Author, as appears in the article.: Lazaro, A.; Villarino, R.; Girbau, D.
Department: Enginyeria Electrònica, Elèctrica i Automàtica
URV's Author/s: Girbau Sala, David / Lázaro Guillén, Antonio Ramon / Villarino Villarino, Ramón Maria
Keywords: Affordable and clean energy
Abstract: This paper describes a passive harmonic tag for radio frequency identification (RFID) and wireless sensor applications.The tag uses a dual polarized UHF patch antenna as an input antenna. One of the outputs is connected to a frequency doubler, which consists of a Schottky diode with its output connected to a patch tuned at twice the input frequency. The other output of the input antenna feeds a DC power harvested converter that drives an oscillator whichmodulates its output signal by controlling the bias point of the Schottky diode.The antenna’s output is also used as a humidity sensor. To achieve this, the antenna is loaded with an interdigital capacitor with humidity-dependent capacitance. The antenna is consequently detuned when humidity varies, and therefore the second harmonic power is received. The tag is manufactured using standard fiberglass substrate. The basic theory of harmonic tag operation is described and compared with the standard backscattering approach. Experimental results with a proof of concept using commercial components are presented.
Thematic Areas: Telecommunications Medicina ii Interdisciplinar Geociências Engineering, electrical & electronic Engenharias iv Engenharias iii Electrical and electronic engineering Ciência da computação Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 16875869
Author's mail: antonioramon.lazaro@urv.cat david.girbau@urv.cat ramon.villarino@urv.cat
Author identifier: 0000-0003-3160-5777 0000-0001-7995-5536 0000-0001-9692-8943
Record's date: 2024-11-16
Journal volume: 2014
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://www.hindawi.com/journals/ijap/2014/670345/
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: International Journal Of Antennas And Propagation. 2014 1-11
APA: Lazaro, A.; Villarino, R.; Girbau, D. (2014). A Passive Harmonic Tag for Humidity Sensing. International Journal Of Antennas And Propagation, 2014(), 1-11. DOI: 10.1155/2014/670345
Article's DOI: 10.1155/2014/670345
Entity: Universitat Rovira i Virgili
Journal publication year: 2014
First page: Article ID 670345
Publication Type: Journal Publications
Repositori URV