Results 1 to 10 of about 1,746,651 (195)

Absorption efficiency of receiving antennas [PDF]

open access: yesIEEE Transactions on Antennas and Propagation, 2005
Udgivelsesdato ...
Andersen, Jørgen Bach, Frandsen, Aksel
openaire   +3 more sources

Optimum Antenna Characteristics for Maximally Harvesting Ambient RF Energy

open access: yesIEEE Open Journal of Antennas and Propagation, 2022
This paper investigates the best antenna characteristics to harvest ambient RF waves maximally. The proposed approach analyzes and compares key design aspects, including multi-polarization, multi-port, multi-band, omnidirectional, quasi-isotropic, and ...
Constant M. A. Niamien
doaj   +1 more source

Band K Satellite Receiver Signal and Radio Locator

open access: yesScientific Journal of Gdynia Maritime University, 2022
The last dozen or so years has seen significant and dynamic development in satellite technologies. Devices using satellites circulating in space for the purposes of general communication have ceased to be the domain of a narrow group of recipients ...
Marian Wnuk
doaj   +1 more source

A Review on Antenna Technologies for Ambient RF Energy Harvesting and Wireless Power Transfer: Designs, Challenges and Applications

open access: yesIEEE 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
doaj   +1 more source

Degrees of Freedom of a K-User Interference Channel in the Presence of an Instantaneous Relay

open access: yesEntropy, 2022
In this paper, we study the degrees of freedom (DoF) of a frequency-selective K-user interference channel in the presence of an instantaneous relay (IR) with multiple receiving and transmitting antennas.
Ali H. Abdollahi Bafghi   +2 more
doaj   +1 more source

Analysis of the Borehole Effect in Borehole Radar Detection

open access: yesSensors, 2020
The directional borehole radar can accurately locate and image the geological target around the borehole, which overcomes the shortcomings that the conventional borehole radar can only detect the depth of the target and the distance from the borehole ...
Wentian Wang   +3 more
doaj   +1 more source

Enhanced Radar Detection in the Presence of Specular Reflection Using a Single Transmitting Antenna and Three Receiving Antennas

open access: yesRemote Sensing, 2023
Radar target echoes undergo fading in the presence of specular reflection, which is adverse to radar detection. To address this problem, this paper proposes a radar detection method that uses a single transmitting antenna and three receiving antennas ...
Yong Yang, Xue-Song Wang
doaj   +1 more source

Optically levitated nanoparticles as receiving antennas for low frequency wireless communication [PDF]

open access: yesPhotoniX
Low-frequency (LF) wireless communications play a crucial role in ensuring anti-interference, long-range, and efficient communication across various environments.
Zhenhai Fu   +15 more
semanticscholar   +1 more source

WBAN Channel Characteristics Between Capsule Endoscope and Receiving Directive UWB On-Body Antennas

open access: yesIEEE Access, 2020
This paper presents a study on the ultra wideband (UWB) radio channel characteristics between a capsule endoscope and a directive on-body antenna in different parts of the small intestine. The study is conducted using a finite integration technique (FIT)
Mariella Särestöniemi   +5 more
semanticscholar   +1 more source

Novel MIMO-SAR system applied for high-speed and high-accuracy deformation measurement

open access: yesThe Journal of Engineering, 2019
As a novel system, multiple-input multiple-output synthetic aperture radar (MIMO-SAR) has achieved rapid development in the past years. Based on the MIMO technique, multiple transmitting and receiving antennas could be utilised to compose a specific ...
Cheng Hu   +4 more
doaj   +1 more source

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