A 2-18 GHz MONOLITHIC 400 mW POWER AMPLIFIER E. WATRIN, P. CHAUMAS, I. TELLIEZ, B. WROBLEWSKI ABSTRACT The design and the measured performances of a broad band MMIC power amplifier are discussed. The chip is a 2-18 GHz distributed amplifier which demonstrates an input and output VSWR better than 1.5:1.An output power of 400 mW with an associated gain of 4.5 dB and a power efficiency of 20% are

DIGIT AL FIBER OPTIC LINKS USING NOVEL LED TRANSMITTER RECEIVER/CLOCK RECOVERY CIRCUITS ABOVE 1.25 GB/S J.Y. Lin*, T. Daniel*, A.S. Daryoush* , V. Oershman+, and W. Rosen + ABSTRACT AND A high speed fiber optic link is described which uses an LED-based optical transmitter and novel receiver/clock recovery circuit to achieve high bandwidth with low power consumption over extended operating temper

ABOVE 8GHZ STATIC T-FLIP-FLOP OPERATION USING Ft=22.9GHZ J.RiishS1lj* P. Danielsen* and GAAS MESFETS ABSTRACT Abstract: A static SCFL Toggle Flip-Flop GaAs IC having maximum operating frequency of Fdiv=8.25GHz has been designed using a commercially available GaAs MESFET foundry service. The average Ft for the present wafer is Ft=22.9GHz giving a very high Fdiv/Ft-ratio of Fdiv/Ft=0.36. In additi

SPACE QUALIFICATION OF THE RADIOASTRON 22 GHz RECEIVER P.Piironen*, J.Mallat*, A.Raisanen*, E.Siivola**, J.Takala**, P.Jukkala***, P.Sailamaki***, H.Somerma***, J.Ylinen*** ABSTRACT The Radioastron space VLBI satellite, expected to be launched in 1995, will have on board four sensitive two-channel radiometers. Finland is responsible for the 22 GHz receiver. The most important properties of the

PROCESSING TECHNIQUES TO IMPROVE MICROWAVE IMAGES FOR BIOMEDICAL J.Ch.Bolomey*, ABSTRACT APPLICATIONS dA.Joisel*, Ch.Pichot*, G.Gaboriaud** This paper deals with the improvement of the quality of images obtained at 2.45 GHz, by means of a planar microwave camera for biomedical applications. The results provided by standard spectral techniques, classically used for diffraction tomography re

ELECTROMAGNETIC CALCULATIONS USING THE FDTDMETHOD FOR THE ANALYSIS OF WAVEGUIDE APPLICATORS FOR MICROWAVE HYPERTHERMIA L. Martensl, J. Van Hesel, P. De Langhel, D. De Zutterl, and C. De Wagter2 AllSIRACI Electromagnetic calculations for waveguide applicators using the Finite Difference Time Domain (FDTD) method are presented. The algorithm is applied to a water-filled applicator and the computed

The Near Field and SAR Pattern of an Insulated Asymmetrical Dipole Applicator in a Dissipative Inhomogeneous Medium Jian TENG, Hongqu YAN, Danielle VANHOENACKER, Andre VANDER VORST'" Abstract This paper presents a method to calculate the near field and the specific absorption rate (SAR) pattern in a cylindrical dissipative medium inside which an insulated asymmetrical dipole applicator is placed

TECHNIQUES FOR NONINVASIVE RECONSTRUCTION OF INHOMOGENEOUS LOSSY DIELECTRIC TARGETS USING INTERROGATING MICROWAVES S. Caorst, G. L. Gragnani*, and M. Pastorino* ABSTRACT A class of microwave imaging methods based on integral equations and the moment method is considered. In particular, a pseudoinversion-based multiview approach and an alternative version making use of the first-order Born approxi

ACCURATE FINITE ELEMENT FORMULATION MUL TIAXIAL PLANAR DISCONTINUITIES OF M. F. WONG-, o. PICON- and V. FOUAD HANNA- ABSIBACI An accurate three-dimensional finite element formulation using edge elements is presented and applied on the characterization of multiaxial planar discontinuities. 

THE COMPLETE SPECTRUM APPLICATION TO SCATTERING OF COPLANAR PROBLEMS. WAVEGUIDE AND ITS T.Rozzi*, G. Gerint, P.Sewell*, F. Moglie*, M. Ridolfi* . ABSTRACT The fundamental and the parasitic mode of coplanar guide, fig. 1), have been extensively investigated [1]. Due to its open nature, the guide also features a continuum of radiation modes both in air and in the dielectric substrate which is