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WO/2003/054904A1 |
A method and apparatus to individually detect the cathode to helix current of multiple TWTs sharing a common cathode to helix voltage supplied by a single HV EPC, which provides the capability to determine which tube has exceeded the lim...
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WO/2003/054899A2 |
The invention concerns amplifying microwave operating tubes. The electronic tube comprises: a pumping tip (50) for producing vacuum inside the tube; an electron gun (11) emitting an electron beam (12) inside the tube; a collector (14) di...
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WO/2003/049133A2 |
An electron collector assembly for an electron beam tube comprises an electron collector (2), which is at least partially surrounded by dielectric material, such as a dielectric fluid (5). A heat pipe (6), in communication with the diele...
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WO/2003/046941A1 |
An electromagnetic radiation source (22) is provided which includes an anode (42) and a cathode (40) separated by an anode-cathode space (44). The source (22) further includes electrical contacts (54, 56) for applying a dc voltage betwee...
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WO/2003/043046A1 |
The electron impact surface (19) of an anode (13) is coated with a carbon nanotube coating (21) to reduce the production of secondary electrons and, concomitantly, to suppress the formation of neutral gases and plasma. A carbonizable res...
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WO/2003/043054A2 |
The invention relates to a high-pressure discharge lamp (1) provided with a discharge vessel (2) that is enclosed, with an interspace (3), by an outer bulb (4). The end of this outer bulb (4) is provided with a lamp cap (5). The lamp (1)...
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WO/2003/038854A1 |
An electron beam tube apparatus comprises a plurality of electron beam tubes (21, 22) having a common output cavity (25). Power is coupled to the common cavity from the resonant cavities (23, 24) of the beam tubes, and is then fed to an ...
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WO/2003/030204A2 |
The invention relates to a very high power microwave generator that employs the virtual cathode phenomenon. The inventive microwave generator (60) comprises an emission device (62) that can produce electrons in an output microwave circui...
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WO/2003/027994A2 |
A display system (10) which includes a cathode ray tube (CRT) feedback current replacement circuit (20) to simulate the cathode feedback current directly from the from the red, green and blue output biases of the drive signals of the vid...
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WO/2003/021625A1 |
The electron impact surface (19) of an anode (13) is coated with a pyrocarbon coating (21) to reduce the production of secondary electrons and, concomitantly, to suppress the formation of neutral gases and plasma. First, a coating of a c...
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WO2002086936B1 |
The invention relates to linear beam amplification devices (10) having an electron emitting cathode (40) and an RF modulated grid (30) closely spaced therefrom, and more particularly, to a novel support structure for the grid (30) that a...
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WO/2003/015264A1 |
The invention concerns a device for amplifying a high frequency signal. The invention is particularly adapted to transmit radiofrequency signals used for television or radio in frequency modulation. The high frequency signal amplifying d...
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WO2001057903A9 |
A self-guiding cover assembly for a vacuum electron device (VED) enclosure has a cover, a pair of guide plates, and a pair of guide elements. The cover has a top, a sidewall, an inside and an outside, and at least one electrical connecto...
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WO/2002/103904A2 |
A switching arrangement for a high voltage load provides high voltage pulses to the load. The switching arrangement includes switching modules (S1-Sn) where n is typically (75). A load capacitance is Cd is required to avoid voltage overs...
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WO/2002/099835A2 |
Apparatus and method are provided for using a multi-element field emission cathode in a color cathode ray tube. The field emission cathode may have from four to ten field emission arrays linearly arranged. The arrays are preferably forme...
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WO/2002/071435A1 |
The invention relates to a device (1) for producing high frequency microwaves comprising a cathode arrangement with heatable cathodes (15) for emitting electrons, two grid arrangements for controlling and focusing fluxes of electrons and...
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WO2000054305A9 |
An optoelectronic device (10) includes an evacuated chamber (12), a negatively-biased source electrode (20) disposed within the evacuated chamber and having a source lead (24) and a collector electrode (22) disposed within the evacuated ...
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WO/2002/065504A1 |
A magnetron comprises an anode (2) having vaner (3a, 3b) which define a plurality of cavities. A dielectric resonator (7) is located such that it is in communication with at least one of the vanes (3a, 3b). In use, the dielectric resonat...
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WO/2002/063652A1 |
The collector of a gyrotron is provided with a hollow cylindrical recess, running coaxial with the axis, in which the collector coil group, for directing the hollow electron beam from the resonator onto the collector wall, is coaxially e...
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WO/2002/037520A1 |
A structure to eliminate non-fundamental space harmonics in helical traveling wave tube (10) is disclosed. A sever (35) of moderate attenuation is produced by way of a conductive surface on nonconductive rods (25) supporting a helical co...
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WO/2002/029843A1 |
An electron field emission device is provided by placing a substrate in a reactor, heating the substrate and supplying a mixture of hydrogen and a carbon-containing gas to the reactor while supplying energy to the mixture of gases near t...
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WO/2002/025684A1 |
A vacuum electron device (50) for generating signals at microwave radio frequencies utilizes an electron source for emitting electrons through a field produced by a magnet in the RF section of a tube. After the electrons have passed thro...
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WO/2002/019371A1 |
A vacuum electron device for genesting signals at microwave radio frequencies utilizes an electron source for emitting electrons through a field focused by a magnet in the RF section of the tuber. After the electrons have passed through ...
