A comparison of this with other reported work is shown in Table 1.

CONCLUSION

A chipless RFID tag operating from 4.5 to 6.2 GHz transmits and recovers multi-bit data. Rectangular shaped resonators increase the bit-encoding capacity. Multi-patch RFID chipless tags use narrowband resonant structures to create notch frequencies. Although 6-bit data is encoded in the proposed tag, a higher capacity data structure can be designed by adding more resonators while maintaining the same operating bandwidth. The low-cost single-sided compact chipless RFID tag can be printed directly on many items.

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