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30 resultados encontrados.

Tipos de recurso: Libro electrónico Artículo Revista Tesis Capítulo
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Radio-Wave Propagation Model for UHF Band in Different Climatic Conditions with Dyadic Green’s Function
Artículo
Acceso abierto Artículo DOAJ
Cristiane R. Gomes Jr et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · ISSN 2179-1074
AbstractThis article proposes a deterministic radio propagation model using dyadic Green's function to predict the value of the electric field. Dyadic is offered as an efficient mathematical tool which has symbolic simpl...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
Demonstration of 256 QAM 10 Gbps Signal Transmission over 570 km Fiber-based NG Radio over Fiber System
Artículo
Acceso abierto Artículo DOAJ
Hasan k. Al Deen et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · 2024 · ISSN 2179-1074
Abstract The rapid development of the Fifth Generation (5G) networks encourages researchers to improve the Radio over Fiber (RoF) technique to achieve data rates of 10 Gbps and beyond. That led to a significant increase ...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
Estimating the location of maximum exposure to electromagnetic fields associated with a radiocommunication station
Artículo
Acceso abierto Artículo DOAJ
Agostinho Linhares et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · ISSN 2179-1074
This paper proposes an approach to estimate the probable location of maximum exposure to electromagnetic fields associated with a radiocommunication station, based only on information of antenna's height, half-power angl...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
Geometry optimization for application of radio frequency signals on diamond samples
Artículo
Acceso abierto Artículo DOAJ
Ricardo R. Wolf Cruz et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · ISSN 2179-1074
This work describes the design and optimization of a printed circuit board containing a rectangular half-loop coil designed to apply radio frequency signals on micrometric diamond crystals. The structure was optimized to...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
Implementation of a Spectrum Analyzer Using the Software-Defined Radio Concept
Artículo
Acceso abierto Artículo DOAJ
Paulo V. A. Freitas et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · 2021 · ISSN 2179-1074
Abstract The software-defined radio has been allowing engineers the possibility of implementing operations on software that were previously only possible to be performed through hardware. With the continuous increase in ...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
Software-Defined Radio Applied to a Shielding Effectiveness Measurement
Artículo
Acceso abierto Artículo DOAJ
Marcelo B. Perotoni et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · 2023 · ISSN 2179-1074
Abstract This article describes the use of a low-cost softwaredefined radio applied to an Electromagnetic Compatibility (EMC) test. The proposed system is indicated for cases when an autonomous instrument is better suite...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
Application of the Finite-Difference Frequency-Domain (FDFD) method on radiowave propagation in urban environments
Artículo
Acceso abierto Artículo DOAJ
Cláudio Garcia Batista et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · ISSN 2179-1074
Abstract In this work a Finite-Difference Frequency-Domain (FDFD) propagation method for complex urban environments is proposed. The formulation starts from the discretization of the Helmholtz equation for the magnetic f...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
A Modified Radiopropagation Multipath Model for Constant Refractivity Gradient Profiles
Artículo
Acceso abierto Artículo DOAJ
D. Parada et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · 2023 · ISSN 2179-1074
Abstract This paper presents a radiopropagation algorithm based on a Ray Tracing (RT) technique that combines a modified multipath model for constant refractivity gradient profiles and the Uniform Theory of Diffraction (...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
Design of a novel dual: band planar inverted F - antenna for mobile radio applications
Artículo
Acceso abierto Artículo DOAJ
N. Chattoraj et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · 2014 · ISSN 2179-1074
The design of a novel compact dual band PIFA (Planar Inverted F-Antenna) as an embedded antenna is reported in this paper for mobile radio applications. The new shorted planar antenna is realized using copper sheet of th...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
Effect of Weather Condition on QoCS Beam of Downlink Microwave Radio Signals for High-Definition Digital Terrestrial Link over Abuja, Nigeria
Artículo
Acceso abierto Artículo DOAJ
Joseph S. Ojo et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · 2025 · ISSN 2179-1074
Abstract High-Definition Digital Terrestrial Television (HDDTT) replaces analogue, requiring further research on propagation links due to atmospheric variables potentially disrupting signals during uplink and downlink re...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
3PS-RAN: A Real-Time Framework for Securing the O-RAN RACH Against DDoS Attacks Toward NextG
Artículo
Material complementario disponible Artículo DOAJ
Nurullah Aksu et al · IEEE · 2026 · ISSN 2169-3536
Even with the introduction of additional security features, the progression toward 6G and Open Radio Access Network (O-RAN) architectures expands security risks, increasing both the scale and complexity of mobile network...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
Material complementario disponibleEl enlace apunta a material asociado, anexos, tablas, datos o página complementaria. No se marca como libro/texto completo.
