20 documents found, page 1 of 2
Manual - Hearts and Hands Project
Norogrando, Rafaela; Loss, Caroline; Reis, MiriamEste Manual foi desenvolvido para comunicar conceitos e informações complexas de maneira fácil para crianças (a partir do primeiro ciclo). Apresenta atividades que auxiliam na verificação de hábitos de consumo e possibilitam uma revisão na maneira como as pessoas relacionam-se com os objetos, em particular as roupas e acessórios.
Textile antenna for first-person view goggles
André, Luís; Pinho, Pedro; Gouveia, Carolina; Loss, CarolineUnmanned Aerial Vehicles, also known as drones, are vehicles controlled remotely. First-Person View (FPV) technology allows these vehicles to have greater versatility and be more easily piloted. The antennas currently used for video transmission are bulky and uncomfortable, so there is a need for this volume to be reduced to increase portability, being this the focus of the paper. The antenna was developed in t...
Textile antenna for bio-radar embedded in a car seat
Loss, Caroline; Gouveia, Carolina; Salvado, Rita; Pinho, Pedro; Vieira, JoséA bio-radar system is presented for vital signs acquisition, using textile antennas manufactured with a continuous substrate that integrates the ground plane. Textile antennas were selected to be used in the RF (Radio Frequency) front-end, rather than those made of conventional materials, to further integrate the system in a car seat cover and thus streamline the industrial manufacturing process. The developmen...
Textile rectenna for RF energy harvesting
Silva, Fábio; Almeida, Rita; Gouveia, Carolina; Loss, Caroline; Pinho, Pedro; Belo, DanielWearable devices are part of many people’s lives, however the batteries they need are a major limitation. In order to solve this problem, an energy harvesting system was studied and implemented, to replace the battery usage and thus enhance the device portability. It is composed by two antennas, one for transmitting and the other for receiving, and a rectifier circuit. The system was completely developed in tex...
Textile antenna array for bio-radar applications
Gouveia, Carolina; Loss, Caroline; Raida, Zbynek; Lacik, Jaroslav; Pinho, Pedro; Vieira, JoséIn this paper, a 2 x 2 antenna array operating at 5.8 GHz is presented for vital signs acquisition using a radar-based system, also known as bio-radar. Since these non-contact systems have multiple applications, their front-end design should take into account the monitoring environment of each specific application. In this sense, the antenna design has a crucial role to guarantee the proper integration of the f...
Influence of some structural parameters on the dielectric behavior of materials...
Loss, Caroline; Gonçalves, Ricardo; Pinho, Pedro; Salvado, RitaKnowledge of the electromagnetic properties of textile materials is crucial in order to design wearable antennas. Despite the growth of research studies on textile antennas, the accurate characterization of the dielectric properties of the materials is still a challenge due to the intrinsic inhomogeneity and deformability of textiles. In this work, 11 textile materials were characterized using the resonator-bas...
Different antenna designs for non-contact vital signs measurement: a review
Gouveia, Carolina; Loss, Caroline; Pinho, P.; Vieira, JoséCardiopulmonary activity measured through contactless means is a hot topic within the research community. The Doppler radar is an approach often used to acquire vital signs in real time and to further estimate their rates, in a remote way and without requiring direct contact with subjects. Many solutions have been proposed in the literature, using different transceivers and operation modes. Nonetheless, all dif...
Influence of some structural parameters on the dielectric behavior of materials...
Loss, Caroline; Gonçalves, Ricardo; Pinho, Pedro; Salvado, RitaKnowledge of the electromagnetic properties of textile materials is crucial in order to design wearable antennas. Despite the growth of research studies on textile antennas, the accurate characterization of the dielectric properties of the materials is still a challenge due to the intrinsic inhomogeneity and deformability of textiles. In this work, 11 textile materials were characterized using the resonator-bas...
Development of a textile antenna using a continuous substrate integrating the g...
Loss, Caroline; Salvado, Rita; Gonçalves, Ricardo; Pinho, PedroThe exponential growth in the wearable market is boosting the industrialization process of manufacturing textile antennas. The patch of the printed antennas can be easily cut, embroidered or screen printed by machines. The conception of an optimal industrial substrate that meets all the mechanical and electromagnetic requirements is still a challenge. This paper presents a printed textile antenna for ISM band u...
Influence of the laminating manufacturing technique on the S11 parameter of pri...
Loss, Caroline; Salvado, Rita; Gonçalves, Ricardo; Pinho, PedroThis paper describes the influence of the laminating technique normally used to produce printed textile antennas on their return loss (S-11) parameter. The cutting technique and the use of steam on the ironing process of conductive fabrics are considered. The surface roughness and superficial porosity of dielectric materials are analyzed. This paper concludes that despite the unwanted compression applied on the...