The tag uses radio-frequency backscattering techniques to encode and transmit the ID-data or measured values, respectively. The resonance frequency of a single DRA on the tag is determined as a peak in its radar cross section. To encode an ID number, the tag is built from several DRAs with...
The conventional backscatter- ing RFID system using continuous wave (CW), however, cannot fulfill this requirement due to its poor distance estimation accuracy and limited operating range. Recently, ultra wideband (UWB) signal emerges as a viable solution for the new generation of backscattering RFID...
The adoption of RFID technology is being embraced in a wide range of applications; including retail industry, supply chain management, anti-counterfeiting, security and transit systems. In recent years, high expectations for the integration of RFID in healthcare scenarios have emerged. By exploiting ...
The space was cleared of physical obstacles that could cause reflections or scattering of the electromagnetic waves, ensuring that the recorded signals mostly originated from the direct backscattering of the tags. This controlled setting is crucial for maintaining the integrity of the data and ensuring...
which transmits the communication by backscattering the incoming signal; however, the communication sensing capability is subject to the power requirements on the transmitter side. When the logic of the components in the sensor is functioning properly, this energy comes from the RF energy at the rec...
In some of these embodiments, the RF energy can include energy in any other related channels, such as in adjacent channels, where tags could be backscattering, responding to a reader's signal in the first channel. Accordingly, the detected RF energy can include noise, signals that are ...
In practice, RFID is widely used in scenarios such as warehouse logistics, library book order finding, airport baggage location tracking, and medical observations [1–5]. Currently, RFID-based positioning technologies are divided into two categories, namely, range-based and non-range-based. Non-...
Time of arrival (TOA) estimation in multipath dense environment for UWB backscattering radio frequency identification (RFID) system is challenging due to the presence of strong clutter. In addition, the backscattering RFID system has peculiar signal tran
Measuring the bandwidth from the RCS response rather than from transmittance is crucial to accurately defining the Q-factor for backscattering scenarios. Therefore, we use the backscattering Q-factor for this study. The design of the Pi-shaped resonator is inspired by the U-shaped resonator, which...
Measuring the bandwidth from the RCS response rather than from transmittance is crucial to accurately defining the Q-factor for backscattering scenarios. Therefore, we use the backscattering Q-factor for this study. The design of the Pi-shaped resonator is inspired by the U-shaped resonator, which...