SYSTEM APPLICATION OF CM WAVE IMPATr DIODE POWER COMBINERS Hans A. Maurer* ABSTRACT The system application of a pulse-modulated transmitter chain using microwave power combiner with 8 to 16 IMPATT diodes is described. Modulation and thermal considerations are discussed and some test results presented. a 

FREQUENCY STABLE M.I.C. S-BAND AND C-BAND PULSED TRAPATT OSCILLATORS Colin D Corbey, Barrie H Newton, John G Summers ABSTRACT Microstrip pulsed TRAPATT oscillators using devices designed for S-band have been operated in the fundamental and second harmonic extraction modes to give efficient high power operation at S and C-band frequencies. Conversion efficiencies of greater than 30% in th

COMPLEX INDEX OF REFRACTION MEASUREMENTS WITH A SWEEP GENERATOR INTERFEROMETER V.V. Meriakri, G.A. Kraftmaher and E.F. Ushatkin ABSTRACT A simple and precise method of complex refractive index measurements in the submillimeter range has been elaborated. As a source of radiation in the quasioptical interferometer we use a swept carcinotron. The method combines the advantages of usual Fourier trans

OPTIMAL DESIGN CRITERIA FOR MILLIMETER-WAVE SPECTROMETERS B. Leskovar. D. B. Hopkins. W. F. Kolbe ABSTRACT - Optimal design criteria for millimeter-wave cavity-type spec- trometers used in the measurement of molecular spectra have been derived. Using an optimally designed spectrometer the technique of molecular spectroscopy offers a highly sensitive and specific experimental research meth

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