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8179045 |
Slow wave structure having offset projections comprised of a metal-dielectric composite stack
A traveling wave amplifier circuit to receive an RF wave and an electron sheet beam and to effect synchronized interaction therebetween. The circuit includes a wave guide having at least a first...
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8179048 |
High frequency helical amplifier and oscillator
Disclosed herein is a class of mm and sub mm wavelength amplifiers and oscillators operating with miniature helical slow wave circuits manufactured using micro fabrication technology. The helices...
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7952287 |
Traveling-wave tube 2D slow wave circuit
A two-dimensional circuit for a traveling-wave tube for millimeter and sub-millimeter electromagnetic waves synchronously interacts with an electron beam in a vacuum electronic microwave amplifier...
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7952288 |
Power supply apparatus and high-frequency circuit system
The present invention includes a Zener diode connected between a helix electrode and an anode electrode, a transistor that closes or opens a circuit between a cathode and an anode of the Zener...
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7898181 |
Traveling wave tube
A bottom portion of a metal tape is attached to an end portion of a helix. A coaxial inner conductor for input or output of a high frequency signal is fixed by its end portion being interposed...
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7893620 |
Traveling-wave tube turn-off body energy circuit
An apparatus that includes a traveling-wave tube having an electron gun having a cathode. The apparatus also includes a first power supply for establishing a first electric potential between the...
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7888873 |
Dynamic depressed collector
A biasing system for use with a multi-stage depressed collector of a high power amplifier includes one or more adjustable power sources. A power controller provides control signals to the power...
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7812540 |
Method for making electrodes and vacuum tube using same
The invention relates to vacuum tubes and especially to electron tubes. To produce the tube, and especially an electron collector comprising several electrodes, the electrodes are produced in the...
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7638946 |
Apparatus and method for trajectory modulation of an electron beam
An electron beam amplification device provides trajectory modulation of an electron beam, and includes an electron gun, a modulator, an interceptor, an output circuit, and a collector. The electron...
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7579778 |
Traveling-wave tube with integrated ion trap power supply
A traveling-wave tube system and a method for protecting a cathode of a traveling-wave tube system. The system has an electron gun and a power supply that applies an electric potential between a...
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7538608 |
Photonic crystal ribbon-beam traveling wave amplifier
A RF amplifier includes a RF input section for receiving a RF input signal. At least one single-sided slow-wave structure is associated with the RF interaction section. An electron ribbon beam that...
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7489084 |
Power supply apparatus and high frequency circuit system
A power supply apparatus for supplying predetermined supply voltages respectively to an anode electrode, a cathode electrode, a collector electrode, and a helix of an electron tube. The power...
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7368874 |
Dynamic depressed collector
A biasing system for use with a multi-stage depressed collector of a high power amplifier includes one or more adjustable power sources. A power controller provides control signals to the power...
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7315126 |
Folded waveguide traveling wave tube having polepiece-cavity coupled-cavity circuit
An amplifying device comprises an electron gun emitting an electron beam, a collector spaced from the electron gun, the collector oriented to collect electrons of the electron beam emitted from the...
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7230384 |
Robust RF interface in a TWT
Apparatus and methods provide a robust radio frequency (RF) interface for a helix-type traveling wave tube (TWT). As a vacuum device, the RF input to the TWT and the RF output from the TWT are...
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7230385 |
Collector arrangement
A collector for an electron beam tube comprises a plurality of electrode stages. The electrode stages are spaced from one another by a non-conductive spacer. The non-conductive spacer is located...
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7218053 |
Electron beam tube output arrangement
An electron beam tube of the type for amplification of RF signals comprising an electron gun, an interaction region within a vacuum, an RF input and an RF output arrangement, the RF output...
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7190108 |
Methods and apparatus using pulsed and phased currents in parallel plates, including embodiments for electrical propulsion
First and second parallel conducting plates include arrayed conducting segments, preferably with specific spacing relative to each other and to the separation of the plates. Currents through the...
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7142052 |
Travelling wave amplifiers
A traveling wave amplifier (TWA) comprising two or more amplification modules, the inputs of adjacent amplification modules being connected together by a first inductance component of a first...
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7138860 |
System and method for envelope modulation
A power control system for a satellite receiving radio-frequency signals includes a digital processor and a traveling wave tube amplifier system and corresponding traveling wave tube. An anode...
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7071624 |
Microwave tube system and microwave tube
A microwave tube has a configuration in which the connection between an anode electrode and the helix is cut, the helix is grounded, and a current suppression element is provided between the anode...
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7067980 |
Shinged structures for vacuum microelectronics and methods of manufacturing same
An improved Klystron device is disclosed which has opposed electrostatic (ES) magnetic field generating members which are uniformly spaced along a longitudinal axis to form an electron beam...
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7034463 |
Traveling-wave tube having heat radiating structure with high thermal conductivity
A traveling-wave tube is provided which has a heat radiating structure with good heat conductivity from the collector core to the heat sink. An insulator is disposed around and in contact with the...
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7034462 |
Power supply circuit for traveling-wave tube which eliminates large relay and relay driving power supply
A power supply circuit for a traveling-wave tube disclosed herein eliminates a large relay and a relay driving power supply to reduce the size and cost and to make itself tolerable to vibrations...
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6987360 |
Backward wave coupler for sub-millimeter waves in a traveling wave tube
A slow wave structure for coupling RF energy with an electron beam comprises a co-propagating RF section including a plurality of pins having a uniform separation from the plane of an electron beam...
