Results 91 to 100 of about 5,325 (221)

High-power microwave optics for flexible power transmission systems [PDF]

, 1980
A large concave microwave mirror near the transmitter can magnify the apparent size of the Earth as seen from a phased array, and vice versa, permitting a small phased array to be coupled to a small rectenna while preserving the transmission efficiency ...
Drexler, K. E., Sperber, B. R.
core   +1 more source

Flexible Rectenna on an Eco-Friendly Substrate for Application in Next-Generation IoT Devices

Applied Sciences
Globally, there are now more than 19 billion connected Internet of Things (IoT) devices, which are fostering innovation across various sectors, including industry, healthcare, education, energy, and agriculture.
Nikolay Atanasov, Blagovest Atanasov, Gabriela Atanasova   +2 more
doaj   +1 more source

Quad-Band 3D Rectenna Array for Ambient RF Energy Harvesting

International Journal of Antennas and Propagation, 2020
This paper presents a quad-band, 3D mountable rectenna module for ambient energy harvesting. With the aim of powering up Internet of Things (IoT) nodes in practical ambient environments, a hybrid approach of combining power, both at RF and DC, is adopted
Fatima Khalid, Warda Saeed, Nosherwan Shoaib, Muhammad U. Khan, Hammad M. Cheema   +4 more
doaj   +1 more source

Terahertz and Millimetric Rectennas

, 2020
In recent years, the energy market has witnessed increasing demand on green electromagnetic energy resources to meet the next generation devices requirements. While energy harvesting in the lower gigahertz band has witnessed many improvements leading to market-ready solutions, the terahertz harvesting is, still, in an immature state.
openaire   +2 more sources

Rectenna session: Micro aspects [PDF]

Two micro aspects of the rectenna design are addressed: evaluation of the degradation in net rectenna RF to DC conversion efficiency due to power density variations across the rectenna (power combining analysis) and design of Yagi-Uda receiving elements ...
Gutmann, R. J.
core   +1 more source

System performance conclusions [PDF]

The advantages and disadvantages of reducing power levels and using antennas with diameters smaller than 1 Km were evaluated if rectenna costs and land usage requirements become major factors, operating at 5800 megahertz should be considered.
Arndt, G. D.
core   +1 more source

Harmonic Reflection Rectenna for Precise Wireless Power Transfer Antenna Alignment

IEEE Access
This study introduces a highly efficient harmonic reflection (HR) rectenna designed for precise wireless power transfer (WPT) antenna alignment. The proposed HR rectenna not only converts RF signals to DC power but also transmits a second-harmonic signal
Seongick Jo, Jisu Kim, Juntaek Oh
doaj   +1 more source

Large-Scale Multi-Antenna Multi-Sine Wireless Power Transfer

, 2017
Wireless Power Transfer (WPT) is expected to be a technology reshaping the landscape of low-power applications such as the Internet of Things, Radio Frequency identification (RFID) networks, etc.
Clerckx, Bruno, Huang, Yang
core   +1 more source

Wireless Power Transfer via Subterahertz-Wave

Applied Sciences, 2018
Research on wireless power transmission by a rectenna using millimeter waves and subterahertz waves is gaining attention. It is expected that energy harvesters at high frequencies will be developed for use with future 5 G.
Sei Mizojiri, Kohei Shimamura
doaj   +1 more source