FULL WAVEANALYSISOF SUPERCONDUCTING MICROSTRIP FOR MMIC APPLICATIONS E.PALECZNYJ.F. LEGIER,P. KENNIS,P. PRIBETICH Equipe Electromagnetisme des circuits Centre Hyperfrequences et Semiconducteurs U.A. CNRS n~87,USTL FLANDRES-ARTOIS 59655 VILLENEUVE D'ASCQ CEDEX,FRANCE ABSTRACT: We take into account the influence of the superconducting nature of the strip in order to study the behaviour of the superc

AN ITERATIVE METHOD FOR TIIE NONLINEAR CHARACTERIZATION HIGH Tc SUPERCONDUCTING MICROSTRIP LINE Chih-Wen Kuo. and Tatsuo Itoht ABSTRACT OF THE Value of surface resistance of the high critical temperature (Tc) superconducting thin film depends upon the power level on the film surface. Analysis of this kind of superconducting thin film microstrip line is a nonlinear problem. An iterative method co

A HIGH PERFORMANCE THE MLS - SYSTEM G.Greving, P.Kolzer * ELEVATION PHASED ARRAY ANTENNA FOR ABSTRACT A high performance MLS-phased-array design is presented using high resolution 6-bit phase shifters for the beam steering instead of the commonly used 4 bit phase resolution. Due to the small phase tolerances and the equivalently low amplitude tolerances this design produces not only systematica

DESIGN OF MULTIPLE ARdRAY FLAT MILLIMETRIC ANTENNAS IN IDG L. Ma .,T. Rozzi. .. ,S. Pennock. ABSTRACT IDG (Inset Dielectric Guide) has proved an excellent antenna medium for linear arrays. The low coupling in the near field between lines, small dimensions, pure polarization properties and the ease of manufacture make it suitable for two dimensional flat arrays which are strongly demanded. We

A FLAT LOW-COST SLOTTED WAVEGUIDE ANTENNA ARRAY u. Schulz * ABSTRACT Slotted waveguide array antennas find application in many microwave communication and radar systems which require narrow-beam or shaped-beam patterns. They are particularly useful in airborne applications where a light weight and small volume are important. These antennas may be either resonant or nonresonant arrays of various

HIGH EFFICIENCY FLAT ARRAY ANTENNAS FOR DDS RECEPTION M. Takahashi. ABSTRACT ... J. Takada. M. Ando and N. Goto A radial line slot antenna (RLSA) is a high efficiency planar array. A uniform aperture illumination for singlelayered one is realized by varying slot lengths and spacings over the aperture. This paper presents the measured performance of the high efficiency SL-RLSA's. The efficiency

RETRIEVAL OF THE DRIVING CURRENTS OF A DIPOLE ARRAY FROM THE RADIATED FIELD MAGNITUDE J.A.Lord, G.G.Cook and A.P.Anderson* ABSTRACT A technique is described for the retrieval of the driving currents of a dipole array from measured magnitude-only field data and the array configuration. The current values are determined by an iterative algorithm which has been validated by means of simulation with s

POSSIBLE ADVANTAGES IN REALISING LONGITUDINAL SLOT ARRAYS IN INHOMOGENEOUSLY LOADED RECl'ANGUIAR WAVEGUIDE J. Joubert and DA McNamara1 ABSTRACT The ability to analyse longitudinal slots in inhomogeneously loaded rectangular waveguide creates new design possibilities for slotted waveguide arrays. In order to demonstrate some of these advantages, this paper first presents results of a parametric stu

NONLINEAR DISTRIBUTED MODELLING OP LAYOUT GEOMETRY AND PROCESS DATA MULTIFINGER FETs/HEMTs IN TERMS OF R.H. Jansen* ABS'l'RAC'l' and P. Pogatzki** Multifinger FETs/HEMTs are simulated directly in terms of layout geometry. The approach developed for this uses a harmonic balance solution of the device multiple coupled nonlinear equations with input parameters set up from a combination of fiel

DESIGNING AND MODEUNG MULTI-CHANNEL HEMT GATE MIXER. R. Allam, T. Coupez, C. Kolanowskl, D. TMron and Y. Crosnler ABSTRACT The study of a multichannel HEMT mixer is presented. We discuss the specific advantages offered by multi-channel AlGaAs/GaAs HEMT for millimeter wave mixer realization. In particular, tailoring of adequate transconductance profile is used to optimize mixer performances. We s