By Nemai Chandra Karmakar, Mohammad Zomorrodi, Chamath Divarathne
Introduces complex high-capacity information encoding and throughput development recommendations for absolutely printable multi-bit Chipless RFID tags and reader systems
The booklet proposes new methods to chipless RFID tag encoding and tag detection that supersede their predecessors in sign processing, tag layout, and reader architectures. The textual content is split into major sections: the 1st part introduces the basics of electromagnetic (EM) imaging at mm-wave band to augment the content material ability of Chipless RFID structures. The EM Imaging via artificial Aperture Radar (SAR) approach is used for facts extraction. the second one part provides a number of shrewdpermanent tag detection recommendations for present chipless RFID platforms. A Multiple-Input and Multiple-Output (MIMO) dependent tag detection strategy improves the spectral potency and raises information bit means. The ebook concludes with a dialogue of ways the MIMO procedure will be mixed with the picture established strategy to introduce an entire resolution with a quick imaging method of chipless RFID structures. The ebook has the next salient features:
- Discusses new methods to chipless RFID tags resembling EM imaging, excessive ability facts encoding, and strong tag detection techniques
- Presents strategies to reinforce info content material potential of tags and trustworthy tag detection for the readers at unlicensed microwave and mm-wave 2.45, 24 and 60 GHz instrumentation, clinical and clinical (ISM) frequency bands
- Includes case stories of real-world applications
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Additional info for Advanced Chipless RFID: MIMO-Based Imaging at 60 GHz - ML Detection
In another work, a stacked multilayer patch antennas is used as an all-pass network to provide more robustness with respect to multipath and clutter interferences . In the proposed theory, instead of relying on an amplitude–frequency response of the multilayer structure, the phase–frequency response is considered. A three-layer structure with an area of 18 × 18 mm2 is able to decode 2 bits of data content based on the simulation results. No measurement of the proposed tag structure was shown.
6 Required 3-dB beamwidth of reader antenna versus reading distance. 7 Antenna aperture size for 1◦ beamwidth. 7. 4, 24, and 60 GHz. 4, 24, and 60 GHz, only the 60 GHz band offers an antenna size that may be practical for a reading distance of 10–50 cm. In frequencies below 60 GHz, the required aperture size of the antenna is much bigger than the reading distance, hence are nonpractical scenario for the tag imaging purpose. This is the main reason that the millimeter-wave band of 60 GHz is selected for the proposed image-based chipless RFID system.
In this pursuit, the system elements and technical requirements are discussed in detail. The proposed approach to the SAR-based EM-imaging technique ❦ ❦ ❦ 18 ❦ INTRODUCTION enhances the content capacity of the chipless systems to a commercial level, for example, EPC Global Class 1 Generation 2 with 64 data bits. A credit card size EM image-based chipless RFID can encode more than 90 data bits at 60 GHz frequency band. Next, the limitation of the conventional SAR is discussed with MIMO system as solution for addressing the drawbacks of the system.