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    • 25. 发明授权
    • Variable capacitance device and portable phone
    • 可变电容设备和便携式电话
    • US07937056B2
    • 2011-05-03
    • US11755107
    • 2007-05-30
    • Kazuhiko ItayaHiroshi YoshidaTakashi Kawakubo
    • Kazuhiko ItayaHiroshi YoshidaTakashi Kawakubo
    • H04B1/18
    • H01G5/18
    • A variable capacitance device has a piezoelectric driving part, a movable electrode, a fixed electrode, a dielectric film and a driving control unit. The piezoelectric driving part has a piezoelectric film, an upper electrode disposed on a top surface of the piezoelectric film, a lower electrode disposed on an undersurface of the piezoelectric film and electrode slits which separate the upper electrode and the lower electrode into two, respectively. The movable electrode is provided via the electrode slits at one end of the piezoelectric driving part. The fixed electrode is disposed opposite to the movable electrode via a gap. The dielectric film is disposed opposite to the movable electrode via the gap and provided on the fixed electrode. The driving control unit adjusts a distance between the movable electrode and the fixed electrode to reduce a fluctuation of a predetermined capacitance of a variable capacitor formed between the variable electrode and the fixed electrode.
    • 可变电容器件具有压电驱动部,可动电极,固定电极,电介质膜和驱动控制部。 压电驱动部分具有压电膜,设置在压电膜的顶表面上的上电极,设置在压电膜的下表面上的下电极以及分别将上电极和下电极分成两部分的电极狭缝。 可动电极通过电极狭缝设置在压电驱动部分的一端。 固定电极通过间隙与可动电极相对设置。 电介质膜经由间隙与可动电极相对设置,设置在固定电极上。 驱动控制单元调整可动电极和固定电极之间的距离,以减小形成在可变电极和固定电极之间的可变电容器的预定电容的波动。
    • 27. 发明授权
    • Cognitive radio system
    • 认知无线电系统
    • US07917110B2
    • 2011-03-29
    • US11790855
    • 2007-04-27
    • Tomoya HoriguchiHiroshi YoshidaTazuko TomiokaKatsuya NoninRen Sakata
    • Tomoya HoriguchiHiroshi YoshidaTazuko TomiokaKatsuya NoninRen Sakata
    • H04B1/18
    • H04W16/14H04W24/00H04W48/08H04W88/14
    • A cognitive radio system includes: a state detecting device that scans a frequency band allocated to another radio system than the cognitive radio system to detect a first use-state of the frequency band; a first server including a first gathering unit that receives first information relating to the first use-state and a second gathering unit; a second server that stores a second use-state of the frequency band allocated to the other radio system, the second server configured to provide second information relating to the second use-state to the second gathering unit; and a notifying unit that notifies a terminal device in the cognitive radio system of information of an available channel based on the first information and the second information.
    • 认知无线电系统包括:状态检测装置,其扫描分配给不同于认知无线电系统的另一无线电系统的频带,以检测频带的第一使用状态; 第一服务器,包括接收与第一使用状态有关的第一信息的第一收集单元和第二收集单元; 第二服务器,其存储分配给另一无线电系统的频带的第二使用状态,所述第二服务器被配置为向所述第二收集单元提供与所述第二使用状态有关的第二信息; 以及通知单元,其基于所述第一信息和所述第二信息,向所述认知无线系统中的终端设备通知可用信道的信息。