Results 51 to 60 of about 13,719,025 (270)

Near-Field Thermal Transistor [PDF]

Physical Review Letters, 2014
Using a block of three separated solid elements, a thermal source and drain together with a gate made of an insulator-metal transition material exchanging near-field thermal radiation, we introduce a nanoscale analog of a field-effect transistor which is able to control the flow of heat exchanged by evanescent thermal photons between two bodies.
Ben-Abdallah, Philippe, Biehs, Svend-Age
openaire   +4 more sources

Optimal E-Field Vector Combination for a Highly Focused Antenna-Array [PDF]

, 2014
A near-field highly focused circular phased-array antenna for 5.8-GHz radio frequency identification (RFID) applications is presented. The electric field (E-field) at the focus is enhanced by a constructive vector combination in a three-dimensional (3-D)
Perallos, Asier, Martinez, R, Sharma, A, Batchelor, John C., Garcia Zuazola, Ignacio Julio, de-Haro Ariet, L   +5 more
core   +1 more source

Near Field Models of Spatially-Fed Planar Arrays and Their Application to Multi-Frequency Direct Layout Optimization for mm-Wave 5G New Radio Indoor Network Coverage

Sensors, 2022
Two near field models for the analysis of spatially fed planar array antennas are presented, compared and applied to a multi-frequency wideband direct layout optimization for mm-Wave 5G new radio (NR) indoor network coverage.
Daniel R. Prado
doaj   +1 more source

The Survey on Near Field Communication [PDF]

Sensors, 2015
Near Field Communication (NFC) is an emerging short-range wireless communication technology that offers great and varied promise in services such as payment, ticketing, gaming, crowd sourcing, voting, navigation, and many others. NFC technology enables the integration of services from a wide range of applications into one single smartphone.
Vedat Coskun, Busra Ozdenizci, Kerem Ok
openaire   +4 more sources

Near-Field Tracking With Large Antenna Arrays: Fundamental Limits and Practical Algorithms [PDF]

IEEE Transactions on Signal Processing, 2021
Applications towards 6G have brought a huge interest towards arrays with a high number of antennas and operating within the millimeter and sub-THz bandwidths for joint communication, sensing, and localization.
A. Guerra, F. Guidi, D. Dardari, P. Djurić   +3 more
semanticscholar   +1 more source

Near-Field Communications: A Comprehensive Survey [PDF]

IEEE Communications Surveys and Tutorials
Multiple-antenna technologies are evolving towards larger aperture sizes, extremely high frequencies, and innovative antenna types. This evolution is fostering the emergence of near-field communications (NFC) in future wireless systems.
Yuanwei Liu, Chongjun Ouyang, Zhao-Jie Wang, Jiaqi Xu, Xidong Mu, A. L. Swindlehurst   +5 more
semanticscholar   +1 more source

Communication Modes With Large Intelligent Surfaces in the Near Field [PDF]

IEEE Access, 2021
This paper proposes a practical method for the definition of communication modes when antennas operate in the near-field region, by realizing ad-hoc beams exploiting the focusing capability of large antennas. The beamspace modeling proposed to define the
Nicoló Decarli, D. Dardari
semanticscholar   +1 more source

Review on near-field detection technology in the biomedical field

Advanced Photonics Nexus, 2023
. We review the recent biomedical detection developments of scanning near-field optical microscopy (SNOM), focusing on scattering-type SNOM, atomic force microscope-based infrared spectroscopy, peak force infrared microscopy, and photo-induced force ...
Xitian Hu, Li Zhou, Xu Wu, Yan Peng
semanticscholar   +1 more source

Near-Earth substorm features from multiple satellite observations [PDF]

, 2008
We investigate a substorm on 3 October 2004 during which 11 satellites were located in near-Earth magnetotail (XGSM > −10 RE). Double Star 1 (TC-1), Cluster, and LANL-97 satellites were closely aligned in the dawn-dusk direction (
A. T. Y. Lui (7591487), M. G. Henderson (7591460), Grocott A, Shen C, Kistler, L., Henderson MG, Alexeev, I., Lui, A. T. Y., Alexeev IV, Lui ATY, Mouikis C, T. L. Zhang (7591511), Fazakerley, A. N., Dunlop, M., Shen, C., Kistler LM, Dunlop, M. W., Zhang, T., Rème, H., Volwerk, M., Henderson, M., Lester, M., Kistler, L. M., Lester M, Alexeev, I. V., Grocott, A., M. Lester (7589660), A. N. Fazakerley (7591259), C. Shen (1630555), Zhang TL, Zhang, T. L., Lui, A., J. K. Shi (7591508), Fazakerley, A., Shi JK, M. Volwerk (7591490), Walsh AP, Adrian Grocott (7590026), Shi, J., Walsh, A., C. Mouikis (7591502), L. M. Kistler (7591505), M. W. Dunlop (7591493), I. V. Alexeev (7591496), Dunlop MW, H. Rème (7591274), Mouikis, C., Henderson, M. G., Volwerk M, Rème H, Walsh, A. P., Shi, J. K., A. P. Walsh (7591499), Fazakerley AN   +53 more
core   +1 more source

Wideband Beamforming for RIS Assisted Near-Field Communications [PDF]

IEEE Transactions on Wireless Communications
A near-field wideband beamforming scheme is investigated for reconfigurable intelligent surface (RIS) assisted multiple-input multiple-output (MIMO) systems, in which a deep learning-based end-to-end (E2E) optimization framework is proposed to maximize ...
Ji Wang, Jian Xiao, Yixuan Zou, Wenwu Xie, Yuanwei Liu   +4 more
semanticscholar   +1 more source