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    • 64. 发明申请
    • Antenna with High Isolation
    • 天线高隔离
    • US20080309428A1
    • 2008-12-18
    • US12088567
    • 2005-12-29
    • Hae-Won SonWon-Kyu ChoiChan-Soo ShinGil-Young ChoiCheol-Sig Pyo
    • Hae-Won SonWon-Kyu ChoiChan-Soo ShinGil-Young ChoiCheol-Sig Pyo
    • H01P5/16
    • H01P5/18
    • Provided is an antenna with high isolation. The high-isolation antenna has transmission ports of a transmission radiating body and reception ports of a reception radiating body highly isolated from each other by using a quadrature hybrid coupler. The antenna includes: a transmission radiating body having two feed points for transmitting signals; a reception radiating body having two feed points for receiving signals; a transmission hybrid coupler which is connected to the two feed points of the transmission radiating body and transmits transmission signals which have a phase difference of 90° with each other; and a reception hybrid coupler which is connected to the two feed points of the reception radiating body and receives reception signals which have a phase difference of 90° with each other. The signals leaking from the two feed points of the transmission radiating body to the two feed points of the reception radiating body are offset.
    • 提供具有高隔离度的天线。 高隔离天线具有通过使用正交混合耦合器彼此高度隔离的发射辐射体的发送端口和接收辐射体的接收端口。 天线包括:具有用于发送信号的两个馈送点的发射辐射体; 接收辐射体,具有用于接收信号的两个馈送点; 传输混合耦合器,其连接到所述发射辐射体的两个馈电点,并且传输相位差为90°的传输信号; 以及接收混合耦合器,其连接到接收辐射体的两个馈电点,并接收彼此具有90°的相位差的接收信号。 从发送辐射体的两个馈送点泄漏到接收辐射体的两个馈送点的信号被偏移。
    • 65. 发明授权
    • Dual polarization antenna and RFID reader employing the same
    • 采用双极化天线和RFID阅读器
    • US07427955B2
    • 2008-09-23
    • US11297182
    • 2005-12-07
    • Won-Kyu ChoiNak-Seon SeongCheol-Sig PyoJong-Suk Chae
    • Won-Kyu ChoiNak-Seon SeongCheol-Sig PyoJong-Suk Chae
    • H01Q1/38
    • H01Q1/2216H01Q1/22H01Q9/0421H01Q21/065H01Q21/24
    • Provided is a dual polarization antenna realized by using four inverted F-type radiators and a Radio Frequency Identification (RFID) reader employing the dual polarization antenna. The dual polarization antenna includes a ground plate and four inverted F-type radiators set up on the ground plate. Currents of the same phase are fed to the first and second inverted F-type radiators each other. Currents of an inverted phase are fed to the third and fourth inverted F-type radiators each other. The four inverted F-type radiators form an angle of 90° with one another. The first and second inverted F-type radiators radiate electric wave of vertical polarization and the third and fourth inverted F-type radiators radiate electric wave of horizontal polarization. Since the dual polarization antenna has excellent orthogonal and isolation characteristics, the antenna can extend a transmission distance between the reader and the tag and improve a communication quality.
    • 提供了通过使用四个反相F型辐射器实现的双极化天线和采用双极化天线的射频识别(RFID)读取器。 双极化天线包括接地板和设置在接地板上的四个倒F型散热器。 相同相位的电流彼此馈送到第一和第二倒置的F型散热器。 反相的电流相互馈送到第三和第四倒置的F型散热器。 四个倒F型散热器彼此形成90°的角度。 第一和第二倒F型辐射器辐射垂直极化电波,第三和第四反相F型辐射器辐射水平极化电波。 由于双极化天线具有优异的正交和隔离特性,所以天线可以扩展读取器和标签之间的传输距离,并提高通信质量。
    • 68. 发明申请
    • PIFA, RFID tag using the same and antenna impedance adjusting method thereof
    • PIFA,使用其的RFID标签和天线阻抗调整方法
    • US20070046543A1
    • 2007-03-01
    • US11297517
    • 2005-12-07
    • Won-Kyu ChoiNak-Seon SeongCheol-Sig PyoJong-Suk Chae
    • Won-Kyu ChoiNak-Seon SeongCheol-Sig PyoJong-Suk Chae
    • H01Q1/38
    • H01Q9/0421H01Q1/22H01Q9/0442
    • Provided are a Planar Inverted-F Antenna (PIFA), a Radio Frequency Identification (RFID) tag using the PIFA. The present invention miniaturizes the antenna by using a meander line extended from a radiating edge of a radiation antenna and adjusting a resonant frequency of the antenna, and it performs impedance matching by adjusting capacitive reactance of the antenna. Also, it can perform impedance matching by using a stub having a slot formed therein and adjusting inductive reactance and capacitive reactance of the antenna. The present invention miniaturizes the antenna by using a plurality of shorting plates for shorting the radiation patch from a grounding surface and adjusting the resonant frequency of the antenna. The present invention also provides an inexpensive PIFA antenna with an excellent radiation efficiency by forming the radiation patch in the form of metal sheet in the antenna and floating the radiation patch in the air.
    • 提供了使用PIFA的平面倒F天线(PIFA),射频识别(RFID)标签。 本发明通过使用从辐射天线的辐射边缘延伸的曲折线并调整天线的谐振频率来使天线小型化,并且通过调整天线的电容性电抗来执行阻抗匹配。 此外,它可以通过使用其中形成有槽的短截线来进行阻抗匹配,并且调整天线的感抗和电抗。 本发明通过使用多个短路板来使天线小型化,从而使接地面短路放电片并调节天线的谐振频率。 本发明还通过在天线中形成金属片形式的辐射贴片并且将辐射贴片浮在空中来提供具有优异辐射效率的便宜的PIFA天线。