Concept

Puissance apparente rayonnée

Publications associées (53)

Analysis and optimization of passive UHF RFID systems

Radio Frequency IDentification (RFID) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders. An RFID tag is a small object that can be attached to or incorporated into a produc ...

EPFL2006

Power line communications

Emmanuel Marthe

With the deregulation of the electricity and telecommunications markets, a great deal of new operators providing some innovative services have appeared. In the telecommunications' field, the promise of broadband Internet access with easy installation proce ...

EPFL2005

Remotely powered addressable UHF RFID integrated system

Catherine Dehollain, Michel Declercq, Jari-Pascal Curty

This paper presents a fully integrated remotely powered and addressable radio frequency identification (RFID) transponder working at 2.45 GHz. The achieved operating range at 4 W effective isotropically radiated power (EIRP) base-station transmit power is ...

2005

A Joint PHY/MAC Architecture for Low-Radiated Power TH-UWB Wireless Ad-Hoc Networks

Jean-Yves Le Boudec, Ruben Merz, Jörg Widmer

Due to environmental concerns and strict constraints on interference imposed on other networks, the radiated power of emerging pervasive wireless networks needs to be strictly limited, yet without sacrificing acceptable data rates. Pulsed Time-Hopping Ultr ...

2005

A Joint PHY/MAC Architecture for Low-Radiated Power TH-UWB Wireless Ad-Hoc Networks

Jean-Yves Le Boudec, Ruben Merz, Jörg Widmer

2004

A Rate-Adaptive MAC Protocol for Low-Power Ultra-Wide Band Ad-hoc Networks

Jean-Yves Le Boudec, Ruben Merz, Jörg Widmer

Recent theoretical results show that it is optimal to allow interfering sources to transmit simultaneously as long as they are outside a well-defined exclusion region around a destination and to adapt the rate to interference. In contrast, interference fro ...

2004

Lifetime of an emitting dipole near various types of interfaces including magnetic and negative refractive materials

Olivier Martin

A classical electromagnetic calculation of the lifetime of an emitting electric dipole near a material slab is presented. The lifetime is deduced from the imaginary part of the electric field Green's tensor associated with the stratified medium. The method ...

2004

Comparison between ray-tracing simulations and bi-directional transmission measurements on prismatic glazing

Marilyne Andersen, Jean-Louis Scartezzini

Evaluation of solar heat gain and daylight distribution through complex window and shading systems requires the determination of the bi-directional transmission distribution function (BTDF). Measurement of BTDF can be time-consuming, and inaccuracies are l ...

2003

Problems related to the definition of appropriate limits for radiated emissions due to power line communications

Michel Ianoz

Feasibility studies performed in the last years have shown that the use of the low voltage distribution network can be used for data transmission. The main problem is the possible radiation of electromagnetic field and the disturbances which can affect rad ...

2002

Light distribution through advanced fenestration systems

Marilyne Andersen

Most energy-saving applications of advanced fenestration systems, e.g. solar blinds, novel types of glazing and daylight redirecting devices, require a precise knowledge of their directional light-transmission features. These photometric properties are des ...

Taylor & Francis2002

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