Results 31 to 40 of about 325,108 (297)

Understanding Link Dynamics in Wireless Sensor Networks with Dynamically Steerable Directional Antennas [PDF]

, 2013
. By radiating the power in the direction of choice, electronicallyswitched directional (ESD) antennas can reduce network contention and avoid packet loss.
C. Noda, D.V. Thiel, E. Felemban, E. Öström, F. Viani, J. Borms, M. Ceriotti, P. Pettinato, R. Ramanathan, Y. Zhang   +9 more
core   +2 more sources

Parametric Analysis and Bandwidth Optimisation of Hybrid Linear-exponential Tapered Slot Vivaldi Antennas [PDF]

, 2018
This work presents an analysis of the effects of a hybrid linear-exponential tapered slot on the key properties of both the antipodal and co-planar Vivaldi antennas at low frequencies using parametric analysis and Nonlinear Sequential Programming ...
Gamage, Kelum A.A., Ukaegbu, Ikechukwu K.   +1 more
core   +1 more source

A Dual-Band MIMO Antenna With Enhanced Isolation for 5G Smartphone Applications

IEEE Access, 2019
In this paper, a compact dual-band MIMO antenna array for 5G smartphone applications is proposed. The MIMO antenna consists of eight folded monopole antennas operating at 3.45-GHz band (3300~3600MHz).
Wen Jiang, Yangqiang Cui, Bo Liu, Wei Hu, Yan Xi   +4 more
doaj   +1 more source

Nanorod optical antennas for dipolar transitions [PDF]

, 2009
Optical antennas link objects to light. Here, we analyze metal nanorod antennas as cavities with variable reflection coefficients to derive the interaction of dipolar transitions with radiation through the antenna modes.
Stefani, Fernando D., Taminiau, Tim H., van Hulst, Niek F.   +2 more
core   +2 more sources

A Miniaturized Dual-Band Frequency Selective Surface with Enhanced Capacitance Loading for WLAN Applications

Sensors
This article presents a miniaturized dual-band frequency selective surface (FSS) based on capacitance-enhancing technique for RF shielding applications. The FSS incorporates two independent corner-modified square loop (CMSL) elements realized on a lossy ...
Muhammad Idrees, Sai-Wai Wong, Abdul Majeed, Shu-Qing Zhang, Yejun He   +4 more
doaj   +1 more source

A Meta-Surface Decoupling Method for Two Linear Polarized Antenna Array in Sub-6 GHz Base Station Applications

IEEE Access, 2019
In this paper, an extremely compact two-element linear polarized multiple-input-multiple-output (MIMO) antenna array with a metasurface superstrate is proposed.
Feng Liu, Jiayin Guo, Luyu Zhao, Xiumei Shen, Yingzeng Yin   +4 more
doaj   +1 more source

Design of a Miniaturized and Polarization-Independent Frequency-Selective Surface for Targeted EMI Shielding

Applied Sciences
In this article, a miniaturized frequency-selective surface (FSS)-based electromagnetic shield is investigated for EMI mitigation in the X-band. The FSS comprises a convoluted conducting loop designed over an FR-4 substrate.
Muhammad Idrees, Yejun He, Youquan Wen, Abdul Majeed   +3 more
doaj   +1 more source

Design of Wideband Circularly Polarized Crossed-Dipole Antenna Using Parasitic Modified Patches

IEEE Access, 2019
In this paper, a wideband circularly polarized (CP) crossed-dipole antenna is presented by using parasitic modified patches. Four polygonal metal patches are sequentially rotated around the crossed dipoles.
Zhipeng Zhao, Yapeng Li, Meng Xue, Le Wang, Zhaoyang Tang, Yingzeng Yin   +5 more
doaj   +1 more source

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

Location Spoofing Detection for VANETs by a Single Base Station in Rician Fading Channels [PDF]

, 2014
In this work we examine the performance of a Location Spoofing Detection System (LSDS) for vehicular networks in the realistic setting of Rician fading channels.
Malaney, Robert, Nevat, Ido, Peters, Gareth W., Yan, Shihao   +3 more
core   +1 more source