PLANAR GaAs MOTT LOW NOISE nnn-WAVE (35 AND 85 GHZ) MIXER DIODES + SUMMERS, J.M. + WOODCOCK R.K. SURRIDGE, * J.G. ABSTRACT Conversion losses of 5.0 dB have been achieved at 35 GHz, with SSB noise figures of 6 dB (including 1 dB IF) using coplanar Mott diodes in finline balanced mixers. [lJ The variation of noise figure with local oscillator power is significantly less than for conventional Sc

STUDY OF VARIABLE BY COUPLED STRIP LINES OF DEPLETION ON SEMICONDUCTOR LAYER DETERMINATION BAUDRAND Henri & Emmanuel TONYE(~) ABSTRACT A numerical Green's function is used to obtain the depletion layer-profile in two dimensions in a semi-conductor. The depletion layer profile is initially estimated from one dimensional Schockley approximation. Once the depletion layer is given, the char

APPLICATIONS J.P. VILLOTTE OF TUNABLE SUSPENDED MICROSTRIP LINES. - M. AUBOURG - G. KOSSIAVAS - Y.GARAULT.* ABSTRACT Finite element method is applied to analyze tunable suspended lines. Two applications of single and coupled lines are presented: . . microstrip transitions between classical lines wideband tapered couplers. / 

COUPLING AND IMPEDANCE BETWEEN LINE AND GROUND ELECTRODES ON GaAs ; IMPLICATIONS Marina FOR MMIC DESIGN R. JAY, and Christian RUMELHARD LE BRUN, Paul ABSTRACT Addressing the need for quantitative design rales in C.A.D. of microwave GaAs i.c.s, we describe the evaluation of microwave coupling and impedance for various systems of conductors on GaAs substrates. In particular, the coupling between t

NONSYMMETRICAL THREE-LINE MICROSTRIP COUPLERS L. Gruner* ABSTRACT The Green's function matrix facilitates the study of multiconductor transmission lines, including nonsymmetrical three-line micros trip couplers, since the effect of terminating impedances upon the input immittances as well as voltage and current ratios can be incorporated. Hence scattering parameters can be computed in an effi

NOVEL WIDE BAND MICROSTRIP BALUN* Roger JACQUES, Didier MEIGNANT ABSTRACT This paper presents a novel wide band microstrip BALUN, composed of two parts. The first one is a compensated Wilkinson power divider which provides a good power separation between the two output ports. The second is a passive phase shifter composed of two filters consisting of ) dB 90° hybrid couplers, the coupled an

SMALL-SIZED DIODE PHASE SHIFTER Fumio Takeda, Makoto Matsunaga ABSTRACT The design method and experimental results of the small-sized stripline hybrid coupler phase shifter are presented. In order to obtain smallsized diode phase shifter, coupled lines are used for the phase shift increment, and moreover to obtain broadband phase-frequency characteristics, it is clarified that the ratio of

NEW LOW-LOSS MILLIMETRE-WAVE HYBRID MICROSTRIP ANTENNA ARRAY A Henderson, E England and J R James* ABSTRACT A new hybrid configuration which combines a dielectric insular guide feeder with printed micros trip radiators is described. The insular guide is operated in a higher mode to enable efficient transfer of power to the micros trip radiating elements which lie on the substrate region of th

STUDY OF A MIC - PHASED ARRAY SOLID STATE SEARCH RADAR ANTENNA FOR MAN - TRANSPORTABLE F.Rispoli 0 ,L. Vegni 00 ABSTRACT - This work describes a possible approach towards the design of a particular class of phased array such as MIC solid state antenna array for search radars. The main characteristics of such an antenna are brought out in accordance with a general theory of open - ended wavegui

MICROSTRIP LINEAR ARRAY FOR POLARISATION-AGILE ANTENNA APPLICATIONS P.S. Hall. ABSTRACT A new configuration of the rampart line microstrip array is described that allows arbitrary polarisation to be obtained from the same basic geometry. The line consists of a periodic arrangement of right angle bends in a microstrip line, each period containing six bends. A first order design method is