DETERMINATION OF THE MESFET RESISTIVE PARAMETERS USING RF-WAFER PROBING R. VogeL * ABSTRACT A simple method has been proposed to measure the resistive parameters of MESFET's. An equivalent circuit of the forward biased FET valid in a low frequency limit which allows to determine the gate, source and drain parasitic resistances from the measured parameters was developed. The ideality factor

ACCURATE G. Boeck, ABSTRACT SPICE MODELLING OF GAAS-MESFETS FOR USE IN GAAS-IC DESIGN P.-W. von Basse, J.-E. MUller, W. Kellner* An improved GaAs-MESFET, curve-fitting model has been developed and implemented into the source code of SPICE 2G. 6. The advantages of our model compared to the well known Curtice model are shown. We describe our sequential procedure to find the fit functions and to ex

A NEW, CIRCUIT-ORIENTED CAD APPROACH FOR THE SMALL- AND LARGE-SIGNAL SIMULATIONOF GAASMESFETS BASED ON PHYSICAL MODELS Giovanni Ghione, Carlo U. Naldi, Dipartimento di Elettronica, Politecnico di Torino, Corso Duca Abruzzi 24, Torino, Italia Fabio Filicori Dipartimento di Elettronica Informatica e Sistemistica Universita' di Bologna, Viale Risorgimento 2, Bologna, ABSTRACT Italia A strategy i

NON-LINEAR MESFET MODELLING A.K. Jastrzebski* ABSTRACT A new technique for non-linear modelling of MESFETs has been developed based on the extraction of both linear and non-linear model parameters in one optimization step. The technique eliminates various modelling inconsistency problems and can be used for MESFETs with dispersi ve model parameters. The only required device measurements are smal

MICROWAVE REMOTE SENSING TECHNIQUES FOR MEASURING THIN SURFACE FILMS M.A. Flemming and G.N. Plested ABSTRACT Microwave techniques for the detection and measurement of thin surface films are described. These are based on comparison of the reflection coefficients of vertically and horizontally polarised signals from the surface under test. The design of two types of instrument is described, o

USE OF A MILLIMETER WAVE RADIOMETER PEDESTRIAN AND BICYCLE TRAFFIC FOR DETECTING Petri Jukkala*, Juhana Ylinen*, Antti Raisanen+ ABSTRACT A total-power radiometer at 48 GHz has been constructed and used for detecting pedestrian and bicycle traffic. The high operating frequency was selected in order to obtain a high angular resolution. The best way to distinguish a human being from the back

THE ADVANCED MICROWAVE IMAGING SENSING RADIOMETER (AMIR) FOR SATELLITE REMOTE APPLICATIONS B. Bizzarri *, D. Martinez **, E. Nisi *** ABSTRACT The results of the Phase to A study of AMIR are presented. Polar AMIR might program level be an for all Italian Earth's contribution Observation. the international into Platform Its objective is to bring a pre-operational or operationa

X-BAND SYNTHETIC FOR EXPERIMENTS Herwig APERTURE RADAR (X-SAR) AND ITS SHUTTLE-BORNE APPLICATION ~ttl* and Francesco Valdoni** ABSTRACT The German Aerospace Research Establishment (DFVLR) and the Consiglio Nazionale delle Ricerche/Piano Spaziale Nazionale (CNR/PSN) are responsible for the design of X-SAR. This instrument is presently in the development phase in the German and Italian space

ELECTROMAGNETIC ARRAY ENVIRONMENT Lodone* CHARACTERISATION OF SLOTS AND THEIR INTERACTIONS IN AN Giovanni ABSTRACT This aimed building assesment code which reduce work outlines the theoretical array. Some framework examples The final stage of a software waveguide including result slots tool as at analysing blocks the behaviour of longitudinal of a planar useful an experimental is a comput

A NOVEL PHASED ARRAY OF PRINTED-CIRCUIT LEAKY-WAVE LINE SOURCES P. Lampariello* and A. A. Oliner** ABSTRACT A proposed scan in novel and sector in linear analyzed space by The phased array that furnishes frequency or line leaky-wave line sources is a two-dimensional scan within a certain electronic scan in elevation and phased antenna. The complete antenna account all mutual coupling