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    • 2. 发明授权
    • High-frequency composite switch component
    • 高频复合开关元件
    • US07035602B2
    • 2006-04-25
    • US09913259
    • 2000-12-14
    • Yuki SatohTetsuya TsurunariKoji HashimotoHiroshi TakahashiKozo Murakami
    • Yuki SatohTetsuya TsurunariKoji HashimotoHiroshi TakahashiKozo Murakami
    • H01Q11/12
    • H04B1/0057H01P1/15H04B1/406H04B1/48
    • A hybrid radio frequency (RF) switching device includes first to fourth ports, a diode coupled between the first port and second port, a first transmission line having a length of λg/4 (where λg is a wave length of a frequency in a first frequency band), and a first element coupled in series with the first transmission line having an almost simple reactance component and nearly opening in a second frequency band. The first transmission line and first element are coupled in series between the second port and third port. The device further includes a second transmission line having a length of λd/4 (where λd is a wavelength of a frequency in the second frequency band), and a second element having an almost simple reactance component and nearly opening in the first frequency band. The second transmission line and second element are coupled in series between the second port and fourth port.
    • 混合射频(RF)开关装置包括第一至第四端口,耦合在第一端口和第二端口之间的二极管,具有长度lambdag / 4的第一传输线(其中lambdag是第一端口和第二端口中的频率的波长 频带),以及与第一传输线串联耦合的第一元件具有几乎简单的电抗分量并且在第二频带中几乎打开。 第一传输线和第一元件串联耦合在第二端口和第三端口之间。 该装置还包括具有长度lambdad / 4(其中lambdad是第二频带中的频率的波长)的第二传输线,以及具有几乎简单的电抗分量并且在第一频带中几乎打开的第二元件。 第二传输线和第二元件串联耦合在第二端口和第四端口之间。
    • 7. 发明授权
    • Surface acoustic wave filter utilizing a transmission line with phase characteristics that increase filter out of band attenuation
    • 利用具有增加滤波器带外衰减的相位特性的传输线的表面声波滤波器
    • US06404302B1
    • 2002-06-11
    • US09600233
    • 2000-09-05
    • Yuki SatohToru SakuragawaKozo Murakami
    • Yuki SatohToru SakuragawaKozo Murakami
    • H03H964
    • H03H9/6483
    • The present invention relates to a surface acoustic wave (SAW) filter which is used for cellular phones and other mobile communication equipment. The object of the present invention is to realize a SAW filter of which attenuation characteristics and pass characteristics can be set arbitrarily. The SAW filter of the present invention comprises comb-shaped electrodes facing each other disposed on the same piezoelectric substrate, at least two resonators with an input and output terminals, and an equivalent transmission line which is connected between an output terminal of a first resonator and an input terminal of a second resonator. The phase of the transmission line can be adjusted from 5 degrees to 175 degrees arbitrarily at the series resonance frequency of the resonators. This structure realizes a band-stop filter or a band-pass filter whose attenuation characteristics and pass characteristics can be set arbitrarily.
    • 本发明涉及一种用于蜂窝电话和其他移动通信设备的声表面波(SAW)滤波器。 本发明的目的是实现可以任意设定衰减特性和通过特性的SAW滤波器。 本发明的SAW滤波器包括设置在同一压电基片上的彼此相对的梳状电极,至少两个具有输入和输出端子的谐振器和连接在第一谐振器的输出端子和 第二谐振器的输入端。 传输线的相位可以在共振器的串联谐振频率下任意调整为5度至175度。 该结构实现了可以任意设定衰减特性和通过特性的带阻滤波器或带通滤波器。
    • 10. 发明授权
    • Antenna duplexer
    • 天线双工器
    • US06891449B2
    • 2005-05-10
    • US10087275
    • 2002-03-01
    • Ryoichi TakayamaTetsuo KawasakiYuki SatohKozo MurakamiToru Sakuragawa
    • Ryoichi TakayamaTetsuo KawasakiYuki SatohKozo MurakamiToru Sakuragawa
    • H01P1/213H03H7/19H03H9/145H03H9/25H03H9/64H03H9/72H04B1/50
    • H03H9/6483H03H7/19
    • An antenna duplexer has a power durability to a signal input from an antenna terminal and has stable characteristics. The antenna duplexer includes an input terminal, a transmission filter including a surface acoustic wave (SAW) filter having an input port connected to the input terminal, a phase shifter having an input port connected to an output port of the transmission filter, a reception filter having an input port connected to an output port of the phase shifter, an output terminal connected to the output port of the reception filter, and an antenna terminal connected between the transmission filter and the phase shifter. The transmission filter has a power durability at the output port of the filter, being equal to or larger than a power durability at the input port of the filter.
    • 天线双工器具有对从天线端子输入的信号的功率耐久性,并具有稳定的特性。 天线双工器包括输入端子,包括具有连接到输入端子的输入端口的表面声波滤波器的发送滤波器,具有连接到发送滤波器的输出端口的输入端口的移相器,接收滤波器 具有连接到移相器的输出端口的输入端口,连接到接收滤波器的输出端口的输出端子以及连接在发送滤波器和移相器之间的天线端子。 传动过滤器在过滤器的输出端口处具有等于或大于过滤器的输入端口处的功率耐久性的功率耐久性。