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WO/1990/012414A1 |
In order to drive a magnetron, a pulse voltage is applied to the gate electrode of a field-effect transistor to render it conductive. A storage capacitor is discharged through the primary winding of a pulse transformer and the field-effe...
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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/1989/012906A1 |
A coupled-cavity circuit (10) for a microwave electron tube is shown having one or more cavities (36) whose cross-sections are polygonally shaped, such as rectangles. Located in one or more corners of the polygonally shaped cavities (36)...
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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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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/1989/004233A1 |
A tubular blank (34) from which a slow-wave structure is to be formed is mounted on a mandrel (30) in front of and spaced slightly from an electrode (36) having a predetermined pattern of slots corresponding to areas along the tubular bl...
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WO/1989/004217A1 |
An electron cyclotron resonance (ECR) plasma source (10) for generating a plasma (P) for etching, deposition, predeposition and material property modification processes. The plasma source (10) includes two magnetic field sources (18, 20a...
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WO/1989/004051A1 |
A microwave tube (64) similar in structure to a magnetron includes an output port (66) and a separate input port (60). The tube includes a cathode (72), a reentrant anode circuit (74) and means for producing crossed electric and magnetic...
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WO/1988/004468A1 |
A dish-shaped dispenser cathode (28) is mounted at one end of a cathode housing (10), with a heater wire coil (42) mounted behind the cathode (28). A warm-up power supply (70) electrically connected between the central region and the per...
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WO/1988/004102A1 |
A plurality of longitudinally disposed dielectric support rods (14) are attached to the outer circumferential surface of a helical slow-wave structure (12) to form a subassembly (10). The subassembly (10) is mounted in a light press-fit ...
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WO/1988/001825A1 |
Treatment chamber, in particular for drying leather and similar, comprising as a heating system several magnetrons (M4) incorporated in the walls. The cooling devices (KV) of these magnetrons are permanent components of the treatment cha...
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WO/1987/006053A1 |
A plasma-anode electron gun includes a cathode means of a material such as molybdenum having a relatively high ratio of emission of secondary electrons to impinging helium ions. A hollow annular anode structure (16) contains an ionized p...
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WO/1987/004852A1 |
A variable frequency RFQ linear accelerator, has a sequence of variable inductance coils (9, 10) connected at intervals along the electric vanes (1, 2, 3, 4), to form an LC resonant circuit in relation to the operating frequency of the a...
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WO/1987/002507A1 |
Helical slow-wave structure (10) carrying three ceramic support rods (12, 14, 16) is inserted with clearance into the bore (22) of malleable barrel (20). Dies (24, 26) close around the barrel to malleably coin the barrel and close it dow...
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WO/1987/000680A1 |
System to prevent undesired oscillations generation within coupled cell (or coupled cavity) travelling wave tubes, in essence consisting of one or more lossy termination waveguide sections, transparent to the undesired oscillation freque...
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WO/1986/006217A1 |
An electrical interconnection assembly (12) for use with a high voltage device such as a traveling-wave tube (10). The assembly (12) includes an electrically insulating housing (32) having a plurality of recesses (36, 38, 40, 41) formed ...
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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/1985/002071A1 |
A tuning assembly (42) for selectively oscillating the frequency of an electromagnetic field within a hermetically sealed device (12), which device includes a rigid, hermetically sealed housing (14), apparatus for generating the electrom...
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WO/1985/001150A1 |
A dual-mode electron gun (110) for a traveling-wave tube which selectively generates an electron beam of two different cross-sectional areas. The electron gun (110) includes radially inner (118) and annular (120) control grids as well as...
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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/1984/000249A1 |
A buffer (18) for protecting the electron beam collector (12) of a travelling wave tube. The collector comprises an elongated tubular wall (13), an elongated tubular insulating wall (14) of one type of material, an elongated cylindrical ...
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WO/1982/001101A1 |
A magnetron for an electronic oven in which a drain electrode (60) is arranged at a position in the vicinity of a cathode (25) so as not to disturb the electron beam. The cathode and the drain electrode are spiral and arranged alternatin...
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WO/1981/002221A1 |
A reversible periodical magneto-focusing system comprises a sequence of oppositely magnetized permanent magnets (7) and magnetically soft pole parts (1) placed therebetween, each of those pole parts being provided with an opening for the...
