Patents
Patents for H01J 25 - Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons (1,999)
10/1992
10/15/1992WO1992014256A3 Small-size coaxial magnetron
09/1992
09/22/1992US5150067 Electromagnetic pulse generator using an electron beam produced with an electron multiplier
09/22/1992US5149929 Microwave oven with inverter controlled power source
09/01/1992US5144194 Quasi-optical gyrotron having angularly spaced quasi-optical resonators lying in a common plane
08/1992
08/26/1992EP0500241A1 Velocity modulation microwave amplifier with multiple band interaction structures
08/25/1992US5142250 High power microwave generator
08/20/1992WO1992014256A2 Small-size coaxial magnetron
08/19/1992EP0499514A1 Mode converter and power-dividing device for a microwave tube, and microwave tube with such a device
08/11/1992US5138230 Quasi-optical gyrotron having a rotatable mount for providing resonator mirrors of a selected frequency
08/06/1992WO1992013357A1 Gyrotron with radial beam extraction
07/1992
07/28/1992US5134343 Quasi-optical gyrotron having an electron gun with alternating high and low density electron emitting segments
07/28/1992US5134342 Quasi-optical gyrotron having a hologram output coupling
07/28/1992US5134341 Quasi-optical gyrotron having a yoke structure shielding the superconductive resonator from unwanted magnetic fields
07/21/1992US5132638 High power klystron amplifier
07/21/1992CA1305534C High-frequency heating device
07/15/1992EP0494342A1 Sputtering cathode
06/1992
06/23/1992US5124664 Field emission devices
06/17/1992EP0490741A1 Microwave tube with a cavity having a dielectric structure, and method of making a tube cavity
06/03/1992EP0488852A1 Cathode for ultra high frequency tubes
06/03/1992EP0187852B1 Microwave electron gun
05/1992
05/27/1992EP0486677A1 Method and device for generating microwaves using a split cavity modulator
05/20/1992EP0471795A4 Energy conversion using charge particles
05/12/1992US5113154 Microwave generator device with virtual cathode
03/1992
03/31/1992US5101168 High efficiency high power microwave source
03/18/1992EP0475802A1 Klystron with broad instantaneous band
02/1992
02/26/1992EP0471795A1 Energy conversion using charge particles
02/25/1992CA2049714A1 Widened instantaneous passband klystron
02/19/1992CA2090391A1 Electon beam device
02/12/1992EP0470731A2 Traveling wave tube with gain flattening slow wave structure
02/11/1992CA1295673C High voltage power supply particularly adapted for a twt
01/1992
01/15/1992EP0465845A2 Microwave window
12/1991
12/26/1991WO1991020090A1 Method and device for generating microwaves using a split cavity modulator
10/1991
10/22/1991US5059928 Mode transformer for microwave energy transmission circuit
10/02/1991EP0449275A2 Microwave oven with invertor control power source
10/02/1991EP0449174A2 Gyrotron having a mode converter
09/1991
09/24/1991US5052003 Quasi-optical gyrotron
09/17/1991US5049782 Magnetron with harmonic suppression means
09/03/1991US5045749 Electron beam generator and electronic devices using such a generator
08/1991
08/29/1991DE4100775A1 Electron gun for gyrotron - ensures homogeneous distribution in electron beam by bounding emission region(s) at sides by non-emitting edge region(s)
08/27/1991US5043630 Electron gun with electron beam modulated by an optical device
08/14/1991EP0441569A2 Magnetrons
08/07/1991EP0440530A1 Multiple-beam microwave tube with coaxial outlet
08/07/1991EP0440529A1 Multiple-beam microwave tube with groups of adjacent cavities
08/06/1991US5038077 Gyroklystron device having multi-slot bunching cavities
07/1991
07/31/1991EP0438738A1 Quasi optical component for microwave radiation
07/30/1991CA1287129C High gain miniature cross-field amplifier
06/1991
06/11/1991US5023514 Longitudinal axis
06/05/1991EP0430461A2 Field emission devices
05/1991
05/21/1991US5018180 Energy conversion using high charge density
05/15/1991EP0426855A1 Converter of higher-order wave of a round waveguide into a mirror-type transmission line wave
05/14/1991US5015914 Couplers for extracting RF power from a gyrotron cavity directly into fundamental mode waveguide
05/07/1991US5014028 Triangular section permanent magnetic structure
03/1991
03/27/1991EP0144317B2 Grid structure for certain plural mode electron guns
03/26/1991US5003225 Method and apparatus for producing intense microwave pulses
02/1991
02/20/1991EP0413018A1 Hyperfrequency wave generator device with virtual cathode.
