RADIO LINKS Horst 7 W MICROWAVETRANSISTOR AMPLIFIER FOR HIGH CAPACITY 4 GHZ Bernhard and Gerd OrtkraE ABSTRACT This paper describes the basic aspects for the design of wideband microwave transistor power amplifiers making use of advanced transistor technology. A novel measuring procedure for the accurate determination of the large signal impedances of microwave transistors is presented. For the

A NEW'PACKAGE FOR NEGATIVE RESISTANCE MICROWAVEDIODES T. Ishii, A. Kondoh, K. Shirahata A new microwave diode package containing additional inductance and capacitance besides case capacitance and lead inductance has been considered. Admittance and small signal characteristics of a silicon IMPATT diode cased in a new package are discussed. Using one of this sort of diodes, small signal power ga

NONLINEAR EFFECTS IN IMPATf DIODE AMPLIFIERS T. Berce li ABSTrACT. The nonlinear effects in Impatt diode amplifiers have been investigated bath theoretically and experimentally. Output power, group delay and AM-to-PM conversion characteristics show an increased unsymmetry with enhanced input level. The FM distortion is higher at band center than at the resonant frequency. Below the band center,

LARGE SIGNAL (a) BEHAVIOUR OF CATHODE NOTCH STABILIZED T.E. AMPLIFIER DEVICES Peter HARROP, John MAGARSHACK, Alain RABIER and Roberto SPITLANIK* ABSTRACT: An account of a computer model is presented which is designed to simulate the large signal behaviour of GaAs transferred electron amplifier diodes. Devices have been fabricated with a variety of doping profiles following the indica

A LOW NOISE INDIUM PHOSPHIDE REFlECTION AMPLIFIER R.M. Corlett, I. Griffith, J.J. Purcell ABSTRACT Noise reflection figures as low as 8 dB have been amplifiers operating over J -band measured (12-18 for GHz). Indium Phosphide A single-stage, low noise, reflection amplifier circuit has been designed to provide a gain of 8 dB at 15 GHz., with a 1 GHz bandwidth. The effect of the package i

POWER AMPLIFICATION OF MICROWAVE FM COMMUNICATIONS USING A PHASE-LOCKED VOLTAGE-TUNED OSCILLATOR SIGNALS M. E. Hines, R. S. Posner, A. A. Sweet* I. ABSTRACT AND INTRODUCTION This paper describes the use of a "single-stage" phase-lock-loop oscillator to provide high gain power amplification of FM communication signals as used in radio relay of multiplex telephone and television. The paper is larg

NOISE AND MODULATION PROPERTIES OF IMPATT-DIODE AMPLIFIERS J.J. Goedbloed and M.T. Vlaardingerbroek ABSTRACT. A new theory for the quantitative description of the noise and modulation properties of IMPATT-diode amplifiers has been developed, based on the method used in the large-signal theory of noise in IMPATT-diode oscillators by the present authors. The usefulness of the theory will be ill

SUM AND DIFFERENCE RADIATION PATTERNS OF A CORRUGATED CONICAL HORN BY MEANS OF LAGUERRE-GAUSSIAN D. BI':rl'ER, C. AUBRY FUNCTIONS * ABSTRACT This communication describes a new method to predict the HE from a narrow flare angle corrugated conical horn. A modal expansion of the aperture field in terms of orthogonal Laguerre-Gaussian functions is used. The radiated field is obtained from Kir

EARTH STATION ANTENNA USING REFLECTING BEAM-WAVEGUIDE FEED Shooji Sooma, Ikuro Sa to, Susumu Tamagawa Isao Mori and Kiyotsugu Ishii ABSTRACT The analysis and experimental evaluation of a reflecting beam-waveguide feed for an earth station antenna using two plane and two off-set paraboloidal reflectors is presented. Taking the mode matching theory in an optical resonator, the electromagneti

THE BODY CALIBRATION ENCLOSURE J. Keen OF A LARGE PARABOLOIDAL ANTENNA USING A CRYOGENIC BLACK- Nigel ABSTRACT The aperture efficiency of the 100-meter radiotelescope has been measured in the prime focus configuration at 5 GHz. Calibration was performed by inserting the feed-horn alternately in two specially designed black-body enclosures, the effective temperatures of which were provided