FUNDAMENTAL AND HIGHER ORDER MODES IN MICROSLOT LINES , J. CITERNE, S. TOUTAIN and L. RACZY * Abstract: "Sandwich" slot-line and original slot-line are investigated by an approximate waveguide treatment. The analytic solutions obtained yield the dispersion diagram of fundamental and higher order modes on these structures. Knowledge of the modes functions permits to derive, like-T.E.M. impeda

EQUA~IONS FOR MICROSTRIP CIRCUIT DESIGN Erik O. Hammerstad ABSTRACT A method for determining the accuracy of computed impedance and wavelength data for microstrip is proposed. It is shown that the standard equations of Wheeler and Schneider have rather large errors. Revised equations for microstrip impedance and wavelength are given both for analysis and synthesis with accuracy better than 1



THE OPTIMUM AREA FOR MILLIMETRE-WAVE IMPATT DIODES I S Groves and P W Huish ABSTRACT. By considering the loss of a practical millimetrewave oscillator circuit, the variation of oscillator power with diode area for a constant junction temperature rise is examined, the results being scaled from measurements on a known device. It is concluded that the diode area for optimum oscillator power is

PHYSICAL MECHANISMS IN HIGH EFFICIENCY GALLIUM ARSENIDE AVALANCHE DIODES P.A. Blakey*, B. Culshaw* and R.A. Giblin* ABSTRACT: Anomalously high efficiencies have been observed in GaAs avalanche diode structures - approaching twice that predicted for the ideal Read diode. The physical mechanisms which contribute to this observed efficiency enhancement, namely depletion layer width modulation an

THE EFFECT OF TRANSFERRED-ELECTRON GaAs IMPATT DIODES ~ , VELOCITY MODULATION IN HIGH-EFFICIENCY by J. PRIBETICH E. CONSTANT, ~ A. FARRAYRE ~~ and M. LEFEBVRE ~ ABSTRACT: The transferred-electron effect on high efficiency IMPATT avalanche diodes characterized by non punch-through structures is investigated. It is shown that the high (greater that 30%) output efficiencies, experimentally

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