Please use this identifier to cite or link to this item:
https://doi.org/10.21256/zhaw-3333
Publication type: | Conference paper |
Type of review: | Peer review (abstract) |
Title: | Adaptive carrier supression for UHF RFID using digitally tunable capacitors |
Authors: | Küng, Roland Koller, Marcel |
DOI: | 10.21256/zhaw-3333 |
Proceedings: | Proceedings of the 43rd European Microwave Conference |
Conference details: | 2013 European Microwave Conference, Nuremberg, Germany, 6-10 October 2013 |
Issue Date: | 2013 |
Publisher / Ed. Institution: | IEEE |
ISBN: | 978-2-87487-031-6 |
Language: | English |
Subjects: | RFID; Reader; UHF; Suppression |
Subject (DDC): | 004: Computer science 621.3: Electrical, communications, control engineering |
Abstract: | In UHF (Ultra High Frequency) RFID (Radio Frequency Identification) systems Rx (Receiver) is usually isolated from Tx (Transmitter) by a circulator or a directional coupler. Since tags become more sensitive in order to improve reading distance, the relatively poor isolation of 20dB – 30dB limits the tag to reader link. A way to improve a directional coupler’s isolation is to mismatch the unused port to generate a carrier cancelling signal. In this paper an impedance network using digitally tunable capacitors is proposed. The advantage of this solution is that changes in the system – like antenna characteristics or cable length - can be recalibrated at any time by a controller. Finally an isolation of minimum 47dB for any antenna characteristic (minimum return loss of 18dB) and any cable length was reached. Also an algorithm was implemented on a simple MSP430 controller to find the optimum impedance to minimize carrier leakage. |
URI: | https://ieeexplore.ieee.org/document/6686814 https://digitalcollection.zhaw.ch/handle/11475/16473 |
Fulltext version: | Accepted version |
License (according to publishing contract): | Licence according to publishing contract |
Departement: | School of Engineering |
Organisational Unit: | Institute of Signal Processing and Wireless Communications (ISC) |
Appears in collections: | Publikationen School of Engineering |
Files in This Item:
File | Description | Size | Format | |
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adaptive_carrier_suppression_koller_kueng.pdf | 1.03 MB | Adobe PDF | View/Open |
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Küng, R., & Koller, M. (2013). Adaptive carrier supression for UHF RFID using digitally tunable capacitors. Proceedings of the 43rd European Microwave Conference. https://doi.org/10.21256/zhaw-3333
Küng, R. and Koller, M. (2013) ‘Adaptive carrier supression for UHF RFID using digitally tunable capacitors’, in Proceedings of the 43rd European Microwave Conference. IEEE. Available at: https://doi.org/10.21256/zhaw-3333.
R. Küng and M. Koller, “Adaptive carrier supression for UHF RFID using digitally tunable capacitors,” in Proceedings of the 43rd European Microwave Conference, 2013. doi: 10.21256/zhaw-3333.
KÜNG, Roland und Marcel KOLLER, 2013. Adaptive carrier supression for UHF RFID using digitally tunable capacitors. In: Proceedings of the 43rd European Microwave Conference [online]. Conference paper. IEEE. 2013. ISBN 978-2-87487-031-6. Verfügbar unter: https://ieeexplore.ieee.org/document/6686814
Küng, Roland, and Marcel Koller. 2013. “Adaptive Carrier Supression for UHF RFID Using Digitally Tunable Capacitors.” Conference paper. In Proceedings of the 43rd European Microwave Conference. IEEE. https://doi.org/10.21256/zhaw-3333.
Küng, Roland, and Marcel Koller. “Adaptive Carrier Supression for UHF RFID Using Digitally Tunable Capacitors.” Proceedings of the 43rd European Microwave Conference, IEEE, 2013, https://doi.org/10.21256/zhaw-3333.
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