公开(公告)号：US20090096696A1

公开(公告)日：2009-04-16

申请号：US11870789

申请日：2007-10-11

申请人： Terrence H. Joyce, JR. ,  Swagatat R. Banerjee ,  William C. Egbert ,  Katherine A. Brown ,  Jaewon Kim ,  William A. Mittelstadt ,  Robert A. Sainati

发明人： Terrence H. Joyce, JR. ,  Swagatat R. Banerjee ,  William C. Egbert ,  Katherine A. Brown ,  Jaewon Kim ,  William A. Mittelstadt ,  Robert A. Sainati

IPC分类号： H01Q9/16

CPC分类号： H01Q1/2225 ,  H01Q1/38 ,  H01Q9/24 ,  H01Q9/26

摘要： In general, the disclosure describes an RFID tag designed such that the tag is both covert and not easily blocked from the interrogation signal by the hand or other body part of a person. In particular, the RFID tag is designed to have a long, narrow aspect that allows placement of the tag in locations on or in a book that are inconspicuous to the casual observer while extending beyond a hand of a person holding the book by the spine on or near a geometry centerline. The RFID tag includes a dipole segment and a loop segment coupled to the dipole segment. The loop segment of the modified dipole antenna provides the antenna with larger signal strength than conventional dipole antennas. Moreover, the conductive loop segment also provides improved impedance matching capabilities to allow the modified dipole antenna to match the impedance of an integrated circuit (IC) chip of the RFID tag.

摘要翻译： 通常，本公开描述了RFID标签，其被设计成使得标签既隐蔽又不容易被人或其他身体部位的询问信号阻止。 特别地，RFID标签被设计成具有长而狭窄的方面，其允许将标签放置在书籍上或书籍中的位置上，这些位置对于偶然的观察者不显眼，同时延伸到通过脊柱拿着书的人的手 或几何中心线附近。 RFID标签包括耦合到偶极子段的偶极段和环段。 改进的偶极子天线的环段为天线提供比常规偶极天线更大的信号强度。 此外，导电环路段还提供改进的阻抗匹配能力，以允许修改的偶极天线匹配RFID标签的集成电路（IC）芯片的阻抗。