A NEW TYPE OF MICROWAVE POWER LIMITER WITHOUT SPIKE LEAKAGE B. BOITTIAUX jIE',J. M. JENDRZEJCZAK jIE, G,. FORTERRE jlEjIE, J. MARCOUX jIEjIE ABSTRACT A new type of microwave power limiter without spike leakage is studied based on a very fast bulk effect in semiconductors. A numerical study of the structure is presented and expected performances of two common semiconductors are shown. Theor



WIDE BAND FREQUENCY DOUBLER D. DORSI ~ ABSTRACT Conventional frequency multipliers using step-recovery-diodes operate on narrow or moderate instantaneous bands. However, multipliers operating on bandwiths of 10 to 15% of the nominal frequency are needed in local oscillator generators for frequency agile up and down converter applications. This paper describes a microstrip frequency doubler,

PERFORMANCE AND CIRCUIT CHARASTERISTICS OF CATTS J. R. Eshbach, S. P. Yu, W. R. Cady and N. T. Lavoo ABSTRACT New results in the 3-5 GHz region, obtained on CATT cells designed for improved efficiency as microwave power amplifiers, are reported. At 3.0 GHz collector efficiencies of 39% have been measured with 12 dB gain and 1.4 watts peak output power per cell. At 5.0 GHz the results are: 2

ADVANCES PROGRESS IN THE FIELD OF MICROWAVE WAVE RADIOMETRY GENERATED BY THE TECHNOLOGICAL IN THE MILLIMETER + REGION K. Gruner) Abstract Passive objects visible mapping of the environment by detection of natural radiation of is possible in the microwave region in the same way as for the and infrared part of the electromagnetic spectrum. Because of the minor weather sensitivity and the s

MilliMETER WAVE THERMOGRAPH AS SUBCUTANEOUS INDICATOR OF JOINT INFLAMMATION J. Edrich* and C.J. Smyth+ ABSTRACT Noninvasive scanning imaging technique of inflammations is described; it of human uses the joints mm wave 1 using a new remote radiation emitted by the human body. This method overcomes the depth imitations of convention- al infrared thermographs and can measure

TERATOGENIC POWER OF SHF FIELDS. TENEBRIO MOLITOR COLEOPTERON. Guglielmo d'Ambrosio(+}, Vincenzo FURTHER EXPERIMENTS ON La Manna(+}. ABSTRACT Teratogenic effects of microwaves were experimentally investigated. Larvae and six days old pupae revealed to be less sensitive than one day old ones. Energy dosage (reciprocity) law appeared to fail at short time exposures. Experiments, carried out at

A MODIFIED RADIOMETER FOR TEMPERATURE AND MICROWAVE PROPERTIES SUBSTANCES MEASUREMENTS OF BIOLOGICAL A. MAMOUNI ., F. BlIOT ., Y. lEROY. .. and Y. MOSCHETTO ABSTRACT The use of radiometers for biomedical applications needs a coherent understanding of thermal signals emitted by the tissues. In this paper, we show first, that some precautions have to be taken when measuring a temperature by

DESIGN AND APPLICATION OF SPECIAL MICROWAVE INTERFEROMETERS FOR NON-INVASIVE STUDIES OF BIOLOGICAL EFFECTS. Donald W. Griffin ABSTRACT Special microwave interferometers have been designed to make non-contact measurements of the movements associated with various physiological functions such as respiration, pulse, muscle action, reflexes, involuntary tremors, etc. For each interferometer the fac

A MICROWAVE RADIOMETRIC OF LIVING TISSUE METHOD FOR THE STUDY OF THE SEMICONDUCTOR PROPERTIES J. Bigu-del-Blanco *, A. Schneiter ** and J. C. Beal ** ABSTRACT A MW radiometric method for the study of the semiconductor properties of tissue is proposed. This method makes use of the non-linear properties of tissue in conjunction with its radiative properties as described by blackbody theory.