Results 1 to 10 of about 22,325 (306)

A Triangular Prism Spatial Interpolation Method for Mapping Geological Property Fields

open access: yesISPRS International Journal of Geo-Information, 2017
: The spatial interpolation of property fields in 3D, such as the temperature, salinity, and organic content of ocean water, is an active area of research in the applied geosciences.
Yang Cui   +7 more
doaj   +1 more source

Adaptive Polarization Diversity and Directivity Mode Selection in RIS-Aided Systems

open access: yesIEEE Access
This paper proposes an adaptive architecture for Reconfigurable Intelligent Surface (RIS)-assisted wireless communication, enhancing system performance by dynamically switching between polarization diversity and directivity modes. The RIS is divided into
Hamidreza Khaleghi, Thierry Lucidarme
doaj   +1 more source

Proving the Feasibility of D-Band Single SiGe MMIC Vector Network Analyzer Extension Modules With Large System Dynamic Range

open access: yesIEEE Journal of Microwaves
The need for size and cost-efficient vector network analyzer (VNA) frequency extension modules (VNAX module) is driven by new applications in research and industry.
Justin Romstadt   +10 more
doaj   +1 more source

DIPOLE ANTENNAS WITH A SECTOR-SHAPED RADIATION PATTERN [PDF]

open access: yesRadio Physics and Radio Astronomy
Subject and Purpose. The directivity characteristics of a dipole antenna when it is placed above and parallel to a perfectly conducting screen of rectangular shape are considered, aiming to theoretically study dipole antennas with sector-shaped radiation
M. M. Gorobets   +3 more
doaj   +1 more source

An efficient compact blazed grating antenna for optical phased arrays

open access: yesJPhys Photonics
Phased arrays are vital in communication systems and have received significant interest in the field of optoelectronics and photonics, enabling a wide range of applications such as LiDAR, holography, and wireless communication. In this work, we present a
Henna Farheen   +4 more
doaj   +1 more source

Analysis and design of L-strip proximity coupled circular microstrip antenna

open access: yesJournal of Microwaves, Optoelectronics and Electromagnetic Applications
An L-strip proximity coupled circular microstrip antenna is proposed. The structure is investigated using circuit theoretic approach and simulated using IE3D simulation software.
Ganga Prasad Pandey   +3 more
doaj   +1 more source

Coupled line directional couplers with controlling type of directivity

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2015
The original design approach for 0-dB directional coupler with forward and backward coupling in two different frequency bands is proposed. The device is realized by loading the coupled line based directional coupler by split ring and mushroom resonators.
I. V. Munina
doaj  

Orbital Angular Momentum for Wireless Communications: Key Performance Indicators and Performance Comparison

open access: yesIEEE Access
Orbital angular momentum (OAM) is an intrinsic property of electromagnetic (EM) waves that has opened new possibilities for enhancing the capacity of wireless communications. Consequently, it has garnered significant attention in recent years.
Zihao Wang   +2 more
doaj   +1 more source

Experimental reserch of TEM-horn antenna with inhomogeneous dielectric

open access: yesФизика волновых процессов и радиотехнические системы, 2016
There proposed a technique for improving linear TEM-horn antenna directivity and matching by filling its inner space with inhomogeneous dielectric medium.
A.M. Bobreshov   +3 more
doaj  

COMPARATIVE ANALYSIS OF RANDOM SCANNING ANTENNA ARRAYS WITH DIFFERENT FORMS OF APERTURE

open access: yesДоклады Белорусского государственного университета информатики и радиоэлектроники, 2019
The results of numerical simulation of antenna array with rectangular, elliptical and octagonal aperture and uniform distribution of radiators are presented.
I. F. Shalyapin   +2 more
doaj  

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