Abstract
A long range UHF RFID tag with a rectangular metallic cavity structure is proposed for various applications with metallic objects. The proposed tag consists of a rectangular metallic cavity structure and a folded dipole antenna which is located on top of the cavity. The tag is designed for Korean UHF RFID band(910~914 ㎒) and the bandwidth, which satisfies the-10 ㏈ input reflection coefficient requirement, is approximately 1.3 %(904~916 ㎒). Measurement demonstrates that the proposed tag shows long reading range up to 15 m when it is placed on a metallic plate.
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