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WO/2001/033599A1 |
An RF transmitter (20), such as a radar transmitter or a communications amplifier, is provided that includes a plurality of RF power tube sections (34, 36) each sharing a common collector (38). The RF tube sections (34, 36) may comprise ...
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WO/2001/016051A1 |
The invention is concerned with a method of forming a joint between a CVD (chemical vapour deposition) diamond and a metal support structure, and with a joint formed by the method. In the method, a CVD diamond body (14) is bonded to a ce...
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WO/2001/006532A1 |
The inventive multiple beam regenerating amplifier comprises an electrooptic vacuum system with multiple electrodes and consists of the following: a cathode unit (1); electron beam ports (7-9) arranged one after another downstream from s...
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WO/2000/072413A2 |
The invention relates to a miniaturized terahertz radiation source based on the Smith-Purcell effect. According to the invention, an energy-rich electron beam is emitted from a focused electron source at a defined distance across a metal...
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WO/2000/039832A2 |
The invention concerns a travelling wave tube designed to operate as amplifier in several frequency bands (B1, Bi, Bn), comprising a microwave frequency line (8) carrying electrons and wherein a signal is amplified. The microwave frequen...
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WO/2000/034976A1 |
A crossed-field device, such as a crossed-field amplifier, includes a cathode body portion (14) and an anode body portion (16) which cooperate with a crossed magnetic field to maintain electrons in a cycloidal path and to amplify an inpu...
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WO/2000/030145A1 |
A low-power wide-bandwidth klystron (10) comprises a cathode (12) having an electron emitting surface (14) capable of emitting an electron beam (22) and a collector spaced from said cathode (12) and designed to collect the electron beam ...
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WO/2000/030144A1 |
The invention concerns a multiple beam electronic tube, constructed about a main axis (XX'), whereof the beams (1, 2) are generated by substantially cylindrical cathodes (3, 4), some (4) offset relative to the main axis (XX') producing o...
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WO/2000/002226A1 |
The invention concerns a multibeam electronic tube with several substantially parallel electron beams (1-7), passing through a body (10). Some (2-7) of the beams (1-7) at least define an interbeam volume (22), each beam (2-7) defining th...
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WO/1999/052123A1 |
A signal output assembly for an inductive output amplifier comprises a primary output cavity (50) including a drift tube enclosing a modulated electron beam. The density modulated beam passes across a gap separating portions (32, 34) of ...
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WO/1999/035663A1 |
The present invention pertains to the field of magnetrons, wherein the purpose of said invention is to provide a more efficient use of the working surface in field emitters and to increase device reliability in conditions of increased me...
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WO/1999/035662A1 |
The present invention pertains to the field of M-type microwave devices, wherein the purpose of said invention is to provide a more efficient use of the working surface in field emitters, to increase the reliability thereof, to improve t...
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WO/1999/028943A1 |
An electron beam tube such as a klystron includes a penultimate resonant cavity (22) located before the output cavity (14). The penultimate resonant cavity (22) is arranged to be inductively coupled, being resonant at a frequency which i...
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WO/1997/038436A1 |
A klystron using periodic permanent magnet arrays (PPMs) (2a, 2b) for focusing the electron beam. The PPMs (2a, 2b) are selected to have magnetic periods that are less than 1/4 of the plasma wavelength of the electron beam for low beam i...
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WO/1997/027610A1 |
The device for grouping electron bunches is intended for use in wideband klystron-type devices comprising one or more klystrons. The proposed device is located in front of the output electrodynamic system of the device and comprises an i...
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WO/1996/032735A2 |
An inductive output tube, e.g., a KLYSTRODE, or a klystron, has a substantially hollow electron beam traversing a resonant cavity excited to the TM0x0 mode, where x is greater than 1.
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WO/1996/008834A1 |
There is provided a tunable high power magnetron (10). An annular anode (12) circumscribes a cathode (14) and contains a plurality of resonating cavities (20). The volume of the resonating cavities (20) determines the output frequency of...
