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http://dx.doi.org/10.12673/jant.2021.25.1.90

Design of High-Sensitivity Compact Resonator using Interdigital-Capacitor Structure for Chipless RFID Applications  

Yeo, Junho (School of ICT Convergence, Daegu University)
Lee, Jong-Ig (Department of Applied Electronics Engineering, Dongseo University)
Publication Information
Journal of Advanced Navigation Technology / v.25, no.1, 2021 , pp. 90-95 More about this Journal
Abstract
In this paper, the design method for a high-sensitivity compact resonator for chipless RFID tags is proposed. Proposed high-sensitivity compact resonator uses an interdigital-capacitor structure instead of a capacitor-shaped strip structure in a conventional ELC resonator. The length of the electrode plate of the IDC structure is longer than that of the conventional capacitor-shaped structure, resulting in a larger equivalent capacitance of the resonator. This can lower the resonant peak frequency of the RCS characteristic. Two resonators with the same length of the square loop and the width of the strip are fabricated on an RF-301 substrate with a thickness of 0.8 mm. The experiment results show that the resonant peak frequency and value of the bistatic RCS for the ELC resonator were 4.305 GHz and -30.39 dBsm, whereas those of the proposed IDC resonator were 3.295 GHz and -36.91 dBsm. Therefore, the size of the resonator is reduced by 23.5% based on the measured resonant peak frequency of the RCS characteristic.
Keywords
Compact resonator; High-sensitivity; Chipless RFID; Interditital-capacitor(IDC); Radar cross section(RCS);
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