公开(公告)号：US07330664B2

公开(公告)日：2008-02-12

申请号：US10860903

申请日：2004-06-03

申请人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Ho Han ,  Je Soo Ko

发明人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Ho Han ,  Je Soo Ko

IPC分类号： H04B10/04 ,  H04B10/00

CPC分类号： H04B10/505 ,  H04B10/541

摘要： The present invention relates to none return to zero (NRZ) modulation method. The NRZ optical modulation is performed by combining a clock signal and NRZ data at a sending end and signal distortion capable of being generated when the clock signal and the NRZ data are combined is optimized by controlling the magnitude and phase of the clock signal. At the receiving end, the clock signal is extracted by performing narrow band band-pass filtering of the detected optical signal transmitted from a transmitter and data is recovered using the clock signal. Therefore, a receiver structure for clock extraction is simpler, an error rate of data recovery is lower by clearly extracting the clock signal, and transmission distance of the optical signal is longer.

公开(公告)号：US20060110167A1

公开(公告)日：2006-05-25

申请号：US11284497

申请日：2005-11-21

申请人： Wangjoo Lee ,  Hyunwoo Cho ,  SangKyu Lim ,  Ki-Ho Han ,  Je-Soo Ko

发明人： Wangjoo Lee ,  Hyunwoo Cho ,  SangKyu Lim ,  Ki-Ho Han ,  Je-Soo Ko

IPC分类号： H04B10/04

CPC分类号： H04B10/505 ,  H04B10/508 ,  H04L7/0008 ,  H04L7/0075

摘要： Provided are a clock component generating apparatus using an asymmetrical distortion of NRZ (non-return to zero) signal and an optical transmission and reception system employing it. The clock component generation apparatus can make an NRZ optical signal have large clock component by asymmetrically distorting the rising and the falling waveform of the NRZ signal utilized in an optical communication system. This apparatus includes asymmetrical pull-up circuit for producing a pull-up function and pull-down circuit for pull-down function to thereby generate a clock component in the distorted NRZ data signal. The invention may advantageously be applied to an optical transmission and reception system.

摘要翻译： 提供了使用NRZ（不归零）信号的不对称失真的时钟分量生成装置和使用它的光发送和接收系统。 时钟分量生成装置可以通过对在光通信系统中使用的NRZ信号的上升和下降波形进行非对称失真来使得NRZ光信号具有大的时钟分量。 该装置包括用于产生用于下拉功能的上拉功能和下拉电路的非对称上拉电路，从而在失真的NRZ数据信号中产生时钟分量。 本发明可有利地应用于光传输和接收系统。

公开(公告)号：US07123352B2

公开(公告)日：2006-10-17

申请号：US10938078

申请日：2004-09-10

申请人： Ki Ho Han ,  Wangjoo Lee ,  Je Soo Ko

发明人： Ki Ho Han ,  Wangjoo Lee ,  Je Soo Ko

IPC分类号： G01N21/00

CPC分类号： H04B10/07953 ,  H04B10/532 ,  H04J14/02 ,  H04J14/06

摘要： An apparatus and method for monitoring an optical signal are provided. In the apparatus, a polarization adjusting unit converts the state of polarization of an optical signal. A polarization beam splitter splits the optical signal into a first polarization component and a second polarization component perpendicular to each other. An optical intensity measuring unit measures the optical intensity of the first polarization component. A feedback control unit controls the polarization adjusting unit so that the first and second polarization components are aligned to the two axes of the polarization beam splitter. A scrambler scrambles the optical signal input to the transmission optical fiber. According to the apparatus and method, optical signal-to-noise ratio (OSNR) can be measured accurately.

摘要翻译： 提供了一种用于监视光信号的装置和方法。 在该装置中，偏振调整单元转换光信号的偏振状态。 偏振分束器将光信号分离成彼此垂直的第一偏振分量和第二偏振分量。 光强度测量单元测量第一偏振分量的光强度。 反馈控制单元控制偏振调节单元，使得第一和第二偏振分量与偏振分束器的两个轴对准。 加扰器加扰输入到传输光纤的光信号。 根据该装置和方法，可以精确地测量光信噪比（OSNR）。

公开(公告)号：US20050135722A1

公开(公告)日：2005-06-23

申请号：US10971979

申请日：2004-10-22

申请人： Ki-Ho Han ,  Wangjoo Lee ,  Je-Soo Ko

发明人： Ki-Ho Han ,  Wangjoo Lee ,  Je-Soo Ko

IPC分类号： H04B10/00 ,  G02B6/34 ,  G02B6/26

CPC分类号： G02B6/4215 ,  G02B6/2713 ,  G02B6/278

摘要： An apparatus for compensating a polarization mode dispersion including a polarization adjusting means for adjusting polarization states of an optical beam having a differential group delay based on a polarization adjusting feedback control signal; a polarization beam splitting means for splitting principal states of polarization of the adjusted optical beam into a first polarization and a second polarization; a time delaying means for the first polarization based on a time delay feedback control signal; a polarization adjustment controlling means for controlling the polarization adjusting means based on a polarization adjusting feedback control signal; a time delay controlling means for controlling the time delaying means based on a time delay controlling feedback signal; and an electric combining means for combining a time-compensated first polarization and the second polarization transmitted through the optical tap.

