A MICROWAVE ATTENUATION MOISTURE CONTROLLER Jerzy Kalinski COMPARATOR AS AN INDUSTRIAL ON-LINE Abstract: The circuit of a moisture content - attenuation voltage converter in the form of a microwave attenuation comparator is presented in the paper.Time-domain discrimination of the measuring and reference signals has been applied. Independence between the measurements results and the phase relat

MEASUREMENT OF CURRENT DEVICES. IN EHV AND UHV TRANSMISSION LINES USING !IG-TUNED * M.N.Rzewuski,S.S.Stuchly +,M.Z.Tarnawecky +. ABSTRACT. New systems for current measurement in HV DC and HV AC transmission are described. The systems utilize the YIG-tuned devices placed in close vicinity of the HV line conductor as a magnetic field sensor.The output signal of the system is proportional to

MICROWAVE SCANNING MICROSCOPY FOR NON-DESTRUCTIVE TESTING A. Husain*and E.A. Ash* ABSTRACT A microwave scanning microscope capable of detecting and locating defects in a metal surface is described. Using a technique to obtain superresolution, previously described, the instrument has proved capable of resolving gratings with periods of l/2OO, and of detecting fatigue cracks less than 2µ in width.

MULTIFREQUENT MICROWAVE HOLOGRAPHY AT CLOSE RANGE Rolf Karg ABSTRACT By recording and reconstructing several microwave holograms of the same object at different frequencies, and superposition of the complex amplitude of the reconstruced images in an appropriate manner, the resolving power can considerably be improved. Experiments in the 8-12 GHz region are presented with simple objects. The re

MICROWAVE DISTANCE METER WITH ~ 2.5 MM RESOLUTION R. Jacobson, B. Schiek, W. Schilz* A range resolution of ~ 2.5 mm has been obtained with a FMCW radar and a sophisticated signal processing. The system operates at X-band with 1.5 GHz frequency sweep. It makes use of the fact, that the total phase length dø of the IF waveform produced by superposition of the transmitted and reflected FMCW si

A HIGH STABILITY MICROWAVE SYNTHESIZER FOR SPACE APPLICATIONS M. RONSISV ALLE~~ ABSTRACT Two phase locked transistor and Gunn diode oscillators have been developed at S and X band respectively as building blocks of a microwave synthesizer for on-board space applications. Each VCO is locked to a single reference source by means of a wideband control module, that has been made in hybrid technology

MICROWAVE POWER UP-CONVERTERS FOR ANGLE MODULATED USING PHASE-LOCKED MICROWAVE OSCILLATORS K.-E. Schertler SIGNAL3 ABSTRACT A new technique of microwave power generation using the phase-locked loop principle is described. It combines the functions of a microwave up-converter and a microwave power amplifier and is therefore particularly attractive for heterodyne-type radio relay transmitters. Pow

TEMPERATURE STABLE DIELECTRIC MICROWAVE RESONATORS FOR HIGH POWER APPLI- CATIONS 1) 1) , H. Steyskal Sr. , L.D. Wernlund Ph. Charas 2) ABSTRACT Temperature stabilisation was obtained by combining two dielectrics with opposite temperature coefficients of dielectric permittivity to a composite resonator. Single crystals of LiNb03 were used as the part with positive coefficient, while the ot

HIGH-PERFORMANCE, GLASS STABILIZED, MICROWAVE FREQUENCY SOURCES Jing-Jong Pan and Paul Sierak ABSTRACT An ultrastable, low-noise, low-cost, fixed-frequency, S-band transistor frequency source controlled by a metallized glass cavity has been computer optimized. Frequency and temperature stabilities of 0.9 x 10-9 parts/hour and 1.8 x 10-7 parts/ºC, respectively, have been achieved. A C-band, tu

A PHENOMENOLOGICAL MODEL FOR A. M. AND F. M. NOISE OF GUNN TYPE MICROWAVE OSCILLATORS B. V. RAO* and N. R. SHETTY ABSTRACT w "... Monte Carlo techniques have been applied for the first time in the calculation of hot noise in multivalleyed GaAs taking various possible scattering mechanisms into account. A. M. noise (DSB)to carrier ratio and r. m. s. frequency deviation as well as F. M. noise (DS