Publicação
Design of an electrically small dual-band antenna and PCB for a NB-IoT industrial sensor
| Resumo: | With the progressive evolution of society, the services provided to consumers and companies are increasingly innovative. These aim to provide a better quality of life, solving increasingly complex problems. Thus, there is a need to develop ”intelligent” devices made up of different sensors, capable of analyzing the environment and sending this information to the cloud. In that regard, they need a connectivity solution between them and the digital world. Standardized by the 3rd Generation Partnership Project (3GPP) and introduced in Release 13, Narrowband-IoT (NB-IoT) present a suitable technology for Internet of Things (IoT) devices that have low power consumption, low data throughput, and long-range communication requirements. In order to respect these conditions, it becomes necessary to invest in the development of devices capable of working in remote locations and harsh circumstances. The project in which this dissertation fits also counts, as a requirement, with the limitation in the device’s dimensions. This limitation directly influences the design of the device and the antenna to be integrated into it. The NB-IoT uses the B20 and B3 as operating bands whose frequencies are considerably low, around 800 MHz and 1800 MHz, respectively. In that regard, miniaturization techniques in dual-band antennas had to be applied in order to design antennas with reduced dimensions. Initially, it started with the design of the printed circuit board (PCB) using only electronic components Commercial-Off-The-Shelf (COTS), including the antenna. In the next step, an analysis of the existing antenna models in the literature was carried out to find an antenna that could be adapted to the application’s requirements. One of these model was selected, analyzed and redesigned using the Ansys High-frequency Structure Simulator (HFSS) as a simulation tool to be integrated into the second and last device developed. The device and the corresponding antenna developed outperformed the results obtained by the first COTS device and, consequently, managed to satisfy the project’s requirements. In order to improve the obtained results, corrections to be carried out in a future version were proposed, as well as new antenna topologies to be investigated. |
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| Autores principais: | Ferreira, Bruno Miguel Machado |
| Assunto: | IoT devices PCB antenna Dual-band NB-IoT Dispositivos IoT Antena em PCB Dupla banda Engenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática |
| Ano: | 2021 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | With the progressive evolution of society, the services provided to consumers and companies are increasingly innovative. These aim to provide a better quality of life, solving increasingly complex problems. Thus, there is a need to develop ”intelligent” devices made up of different sensors, capable of analyzing the environment and sending this information to the cloud. In that regard, they need a connectivity solution between them and the digital world. Standardized by the 3rd Generation Partnership Project (3GPP) and introduced in Release 13, Narrowband-IoT (NB-IoT) present a suitable technology for Internet of Things (IoT) devices that have low power consumption, low data throughput, and long-range communication requirements. In order to respect these conditions, it becomes necessary to invest in the development of devices capable of working in remote locations and harsh circumstances. The project in which this dissertation fits also counts, as a requirement, with the limitation in the device’s dimensions. This limitation directly influences the design of the device and the antenna to be integrated into it. The NB-IoT uses the B20 and B3 as operating bands whose frequencies are considerably low, around 800 MHz and 1800 MHz, respectively. In that regard, miniaturization techniques in dual-band antennas had to be applied in order to design antennas with reduced dimensions. Initially, it started with the design of the printed circuit board (PCB) using only electronic components Commercial-Off-The-Shelf (COTS), including the antenna. In the next step, an analysis of the existing antenna models in the literature was carried out to find an antenna that could be adapted to the application’s requirements. One of these model was selected, analyzed and redesigned using the Ansys High-frequency Structure Simulator (HFSS) as a simulation tool to be integrated into the second and last device developed. The device and the corresponding antenna developed outperformed the results obtained by the first COTS device and, consequently, managed to satisfy the project’s requirements. In order to improve the obtained results, corrections to be carried out in a future version were proposed, as well as new antenna topologies to be investigated. |
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