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Class Information
Number: 330/45
Name: Amplifiers > With electron beam tube amplifying device > Having electrode coupled to cavity resonator
Description: Subject matter wherein at least one electrode is coupled to a cavity resonator.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8525588 Vacuum electronic device Sep. 3, 2013
8212481 Voltage control apparatus, power supply apparatus, electron tube and high-frequency circuit system Jul. 3, 2012
8050783 System and method for pre-distorting a device input Nov. 1, 2011
7898346 Power supply apparatus and high-frequency circuit system Mar. 1, 2011
7564312 Resonant amplifier Jul. 21, 2009
7474148 Amplifier comprising an electronic tube provided with collectors biased by at least two DC bias sources Jan. 6, 2009
7459855 Low-spurious-radiation microwave tube Dec. 2, 2008
7129504 Method and apparatus for generation and frequency tuning of modulated, high current electron beams Oct. 31, 2006
6998783 Inductive output tube having a broadband impedance circuit Feb. 14, 2006
6879208 Multi-stage collector having electrode stages isolated by a distributed bypass capacitor Apr. 12, 2005
6838829 Depressed collector for electron beams Jan. 4, 2005
6611719 Cancer thermotherapy Aug. 26, 2003
6380803 Linear amplifier having discrete resonant circuit elements and providing near-constant efficiency across a wide range of output power Apr. 30, 2002
6300715 Very high power radiofrequency generator Oct. 9, 2001
6191651 Inductive output amplifier output cavity structure Feb. 20, 2001
6163112 Device for quick frequency tuning of a microwave tube using a direct sensing means Dec. 19, 2000
RE36987 Compensating for non-linear effects in signal processing with active devices Dec. 12, 2000
6133786 Low impedance grid-anode interaction region for an inductive output amplifier Oct. 17, 2000
H1847 Magnicon amplifier operated at the second harmonic of the cyclotron frequency Apr. 4, 2000
5990621 Electron beam tubes including ceramic material for realizing rf chokes Nov. 23, 1999
H1771 Coupled cavity gyrotron-traveling-wave-tube amplifier Jan. 5, 1999
5773934 Resistive wall klystron amplifier having grounded drift tube Jun. 30, 1998
5726533 Cathode ray tube having an input resonator cavity Mar. 10, 1998
5698949 Hollow beam electron tube having TM.sub.0x0 resonators, where X is greater than 1 Dec. 16, 1997
5691667 RF radiation absorbing material disposed between the cathode and anode of an electron beam tube Nov. 25, 1997
5682084 Grid electron tube with a folded cavity structure Oct. 28, 1997
5650751 Inductive output tube with multistage depressed collector electrodes providing a near-constant efficiency Jul. 22, 1997
5606221 Electron beam tubes having a resonant cavity with high frequency absorbing material Feb. 25, 1997
5581153 Electron beam tube having resonant cavity circuit with selectively adjustable coupling arrangement Dec. 3, 1996
5581154 Resistive wall klystron amplifier Dec. 3, 1996
5548245 Electron beam tube arrangements having the input cavity comprised of electrically internal and external body portions Aug. 20, 1996
5536992 Linear electron beam tubes arrangements Jul. 16, 1996
5534820 Compensating for non-linear effects in signal processing with active devices Jul. 9, 1996
5521551 Method for suppressing second and higher harmonic power generation in klystrons May. 28, 1996
5402085 Process and device for compensation of phase instabilities of the wave amplified by a microwave tube Mar. 28, 1995
5386177 Plasma klystron amplifier Jan. 31, 1995
5355093 Compact microwave and millimeter wave amplifier Oct. 11, 1994
5304942 Extended interaction output circuit for a broad band relativistic klystron Apr. 19, 1994
5283534 High frequency amplifying apparatus with a collector which has a periodic amplitude variable longitudinal magnetic field therein Feb. 1, 1994
5281923 Amplifying arrangements which modulate an electron beam Jan. 25, 1994
5239272 Electron beam tube arrangements having primary and secondary output cavities Aug. 24, 1993
5162747 Velocity modulation microwave amplifier with multiple band interaction structures Nov. 10, 1992
5132638 High power klystron amplifier Jul. 21, 1992
5124664 Field emission devices Jun. 23, 1992
5065109 Electropneumatic band selector Nov. 12, 1991
4931695 High performance extended interaction output circuit Jun. 5, 1990
4908549 Motor-driven device for preadjusted frequency tunings for a klystron Mar. 13, 1990
4820996 Amplifying arrangements Apr. 11, 1989
4733192 Amplifying arrangements including a klystron having a power transfer characteristic which is substantially the same over its entire passband Mar. 22, 1988
4700146 Automatic tuning of cavity klystron using sampled RF output Oct. 13, 1987

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