71 results about "Rf cavity" patented technology

A method of drying an object comprising, providing an object into an RF cavity; applying broadband RF energy to the object in controlled manner which keeps the object within a desired temporal temperature schedule and within a desired spatial profile; and terminating the drying when it is at least estimated that a desired drying level is achieved.

An RF filter, e.g. RF cavity filter for adjusting coupling amount or transmission zero is disclosed. The RF filter includes a housing member in which cavities are defined by walls, resonators located in the cavities, a cover combined with an upper surface of the housing member, a first tuning element inserted into a first cavity of the cavities through the cover, and a second tuning element inserted into a second cavity of the cavities through the cover. Here, the first tuning element and the second tuning element are connected electrically.

An RF device comprising a plurality of drift tubes, each drift tube having a plurality of gaps defining resonant cavities, is immersed in an axial magnetic field. RF energy is introduced at an input RF port at one of these resonant cavities and collected at an output RF port at a different RF cavity. A plurality of electron beams passes through these drift tubes, and each electron beam has an individual magnetic shaping applied which enables confined beam transport through the drift tubes.

A device which improves the electrical and thermomechanical performance of an RF cavity, for example, in a disk-loaded accelerating structure. A washer made of polycrystalline diamond is brazed in the middle to a copper disk washer and at the outer edge to the plane wave transformer tank wall, thus dissipating heat from the copper disk to the outer tank wall while at the same time providing strong mechanical support to the metal disk. The washer structure eliminates the longitudinal connecting rods and cooling channels used in the currently available cavities, and as a result minimizes problems such as shunt impedance degradation and field distortion in the plane wave transformer, and mechanical deflection and uneven cooling of the disk assembly.

A process for preparing a cured composite material useful for radio frequency filter applications comprising the steps of: (a) providing a curable thermoset epoxy resin composition comprising (i) at least one epoxy resin; (ii) at least one toughening agent; (iii) at least one hardener; and (iv) at least one filler; (b) curing the curable thermoset epoxy resin composition of step (a) to form a cured composite; wherein the curable thermoset epoxy resin composition upon curing provides a cured composite product with a balance of properties comprising Tg, coefficient of thermal expansion, tensile strength, thermal conductivity; and having a density of less than 2.7 g / cc; and (c) coating at least a portion of the surface of the cured composite of step (b) with an electrically conductive metal layer to form a metalized coating on at least a portion of the surface of the cured composite. The cured composite material may be useful as a radio frequency cavity filter body housing for radio frequency filter applications.

In an electron accelerator, a conductive housing defines a cavity. Photoelectrons are emitted from a photocathode into the cavity when light is applied to the photocathode. Via an opening formed in a wall of the conductive housing, the photoelectrons are output to the outside of the cavity. Coolant is flowed through a flow path formed in the wall of the conductive housing, to suppress a temperature rise of the conductive housing. The wall of the conductive housing is made by a metal additive manufacturing technique in such a way as to produce a flow path that has a gentle trajectory without discontinuities in gradient.

The present invention is an RF cavity for accelerating electrons in imaging applications such as x-ray tubes and CT applications. An RF cavity having electron emitters placed therein accelerates the electrons across the cavity. The geometric shape of the cavity determines the electromagnetic modes that are employed for the acceleration of electrons. The fast electrons are used to generate x-rays by interacting with a target, either a solid or a liquid target. The electron accelerator may be used in an arc source for a stationary computed tomography application, in an x-ray tube, as a booster for an electron gun, and other imaging applications.

An RF cavity resonator (400) that includes: a resonator chamber (410) for containing an RF field; an RF coupling element (450, 452) coupled to the resonator chamber for introducing the RF field into and extracting the RF field from the resonator chamber; a tuning assembly (420) for causing the RF field to resonate at a desired frequency, wherein at least a portion of the tuning assembly is coupled within the resonator chamber; and a heat transport element (440) for transporting heat from the RF cavity resonator, wherein at least a portion of the heat transport element is coupled within the resonator chamber, the heat transport element including a phase change material, a housing for enclosing the phase change material, means for circulating the phase change material within the housing, and an electrically conductive surface for isolating the phase change material from the RF field.

