Results 41 to 50 of about 2,779,889 (365)

Dual-band beam steering THz antenna using active frequency selective surface based on graphene

open access: yesEPJ Applied Metamaterials, 2021
A dual-band independently beam steering THz antenna is presented, which is composed of a broadband omnidirectional monopole source antenna surrounded by six hexagonal active frequency selective surface (AFSS) screens with switchable filtering response in
Yang Yao-Jia   +3 more
doaj   +1 more source

Millimeter Wave Substrate Integrated Waveguide Antennas: Design and Fabrication Analysis [PDF]

open access: yes, 2009
The paper presents a new concept in antenna design, whereby a photo-imageable thick-film process is used to integrate a waveguide antenna within a multilayer structure. This has yielded a very compact, high performance antenna working at high millimeter-
Izqueirdo, B   +9 more
core   +1 more source

A High-Precision Hybrid Analog and Digital Beamforming Transceiver System for 5G Millimeter-Wave Communication

open access: yesIEEE Access, 2019
In this paper, the development of a millimeter-wave hybrid beamforming (HBF) transceiver system for 5G millimeter-wave multiple-input-multiple-output (MIMO) communication is presented.
Ruoqiao Zhang   +4 more
doaj   +1 more source

Combined Single-Layer K-Band Transmitarray and Beamforming S-Band Antenna Array for Satcom

open access: yesIEEE Open Journal of Antennas and Propagation, 2022
In this paper, a dual-band antenna at 4.5 GHz and 25 GHz is presented. The antenna is a low-frequency phased patch antenna array combined with a high-frequency transmitarray with a fixed beam.
Daniel Edelgaard Serup   +2 more
doaj   +1 more source

Overview of Millimeter Wave Communications for Fifth-Generation (5G) Wireless Networks—With a Focus on Propagation Models [PDF]

open access: yesIEEE Transactions on Antennas and Propagation, 2017
This paper provides an overview of the features of fifth generation (5G) wireless communication systems now being developed for use in the millimeter wave (mmWave) frequency bands.
T. Rappaport   +5 more
semanticscholar   +1 more source

High-Isolation MIMO Antenna for 5G Millimeter-Wave Communication Systems

open access: yesElectronics, 2022
The work in this article presents the design and realization of a low-profile, four-port MIMO antenna supporting fifth-generation (5G) wireless applications operating at a millimeter-Wave (mm-Wave) band.
M. Bilal   +4 more
semanticscholar   +1 more source

Indoor Pico-Cellular Network Operation based on a Simple Optical Millimetre-Wave Generation Scheme [PDF]

open access: yes, 2010
Experimental demonstrations of modulated signal transmission and pico-cellular network operation at millimeter-wave frequencies, which are based on a simple technique for millimeter-wave generation using an optical phase modulator and optical filtering ...
Jeanne James   +14 more
core   +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

Signal Processing for TDM MIMO FMCW Millimeter-Wave Radar Sensors

open access: yesIEEE Access, 2021
In this tutorial paper, we systematically present the fundamental operating principles and analytical details of the discrete Fourier transform based signal processing techniques for the TDM MIMO FMCW millimeter-wave (mmWave) automotive radars.
Xinrong Li   +3 more
semanticscholar   +1 more source

Millimeter-wave compressive holography [PDF]

open access: yesApplied Optics, 2010
We describe an active millimeter-wave holographic imaging system that uses compressive measurements for three-dimensional (3D) tomographic object estimation. Our system records a two-dimensional (2D) digitized Gabor hologram by translating a single pixel incoherent receiver. Two approaches for compressive measurement are undertaken: nonlinear inversion
Cull, Christy Fernandez   +4 more
openaire   +2 more sources

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