Results 11 to 20 of about 157,712 (295)

A reconfigurable wideband and multiband antenna using dual-patch elements for compact wireless devices [PDF]

open access: yes, 2011
This is the post-print version of the Article. The official published version can be accessed from the link below - Copyright @ 2012 IEEEA reconfigurable wideband and multiband C-Slot patch antenna with dual-patch elements is proposed and studied.
AbuTarboush, H.F.   +13 more
core   +2 more sources

An Efficient Solution to the Perspective-n-Point Problem for Camera With Unknown Focal Length

open access: yesIEEE Access, 2020
To achieve lower time consumption in pose estimation of an uncalibrated camera, a novel and efficient method to the Perspective-n-Point problem (PnP) is proposed in this article.
Bingyi Zhou, Ziqiang Chen, Qinghua Liu
doaj   +1 more source

On the Non-Coherent Wideband Multipath Fading Relay Channel [PDF]

open access: yes, 2010
We investigate the multipath fading relay channel in the limit of a large bandwidth, and in the non-coherent setting, where the channel state is unknown to all terminals, including the relay and the destination.
Fawaz, Nadia, Medard, Muriel
core   +1 more source

CPW Fed UWB Antenna by EBGs With Wide Rectangular Notched-Band

open access: yesIEEE Access, 2016
Ultra-wideband (UWB) antennas with wide rectangular notched-band are proposed in this paper. The rectangular notched-band design is realized by placing dual mushroom-type electromagnetic-bandgap (EBG) structures on the CPW feeding line.
Lin Peng   +4 more
doaj   +1 more source

Tunable Triple-Band Terahertz Absorber Based on Bulk-Dirac-Semimetal Metasurface

open access: yesIEEE Photonics Journal, 2021
A tunable triple-band absorber based on bulk-Dirac-semimetal (BDS) metasurface is proposed in the terahertz (THz) range. The design is comprised of a BDS film with a pattern of dual ring slots and a dielectric layer stacked on a fully reflective gold ...
Jiao Wang, Xinguo Wan, Yannan Jiang
doaj   +1 more source

Front to Back Ratio Bandwidth Enhancement of Resonance Based Reflector Antenna by Using a Ring-Shape Director and Its Time-Domain Analysis

open access: yesIEEE Access, 2017
An uni-directional antenna designed by resonance-based reflector has the merits of compact size, low-profile, and ultra-wide impedance bandwidth. However, its front to back ratio (FBR) bandwidth is narrow owing to the small reflection coefficient values ...
Lin Peng   +3 more
doaj   +1 more source

An Electrically Tunable Terahertz Filter Based on Liquid-Crystal-Filled Slits with Wall Corrugations

open access: yesPhotonics, 2022
We propose a type of hollow planar waveguide with corrugated walls, which can realize electrically tunable terahertz (THz) filtering by filling the slit with liquid crystals. When the THz signals propagate in a planar waveguide with periodic corrugations,
Shi-Yang Zhang   +6 more
doaj   +1 more source

On Non-coherent MIMO Channels in the Wideband Regime: Capacity and Reliability [PDF]

open access: yes, 2006
We consider a multiple-input, multiple-output (MIMO) wideband Rayleigh block fading channel where the channel state is unknown to both the transmitter and the receiver and there is only an average power constraint on the input.
Medard, Muriel   +2 more
core   +2 more sources

Multi-functional Device with Switchable Functions of Absorption and Polarization Conversion at Terahertz Range

open access: yesNanoscale Research Letters, 2018
Terahertz electromagnetic (EM) wave components usually have a single function, such as they can only convert the polarization state of an incident wave or absorb the incident energy, which would be a limitation for their applications.
Lin Peng, Xing Jiang, Si-min Li
doaj   +1 more source

A ray tracing algorithm for microcellular wideband propagation modelling [PDF]

open access: yes, 1995
In this paper a 3-D `image-based' ray tracing algorithm for microcellular environments is presented. The model is capable of predicting wideband as well as narrowband propagation information. To demonstrate the viability of this approach, predictions are
Athanasiadou, GE, McGeehan, JP, Nix, AR
core   +2 more sources

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