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    • 5. 发明授权
    • System combining radio frequency transmitter and receiver using circulator and method for canceling transmission signal thereof
    • 使用循环器组合射频发射机和接收机的系统以及用于消除其发射信号的方法
    • US06567648B1
    • 2003-05-20
    • US09656945
    • 2000-09-07
    • Dal AhnJun Seok ParkJong Chul ParkChul Sang YoonWon Jun Kwak
    • Dal AhnJun Seok ParkJong Chul ParkChul Sang YoonWon Jun Kwak
    • H04B144
    • H04B1/525
    • A transmitter/receiver combination system and a transmission signal canceling method for use in a wireless communication system using a single common antenna are provided. The system includes a circulator for receiving an original transmission signal from the transmitter, transmitting the received transmission signal to an antenna without a signal loss, and transmitting a reception signal received from the antenna to other ends without a signal loss, and a transmission signal canceller for dividing the transmission signal input in an attenuated form as much as a predetermined magnitude via the circulator together with the reception signal into two paths, producing two is phase inverted transmission signals with the same magnitude and delay time as those of the original transmission signal, and recombining the produced two transmission signals with each other, to thereby canceling the transmission signal and transmitting only the reception signal to the receiver.
    • 提供了一种在使用单个公共天线的无线通信系统中使用的发射机/接收机组合系统和传输信号消除方法。 该系统包括用于从发射机接收原始发射信号的环行器,将接收到的传输信号发送到天线而不发生信号丢失,并且将从天线接收的接收信号发射到其他端而不发生信号丢失;以及传输信号消除器 为了将通过循环器的衰减形式的衰减形式的输入信号与接收信号一起分成两条路径,产生两个与原始发送信号具有相同幅度和延迟时间的相位反转的发送信号, 并将所产生的两个发送信号彼此重新组合,从而取消发送信号,并将接收信号仅发送到接收机。
    • 8. 发明申请
    • METHOD OF PREPARING SILICA AEROGEL POWDER
    • 制备二氧化硅气泡粉的方法
    • US20120225003A1
    • 2012-09-06
    • US13099936
    • 2011-05-03
    • Young Chul JOUNGMyung Je RoeYoung Jong YooJong Chul ParkHee Jung ChoiMin Woo Kim
    • Young Chul JOUNGMyung Je RoeYoung Jong YooJong Chul ParkHee Jung ChoiMin Woo Kim
    • C01B33/158
    • C01B33/158C01B33/166
    • A method of preparing silica aero-gel powders having a short preparation time and stable preparation processes. In the method, the silica aerogel powders are generated by using a water glass solution, an inorganic acid, an organosilane compound and an organic solvent. The method includes dispersion-solution generating, gelating and solvent exchanging and drying. In the dispersion-solution generating, a dispersion solution is generated by dispersing the water glass solution and the organosilane compound in the organic solvent. In the gelating and solvent exchanging, silica hydrogel is generated by adding the inorganic acid to the dispersion solution and simultaneously performing gelating and solvent-exchanging. In the drying, the silica aerogel powders are generated by drying the silica hydro-gel.
    • 一种制备具有较短制备时间和稳定制备方法的二氧化硅气凝胶粉末的方法。 在该方法中,通过使用水玻璃溶液,无机酸,有机硅烷化合物和有机溶剂来生成二氧化硅气凝胶粉末。 该方法包括分散溶液产生,凝胶化和溶剂交换和干燥。 在分散液生成中,通过将水玻璃溶液和有机硅烷化合物分散在有机溶剂中而产生分散液。 在凝胶化和溶剂交换中,通过向分散液中加入无机酸,同时进行凝胶化和溶剂交换,生成二氧化硅水凝胶。 在干燥过程中,通过干燥二氧化硅水凝胶来生成二氧化硅气凝胶粉末。
    • 9. 发明授权
    • Sodium-intervened superconductor and its manufacturing method
    • 钠介导超导体及其制造方法
    • US6010982A
    • 2000-01-04
    • US222710
    • 1998-12-29
    • Nam Hwi HurJin Tae KimJong Chul ParkYong Ki Park
    • Nam Hwi HurJin Tae KimJong Chul ParkYong Ki Park
    • C04B35/505H01L39/12C04B35/64H01B12/00
    • H01L39/126Y10S505/742Y10S505/78
    • The present invention relates to a sodium-intervened superconductor and its manufacturing method and more particularly, to the sodium-intervened superconductor expressed by the following Formula 1 and its manufacturing method, wherein the superconductor, prepared from a stoichiometric mixture of Y.sub.2 O.sub.3, NaCuO.sub.2, BaCuO.sub.2, Ln.sub.2 O.sub.3 (Ln: lanthanide ion) and CuO under the atmosphere of oxygen, has some advantages in that a) through the use of NaCuO.sub.2, a ternary oxide, as a reactant, the formation of impurities and sodium evaporation may be prevent, and b) through partial substitution of a divalent barium by a trivalent lanthanide group ion, the superconductor is stable in air with a higher critical current density and critical temperature.Formula 1(Na.sub.1-x Y.sub.x)(Ba.sub.1-y Ln.sub.y).sub.2 Cu.sub.3 O.sub.6+.delta.wherein, Ln is a trivalent lanthanide ion other than Ce and Pr; 0.1
    • 本发明涉及钠介导超导体及其制造方法,更具体地说,涉及由下式1及其制造方法表示的钠介导超导体,其中由Y 2 O 3,NaCuO 2,BaCuO 2的化学计量混合物制备的超导体 ,在氧气氛下的Ln2O3(Ln:镧系元素离子)和CuO具有一些优点:a)通过使用三元氧化物NaCuO 2作为反应物,可以防止杂质的形成和钠蒸发,b )通过三价镧系元素离子部分取代二价钡,超导体在空气中稳定,具有较高的临界电流密度和临界温度。 式(Na1-xYx)(Ba1-yLny)2Cu3O6 +δ其中,Ln是Ce和Pr以外的三价镧系元素离子; 0.1