Affiliations: [a] Tama Techno Plaza, Tokyo Metropolitan Industrial Technology Research Institute, Azumatyo, Akishima, Japan | [b] Graduate School of Information Science and Technology, Hokkaido University, Kita-ku, Japan
Correspondence:
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Corresponding author: Yuta Watanabe, Tama Techno Plaza, Tokyo Metropolitan Industrial Technology Research Institute, 3-6-1, Azumatyo 196-0033, Akishima, Japan. E-mail:watanabe.yuta@iri-tokyo.jp
Abstract: This paper discusses the shape optimization of chipless
radio frequency identification (RFID) tags comprising fractal structures. In
the proposed optimization process, scattering electromagnetic waves from a
chipless RFID tag are analyzed using a finite-difference time-domain (FDTD)
method. The shapes of the chipless RFID tags are optimized by a
micro-genetic algorithm (m-GA) to determine the frequencies of the subject
scattering waves, as well as to maximize their associated amplitudes and
quality factors. As such, a self-similar metal line and metal patch
comprising fractal structures are assumed to be a chipless RFID tag. The
optimized tags obtained using the FDTD method and m-GA ultimately maintain
the selective frequencies, high amplitudes, and quality factors of the
scattering electromagnetic waves.
