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MICROWAVE AMPLIFIER [5 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2012-09-25

English

Subject field(s)
  • Vacuum Tubes (Electronics)
  • Radar, Radio Guidance and Goniometry
DEF

An evacuated electron-beam tube in which an initial velocity modulation imparted to electrons in the beam results subsequently in density modulation of the beam.

OBS

Used as an amplifier in the microwave region or as an oscillator.

OBS

klystron: term officially approved by the Electronics and Telecommunications Terminology Committee.

French

Domaine(s)
  • Tubes et lampes (Électronique)
  • Radar, radioguidage et radiogoniométrie
DEF

Tube électronique qui produit des bouffées d'électrons par modulation de vitesse.

OBS

Le klystron est utilisé comme amplificateur dans le domaine des ondes hertziennes, notamment dans les radars.

OBS

klystron : terme uniformisé par le Comité d'uniformisation des termes de l'électronique et des télécommunications (CUTEL).

Spanish

Campo(s) temático(s)
  • Tubos de vacío (Electrónica)
  • Guía radárica, radioguía y radiogoniometría
DEF

Tubo electrónico generador de ondas ultracortas.

CONT

El clistrón se funda en la modulación de la velocidad de los electrones emitidos por un cátodo y repelidos por un ánodo de carga negativa.

OBS

klistrón: adaptación gráfica propuesta para la voz inglesa "klystron". El plural es klistrones.

Save record 1

Record 2 2011-12-14

English

Subject field(s)
  • Astrochemistry and Cosmochemistry
  • Electromagnetic Radiation
DEF

A radiation [that] is considered [to be] the remnant of the Big Bang, which cooled down to a temperature of 3 K (-270°C).

CONT

In 1965, Arno Penzias and Robert Wilson announced the discovery of microwave radiation which uniformly filled the sky and had a blackbody temperature of about 3. 5 K. The pair had been testing a new radio amplifier that was supposed to be exceptionally quiet.... After many attempts to account for all extraneous sources of radio noise, they came to the conclusion that there was a general background of radiation at the radio frequency they were using. After discussions with a group led by Robert Dicke at nearby Princeton University it became clear that they had in fact detected remnant radiation from the origin of the universe.

French

Domaine(s)
  • Astrochimie et cosmochimie
  • Rayonnements électromagnétiques
CONT

Vieux de douze milliards d'années puisque s'étant propagé pendant ce laps de temps mais aussi étonnamment jeune puisque témoin de phases fort précoces de l'histoire du monde, ce rayonnement fossile diffus constitue l'une des preuves éclatantes de la justesse de l'idée connue sous le nom de «big bang» selon laquelle notre monde est né dans un état de compression extrême pour entamer une prodigieuse expansion. [...] Pour avoir découvert ce rayonnement fossile en 1963, [...] Penzias et Wilson reçurent le prix Nobel.

PHR

Rayonnement cosmique fossile.

Spanish

Save record 2

Record 3 2003-07-21

English

Subject field(s)
  • Microwave Technology (Telecommunications)
  • Satellite Telecommunications
CONT

Power amplifier linearization is employed in a variety of microwave communication systems. It is an effective method that results in significantly higher output power operation for the power amplifier. Without Linearization, system constraints, such as intermodulation noise, spectrum spreading and BER performance, make it necessary to operate the power amplifier in a backed off mode.

French

Domaine(s)
  • Micro-ondes (Télécommunications)
  • Télécommunications par satellite

Spanish

Save record 3

Record 4 1992-02-03

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Amplifiers (Electronics)
DEF

A traveling-wave tube and its associated high-voltage power conditioner. Used as the final power amplifier and sometimes the preceding driver amplifier, in earth station, microwave relay or communication satellite transmitters.(LAURISTON, Andy, et LE NEAL Jocelyne. Dictionnaire bilingue des télécommunications, vol. 2, Équipements de transmission, Transmission Equipment, Montréal, Téléglobe Canada, 1985, p. 183)

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Amplificateurs (Électronique)
DEF

Tube à onde progressive et son alimentation à très haute tension. Utilisé comme amplificateur de puissance et parfois comme préamplificateur pilote dans l'étage de sortie d'un émetteur de satellite de télécommunications, de station terrienne ou de relais hertzien. (LAURISTON, Andy, et LE NEAL Jocelyne. Dictionnaire bilingue des télécommunications, vol. 2, Équipements de transmission, Transmission Equipment, Montréal, Téléglobe Canada, 1985, p. 183)

Spanish

Save record 4

Record 5 1976-06-19

English

Subject field(s)
  • Telecommunications
OBS

"without an intermediary line amplifier for distances up to 3 km. or via microwave radio-electric transmission" MAS. 69. 477. e

French

Domaine(s)
  • Télécommunications
OBS

"sans amplificateur de ligne intermédiaire jusqu'à 3 km. ou par départ hertzien" ibid. radar surf ace 106jp.06.06. 74

Spanish

Save record 5

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