Patents
Sitemap › H01 - Basic electric elements › H01J - Electric discharge tubes or discharge lamps › H01J 23 - Details of transit-time tubes of the types covered by group
Patents for H01J 23 - Details of transit-time tubes of the types covered by group (3,921)
08/1999
08/10/1999US5936335 Electron gun having a grid
08/10/1999US5936330 Apparatus for preventing filament shorting in a magnetron cathode
08/03/1999US5932972 Electron gun for a multiple beam klystron
08/03/1999US5932971 Optimally designed traveling wave tube for operation backed off from saturation
07/1999
07/29/1999WO1999037911A1 Ignition and combustion support device using microwave technology for a gasoline engine
07/29/1999DE19802745A1 Microwave technology ignition- and combustion-support device for IC engine
07/27/1999US5929720 Electromagnetic wave matching matrix using a plurality of mirrors
07/27/1999US5929567 Constant field gradient planar coupled cavity structure
07/27/1999US5929566 Collector structure for a travelling-wave tube having oxide film on cooling fins
07/27/1999US5929557 Field-emission cathode capable of forming an electron beam having a high current density and a low ripple
07/22/1999WO1999036960A1 Cooling device for an infrared detector
07/21/1999CN1223454A Magnetrons
07/20/1999CA2000757C Periodic permanent magnet structures
07/15/1999WO1999035663A1 Magnetron
07/15/1999WO1999035662A1 M-type microwave device
07/08/1999WO1999034229A1 Method for optimizing the magnetic field of a periodic permanent magnet focusing device
06/1999
06/23/1999EP0924740A1 Deformed sleeve electrode assembly
06/22/1999US5914067 Microwave oven equipped with a structurally simple microwave generating apparatus
06/10/1999WO1999028943A1 Electron beam tubes
05/1999
05/12/1999EP0915494A2 Magnetron
05/12/1999CN1216392A Magnetron with improved vanes
05/07/1999CA2252327A1 Magnetrons
04/1999
04/28/1999EP0911961A1 Additional circuit for a magnetron
04/13/1999US5894198 Magnetron with a fifth harmonic choke
04/13/1999US5894197 Device for attenuating unwanted waves in an electron tube
03/1999
03/24/1999EP0902959A1 Multi-stage electron gun having an electrostatic cavity
03/23/1999US5886592 Feedthrough ceramic capacitor having a grounding fitting for frictionally fixing the capacitor to a capacitor support
03/23/1999US5885916 Molded window comprising low aluminum or aluminum-free silicon nitride sintered together with silicon oxide and a rare earth oxide; microwaves
03/16/1999US5883367 Microwave oven equipped with a structurally simple apparatus for generating a microwave frequency energy
03/10/1999EP0900446A1 Electron gun having multiple emitting sections for generating multiple electron bunches
03/10/1999CN1210225A Microwave oven equipped with microwave generating apparatus designed to reduce secondary electron emission
03/10/1999CN1210224A Microwave oven equipped with structurally simple microwave generating apparatus
03/03/1999EP0667033B1 Method of increasing and/or ensuring the efficiency of a gyrotron, and a gyrotron designed to carry out the method
02/1999
02/23/1999US5874806 In a crossed-field amplifier
02/17/1999CN1208242A Grids
02/17/1999CN1208241A Grids
02/16/1999US5872428 Cavity coupling means rotatable in response to linear movement of an actuator
02/10/1999CN1207472A Microwave oven equipped with structurally simple apparatus for generating microwave frequency energy
02/03/1999EP0895266A1 Electron gun with photocathode
01/1999
01/20/1999CN1041786C Cooling device of magnetron
01/19/1999US5862462 Power enhancement techniques for high power satellites
01/19/1999US5861716 Magnetron having a cathode mount with a grooved recess for securely receiving a cathode filament
01/13/1999CN1041668C Support for waveguide system
01/12/1999US5859498 Multistage electron collector withstanding high voltages and electron tube provided with such a collector
12/1998
12/29/1998US5854536 Resonant cavity having a coupling oriface facilitate coupling to another resonant cavity
12/23/1998CN1202720A Magnetron
12/16/1998EP0884752A1 Grids
12/16/1998EP0884751A1 Grids
12/15/1998US5850074 Microwave oven equipped with a microwave generating apparatus designed to reduce secondary electron emission
12/13/1998CA2240302A1 Grids