An RF cavity filter is disclosed. The disclosed filter includes: a housing having at least one cavity defined; a cover coupled to an upper portion of the housing; at least one resonator contained within the at least one cavity; at least one hole formed in the cover; at least one grounding bolt configured to be inserted into the hole, having a screw thread formed on a part of an outer perimeter, and having a center hole in a center portion; and at least one tuning bolt inserted into the housing through the center hole along a screw thread formed on an inner perimeter of the center hole, where the grounding bolt has a flange part formed on a lower portion that is in contact with the tuning bolt and a lower portion of the cover.

A persistent ionization plasma generator is described that forms a plasma in a cavity that persists for a time after termination of the exciting RF electric field. The plasma generator includes a RF cavity that is in fluid communication with a source of ionizing gas. The RF cavity can be at substantially atmospheric pressure. An RF power source that generates an RF electric field is electromagnetically coupled to the RF cavity. An ultraviolet light source is positioned in optical communication to the cavity. An antenna is positioned within the cavity adjacent to the ultraviolet light source. A chamber for confining the plasma can be positioned in the cavity around the antenna.

Provided is a radio frequency (RF) cavity filter including a tuning bolt holding member, the RF cavity filter including a top block, a bottom block to form a cavity along with the top block, a resonator disposed in the cavity, a tuning bolt to penetrate through the top block, and a tuning bolt holding member disposed to be in contact with one end of the tuning bolt to hold the tuning bolt, which may fix a position of the tuning bolt.

Tunable RF cavity. The cavity includes a magnetostrictive material coupled to the cavity and a magnetic coil configured to impress a magnetic field on the magnetostrictive material. Control circuitry energizes the magnetic coil to control the shape of the magnetostrictive material, thereby to control the length of the cavity to tune its resonant frequency.

Disclosed are a tuning bolt ground connection structure and an RF cavity filter including the same. The disclosed filter comprises: a housing in which at least one cavity is defined; a cover which is coupled to the upper part of the housing; at least one resonator which is received in at least one cavity; at least one hole which is formed on the cover; at least one ground bolt formed with a screw thread on a portion of its outer surface and having a central hole; and at least one tuning bolt inserted into the inside of the housing through the center hole along screw threads formed on the inner surface of the center hole, wherein a flange section in contact with the lower part of the cover and the tuning bolt is formed in the lower part of the ground bolt.; According to the disclosed filter, the generation of PIMD can be minimized in the tuning bolt ground connection structure and sufficient ground area is obtained. Furthermore, there is less impact to the outside environment such as by vibrations.

As typically embodied, the present invention's RF cavity device comprises a rigid frame and plural flexible tiles. The frame includes walls of at least substantially uniform thicknesses that describe a hollow pillbox shape. The tiles are at least approximately equally thick, each tile being of at least substantially uniform thickness. Each tile includes a flexible metallic substrate and an HTS coating atop the substrate. The tiles are attached via their corresponding substrates to the inside wall surfaces of the frame so that their corresponding HTS coatings are interiorly exposed. The attached tiles flexibly conform to curved surface areas, are snugly set with narrow seams therebetween, and cover at least approximately the entirety of the frame's inside wall surfaces. A filler material is applied to the seams. The resultant tile configuration is characterized by at least approximate levelness of the exposed HTS coating surfaces and the filled seams.

An RF cavity resonator (400) that includes: a resonator chamber (410) for containing an RF field; an RF coupling element (450, 452) coupled to the resonator chamber for introducing the RF field into and extracting the RF field from the resonator chamber; a tuning assembly (420) for causing the RF field to resonate at a desired frequency, wherein at least a portion of the tuning assembly is coupled within the resonator chamber; and a heat transport element (440) for transporting heat from the RF cavity resonator, wherein at least a portion of the heat transport element is coupled within the resonator chamber, the heat transport element including a phase change material, a housing for enclosing the phase change material, means for circulating the phase change material within the housing, and an electrically conductive surface for isolating the phase change material from the RF field.

An RF cavity filter is disclosed. The disclosed filter includes: a housing having at least one cavity defined; a cover coupled to an upper portion of the housing; at least one resonator contained within the at least one cavity; at least one hole formed in the cover; at least one grounding bolt configured to be inserted into the hole, having a screw thread formed on a part of an outer perimeter, and having a center hole in a center portion; and at least one tuning bolt inserted into the housing through the center hole along a screw thread formed on an inner perimeter of the center hole, where the grounding bolt has a flange part formed on a lower portion that is in contact with the tuning bolt and a lower portion of the cover.