02/12/1991US4993033 High power fast switch
02/06/1991EP0411890A1 Gyrotron
02/06/1991CN1049069A Quasi-optical gyrotron
01/1991
01/30/1991EP0410217A1 Quasi-optical gyrotron
01/30/1991CN1048948A Quasi-optical gyrotron
01/30/1991CN1011451B High efficient micro wave tube
01/29/1991US4988956 High frequency oscillator
01/16/1991EP0407558A1 Amplifier or oscillator device operating at ultrahigh frequency.
12/1990
12/27/1990EP0403811A1 Quasi-optical gyrotron
12/19/1990EP0402631A1 Quasi-optical gyrotron
12/19/1990CN1047937A Concentricity adjusting technology for cathode and anode of magnetron
12/18/1990US4978889 Plasma wave tube and method
11/1990
11/27/1990US4973924 Mode converter for microwave power transmission circuit
11/06/1990US4968945 Open tube resonator test setup for conductivity measurements
11/04/1990WO1990013905A1 Energy conversion using charge particles
11/04/1990CA2054724A1 Energy conversion using charge particles
10/1990
10/30/1990US4967162 Stripline traveling wave device and method
10/24/1990EP0393485A1 Quasi-optical gyrotron
10/11/1990DE3910822A1 Electron beam tube
10/03/1990EP0390474A2 Klystron amplifier
10/03/1990EP0389562A1 Mode transformer for hyper-frequency power transmission circuit
09/1990
09/30/1990CA2013366A1 Klystron with reduced length
09/12/1990EP0387145A1 Electron beam generator and electronic devices using such a generator
08/1990
08/29/1990EP0384813A1 Electron gun with a beam modulated by an optical device
08/18/1990WO1990009674A1 Hyperfrequency wave generator device with virtual cathode
08/14/1990US4949011 Klystron with reduced length
07/1990
07/28/1990WO1990009029A1 Amplifier or oscillator device operating at ultrahigh frequency
07/12/1990WO1990007800A1 Converter of higher-order wave of a round waveguide into a mirror-type transmission line wave
06/1990
06/13/1990EP0372975A2 Couplers for extracting RF power from a gyrotron cavity directly into fundamental mode waveguide
06/12/1990US4933594 Electron collector for electron tubes
06/12/1990CA1270329A1 Wide-band extended interaction device
06/05/1990US4931695 High performance extended interaction output circuit
05/1990
05/22/1990US4928070 Low-noise crossed-field amplifier
05/15/1990US4926094 High-performance gyrotron for production of electromagnetic millimeter or submillimeter waves
05/15/1990US4926093 Gyrotron device
05/09/1990EP0367155A2 Extremely high frequency oscillator
04/1990
04/17/1990US4918049 Critical temperature; supercooling
04/10/1990US4916361 Plasma wave tube
03/1990
03/27/1990US4912367 Plasma-assisted high-power microwave generator
03/27/1990US4912366 Coaxial traveling wave tube amplifier
01/1990
01/31/1990EP0352961A1 Klystrode frequency multiplier
01/30/1990US4897609 Axially coupled gyrotron and gyro TWTA
01/09/1990CA1264375A1 Free electron diode oscillator
01/03/1990CN1038545A Efficient microwave tube
12/1989
12/14/1989WO1989012311A1 High performance extended interaction output circuit
1 ... 7 8 9 10 11 12 13 14 15 16 17 18 19 20