Concept

Umbrella antenna

Related publications (8)

3D, LTCC-type, high-frequency magnetic sensors for the TCV Tokamak

Duccio Testa, Matthieu Toussaint, Gaël André Léon Farine, Thomas Maeder, Caroline Marguerite Jacq, Adrien Aymeric Thibault Corne

High-frequency, 3D magnetic sensors have been designed and manufactured in-house for installation on the Tokamak a Configuration Variable (TCV). To optimize the in-vessel volume occupation, the sensors are based on combining the Low Temperature Co-fired Ce ...

Elsevier Science Sa2015

Experimental investigation on seismic behaviour of slab-column connections

Aurelio Muttoni

Code design of slab-column connections to resist seismically induced drifts is currently based on empirical relationships for both moment and deformation capacity. The results of tests on slab-column connections are however sensitive to the conception of the test setup. This paper presents a new setup configuration as well as first results of an experimental campaign carried out at EPFL. Within this campaign slabs without shear reinforcement will be subjected to constant vertical loads and increasing seismi

2014

Thermal characterization of an LTCC module for miniature atomic clock packaging

Thomas Maeder, Peter Ryser

This paper presents the design and thermal characterization of a 15 × 22 mm2 LTCC module dedicated to the packaging of the elements of a miniature atomic clock. This module acts as a carrier for the components of the clock as well as temperature controller; this is particularly attractive since each component of the atomic clock requires precise and well defined working temperatures. For the thermal characterization of the designed module, various thermal simulations have been performed, by finite-element m

IMAPS / ACerS2012

UWB antenna design and ray tracing method for robot localization

Anja Skrivervik

This poster presents a new base station antenna design and preliminary results on electric field mapping for localizing a UWB-MICS robot in an arena. A batch of new base station antenna prototypes, was built and measured at EPFL - LEMA. A microstrip-fed compact monopole design, built in the inexpensive FR4 substrate, was chosen. Reflexion coefficient measurements and radiation pattern simulations meet the project specifications. The presented prototype is electrically small and therefore affected by the fee

2011

Optical Wire Antennas : Near-Field Imaging, Modeling and Emission Patterns

In this thesis we study the properties of optical wire antennas. As experimental method for our investigations we use apertureless near-field optical microscopy. This technique achieves high spatial resolution well beyond the diffraction limit by utilizing ...

EPFL2010

Polarization Issues with High Power Injection and Low Power Emission in Fusion Experiments

Timothy Goodman

All tokamak experiments using ECCD require setting of the beam elliptical polarization for proper coupling to the plasma. This is done either in the matching optics unit (MOU) at the output of the gyrotron, or in a couple of miter bends of the transmission line. Similarly, oblique ECE receivers require selection of the correct elliptical polarization to provide localized measurements. For the TCV tokamak at the CRPP, gyrotron and oblique-ECE polarizers are characterized during either high- or low- power tes

AIP Conference Proceedings2009

On the Use of Cascade Structure to Correct Impulsive Noise in Multicarrier Systems

We propose a new decoding algorithm based on a cascade structure for impulsive noise correction in multicarrier systems such as Orthogonal Frequency Division Multiplexing (OFDM) based systems. This new cascade structure based algorithm has the advantage to ...

2008

Dynamics of optical injection of charge and spin currents in quantum wells

Benoît Marie Joseph Deveaud, Marc-André Dupertuis, Daniel Marti

We develop a dynamical theory for the optical injection of charge and spin current originating from the interferences between two coherent laser pulses of frequencies omega and 2omega. Multiband Bloch equations which include one- and two-photon interband transitions are derived. They also account for ac Stark shifts and intersubband two-photon transitions. The model is used to describe the case of time-dependent charge and spin current injection in a symmetric GaAs/AlGaAs quantum well. A comparison to the b

American Physical Society2004

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Related publications (8)