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    • 1. 发明授权
    • Communication device
    • 通讯设备
    • US06320734B1
    • 2001-11-20
    • US09287358
    • 1999-04-07
    • Hideki SonobeYasuo IwahashiMasayuki WatabeToshiaki SuzukiHiroyuki KiyanagiYasuhiro Shibuya
    • Hideki SonobeYasuo IwahashiMasayuki WatabeToshiaki SuzukiHiroyuki KiyanagiYasuhiro Shibuya
    • H02H500
    • H04Q1/10H04Q1/03H04Q1/035H04Q2201/06H04Q2201/10H04Q2201/808
    • A communication device includes a number of transmitter/receiver/modem blocks installed in vertical positions. Each of the transmitter/receiver/modem blocks includes a supporting board having a front surface and a back surface, the supporting board including a plurality of fins on the front surface and a plurality of forced air-cooling fans on the supporting board. A front cover encloses the front surface of the supporting board, the front cover and the fins forming a plurality of ducts, the front cover and the front surface forming an internal opening under the fins. A back cover encloses the back surface of the supporting board. First heat-radiating circuit modules are provided at positions adjacent to the fins on the front surface. A second heat-radiating circuit module is provided within the opening. When the forced air-cooling fans operate, the fans produce a flow of air along the plurality of ducts to cool the first heat-radiating circuit modules, and the fans producing a flow of air within the opening to cool the second heat-radiating circuit board.
    • 通信设备包括安装在垂直位置的多个发射机/接收机/调制解调器块。 发送器/接收器/调制解调器块中的每一个包括具有前表面和后表面的支撑板,支撑板包括前表面上的多个翅片和支撑板上的多个强制空气冷却风扇。 前盖包围支撑板的前表面,前盖和翅片形成多个导管,前盖和前表面在翅片下方形成内部开口。 后盖包围支撑板的背面。 第一散热电路模块设置在与前表面上的翅片相邻的位置处。 第二散热电路模块设置在开口内。 当强制风冷风扇工作时,风扇沿着多个管道产生空气流,以冷却第一散热电路模块,并且风扇产生开口内的空气流,以冷却第二散热回路 板。
    • 3. 发明授权
    • Multiplex radio transmitter and multiplex radio transmission method, multiplex radio receiver and multiplex radio receiving method, and multiplex radio transceiver and multiplex transmission/receiving system
    • 多路复用无线电发射机和复用无线电传输方式,复用无线电接收机和复用无线电接收方式,以及复用无线电收发机和多路复用传输/接收系统
    • US06185201B2
    • 2001-02-06
    • US09187386
    • 1998-11-06
    • Hiroyuki KiyanagiToshiaki SuzukiYasuhiro ShibuyaHiroshi Suzuki
    • Hiroyuki KiyanagiToshiaki SuzukiYasuhiro ShibuyaHiroshi Suzuki
    • H04J100
    • H04B1/40H04J1/00
    • The present invention is directed to a multiplex radio transmission/receiving system. The system includes a plurality of transmission sections provided so as to correspond to a plurality of channels, and a plurality of receiving sections provided so as to correspond to the plurality of channels. Each transmission section includes a modulation section, a first frequency conversion section, a first band-pass filter, a second frequency conversion section, and a second band-pass filter. Each receiving section includes a third band-pass filter, a third frequency conversion section, a fourth band-pass filter, a fourth frequency conversion section, and a demodulation section. By selection of an optimum value for a second intermediate frequency of a transmitter and for a third intermediate frequency of a receiver, a group of transmission radio frequencies (RF) signals and a group of local frequency signals are allocated without overlap. As a result, there can be prepared one type of band-pass filter which has broad band-pass characteristics and which is common among the transmission and receiving sections disposed within the multiplex radio transceiver or among repeaters, thus allowing use of common members.
