SUPERCOMPUTER-AIDED GENERALIZED MIXER ANALYSIS AND OPTIMIZATION Vittorio RIZZOLI (1), Claudio CECCHETTI (2) and Andrea NERI (2) ABSTRACT The high by suitable ly beyond excitation application paper, and computational power of modern supercomputers program architectures to solve CAD problems of conventional of possible with scalar systems. treatment nonlinear circuits under can be exploi

A FULL LARGE SIGNAL ANALYSIS OF ACfIVE MICROWAVE MIXERS J. Dreifuss, A. Madjar,IA. Bar-Lev2 ABSTRACT A new approach is used for the analysis of active microwave mixers which combine mixing and amplification, e.g. mixers based on single and dual-gate FETs (DGFETs). The normally used assumption that the LO signal alone is large while all the other signals present can be considered small is no long

A GaAs FET OSCILLATOR Heinz J. Siweris+, NOISE MODEL WITH A PERIODICALLY Schiek++ DRIVEN NOISE SOURCE Burkhard ABSTRACT Measurements and numerical simulations of the phase noise of a GaAs FET oscillator are described. It is shown that simulations with a conventional noise model lead to unsatisfactory agreement with the experimental results. A significantly improved accuracy is obtained with an

NEW SYNTHESIS APPLICATIONS E. Vollmer ABSTRACT METHOD OF TAPERED WIRE ANTENNAS FOR BROADBAND and J.H. Hinken* A broadband tapered V-antenna is designed by a new synthesis method for the geometry of the antenna. Because of its application to a broadband spectrometer, over a bandwidth of at least 20 : 1 the gain of the antenna should be nearly constant and the VSWR should be low. The characteri

A RADIATION BASED MODEL RECTANGULAR MICROSTRIP FOR THE ANTENNAS MUTUAL COUPLING BETWEEN Dr Noel M. Martin* ABSTRACT The results of a theoretical and experimental investigation into the mutual coupling effects between neighbouring rectangular microstrip patch antennas are presented. Proposed here is a novel model for the mutual coupling that is based on the power transfer that occurs when

THEORY AND EXPERIMENT ON THE EQUILATERAL TRIANGULAR PATCH ANTENNA K. M. Luk * , K. F. Lee, # and J. S. Dahele + ABSTRACT Although the equilateral triangular patch antenna had been analyzed by means of the cavity model without feed source and by means of a geometric optics model, there were important omissions in the previous theories. In this paper, we present the results of a conprehensiv

HIGH GAIN MODULAR MICROSTRIP ANTENNAS E. Levine, G. Malamud, D. Treves * ABSTRACT a modular approach for the design of microstrip arrays antennas. A theoretical study of the gain limitation in single-layer microstrip antennas is compared to experimental results in a set of 16,64,256 and 1024 element arrays. This work extends to high gain (35 dB) printed 

SELF IMPEDANCE AND RADIATION COUPLED PATTERNS MICROSTRIP OF THE ELECTROMAGNETICALLY DIPOLE (*) Ph. LEPELTIER, J.M. G. PITON FLOC'H, (**) J. CITERNE ABSTRACT An integral equation formulation for the analysis of the electromagnetically coupled microstrip dipole, is briefly described. Typical results for the resonant frequency, the self-impedance and the radiation patterns are compared to

INPUT IMPEDANCE AND MUTUAL COUPLING OF RECTANGULAR MICROSTRIP ANTENNAS WITH A DIELECTRIC COVER V. Hansen ABSTRACT with gral and M. Patzold* PATCH The input impedance and mutual coupling of rectangular patch a lossy or lossfree dielectric cover is calculated by solving equation for the antenna currents in the spectral domain. antennas an inte- 

MODULAR DESIGN APPROACH FOR A 2-8 GHz GaAs MMIC FEEDBACK AMPLIFIER J. M. Moniz, * ABSTRACT A. D. Barlas *, R. B. G~ld * A two-stage GaAs MMIC feedback amplifier has been developed with nominal 10 dB gain, 2:1 VSWR, and 6 dB noise figure over the 2-8 GHz band. A modular design approach enabled RF wafer probing of the entire 1.25 X 1.50 mm chip, its bias, matching, and feedback networks, as w