MICROWAVES - THE NEW HORIZONS OF RADIO ASTRONOMY R. Wielebinski* ABSTRACT The development of radio astronomy is closely linked with progress in microwaves. Some of the first applications of new microwave devices were for radio observations of the universe. Radio astronomy which started at metre wavelengths has first moved to centimetre waves, is presently operating at millimetres and is now mo

FREE ELECI'RON LASERS: NEW SOURCES OF MILLIMETER AND SUBMILLIMETER WAVES. Henri J. Doucet and Jean Max Buzzi ABSTRACT Free electron lasers, combining the stimulation of radiation by an electron beam in an undulator and a Doppler upshifting of the stimulated radiation, presently provide efficient and tunable generators of millimeter and submillimeter waves. The interaction between the waves

SYSTEM APPLICATIONS R. Esposito * OF MICROWAVES TO RADARS: MODERN TRENDS. ABSTRACT. The impact of the microwave technology on the performance of modern radar systems is outlined, together with the resulting design implications. The most advanced characteristics of the main microwave components are pointed out and proper use of combined technologies in complex subsystems as electronically scanned

OPTICAL BEAM CONTROL OF MILLIMETER WAVB PHASED ARRAY ANTENNAS FOR COMMUNICATIONS A. Daryoush+, P. Herczfeld+, V. Contarino+, A. Rosen++, Z. Turski* and P. Wahi* ABSTRACT Large aperture phased array antennas are designed with fiber-optic distribution networks to provide phase and frequency reference signals, control signals for beam steering and shaping, and data/frequency hopping signals to MMIC

REFLECTION MONITOR FOR AN OVERSIZED CIRCULAR WAVEGUIDE M. Kitlinski*. G. Hochschild**. W. Wiesbeck*** ABSTRACT A new set-up to determine the power relation between transmitted and reflected waves propagating in a highly oversized cylindrical waveguide is presented. This system is up to now the only known possibility of a high directivity measurement in a highly oversized waveguide, where a

COMPUTER CAPABILITY CONTROLLED SYSTEM OF OPEN RESONATORS WAVE HAVING A FAST MEASUREMENT AT MICROWAVE AND MILLIMETRE FREQUENCIES L.J. Auchter10nie *, R. Hart,* D. Smith + ABSTRACT A system of three open resonators which is controlled by a microprocessor is described. This facility allows simultaneous measurements of scattering phenomena to be made at chosen frequencies within the ra

ON-WAFER FREQUENCY- AND TIME-DOMAIN HETEROJUNCTION G.G. Mekonnen BIPOLAR and H.G. TRANSISTORS Bach CHARACTERIZATION AND FETs OF InGaAs(P)/InP ABSTRACT A probe is designed to achieve frequencyand time-domain measurements on semiconductor devices, e.g. transistors direct on the wafer. Small signal frequency-domain information (s-parameters) were evaluated from pulse responses using Fourier transf

FuLL NOISE APPLICATION CHARACTERIZATION OF TO GaAlAs/GaAs TEGFET. MICROMAVE DEVICES. L. Chusseau, B. Carnez, M. Le Brun and C. Rumelhard (*) ABSTRACT A new method for the full noise characterization of microwave devices is proposed. It takes into account various kinds of measurement uncertainties, and is able to process results from an automatic noise measurement set up. The full noise

A NEW TYPE OF E-PLANE UPCONVERTER FOR SPACE APPLICATIONS Alexandra P. Delamer* ABSTRACT Published work on MIC mixers has dealt with downconverter applications (1-3). This paper describes a low conversion loss upconverter which has been designed to operate over a wide bandwidth with a high level of intermodulation suppression in a space environment. The design and measured performance of an

LOW NOISE, HIGH STABILITY, BOARD SATELLITE EQUIPMENT. X-BAND FREQUENCY GENERATOR FOR ON A.MILANO <*) C.PIAZZANO (**) 1 ABSTRACT At present. and still more in the future, the on board satellite equipments need frequency generators working at high frequencies. It's possible, of course. to use the actual C Band frequency generators,followed by a proper chain of multipliers. However this choi