Creating and sharing knowledge for telecommunications

ADAM 3D - Additive antenna manufacturing

on 18-12-2018

... Additive manufacturing (AM), or 3D-printing, is bringing a revolution to most engineering areas. It is not just about changing fabrication processes and materials, but more importantly, enabling powerful new concepts and designs not feasible or affordable with traditional manufacturing.

In parallel, the trend towards massive communications will continue, anchored on 5G, linking ever more users, devices and machines. This will involve not only land wireless networks, but constellations of small satellites as well. The envisaged number of cells and consequently number of required antenna urges the developments of effective low-cost solutions for mass-market. Antennas are a key component in wireless systems, and AM will play an important role in making them low cost and more efficient.

In ADAM 3D, a three-year project funded by FCT, a research team from the Antennas and Propagation group of IT in Lisbon is focused on the development of new antenna concepts that benefit from opportunities offered by AM, aiming at different aspects of IoT, mHealth, mobile broadband, satellites and backhaul in 5G.

Mário Figueiredo and José Bioucas-Dias among the “World´s most influential Scientific Minds”

on 16-12-2018

... Recently published by Clarivate Analytics, in this year´s edition of the Highly Cited Researchers list, and for the second time, IT has two of its researchers among the “World´s most influential Scientific Minds”. This year, Mário Figueiredo, who has been a “regular presence” for the last five years, is once again accompanied by José Bioucas-Dias, whose first appearance on the list was in 2015.

Although they are classified in different areas, Geosciences in the case of José Bioucas-Dias and Engineering in the case of Mário Figueiredo, both are part of the Pattern and Immage Analysis group from IT in Lisbon, having already participated in several projects together.

Mário Figueiredo has become a world reference in the research field of image reconstruction computational techniques, relevant to areas such as magnetic resonance imaging for medical diagnosis, or to satellite images. The articles that most contribute to his regular appearance in this listing focus on the development of algorithms that allow solving problems of restoration or reconstruction of signals and images, such as noise removal, restoration of blurred images, etc.

The processing of multiband images (eg. pairs of interferometric radar images and hyperspectral images), obtained from satellite or in the laboratory, have been the focus of José Bioucas-Dias. His research aims to restore or reconstruct high quality images from low quality versions, through processing algorithms. In interferometric radar applications, he has developed algorithms that reconstruct 3-D terrain altitude maps from pairs of radar images acquired by a satellite. In the case of hyperspectral images (images with hundreds or thousands of colors), the algorithms developed by the IT researcher allow, for example, to check which compounds are inside a tablet, to detect certain pathologies or to identify materials accurately. "The scientific innovation resides fundamentally in the models used to formulate the problems of restoration and reconstruction and in the algorithms to estimate the original images", explains Bioucas-Dias.

The list of researchers who are influencing world science focuses only on the highly cited articles, which represent 1% of what is published worldwide in 21 scientific fields. There are 14 Portuguese researchers to appear among the 4000 scientists included in this list, which includes 17 Nobel Prize winners.

Photo credits: Débora Rodrigues/Técnico