A MILLIMETRE-WAVE SELF-OSCILLATING OSCILLATOR MIXER USING A GaAs FET HARMONIC-MODE D.H.Evans ABSTRACT A Ka-band self-oscillating mixer is described. The harmonic-mode oscillator which is constructed in microstrip produces 4 mW and as a mixer has a minimum detectable signal sensitivity of -121.6 dBm/Hz at a Doppler frequency of 4 kHz. It is potentially a cheap sensor for motion and proximity det

WIDE-BAND, ULTRA lOW NOISE MM-WAVE MIXERS WITH A SINGLE TUNING ELEMENT A.V. Raisanenl*, D.G. Cretel**, P.l. Richardsl and F. L. lloyd2 ABSTRACT Several SIS quasiparticle mixers have been designed frequency range from 80 to 115 GHz. The sliding adjustable RF-tuning element. The RF-filter reactance RF-matching element. A mixer which uses a single junction in a 1/4-height waveguide mount has a GM

MILLIMETER BALANCED C.P. Hu* WAVE FREQUENCY [1] MULTIPLIERS EMPLOYING SEMICONDUCTOR DIODES IN A CONFIGURATION ABSTRACT The application of semiconductor diodes in microwave/millimeter wave frequency multipliers is well known. A new technique, employing semiconductor diodes in a balanced circuit configuration, has demonstrated significant performance advantaies in millimeter wave doubler an

A MILLIMETER WAVE SCHOTTKY-VARACTOR FREQUENCY RANGE Timo J. Tolmunen*, Antti V. Raisanen* DOUBLER WITH A WIDE TUNABLE and Arto O. Lehto* ABSTRACT The efficiency of mm-wave doublers with a wide tunable frequency range was studied. The efficiency depends on the varactor parameters and the embedding impedances seen by the diode at fundamental and harmonic frequencies. Mm-wave doublers were simula

SYSTEM PERFORMANCE DEGRADATION DUE TO SCINTILLATIONS ON SATELLITE LINKS (*) U. Merlo, J. Polikronakis (**) , S. Piazzolla (***) ABSTRACT Computation of Bit Error Ratio due to the attenuating part of scintillations is performed for the case of binary coherent phase shift keying. The effect of finite antenna area is also discussed and evaluated through a series of examples of scintillations on s

PROPAGATION OF HIGH FREQUENCY WAVES IN TUNNEL * S. Kyheng, P. Degauque * and J. Baudet * ABSTRACT Theoretical frequency waves in 900 MHz to 10 GHz. not only the mean variations of the must be taken into transmission. and experimental approaches of the propagation of high tunnel are described. The frequency range extends from In the experimental part, it is interesting to know, value of the atten

MILLIMETRE - WAVELENGTH CELLULAR RADIO: PROPAGATION MEASUREMENTS AT 55GHz H J THOMAS* G L SIQUEIRA* R S COLE* ABSTRAcr Initial results obtained from a study of nultipath propagation at 55GHz in a heavily built up urban mobile radio environment are presented. Statistical analysis of the results show a near Rayleigh distribution when the mobile receiver is distant from the transmitter, with

PROPAGATION MEASUREMENTS FOR 900 MHZ MOBILE DIGITAL L. Szabo, R. W6lfle ABSTRACT COMMUNICATION SYSTEM Impulse response data for different urban and suburban propagation media are recorded using correlating techniques in typical european environment. For the first time these data give a characterization of the time-varying nature of the multipath environments. The experimental investigations pres



LARGE-SIGNAL TIME DOMAIN MODELLING OF NOISE IN THE DESIGN OF MESFET OSCILLATORS. BUNTING, ABSTRACT J.M; HOWES, M.J; RICHARDSON, J.R. An analysis technique for MESFET microwave oscillators based on a largesignal equivalent circuit model is presented. The operation of the circuit may be simulated, generating long periods of time-domain data that may be used to accurately predict the oscillator's f