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WO/1981/001628A1 |
A klystron comprises cavity resonators (5) with buttend walls (7) and drift tubes (8). The butt-end walls (7) and the drift tubes (8) are provided with radial slots (9) housing plates (10) made of a non-magnetic material and fixed firmly...
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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/1980/000282A1 |
A gun for a linear-beam electron tube has a control grid (40) for modulating the beam current which consists of an array of conductive web elements (50, 52) whose spacing from each other is much larger than their spacing from the concave...
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WO/1980/000049A1 |
Travelling wave tube with a periodic permanent magnet focusing system. Magnets (8a) of rare earth magnetic material with hubless pole pieces (5a) and pole piece spacers in the form of square section annular rings (7a) are utilised.
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WO/1979/000329A1 |
In a leading-in arrangement of cathode leads (85, 86) connecting with the cathode filament (68) which is placed along the center line of an evacuated external case (50) forming part of a cylindrical anode (51) of a magnetron, a magnet po...
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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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JP7444725B2 |
To suppress unnecessary modes attributable to an end hat suspension structure of a magnetron.The present invention comprises: a cylindrical anode 2; a plurality of vanes 3 joined to an inner surface of the anode 2; a cylindrical cathode ...
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JP2024016381A |
The present invention provides a high frequency input coupler that can suppress discharge in a high frequency transmission window. [Solution] A high frequency input coupler 10 includes a high frequency transmitting window structure 22 ha...
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JP7427575B2 |
According to one embodiment, an electron-emitting electrode includes a first member, a first diamond member, and a second diamond member. A surface of the first member includes a first region and a second region. The first diamond member...
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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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JP2023549863A |
Vacuum electronic devices (VEDs) having multiple two-dimensional layers of different materials are bonded together to form one or more VEDs simultaneously. The two-dimensional material layers are machined to include the features necessar...
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JP7385076B1 |
The present invention provides a magnetron capable of preventing damage to a coil and suppressing oscillation stoppage due to occurrence of abnormal oscillation. [Solution] The magnetron is a high-output industrial magnetron, and include...
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JP7367450B2 |
To provide a virtual cathode oscillator tube capable of achieving more higher output efficiency of electromagnetic waves, and an electromagnetic wave generation method using the virtual cathode oscillator tube.A virtual cathode oscillato...
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JP7365682B2 |
To provide a high-frequency heating device where a measure to protect a magnetron is taken at low cost.A high-frequency heating device comprises: a magnetron having a temperature characteristic; an inverter circuit part including a switc...
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JP7362355B2 |
To provide an alumina component for a magnetron that forms a uniform plating layer on a metallized layer formed on a terminal portion and a ring portion.In a magnetron ceramic component in which a terminal portion metallized layer and a ...
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JP2023146237A |
To provide a klystron capable of specifying a factor of failure.A klystron comprises: a negative electrode generating an electron; a pipe container having an input cavity, a middle cavity, and an output cavity; an output part that is con...
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JP7335442B2 |
In order to suppress the amount of time needed for the start-up of a microwave tube carried out when voltage fed from a power source has decreased, while avoiding increase in scale of a power storage unit, this power supply device includ...
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JP7324955B1 |
Kind Code: A1 An industrial magnetron capable of effectively cooling an anode cylinder and a magnet, suppressing deterioration in performance and failure of the anode cylinder and continuously operating the industrial magnetron, and the ...
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JP7324954B1 |
Kind Code: A1 An industrial magnetron and a method for manufacturing an industrial magnetron are provided that can sufficiently cool an anode cylinder even if the amount of heat generated by the anode cylinder increases, thereby suppress...
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JP2023108984A |
To provide a high-frequency window capable of preventing breakage of joints between a dielectric body and a lead-in sleeve and a lead-out sleeve.The high-frequency window includes: a disk-shaped dielectric body; a cylindrical lead-in sle...
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JP2023102829A |
To address problems in a conventional hollow beam formation method, in which it is difficult to reduce emittance, beam current/electron gun current ratio is extremely small, and most beam is absorbed at an anode or aperture, and in a con...
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JP7304225B2 |
To provide a magnetron capable of suppressing position fluctuations of a cathode due to vibration and the like.A magnetron includes: an anode structure; a cathode structure 1 including a cathode support arm 3 that holds a cathode 9 arran...
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JP7295250B2 |
The invention relates to the field of microwave emitting equipment, in particular to microwave oscillators. The proposed variants of an oscillator and a matrix-type microwave oscillator enable to efficiently direct microwave radiation fr...
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