RFID tag with electromagnetic wave polarization diversity

Author(s):  
Dan Neculoiu ◽  
Alina-Cristina Bunea
Author(s):  
Magdalene Wan Ching Goh

Electromagnetic theory covers the basic principles of electromagnetism. This chapter explores relationships between electric and magnetic fields. The chapter describes the behaviour of electromagnetic wave. The four sets of Maxwell's equations which underpin the principles of electromagnetism are briefly explained. An illustration on wave polarization and propagation is presented. The author describes the classification of waves according to their wavelengths (i.e. the electromagnetic spectrum).


2014 ◽  
Vol 556-562 ◽  
pp. 3598-3601
Author(s):  
Jin Zu Ji

Four two-ordered basis matrices were introduced to deduct Stokes parameter representing electromagnetic wave polarization. Two of them have algebra features similar to unity and imaginary of complex number, so an exponential function was defined which can easily express some matrix operation such as coordination rotation in 2-dimension. The other 2 basis matrices were also incorporated to deduce the Stokes parameters. The four matrices have some fatigue algebra structure which was incorporated in deduction. The coordinate transformation was converted to some matrix problems and we get a more concise result.


2016 ◽  
Vol 26 (1) ◽  
pp. 17
Author(s):  
Edwin Pineda ◽  
César Pedraza

ABSTRACTThis paper presents a study on the identification of main parameters involved in the on-object gain penalty for RFID Tags when are used over front glass of vehicles. We assess four variables with relevant importance over this penalty: Glass type, polarized film, polarization of the electromagnetic wave, and the tag type. The assessment is performed using experimental tests based in the Design of Experiment technique. From the results, a simplified model to determine the on-object gain penalty is developed.Key words.- ANOVA, DOE, Glass, On-object gain penalty, Penalty factor, Polarized film, RFID, Tag.RESUMENEste documento presenta un estudio sobre la identificación de los principales parámetros que intervienen en el factor de penalidad para Tags RFID cuando son instalados sobre el vidrio frontal de los vehículos. Evaluamos las cuatro variables con importancia relevante sobre este factor de penalidad: Tipo de vidrio, película polarizada, la polarización de la onda electromagnética, y el tipo de tag. La evaluación se realiza mediante pruebas experimentales basadas en la técnica de Diseño Experimental. A partir de los resultados, se logra obtener un modelo simplificado para determinar el factor de penalidad de acuerdo a las variables analizadas.Palabras clave.- ANOVA, DOE, Factor de penalidad, Película polarizada, Penalidad de ganancia en objetos, RFID, TAG, Vidrio.


2016 ◽  
Vol 26 (1) ◽  
pp. 27
Author(s):  
Edwin Pineda ◽  
César Pedraza

ABSTRACTThis paper presents a study on the identification of main parameters involved in the on-object gain penalty for RFID Tags when are used over front glass of vehicles. We assess four variables with relevant importance over this penalty: Glass type, polarized film, polarization of the electromagnetic wave, and the tag type. The assessment is performed using experimental tests based in the Design of Experiment technique. From the results, a simplified model to determine the on-object gain penalty is developed.Key words.- ANOVA, DOE, Glass, On-object gain penalty, Penalty factor, Polarized film, RFID, Tag.RESUMENEste documento presenta un estudio sobre la identificación de los principales parámetros que intervienen en el factor de penalidad para Tags RFID cuando son instalados sobre el vidrio frontal de los vehículos. Evaluamos las cuatro variables con importancia relevante sobre este factor de penalidad: Tipo de vidrio, película polarizada, la polarización de la onda electromagnética, y el tipo de tag. La evaluación se realiza mediante pruebas experimentales basadas en la técnica de Diseño Experimental. A partir de los resultados, se logra obtener un modelo simplificado para determinar el factor de penalidad de acuerdo a las variables analizadas.Palabras clave.- ANOVA, DOE, Factor de penalidad, Película polarizada, Penalidad de ganancia en objetos, RFID, TAG, Vidrio.


Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4485 ◽  
Author(s):  
Massimo Donelli

A radio frequency identifier (RFID) tag sensor for the real time monitoring of cracks in civil engineering building is presented in this work. The RFID tag is equipped with a piezoelectric sensor able to detect small movements of crack in order to prevent collapses of buildings or civil engineering structures. The information is delivered by using the modulated scattering technique (MST) which permits to obtain high operative ranges. The sensor is passive, the power supply is provided by means of a suitable rect-antenna and a Chockcroft-Walton multiplier circuit powered by means of the impinging interrogating electromagnetic wave. A system prototype, operating in the X band at 10 GHz, has been designed fabricated and experimentally assessed in a realistic scenario obtaining promising results.


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