115 GHz LOW NOISE CRYOGENIC RECEIVER FOR RADIOASTRONOMY G. BEAUDIN - B. LAZAREFFx - J.R. MAHIEU+ ABSTRACT This paper describes a cryogenic front-end designed for radioastronomical observations around 115 GHz. The system includes an image-rejection filter, a single ended microstrip mixer, and a 5 GHz IF consisting of a paramp followed by a FET amplifier, all cooled at 200K and 77°K. The mix

80 GHZ RADIOMETER CALIBRATION SYSTEM Mikko Toriseva ABSTRACT A calibration system for an 80 GHz radiometer has been designed and constructed. During observations, calibration is obtained from a noise valve, the noise of which is fed to the radiometer via a beam switch. The calibration signal is controlled by a mechanical waveguide switch. It has been confirmed by experiment that, at millimetr

THE ONSALA 20 M MILLIMETER WAVE RADIO TELESCOPE O.E.H. Rydbeck, B.Ronnang, and Richard d~Amato~* B.Hansson, J.Ellder, A.Hjalmarson, E.Kollberg~ ---- Abstract A 20 m millimeter wave telescope, enclosed in a 30 m metal space frame radome, has recently been completed and put into operation by Research Laboratory of Electronics. A number of novel features are incorporated in this new, Cass

A MULTIFREQUENCY RADIOMETER SYSTEM Niels Skou * ABSTRACT A radiometer system having four channels: 5 GHz, l7 GHz, 34 GHz, vertical polarization, and a 34 GHz sky horn, will be described. all The system which is designed for collecting glaciological and oceanographic data is intended for airborne use and imaging is achieved by means of a multifrequency conically scanning antenna. Implementat

A MODULAR SIDE LOOKING AIRBORNE RADAR TO FULFILL A MULTITUDE OF SURVEILLANCE MISSIONS Mr. Russell Vollmers* Mr. Guy V. Morris** ABSTRACT A side looking airborne radar is being modularly configured so that each user can procure only what is needed for his missions. The baseline system employs a 200 kw magnetron transmitter and an 8-foot antenna to provide a real aperture mode for ship detection and

DETECTION OF BURIED OBJECTS BY MICROWAVE MEANS P.J.B. Clarricoats, R. Kularajah, R.R. Lentz and G.T. Poulton ABSTRACT A system is described for the microwave means. It utilises and incorporates a forward-looking improvement in signal/clutter Experimental results have been buried plastic boxes and plastic configuration is discussed. detection of non-metallic buried objects by an FMCW radar o

MICROWAVE REMOTE SENSING TECHNIQUES, A SURVEY M. Vogel + Abstract The presentation will consider the motivations for the development of remote sensing techniques and systems for operation from aircraft and satellites and survey the various classes of passive and active microwave remote sensing instruments, microwave their remote sensing instruments, inherent capabilities, requirements for

GIGABIT Berthold ELECTRONICS G. Bosch ABSTRACT Intended as an introductory survey, the paper at first points out the pertinent applications of gigabit/s techniques. This is followed by a description of the general circuit design philosophy when dealing with gigabit information rates and of the main problems encountered. Finally, the present status is assessed in the realization of the fast switc

LOCAL OSCILLATOR FOR MICROWAVE RADIO LINK TRANSCEIVERS E.Cottatellucci, ABSTRACT M.Tosolini, G.Tosti * This local oscillator uses a RF transistor generator with a frequency stability of 1% and reduced FM noise. The requested frequency stability of +-10.10-6 is achieved by locking the R.F. generator to a quartz oscillator by means of two sampling mixers and a zero frequency discriminator. The

A 7GHz BAND GaAs FET AMPLIFIER FOR THE STRAIGHT-THROUGH-REPEATER Haruo Yokouchi, Akira Izumi, Yoshikazu Dooi and Kazuo Takahara ABSTRACT A 7GHz band GaAs FET amplifier for the straight-through-repeater has been developed. The amplifier has six single-ended stages, a 40dB linear gain, a 4 to 4.5dB noise figure and 17dBm saturated output power over a frequency range of 6.5 to 6.9GHz. Th