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WO/1996/002064A1 |
The invention relates to a device for generating the magnetic guide field in gyrotrons based on permanent magnets. The advantages with the layout of the magnets is that gyrotrons using hot magnets can be converted to permanent magnet ope...
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WO/1995/026039A1 |
The invention relates to magnetron-type microwave devices containing a cylindrical anode arranged coaxially within it and a cathode assembly separated by an inter-electrode space and provided with lateral focusing rings, as well as a sec...
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WO/1994/024690A2 |
A linear electron beam tube such as an IOT includes an input cavity (6) formed from an inner body portion (12) and an outer body (13) which are joined together by a generally cylindrical electrical insulator (14). The input cavity (6) su...
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WO/1994/016338A1 |
By using a sheet beam (26) and a charge-storing target (36) measuring differential of the deposited charge, one can greatly improve the performance of a scan converter (10). A segmented target (190) provides instantaneous analog output.
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WO/1994/010699A1 |
The invention concerns a method of significantly increasing the efficiency of a gyrotron and a gyrotron designed to carry out the method. Optimum matching of the gyrotron geometry and the magnetic field enables the overall efficiency to ...
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WO/1993/023867A1 |
A super-power, high voltage klystron (10) includes an output cavity (18) operating in the TM01X mode, where X is greater than zero.
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WO/1993/021648A1 |
A magnetron comprises an anode (1) and, coaxially mounted inside it, a cathode consisting of a rod (2) with elements located on its surface and providing for primary and secondary emission. The element providing for primary emission cons...
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WO/1993/021647A1 |
A magnetron comprises a cathode (2) and an anode (1) having a plurality of circumferentially spaced resonant cavities (4). An output arrangement includes a generally cylindrical resonant cavity (6) disposed co-axially at one end of the p...
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WO/1992/014256A2 |
A small-size, coaxial magnetron comprises in concentric arrangement a central cathode (1) surrounded by a ring-shaped anode (2) itself surrounded by a coaxial cavity (20) coupled to the anode. The coaxial cavity (20) contains a closed pe...
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WO/1992/013357A1 |
A gyrotron having an annular collector (25') for an expanded e-beam (10) and a gyrotron output waveguide (20') with an annular gap (24') for passing the expanded e-beam is provided with a mode converter (30) between the resonator (16) an...
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WO/1991/020090A1 |
A compact device called the split cavity modulator (10) whose self-generated oscillating electromagnetic field converts a steady particle beam (40) into a modulated particle beam (42). The particle beam experiences both signs of the osci...
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WO/1990/013905A1 |
Energie is converted by launching a bundle of discrete self-contained electrons. The bundle is guided along a path defined by a channel (584) in a dielectric (582). Energy from the bundle is transferred by a charge transfer mechanism to ...
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WO/1990/009674A1 |
The invention relates to a hyperfrequency wave generator which uses an electron beam and the phenomenon of oscillating virtual cathode, but which allows to obtain a spectral quality energy and a conversion yield which are improved with r...
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WO/1990/009029A1 |
The invention provides for a device producing ultrahigh frequency energy from an electron beam. It mainly comprises: an electronic gun (1) producing an electron beam (8) in a so-called injection zone (3); modulating ultrahigh frequency c...
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WO/1990/007800A1 |
The converter consists of a section (1) of a non-regular waveguide provided on its internal surface with a plurality of interconjugating and interchanging SHF focusing and dispersing mirrors (2, 3) located along the axis (6) of the secti...
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WO/1989/012311A1 |
There is provided a high performance extended interaction output circuit (EIOC) (10) having two cavities (12 and 14). The EIOC (10) of the present invention has an image impedance (ZI) which is twice the magnitude of its output load resi...
