FSS inspired polarization insensitive chipless RFID tag

• A polarization insensitive, compact, fully-passive bit encoding structure exhibiting 1 : 1 resonator-to-bit correspondence is presented. Inspired by frequency selective surface (FSS) based microwave absorbers, the structure readily operates as a chipless radio frequency identification (RFID) tag. The unit cell is composed of several concentric hexagonal loops. Finite repetitions of the unit cell constitute the proposed RFID tag in its entirety. The required bit sequence is encoded in the frequency domain by addition or omission of corresponding nested resonant elements. A functional prototype is fabricated on a commercial-grade grounded FR4 substrate, occupying a physical footprint of 23 × 10mm2 while offering a capacity of 14 bits. The proposed tag boasts a minuscule profile, and demonstrates polarization insensitivity as well as stable oblique angular performance.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Keyword

Chipless RFID

Data encoding circuit

Radar cross section

Electromagnetic wave absorption

Encoding (symbols)

Frequency domain analysis

Frequency selective surfaces

Polarization

Signal encoding

Chipless radio frequency identifications (RFID)

Data encoding

Frequency selective surface (FSS)

Functional Prototypes

Microwave absorbers

Polarization insensitivity

Polarization-insensitive

Radio frequency identification (RFID)

Publication and Content Type

ref (subject category)

art (subject category)