13.56MHz RFID阅读器天线的设计

Design of RFID Reader Antenna at 13.56MHz Frequency

RFID技术中阅读器和标签间的非接触通信是通过两个天线线圈间的电磁耦合实现的,因此成功的天线设计是RFID应用成功的关键。为使RFID阅读器在有限功率输出情况下不出现阅读盲区和有效读取较大区域内标签的信息,本文提出了一种新的天线线圈设计方案,即采用多个覆盖较小区域的线圈的串并组合来构成一个覆盖较大区域的天线线圈。采用这种方案设计出来的阅读器天线不仅可以使阅读器具有阅读较大平面区域标签的能力还使阅读器具有阅读立体空间标签的能力。该设计方案具有广阔的应用前景。

Contactless communication between reader and tags is realized by electromagnetic coupling between two antenna coils in Radio-Frequency Identification （RFID） technology, so it is criteria for successful RFID application to having a perfect antenna. In order to have no blind area and read tag＇s information effectively in a large area under the limited power output of RFID reader, a new design scheme of antenna coil is presented in this paper. It combines more coils with covering smaller area to form a antenna with covering bigger area. The reader antenna designed by this scheme can not only read tags within a larger planar area, but also read tags within a cube. This design scheme has wide application future.