A TRANSFORMEDAUTOMATIC REFLECTOMETER FOR VECTORIAL MEASUREMENTS: APPLICATION TO K-BAND. M. GOLOUBKOFF, B. GIRAUD AND P. LEGAUD. ABSTRACT At frequencies above 18 GHz a measurement bench dedicated for appl icat ion Laboratory use-i s proposed to give i nformat ion on phase using a 5 port principle. A classical wave guide reflectometer (K and Ka frequency band) can be improved to give vectorial refl

COMPLEX IMPEDANCE USING MEASUREMENT UNSTABILIZED WITH A NETWORK ANALYSER BY DOWN- CONVERSION W-BAND-IMPATT-SOURCES Th. Hartmann; * W. Hetzner * ; J. Detlefsen * ABSTRACT Complex impedance measurements in the frequency range above 27 GHz can be realized by heterodyning the measured signals to the operating frequencies of existing microwave network analysers. The concept works well in Ka-

A FOUR-PORT AUTOMATIC NETWORK ANALYZER K.Brantervik* ABSTRACT A four-port range. automatic network analyzer has been built for the 8-12 GHz An essential feature of this analyzer [1] compared with the six-port systems [2-3] is that only one detector is used, and an electrically adjustable short circuit is added as a reference object. A computer program has been developed which is written in B

DESIGN AND PERFORMANCEOF MICROWAVE-PREDISTORTION NETWORKSUSING MIC-TECHNIQUE S.LENZ * ABSTRACT This paper deals with the problems on the design of microwave integrated predistortion networks. The discussion of amplifier nonlinearities is followed by a brief description of the predi stortion network. Design steps are gi ven concerning generation of nonl inear products and integrated coupling an

THE SLOTTED-WAVEGUIDE IN THE EMSLAND, W.D. Schuck, GERMANY COMMUNICATION SYSTEM OF THE MAGLEV TEST RANGE R. Rieger * ABSTRACT A high capacity communication link is described, which uses a slotted-waveguide as a transmission medium. The slotted~waveguideis a rectangular waveguide with a framed slot in its broadwall. The coupling structure, mounted to the moving Maglev vehicle, is plunging t

A NEW METHOD TO MINIMIZE Dr. M. Niemeyer, THE MULTIPATH B. Sommer+ EFFECTS OF DIGITAL MICROWAVE LOS- SYSTEMS, BASED ON WIDEBAND MEASUREMENTS AT 5 AND 15 GHz W. Schwarz, ABSTRACT Measurements have been range. The analysis of carried out the records on a 60 ~ path in the revealed two important 5 and 15 GHz results: First, the statistical consideration of the long term experiments yields to a p

A FAMILY OF 16 QAM RADIO SYSTEMS FOR TRANSMISSION OF 140 MBITjS H.-G. Gerst + ABSTRACT The philosophy of the mechanical and electrical design of the radio equipment covering the frequency ranges 3.9, 6.7, 11.2 GHz is presented and details of some important subunits are discussed. Furthermore, measurement results of bit error rate depending on noise, linearity and selective fading are given. 

MICROWAVE RADAR FOR MEASURING VIBRATIONS ON POWER TRANSMISSION LINES Martti Tiuri, Jari Hyyrylainen ABSTRACT A 16 GHz microwave radar for the measurement of aeolian vibrations on power transmission lines has been developed. It is an FM CW radar and can measure the vibrations at the frequency range 0...50 Hz with amplitudes over 20 ~m. A small corner reflector can be attached to the conducto

A METHOD FOR REDUCING TIME DRIFT Klaus Matkey and Hans-JUrgen IN MICROWAVE SAMPLING SYSTEMS Meckelburg *) ABSTRACT A new method to reduce time drift in microwave sampling systems is presented. The influence of noise is discussed, giving the remaining time uncertainty as a function of the signal-to-noise ratio. Finally an example illustrates how this method can be applied within an automatic mi

EVAI,UATION WITH AND IMPROVEMENT FIELD OF THE ACCURACY OF TEM TRANSMISSION CELLS INTERNAL MEASUREMENTS K. Jokela, L. Puranen * * ABSTRACT Two square TEM transmission cells with side heights 30 cm and 50 cm were designed for the calibration of RF-hazard monitors. The error due to reflections was reduced from ~10 % to ~2 % (input VSWR < 1.2) by lengthening straight sections and measuring th