Results 31 to 40 of about 611,978 (349)

Wideband circularly polarised antenna array with isoflux pattern

IET Microwaves, Antennas & Propagation, 2021
The authors present a wideband circularly polarised antenna array consisting of a 10‐element ellipse dipole antenna and a feed network. A metal pillar is vertically loaded at the end of each ellipse dipole arm to extend the current path, thereby reducing
Fanchao Zeng, Zhi‐Ya Zhang, Yang Feng, Shaoli Zuo, Chengbin Zhang, Li Wang   +5 more
doaj   +1 more source

Sector Unit-Cell Methodology for the Design of Sub-6 GHz 5G MIMO Antennas

IEEE Access, 2022
A novel methodology based on the sectorization of multiple-port cavities with azimuthal symmetry into sector unit cells is presented to design 5G multiple-input multiple-output (MIMO) sub-6 GHz antennas.
Jaime Molins-Benlliure, Marta Cabedo-Fabres, Eva Antonino-Daviu, Miguel Ferrando-Bataller   +3 more
doaj   +1 more source

WLAN/WDS performance using directive antennas in highly mobile scenarios: experimental results [PDF]

, 2008
This paper presents experimental results from a series of IEEE 802.11g studies to investigate the performance of vehicular to roadside wireless communications. In particular, two high-gain omni-directional antennas were used at the roadside access point,
Nix, AR, Zaggoulos, G
core   +2 more sources

Design and Analysis of Dual-Polarized Frequency-Selective Metasurface for X-Band Notch Applications

Sensors
This paper presents a miniaturized, polarization-insensitive frequency-selective metasurface (FSMS) with stopband behavior for RF shielding applications. The FSMS is designed to suppress communication at 10 GHz frequency in the X-band.
Muhammad Idrees, Sai-Wai Wong, Yejun He
doaj   +1 more source

Optically Transparent Single-Layer Dual-Frequency Dual-Polarization Metasurface Applied in Close Proximity to Smartphone Millimeter-Wave Phased Array Antenna Systems

IEEE Open Journal of Antennas and Propagation
An optically transparent single-layer dual-frequency dual-polarization metasurface operating at 28 GHz and 38 GHz is proposed to enhance millimeter-wave transmission through glass.
Wen Fu, Igor Syrytsin, Rocio Rodriguez Cano, Peiye Liu, Andrey Kobyakov, Gert Fround Pedersen, Shuai Zhang   +6 more
doaj   +1 more source

Efficient RCS Computation Over a Broad Frequency Band Using Subdomain MoM and Chebyshev Approximation Technique

IEEE Access, 2020
The analysis of the target's broadband electromagnetic scattering characteristics plays an important role in radar stealth and recognition areas. The traditional method of moments (MoM) needs to calculate the currents at each frequency point when ...
Xing Wang, Haoxuan Gong, Shuai Zhang, Ying Liu, Ruipeng Yang, Chunheng Liu   +5 more
doaj   +1 more source

Selective Laser Sintering Manufacturing as a Low Cost Alternative for Flat-Panel Antennas in Millimeter-Wave Bands

IEEE Access, 2021
In this paper, the capabilities of Selective Laser Sintering metal 3D-Printing technology to achieve a lightweight and cost-effective flat panel antenna in the millimeter wave band are studied.
Miguel Ferrando-Rocher, Jose Ignacio Herranz-Herruzo, Alejandro Valero-Nogueira, Bernardo Bernardo-Clemente   +3 more
doaj   +1 more source

Scalable and Energy-Efficient Millimeter Massive MIMO Architectures: Reflect-Array and Transmit-Array Antennas

, 2018
Hybrid analog-digital architectures are considered as promising candidates for implementing millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) systems since they enable a considerable reduction of the required number of costly radio ...
Fischer, Georg, Jamali, Vahid, Müller, Ralf, Schober, Robert, Tulino, Antonia M.   +4 more
core   +1 more source

Dual-Band Frequency Selective Surface With Compact Dimension and Low Frequency Ratio

IEEE Access, 2020
In this paper, frequency selective surface (FSS) with low profile, miniaturized structure and closely located dual-band is proposed based on the fractal technology. The FSS is designed by etching the conductive pattern on a single layer substrate.
Tong Cheng, Zhili Jia, Tao Hong, Wen Jiang, Shuxi Gong   +4 more
doaj   +1 more source

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

, 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, Ray, Siddharth, Zheng, Lizhong   +2 more
core   +2 more sources