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Designing a near-field RFID antenna head for orthogonal performance

The performance of near-field RFID systems can be impacted by the different orientations between the RFID antenna heads and the credentials with which the antenna must interact. Interacting with shelved library books is challenging since the RFID inlays are orthogonal to the plane which is most desirable for RFID interactions. There are a number of commercial solutions that operate by inserting a thin RFID antenna between books in order to achieve the desired coupling. These solutions have a number of drawbacks including poor reliability and low read rates. This paper describes the development of a novel antenna head that is capable of orthogonal credential interaction.