arXiv subjects

B. Sauviac

Publications and source records attributed to B. Sauviac.

4 recordsLinked to original sources

arXiv2023

Rectangular empty waveguide transition for realizing an electromagnetic jet based measuring device

Spheres, cylinders, cones, cuboids have been used in the literature to generate photonic jets at the back of these structures when illuminated by plane waves. We are working on the generalization (which we call electromagnetic jet) of this concept in guided structures in the microwave domain. The electromagnetic jet can be obtained from a rectangular waveguide loaded with dielectric. In order to use the electromagnetic jet as a localized measurement tool, it is therefore necessary to address the adaptation between an empty rectangular waveguide and a loaded guide. This is the object of the work presented here, where two solutions are compared.

physics.class-ph↗

arXiv2023

Electromagnetic jet for characterization applications

This comparative study allows to evaluate the performance of an electromagnetic jet to determine the electromagnetic response of materials, without being in usual far field conditions. In this work, the reflection coefficient of a substrate with ground plane, calculated analytically, is compared with that determined in simulation by the electromagnetic jet. The results show a satisfactory agreement after calibrating the simulated reflection coefficient at the focal point of the jet. Thus, we were able to find, by a local measurement, data consistent with a classical free space type measurement.

cond-mat.mtrl-sci↗

arXiv2008

Interoperability between Heterogeneous Federation Architectures: Illustration with SAML and WS-Federation

Digital identity management intra and inter information systems, and, service oriented architectures, are the roots of identity federation. This kind of security architectures aims at enabling information system interoperability. Existing architectures, however, do not consider interoperability of heterogeneous federation architectures, which rely on different federation protocols.In this paper, we try to initiate an in-depth reflection on this issue, through the comparison of two main federation architecture specifications: SAML and WS-Federation. We firstly propose an overall outline of identity federation. We furthermore address the issue of interoperability for federation architectures using a different federation protocol. Afterwards, we compare SAML and WS-Federation. Eventually, we define the ways of convergence, and therefore, of interoperability.

cs.CR↗

arXiv2003

Toward creating isotropic microwave composites with negative refraction

The properties of artificial isotropic microwave composites which would possess simultaneously negative permittivity and permeability are studied theoretically. Four kinds of composites are considered. Two of them concern media with split-ring resonator particles with different particle arrangements. The other two are realized with Omega particles. An analytical antenna model of the electromagnetic behavior of a split-ring resonator (SRR) is suggested and verified by numerical simulations. Next, material parameters of composite media made with SRR or Omega particles are calculated. It is shown that the Omega-composites are more prospective for obtaining negative real values of permittivity and permeability than the split-ring resonators.

cond-mat.mtrl-sci↗