{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"institution":[{"id":[{"id":"https:\/\/ror.org\/03mb6wj31","id-type":"ROR","asserted-by":"publisher"},{"id":"https:\/\/www.isni.org\/000000041937028X","id-type":"ISNI","asserted-by":"publisher"},{"id":"https:\/\/www.wikidata.org\/entity\/Q1640731","id-type":"wikidata","asserted-by":"publisher"}],"name":"Universitat Polit\u00e8cnica de Catalunya","acronym":["UPC"]}],"indexed":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T18:51:51Z","timestamp":1769799111009,"version":"3.49.0"},"reference-count":0,"publisher":"Universitat Polit\u00e8cnica de Catalunya","license":[{"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>Internet of Things (IoT), as broadband network connecting every physical objects, is becoming more widely available in various industrial, medical, home and automotive applications. In such network, the physical devices, vehicles, medical assistance, and home appliances among others are supposed to be embedded by sensors, actuators, radio frequency (RF) antennas, memory, and microprocessors, such that these devices are able to exchange data and connect with other devices in the network. Among other IoT\u2019s pillars, wireless sensor network (WSN) is one of the main parts comprising massive clusters of spatially distributed sensor nodes dedicated for sensing and monitoring environmental conditions. The lifetime of a WSN is greatly dependent on the lifetime of the small sensor nodes, which, in turn, is primarily dependent on energy availability within every sensor node. Predominantly, the main energy source for a sensor node is supplied by a small battery attached to it. In a large WSN with massive number of deployed sensor nodes, it becomes a challenge to replace the batteries of every single sensor node especially for sensor nodes deployed in harsh environments. Consequently, powering the sensor nodes becomes a key limiting issue, which poses important challenges for their practicality and cost.\r\n \r\nTherefore, in this thesis we propose enabling WSN, as the main pillar of IoT, by means of resonant inductive coupling (RIC) wireless power transfer (WPT). In order to enable efficient energy delivery at higher range, high quality factor RIC-WPT system is required in order to boost the magnetic flux generated at the transmitting coil. However, an adaptive front-end is essential for self-tuning the resonant tank against any mismatch in the components values, distance variation, and interference from close metallic objects. Consequently, the purpose of the thesis is to develop and design an adaptive efficient switch-mode front-end for self-tuning in WPT receivers in multiple receiver system.\r\n \r\nThe thesis start by giving background about the IoT system and the technical bottleneck followed by the problem statement and thesis scope. Then, Chapter 2 provides detailed backgrounds about the RIC-WPT system. Specifically, Chapter 2 analyzes the characteristics of different compensation topologies in RIC-WPT followed by the implications of mistuning on efficiency and power transfer capability. Chapter 3 discusses the concept of switch-mode gyrators as a potential candidate for generic variable reactive element synthesis while different potential applications and design cases are provided. Chapter 4 proposes two different self-tuning control for WPT receivers that utilize switch-mode gyrators as variable reactive element synthesis. The performance aspects of control approaches are discussed and evaluated as well in Chapter 4. The development and exploration of more compact front-end for self-tuned WPT receiver is investigated in Chapter 5 by proposing a phase-controlled switched inductor converter. The operation and design details of different switch-mode phase-controlled topologies are given and evaluated in the same chapter. Finally, Chapter 6 provides the conclusions and highlight the contribution of the thesis, in addition to suggesting the related future research topics.