摘要

This letter presents a novel medium-insensitive and dual-polarized chipless RFID tag antenna. The tag consists of nested concentric coplanar square loops, and adjacent loops are connected by two stub lines at the center of the opposite sides, respectively. The structure is designed to obtain the following function relationship between the loop number n and resonant mode number N: N=2(n-1). The proposed tag is magnetic, and the RCS magnitude is insensitive to the medium where it is pasted. The connected coplanar square loop resonators are reused in both vertical (V) and horizontal (H) polarizations to double the encoding capacity within a fixed bandwidth.

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