摘要翻译： 一种用于补偿偏振模色散的装置，包括：偏振调节装置，用于基于偏振调节反馈控制信号调整具有差分组延迟的光束的偏振状态; 偏振光束分离装置，用于将经调整的光束的主要偏振光分解为第一偏振和第二偏振; 基于时间延迟反馈控制信号的第一极化的时间延迟装置; 极化调整控制装置，用于基于偏振调节反馈控制信号控制偏振调节装置; 时间延迟控制装置，用于基于时间延迟控制反馈信号控制时间延迟装置; 以及用于组合经时间补偿的第一偏振和通过光学抽头传输的第二偏振的电合成装置。

公开(公告)号：US07024058B2

公开(公告)日：2006-04-04

申请号：US10971979

申请日：2004-10-22

申请人： Ki-Ho Han ,  Wangjoo Lee ,  Je-Soo Ko

发明人： Ki-Ho Han ,  Wangjoo Lee ,  Je-Soo Ko

IPC分类号： G02B6/27 ,  G02B6/26 ,  H04J14/02

CPC分类号： G02B6/4215 ,  G02B6/2713 ,  G02B6/278

摘要： An apparatus for compensating a polarization mode dispersion including a polarization adjusting means for adjusting polarization states of an optical beam having a differential group delay based on a polarization adjusting feedback control signal; a polarization beam splitting means for splitting principal states of polarization of the adjusted optical beam into a first polarization and a second polarization; a time delaying means for the first polarization based on a time delay feedback control signal; a polarization adjustment controlling means for controlling the polarization adjusting means based on a polarization adjusting feedback control signal; a time delay controlling means for controlling the time delaying means based on a time delay controlling feedback signal; and an electric combining means for combining a time-compensated first polarization and the second polarization transmitted through the optical tap.

摘要翻译： 一种用于补偿偏振模色散的装置，包括：偏振调节装置，用于基于偏振调节反馈控制信号调整具有差分组延迟的光束的偏振状态; 偏振光束分离装置，用于将经调整的光束的主要偏振光分解为第一偏振和第二偏振; 基于时间延迟反馈控制信号的第一极化的时间延迟装置; 极化调整控制装置，用于基于偏振调节反馈控制信号控制偏振调节装置; 时间延迟控制装置，用于基于时间延迟控制反馈信号控制时间延迟装置; 以及用于组合经时间补偿的第一偏振和通过光学抽头传输的第二偏振的电合成装置。

公开(公告)号：US20080107427A1

公开(公告)日：2008-05-08

申请号：US12004709

申请日：2007-12-21

申请人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Han ,  Je Ko

发明人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Han ,  Je Ko

IPC分类号： H04B10/04

CPC分类号： H04B10/505 ,  H04B10/541

摘要： The present invention relates to none return to zero (NRZ) modulation method. The NRZ optical modulation is performed by combining a clock signal and NRZ data at a sending end and signal distortion capable of being generated when the clock signal and the NRZ data are combined is optimized by controlling the magnitude and phase of the clock signal. At the receiving end, the clock signal is extracted by performing narrow band band-pass filtering of the detected optical signal transmitted from a transmitter and data is recovered using the clock signal. Therefore, a receiver structure for clock extraction is simpler, an error rate of data recovery is lower by clearly extracting the clock signal, and transmission distance of the optical signal is longer.

摘要翻译： 本发明涉及无归零（NRZ）调制方法。 通过组合发送端的时钟信号和NRZ数据并且通过控制时钟信号的幅度和相位来优化当时钟信号和NRZ数据组合时能产生的信号失真来执行NRZ光调制。 在接收端，通过对从发送器发送的检测到的光信号进行窄带带通滤波来提取时钟信号，并且使用时钟信号恢复数据。 因此，用于时钟提取的接收机结构更简单，通过清楚地提取时钟信号，数据恢复的错误率较低，并且光信号的传输距离更长。

公开(公告)号：US20050095002A1

公开(公告)日：2005-05-05

申请号：US10860903

申请日：2004-06-03

申请人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Han ,  Je Ko

发明人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Han ,  Je Ko

IPC分类号： H04B10/04 ,  H04B10/155 ,  H04J14/08 ,  H04L27/00

CPC分类号： H04B10/505 ,  H04B10/541

摘要： The present invention relates to none return to zero (NRZ) modulation method. The NRZ optical modulation is performed by combining a clock signal and NRZ data at a sending end and signal distortion capable of being generated when the clock signal and the NRZ data are combined is optimized by controlling the magnitude and phase of the clock signal. At the receiving end, the clock signal is extracted by performing narrow band band-pass filtering of the detected optical signal transmitted from a transmitter and data is recovered using the clock signal. Therefore, a receiver structure for clock extraction is simpler, an error rate of data recovery is lower by clearly extracting the clock signal, and transmission distance of the optical signal is longer.

