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C. R. Medeiros, Costa, J. R. & C. A. Fernandes (2011). RFID Reader Antennas For Tag Detection in Self-Confined Volumes at UHF. IEEE Antennas and Propagation Magazine. 53 (2), 39-50

C. R. Medeiros et al.,  "RFID Reader Antennas For Tag Detection in Self-Confined Volumes at UHF", in IEEE Antennas and Propagation Magazine, vol. 53, no. 2, pp. 39-50, 2011

@article{medeiros2011_1713935544438,
	author = "C. R. Medeiros and Costa, J. R. and C. A. Fernandes",
	title = "RFID Reader Antennas For Tag Detection in Self-Confined Volumes at UHF",
	journal = "IEEE Antennas and Propagation Magazine",
	year = "2011",
	volume = "53",
	number = "2",
	doi = "10.1109/MAP.2011.5949323",
	pages = "39-50",
	url = "http://www.it.pt/papjourn_pdf_p.asp?ID_PaperJournal=4868"
}

TY  - JOUR
TI  - RFID Reader Antennas For Tag Detection in Self-Confined Volumes at UHF
T2  - IEEE Antennas and Propagation Magazine
VL  - 53
IS  - 2
AU  - C. R. Medeiros
AU  - Costa, J. R.
AU  - C. A. Fernandes
PY  - 2011
SP  - 39-50
SN  - 1045-9243
DO  - 10.1109/MAP.2011.5949323
UR  - http://www.it.pt/papjourn_pdf_p.asp?ID_PaperJournal=4868
AB  - Confinement of the detection region is a critical issue for some important RFID applications, where the coarse location of the object is required along with its identification. In the UHF band, it is a challenge to confine antenna radiation to reasonably sharp interrogation volumes, <10 lambda(3),without resorting to physical barriers. This paper presents a novel approach for RFID reader radiating structures that self-confine tag detection to a desired volume, avoiding undesired readings outside the interrogation volume. The proposed solution simultaneously covers the three world-assigned RFID frequency subbands at UHF. To demonstrate the effectiveness of the solution, the proposed configuration was integrated into bookshelves, a conveyor belt system, and a proximity point reader. Together with an appropriate control application, these form the building blocks of a smart store with automatic inventorying and billing capability. The radiating structure concept was explored by full-wave simulations, and it was validated with both near-field measurements and with tag-reading scores. Short demonstration videos are available online.
ER  -