Results 11 to 20 of about 477 (169)
Analysis and Design of Cavity-Backed Probe-Fed Hybrid Microstrip Antennas on FR4 Substrate
International Journal of Antennas and Propagation, 2015 A novel cavity-backed probe-fed linearly polarized microstrip antenna based on the concept of hybrid radiators is proposed and implemented. The resulting flush-mounted antenna exhibits symmetrical bandwidth, low cross-polarization radiation in the H ...
D. C. Nascimento +3 more
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Analytical Model for Predesigning Probe-Fed Hybrid Microstrip Antennas
International Journal of Antennas and Propagation, 2018 Based on the equivalent resonant cavity model, an effective analysis methodology of probe-fed hybrid microstrip antennas is carried out in this paper, resulting in a better understanding of the parameter interrelations affecting their behavior. With that,
Nilson R. Rabelo +6 more
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Cuadernos de Geografía: Revista Colombiana de Geografía, 2023 El estudio analizó, desde una perspectiva crítica, las posiciones sobre la movilización ciudadana ante el riesgo por tecnología de antenas de comunicación móvil 4.5G en su instalación en la Comuna 6 del nororiente de Colombia, en el contexto de ...
Juan Diego Villamizar Escobar +1 more
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International Journal of Climatology, Volume 43, Issue 4, Page 1935-1954, 30 March 2023., 2023 This study on fog at the Mediterranean coast of the Iberian Peninsula with data from 2003 to 2012 has obtained the following findings on its collection potential: marked annual and seasonal variability, great capacity on days with no rain, and the important role of altitude.
David Corell +2 more
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Managerial and Decision Economics, Volume 43, Issue 8, Page 3568-3575, December 2022., 2022 The autonomous public mass media must strengthen the linguistic and cultural diversity of a region. It is questioned whether its financing and management model is appropriate in view of the economic problems it often faces. It has been studied the efficiency of 11 Spanish public broadcasting channels using data envelopment analysis to know which ones ...
Javier Cifuentes‐Faura
wiley +1 more source
Revista Tecnologia, 2023 A demanda por novas faixas de operação de frequência e a construção de sofisticados circuitos integrados de micro-ondas de baixo custo e de fácil fabricação tem instigado pesquisadores da área de telecomunicações a buscarem por novos materiais, novas ...
Juliete da Silva Souza +1 more
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Victims crossing overflowing watercourses with vehicles in Spain
Journal of Flood Risk Management, Volume 13, Issue 4, December 2020., 2020 Abstract Heavy rainfall causes many watercourses to overflow. In these circumstances, crossing by car even on a road, can be extremely dangerous; however, dozens of drivers are swept away every year in their vehicles. This paper analyses this type of accident in Spain between 2008 and 2018, recording the date, location, number of victims, age and ...
Álvaro Enríquez‐de‐Salamanca
wiley +1 more source
Revista Catalana de Dret Ambiental, 2010 Los campos electromagnéticos (CEM) generan una amplia preocupación social, que ha llevado a un rechazo masivo a la instalación de antenas de telefonía móvil.
Antonio Eduardo Embid Tello
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Projeto e análise de antenas patch compactas com contornos fractais de Koch
Revista Principia, 2008 Este artigo apresenta uma proposta para a miniaturização de antenas em microfita, do tipo inset-fed patch retangular, através da aplicação de curvas fractais de Koch aos seus contornos retilíneos.
Paulo Henrique da Fonseca Silva +2 more
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Metasuperficies en el diseño de antenas: una introducción
Ciencia e Ingeniería Neogranadina, 2022 En los últimos años las metasuperficies se han perfilado como nuevos materiales que pueden utilizarse de manera eficiente en diversos campos prácticos. Aplicaciones como cambio de polarización, antenas, superficies de impedancia y cámaras anecoicas han ...
Gina M. Moreno +2 more
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