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WO/2002/015217A1 |
A coaxial gyrotron has a central conductor which is placed on the cathode and consists of monotonically decreasing corrugations in a central, cylindrical area in an axial direction to the collector. The corrugations are evenly distribute...
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WO/2002/011167A1 |
An adaptive heater voltage algorithm and control system for setting and maintaining a vacuum electron device (VED) heater voltage, such as that of a klystron. An algorithm and control system are disclosed that sets and maintains the VED'...
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WO/2002/005306A1 |
A structure to eliminate non-fundamental space harmonics in helical traveling wave tubes (10) is disclosed. The helix (18) radius (24a, 24b) and pitch (22a, 22b) are simultaneously varied over a short distance to improve the efficiency a...
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WO/2001/097250A2 |
In a aspect of the disclosure an optical magnetron (22) is provided which includes a cylindrical cathode (40) having a radius rc, and an annular-shaped anode (42) having a radius ra and coaxially aligned with the cathode (40) to define a...
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WO/2001/093295A1 |
The present invention relates to electronics and particularly to field emitter used in M-type microwave devices. Methods of manufacturing a multi-layer field emitter (10', 10'', 10''', 10'''') are proposed such that the emitter (10', 10'...
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WO/2001/088945A1 |
A coupled cavity circuit for a microwave electron tube comprises at least two resonant cavities adjacent to each other. An electron beam tunnel passes through the coupled cavity circuit to allow a beam of electrons to pass through and in...
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WO/2001/075928A1 |
A magnetron includes a decoupling plate (16) located between the end hat (15) of the magnetron cathode (21) and an output coupling member (11). The use of the decoupling plate (16) presents a high impedance and gives a resonant circuit w...
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WO/2001/071762A1 |
A linear beam device (10) comprises a cathode (12) and an anode (18) spaced therefrom, with the anode (18) and cathode (12) being operable to form and accelerate an electron beam. An RF interaction region (22) having a drift tube (24) is...
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WO/2001/061723A1 |
A linear beam device (10) having a multi-stage depressed collector is provided with means that quickly removes the total voltage across the collector electrodes (22-32) upon detection of an arc between the collector electrodes. The linea...
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WO/2001/059802A1 |
A transducer suitable for generating signals in the terahertz region has a resonant cavity (4) with apertures (6) aligned with a cold cathode source (2) being a field emitter array. The resonant cavity (4) consists of an inner cylindrica...
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WO/2001/057906A2 |
In a multistage collector used in a linear beam tube such as an IOT or klystron, electrode stages (1, 2 and 3) are separated by ceramic rings (5 and 6) having metallised surfaces (7 and 9) to provide distributed bypass capacitors. This e...
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WO/2001/046985A2 |
A magnetron arrangment has a coaxial output (13) terminating in a probe (14) which launches energy from the magnetron along a rectangular waveguide (17). The coaxial output (13) is arranged in an endfire configuration with respect to the...
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WO/2001/046981A2 |
In a magnetron anode, an anode (6) surrounds a central cathode (1). The anode (6) is of a segmented structure having a plurality of annular segments (9) stacked together along its length. Each annular segment (9) includes a strap (10), t...
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WO/2001/041177A2 |
A microwave device with a secondary yield coefficient of less than 1 is produced by applying a coating of yttrium-iron-garnet to the inner surface of the device by sputtering.
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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/2001/026178A1 |
In a method of fabricating a tuning door for a resonant cavity, firstly contact fingers (10) are formed around the edge of a conductive plate (9) and the plate (9) is then fixed to a support (12) by, for example, double sided adhesive ta...
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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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WO2000028797A9 |
A drift tube linear accelerator incorporating an improved drift tube design, wherein the DTL comprises a resonance chamber maintaining a vacuum and having an inlet port and an exit port, an RF field source producing an oscillating radio ...
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WO/2000/079650A1 |
The invention concerns a microwave energy transmission module comprising a microwave tube (20) containing an amplifying structure (21) designed to amplify the energy injected at its input (E) and extracted at its output (S), and an anten...
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WO/2000/078099A1 |
High-voltage diodes (6) and (7) and high-voltage capacitors (8) and (9) making up a high-voltage circuit are connected and are molded of a resin (22) except that terminals (21a) and (21b) are drawn out as a small-sized high-voltage modul...
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WO/2000/077818A1 |
The invention relates to a travelling wave tube configuration with a travelling wave tube (LR) and a linearization circuit arrangement (S). The aim of the invention is to integrate the linearization circuit arrangement (S) and the travel...
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WO/2000/063944A1 |
An oil-cooling system is provided for a multi-staged depressed collector (40) of a linear beam device, such as an inductive output tube or klystron. The multi-staged depressed collector (40) comprises a plurality of electrode stages adap...
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WO/2000/048220A1 |
The invention concerns a field emitter array capable of microwave modulation, comprising at least an array (R) of emissive tips, means for producing a microwave modulation signal including a semiconductor element (S) controllable in micr...
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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/2000/030234A1 |
The invention relates to an auxiliary protection circuit placed on the load side of the pulse transformer of a power modulator, which is capable of limiting the energy liberated to a safe level when a disruptive breakdown occurs in the l...
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