Results 31 to 40 of about 545,717 (377)

Design of a 2-Bit Reconfigurable UWB Planar Antenna Array for Beam Scanning Application

open access: yesIEEE Open Journal of Antennas and Propagation, 2023
Reconfigurable antennas have been widely employed for beam scanning in recent years. However, such antennas are usually limited by narrow bandwidth. To overcome this challenge, we present a linearly polarized 2-bit ultra-wideband (UWB) antenna array in C-
Zuqi Fang   +6 more
doaj   +1 more source

Very compact millimeter sizes for composite star-forming/AGN submillimeter galaxies [PDF]

open access: yes, 2017
We report the study of far-IR sizes of submillimeter galaxies (SMGs) in relation to their dust-obscured star formation rate (SFR) and active galactic nuclei (AGN) presence, determined using mid-IR photometry. We determined the millimeter-wave ($\lambda_{\
Aretxaga, Itziar   +22 more
core   +3 more sources

Millimeter Wave Mobile Communications for 5G Cellular: It Will Work!

open access: yesIEEE Access, 2013
The global bandwidth shortage facing wireless carriers has motivated the exploration of the underutilized millimeter wave (mm-wave) frequency spectrum for future broadband cellular communication networks.
T. Rappaport   +9 more
semanticscholar   +1 more source

Compressed Channel Estimation for Intelligent Reflecting Surface-Assisted Millimeter Wave Systems

open access: yesIEEE Signal Processing Letters, 2020
In this letter, we consider channel estimation for intelligent reflecting surface (IRS)-assisted millimeter wave (mmWave) systems, where an IRS is deployed to assist the data transmission from the base station (BS) to a user.
Peilan Wang   +3 more
semanticscholar   +1 more source

Toward Millimeter-Wave Joint Radar Communications: A signal processing perspective [PDF]

open access: yesIEEE Signal Processing Magazine, 2019
Synergistic design of communications and radar systems with common spectral and hardware resources is heralding a new era of efficiently utilizing a limited radio-frequency (RF) spectrum.
K. Mishra   +4 more
semanticscholar   +1 more source

Contactless Electrocardiogram Monitoring With Millimeter Wave Radar [PDF]

open access: yesIEEE Transactions on Mobile Computing, 2021
The electrocardiogram (ECG) has always been an important biomedical test to diagnose cardiovascular diseases. Current approaches for ECG monitoring are based on body attached electrodes leading to uncomfortable user experience. Therefore, contactless ECG
Jinbo Chen   +5 more
semanticscholar   +1 more source

Millimeter Wave Communications for Future Mobile Networks [PDF]

open access: yesIEEE Journal on Selected Areas in Communications, 2017
Millimeter wave (mmWave) communications have recently attracted large research interest, since the huge available bandwidth can potentially lead to the rates of multiple gigabit per second per user.
Ming Xiao   +10 more
semanticscholar   +1 more source

Coverage and Rate Analysis for Millimeter-Wave Cellular Networks [PDF]

open access: yesIEEE Transactions on Wireless Communications, 2014
Millimeter wave (mmWave) holds promise as a carrier frequency for fifth generation cellular networks. Because mmWave signals are sensitive to blockage, prior models for cellular networks operated in the ultra high frequency (UHF) band do not apply to ...
T. Bai, R. Heath
semanticscholar   +1 more source

Active odd-mode-metachannel for single-conductor systems

open access: yesOpto-Electronic Advances, 2022
Although tremendous efforts have been devoted to investigating planar single-conductor circuits, it remains challenging to provide tight confinement of electromagnetic field and compatibility with active semi-conductor components such as amplifier ...
Pei Hang He   +7 more
doaj   +1 more source

Millimeter Observations of GRB 030329: Continued Evidence for a Two-Component Jet [PDF]

open access: yes, 2003
We present the results of a dedicated campaign on the afterglow of GRB 030329 with the millimeter interferometers of the Owens Valley Radio Observatory (OVRO), the Berkeley-Illinois-Maryland Association (BIMA), and with the MAMBO-2 bolometer array on the
Bremer M.   +10 more
core   +3 more sources

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