An electron spectroscopy system and method are disclosed. In another aspect, an ultrabright and ultrafast angle-resolved electron spectroscopy system is provided. A further aspect of the present system employs an electron gun, a radio frequency cavity and multiple spectrometers. Yet another aspect uses spectrometers in an aligned manner to deflect and focus electrons emitted by the electron gun. Moreover, an ultrafast laser is coupled to an electron spectroscopy system. A bunch of monochromatic electrons have their energy compressed and reoriented in an additional aspect of the present system. A further aspect of the present electron spectroscopy system employs adaptive and / or adjustable optics to optimize both time and energy compression. Another aspect provides at least two RF lenses or cavities, one before a specimen and one after the specimen.

The invention discloses of an RF cavity device capable of automatic tuning. The device comprises a housing, multiple cavity bodies formed in the interior of the housing, a resonator for storing the cavity bodies and a cover connected to the upper part of the housing. The cavity bodies are arranged to form multiple filtering circuits for independently carrying out filtering. Multiple short-circuit needles are inserted into first cavity bodies respectively connected to input ports of the filtering circuits via the cover. The short-circuit needles are electrically isolated from resonators stored in the first cavity bodies in the first state, and are electrically circuit shorted with the resonators stored in the first cavity bodies in the second state. The device are capable of conveniently automatic tuning via the short-circuit needles.

The present invention is directed to a piezo-electrically actuated membrane (ex.—a tuner) configured for use with a tunable cavity filter. The piezo-electrically actuated tuner may be formed of printed circuit board materials and may be placed over the cavities of the tunable cavity filter. Further, the piezo-electrically actuated tuner may promote high level performance of the tunable cavity filter, while allowing the tunable cavity filter to be tunable across wide bands.

The invention discloses a miniaturized Ku-band ODU (Out-Door Unit) module, which includes a transmitting channel module and a receiving channel module. The transmitting channel module includes a firstbox which is divided into a first upper cavity body and a first lower cavity body separated from each other. The first upper cavity body is internally provided with a first intermediate frequency cavity, a first radio frequency cavity, a first power cavity and a first cavity filter. The first lower cavity body is internally provided with a first local oscillation circuit which is connected to thefirst radio frequency cavity through a first insulator and a first hole-containing micro-strip line. The receiving channel module includes a second box which is divided into a second upper cavity body and a second lower cavity body separated from each other. The second upper cavity body is internally provided with a second cavity filter, a second radio frequency cavity, a second intermediate frequency cavity and a second power cavity. The second lower cavity body is internally provided with a second local oscillation circuit which is connected to the second radio frequency cavity through a second insulator and a second hole-containing micro-strip line. The ODU module has the advantages of small size, low power consumption, stability, reliability and applicability to a wide frequency bandrange.

An electron gun for generating an electron beam is provided, which includes a secondary emitter. The secondary emitter includes a non-contaminating negative-electron-affinity (NEA) material and emitting surface. The gun includes an accelerating region which accelerates the secondaries from the emitting surface. The secondaries are emitted in response to a primary beam generated external to the accelerating region. The accelerating region may include a superconducting radio frequency (RF) cavity, and the gun may be operated in a continuous wave (CW) mode. The secondary emitter includes hydrogenated diamond. A uniform electrically conductive layer is superposed on the emitter to replenish the extracted current, preventing charging of the emitter. An encapsulated secondary emission enhanced cathode device, useful in a superconducting RF cavity, includes a housing for maintaining vacuum, a cathode, e.g., a photocathode, and the non-contaminating NEA secondary emitter with the uniform electrically conductive layer superposed thereon.

A satellite system may include a reflector and a mast extending outwardly from the reflector. A radio frequency (RF) assembly may be carried by a distal end of the mast and include a conductive waveguide body having an RF cavity therein coupled with the reflector and a pin-receiving opening therein. An RF circuit module may include a housing carried by the conductive waveguide body, RF circuitry contained within the housing, and a signal coupling pin coupled to the RF circuitry and extending through the pin-receiving opening into the RF cavity.

