPC分类号： H03F3191

    CPC分类号： H03F3/60 ,  H01P1/2007 ,  H03H7/0123 ,  H03H7/1758 ,  H03H7/1766 ,  H03H7/1791 ,  H03H7/46

    摘要： A bias circuit is provided for attenuating harmonic distortions of a signal having a simple construction and which can be applied to a high-frequency amplifier used in a communication device, such as a mobile telephone. The circuit reduces a voltage drop therein and thus provides a high-frequency amplifier having reduced power consumption and an increased operating efficiency. The high-frequency amplifier includes an amplifier circuit, an output matching circuit, and the bias circuit. In the bias circuit, a parallel circuit including a first transmission line and a first capacitor has one end connected between the amplifier and the output matching circuit. The other end of the parallel circuit is connected to a power source and is grounded via a second capacitor. In the circuit, the bias circuit can be short-circuited in a desired frequency band while being an open circuit in a frequency band of a signal to be amplified, hence attenuating the harmonic distortions without using a low pass filter.

    摘要翻译： 提供了一种偏置电路，用于衰减具有简单结构的信号的谐波失真，并且可以应用于诸如移动电话的通信设备中使用的高频放大器。 该电路减少其中的电压降，从而提供具有降低的功耗和提高的操作效率的高频放大器。 高频放大器包括放大器电路，输出匹配电路和偏置电路。 在偏置电路中，包括第一传输线和第一电容器的并联电路的一端连接在放大器和输出匹配电路之间。 并联电路的另一端连接到电源，并通过第二电容器接地。 在该电路中，偏置电路可以在期望的频带中短路，同时是要放大的信号的频带中的开路，因此在不使用低通滤波器的情况下衰减谐波失真。

    Surface acoustic wave filter and device employing it
    24.
    发明授权
    Surface acoustic wave filter and device employing it 有权
    表面声波滤波器及其使用的器件

    公开(公告)号：US07286028B2

    公开(公告)日：2007-10-23

    申请号：US10517827

    申请日：2004-06-08

    申请人： Hiroshi Kushitani ,  Shinobu Nakaya

    发明人： Hiroshi Kushitani ,  Shinobu Nakaya

    IPC分类号： H03H9/64

    CPC分类号： H03H9/6483

    摘要： A surface acoustic wave (SAW) filter includes a first SAW resonator, a second SAW resonator connected in series to the first SAW resonator at a first node, a third SAW resonator connected in series to the second SAW resonator at a second node, a fourth SAW resonator connected in series to the third SAW resonator at a third node, a fifth SAW resonator connected between the first node and ground, a sixth SAW resonator connected between the third node and ground, and a first capacitance element connected between the second node and ground. Further, the SAW filter includes a first inductance element connected in series to the fifth SAW resonator, and a second inductance element connected in series to the sixth SAW resonator. This SAW filter has a sharp attenuation at a high frequency of a pass band, thereby widening the pass band and reducing the loss thereof.

    摘要翻译： 表面声波（SAW）滤波器包括第一SAW谐振器，在第一节点与第一SAW谐振器串联连接的第二SAW谐振器，在第二节点与第二SAW谐振器串联连接的第三SAW谐振器，第四节点 SAW谐振器在第三节点处与第三SAW谐振器串联连接，连接在第一节点和地之间的第五SAW谐振器，连接在第三节点和地之间的第六SAW谐振器和连接在第二节点和地之间的第一电容元件 地面。 此外，SAW滤波器包括与第五SAW谐振器串联连接的第一电感元件和与第六SAW谐振器串联连接的第二电感元件。 该SAW滤波器在通带的高频下具有明显的衰减，从而扩大通带并减少其损耗。

    Surface acoustic wave filter
    25.
    发明授权
    Surface acoustic wave filter 有权
    表面声波滤波器

    公开(公告)号：US07183878B2

    公开(公告)日：2007-02-27

    申请号：US10526919

    申请日：2004-08-20

    申请人： Hiroshi Kushitani ,  Shinobu Nakaya ,  Takeo Yasuho

    发明人： Hiroshi Kushitani ,  Shinobu Nakaya ,  Takeo Yasuho

    IPC分类号： H03H9/72 ,  H03H9/64

    CPC分类号： H03H9/0576

    摘要： A surface acoustic wave filter having a plurality of the transmission lines, each with one end connected to the surface acoustic wave element and the other end thereof connected to a ground. The transmission lines are divided by an additional transmission line which has multiple connections to a ground electrode at an interval equal to or lower than a wavelength of a using frequency. This structure provides grounds among a plurality of transmission lines and thus isolation among terminals can be increased to improve the filter characteristic.

