scholarly journals Design of Compact Trapezoidal Bow-Tie Chipless RFID Tag

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Lei Xu ◽  
Kama Huang
Keyword(s):  
Low Cost ◽  
Credit Cards ◽  
Bistatic Radar ◽  
Rfid Tag ◽  
High Data ◽  
Chipless Rfid ◽  
Data Capacity ◽  
Compact Design ◽  
Coding Capacity ◽  
Bow Tie

This paper presents a novel compact design of a low cost fully printable slot-loaded bowtie chipless RFID tag. The tag consists of two trapezoidal metallic patches loaded with multiple slot resonators. Slots with similar size or adjacent frequencies are loaded alternately on two bow-tie patches to double the number of data bits within the UWB frequency band without increasing the mutual coupling between slots. A coding capacity of 12 bits is obtained with 12 slots within a reasonable size of 35 mm×33 mm. RCS of the tag has been given by simulation. Measurements have been done using a bistatic radar configuration in the frequency domain and transmission coefficient is measured. The agreement between the simulation and measurement validates this new concept of design. This tag has high data capacity and low cost and can be directly printed on product such as personal ID, credit cards, paper, and textile because it needs only one conductive layer.

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.

High Data Capacity Chipless RFID Tag Based on Time Domain Scattering Modulation

2021 ◽  
pp. 1-1
Author(s):  
Zhengjie Huang ◽  
Shiwei Dong ◽  
Jiangtao Huangfu ◽  
Lixin Ran ◽  
Dexin Ye
Keyword(s):  
Time Domain ◽  
Rfid Tag ◽  
High Data ◽  
Chipless Rfid ◽  
Data Capacity ◽  
Time Domain Scattering

scholarly journals Miniaturized Chipless RFID Tags Based on Periodically Loaded Microstrip Structure

2019 ◽  
Vol 9 (5) ◽  
pp. 4679-4684
Author(s):  
M. Added ◽  
K. Rabaani ◽  
S. Chabaan ◽  
N. Boulejfen
Keyword(s):  
Radio Frequency Identification ◽  
Low Cost ◽  
Resonant Circuit ◽  
Rfid Tags ◽  
Frequency Range ◽  
Rfid Tag ◽  
Chipless Rfid ◽  
Frequency Identification ◽  
Coding Capacity ◽  
Microstrip Structure

A compact chipless radio frequency identification (RFID) tag-based on slow-wave technology is introduced in this paper. The tag consists of a resonant circuit based on open stub resonators periodically loaded by shunt stubs allowing a coding capacity of 9 bits and operating in a frequency range from 2 to 4GHz. The receiving and transmitting antennas of the tag are particularly designed to minimize the tag size as much as possible. The proposed tag presents a robust bit pattern with a compact and fully printable structure using FR4 substrate for a low-cost tag.

scholarly journals High-Density 3D Printable Chipless RFID Tag with Structure of Passive Slot Rings

Sensors ◽  
2019 ◽  
Vol 19 (11) ◽  
pp. 2535 ◽  
Author(s):  
Zhonghua Ma ◽  
Yanfeng Jiang
Keyword(s):  
Radio Frequency Identification ◽  
Low Cost ◽  
Vertical Direction ◽  
High Sensitivity ◽  
High Density ◽  
Frequency Spectra ◽  
Rfid Tag ◽  
Rectangular Slot ◽  
Chipless Rfid ◽  
Electric Field Direction

A three-dimensional (3D) printable chipless radio frequency identification (RFID) tag, with high density and sensitivity, is proposed and fulfilled on insulator substrates. By printing a rectangular slot ring and designing specific geometry on the substrate, the printed structure shows high sensitivity in a resonant manner, with the benefits of high density and low cost. Considering the multiple rectangular rings with different sizes in a concentric distribution, a bit coding sequence can be observed in frequency spectra because of the corresponding different resonant frequencies aroused by the printed slots. In this way, the 3D printable chipless RFID tag can be fulfilled by adopting the structure of the rectangular slot ring on the insulated substrates. The main characteristics of the designed rectangular slot rings are verified on both flexible and solid substrates. A 12-bit chipless tag based on the slot ring structures is designed and implemented. The simulation and experiment results show good agreement on its characteristics. The frequency response reveals the fact that the 2th, 3th and 4th harmonic do not exist, which is a unique merit for improving the encoding capacity and the sensitivity of the corresponding reader. The electric field direction of the electromagnetic wave of the reader excitation tag is demonstrated to be wide, up to 90° on the tag horizontal plane, 30° on the vertical direction.

Low-Cost Multiple-Bit Encoded Chipless RFID Tag Using Stepped Impedance Resonator

2014 ◽  
Vol 62 (9) ◽  
pp. 4762-4770 ◽  
Author(s):  
C. M. Nijas ◽  
U. Deepak ◽  
P. V. Vinesh ◽  
R. Sujith ◽  
S. Mridula ◽  
...  
Keyword(s):  
Low Cost ◽  
Rfid Tag ◽  
Chipless Rfid ◽  
Stepped Impedance Resonator

scholarly journals High space efficiency compact chipless RFID tag with equidistance resonances

2018 ◽  
Vol 7 (2) ◽  
pp. 609
Author(s):  
Kholoud Ammar ◽  
Amr Hussein ◽  
Mahmoud Attia
Keyword(s):  
Radio Frequency Identification ◽  
Low Cost ◽  
Dual Band ◽  
Spectral Signature ◽  
Radio Waves ◽  
Rfid Tag ◽  
Space Efficiency ◽  
Chipless Rfid ◽  
Resonance Frequencies ◽  
High Space

Radio Frequency Identification (RFID) technology provides non line-of-sight communication between the reader and the tag. This technology is widely used for various applications such as item tracking, security, access control, health care, short and long-range applications. RFID can be used as low cost data identification technology using radio waves between the RFID transmitter and the RFID receiver. Many attempts are introduced to implement the chipless RFID tags but they suffer from non-equal spacing between resonances which makes it difficult to make the decision. In this paper, compact low cost spectral signature based chipless 8-bits RFID tag is introduced. Multi dual-band resonating circuits with different resonances are used. The operation bandwidth is limited by the second resonance of the resonator. To avoid the presence of harmonics in the operating frequency range, multiple resonators with different shapes are introduced. The proposed tag instead of encoding only one data bit it encodes two data bits providing higher bits/resonator. The proposed tag provides equidistance between resonance frequencies. The tag is implemented on FR4 substrate of dielectric constant =4.4, thickness h=1.6mm and loss tangent δ=0.0018. The scattering parameters  of the fabricated tags are measured using the vector network analyzer (ROHDE&SCHWARZ ZVB 20). The designs of the tags are made using the software package CST MICROWAVE STUDIO.

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