Knowledge Centre
Find a document written by the best international scientists in our secure database.
24776 documents found.
SOLID STATE AMPLIFIERS FOR 3.6 - 4.2 GHz RADIO RELAY
SOLID STATE AMPLIFIERS FOR 3.6 - 4.2 GHz RADIO RELAY Timothy E. Boles, John Walsh, Anthony E. Hilling ABSTRACT & INTORDUCTION The design of microwave amplifiers by systems manufacturers is limited in gain, power output, and especially bandwidth by the parasitic reactances of the transistor packages used in the fabrication of discrete devices. These limitations become more critical as the f
AVALANCHE DIODE AMPLIFIERS FOR MICROWAVE RADIO EQUIPMENT
AVALANCHE DIODE AMPLIFIERS FOR MICROWAVE RADIO EQUIPMENT S. F. paik*, G. E. St. John*, and C. J. R. Pallemaertst ABSTRACT Avalanche diode amplifiers (ADAs) with power outputs of 0.5 - 2.0 Watts have been developed for communication systems. Circuit design technique for these ADAs and their performance characteristics in high-capacity microwave communication systems are described. In addit
A 12 GHZ FIELD EFFECT TRANSISTOR AMPLIFIER FOR COMMUNICATIONS SATELLITE APPLICATIONS
A 12 GHZ FIELD APPLICATIONS EFFECT TRANSISTOR AMPLIFIER FOR COMMUNICATIONS SATELLITE D.S.James, * R.J.P.Douvi11e, * R.W.Breithaupt, * A.L.VanKoughnett * ABSTRACT The development of a 12 GHz Field-Effect Transistor (FET) Amplifier for use in a communications technology satellite is described. The principal features of Fairchild FMT 941 and P1essey GAT 3 FETs are compared and the perfor
GALLIUM ARSENIDE FIELD EFFECT TRANSISTORS - THEIR PERFORMANCE AND APPLICATION UP TO X-BAND FREQUENCIES
GALLIUM ARSENIDE FIEID EFFECT TRANSISTORS - THEIR PERFORMANCE A1ID APPLICATION UP TO X-BAND FREQUENCIES H.E.G. LUXTON ABSTRACT The microwave performance of GaAs FET's is reviewed and examples of their application in systems operating up to X-band frequencies discussed. Examples of amplifiers (one giving 42 dB gain at 11.2 GHz) and oscillators operating at frequencies hitherto unattain
CHARACTERISTICS OF DUAL GATE GaAs MESFETs
THE USE OF HARMONICS FROM A MILLIMETRE WAVE IMPATT OSCILLATOR FOR SPECTROSCOPY AT FREQUENCIES 170-190 GHz
TWO-THERMOMETER TECHNIQUE FOR CALORIMETER-TYPE WAVEGUIDE POWER METERS
TWO-THERMOMETER TECHNIQUE FOR CALORIMETER-TYPE WAVEGUIDE POWER METERS A.E. Fantom * and I. Yokoshima t ABSTRACT This paper presents in calorimeter-type principle a method of reducing the r.f.-d.c. waveguide power meters by the use substitution of two error thermometers. on this A calorimeter for the frequency range is described. 60 - 90 GHz based
ON AUTOMATIC MEASUREMENT OF MICROWAVE NOISE FIGURE
ON AUTOMATIC ~mASUREMENT Krzysztof ABSTRACT Grabowski, OF MICROWAVE NOISE FIGURE ~~adys~aw Adamski, Jerzy D~browski In conventional microwave automatic measurements of the amplifier noise figure the measurement results are distorted by an error which is due to the noise of the receiver itself which is connected in cascade with the amplifier under test. This error depends on the receiver noise
NON-DESTRUCTIVE MEASUREMENT OF COMPLEX PERMITTIVITY FOR DIELECTRIC SLABS
NON-DESTRUCTIVE MEASUREMENT OF COMPLEX PERMITTIVITY FOR DIELECTRIC SLABS Marc C. Decreton and V. Andriamiharisoa ABSTRACT A method has been developed for a precise non-destructive measurement of the dielectric constant and losses of slab-like samples, such as micros trip substrates for instance. The test setup basically consists of an open-ended rectangular waveguide whose flange is place
NEw MICROWAVE SYSTEM TO DETERMINE THE COMPLEX PERMITTIVITY OF SMALL DIELECTRIC AND SEMICONDUCTING SAMPLES
NEIl MICROW'AVE SYSTE.'M TO DETEHMINE OF SMALL DIELECTRIC THE CO:t-1PLEX PER}1ITTIVITY SAMPLES AND SEJ.fICONDUCTING J. l-1usil x, F. ~;icCkx, A. BUrger +, J. Kar lovsky + Abstraot: This dielectric ler than permittivity measure electric are rowaves, system of the tained by paper describes the of very for materials. way than the slab new small microwave transverse This the the samples material of