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    • 5. 发明申请
    • Dual polarization antenna and RFID reader employing the same
    • 采用双极化天线和RFID阅读器
    • US20060145926A1
    • 2006-07-06
    • 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。
    • 8. 发明授权
    • PIFA and RFID tag using the same
    • PIFA和RFID标签使用相同
    • US07504998B2
    • 2009-03-17
    • US11297687
    • 2005-12-07
    • Won-Kyu ChoiHae-Won SonJe-Hoon YunJi-Hoon BaeCheol-Sig PyoJong-Suk Chae
    • Won-Kyu ChoiHae-Won SonJe-Hoon YunJi-Hoon BaeCheol-Sig PyoJong-Suk Chae
    • H01Q1/38
    • H01Q1/2225H01Q1/22H01Q9/0421H01Q9/045
    • Provided is a planar inverted-F antenna (PIFA) which has a Co-Planar Waveguide (CPW) feeding structure and can be attached to a metal surface, and an RFID tag using the same. The PIFA includes a radiation patch layer; a Co-Planar Waveguide (CPW) feeding layer; a feeding probe; and a short-circuit. The CPW feeding layer includes a feeding means and a ground surface. The feeding probe electrically connects the radiation patch layer and the feeding means and provides a Radio Frequency (RF) signal to be radiated to the radiation patch layer. The short-circuiting means short-circuits the radiation patch layer and the ground surface through the dielectric layer. The PIFA can be applied to a passive RFID tag. Impedance matching between the antenna and the RFID chip is possible. Also, the PIFA can easily control resonant frequency of the antenna and reactance.
    • 提供了具有共平面波导(CPW)馈送结构并且可以附着到金属表面的平面倒F天线(PIFA)和使用其的RFID标签。 PIFA包括辐射贴片层; 共平面波导(CPW)馈电层; 喂食探针; 和短路。 CPW馈送层包括馈送装置和接地表面。 馈送探针将辐射贴片层和馈送装置电连接并提供要辐射到辐射贴片层的射频(RF)信号。 短路装置通过介电层使辐射贴片层和地表面短路。 PIFA可应用于无源RFID标签。 天线和RFID芯片之间的阻抗匹配是可能的。 此外,PIFA可以轻松控制天线的谐振频率和电抗。