<\/jats:p>\n                <jats:p>Internet de las cosas (IoT), como red de banda ancha que interconecta cualquier cosa, se est\u00e1 estableciendo como una tecnolog\u00eda valiosa en varias aplicaciones industriales, m\u00e9dicas, dom\u00f3ticas y en el sector del autom\u00f3vil. En dicha red, los dispositivos f\u00edsicos, los veh\u00edculos, los sistemas de asistencia m\u00e9dica y los electrodom\u00e9sticos, entre otros, incluyen sensores, actuadores, subsistemas de comunicaci\u00f3n, memoria y microprocesadores, de modo que son capaces de intercambiar datos e interconectarse con otros elementos de la red. Entre otros pilares que posibilitan IoT, la red de sensores inal\u00e1mbricos (WSN), que es una de las partes cruciales del sistema, est\u00e1 formada por un conjunto masivo de nodos de sensado distribuidos espacialmente, y dedicados a sensar y monitorizar las condiciones del contexto de las cosas interconectadas. El tiempo de vida \u00fatil de una red WSN depende estrechamente del tiempo de vida de los peque\u00f1os nodos sensores, los cuales, a su vez, dependen primordialmente de la disponibilidad de energ\u00eda en cada nodo sensor. La fuente principal de energ\u00eda para un nodo sensor suele ser una peque\u00f1a bater\u00eda integrada en \u00e9l. En una red WSN con muchos nodos y con una alta densidad, es un desaf\u00edo el reemplazar las bater\u00edas de cada nodo sensor, especialmente en entornos hostiles, como puedan ser en escenarios de Industria 4.0. En consecuencia, la alimentaci\u00f3n de los nodos sensores constituye uno de los cuellos de botella que limitan un despliegue masivo pr\u00e1ctico y de bajo coste. A tenor de estas circunstancias, en esta tesis doctoral se propone habilitar las redes WSN, como pilar principal de sistemas IoT, mediante sistemas de transferencia inal\u00e1mbrica de energ\u00eda (WPT) basados en acoplamiento inductivo resonante (RIC). Con objeto de posibilitar el suministro eficiente de energ\u00eda a mayores distancias, deben aumentarse los factores de calidad de los elementos inductivos resonantes del sistema RIC-WPT, especialmente con el prop\u00f3sito de aumentar el flujo magn\u00e9tico generado por el inductor transmisor de energ\u00eda y su acoplamiento resonante en recepci\u00f3n. Sin embargo, dotar al cabezal electr\u00f3nico que gestiona y condicionada el flujo de energ\u00eda de capacidad adaptativa es esencial para conseguir la autosinton\u00eda autom\u00e1tica del sistema acoplado y resonante RIC-WPT, que es muy propenso a la desinton\u00eda ante desajustes en los par\u00e1metros nominales de los componentes, variaciones de distancia entre transmisor y receptores, as\u00ed como debido a la interferencia de objetos met\u00e1licos. Es por tanto el objetivo central de esta tesis doctoral el concebir, proponer, dise\u00f1ar y validar un sistema de WPT para m\u00faltiples receptores que incluya funciones adaptativas de autosinton\u00eda mediante circuitos conmutados de alto rendimiento energ\u00e9tico, y susceptible de ser integrado en un chip para el condicionamiento de energ\u00eda en cada receptor de forma miniaturizada y desplegable de forma masiva. La tesis empieza proporcionando una revisi\u00f3n del estado del arte en sistemas de IoT destacando el reto tecnol\u00f3gico de la alimentaci\u00f3n energ\u00e9tica de los nodos sensores distribuidos y planteando as\u00ed el foco de la tesis doctoral. El cap\u00edtulo 2 sigue con una revisi\u00f3n cr\u00edtica del statu quo de los sistemas de transferencia inal\u00e1mbrica de energ\u00eda RIC-WPT. Espec\u00edficamente, el cap\u00edtulo 2 analiza las caracter\u00edsticas de diferentes estructuras circuitales de compensaci\u00f3n en RIC-WPT seguido de una descripci\u00f3n cr\u00edtica de las implicaciones de la desinton\u00eda en la eficiencia y la capacidad de transferencia energ\u00e9tica del sistema. El cap\u00edtulo 3 propone y explora el concepto de utilizar circuitos conmutados con funci\u00f3n de girador como potenciales candidatos para la s\u00edntesis de prop\u00f3sito general de elementos reactivos variables sintonizables electr\u00f3nicamente, incluyendo varias aplicaciones y casos de uso. El cap\u00edtulo 4 propone dos alternativas para m\u00e9todos y circuitos de control para la autosinton\u00eda de receptores de energ\u00eda<\/jats:p>","DOI":"10.5821\/dissertation-2117-120987","type":"dissertation","created":{"date-parts":[[2023,8,30]],"date-time":"2023-08-30T01:29:05Z","timestamp":1693358945000},"approved":{"date-parts":[[2018,6,13]]},"source":"Crossref","is-referenced-by-count":0,"title":["On-chip adaptive power management for WPT-Enabled IoT"],"prefix":"10.5821","author":[{"sequence":"additional","affiliation":[]},{"given":"Mohamed Ahmed Saad","family":"Abdelhameed","sequence":"first","affiliation":[]}],"member":"3865","container-title":[],"original-title":[],"deposited":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T06:34:23Z","timestamp":1769754863000},"score":1,"resource":{"primary":{"URL":"https:\/\/hdl.handle.net\/2117\/120987"}},"subtitle":[],"editor":[{"given":"Eduardo Jos\u00e9","family":"Alarc\u00f3n Cot","sequence":"first","affiliation":[]}],"short-title":[],"issued":{"date-parts":[[null]]},"references-count":0,"URL":"https:\/\/doi.org\/10.5821\/dissertation-2117-120987","relation":{},"subject":[]}}