All-optical switching possibilities for optical packet switching Andras Hámori', Miklos Serényi', Andras Dér2 , Kárpát Ferencz3 and Condor Kökényesi4 Abstract -- Extreme fast (in picoseconds range) switches are required for the task of all-optical packet switching, and the switch should stay in the selected state during the transport of the whole data stream (both the header and the payload). All-

A novel photonic ADC for radar and EW applications Luigi Pierno', Massimilian Dispenza2 and Giovanni Tonelli3 Abstract -- This paper presents a WDM architecture of a photonic analogue to digital converter (ADC) for direct RF sampling in Radar and EW Digital Receiver, the architecture is based on the parallel operation of an array of state-of-the-art electronic ADCs while the photonic sampling is a

A new definition of opto-microwave S-parameters and noise figures for a IM-DD microwave photonic link A. Bdeoui', A.-L. Billabert', J.-L. Polleux2 , C. Algani' and C. Rumelhard' Abstract -- When the optical signal of a microwave photonic link is represented by the current which would be detected by a perfect detector, a definition of opto-microwave S-parameters for the different parts of a link ca

Very small duty cycles for pulsed time domain transistor characterization Fabien De Groote', Olivier Jardel2 , Tibault Reveyrand2 , Jean-Pierre Teyssier1,2 and Raymond Quéré2 Abstract -- This paper deals with an innovative approach for pulsed measurements, particularly suited for RF time domain transistor characterization. This approach avoids the loss of dynamic range induced by classical methods

Special Issue on microwave advances in the "Journées Nationales Micro-ondes" For this special issue of the Proceedings of the European Microwave Association, selected authors of some of the best papers which have been presented at the JNM 2007 in Toulouse, France have been invited to submit a long English version of their paper. JNM stands for "Journées Nationales Micro-ondes" and with a long 25 y

SiGe HBT nonlinear phase noise modeling - X-band amplifier design Sébastien Gribaldo1,2, Laurent Bary' and Olivier Llopis' Abstract -- A nonlinear noise model of a SiGe bipolar transistor is presented. This model includes a nonlinear noise source and is able to predict the noise conversion phenomena in circuits using this transistor such as oscillator phase noise. It is based on two main low frequ

Scale changing technique: a design tool for reflectarray active cells Nathalie Raveu`, Etienne Perret2, Hervé Aubert" and Hervé Legay4 Abstract -- A new method called the Scale Changing Technique (SCT) is used in the design and optimisation of an elementary reflectarray cell presenting 1024 available states. Its competitive computation time to determine the main characteristics of a reflectarray c

Negative index metamaterial at 100 GHz Charles Croënne1, Michel-François Foulon1, Eric Lheurette1, Xavier Mélique', Maurice Gheudin2 and Didier Lippens1 Abstract -- We present the free space characterization results of a metamaterial made of Split Ring Resonators and metallic wires scaled for an operation at 100 GHz. The interpretation of the measured transmission spectra is performed by means of

Negative group delay active topologies respectively dedicated to microwave frequencies and baseband signals Biaise Ravelo, André Pérennec and Marc Le Roy -- This paper proposes and describes in details the synthesis, design and implementation of two different active topologies exhibiting negative group delay (NGD) in different frequency bands. With the first of them, gain and NGD in microwave freq

Extending the capabilities of the dual-grid finite-difference time-domain method Romain Pascaud1, Gaël Godi1, Raphael Gillard', Renaud Loison1, Joe Wiart.2 and Man-Faï Wong2 Abstract -- In this paper, improvements of the dual-grid finitedifference time-domain (DG-FDTD) method are proposed. This multiresolution approach is particularly suitable for the simulation of surrounded antenna problems. By