Author, as appears in the article.: Lazaro, A.; Villarino, R.; Girbau, D.

Department: Enginyeria Electrònica, Elèctrica i Automàtica

URV's Author/s: Lázaro Guillén, Antonio Ramon / Villarino Villarino, Ramón Maria

Keywords: Hashtag Etiqueta «#» @uroweb @residentesaeu @infoAeu

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: ramon.villarino@urv.cat antonioramon.lazaro@urv.cat

Author identifier: 0000-0001-9692-8943 0000-0003-3160-5777

Record's date: 2023-02-18

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: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: International Journal Of Antennas And Propagation. Vol.2014 (Article ID 670345):

APA: Lazaro, A.; Villarino, R.; Girbau, D. (2014). A Passive Harmonic Tag for Humidity Sensing. International Journal Of Antennas And Propagation, Vol.2014(Article ID 670345), -. 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