Results 21 to 30 of about 7,981,538 (380)

New approach to far field analysis for radiation pattern estimation using FDTD method [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2014
In this paper an approach to efficient computation of radiation pattern in FDTD simulation environment is presented. A necessary large distance from the radiating object is achieved by multigrid space discretization with unilaterally connected ...
Nikolić Bojana   +4 more
doaj   +1 more source

Enhancing the Radiation Pattern of Circularly Polarized Dielectric Rod Antenna Using Planar Excitation Method

open access: yesIEEE Access, 2023
In this article, by placing a teflon tube around a circularly polarized dielectric resonator antenna, a dielectric rod antenna with a directive radiation pattern is obtained.
Saeed Fakhte, Ladislau Matekovits
doaj   +1 more source

Radiation-Pattern Reconfigurable Phased Array With p-i-n Diodes Controlled for 5G Mobile Terminals

open access: yesIEEE transactions on microwave theory and techniques, 2020
A p-i-n diodes-controlled radiation-pattern reconfigurable phased array for fifth-generation (5G) handsets is proposed in this article. The proposed beam scanning and switching hybrid system can significantly reduce the number of arrays and transmit ...
Jin Zhang   +4 more
semanticscholar   +1 more source

Small Size Wideband Monopole Antenna with Five Notch Bands for Different Wireless Applications [PDF]

open access: yesRadioengineering, 2022
A broadband planar monopole antenna with five notch bands is proposed here. The antenna provides broadband from 1.94 GHz to 15.4 GHz with five notch bands covering 3.1-4.1 GHz, 6-6.4 GHz, 8.2-9.2 GHz, 10-11.6 GHz, and 12.38-12.89 GHz.
S. Bala   +3 more
doaj  

3-D Trajectory Optimization in UAV-Assisted Cellular Networks Considering Antenna Radiation Pattern and Backhaul Constraint [PDF]

open access: yesIEEE Transactions on Aerospace and Electronic Systems, 2019
This article explores the effects of 3-D antenna radiation pattern and backhaul constraint on optimal 3-D path planning problem of an unmanned aerial vehicle (UAV), in interference prevalent downlink cellular networks.
Md Moin Uddin Chowdhury   +3 more
semanticscholar   +1 more source

A Novel Wideband Magneto-Electric Dipole Antenna with Improved Feeding Structure

open access: yesAdvanced Electromagnetics, 2016
A novel feeding structure in magneto-electric dipole antenna is proposed and analyzed, which is simpler and better in performance than previous designs, involving differential feeding.
N. Marwah   +3 more
doaj   +1 more source

Plant Foliar Geometry as a Biomimetic Template for Antenna Design

open access: yesBiomimetics, 2023
Plant diversity includes over 300,000 species, and leaf structure is one of the main targets of selection, being highly variable in shape and size. On the other hand, the optimization of antenna design has no unique solution to satisfy the current range ...
Jose Ignacio Lozano   +5 more
doaj   +1 more source

Double-heterostructure cavities: from theory to design [PDF]

open access: yes, 2012
We derive a frequency-domain-based approach for radiation (FAR) from double-heterostructure cavity (DHC) modes. We use this to compute the quality factors and radiation patterns of DHC modes. The semi-analytic nature of our method enables us to provide a
C. Martijn de Sterke   +9 more
core   +1 more source

A Frequency and Radiation Pattern Combo-Reconfigurable Novel Antenna for 5G Applications and Beyond

open access: yesElectronics, 2020
This paper presents a novel combo-reconfigurable architecture for the frequency and radiation patterning of a novel antenna system for future fifth-generation (5G) millimeter-wave mobile communication.
M. Shereen   +2 more
semanticscholar   +1 more source

Three-dimensional double helical DNA structure directly revealed from its X-ray fiber diffraction pattern by iterative phase retrieval [PDF]

open access: yes, 2018
Coherent diffraction imaging (CDI) allows the retrieval of the structure of an isolated object, such as a macromolecule, from its diffraction pattern. CDI requires the fulfilment of two conditions: the imaging radiation must be coherent and the object ...
Fink, Hans-Werner   +1 more
core   +1 more source

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