    • 本发明涉及一种多路无线电发射/接收系统。 该系统包括多个发送部分,其被设置为对应于多个信道,并且多个接收部分设置成对应于多个信道。 每个发送部分包括调制部分,第一频率转换部分,第一带通滤波器,第二频率转换部分和第二带通滤波器。 每个接收部分包括第三带通滤波器,第三频率转换部分,第四带通滤波器,第四频率转换部分和解调部分。 通过选择发射机的第二中频和接收机的第三中频的最佳值,分配一组传输射频(RF)信号和一组本地频率信号,而不重叠。 结果,可以制备具有宽带通特性的一种类型的带通滤波器,并且在布置在多路复用无线电收发器内或在转发器之间的发送和接收部分中是共同的,从而允许使用公共的部件。
    • 4. 发明授权
    • Wireless communication apparatus
    • 无线通信装置
    • US06792255B2
    • 2004-09-14
    • US09768679
    • 2001-01-24
    • Yasuhiro ShibuyaKoji HiraiHiroyuki Kiyanagi
    • Yasuhiro ShibuyaKoji HiraiHiroyuki Kiyanagi
    • H04B106
    • H03G3/3036H04W52/34
    • A wireless communication apparatus according to the present invention is composed of a first section for carrying out wireless communication with a multichannel signal and a second section having a plurality of channel units each process a predetermined frequency signal as a channel signal. The wireless communication apparatus is arranged to have a plurality of variable attenuators each provided for corresponding one of the channel signals received from each channel unit of the second section, a combiner for combining outputs from the respective variable attenuators together and outputting the resultant combined signal to the first section, and a control unit for controlling the degree of attenuation of the individual variable attenuators according to the variation of the number of the channel signals. According to the arrangement, the wireless communication apparatus can not only communicate with an opponent station by transmitting a multichannel signal but also effectively suppress negative influence on existing channel even if a new channel unit is additionally provided.
    • 根据本发明的无线通信装置由用于执行与多信道信号的无线通信的第一部分和具有多个信道单元的第二部分组成,每个信道单元各自处理预定的频率信号作为信道信号。 无线通信装置被配置为具有多个可变衰减器,每个可变衰减器被设置用于从第二部分的每个信道单元接收的相应一个信道信号,组合器,用于将来自各个可变衰减器的输出组合在一起,并将所得到的组合信号输出到 第一部分和控制单元,用于根据信道信号的数量的变化来控制各个可变衰减器的衰减程度。 根据该结构,无线通信装置不仅能够通过发送多信道信号与对手站进行通信,而且即使附加地提供新的信道单元,也可以有效地抑制对现有信道的负面影响。
    • 5. 发明授权
    • Wireless communication apparatus
    • 无线通信装置
    • US06871053B2
    • 2005-03-22
    • US09768679
    • 2001-01-24
    • Yasuhiro ShibuyaKoji HiraiHiroyuki Kiyanagi
    • Yasuhiro ShibuyaKoji HiraiHiroyuki Kiyanagi
    • H03G3/30H04B1/40H04B7/005H04B7/208H04B7/26H04W52/04H04W52/34H04W72/04H04W84/08H04B1/06
    • H03G3/3036H04W52/34
    • A wireless communication apparatus according to the present invention is composed of a first section for carrying out wireless communication with a multichannel signal and a second section having a plurality of channel units each process a predetermined frequency signal as a channel signal. The wireless communication apparatus is arranged to have a plurality of variable attenuators each provided for corresponding one of the channel signals received from each channel unit of the second section, a combiner for combining outputs from the respective variable attenuators together and outputting the resultant combined signal to the first section, and a control unit for controlling the degree of attenuation of the individual variable attenuators according to the variation of the number of the channel signals. According to the arrangement, the wireless communication apparatus can not only communicate with an opponent station by transmitting a multichannel signal but also effectively suppress negative influence on existing channel even if a new channel unit is additionally provided.
    • 根据本发明的无线通信装置由用于执行与多信道信号的无线通信的第一部分和具有多个信道单元的第二部分组成,每个信道单元各自处理预定的频率信号作为信道信号。 无线通信装置被配置为具有多个可变衰减器,每个可变衰减器被设置用于从第二部分的每个信道单元接收的相应一个信道信号,组合器,用于将来自各个可变衰减器的输出组合在一起,并将所得到的组合信号输出到 第一部分和控制单元,用于根据信道信号的数量的变化来控制各个可变衰减器的衰减程度。 根据该结构,无线通信装置不仅能够通过发送多信道信号与对手站进行通信,而且即使附加地提供新的信道单元,也可以有效地抑制对现有信道的负面影响。