Projecte llegit
Títol: Radiofrequency energy harvesting in the ISM 2.4 GHz band
Estudiants que han llegit aquest projecte:
BENEYTO COPETE, AITOR (data lectura: 13-07-2022)- Cerca aquest projecte a Bibliotècnica
BENEYTO COPETE, AITOR (data lectura: 13-07-2022)Director/a: GASULLA FORNER, MANUEL
Departament: EEL
Títol: Radiofrequency energy harvesting in the ISM 2.4 GHz band
Data inici oferta: 18-11-2021 Data finalització oferta: 18-06-2022
Estudis d'assignació del projecte:
- GR ENG SIS TELECOMUN
| Tipus: Coordinat Títol: Radiofrequency energy harvesting in the ISM 868 MHz band | |
| Lloc de realització: EETAC | |
| Paraules clau: | |
| RF Harvesting, RFID, rectenna, sensor nodes, IoT | |
| Descripció del contingut i pla d'activitats: | |
| Radiofrequency (RF) energy can be harvested in order to power
the nodes of the Internet of Things (IoT) either from the surrounding environment or from dedicated sources. A particular example are RFID tags powered from nearby RF transmitters. Thus, its application is transversal to many applications of the IoT, e.g. in industrial processes, agriculture, logistics, transport vehicles (including planes), etc. A conventional RF harvester is mainly composed a rectenna and a maximum power point tracker (MPPT). The rectena is composed by an antenna, a matching network and a rectifier. This proposal aims to design, simulate, and implement an RF harvester in the ISM 2.4 GHz band. The proposal is open to be discussed with the candidate and partially fitted to his/her abilities, demands and wishes. |
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| Overview (resum en anglès): | |
| Radio frequency energy from the environment can be collected and then converted into a continuous signal to power certain circuits. The device able to perform this conversion is called a "rectenna", an acronym for "rectifier" and "antenna". A rectenna, or conventional rectifier antenna, consists of an antenna, a matching network and a rectifier. Previous studies of the project demonstrate the viability of a rectenna, using printed circuit boards and discrete components, optimized in the 868 MHz ISM band for powers of -10dBm, -20dBm and -30dBm. In this project we study the design and implementation of a rectenna in the 2.4Ghz ISM band to test the efficiency that can be obtained through WiFi signals. First, a theoretical analysis is developed where the parasitic capacitance of the diode is considered, followed by simulations with ADS software to find the optimal values of the ideal inductance and capacitance of the matching network. Once the most efficient values are found, we replace the ideal components with discrete elements and observe a decrease in efficiency. In order to improve the efficiency of the circuit, we investigate the use of microstrip technology to avoid possible limitations produced by the discrete elements and finally implement it in the circuit, replacing the coil by a microstrip that performs the same function. Finally, in order to validate the ADS simulations of the circuits, we fabricated three printed circuit boards for analysis in the EETAC laboratory.
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