Programa del congreso

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Resumen de las sesiones
V.2.3: S.E.: URSI Portugal
Viernes, 15/09/2023:
12:30 - 14:00

Presidente de la sesión: Sérgio Matos, ISCTE-IUL/Instituto de Telecomunicações, Portugal
Presidente de la sesión: Pablo Padilla de la Torre, Universidad de Granada, España
Lugar: Sala 3: García Matos

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12:30 - 12:45

Microwave Breast Imaging using Multistatic System Fabricated on the same Substrate

A. Martins, Raquel1; M. Felício, João1,2; R. Costa, Jorge1,3; A. Fernandes, Carlos1

1Instituto de Telecomunicações, IST, Universidade de Lisboa, Lisboa, Portugal; 2Centro de Investigação Naval (CINAV), Escola Naval, Almada, Portugal; 3ISCTE – Instituto Universitário de Lisboa (ISCTE-IUL), Lisboa, Portugal

Microwave imaging has been investigated as an alternative breast screening technique for allowing the creation of non-invasive, non-ionizing and low-cost systems. This presentation aims to present an overview of the work developed in Instituto de Telecomunicações - Lisbon, related to this area. In particular, it focuses on a multistatic and contactless setup composed of eight Vivaldi antennas fabricated in the same substrate, as well as the challenges and advantages inherent to this type of configuration when compared with monostatic systems. This includes system assembly, interaction between antennas and signal processing complexity.

12:45 - 13:00

Radio Science in experimental plasma Physics in Portugal

Soares Gonçalves, Bruno

Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais 1049-001 Lisboa, Portugal

Radio science is present in several experimental areas of plasma physics and is an essential diagnostic tool for characterising plasma, optimising its formation and controlling the position of the plasma inside machines. Radio frequency (RF) techniques used to probe the plasma underpin an important group of modern measurement diagnostics. The interaction between the electromagnetic (EM) field of the propagating wave and the magnetised plasma leads to changes in its amplitude, phase, polarisation state and spectrum due to propagation near the plasma layers where shear reflection occurs. In this talk several examples of applications in nuclear fusion plasmas and also in the study of re-entry plasmas are shown. It is also shown the use of radio frequency as an essential tool for the production of new materials, giving as an example the production of high quality graphene derivatives.

13:00 - 13:15

Radiowave propagation in rural areas: from radio coverage to remote detection of wildfires

Caldeirinha, Rafael

Polytechnic Institute of Leiria (IPL), Instituto de Telecomunicações (IT), Leiria, Portugal

This presentation aims to give an overview on current research approaches and propagation models for attenuation (and scattering) in vegetation, developed within the research group on “Antennas and Propagation –Lr” of the Instituto de Telecomunicações in Portugal over the past 26 years, along with some results and comparisons with experimental data gathered at varies frequencies, as a result of the group’s strong track record on analytical and experimental studies directed at the characterisation and modelling of vegetation media effects on propagation and radio system design. These include dynamic and wildfire effects, in addition to both active and passive remote detections of wildfires for early fire detection and mission critical communications.

13:15 - 13:30

Reconfigurable Intelligent Surfaces for Communications and Sensing

Pessoa, Luis

Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal

Reconfigurable Intelligent Surfaces (RIS) have captured major attention from the scientific community in the last few years. These planar surfaces with capability to dynamically manipulate incoming electromagnetic waves can encompass reflecting, transmitting and hybrid (with sensing capability) modes of operation, and going from the sub-6GHz to the sub-THz frequency range. In this talk I will review recent progress in RIS technology focusing on electronics-based reconfigurability techniques up to the sub-THz range and discuss several key applications in wireless communications and sensing. I will also address the contributions of European projects TERRAMETA, SUPERIOT and CONVERGE in the RIS field.

13:30 - 13:45

Train Integrity Monitoring using low power wireless sensors

Capitão, Paulo; Pinho, Pedro; B. Carvalho, Nuno

Instituto de Telecomunicações, DETI, Universidade de Aveiro, Portugal

This project’s goal is to create a Wireless Sensor Network (WSN) that can monitor every individual wagon in a train convoy, guaranteeing its integrity with low power consumption. The designed IoT system is composed of devices capable of functioning independently and becoming network nodes, which are placed strategically in each carriage of the train to establish communication among them and collect the monitoring data in a harsh environment as the railway. The network can tolerate individual failures, such as a single node or communication losses, and easily handle nodes leaving or joining the network with little impact. Each one of these devices should use the minimal amount of power possible to operate, although it must support the required monitoring data transmission when enabled. At this stage, the nodes will be powered by an external battery. The device is in a low power state when updating the network elements is unnecessary, extending its lifetime.