Results 11 to 20 of about 5,646 (202)

Analysis and Elimination of Unwanted Resonances for Wideband Reflectarray Antenna Design at Sub-Millimeter Waves

open access: yesIEEE Access, 2020
In this study, unwanted additional resonances are analyzed and a method is developed to eliminate them for wideband offset dual reflectarray antenna at sub-millimeter waves.
Eun-Cheol Choi, Sangwook Nam
doaj   +1 more source

Proof-of-Concept on Misalignment Compensation for 5.8-GHz-Band Reflectarray Antennas by Varactor Diodes

open access: yesIEEE Access, 2021
Membrane reflectarray antennas with flexible support structures realize low weight and low stowage volume. However, deformation of the reflectarray membrane generally degrades antenna gain. We propose electrical misalignment compensation for 5.8-GHz-band
Keisuke Omoto   +2 more
doaj   +1 more source

An Efficiency-Improved Tightly Coupled Dipole Reflectarray Antenna Using Variant-Coupling-Capacitance Method

open access: yesIEEE Access, 2020
In this paper, a tightly coupled dipole reflectarray antenna as well as a variant-coupling-capacitance method to improve the antenna aperture efficiency is presented.
Jiayou Wang   +3 more
doaj   +1 more source

Efficient Spectral Domain MoM for the Design of Circularly Polarized Reflectarray Antennas Made of Split Rings [PDF]

open access: yes, 2019
The method of moments (MoM) in the spectral domain is used for the analysis of the scattering of a plane wave by a multilayered periodic structure containing conducting concentric split rings in the unit cell.
Encinar, José A.   +2 more
core   +1 more source

Radiation Analysis and Characteristics of Conformal Reflectarray Antennas

open access: yesInternational Journal of Antennas and Propagation, 2012
This paper investigates the feasibility of designing reflectarray antennas on conformal surfaces. A generalized analysis approach is presented that can be applied to compute the radiation performance of conformal reflectarray antennas.
Payam Nayeri   +2 more
doaj   +1 more source

A Reflectarray Antenna Using Hexagonal Lattice With Enhanced Beam Steering Capability

open access: yesIEEE Access, 2019
This paper presents a novel reflectarray antenna with enhanced beam steering capability. The reflectarray antenna is based on the hexagonal distribution of the unit cells on the antenna surface.
Orcun Kiris, Kagan Topalli, Mehmet Unlu
doaj   +1 more source

Enhanced Efficiency and Reduced Side Lobe Level Convex Conformal Reflectarray

open access: yesApplied Sciences, 2021
In this work, the design of a convex conformal reflectarray (CRA), suitable to be used for high gain on board antenna in mobile communication systems, is presented.
Michele Beccaria   +7 more
doaj   +1 more source

Real-time power system dynamic security assessment based on advanced feature selection for decision tree classifiers [PDF]

open access: yes, 2017
This paper proposed a novel algorithm based on advanced feature selection technique for decision tree (DT) classifier to assess the dynamic security in power system.
Al-Gubri, Qusay, Mohd Ariff, Mohd Aifaa
core   +1 more source

New Phase Realization Approach for Implementation of Braodband Reflectarrays

open access: yesInternational Journal of Information and Communication Technology Research, 2021
We present a new phase realization approach applied to design the broadband single-layer reflectarray antennas. Such an optimization technique minimizes the adverse effects of frequency dispersion which limit the bandwidth of reflectarray antenna ...
Mahmood Rafaei-Booket   +1 more
doaj  

A Review of Wideband Reflectarray Antennas for 5G Communication Systems

open access: yesIEEE Access, 2017
The advancement in the current communication technology makes it incumbent to analyze the conventional features of reflectarray antenna for future adaptability.
Muhammad Hashim Dahri   +3 more
doaj   +1 more source

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