VECTOR PROCESSING CONCEPTS IN MICROWAVE CIRCUIT DESIGN V. Rizzoli* and M. Ferlito** ABSTRACT The paper exploited detail tematic provement shows that new program circuit example. architectures vector design. can be devised, ideas allowing in the hardware capabilities of modern processors to be effectively are discussed by application im- in microwave design Some basic and the theoretical

THE DESIGN AND ANALYSIS OF DAR-I~)ATT DIODES Sorin Voinigescu, Dan Dascalu+) ABSTRACT- The analysis and design of DAR(Double-Avalanche Region) IMPATT diodes are considered. The so called-asymmetrical DAR-IMPATT is seriously questionmarked due to its poor power and efficiency capabilities. The term' symmetrical , is given an extended meaning in the description of the symmetrical DAR-IMPATT stru



IMPROVED PERFORMANCE OF HIGH VOLTAGE, MICROWAVE POWER, STATIC INDUCTION TRANSISTORS R. Regan, * A. Cogan,t I. Bencuya, * P. Haugsjaa* S. Butler,* ABSTRACT The performance of static induction transistors (SITs), fabricated with 10.5-µm pitch (gate-togate spacing) has been reported previously.[1] This presentation will discuss the improvements in performance that are achieved when the pitch is fur

THE EFFECT OF PROFILE DESIGN, BIAS CONDITIONS AND LOAD IMPEDANCE ON INTERMODULATION DISTORTION IN C-BAND GaAs POWERFETs Paul M. White, Barteld Van Rees, and Michael F. Leonard ABSTRACT A comparison of the intermodulation distortion performance of FETs fabricated with flat, spike and 1/x3 type profiles showed that they differ most in their response to gate bias. The effect of load impedance is

AN AUTOMATIC HOMODYNE NETWORK ANALYSER WITH PHASE SHIFT BASEBAND DATA SAMPLING UWE ~RTNER and BURKHARD SCHIEK KEYING AND ABSTRACT A homodyne network analyser is presented which makes use of a chain up to three digital phase shifters with unknown but reproduciblephaseshift/ insertion loss changes which allows a direct computation of the transfer function of a device under test (DUT). The principl

TRANSMISSION MEASUREMENTS AT MICRO-WAVELENGTHS CORRECTION BY DEVICE UNDER TEST MODIFICATION Bernhard Neumeyer*, Thomas Hartmann* ABSTRACT WITH ERROR An existing Ka-band (26.5-40 GHz) impedance measurement setup, using an HP 8410 B Network-Analyzer via down-conversion as phase-gain indicator and a simple desk-top computer for automation and calculation, has been extended to a complete S-parameter

A REAL-TIME SWEPT-FREQUENCY SEVEN PORT REFLECTOMETER G.F. Luff, P.J. Probert and J.E. Carroll Abstract A real-time swept frequency reflectometer is described capable of repeatedly displaying a complete 256 point plot of complex reflection coefficient with frequency every 0.2 seconds to an accuracy of 1% and 1°. The microwave design problems occasioned by swept frequency working are descri

A SELF-CALIBRATION ANALYZERS TECHNIQUE FOR DUAL SIX-PORT NETWORK M. Malkomes, ABSTRACT R. Meyer A simple calibration technique for use in dual six-port automatic network analyzers is presented. The calibration of each six-port with four standards (sliding load, short, two offset shorts) is combined with a "thru" self-calibration technique, which determines the scattering characteristics of t

SOME ASPECTS OF TIME DOMAIN ANALYSIS USING NETWORK ANALYSER DATA H.C. Heyker * ABSTRACT The principles of time domain analysis (TDA) using network analyser data and a fast Fourier transform (FFT) algorithm will be described. Two methods of simulating a time domain step response, which can be used in a TDA system, will be compared. Examples of the transformation of simulated and measured frequ