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WO/1989/011754A1 |
There is provided a miniature high gain forward wave crossed-field amplifier wherein the anode slow wave structure (32) includes double helix coupled vanes (19) having a predetermined pitch such that the distance between the plane of sym...
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WO/1989/011728A1 |
An electron tube for achieving high power at high frequency with high efficiency, including an input coupler (50), a ribbon-shaped electron beam (25) and a traveling wave output coupler (20). The input coupler (50) is a lumped constant r...
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WO/1989/010000A2 |
A high-power microwave/mm-wave oscillator is filled with an ionizable gas at a pressure of about 1-20 mTorr, into which an electron beam (34) is injected at a high current density of at least about 1 amp/cm2, but typically 50-100 A/cm2. ...
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WO1989010000A1 |
A high-power microwave/mm-wave oscillator is filled with an ionizable gas at a pressure of about 1-20 mTorr, into which an electron beam (34) is injected at a high current density of at least about 1 amp/cm?2, but typically 50-100 A/cm?2...
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WO/1989/010002A1 |
A plasma wave tube is described in which a pair of counterpropagating electron beams (6, 8) are injected into a waveguide housing (2) in which a plasma is formed, preferably by an array of fine wire anodes (4). The electron beams couple ...
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WO/1989/010001A2 |
A plasma wave tube and associated operating method are described in which a pair of cold-cathode electron beam generators discharge counterpropagating electron beams (2, 4) into an ionizable gas, preferably hydrogen or a noble gas, withi...
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WO/1989/006869A1 |
The transformer is arranged between a source of electromagnetic waves (3), operating in a frequency band, and a wave guide (2) transmitting the power or energy. Said wave guide (2) is energized by the electromagnetic wave source (3) in a...
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WO/1989/006445A1 |
Multipactor device (10) has a waveguide bandpass filter structure (14) including a plurality of spaced pairs of opposing electrodes (16, 18) defining respective gaps therebetween in which multipactor action can occur in response to input...
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WO/1986/001032A1 |
An electron gun (10) that suppresses the non-linear space charge forces and phase-dependant focusing forces that are chiefly responsible for the high emittance of conventional electron guns. The gun comprises a resonant microwave cavity ...
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WO/1985/000074A1 |
A cathode/grid assembly for effecting a dual power mode electron gun for use with a travelling wave tube. The conventional "shadow grid" (210) is both electrically and mechanically isolated from the cathode (100). A variable voltage sour...
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WO/1980/002621A1 |
The device comprises a means (1) for forming a charge-particle beam, and, located coaxially and consecutively along the beam, an accelerating tube (2) for imparting to the beam speeds close to the light speed, a deflecting system (4) for...
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WO/1980/001622A1 |
An amplifying klystron with a coaxial energy outlet has an output resonator with a coupling gap and passive resonators constituting a filter system. A case (7) with short-circuiting bars (8, 9) is mounted coaxially outside the output res...
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WO/1980/001332A1 |
A method of correction of phase shift in an multi-cavity klystron consisting in partial branching-off the signals from the output and intermediate resonators (4) and (3) of the klystron (1), adding up the branched off signals, their ampl...
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JP2024051742A |
[Problem] In a gyrotron, it is possible to stabilize the voltage applied to the power source that accelerates the electron beam and the power source necessary for oscillation while reducing the manufacturing cost and operating cost of th...
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JP2024051743A |
[Problem] In a gyrotron, it is possible to stabilize the voltage applied to the power source that accelerates the electron beam and the power source necessary for oscillation while reducing the manufacturing cost and operating cost of th...
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JP2024001498A |
The present invention provides an electromagnetic wave generating device that can uniformly form electric field distribution and pressure distribution inside a waveguide and prevent generation and propagation of electromagnetic waves fro...
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JP2023549866A |
Creates a VED having multiple two-dimensional layers of different materials joined together to form one or more vacuum electronic devices (VED) simultaneously. The two-dimensional material layers are machined to include the features nece...
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