A magnetron of improved performance capable of stabilizing the frequency and phase of magnetron output for use in particle accelerators and other applications. Thin variable-permeability blocks are attached inside the resonant anode structures of a standard magnetron design. A variable bias electromagnet, with field orthogonal in direction to the RF magnetic field, is used to vary the permeability of each block and therefore the resonant frequency of each anode structure. An electronic feedback control circuit adjusts the bias magnetic fields to lock in the frequency and phase of the magnetron output to an external low-level reference signal. Such devices may be used to provide synchronized high-power RF to many locations (e.g. the RF cavities of a particle accelerator), while requiring the distribution only of electrical power and an appropriate low-level RF reference signal.

The present invention relates to a cross-coupling control apparatus and an RF cavity filter having the same. The cross-coupling control apparatus comprises: a female coupling bolt, which has a cavity formed inside and a 1st hole formed on one surface; a male coupling bolt, which is inserted into the cavity that is formed in the female coupling bolt and has a 2nd hole formed on one surface in correspondence with the 1st hole; ; control bolts, which are inserted into the female coupling bolt and the male coupling bolt through the 1st and 2nd holes, come in contact with a 1st interface which is one of the interfaces of the 1st hole and with a 2nd interface which is one of the interfaces of the 2nd hole, and have a thread with a pattern of grooves and protrusions formed on at least part of a side surface, wherein the physical length of a coupling assembly formed by joining the female coupling bolt and the male coupling bolt is adjusted by moving the female coupling bolt in a 1st direction and the male coupling bolt in a 2nd direction opposite to the 1st direction, through the rotation of the control bolt. This apparatus has an advantage that a cross-coupling amount can be adaptively controlled.

The invention relates to the field of communication devices, and discloses a single-cavity resonator and a radio frequency cavity filter. The single-cavity resonator comprises a shell which is internally provided with a resonant cavity; a cover body which covers the shell, wherein the resonant cavity is located in the shell and the cover body; a resonant piece which comprises a sheet-shaped first resonant piece and a sheet-shaped second resonant piece, wherein the first resonant piece comprises a first connecting end and a first resonant end which are integrated, the first connecting end is connected with the resonant cavity, and the first resonant end is located in the resonant cavity and is separated from the inner wall of the resonant cavity; the second resonant piece comprises a second connecting end and a second resonant end which are integrated, the second connecting end is connected with the resonant cavity, the second resonant end is located in the resonant cavity and is spaced from the inner wall of the resonant cavity, the first resonance end and the second resonance end are spaced to form a frequency modulation interval. The single-cavity resonator is small in size, light in weight, simple in structure and few in parts, and is suitable for developing the radio frequency cavity filter which is small in size, light in weight, simple in structure and few in parts. The radio frequency cavity filter is small in size, light in weight, simple in structure and few in parts.

Disclosed is a new classification of Turbine Prime Mover, capable of producing high magnitudes of rotational speed, potential rotating energy and power production. The invention is a rotating machine adapted to be propelled by the net force created by asymmetric radio frequency resonant cavities (7). The turbine employs thrusters (7) electrically driven by microwave signals produced from adapted Klystron Tubes (3). By optimizing microwave production, and thruster pressures via the internal radio frequency cavity resonance, power in the field of the thruster by wave tube amplification, internal reflectivity and cooling, the principles of rotor-dynamics are applied to produce a new class of energy storage machine. Low power inputs yield high energy magnitudes over time accumulated thruster operation in the rotor. The turbine rotor is capable of acting as a prime mover for energy injection into a rotor mass, or can create real work by outputting rotational energy into torque.

A method and system for beam deflection. The method and system for beam deflection comprises a compact superconducting RF cavity further comprising a waveguide comprising an open ended resonator volume configured to operate as a trapped dipole mode; a plurality of cells configured to provide a high operating gradient; at least two pairs of protrusions configured for lowering surface electric and magnetic fields; and a main power coupler positioned to optimize necessary coupling for an operating mode and damping lower dipole modes simultaneously.

An RF cavity is provided with a plurality of tubes that are formed into a tubular cage in a predefined shape to define the RF cavity. A selected number of tubes and a selected tube diameter are provided to form a confinement cage for the RF fields within the RF cavity defined by the tubes. The multiple, small metal tubes are selectively bent to form different cavity shapes and sizes as needed to accelerate the particles and function as a confinement cage for the RF fields within the RF cavity defined by the tubes. The cost to fabricate RF cavities using the tubular cage design is significantly lower than the cost of producing a solid cavity using conventional fabrication technology.