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Class Information
Number: 330/44
Name: Amplifiers > With electron beam tube amplifying device
Description: Subject matter wherein the amplifying device is a vacuum tube provided with means to form the electric space discharge into a restricted beam or ray, usually pencil-like.

Sub-classes under this class:

Class Number Class Name Patents
330/46 Having deflecting means 6
330/45 Having electrode coupled to cavity resonator 59

Patents under this class:

Patent Number Title Of Patent Date Issued
8624494 High frequency helical amplifier and oscillator Jan. 7, 2014
8624495 High frequency helical amplifier and oscillator Jan. 7, 2014
8618736 High frequency helical amplifier and oscillator Dec. 31, 2013
8441191 Multi-cavity vacuum electron beam device for operating at terahertz frequencies May. 14, 2013
8242696 Vacuum electronic device Aug. 14, 2012
8212481 Voltage control apparatus, power supply apparatus, electron tube and high-frequency circuit system Jul. 3, 2012
8179048 High frequency helical amplifier and oscillator May. 15, 2012
7936211 Controlling the performance of a thermionic tube May. 3, 2011
7898346 Power supply apparatus and high-frequency circuit system Mar. 1, 2011
7782130 Bowtie deflector cavity for a linear beam device Aug. 24, 2010
7688132 Method and apparatus for RF input coupling for inductive output tubes and other emission gated devices Mar. 30, 2010
7368874 Dynamic depressed collector May. 6, 2008
7218053 Electron beam tube output arrangement May. 15, 2007
7019601 Device for amplifying a high frequency signal Mar. 28, 2006
6909235 Power regulator for intermittent use of traveling wave tube amplifiers in communications satellites Jun. 21, 2005
6593579 RF modulated electron gun Jul. 15, 2003
6448850 Electromagnetic wave amplifier and electromagnetic wave generator Sep. 10, 2002
6359378 Amplifier having multilayer carbon-based field emission cathode Mar. 19, 2002
6300715 Very high power radiofrequency generator Oct. 9, 2001
6232721 Inductive output tube (IOT) amplifier system May. 15, 2001
6191651 Inductive output amplifier output cavity structure Feb. 20, 2001
6133786 Low impedance grid-anode interaction region for an inductive output amplifier Oct. 17, 2000
6100639 Thin diamond electron beam amplifier for amplifying an electron beam and method of producing an amplified electron beam using same Aug. 8, 2000
6005351 Flat panel display device using thin diamond electron beam amplifier Dec. 21, 1999
H1758 Microwave amplifier having cross-polarized cavities Nov. 3, 1998
5767625 High frequency vacuum tube with closely spaced cathode and non-emissive grid Jun. 16, 1998
5691667 RF radiation absorbing material disposed between the cathode and anode of an electron beam tube Nov. 25, 1997
5592053 Diamond target electron beam device Jan. 7, 1997
5536992 Linear electron beam tubes arrangements Jul. 16, 1996
5497053 Micro-electron deflector Mar. 5, 1996
5164634 Electron beam device generating microwave energy via a modulated virtual cathode Nov. 17, 1992
5162747 Velocity modulation microwave amplifier with multiple band interaction structures Nov. 10, 1992
5119506 Circuit for automatically adjusting the rate of change of amplitude of an output signal over selected input signal amplitude bands Jun. 2, 1992
4949011 Klystron with reduced length Aug. 14, 1990
4905086 Television transmitter employing klystron with nonlinearity correction circuit Feb. 27, 1990
4894586 Crossed-field amplifier bias circuit and method for improved starting Jan. 16, 1990
4887049 Solid state space harmonic amplifier Dec. 12, 1989
4820688 Traveling wave tube oscillator/amplifier with superconducting RF circuit Apr. 11, 1989
4763043 P-N junction semiconductor secondary emission cathode and tube Aug. 9, 1988
4757269 Multi-gigawatt high-efficiency RF amplifier Jul. 12, 1988
4674513 Active microwave cavity for electron paramagnetic resonance (EPR) apparatus Jun. 23, 1987
4210845 Trirotron: triode rotating beam radio frequency amplifier Jul. 1, 1980
3942132 Combined electron beam semiconductor modulator and junction laser Mar. 2, 1976

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