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    • 5. 发明申请
    • RFID TAG ANTENNA WITH CAPACITIVELY OR INDUCTIVELY COUPLED TUNING COMPONENT
    • RFID标签天线,具有电容或电感耦合调谐元件
    • US20100123553A1
    • 2010-05-20
    • US12621278
    • 2009-11-18
    • Swagata R. BanerjeeRobert A. SainatiRonald D. Jesme
    • Swagata R. BanerjeeRobert A. SainatiRonald D. Jesme
    • H04Q5/22H01Q9/16
    • H01Q9/16H01Q1/2208H01Q7/00H01Q9/30H01Q19/005
    • This disclosure describes RFID tags designed to provide improved impedance matching capabilities. An RFID tag may include a radiating component and a tuning component located on different layers of the RFID tag. The radiating component and tuning component are located proximate to one another to provide a proximate coupling (e.g., an inductive and/or capacitive coupling). In one embodiment, at least a portion of the radiating component of a first layer overlaps at least a portion of the tuning component of a second layer, resulting in a proximate coupling. The tuning component may be used for tuning the antenna, e.g., matching an impedance of the radiating element and an IC chip electrically connected to the tuning component. Because the radiating element does not have to be designed to match impedances, the radiating element may be designed to provide better gain, polarization purity, larger radar cross section or other antenna parameters.
    • 本公开描述了设计用于提供改进的阻抗匹配能力的RFID标签。 RFID标签可以包括位于RFID标签的不同层上的辐射部件和调谐部件。 辐射部件和调谐部件彼此靠近设置以提供近端耦合(例如,电感和/或电容耦合)。 在一个实施例中,第一层的辐射部件的至少一部分与第二层的调谐部件的至少一部分重叠,导致紧密耦合。 调谐组件可用于调谐天线,例如匹配辐射元件的阻抗和与调谐组件电连接的IC芯片。 因为辐射元件不必被设计成匹配阻抗,所以辐射元件可以设计成提供更好的增益,极化纯度,更大的雷达截面或其他天线参数。