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    Wireless remote access base station and pico-cell system using the same
    1.
    发明授权
    Wireless remote access base station and pico-cell system using the same 失效
    无线远程接入基站和微微小区系统使用相同

    公开(公告)号：US07653313B2

    公开(公告)日：2010-01-26

    申请号：US11519613

    申请日：2006-09-12

    申请人： Han-Lim Lee ,  Seong-Taek Hwang ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Ho-Deok Jang ,  Sub Hur

    发明人： Han-Lim Lee ,  Seong-Taek Hwang ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Ho-Deok Jang ,  Sub Hur

    IPC分类号： H04B10/00

    CPC分类号： H04B10/25758 ,  H04W4/18 ,  H04W88/04 ,  H04W88/085

    摘要： A wireless remote access base station for converting a downstream optical signal to a downstream radio frequency (RF) signal, transmitting the converted downstream RF signal wirelessly, converting a received upstream RF signal to an upstream optical signal, and transmitting the upstream optical signal is provided. The remote base station includes: an electro-absorption modulator (EAM) for converting a downstream optical signal to a downstream RF signal and an upstream RF signal to an upstream optical signal; an antenna for transmitting the downstream RF signal wirelessly and outputting the upstream RF signal received wirelessly to the EAM; and an amplifier, which is located between the EAM and the antenna, amplifies the downstream RF signal and outputs the amplified downstream RF signal to the antenna.

    摘要翻译： 一种用于将下行光信号转换为下行射频（RF）信号的无线远程接入基站，将经转换的下行RF信号无线发送，将接收的上行RF信号转换为上行光信号，并发送上行光信号 。 远程基站包括：用于将下行光信号转换为下行RF信号的电吸收调制器（EAM），以及将上行RF信号转换为上行光信号; 用于无线地发送下行RF信号并将无线接收的上行RF信号输出到EAM的天线; 并且位于EAM和天线之间的放大器放大下游RF信号，并将放大的下行RF信号输出到天线。

    Wireless remote access base station and pico-cell system using the same
    2.
    发明申请
    Wireless remote access base station and pico-cell system using the same 失效
    无线远程接入基站和微微小区系统使用相同

    公开(公告)号：US20070058978A1

    公开(公告)日：2007-03-15

    申请号：US11519613

    申请日：2006-09-12

    申请人： Han-Lim Lee ,  Seong-Taek Hwang ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Ho-Deok Jang ,  Sub Hur

    发明人： Han-Lim Lee ,  Seong-Taek Hwang ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Ho-Deok Jang ,  Sub Hur

    IPC分类号： H04B10/00

    CPC分类号： H04B10/25758 ,  H04W4/18 ,  H04W88/04 ,  H04W88/085

    摘要： A wireless remote access base station for converting a downstream optical signal to a downstream radio frequency (RF) signal, transmitting the converted downstream RF signal wirelessly, converting a received upstream RF signal to an upstream optical signal, and transmitting the upstream optical signal is provided. The remote base station includes: an electro-absorption modulator (EAM) for converting a downstream optical signal to a downstream RF signal and an upstream RF signal to an upstream optical signal; an antenna for transmitting the downstream RF signal wirelessly and outputting the upstream RF signal received wirelessly to the EAM; and an amplifier, which is located between the EAM and the antenna, amplifies the downstream RF signal and outputs the amplified downstream RF signal to the antenna.

    摘要翻译： 一种用于将下行光信号转换为下行射频（RF）信号的无线远程接入基站，将经转换的下行RF信号无线发送，将接收的上行RF信号转换为上行光信号，并发送上行光信号 。 远程基站包括：用于将下行光信号转换为下行RF信号的电吸收调制器（EAM），以及将上行RF信号转换为上行光信号; 用于无线地发送下行RF信号并将无线接收的上行RF信号输出到EAM的天线; 并且位于EAM和天线之间的放大器放大下游RF信号，并将放大的下行RF信号输出到天线。

    Broad-band log-periodic dipole antenna
    3.
    发明申请
    Broad-band log-periodic dipole antenna 审中-公开
    宽带对数周期偶极天线

    公开(公告)号：US20070182655A1

    公开(公告)日：2007-08-09

    申请号：US11601422

    申请日：2006-11-17

    申请人： Han-Lim Lee ,  Seong-Taek Hwang ,  Sung-Hun Kim ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Jung-Woo Baik

    发明人： Han-Lim Lee ,  Seong-Taek Hwang ,  Sung-Hun Kim ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Jung-Woo Baik

    IPC分类号： H01Q11/10

    CPC分类号： H01Q11/105

    摘要： Disclosed is a broadband log-periodic dipole antenna, which has first and second radiating elements alternately and symmetrically arranged in both surfaces of a dielectric substrate according to the corresponding PCS frequency band, IMT-2000 frequency band, and wireless LAN (IEEE 802, 11a/b) frequency band, so that the first and second radiating elements are alternately supplied with signals to make the impedance matching, thereby producing high gain in each of the resonant frequency bands and preventing the distortion of the radiating patterns owing to the broadband characteristics. The arrangement of the first and second radiating elements in both surfaces of the dielectric substrate considerably also reduces the size of the antenna, thereby facilitating mass production with low cost.

