Self-interference cancellation in chipless RFID readers for reading range enhancement

Antayhua, Roddy Romero; Rambo, Carlos R.; Sousa, Francinalva Cordeiro de

doi:10.1109/i2mtc.2018.8409774

Cited by 7 publications

(4 citation statements)

References 20 publications

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“…Using a bistatic configuration helps overcome this and improves the signal-to-noise ratio (SNR) of the received signal. However, bistatic configurations can suffer from misalignment issues and coupling between the two reader antennas [45,69,78,[82][83][84][85][86][87].…”

Section: Chipless Rfid Measurement Approachesmentioning

confidence: 99%

“…However, it should be noted that with the current developments in the design and commercialization of microwave components, relatively low-cost and handheld VNAs have appeared in the market in recent years [110,257]. Software defined radios, which tend to be less expensive than VNAs, and a combination of an RF signal generator and spectrum analyzer have also been used for reading chipless RFID tags [86,187,216,242]. When it comes to custom-designed frequency-domain systems, scalar, homodyne, and superheterodyne architectures have also been reducing read time/system latency, and mitigating selfinterference due to signals from the transmitter leaking into the receiver sub-section of the reader.…”

Section: A Reader Architecture Selectionmentioning

confidence: 99%

“…When it comes to custom-designed frequency-domain systems, scalar, homodyne, and superheterodyne architectures have also been reducing read time/system latency, and mitigating selfinterference due to signals from the transmitter leaking into the receiver sub-section of the reader. By the virtue of lacking phase information, scalar readers also suffer from calibrationbased limitations and high receiver noise power [82,86,186,254,[258][259][260][261][262][263]. In addressing the issue of self-interference, selfinterference cancellation boards [86], an UWB compensation unit based on a polyphase power divider [186,235], a compensation unit based on wideband differential phase shifters [264], and a wideband directive filter have been proposed [260].…”

Section: A Reader Architecture Selectionmentioning

confidence: 99%

“…By the virtue of lacking phase information, scalar readers also suffer from calibrationbased limitations and high receiver noise power [82,86,186,254,[258][259][260][261][262][263]. In addressing the issue of self-interference, selfinterference cancellation boards [86], an UWB compensation unit based on a polyphase power divider [186,235], a compensation unit based on wideband differential phase shifters [264], and a wideband directive filter have been proposed [260]. For the issue of noise, various techniques, such as a moving average filter, has been proposed and implemented on-board the reader [265,266].…”

Section: A Reader Architecture Selectionmentioning

confidence: 99%

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A Review of Chipless RFID Measurement Methods, Response Detection Approaches, and Decoding Techniques

Brinker

Zoughi

2022

IEEE Open J. Instrum. Meas.

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Chipless RFID systems can be considered as a special case of passive RFID systems, where the tag contains no power source and no electronics. Instead, the tag's information is stored in its structure and accessed through its electromagnetic (EM) scattering response. However, robust response detection, which is primarily a function of the measurement method, measurement equipment, and processing method used, is still a major challenge in the chipless RFID field. The consequences of not properly capturing a tag response include, incorrectly assigning an ID or incorrectly reporting a sensing parameter. Due to the criticality of these challenges, this review seeks to provide an overview of the current measurement methods, equipment architectures, and processing methods as they relate to chipless RFID tag response detection and decoding. Since chipless RFID started gaining popularity around 2005, the developments in this area have been focused on three major categories: timedomain, frequency-domain, and spatial-domain systems. Frequency-domain systems have emerged as the most popular among these three categories, and thus, this review focuses on techniques used for these systems.

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