Home » International Journal

International Journal

Find a document written by the best international scientists in our secure database.

1368 documents found for International Journal
Characterization of a loaded high impedance surface
Fabrice Linot, Xavier Begaud, Michel Soiron, Christian Renard, Michèle Labeyrie
Published online : 01-12-2009
Article Access
View abstract
A high impedance surface (HIS) consisting of metallic square patches electrically connected one to each other with resistors is shown. Tunability of the absorption factor is achieved by the resistor value. The absorbing band of the loaded HIS is determined by the phase of the signal reflected by this structure. The main contribution of the paper is to demonstrate the absorption behavior over a wid
Opto-microwave experimental mapping of SiGe/Si phototransistors at 850 nm
Marc D. Rosales, François Duport, Julien Schiellein, Jean-Luc Polleux, Catherine Algani, Christian Rumelhard
Published online : 01-12-2009
Article Access
View abstract
This paper presents measurement results providing the mapping of the opto-microwave transfer function performed on an SiGe microwave heterojunction phototransistor (HPT). This measurements will be used to extract a guideline for designing phototransistors. A mapping of the HPT's gain in low frequency helps to estimate the shape of the optical beam used for the measurement. The study also focuses o
Implementation of electrothermal system-level model for RF power amplifiers in Scilab/Scicos environment
Florent Besombes, Raphaël Sommet, Julie Mazeau, Edouard Ngoya, Jean-Paul Martinaud
Published online : 01-12-2009
Article Access
View abstract
This paper presents a behavioral electrothermal model implementation for high RF power amplifiers dedicated to the simulation of radar application in the Scilab/Scicos environment. This model, based on the direct coupling between a behavioral electrical model and a physics-based reduced thermal model, allows to predict nonlinear effects, high-frequency memory effects, and thermal effects due to th
Label-free RF biosensors for human cell dielectric spectroscopy
Claire Dalmay, Arnaud Pothier, Mathilde Cheray, Fabrice Lalloue, Marie-Odile Jauberteau, Pierre Blondy
Published online : 01-12-2009
Article Access
View abstract
This paper presents an original biosensor chip allowing determination of intrinsic relative permittivity of biological cells at microwave frequencies. This sensor permits non-invasive cell identification and discrimination using an RF signal to probe intracellular medium of biological samples. Indeed, these sensors use an RF planar resonator that allows detection capabilities on less than 10 cells
Optically modulated III?V nitride-based high-power IMPact Avalanche Transit Time oscillator at Millimeter-wave window frequency
Moumita Mukherjee, Sitesh Kumar Roy
Published online : 01-10-2009
Article Access
View abstract
Extensive simulation experiments are carried out for the first time, to study the optical modulation of the high- frequency characteristics of III?V GaN-(gallium nitride) based top-mounted and flip-chip IMPact Avalanche Transit Time (IMPATT) oscillators at MM-wave window frequency (140.0 GHz). It is found that the un-illuminated GaN IMPATT is capable of delivering a RF power of 5.6 W with an effic
On-chip spiral inductor in flip-chip technology
Gye-An Lee, Darioush Agahi, Franco De Flaviis
Published online : 01-10-2009
Article Access
View abstract
Performance comparison is made between on-chip spiral inductor in flip-chip versus wirebond package technology. Full-wave electromagnetic simulation and on-strip measurement techniques were used to study the performance fluctuations of inductor within flip-chip environment. Results show that the performance of a flipped silicon-based spiral inductor is affected by the radio frequency (RF) current
Blocker filtering low-noise amplifier for SAW-less Bluetooth receiver system
Heesong Seo, Hyejeong Song, Changjoon Park, Jehyung Yoon, Inyoung Choi, Bumman Kim
Published online : 01-10-2009
Article Access
View abstract
A 2.4 GHz CMOS blocker filtering low-noise amplifier (BF-LNA) suitable for Bluetooth? application is presented. The circuit employs a differential amplifier topology with a current mirror active load and a notch filter. Each path amplifies differentially with the common mode input signal, but there is a notch filter rejecting only the wanted signal at one path. By subtracting the two signals from
