AN IMPROVED METHOD NON-LINEAR MODELLING G.Leuzzi. OF PARASITIC OF MICROWAVE EXTRACTION FOR POWER MESFET's , K.Deiseroth+ , F.Giannini. ABSTRACT Modern non-linear CAD techniques require accurate models of active components for the analysis of non-linear circuits. An improved technique of model extraction from measurements is presented, which accounts for capacitive parasitics in a more physical

ACCURATE HEMT MODELING FOR NON-LINEAR SIMULATION B. Rattay *, M. Hubner *, J.P. Teyssier **, R. Quere ** ABSTRACT: A complete extraction method to define non-linear models for HEMT devices has been developped. The method is based on broadband small signal S-parameter and DC pulse measurements. Because of the self-consistent approach used for the parameter extraction, the complementarity of bo

AN INVESTIGATION OF EFFICIENCY LIMITING MECHANISMS IN GaAs MESFET AMPLIFIERS. T. A. Winslow and R. J. Trewl ABSTRACT An advanced large signal, physics based MESFET model is used to investigate the effects of gate-drain breakdown on high efficiency amplifier operation. As the drain bias relative to breakdown and the input power drive level are varied, the device input and output impedances shift c

WHISPERING GALLERY MODE RESONANCE IN A DIELECTRIC MILLIMETER THROUGH OPTICAL WAVE APPLICATION DISK FOR K.MATSUMURA* ABSTRACT Resonance characteristics of the Whispering Gallery (WG) Mode in a large dielectric disk is investigated by three dimensional analysis and X-band model experiments. In this study, disk diameter is more than ten times (for millimeter wave case) to hundred times (for optica

A SUSPENDED STRIPLINE TO MICROSTRIP TRANSITION MULTILAYER TECHNIQUES Wolfgang Schwab, Wolfgang Menzel* USING ABSTRACT A suspended stripline to microstrip transition using multilayer techniques is investigated theoretically and experimentally. With this transition the advantages of both transmission line types can be combined in one integrated circuit. Coupling of the lines is obtained by overlap

MULTI-LAYER THICK-FILM TECHNOLOGY: A CONVENIENT WAY TO DESIGN COMPACT AND EFFICIENT MICROWAVE COMPONENTS C. PERSON, J.Ph. COUPEZ, D. BOURREAU, S. TOUTAIN (e) ABSTRACT: In current communication systems, significant efforts are being made concerning the miniaturization of the different microwave integrated sub-functions involved. In addition to size considerations, acceptable ( like temperatu

A NEW TRANSITION Wilfried ABSTRACT Grabherr FROM MICROSTRIP and Wolfgang LINE TO RECTANGULAR Menzel* WAVEGUIDE A simple transition from microstrip to rectangular waveguide using an aperture coupled patch antenna radiating into the waveguide is proposed. In addition, two slightly modified versions are discussed, having some advantages with regard to ease of fabrication and therefore being more

COUPLED DISPLACED MICROSTRIP LINES THROUGH SLOT IN A COMMON GROUND PLANE Toshio Wakabayashi* and Tatsuo Itoh** A RECTANGULAR ABSTRACT Laterally displaced microstrip lines which are coupled through a rectangular slot in a common ground plane are analyzed. Microstrips are displaced each other from the center of the slot. The analysis is based on the spectral domain method and the reciprocal theore

THE EFFECT OF COMPLEX MODES ON THE PERFORMANCE OF FINLINE CIRCUIT COMPONENTS A. Sarhan * , J. Marquardt, Abstract * A. S. Omar** The effect of overlooking complex modes on the determination of the equivalent circuit for some finline discontinuities as well as the performance of finline impedance transformers and band-pass filters is investigated numerically. It is shown that this effect i

An Error Tolerant MMIC Based Phase/Gain Control Module For Beam Forming Networks L M Devlin*, B J Buck *, C G Eddisont, D Leistnertt, G Brauntt Abstract A Monolithic Microwave Integrated Circuit (MMIC) based gain and phase control module for use in Beam Forming Networks (BFNs) is detailed. Gain and phase are digitally controlled with 25dB of gain control range, 360. phase control range, 5 bit re