Material complementario
A Runtime Safety Copilot for AI-Native O-RAN: Predictive Verification and Fail-Safe Enforcement in Near-RT RIC Control Loops
Artículo
Material complementario disponible Artículo DOAJ
Md Asef Jawad et al · IEEE · 2026 · ISSN 2169-3536
Sixth-generation (6G) mobile networks are expected to be AI-native by design, with intelligence embedded directly into the Radio Access Network (RAN) control loop through architectures such as O-RAN, near-real-time RAN I...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Choosing Clutter Heights in ITU-R P.1812 Recommendation for LoRaWAN Link Budget
Artículo
Acceso abierto Artículo DOAJ
Bryan da S. Duarte et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · 2025 · ISSN 2179-1074
Abstract The Internet of Things (IoT) encompasses a diverse array of solutions with applications ranging from smart cities to environmental monitoring and industrial processes. In this context, communication techniques t...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
Optimum Positioning of Base Station for Cellular Service Devices Using Discrete Knowledge Model
Artículo
Acceso abierto Artículo DOAJ
Cristiane R. Gomes et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · 2020 · ISSN 2179-1074
Abstract A good wireless network design depends on technical and financial viability and a number of other criteria that must be met. Following the emergence of new technologies and services, such as 5G transmission and ...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
Evaluation of OFDM Channel Sounding Techniques with Three Modulation Sequences
Artículo
Acceso abierto Artículo DOAJ
Marcelo Molina Silva et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · 2019 · ISSN 2179-1074
Abstract This paper presents an evaluation of multicarrier channel sounding techniques using different random and pseudo-random sequences to modulate the OFDM sounding signal. The Random (Rand), Pseudo-Noise (PN) and Zad...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
Implementation of a Multi-Gbit/s and GFDM-based Optical-Wireless 5G Network
Artículo
Acceso abierto Artículo DOAJ
R. M. Borges et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · ISSN 2179-1074
Abstract We report the implementation of an optical-wireless 5G network based on generalized frequency division multiplexing (GFDM) and multi-Gbit/s communication. Dual-drive Mach-Zehnder modulator was employed, enabling...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
The DAMIC-M Low Background Chamber
Artículo
Acceso abierto Artículo CONICET Digital
Arnquist, I. et al · IOP Publishing · 2024 · ISSN 1748-0221
The DArk Matter In CCDs at Modane (DAMIC-M) experiment is designed to searchfor light dark matter (m
Idioma eng
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Open Access
5G and Beyond Positioning Over Precise Time Network Synchronization
Artículo
Acceso abierto Artículo DOAJ
Seyit Karatepe et al · IEEE · 2026 · ISSN 2169-3536
High accuracy positioning has become a key capability for fifth generation (5G) mobile networks and their future generations; however, the achievable performance is still severely limited by network time synchronization,...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
A Low Cost, High-Reliability Receiver System for Reading Passive RFID Tags
Artículo
Acceso abierto Artículo DOAJ
Nicollas R. de Oliveira et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · 2021 · ISSN 2179-1074
Abstract Radio-Frequency Identification (RFID) is one of the leading enabling technologies of the Internet of Things (IoT) at low cost and high granularity scenarios. The cost of implementing IoT applications concerns th...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
An Exploratory Analysis of Impulse Noise Filters on X-Ray Phantom Images
Artículo
Material complementario disponible Artículo DOAJ
R. E. Usha Rani et al · IEEE · 2026 · ISSN 2169-3536
Radiography or X-ray imaging is a diagnostic imaging used in medicine to produce images of inner anatomical structures such as bones, teeth, lungs, and chest organs. Impulse noise is one of the major factors that degrade...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Double Patch Antenna Array for Communication and Out-of-band RF Energy Harvesting
Artículo
Acceso abierto Artículo DOAJ
Vinícius S. Silva et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · 2020 · ISSN 2179-1074
Abstract This paper presents a patch antenna array topology for Simultaneous Wireless Information and Power Transfer (SWIPT) applications. The resulting Double Patch Antenna Array (DPA) is composed of two patch antennas ...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
Experimental Comparative Analysis of Ultra-Wideband Microstrip Low-Pass Filters With Different Topologies and Manufacturing Methods
Artículo
Acceso abierto Artículo DOAJ
Arthur O. Macedo et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · 2026 · ISSN 2179-1074
Abstract Microstrip filters are widely employed in radio fre-quency and microwave circuits due to their efficiency, easy fabri-cation, and compatibility with printed circuit board technologies. In this scenario, this wor...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma eng
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Open Access
Extreme Coverage in 5G Narrowband IoT: A LUT-Based Strategy to Optimize Shared Channels
Artículo
Material complementario disponible Artículo CONICET Digital
Luján, Emmanuel et al · Institute of Electrical and Electronics Engineers · 2020 · ISSN 2129-2136
One of the main challenges in Internet of Things (IoT) is providing communication support to an increasing number of connected devices. In recent years, the narrowband radio technology has emerged to address this situati...
Idioma eng
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Flexible fiber-laser ultrasound sensor for multiscale photoacoustic imaging
Artículo
Material complementario disponible Artículo DOAJ
Bai-Ou Guan et al · Editorial Office of Opto-Electronic Journals Group, Institute of Optics and Electronics, CAS, China · 2021 · ISSN 2096-4579
Photoacoustic imaging (PAI) is a noninvasive biomedical imaging technology capable of multiscale imaging of biological samples from organs down to cells. Multiscale PAI requires different ultrasound transducers that are ...
LCC TENDOk9wdGljcy4gTGlnaHQ~Idioma eng
Material complementario disponibleEl enlace apunta a material asociado, anexos, tablas, datos o página complementaria. No se marca como libro/texto completo.
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