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- Backward_wave_oscillator abstract "A backward wave oscillator (BWO), also called carcinotron (a trade name for tubes manufactured by CSF, now Thales) or backward wave tube, is a vacuum tube that is used to generate microwaves up to the terahertz range. It belongs to the traveling-wave tube family. It is an oscillator with a wide electronic tuning range.An electron gun generates an electron beam that is interacting with a slow-wave structure. It sustains the oscillations by propagating a traveling wave backwards against the beam. The generated electromagnetic wave power has its group velocity directed oppositely to the direction of motion of the electrons. The output power is coupled out near the electron gun.It has two main subtypes, the M-type, the most powerful, (M-BWO) and the O-type (O-BWO). The O-type delivers typically power in the range of 1 mW at 1000 GHz to 50 mW at 200 GHz. Carcinotrons are used as powerful and stable microwave sources. Due to the good quality wavefront they produce (see below), they find use as illuminators in terahertz imaging.The backward wave oscillators were demonstrated in 1951, M-type by Bernard Epszteinand O-type by Rudolf Kompfner. The M-type BWO is a voltage-controlled non-resonant extrapolation of magnetron interaction, both types are tunable over a wide range of frequencies by varying the accelerating voltage. They can be swept through the band fast enough to be appearing to radiate over all the band at once, which makes them suitable for effective radar jamming, quickly tuning into the radar frequency. Carcinotrons allowed airborne radar jammers to be highly effective. However, frequency-agile radars can hop frequencies fast enough to force the jammer to use barrage jamming, diluting its output power over a wide band and significantly impairing its efficiency.Carcinotrons are used in research, civilian and military applications. For example, the Czechoslovak air defense detection systems Kopac passive sensor and Ramona passive sensor employed carcinotrons in their receiver systems.".
- Backward_wave_oscillator thumbnail Backward-wave_Oszillator-Stockholm.jpg?width=300.
- Backward_wave_oscillator wikiPageExternalLink cv6124.htm.
- Backward_wave_oscillator wikiPageID "3057518".
- Backward_wave_oscillator wikiPageRevisionID "561526167".
- Backward_wave_oscillator hasPhotoCollection Backward_wave_oscillator.
- Backward_wave_oscillator subject Category:Microwave_technology.
- Backward_wave_oscillator subject Category:Terahertz_technology.
- Backward_wave_oscillator subject Category:Vacuum_tubes.
- Backward_wave_oscillator type Artifact100021939.
- Backward_wave_oscillator type Device103183080.
- Backward_wave_oscillator type ElectronicDevice103277771.
- Backward_wave_oscillator type Instrumentality103575240.
- Backward_wave_oscillator type Object100002684.
- Backward_wave_oscillator type PhysicalEntity100001930.
- Backward_wave_oscillator type Tube104494204.
- Backward_wave_oscillator type VacuumTubes.
- Backward_wave_oscillator type Whole100003553.
- Backward_wave_oscillator comment "A backward wave oscillator (BWO), also called carcinotron (a trade name for tubes manufactured by CSF, now Thales) or backward wave tube, is a vacuum tube that is used to generate microwaves up to the terahertz range. It belongs to the traveling-wave tube family. It is an oscillator with a wide electronic tuning range.An electron gun generates an electron beam that is interacting with a slow-wave structure. It sustains the oscillations by propagating a traveling wave backwards against the beam.".
- Backward_wave_oscillator label "Backward wave oscillator".
- Backward_wave_oscillator sameAs m.08nn_1.
- Backward_wave_oscillator sameAs Backward_wave_oscillator.
- Backward_wave_oscillator wasDerivedFrom Backward_wave_oscillator?oldid=561526167.
- Backward_wave_oscillator depiction Backward-wave_Oszillator-Stockholm.jpg.
- Backward_wave_oscillator isPrimaryTopicOf Backward_wave_oscillator.
