Wlan Performance
Mostrando 1-12 de 20 artigos, teses e dissertações.
-
1. Quad-Band Printed Antenna for Portable WLAN Applications
Abstract This paper presents a novel printed monopole antenna for quad-band operation in four WLAN bands: ISM 2.4 GHz, 5.2 GHz, 5.6 GHz, and ISM 5.8 GHz. This antenna is compact, thin, lightweight, easy to manufacture, and suitable for portable devices. It is composed of a folded strip radiator and two parasitic strips printed on a partially grounded substra
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 19/06/2019
-
2. A Compact Dual-Band CPW-Fed Planar Monopole Antenna for 2.62–2.73 GHz Frequency Band, WiMAX and WLAN Applications
Abstract In this paper, we present a compact and low-profile monopole antenna with a simple structure for the 2.6–2.73 GHz frequency band, the Worldwide Interoperability for Microwave Access (WiMAX) and the Wireless Local Area Network (WLAN) applications. The first configuration of our antenna mainly consists by three radiating elements: inverted L-shaped
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-04
-
3. A Compact UWB Monopole Antenna with Rejected WLAN Band using Split-Ring Resonator and Assessed by Analytic Hierarchy Process Method
Abstract The design of a compact microstrip line-fed Ultra-wideband (UWB) monopole antenna with a notched band characteristic is presented in this paper. The rejection frequency band occurs around 5-6 GHz, which is appropriate for wireless local area network (WLAN) applications and is obtained by a split-ring resonator on the antenna ground plane. The propos
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-04
-
4. Investigation of Dosimetry in Four Human Head Models for Planar Monopole Antenna with a Coupling Feed for LTE/WWAN/WLAN Internal Mobile Phone
Abstract The objective of the present study is to evaluate the Specific Absorption Rate (SAR) within the human head model exposed to the radiation of planar monopole antenna with T-shaped coupling feed and an inductive shorting strip. The presented design has a compact structure, a planar configuration and occupying a small size of 36×20mm2. Two wide bands
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-04
-
5. A Performance Evaluation of WLAN-Femtocell-LTE beyond the Capacity Crunch. Does Femtocell have to overcome WLAN or can they coexist in HetNets?
Abstract This paper originates from a practical experiment based on Mesh Networks. The promising results obtained from this experiment prompted us to discuss in greater depth whether Wireless Local Area Networks (WLAN) are still useful for current communications. This means that on the one hand femtocells can be defined as small base stations that use the sa
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-12
-
6. Performance optimization of microstrip antenna array using frequency selective surfaces
This paper presents the application of frequency selective surfaces in antenna arrays as an alternative to improve radiation parameters of the array. A microstrip antenna array between two FSS was proposed for application in WLAN and LTE 4G systems. Several parameters have been significantly improved, in particular the bandwidth, gain and radiation efficienc
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2014-06
-
7. Redes de equipamentos sem fio de uso pessoal: comparação de tecnologias emergentes e análise de tendências. / Wireless network equipment for personal use comparison of emerging technology trends and analysis.
No mundo globalizado em que vivemos os sistemas, as aplicações e as pessoas precisam estar conectadas permanentemente à Internet, e a uma variedade de redes de comunicação, com vários dispositivos, simultaneamente. O ideal, devido a esse contexto, seria ter um único dispositivo com uma única interface de rede e um único programa que permitisse fazer
Publicado em: 2010
-
8. Benefícios do padrão IEEE 802.11e para tráfego de tempo real em redes WLAN não estruturadas. / Benefits of IEEE 802.11e Standard for real-time traffic in WLAN ad hoc networks.
The use of wirelles networks in most various sectors has been growing drastically in past years Allied to the wireless networks use, the diversification of applications and services provided can be directly verified whether by home or corporate users. This alliance contributes significantly to the needs of technology development which offer the quality of se
Publicado em: 2009
-
9. Análise do desempenho de WLAN com a implementação dos protocolos de segurança WEP e WPA/TKIP / Performance analysis of WLAN with the implementation of WEP and WPA/TKIP security protocols
Nowadays, the use of the wireless network technology has grown mainly motivated by the price of equipments, ease of installation, network maintenance and expansion of technical safety. The more you use the wireless network resource, the better should be the treatment related to its safety aspect. As the security level increases, the amount of information tra
Publicado em: 2008
-
10. Análise de desempenho de composição de redes em redes de ambiente / PERFORMANCE ANALISYS OF NETWORK COMPOSITION ON AMBIENT NETWORKS
Since the telecommunications scenario become highly diverse, for instance, because of the development of heterogeneous access technologies (like WLAN, WiMAX and UMTS) and new types of networks, it is necessary a uniform procedure for cooperation between these networks. A network composition consists exactly of this uniform and dynamic procedure to achieve co
Publicado em: 2008
-
11. Métrica para análise da qualidade de vídeo transmitido em redes sem fio / Metrics to analyze the quality of videos transmitted through wireless networks
The goal of this work is to propose a metric to analyze the quality of videos transmitted through wireless networks. A wireless network is a degenerative means to transmit data given its huge instability, which affects transmitted videos. The present proposal adds a technical network parameter, known as jitter, to clients opinion. For these studies a video w
Publicado em: 2008
-
12. WLAN 802.11 anomaly mitigation using SNR to control backoff contention window / Minimização do efeito de anomalia em redes IEEE 802.11 usando SNR para controlar o CW
Ethernet exists more than 20 years and the wireless Ethernet, known as IEEE 802.11, for more than seven years. Extensions of the original standard, as IEEE 802.11g, are been created to guarantee higher transmission rates. However, some conditions there are that affect the performance of the network. One of them, known as Performance Anomaly, occurs when in a
Publicado em: 2007