Banca de DEFESA: REUBER REGIS DE MELO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : REUBER REGIS DE MELO
DATE: 30/10/2020
TIME: 14:00
LOCAL: De reforma remota usando Google Meet
TITLE:

RFID in IoUT Using a Dielectric Attenuation Structure for Application as Moisture Sensor

KEY WORDS:

IoUT, RFID tag, Microstrip antennas, Soil dielectric attenuator, soil moisture sensor.

PAGES: 110
BIG AREA: Engenharias
AREA: Engenharia Elétrica
SUBÁREA: Telecomunicações
SPECIALTY: Teoria Eletromagnetica, Microondas, Propagação de Ondas, Antenas
SUMMARY:

Advances in Internet of Things (IoT) applications have provided the development of new paradigms in this area, such as the Internet of Underground Things (IoUT). Research shows the potential of IoUT systems, mainly in precision agriculture, in which data it’s collected by different devices interconnected in a communication network. These data can facilitate decision-making about the management of agricultural activities. An important component in the architecture of IoUT is Underground Things (UT) responsible for sensing soil parameters, such as temperature and moisture. In view of this, the Radio Frequency Identification (RFID) technology has been shown promising for the development of UTs, mostly due to the ability of RFID tags to operate as sensors. However, the adaptation of wireless communication in IoUT systems for application in underground conditions represents a challenger yet. In this context, the proposal of the work is to develop a UT based on RFID technology for sensing soil moisture. The UT proposed is formed by a rectangular patch microstrip antenna designed to operate at Ultra High Frequency (UHF), connected to a passive UHF RFID tag chip. The RFID tag in buried in the soil and functions as a moisture sensor. To reduce the effects of soil moisture on the RFID tag, the microstrip antenna designed in the systems was encapsulated in a Dielectric Soil Attenuator (DSA). The DSA is formed by multilayers made of natural carnauba wax and applied over the antenna. Simulated and experimental results were analyzed to verify the effectiveness of the DSA on the antenna parameters at different levels of moisture and soil types. Measurements of the Received Signal Strength Indicator (RSSI) were also performed using a UHF RFID reader, and thus, finding a relationship with the moisture present in the soil. The obtained value shows that the DSA reduces variations in the antenna parameters such as gain and reflection coefficient (S11) caused by soil moisture. Statistical analyzes of the RSSI measurements showed that the proposed UT can work as a soil moisture sensor.

BANKING MEMBERS:
Presidente - 1422265 - JOSE PATROCINIO DA SILVA
Interno - 2524053 - ANTONIO LUIZ PEREIRA DE SIQUEIRA CAMPOS
Interno - 1412682 - VICENTE ANGELO DE SOUSA JUNIOR
Externo à Instituição - IDALMIR DE SOUZA QUEIROZ JÚNIOR - UFERSA
Externo à Instituição - ÁDLLER DE OLIVEIRA GUIMARÃES - UFERSA