Results 21 to 30 of about 1,302,382 (255)
Radio-over-fiber using an optical antenna based on Rydberg states of atoms [PDF]
, 2018 We provide an experimental demonstration of a direct fiber-optic link for RF transmission ("radio-over-fiber") using a sensitive optical antenna based on a rubidium vapor cell.
A. Deb, N. Kjærgaard
semanticscholar +1 more source
A Reconfigurable MIMO/UWB MIMO Antenna for Cognitive Radio Applications
IEEE Access, 2019 A novel multi-mode frequency reconfigurable MIMO and an ultrawideband (UWB) MIMO antenna design for cognitive radio applications is proposed in this paper.
Xiongwen Zhao, S. Riaz, S. Geng
semanticscholar +1 more source
Slow Fluid Antenna Multiple Access
IEEE Transactions on Communications, 2023 Fluid antennas offer a novel way to achieve massive connectivity by enabling each user to find a ‘port’ in space where the instantaneous interference undergoes a deep null for multiple access. While this unprecedented capability permits hundreds of users
Kai‐Kit Wong +3 more
semanticscholar +1 more source
IEEE Access, 2019 We demonstrate a Rydberg atom-based sensor embedded in a parallel-plate waveguide (PPWG) for amplitude and phase detection of a radio-frequency (RF) electric field. This embedded atomic sensor is also capable of receiving modulated communications signals.
M. Simons +4 more
semanticscholar +1 more source
A Tutorial on Fluid Antenna System for 6G Networks: Encompassing Communication Theory, Optimization Methods and Hardware Designs [PDF]
IEEE Communications Surveys and TutorialsThe advent of the sixth-generation (6G) networks presents another round of revolution for the mobile communication landscape, promising an immersive experience, robust reliability, minimal latency, extreme connectivity, ubiquitous coverage, and ...
W. New +11 more
semanticscholar +1 more source
CREATION AND APPROBATION OF A LOW-FREQUENCY RADIO ASTRONOMY ANTENNA FOR STUDIES OF OBJECTS OF THE UNIVERSE FROM THE MOON'S FARSIDE [PDF]
Radio Physics and Radio Astronomy, 2021 Purpose: Theoretical and experimental studies of the active antenna – an element of the low-frequency radio telescope antenna array for the future observatory on the farside of the Moon.
I. N. Bubnov +5 more
doaj +1 more source
Impact of Ship Motions on Maritime Radio Links
International Journal of Antennas and Propagation, 2012 The improvement of maritime radio links often requires an increase of emitted power or receiver sensitivity. Another way is to replace the poor antenna gains of traditional surface ship whips by novel antenna structures with directive properties. However,
William Hubert +3 more
doaj +1 more source
IEEE Access, 2022 Radio frequency energy harvesting (RFEH) and wireless power transmission (WPT) are two emerging alternative energy technologies that have the potential to offer wireless energy delivery in the future.
Md. Amanath Ullah +5 more
semanticscholar +1 more source
Power Efficient Resource Allocation for Full-Duplex Radio Distributed Antenna Networks [PDF]
IEEE Transactions on Wireless Communications, 2015 In this paper, we study the resource allocation algorithm design for distributed antenna multiuser networks with full-duplex (FD) radio base stations (BSs), which enable simultaneous uplink and downlink communications.
Derrick Wing Kwan Ng +2 more
semanticscholar +1 more source
ON THE “TREE” VERTICAL ELECTRIC ELF ANTENNA [PDF]
Радиофизика и электроника, 2016 Development of new antennas for reception of radio signals was and remains an actual problem. We model and estimate the efficiency of unusual design of the vertical electric antenna detecting ELF (3…3 000 Hz) radio signals.
E. A. Velichko, A. P. Nickolaenko
doaj +1 more source