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Class Information
Number: 331/79
Name: Oscillators > Beam tube
Description: Subject matter wherein (1) the active element of the oscillator comprises a space discharge device consisting of a source of charged particles, means for concentrating the particles into a directed beam, means for exerting a control on the beam (e.g., beam accelerating electrode, control grid, deflecting means, slow wave structure, buncher type resonator, reflector electrode, etc.) and means for deriving output oscillatory energy from the controlled beam.

Sub-classes under this class:

Class Number Class Name Patents
331/80 With beam sweeping or deflecting means 2
331/81 With electron bunching or velocity variation means 11

Patents under this class:

Patent Number Title Of Patent Date Issued
7898346 Power supply apparatus and high-frequency circuit system Mar. 1, 2011
7560716 Free electron oscillator Jul. 14, 2009
7403076 High frequency quasi optical power source capable of solid state implementation Jul. 22, 2008
7378914 Solid-state high-power oscillators May. 27, 2008
6448850 Electromagnetic wave amplifier and electromagnetic wave generator Sep. 10, 2002
6300715 Very high power radiofrequency generator Oct. 9, 2001
5805025 Radial electron-beam-breakup transit-time oscillator Sep. 8, 1998
5777572 Device for damaging electronic equipment using unfocussed high power millimeter wave beams Jul. 7, 1998
5719470 Gyrotron capable of outputting a plurality of wave beams of electromagnetic waves Feb. 17, 1998
5550432 Smart adaptive vacuum electronics Aug. 27, 1996
5374873 Gyrotron apparatus having vibration absorbing means Dec. 20, 1994
5373263 Transverse mode electron beam microwave generator Dec. 13, 1994
5281894 Dual cavity for a dual frequency gyrotron Jan. 25, 1994
5266868 Gyrotron including quasi-optical mode converter Nov. 30, 1993
5235248 Method and split cavity oscillator/modulator to generate pulsed particle beams and electromagnetic fields Aug. 10, 1993
5232902 Method and apparatus for modulating relativistic electron beams to produce microwaves using a superconducting passage Aug. 3, 1993
5187409 Gyrotron having a quasi-optical mode converter Feb. 16, 1993
5187408 Quasi-optical component and gyrotron having undesired microwave radiation absorbing means Feb. 16, 1993
5180944 Gyrotron with a mode convertor which reduces EM wave leakage Jan. 19, 1993
5164634 Electron beam device generating microwave energy via a modulated virtual cathode Nov. 17, 1992
5146184 Atomic clock system with improved servo system Sep. 8, 1992
5144194 Quasi-optical gyrotron having angularly spaced quasi-optical resonators lying in a common plane Sep. 1, 1992
5138230 Quasi-optical gyrotron having a rotatable mount for providing resonator mirrors of a selected frequency Aug. 11, 1992
5134341 Quasi-optical gyrotron having a yoke structure shielding the superconductive resonator from unwanted magnetic fields Jul. 28, 1992
5134342 Quasi-optical gyrotron having a hologram output coupling Jul. 28, 1992
5113154 Microwave generator device with virtual cathode May. 12, 1992
4745336 Microwave generation by virtual cathode with phase velocity matching May. 17, 1988
4730170 Virtual cathode microwave generator having annular anode slit Mar. 8, 1988
4661744 Electromagnetic energy generators having resonating cavity with reflecting zones Apr. 28, 1987
4596967 High power microwave generator Jun. 24, 1986
4583025 Autogenerator of beams of charged particles Apr. 15, 1986
4553068 High power millimeter-wave source Nov. 12, 1985
4395655 High power gyrotron (OSC) or gyrotron type amplifier using light weight focusing for millimeter wave tubes Jul. 26, 1983
4345220 High power microwave generator using relativistic electron beam in waveguide drift tube Aug. 17, 1982
4331934 Cerenkov submillimeter electromagnetic wave oscillator May. 25, 1982
4286230 Near millimeter wave generator with dielectric cavity Aug. 25, 1981
4122372 Dielectrically loaded waveguide for producing high power coherent microwave radiation Oct. 24, 1978

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