12/13/1998CA2240301A1 Grids
12/09/1998EP0883154A1 Efficient, highly linear traveling wave tube using collector with high backstreaming current under saturated drive
12/09/1998EP0883153A1 Optimally designed traveling wave tube for operation backed off from saturation
12/09/1998EP0883151A1 High efficiency collector for traveling wave tubes with high perveance beams
12/09/1998CN1201360A Design method for magnetron for electronic range
12/03/1998WO1998054744A1 Electron gun with a diamond grid
12/02/1998CN1200460A Device for measuring temp. of magnetron for microwave oven
12/01/1998US5844366 Microwave apparatus
11/1998
11/24/1998US5841221 Collector for an electron beam tube
11/24/1998US5841114 Microwave oven equipped with a microwave output controlling apparatus
11/18/1998EP0878812A1 High-voltage through-type ceramic capacitor
11/18/1998CN1199279A High frequency oscillating apparatus
11/17/1998US5838107 Multiple-beam electron tube with cavity/beam coupling via drift tubes having facing lips
11/10/1998US5834898 High power current regulating switch tube with a hollow electron beam
10/1998
10/27/1998US5828173 Magnetic system for gyrotrons forming a wavy magnetic field
10/21/1998CN1196566A Magnetron device and manufacturing method thereof
10/14/1998EP0871196A1 Magnetron apparatus and manufacturing method for the same
10/13/1998US5821693 Electron beam tubes having a unitary envelope having stepped inner surface
10/06/1998US5818170 Gyrotron system having adjustable flux density
09/1998
09/30/1998EP0867910A1 Collector structure for a travelling-wave tube
09/29/1998US5814939 Mechanically tunable magnetron injection gun (MIG)
09/17/1998WO1998040903A1 Device, notably for controlling a travelling-wave tube
09/17/1998DE19710100A1 Anordnung insbesondere für die Ansteuerung einer Wanderfeldröhre This unit ideal for driving a traveling wave tube
09/15/1998CA2071099C Gyrotron apparatus having vibration absorbing means
09/09/1998EP0863535A1 Switch tube
09/02/1998EP0862198A2 A plate-type magnetron
09/02/1998CN1192036A Plate-type magnetron
08/1998
08/25/1998US5798613 Magnetron with ten anode vanes operating at 1250-1500 W
08/18/1998US5796212 Linear beam microwave tube with planar cold cathode electrode as electron beam source
08/18/1998US5796211 Microwave vacuum tube devices employing electron sources comprising activated ultrafine diamonds
08/12/1998CN1190488A Impregnated cathode structure, cathode substrate used for the structure, electron gun structure using the cathode structure, and electron tube
08/04/1998US5789876 Method and apparatus for generating and accelerating ultrashort electron pulses
07/1998
07/28/1998US5786666 Collector surface for a microwave tube comprising a carbon-bonded carbon-fiber composite
07/14/1998US5780970 Multi-stage depressed collector for small orbit gyrotrons
07/14/1998US5780969 Gyrotron apparatus including reflecting cylinders which provide undesired wave absorption
07/01/1998EP0764339A4 HOLLOW BEAM ELECTRON TUBE HAVING TM 0x0? RESONATORS, WHERE x IS GREATER THAN 1
06/1998
06/24/1998EP0781454A4 Frequency tunable magnetron
06/17/1998EP0848409A1 Longitudinal interaction microwave tube with output cavity past the collector
06/16/1998US5767749 Microwave oscillator
06/16/1998US5767625 High frequency vacuum tube with closely spaced cathode and non-emissive grid
06/11/1998WO1998025286A1 Method and device for setting the heating power of a magnetron cathode
06/10/1998EP0770264B1 Magnetic system for gyrotrons
06/03/1998CN1183852A Grid electron gun
06/02/1998US5760544 Magnetron microwave generator with filament-life diagnostic circuit
05/1998
05/19/1998US5754006 Broad-band traveling-wave tube with offsets on pole pieces and spacers
05/07/1998WO1998019323A1 Multi-stage depressed collector for small orbit gyrotrons
05/06/1998EP0840345A1 Field-emission cathode capable of forming an electron beam having a high current density and a little ripple
04/1998
04/28/1998US5744910 Periodic permanent magnet focusing system for electron beam
04/22/1998CN1179612A Feedthrough ceramic capacitor
04/21/1998US5742209 Four cavity efficiency enhanced magnetically insulated line oscillator
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