4 documents found, page 1 of 1
Arterial access complications in patients with extracorporeal membrane oxygenat...
Nóbrega, Leandro; Dias, Lara; Moura, Tiago; Paz Dias, Pedro; Sousa, Joel; Roncon, Roberto; Mansilha, ArmandoINTRODUCTION: The use of extracorporeal membrane oxygenation (ECMO) has been increasing in recent years. Veno-Arterial ECMO (ECMO-VA) is usually deployed in refractory cardiac failure and is mostly cannulated through the common femoral artery. When present, arterial access complications may have important consequences in these patients. Therefore, this work aims to narratively review the available evidence rega...
High-efficiency D-TV energy harvesting system for low-input power
Moura, Tiago; Carvalho, Nuno; Pinho, PedroIn this work, a high-efficiency radio-frequency energy-harvesting system that takes use of the Portuguese Digital Television signal (750-758 MHz) to obtain DC power is proposed. To be useful, it is optimized to operate at low-power conditions. For the rectifier, three different solutions are presented: a single-series diode, a single-shunt diode, and a voltage-doubler configuration. The efficiency is similar fo...
Design of an efficient D-TV energy harvesting system for low-power applications
Moura, Tiago; Carvalho, Nuno; Pinho, PedroCollect energy from the surroundings is being biased to power-up devices in order to turn them self-sustainable. On the other hand, the spectrum resultant from the telecommunications tends to progressively increase and becomes wide-reaching, constituting an enormous opportunity to energy harvesting. This work aims to contribute with useful trends into the rectifier design to fulfil energy harvesting purposes. T...
Parasitic stacked slot patch antenna for DTT energy harvesting
Moura, Tiago; Brás, Luís; Pinho, Pedro; Carvalho, Nuno; Gonçalves, RicardoIn this paper a rectangular patch antenna with two slots, integrated with a stacked parasitic antenna, is presented. These techniques allow a bandwidth (BW) and gain enhancement, two of the major limitations of traditional patch antennas. The antenna is designed to operate at 754 MHz for energy harvesting applications, from the Portuguese Digital Terrestrial Television (DTT) signal. The measured antenna BW is 2...