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Mostrando ítems 21-30 de 106
Nuevas consideraciones al diseño de conversores de modos TE0m-TE0n para aplicaciones de alta potencia a frecuencias milimétricas
(1996)
Contribución a congreso / Biltzarrerako ekarpena,
In this work, the new results of a study about the general Kovalev’s coherence principle are
presented. As we will show here, despite Kovalev presents the coherence principle as general, only the
fundamental case can be ...
Consideraciones de paraxialidad en modos gaussianos de orden superior
(1996)
Contribución a congreso / Biltzarrerako ekarpena,
Usually, the gaussian beam modes are assumed to be solutions of the wave equation in the free
space. Nevertheless, these modes are obtained supposing some paraxial restrictions. Therefore, we will
have to check if our ...
SCATTMAT: herramienta C.A.D. para el análisis de componentes en guía de onda circular con variaciones simétricas del radio
(1996)
Contribución a congreso / Biltzarrerako ekarpena,
In this paper, a C.A.D. tool to simulate simmetrical radial deformation microwave devices, using
the modal analysis and scattering matrix techniques is presented. The code has been developed in C++
language, working with ...
Optimum horn antennas for high order mode beam waveguides
(1995)
Contribución a congreso / Biltzarrerako ekarpena,
Higher order free space modes can be considered as serious candidates for power millimeter wave transmission in advanced material processing by using medium power CW gyrotrons. These modes can be propagated in a beam ...
High order mode beam waveguide for technological medium power millimeter wave applications
(1995)
Contribución a congreso / Biltzarrerako ekarpena,
The use of medium power millimeter wave CW gyrotrons (10-
30 kW and 30-100 GHz) has several potential applications in
advanced materials processing. Since a stochastic field
distribution in the applicator is desirable ...
Paraxiality considerations of higher order gaussian modes
(1996)
Contribución a congreso / Biltzarrerako ekarpena,
Frequently, gaussian modes are used as free space wave equation solutions. This is not true since
they are obtained assuming certain paraxial character in them.
In this paper, we present an original study of the condition ...
Upper bounds on scattering processes and metamaterial-inspired structures that reach them
(IEEE, 2014)
Artículo / Artikulua,
The physical limitations on time-harmonic scattering processes are investigated on the basis of the optical theorem. Previously derived least upper bounds on the total scattering and absorption cross-sections are obtained ...
Superbackscattering antenna arrays
(IEEE, 2015)
Artículo / Artikulua,
This article discusses the theory, design and practical implementation of superbackscattering antenna arrays. In analogy with Uzkov’s maximal directivity theorem, it is demonstrated that the maximal backscattering ...
New approach to the design of corrugated horn antennas
(1997)
Contribución a congreso / Biltzarrerako ekarpena,
In this paper, we present two new corrugated horn antenna designs in circular waveguide. The first one is a
converter horn antenna from monomode circular waveguide TE11 to corrugated waveguide HE11 mode in a very efficient ...
On the determination of the phase center of gaussian horn antennas
(1998)
Contribución a congreso / Biltzarrerako ekarpena,
Gaussian horn antenna designs have experimentally demonstrated excellent performance to produce a very pure Gaussian beam mode with extremely low sidelobes and crosspolarization levels. These results make very attractive ...