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Fusion of Pre/Post-RFID Correction Techniques to Reduce Anomalies
Published in Fei Hu, Qi Hao, Intelligent Sensor Networks, 2012
Peter Darcy, Prapassara Pupunwiwat, Bela Stantic
Electromagnetic pulses emitted from the readers allow the passive tag enough energy to transmit its identification back [4]. In comparison, the semi-passive tag has a battery source attached to it. However, the battery is only utilized to extend the readability range as it will use the reader’s pulse to transmit its information resulting in a shorter life span but increased observation integrity. The final tag is the active tag that utilizes a battery to not only extend its range but also to transmit its identification number. From its heavy reliance of the battery, this tag has the highest cost and shortest life span of all the tags currently available. The active tag also has advanced features not capable by the other types such as communicating with other tags within proximity [2]. Even today, there are novel and emerging technologies to reduce the production cost even further such as the chipless RFID system tags [5,6] and readers [7], which will be integrated into future applications [8,9] such as space exploration [10] and airport baggage tracking [11].
Storage and Warehousing
Published in Sunderesh S. Heragu, Facilities Design, 2022
Chipless RFID technology can be applied to passports, classified documents, checks, currency, and software, thereby preventing their fraudulent use or duplication. It can enhance security, tracking, and control of physical assets and classified documents. Because the ‘taggents’ are relatively inexpensive (a few pennies per ID) and do not require line of sight for identification, they can be embedded on a shipping invoice inside cardboard cartons containing high-value items to ensure there is no theft, tampering, pilferage, or other unauthorized opening of the cartons.
A Novel Kite-Shaped Chipless RFID Tag for Low-Profile Applications
Published in IETE Journal of Research, 2022
Nimra Tariq, Muhammad Ali Riaz, Humayun Shahid, Muhammad Jamil Khan, Yasar Amin, Hannu Tenhunen
The challenge is met by employing a chipless RFID technology that is a suitable alternative to barcode and magnetic card applications [3]. Chipless RFID tags are easy to fabricate and do not employ silicon chips. Data encoding in chipless tags is implemented using either time domain [4] or frequency domain [5]. In time-domain tags, radio frequency waves are used, and the backscattered signal is captured in time-domain that is reflected back to the reader. In frequency-domain based tags, metallic resonant elements are layered over a dielectric substrate. Such geometries can also be printed on a flexible paper substrate using conductive ink, making its deployment possible on a variety of substrates. The resonant elements ensure frequency-selective reflections when a tag is excited using an incident electromagnetic plane wave. The ID generation principle is based on the presence and absence of resonant peaks in the frequency response of the tag, signified as data bits “1” or “0”. Frequency-domain based tags have a minuscule footprint and higher data capacity in comparison to time domain based tags [6].
Design of a Low-profile Chipless RFID tag Using a Grounded Wall
Published in IETE Journal of Research, 2023
Sajjad Tijeri-Mofrad, S. Mohammad-Ali-Nezhad, Amir Hossein Zarif, M. Khorramizadeh
RFID tags are divided in two categories: tags with semiconductor chips and chipless tags. Using semiconductor chips in RFID tags increases their prices. The identification of information storage by chipless RFID is a promising way to decrease tag costs and extend its lifetime. Time-domain (TD) and frequency-domain (FD) tags are two different kinds of chipless RFID tags. FD tags with a high impedance surface (HIS) show excellent characteristics in comparison with TD tags. Each tag is composed of an array with resonant elements, called scatters, which are differently tuned. In a tag spectral signature, each peak represents a logical one and its absence denotes a logical zero [1,2,4].