scholarly journals Data Encoding Improvement and Size Reduction of Chipless RFID Tag Using Short-circuit Line Effect and Angle-based Divided Loops

2020 ◽  
Vol 30.8 (147) ◽  
pp. 1-6
Author(s):  
Thanh Huong Nguyen ◽  
◽  
Duc Quang Tran ◽  
Keyword(s):  
Short Circuit ◽  
Flexible Substrate ◽  
Large Data ◽  
Rfid Tag ◽  
Data Encoding ◽  
Chipless Rfid ◽  
Data Density ◽  
Frequency Position ◽  
Structure Dimension ◽  
Electromagnetic Backscattering

This paper focuses on a short circuit and concentric loop effects to improve the structure dimension as well as enhance the ability to encode electromagnetic wave data for chipless RFID tags. The tag is composed of star-shaped rings that are concentrically nested together. The following factors help reduce the tag size: using the phenomenon of electromagnetic backscattering, assessment by the Radar Cross Section (RCS), the antenna-free tag only includes the multi-frequency resonators. By inserting short circuit lines combined with concentric loops, the number of resonant peaks increases exponentially without increasing the tag overall dimension. In addition, by inserting the short circuit lines at different angles between the two consecutive loops, we can adjust the resonant frequency in the frequency bands, thereby changing the value of the bit by shifting the frequency position. The overall dimension of the resulted tag is 13mmx13 mm and the tag is aimed to be a printable tag on the flexible substrate to minimize the fabrication cost. With the 18-vertex star-shaped tag with five concentric loops, this chipless RFID tag can encode up to 16 bits with high resolution and large data density.

scholarly journals On the application of the EM-imaging for chipless RFID tags

2015 ◽  
Vol 2 (2) ◽  
pp. 86-96 ◽  
Author(s):  
M. Zomorrodi ◽  
N.C. Karmakar
Keyword(s):  
Radio Frequency Identification ◽  
Low Cost ◽  
60 Ghz ◽  
Rfid Tag ◽  
High Data ◽  
Data Encoding ◽  
Bending Effect ◽  
Chipless Rfid ◽  
Frequency Identification ◽  
Cost Item

The electromagnetic (EM) imaging technique at mm-band 60 GHz is proposed for data encoding purpose in the chipless Radio Frequency Identification (RFID) systems. The fully printable chipless RFID tag comprises tiny conductive EM polarizers to create high cross-polar radar cross-section. Synthetic aperture radar approach is applied for formation of the tag's EM-image and revealing the tag's content. The achieved high data encoding capacity of 2 bits/cm2in this technique based on a fully printable tag is very convincing for many applications. The system immunity to multipath interference, bending effect, and printing inaccuracy suggests huge potentials for low-cost item tagging. Tags are also readable through a tick paper envelop; hence secure identification is provided by the proposed technique.

Design of High Data Density Chipless RFID Tag Embedded in QR Code

2021 ◽  
pp. 1-1
Author(s):  
Xinchen Wang ◽  
Yonghui Tao ◽  
Johan Siden ◽  
Gang Wang
Keyword(s):  
Qr Code ◽  
Rfid Tag ◽  
High Data ◽  
Chipless Rfid ◽  
Data Density

scholarly journals Size miniaturization of chipless RFID tag using metamaterial structure

2019 ◽  
Vol 15 (2) ◽  
pp. 723
Author(s):  
Mohd Ezwan B. Jalil ◽  
Mohamad Kamal A. Rahim ◽  
Osman B. Ayop ◽  
Noor Asmawati Samsuri
Keyword(s):  
Transmission Lines ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Effective Length ◽  
Metamaterial Structure ◽  
Split Ring ◽  
Rfid Tag ◽  
Complementary Split Ring Resonator ◽  
Chipless Rfid ◽  
Frequency Position

A Chipless RFID based Modified Complementary Split Ring Resonator (MCSRR) with Different Width (DW) which is metamaterial structure is designed using PET substrate (  =3, loss tangent = 0.025 at 2 GHz) to miniaturize effective length size of conventional split ring resonator. The MCSRR structure with DW provides less size about 17% compared with the conventional MCSRR structure. The single MCSRR resonator with different width only requires a frequency range of 12 % of Complementary Split Ring Resonator (CSRR) resonator. The slotted MCSRR resonator is located underneath substrate and within substrate is connected with transmission lines. The insertion loss value of MCSRR resonator is used to encode ID information of chipless RFID with maximizing ID information using Frequency Position technique. The best swapping parameter for encoding ID number information is split gap of both ring compare with other parameter such as spacing between ring and width of ring.

Design of fully printable and configurable chipless RFID tag on flexible substrate

2011 ◽  
Vol 54 (1) ◽  
pp. 226-230 ◽  
Author(s):  
Botao Shao ◽  
Qiang Chen ◽  
Ran Liu ◽  
Li-Rong Zheng
Keyword(s):  
Flexible Substrate ◽  
Rfid Tag ◽  
Chipless Rfid

scholarly journals Compact Printable Inverted-M Shaped Chipless RFID Tag Using Dual-Polarized Excitation

Electronics ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 580 ◽  
Author(s):  
Wazie M. Abdulkawi ◽  
Abdel-Fattah A. Sheta ◽  
Khaled Issa ◽  
Saleh A. Alshebeili
Keyword(s):  
Frequency Band ◽  
Radio Frequency Identification ◽  
Length Variation ◽  
Detection Capability ◽  
Rfid Tag ◽  
Chipless Rfid ◽  
Data Density ◽  
Frequency Identification ◽  
Experimental Errors ◽  
Dual Polarized

A novel and compact dual-polarized (DP) chipless radio-frequency identification (RFID) tag is presented in this paper. This tag can read both vertical and horizontal orientations within its frequency band, which improves the robustness and detection capability of the RFID system. The proposed tag makes use of the slot length variation encoding technique to improve the encoding capacity. This technique can duplicate the encoding capacity, thereby reducing the overall tag size by almost 50%. In particular, the proposed tag has an encoding capacity of 20 bits in the 3–8 GHz frequency band and achieves data density of around 15.15 bits/cm2. Three prototypes are fabricated and tested outside an anechoic chamber. Furthermore, one tag is tested at different distances (10 cm, 30 cm, and 60 cm) from the reader and the measured results are compared. The simulated and measured results are in reasonable agreement, with acceptable shifts at some frequencies due to fabrication and experimental errors.

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