Results 21 to 30 of about 639,513 (288)

Radiation characteristics of corner reflector antennas. [PDF]

open access: yes, 1998
PhDThis thesis presents a study of the radiation characteristics of corner reflector antennas. The influence of the design parameters on the radiation characteristics are assessed using an analytical method and the Finite Difference Time Domain (FDTD)
Sterr, U.
core   +4 more sources

CP metasurfaced antennas excited by LP sources [PDF]

open access: yes, 2012
A metasurface which is considered as a polarizer for microwave antennas is proposed in this paper. Preliminary results have shown that circularly polarized (CP) radiation can be obtained from linearly polarized (LP) source antennas with the use of ...
T. I. Yuk   +14 more
core   +1 more source

Radiation Pattern Synthesis of Folded Geodesic Lens Antennas [PDF]

open access: yes, 2023
European Conference on Antennas and Propagation (17th. 2023. Florence, Italy)The fifth and sixth generation of mobile communication systems will allow the development of several new services.
Loredo Rodríguez, Susana   +3 more
core   +1 more source

Ray-Tracing Model For Elliptical Half-Geodesic Lens Antennas

open access: yes, 2022
This paper presents a ray-tracing based approach to determine the radiation pattern of geodesic lens antennas with a central mirror plane. The addition of the mirror plane effectively reduces the xy-plane of the lens by 50% from the original rotationally
Clendinning, Sarah,   +2 more
core   +1 more source

Radio Source Localization in Multipath Channels Using EM Lens Assisted Massive Antennas Arrays

open access: yesIEEE Access, 2019
The focusing ability of the lens antennas can significantly contribute to perform precise radio localization with low complexity in a massive antennas array (MAA) system.
Sarmad A. Shaikh, Andrea M. Tonello
doaj   +1 more source

A novel technique and soldering method to improve performance of transparent polymer antennas [PDF]

open access: yes, 2010
This article is archived here with permission from IEEE - Copyright @ 2010 IEEEA novel technique and a non-thermal soldering method to improve the performance of AgHT-8 transparent polymer antennas are proposed in this paper.
AbuTarboush, HF   +7 more
core   +1 more source

Rectangular metamaterial Luneburg lens for dual polarized multi-beam radiation based on transformation optics [PDF]

open access: yesAIP Advances
This paper proposes a rectangular metamaterial Luneburg lens antenna with dual polarized multi-beam radiation. Using the transformation optics (TO) principle, the propagation of the electromagnetic wave can be arbitrarily manipulated; therefore, a ...
Bingyue Qu
doaj   +1 more source

Review of Luneburg Lens Antenna Designs Manufactured Using 3D Printing

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника
Introduction. The interest in multibeam dielectric lens antenna arrays has been growing in recent years due to the development of millimeter-wave telecommunication and radar systems.
D. V. Kusaykin   +3 more
doaj   +1 more source

Metamaterial Lenses and Their Applications at Microwave Frequencies

open access: yesAdvanced Photonics Research, 2021
Metamaterials (MTMs) are artificial structures characterized by flexible and designable electromagnetic (EM) properties, including permittivity, permeability, and refractive index.
Wenxuan Tang, Jia Chen, Tie Jun Cui
doaj   +1 more source

Deep Learning-Based Channel Estimation for mmWave Massive MIMO Systems in Mixed-ADC Architecture

open access: yesSensors, 2022
Millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) systems can significantly reduce the number of radio frequency (RF) chains by using lens antenna arrays, because it is usually the case that the number of RF chains is often much ...
Rui Zhang   +4 more
doaj   +1 more source

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