LARGE SIGNAL DESIGN AND REALISATION OF A LOW NOISE X BI~D , GaAs FET OSCILLATOR J.F. SAUTEREAu* - J. GRAFFEUIL* J.C. GOURDON** - B. VIGOUROUX.+ - K. TANTRARONGROJ* - G. ABLART** - The output of a GaAs FET oscillator jitters mainly in phase 7 the origin of this jitter is the noise of the active device. Because GaAs FETs exhibit excess noise, an important consequence is that the oscilla

NEW VERY TORS. KHANNA HIGH Q MICROWAVE TRANSISTOR OSCILLATORS USING DIELECTRIC RESONA- A.P.S. ~ ; OBREGON J. ~~ ; GUILLON P. ~ ; GARAULT Y. ~ ABSTRACT Using the dielectric resonator as the matching as well as the frequency determining element, one port and two port Microwave Transistor oscillators having external quality factors much higher than the unloaded Q of the dielectric

DENSITY INDI?ENDELiJ'r MOISTURE ItTETERING IN FISH MEAL INDUSTRY M. Kent* andN. Neyer+ ABSTRACT Experiments on unground fish meal have been performed using a newly developed density independent moisture meter based upon a two-parameter measurement of a transmission horn applicator. It is considerably better for this material than any instrument based on single parameter measurement. For ve

Low Cost Ka-Band Mixers for Industrial Applications H. Meinel, H.G. Wippich, and G. Begemann Abstract: The development of more reliable and efficient solid-state sources up to the sub-mm-wave range has stimulated new interest in commercial applications. Three different approaches in this area can be distinguished, radar, radiometry and transmission measurement. Most of these applications w

APPLICATIONS OF MICROWAVES TO MEDICAL DIAGNOSTIC First approach of an active microwave imaging A. PRIOU, A. DEFICIS Abstract: to diagnostic moves, walls. imaging obtained more Only a few works such have been carried out to apply changes microwaves of respiratory science: as respiratory volume, diagnostic study moves, changes Among of respiratory the microwaves of the move we must

REMOTE TEMPERATURE SENSING IN ORGANIC TISSUE BY FERRIMAGNETIC FREQUENCY MEASUREMENTS F.K.Beckmann, H.Dotsch, P.Roschmann, and W.Schilz RESONANCE Abstract A remote temperature sensing method rature dependence of the ferrimagnetic spheres. The garnet material parameters is presented which resonance frequency are discussed for uses the in iron optimizing tempegarnet the of O.3GC measuring in the

A THINNED CYLINDRICAL ARRAY FOR FOCUSED MICROWAVE HYPERTHERMIA M. Melek and A.P. Anderson ABSTRACT A phased array configuration for microwave induced hyperthermia in cancer treatment is proposed with the objective of heating tumors deep within the body. The computer simulation consists of an elliptic cylinder representing the human thorax partially surrounded by a semi-circular array of r

MICROWAVE COMPUTERIZED TOMOGRAPHY H. Ermert, G. FUlle, D. Hiller ABSTRACT This paper presents a brief computerized tomography (CT): lication and limitations of tic purposes are discussed. imaging results demonstrate length. overview and a comparison of different kinds of transmission-CT and reflection-CT. The appCT in the microwave region for medical diagnosExperimental work is also reported

A HYBRID YIG ROD AND SPHERE FERRITE LIMITER Carter, Philip S.*; Craig, Robert A.**; Dixon, Samuel, Jr. and experimental results obtained on a low level, ABSTRAcr - Analytical subsidiary resonance, ferrite limiter which combines the advantages of both YIG rods and spheres located along the axis of a coupled dielectric resonator bandpass structure are described. The YIG material provid

HIGH POWER TUNABLE YIG FILTERS M R B Dunsmore and J Clarke* SUMMARY High power tunable microwave filters can be made with ferrimagnetic materials by using coupled spin wave - electromagnetic wave modes of propagation which are decoupled from the processes that limit the power handling capability of conventional YIG filters. These novel filters can be used for spectral containment of transmit