Results 41 to 50 of about 325,108 (297)

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

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

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

Massive MIMO for Wireless Sensing with a Coherent Multiple Access Channel [PDF]

, 2015
We consider the detection and estimation of a zero-mean Gaussian signal in a wireless sensor network with a coherent multiple access channel, when the fusion center (FC) is configured with a large number of antennas and the wireless channels between the ...
Chen, Jie, Jiang, Feng, Lopez-Salcedo, Jose A., Swindlehurst, A. Lee   +3 more
core   +2 more sources

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

Optimal Number of Transmit Antennas for Secrecy Enhancement in Massive MIMOME Channels

, 2017
This paper studies the impact of transmit antenna selection on the secrecy performance of massive MIMO wiretap channels. We consider a scenario in which a multi-antenna transmitter selects a subset of transmit antennas with the strongest channel gains ...
Asaad, Saba, Bereyhi, Ali, Müller, Ralf R., Rabiei, Amir M., Schaefer, Rafael F.   +4 more
core   +1 more source

A Single-Layer Wideband Differential-Fed Microstrip Patch Antenna With Complementary Split-Ring Resonators Loaded

IEEE Access, 2019
In this paper, a single-layer wideband differential-fed microstrip patch antenna (DMPA) with complementary split-ring resonators (CSRRs) loaded is proposed.
Shu Feng, Li Zhang, Hong-Wei Yu, Yi-Xuan Zhang, Yong-Chang Jiao   +4 more
doaj   +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

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

Utility of Computed Tomography Surveillance of Asymptomatic Infection in Children and Young Adults Before Allogeneic Hematopoietic Stem Cell Transplant

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Asymptomatic infection poses a significant risk for children undergoing hematopoietic stem cell transplantation (HSCT). Pre‐transplant surveillance computed tomography (CT) is commonly used to identify occult infection, though its diagnostic yield remains uncertain.
Tyler Obermark, Pradipta Debnath, Rama S. Ayyala, Lara A. Danziger‐Isakov, Jane Koo, Kasiani C. Myers, William R. Otto, Aki Tanimoto, Andrew T. Trout, Cara E. Morin   +9 more
wiley   +1 more source