A 32-Bit Single Quadrant Angle-Controlled Chipless Tag for Radio Frequency Identification Applications

Area of Science:

• Electrical Engineering
• Electromagnetics
• Radio-Frequency Identification (RFID)

Background:

• Chipless RFID tags offer a cost-effective alternative to traditional RFID systems.
• Existing chipless tag designs face challenges in achieving high data density and spectral efficiency.
• The development of compact, high-performance chipless RFID tags is crucial for large-scale identification applications.

Purpose of the Study:

• To present a novel 32-bit chipless RFID tag design.
• To demonstrate a frequency domain coding technique for RCS signature encoding.
• To evaluate the tag's performance in terms of code density and spectral efficiency.

Main Methods:

• Design of a unique multiple-arc-type shape for the chipless RFID tag.
• Fabrication of the tag on a low-loss substrate.
• Implementation of a frequency domain coding technique to encode the tag's Radar Cross Section (RCS) signature into a 32-bit code.

Main Results:

• The proposed tag operates in the 4.5-10.9 GHz band and exhibits multiple resonances.
• Achieved a high code density of 9.98 bits/cm² and spectral efficiency of 5 bits/GHz.
• The tag has compact overall dimensions of 17.9 × 17.9 mm².

Conclusions:

• The novel arc-shaped chipless RFID tag effectively encodes a 32-bit identification code.
• The tag's high code density and spectral efficiency make it suitable for large-scale product identification.
• This design represents a significant advancement for future chipless RFID tag systems.