摘要翻译： 本发明涉及无归零（NRZ）调制方法。 通过组合发送端的时钟信号和NRZ数据并且通过控制时钟信号的幅度和相位来优化当时钟信号和NRZ数据组合时能产生的信号失真来执行NRZ光调制。 在接收端，通过对从发送器发送的检测到的光信号进行窄带带通滤波来提取时钟信号，并且使用时钟信号恢复数据。 因此，用于时钟提取的接收机结构更简单，通过清楚地提取时钟信号，数据恢复的错误率较低，并且光信号的传输距离更长。

公开(公告)号：US20110175779A1

公开(公告)日：2011-07-21

申请号：US13120425

申请日：2009-05-13

申请人： Jeongho Ju ,  Jae-Ick Choi ,  Wangjoo Lee ,  Dongho Kim

发明人： Jeongho Ju ,  Jae-Ick Choi ,  Wangjoo Lee ,  Dongho Kim

IPC分类号： H01Q19/06

CPC分类号： H01Q21/062 ,  H01Q1/38 ,  H01Q9/26

摘要： Provided are a conductive structure for a high gain antenna and an antenna. A plurality of conductive patterns (512) of the conductive structure are formed on top and bottom surfaces of a dielectric substrate (511) positioned above the antenna and separated from an antenna body (500). A conductive upper structure of the antenna (510) is positioned above the antenna opposite to a ground plane (530) to which the antenna body is fed, separated from the antenna body. A conductive unit structure comprising a plurality of conductive patterns (512) formed on top and bottom surfaces of the dielectric substrate (511) is arranged in a plurality of layers. The conductive structure for a high gain antenna and the antenna can be readily produced by using low cost printed circuit board (PCB) technology, and a gain of the antenna can be increased regardless of a resonance distance between the ground plane of the antenna and the conductive structure disposed above the antenna.

摘要翻译： 提供一种用于高增益天线和天线的导电结构。 导电结构的多个导电图案（512）形成在位于天线上方并与天线体（500）分离的电介质基板（511）的顶表面和底表面上。 天线（510）的导电上部结构位于与天线体相反的天线的上方，天线体与天线体相对，天线体与天线主体分离。 包括形成在电介质基板（511）的顶表面和底表面上的多个导电图案（512）的导电单元结构被布置成多层。 用于高增益天线和天线的导电结构可以通过使用低成本印刷电路板（PCB）技术容易地制造，并且可以增加天线的增益，而不管天线的接地平面与 导电结构设置在天线之上。

公开(公告)号：US20100259345A1

公开(公告)日：2010-10-14

申请号：US12808106

申请日：2008-11-26

申请人： Dongho Kim ,  Wangjoo Lee ,  Jae-Ick Choi

发明人： Dongho Kim ,  Wangjoo Lee ,  Jae-Ick Choi

IPC分类号： H01P3/18

CPC分类号： H01P1/2005 ,  H01Q15/0086

摘要： Provided is an unlimited single-layer metamaterial structure having negative permittivity and negative permeability in a frequency bandwidth desired by a user. The metamaterial structure includes: a dielectric having a single layer structure having a permittivity or a multi-layer structure in which at least one layer has a different permittivity; and a single conductor disposed in the dielectric, wherein the metamaterial structure has a permittivity, a permeability, and a refractivity that have 0 or a negative value in a predetermined frequency band.

摘要翻译： 提供了一种在用户所期望的频带内具有负介电常数和负磁导率的无限单层超材料结构。 超材料结构包括：具有单层结构的电介质，其具有介电常数或多层结构，其中至少一层具有不同的介电常数; 以及布置在电介质中的单个导体，其中超材料结构具有在预定频带中具有0或负值的介电常数，磁导率和折射率。

公开(公告)号：US20110128201A1

公开(公告)日：2011-06-02

申请号：US12953124

申请日：2010-11-23

申请人： Jeong-Ho JU ,  Jae-Ick Choi ,  Wangjoo Lee ,  Dong-Ho Kim

发明人： Jeong-Ho JU ,  Jae-Ick Choi ,  Wangjoo Lee ,  Dong-Ho Kim

IPC分类号： H01Q11/14 ,  H01P11/00

CPC分类号： H01Q15/244 ,  H01Q9/0428 ,  H01Q21/065 ,  Y10T29/49016

摘要： A circularly polarized antenna in a wireless communication system includes: at least one feed antenna positioned at a predetermined point on at least one ground substrate; and a unit antenna having a plurality of conductive structures arranged in a predetermined identical direction on a superstrate positioned at a predetermined distance from above the feed antenna. The plurality of conductive structures and the unit antenna are configured to radiate circularly polarized waves, respectively, when the feed antenna radiates linearly polarized waves.

摘要翻译： 无线通信系统中的圆极化天线包括：位于至少一个接地基板上的预定点处的至少一个馈电天线; 以及具有多个导电结构的单元天线，所述多个导电结构以预定的相同方向布置在位于距馈电天线上方预定距离的覆层上。 多个导电结构和单位天线被配置为当馈电天线辐射线偏振波时分别辐射圆偏振波。