    摘要翻译： 一种表面声波滤波器，具有多个传输线，每个传输线的一端连接到声表面波元件，另一端连接到地面。 传输线被以与等于或小于使用频率的波长的间隔具有到接地电极的多个连接的附加传输线分开。 这种结构在多个传输线之间提供接地，从而可以增加终端之间的隔离以提高滤波器特性。

    High frequency switch
    26.
    发明授权
    High frequency switch 失效
    高频开关

    公开(公告)号：US06933802B2

    公开(公告)日：2005-08-23

    申请号：US10649626

    申请日：2003-08-28

    申请人： Hiroshi Kushitani ,  Yasushi Nagata ,  Takeo Yasuho

    发明人： Hiroshi Kushitani ,  Yasushi Nagata ,  Takeo Yasuho

    IPC分类号： H01P1/15 ,  H03K17/693 ,  H04B1/44

    CPC分类号： H01P1/15 ,  H03K17/693

    摘要： A frequency switch is configured with two FET switches. One end of a second FET switch is connected between an I/O port and a reception port and the other end is ground. A strip line is connected between the second FET switch and the I/O port, and has an electrical length equivalent to ¼ wavelength of a high frequency signal input from transmission port.

    摘要翻译： 频率开关配置有两个FET开关。 第二FET开关的一端连接在I / O端口和接收端口之间，另一端接地。 带状线连接在第二FET开关和I / O端口之间，其电气长度等于从传输端口输入的高频信号的1/4波长。

    High frequency switch module
    27.
    发明授权
    High frequency switch module 失效
    高频开关模块

    公开(公告)号：US06856187B2

    公开(公告)日：2005-02-15

    申请号：US10696646

    申请日：2003-10-29

    申请人： Hiroshi Kushitani ,  Yasushi Nagata ,  Takeo Yasuho

    发明人： Hiroshi Kushitani ,  Yasushi Nagata ,  Takeo Yasuho

    IPC分类号： H01P1/15 ,  H03H7/19 ,  H03H7/46 ,  H03H11/34 ,  H03K17/76 ,  H04B1/50 ,  H03K17/04

    CPC分类号： H03H11/342 ,  H01P1/15 ,  H03H7/19 ,  H03H7/461 ,  H03K17/76

    摘要： A high frequency switch module can handle transmit-receive signals of different frequency bands and realize excellent isolation. The high frequency switch module comprises a discriminating filter, a low-band high frequency switch, and a high-band frequency switch, wherein high-band 90-degree phase shifter that forms at least a high-band high frequency switch is configured by a high-pass filter, and a choke line is parallel-connected to the high-pass filter.

    摘要翻译： 高频开关模块可以处理不同频带的发送接收信号，实现优异的隔离。 高频开关模块包括识别滤波器，低频高频开关和高频带开关，其中形成至少高频高频开关的高频带90度移相器由 高通滤波器和扼流线并联连接到高通滤波器。

    Dielectric laminated filter
    30.
    发明授权
    Dielectric laminated filter 失效
    电介质层压过滤器

    公开(公告)号：US6140891A

    公开(公告)日：2000-10-31

    申请号：US954381

    申请日：1997-10-20

    申请人： Hideaki Nakakubo ,  Toshio Ishizaki ,  Toru Yamada ,  Shoichi Kitazawa ,  Hiroshi Kushitani

    发明人： Hideaki Nakakubo ,  Toshio Ishizaki ,  Toru Yamada ,  Shoichi Kitazawa ,  Hiroshi Kushitani

    IPC分类号： H01P1/203

    CPC分类号： H01P1/2039

    摘要： A dielectric laminated filter has a first dielectric laminated block including a first strip line electrode and a second dielectric laminated block including a second strip line electrode and a coupling element, wherein the first and the second dielectric laminated blocks are laminated via a first shield electrode and wherein the first and the second strip lines are connected via a third strip line. This configuration allows the unwanted electromagnetic coupling between a resonator and the coupling element to be neglected, and uses the third strip line electrode to form the first and the second strip line electrodes so that they extend across different layers, thereby enabling the size of the resonator to be reduced. In addition, since the third strip line electrode serves to adjust the filter characteristics, a small high-performance dielectric laminated filter that can be designed easily can be provided.

    摘要翻译： 电介质层压滤波器具有包括第一带状线电极的第一电介质层叠块和包括第二带状线电极和耦合元件的第二电介质层叠块，其中第一和第二电介质层叠块经由第一屏蔽电极层叠， 其中所述第一和第二带状线经由第三带状线连接。 该配置允许谐振器和耦合元件之间的不需要的电磁耦合被忽略，并且使用第三带状线电极形成第一和第二带状线电极，使得它们跨越不同的层延伸，从而使谐振器的尺寸 要减少 此外，由于第三带状线电极用于调节滤波器特性，因此可以提供容易设计的小型高性能介质层压滤波器。