    摘要翻译： 公开了一种宽带对数周期偶极天线，其具有根据相应的PCS频带，IMT-2000频带和无线LAN在电介质基板的两个表面中交替地和对称地布置的第一和第二辐射元件（IEEE 802,11a / b）频带，使得第一和第二辐射元件交替地提供信号以使阻抗匹配，从而在每个谐振频带中产生高增益，并且由于宽带特性而防止辐射图案的失真。 第一和第二辐射元件在电介质衬底的两个表面中的布置显着地减小了天线的尺寸，从而以低成本促进了批量生产。

    Duobinary optical transmitter
    6.
    发明授权
    Duobinary optical transmitter 失效
    双色光发射机

    公开(公告)号：US07215892B2

    公开(公告)日：2007-05-08

    申请号：US10638814

    申请日：2003-08-11

    申请人： Han-Lim Lee ,  Seong-Taek Hwang ,  Hee-Won Cheung ,  Yun-Je Oh ,  Ji-Chai Jeong ,  Byung-Chang Kang

    发明人： Han-Lim Lee ,  Seong-Taek Hwang ,  Hee-Won Cheung ,  Yun-Je Oh ,  Ji-Chai Jeong ,  Byung-Chang Kang

    IPC分类号： H04B10/04

    CPC分类号： H04B10/505 ,  H04B10/5055 ,  H04B10/5167

    摘要： Disclosed is a duobinary optical transmitter, which includes a laser source for outputting light with a predetermined wavelength; a Mach-Zehnder interferometer-type optical intensity modulator for modulating the intensity of the light according to a three-level data signal inputted through a modulation terminal; a low-pass filter for converting an inputted two-level binary data signal into a three-level data signal through an interference among codes; and, a modulator driver/amplifier for amplifying the three-level data signal and then outputting it to the modulation terminal, wherein the overall bandwidth of the low-pass filter, the modulator driver/amplifier, and the optical intensity modulator corresponds to approximately ¼ of the clock frequency of the two-level binary data signal.

    摘要翻译： 公开了一种双向光学发射机，其包括用于输出具有预定波长的光的激光源; 用于根据通过调制端子输入的三电平数据信号来调制光强度的马赫 - 曾德干涉仪型光强度调制器; 低通滤波器，用于通过码之间的干扰将输入的二电平二进制数据信号转换为三电平数据信号; 以及用于放大三电平数据信号然后将其输出到调制终端的调制器驱动器/放大器，其中低通滤波器，调制器驱动器/放大器和光强度调制器的总带宽对应于大约1/4 的二级二进制数据信号的时钟频率。

    Duobinary optical transmission apparatus
    7.
    发明授权
    Duobinary optical transmission apparatus 失效
    双色光传输​​装置

    公开(公告)号：US07224907B2

    公开(公告)日：2007-05-29

    申请号：US10459788

    申请日：2003-06-12

    申请人： Han-Lim Lee ,  Ji-Chai Jeong ,  Yong-Hoon Kim ,  Yun-Je Oh ,  Seong-Taek Hwang

    发明人： Han-Lim Lee ,  Ji-Chai Jeong ,  Yong-Hoon Kim ,  Yun-Je Oh ,  Seong-Taek Hwang

    IPC分类号： H04B10/04 ,  H04B10/12

    CPC分类号： H04B10/505 ,  H04B10/5055 ,  H04B10/508

    摘要： A duobinary optical transmission apparatus is provided to generate duobinary optical signals, without using an electric low-pass-filter (LPF), by restricting a bandwidth of a Mach-Zehnder-interferometer-type optical intensity modulator (MZ MOD). Alternatively, a LPF having a single pole with a single capacitor is implemented instead of an expensive LPF, thereby providing a simple transmitter with a lower production cost in comparison with a transmitter using a conventional electric LPF.

