traveling-wave tube

An electron tube in which a stream of electrons interacts continuously or repeatedly with a guided electromagnetic wave, moving substantially in synchronism with it and in such a way that there is a net transfer of energy from the stream to the wave. A TWT can be used to produce energy at ultrahigh and microwave frequencies by coupling some of the output back into input, or what is called a backward oscillator, because the feedback is applied opposite to the direction of the movement of electrons. This can produce about 20 to 100 mW of radio-frequency power at frequencies up to several gigahertz. The backward-wave arrangement can also be used for amplification, but the most common traveling-wave amplifier configuration is the parametric amplifier, which uses the forward-wave mode.
The helix slows down the propagation of electrons as they travel down the tube, the electrons will bunch, and reinforce the voltage in the helix, which creates amplification.

Aviation dictionary. 2014.

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  • Traveling-wave tube — A traveling wave tube (TWT) is an electronic device used to amplify radio frequency signals to high power, usually in an electronic assembly known as a traveling wave tube amplifier (TWTA).The bandwidth of a broadband TWT can be as high as three… …   Wikipedia

  • Traveling Wave Tube — Eine Wanderfeldröhre (englisch Travelling Wave Tube, Abkürzung TWT) ist eine Laufzeit Elektronenröhre zur linearen und rauscharmen Hochfrequenz Signalverstärkung für den Frequenzbereich 0,3 bis 50 GHz. Sie erreicht eine Verstärkung von 1000 bis 1 …   Deutsch Wikipedia

  • traveling-wave tube — noun : an electron tube used for the generation of microwave frequency radiation or for amplification at ultrahigh frequencies whose operation depends on the interaction of a beam of electrons with an electromagnetic wave * * * /trav euh ling… …   Useful english dictionary

  • traveling-wave tube — /trav euh ling wayv , trav ling /, Electronics. an electron tube used in microwave communications systems, having an electron beam directed coaxially through a wire helix to produce amplification. * * * …   Universalium

  • photocathode traveling-wave tube — fotokatodinė bėgančiosios bangos lempa statusas T sritis radioelektronika atitikmenys: angl. photocathode traveling wave tube; traveling wave phototube vok. Photo Laufwellenröhre, f; Photo Wanderfeldröhre, f; Wanderfeldröhre, f rus. фотокатодная… …   Radioelektronikos terminų žodynas

  • transverse beam traveling-wave tube — skersapluoštė bėgančiosios bangos lempa statusas T sritis radioelektronika atitikmenys: angl. transverse beam traveling wave tube vok. Querstrahlwanderfeldröhre, f rus. лампа бегущей волны с поперечным лучом, f pranc. tube à faisceau transversal …   Radioelektronikos terminų žodynas

  • gyromagnetic traveling-wave tube — giromagnetinė bėgančiosios bangos lempa statusas T sritis radioelektronika atitikmenys: angl. gyromagnetic traveling wave tube vok. Gyro Lauffeldröhre, f rus. гиромагнитная лампа бегущей волны, f pranc. tube à onde progressive gyromagnétique, m …   Radioelektronikos terminų žodynas

  • helix traveling-wave tube — spiralinė bėgančiosios bangos lempa statusas T sritis radioelektronika atitikmenys: angl. helix traveling wave tube vok. Helix Lauffeldröhre, f rus. лампа бегущей волны со спиральной замедляющей системой, f; спиральная лампа бегущей волны, f… …   Radioelektronikos terminų žodynas

  • coupled-cavity traveling-wave tube — bėgančiosios bangos lempa su susietais rezonatoriais statusas T sritis radioelektronika atitikmenys: angl. coupled cavity traveling wave tube vok. Lauffeldröhre mit gekoppelten Hohlraumresonatoren, f rus. лампа бегущей волны с связанными… …   Radioelektronikos terminų žodynas

  • M-type traveling-wave tube — bėgančiosios bangos M lempa statusas T sritis radioelektronika atitikmenys: angl. M type traveling wave tube vok. M Typ Lauffeldröhre, f; M Typ Wanderfeldröhre, f rus. лампа бегущей волны М типа, f pranc. tube à onde progressive de type M, m …   Radioelektronikos terminų žodynas

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