Optimization of circular antenna arrays of isotropic radiators using simulated annealing
Munish Rattan, M.S. Patterh, B.S. Sohi
Published online : 01-10-2009
Article Access
View abstract
This paper presents the design optimization of circular antenna arrays of isotropic radiators using simulated annealing. The problem has been formulated to achieve a desired value of sidelobe level and a minimum possible value of beamwidth. This is accomplished by jointly optimizing the excitation amplitude and spacing between elements. Simulation examples have been given and comparison has been c
Measurement of the density of magnetized fusion plasma using microwave reflectometry
Jean-Claude Giacalone, Roland Sabot, Frédéric Clairet, Christine Bottereau, Diego Molina
Published online : 01-12-2009
Article Access
View abstract
About 25 years have elapsed since the first measurement by a FW-CW (called fast sweeping) reflectometer of the electronic density in magnetized fusion plasma. Substituting tube sources with solid-state components has resulted in a decrease of the sweeping time from the millisecond to the microsecond range. Based on voltage control oscillators and on active frequency multipliers, four profile refle
A 40 Gbps electro-absorption modulator integrated laser modeling method for optical transmitter in ultra-wide band radio-over-fiber systems
Frédérique Deshours, Anne-Laure Billabert, Catherine Algani, Fabrice Blache, Christian Rumelhard, Georges Alquié
Published online : 01-12-2009
Article Access
View abstract
The great interest of optical fiber links in communicating systems especially in ultra-wide band (UWB) communications has grown up in the last decade and requires co-simulation for mixed circuits design exploiting both optical and microwave domains. In this paper, we report an original modeling method of an electro-absorption modulator associated with a distributed-feedback laser to simulate an op
Negative index from asymmetric metallic cut wire pairs metamaterials
Shah Nawaz Burokur, André de Lustrac
Published online : 01-12-2009
Article Access
View abstract
Metamaterials made of exclusively metallic cut wire pairs have been experimentally demonstrated to exhibit a negative refractive index at optical frequencies. However, other related works on slightly different wire and plate pairs have not shown a negative index. In this paper, we present the analogy between previously reported S-shaped metamaterials and asymmetric cut wire pairs by a simple unify
SIP antenna on 0.13 µm SiGe technology at 79 GHz for SRR automotive radar
Yenny Pinto, Christian Person, Daniel Gloria, Andreia Cathelin, Didier Belot, Sébastien Pruvost, Robert Plana
Published online : 01-12-2009
Article Access
View abstract
This paper describes the analysis and the design of an integrated antenna on 0.13 µm SiGe BICMOS technology. A non-resonant dipole antenna integrated on SiGe is electromagnetically coupled to a radiating element reported on a printed circuit board (PCB) substrate. This integrated solution, also compatible with system in package (SIP) concept, provides significant improvements with respect to direc
An RF spectrometer for fast wide band measurement
Simon Hemour, Florence Podevin, Pascal Xavier
Published online : 01-12-2009
Article Access
View abstract
A new type of spectrum analyzer using RF interferometry is presented. The stationary wave integrated Fourier transform spectrometer is dedicated to the measurement of transient wideband signals. The spectrometer is mobile and cheap. It consists of spatial samplers placed along a waveguide ended by a short circuit. The standing wave caused by the short circuit is sampled and the spectrum is obtaine
MRF volume 1 issue 6 Cover and Front matter
Published online : 01-12-2009
Article Access
View abstract
MRF volume 1 issue 5 Cover and Back matter
Published online : 01-10-2009
Article Access
View abstract
MRF volume 1 issue 5 Cover and Front matter
Published online : 01-10-2009
Article Access
View abstract
IJMWT special issue on the 2009 National Microwave Days in France
Pascal Xavier, Béatrice Cabon, Dominique Rauly
Published online : 01-12-2009
Article Access
View abstract
MRF volume 1 issue 6 Cover and Back matter
Published online : 01-12-2009
Article Access
View abstract
0 document found for International Journal

ArtWhere Création de site Internet