    摘要翻译： 提供双二进制光传输装置，通过限制马赫 - 曾德干涉仪型光强度调制器（MZ MOD）的带宽，而不使用电气低通滤波器（LPF）来产生双二进制光信号。 或者，实现具有单个电容器的单极点的LPF而不是昂贵的LPF，从而与使用常规电气LPF的发射器相比，提供具有较低生产成本的简单发射器。

    Radio frequency switch device
    8.
    发明申请
    Radio frequency switch device 审中-公开
    射频开关装置

    公开(公告)号：US20060189351A1

    公开(公告)日：2006-08-24

    申请号：US11156152

    申请日：2005-06-17

    申请人： Seong-Taek Hwang ,  Jae-Hoon Lee ,  Moon-Il Kim ,  Ji-Chai Jeong ,  Jong-Kuck Son

    发明人： Seong-Taek Hwang ,  Jae-Hoon Lee ,  Moon-Il Kim ,  Ji-Chai Jeong ,  Jong-Kuck Son

    IPC分类号： H04B1/38 ,  H04M1/00

    CPC分类号： H01P1/127 ,  H01P1/15

    摘要： A radio frequency switch is disclosed. The switch includes a plurality of first substrates in which a ground surface is formed on each of the first substrates and a micro-strip line and a semiconductor on/off switch are disposed on a plane surface of the ground surface, a plurality of second substrates in which a ground surface is formed on each of the second substrates and a micro-strip line is disposed on a plan surface of the ground surface, the second substrates being combined with the first substrates so as to cross each other and being electrically connected to the first substrates, and combining means for combining the first and second substrates so as to cross each other.

    摘要翻译： 公开了射频开关。 开关包括多个第一基板，其中在每个第一基板上形成接地表面，并且微带线和半导体开/关开关设置在地表面的平面上，多个第二基板 其中在所述第二基板的每一个上形成接地表面，并且在所述接地表面的平面表面上设置微带线，所述第二基板与所述第一基板结合以彼此交叉并且电连接到 第一基板和用于组合第一和第二基板以便彼此交叉的组合装置。

    Return-to-zero optical transmission device
    9.
    发明申请
    Return-to-zero optical transmission device 审中-公开
    归零光传输设备

    公开(公告)号：US20050069331A1

    公开(公告)日：2005-03-31

    申请号：US10833850

    申请日：2004-04-28

    申请人： Jae-Hoon Lee ,  Seong-Taek Hwang ,  Sung-Bum Park ,  Ji-Chai Jeong

    发明人： Jae-Hoon Lee ,  Seong-Taek Hwang ,  Sung-Bum Park ,  Ji-Chai Jeong

    IPC分类号： G02F1/33 ,  H04B10/04 ,  H04B10/155

    CPC分类号： H04B10/505 ,  H04B10/5055 ,  H04B10/508

    摘要： Disclosed is a return-to-zero (RZ) optical transmission device. A light source outputs a carrier wave. A precoder encodes an inputted non-return-to-zero (NRZ) electrical signal. A delay element delays the encoded signal. A Mach-Zehnder interferometer modulator has two electrodes. The Mach-Zehnder interferometer modulator configured to modulate phase and intensity of the carrier wave using respective output signals of the precoder the delay element applied, and output an RZ optical signal.

    摘要翻译： 公开了一种归零（RZ）光传输装置。 光源输出载波。 预编码器对输入的不归零（NRZ）电信号进行编码。 延迟元件延迟编码信号。 马赫 - 曾德干涉仪调制器有两个电极。 马赫 - 策德尔干涉仪调制器被配置为使用预编码器的各个输出信号来调制载波的相位和强度，并且输出RZ光信号。

    Radio over fiber link apparatus of time division duplex scheme
    10.
    发明授权
    Radio over fiber link apparatus of time division duplex scheme 有权
    时分双工方式的光纤链路装置无线电

    公开(公告)号：US08041222B2

    公开(公告)日：2011-10-18

    申请号：US11953911

    申请日：2007-12-11

    申请人： Han-Lim Lee ,  Hoon Kim ,  Seong-Taek Hwang

    发明人： Han-Lim Lee ,  Hoon Kim ,  Seong-Taek Hwang

    IPC分类号： H04B10/00

    CPC分类号： H04J14/02 ,  H04B10/25758 ,  H04W88/085

    摘要： A radio over fiber link apparatus for transmitting/receiving radio frequency up/downlink signals in a TDD mobile communication system. The radio over fiber link apparatus includes a center site for receiving radio frequency signals from an access point of the mobile communication system. The center site has a first electro-optic converter for converting the radio frequency signals into optical signals, bias control of the first electro-optic converter being performed based on the switching of TDD signals; and a remote for transmitting the radio frequency signals to a mobile communication terminal through an antenna. The remote site has a first photoelectric converter for converting the optical signals transmitted through an optical fiber from the center site into radio frequency signals.

    摘要翻译： 一种用于在TDD移动通信系统中发送/接收射频上行/下行链路信号的无线电光纤链路装置。 光纤链路装置的无线电装置包括用于从移动通信系统的接入点接收射频信号的中心站点。 中心站点具有用于将射频信号转换为光信号的第一电光转换器，基于TDD信号的切换执行第一电光转换器的偏置控制; 以及用于通过天线将射频信号发送到移动通信终端的遥控器。 远程站点具有第一光电转换器，用于将通过光纤传输的光信号从中心位置转换成射频信号。