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    • 74. 发明申请
    • MOBILE RADIO APPARATUS
    • 移动无线电设备
    • US20110260933A1
    • 2011-10-27
    • US13142208
    • 2009-06-23
    • Tsukasa TakahashiHaruhiko Kakitsu
    • Tsukasa TakahashiHaruhiko Kakitsu
    • H01Q1/24
    • H01Q1/243H01Q1/521H01Q21/28
    • A mobile radio apparatus that can prevent degradation of the antenna characteristic if three or more antenna elements are included is provided.A mobile radio apparatus includes a housing; a circuit board 20 provided in the housing; and a first antenna 11, a second antenna 12, and a third antenna 13 placed in one end in the housing and operating in different operation frequency bands. The first antenna 11 operates in a first operation frequency band, the second antenna 12 operates in a second frequency band close to the first operation frequency band, and the third antenna 13 operates in a third operation frequency band not close to the first operation frequency band or the second operation frequency band and is placed between the first antenna 11 and the second antenna 12 in the one end in the housing.
    • 提供了如果包括三个或更多个天线元件,则能够防止天线特性劣化的移动无线电设备。 移动无线电设备包括壳体; 设置在壳体中的电路板20; 第一天线11,第二天线12和第三天线13,其一端放置在壳体中并在不同的工作频带中工作。 第一天线11在第一操作频带中工作,第二天线12在靠近第一操作频带的第二频带中操作,并且第三天线13在不接近第一操作频带的第三操作频带中操作 或第二操作频带,并且在壳体的一端放置在第一天线11和第二天线12之间。
    • 75. 发明申请
    • PORTABLE WIRELESS APPARATUS
    • 便携式无线电设备
    • US20090267842A1
    • 2009-10-29
    • US12094865
    • 2006-02-14
    • Kenji TakagiToshiteru HayashiTsukasa TakahashiYutaka Saito
    • Kenji TakagiToshiteru HayashiTsukasa TakahashiYutaka Saito
    • H01Q1/24H01Q3/24
    • H04B1/18H04B7/082H04B7/0837H04B7/0871
    • It is an object to relieve deterioration in efficiency due to the influence electromagnetic coupling between antennas and to obtain a high diversity gain, and a high transmission speed and a large communication capacity in an MIMO system. In a portable wireless machine including two types of antennas 11A and 11B for receiving a digital modulating signal, matching circuits 12A and 12B set individually to the antennas 11A and 11B respectively, tuners 13A and 13B, demodulating portions 14A and 14B, a combining portion 15 for combining a demodulated signal, and receiving quality deciding portions 17A, 17B and 17C for outputting receiving qualities in respective branches and after a combination, a diversity effect decision is made by using the receiving quality after the combination and a receiving quality in a single branch receipt, and a matching condition of the matching circuit 12A or the matching circuit 12B of the antenna 11A or the antenna 11B is controlled corresponding to a result.
    • 由于影响天线之间的电磁耦合,在MIMO系统中获得高的分集增益,高的传输速度和较大的通信容量,其目的在于减轻效率的降低。 在包括用于接收数字调制信号的两种类型的天线11A和11B的便携式无线电机中,分别设置到天线11A和11B的匹配电路12A和12B,调谐器13A和13B,解调部分14A和14B,组合部分15 用于组合解调信号,以及接收质量决定部分17A,17B和17C,用于输出各分支中的接收质量和组合之后,通过使用组合之后的接收质量和在单个分支中的接收质量来进行分集效应判定 对应于结果来控制天线11A或天线11B的匹配电路12A或匹配电路12B的匹配条件。
    • 78. 发明申请
    • Optical transmission system
    • 光传输系统
    • US20050041968A1
    • 2005-02-24
    • US10808606
    • 2004-03-25
    • Tsukasa Takahashi
    • Tsukasa Takahashi
    • H04B10/07H04B10/077H04B10/079H04B17/00H04J14/00H04J14/02H04B10/08
    • H04J14/0275H04B10/0775H04B2210/077H04B2210/078H04B2210/08H04J14/0279H04L7/0008H04L7/0075
    • In an optical transmission system: a first unit generates a first optical supervisory signal being arranged on the shorter-wavelength side of main signals and containing information for determining continuity of an optical transmission line and a second optical supervisory signal arranged on the longer-wavelength side of the main signals and used for supervisory control of optical communication; a second unit generates a wavelength-multiplexed signal by optically multiplexing the main signals and the first and second optical supervisory signals, and transmits the wavelength-multiplexed signal onto the optical transmission line; a third unit receives the wavelength-multiplexed signal, and optically demultiplexes the wavelength-multiplexed signal into the main signals and the first and second optical supervisory signals; and a fourth unit determines whether or not the optical transmission line is optically continuous, based on the first optical supervisory signal, and performs supervisory control of optical communication based on the second optical supervisory signal.
    • 在光传输系统中:第一单元产生布置在主信号的较短波长侧的第一光监控信号,并包含用于确定光传输线的连续性的信息和布置在较长波长侧的第二光监控信号 的主要信号,用于光通信的监控; 第二单元通过对主信号和第一和第二光监控信号进行光学多路复用产生波长复用信号,并将波长多路复用信号发送到光传输线上; 第三单元接收波分复用信号,并且将波分复用信号光解复用为主信号和第一和第二光监控信号; 并且第四单元基于第一光监控信号确定光传输线是否是光学连续的,并且基于第二光监控信号执行光通信的监控。