67 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.

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.

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.

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.

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.

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.

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.

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.

An electron gun. The electron gun includes an RF cavity having a first side with an emitting surface and a second side with a transmitting and emitting section. The gun also includes a mechanism for producing an oscillating force which encompasses the emitting surface and the section so electrons are directed between the emitting surface and the section to contact the emitting surface and generate additional electrons and to contact the section to generate additional electrons or escape the cavity through the section. A method for producing electrons.