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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...
Transparent antenna applied for RF harvesting applications
Brás, Luís; Pinho, Pedro; Carvalho, NunoWith the tremendous growth and relevance of Internet of Things (IoT) is last years it became a demand to identify, communicate and transfer energy to all objects. These technologies are often desired to be hidden (or transparent) to the human eyes, not only by its aesthetic reasons but also by its reusability of the space which is often crucial. This reasons led to a significant grow in research of transparent ...
Pentagonal parch-excited sectorized antenna for localization systems
Brás, Luís; Carvalho, Nuno Borges; Pinho, PedroA pentagonal patch-excited sectorized antenna (SA) suitable for 2.4-2.5 GHz localization systems was studied and developed. The integration of six patch-excited structures converges into a sectorized antenna called Hive5 that provides gain improvement compared to a patch antenna, maximum variation of 3 dB beam width over the radiation pattern and circular polarization (CP). This antenna is presented and analyze...
A review of antenas for indoor positioning systems
Brás, Luís; Carvalho, Nuno Borges; Pinho, Pedro; Kulas, Lukasz; Nyka, KrzysztofThis paper provides a review of antennas applied for indoor positioning or localization systems. The desired requirements of those antennas when integrated in anchor nodes (reference nodes) are discussed, according to different localization techniques and their performance. The described antennas will be subdivided into the following sections according to the nature of measurements: received signal strength (RS...
A survey of indoor location systems antennas
Brás, LuísIndoor location systems is nowadays a huge area of interest not only at academic but also at industry and commercial level. The correct location of these systems is strongly influenced by antennas performance which can provide gain, bandwidth, polarization and radiation pattern diversity due to large variety of antennas types and formats. The improvement of antennas performance can be greatly improved by the us...