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6909235 |
Power regulator for intermittent use of traveling wave tube amplifiers in communications satellites
A traveling wave tube (TWT) amplifier includes a beam forming electrode (BFE) and a BFE modulator having a bias-based keyer so that the TWT amplifier signals are keyed off during periods when RF...
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6803725 |
On-chip vacuum microtube device and method for making such device
In accordance with the invention, improved vacuum microtube devices are provided with arrangements for tunably spacing the gate and the cathode. Tuning can be effected by using an electrostaic or...
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6777876 |
Power-supply unit for microwave tube
In a power-supply unit for a microwave tube, voltage between a helix power supply terminal and a cathode power supply terminal is divided into voltage slightly lower than the voltage of a collector...
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6747412 |
Traveling wave tube and method of manufacture
A traveling wave tube includes a glass or other insulating envelope having a plurality of substantially parallel glass rods supported therewithin which in turn support an electron gun, a collector...
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6664734 |
Traveling-wave tube with a slow-wave circuit on a photonic band gap crystal structures
A printed circuit Traveling-Wave Tube (TWT) with a vacuum housing containing either a pair of identical meanderline slow-wave interaction circuits or a pair of multi-arm spiral slow-wave...
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6653787 |
High power density multistage depressed collector
A collector for a linear beam has a segmented ceramic collector core that permits sustained operation at high temperatures and power densities. The collector provides efficient heat transfer from...
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6593695 |
Broadband, inverted slot mode, coupled cavity circuit
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...
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6586883 |
Method and apparatus for detecting individual TWT helix current for multiple TWT loads
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...
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6584675 |
Method for fabricating three dimensional traveling wave tube circuit elements using laser lithography
A method for constructing thermally and dimensionally stable traveling wave tube circuits having high dimensional stability, narrow tolerances, and very small size by providing a small hollow...
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6574248 |
Laminated wigglers
A wiggler that, when used in a free electron laser, reduces the harmonicity of the light emitted from the free electron laser. In general, the reduced harmonicity is accomplished by making the...
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6555964 |
Device, notably for controlling a travelling-wave tube
A power-supply device and amplifier are joined by way of a mechanical/thermal interface to form a unit. Electrical connections between the power-supply device and the amplifier chamber are run...
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6507152 |
Microwave/DC cyclotron wave converter having decreased magnetic field
A microwave/DC converter employing fast cyclotron wave of the electron beam. Coupling section for feeding energy into the electron beam contains two microwave cavities 3, 7. The second cavity 7 has...
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6495953 |
Cold cathode electron gun
To stabilize an emission current of cold cathode electron gun and extend its product life. A cold cathode electron gun comprises a cold cathode for emitting electrons by field-emission, a gate...
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6495961 |
TWT power supply with improved dynamic range
A power supply for a travelling-wave tube (TWT) includes a beam power supply (14) connected to the cathode and collector of the TWT, and a further power supply (20) connected to ground and to the...
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6486604 |
Traveling-wave valve arrangement
For a traveling-wave valve arrangement with a traveling-wave valve and a linearizing circuit arrangement, it is proposed to design the linearizing circuit arrangement and the traveling-wave valve...
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6483242 |
Traveling wave tube system with output waveguide-coupler termination
A traveling wave tube is coupled to an output waveguide by an output coupler. The output coupler includes a single integral hollow termination body having an inner surface and an outer surface. The...
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6483243 |
Multiband travelling wave tube of reduced length capable of high power functioning
A traveling wave tube designed to operate as an amplifier within plural frequency bands, which includes a microwave line through which electrons travel and in which a signal is amplified. The...
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6465965 |
Method and system for energy conversion using a screened-free-electron source
A method and device for providing power to a load are disclosed. A beam of free electrons is directed from a free-electron source, such as an electron gun, into an enclosing conductive surface. The...
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6456092 |
Network vector channel analyzer
In a vector network analyzer with a transmitting and, a receiving side, each including a downward mixing super heterodyne receiver, a high voltage power supply for providing an accelerating voltage...
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6369511 |
Travelling-wave tube amplifier
A travelling-wave tube amplifier comprises a travelling-wave tube, a plurality of collector electrodes, a plurality of collector leads and at least one magnetic core. The travelling-wave tube...
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6360084 |
Dual-band RF power tube with shared collector and associated method
An RF transmitter, such as a radar transmitter or a communications amplifier, is provided that includes a plurality of RF power tube sections each sharing a common collector. The RF tube sections...
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6356022 |
Tapered traveling wave tube
A structure to eliminate non-fundamental space harmonics in helical traveling wave tubes is disclosed. The helix radius and pitch are simultaneously varied over a short distance to improve the...
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6356023 |
Traveling wave tube amplifier with reduced sever
A structure to eliminate non-fundamental space harmonics in helical traveling wave tubes is disclosed. A sever of moderate attenuation is produced by way of a conductive surface on nonconductive...
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6344709 |
Microwave electron gun
An electron gun with a simple structure, wherein electrodes are extracted along the axis of the gun. The electron gun comprises first stepped metal cylinder 201 which is joined with cathode 200,...
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H002010 |
Double cusp gyro gun
A gyrotron gun that generates gyrating electron beams in a controllable manner suitable for use in a wide range of gyro-amplifiers and gyro-oscillators is disclosed. The gyrotron comprises first...
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