436results about "Transit-tube coupling devices" patented technology

In a dielectric window 41 for a plasma processing apparatus, a first dielectric window recess 47 is formed on an outer region of a surface of the dielectric window 41 in a diametrical direction of the dielectric window 41 at a side where plasma is generated, and the first dielectric window recess 47 is extended in a ring shape and has a tapered shape inwardly in a thickness direction of the dielectric window 41. A multiple number of second dielectric window recesses 53a to 53g are formed between the center of the dielectric window 41 and the first dielectric window recess 47, and each of the second dielectric window recesses 53a to 53g is recessed inwardly in the thickness direction of the dielectric window 41 from the surface of the dielectric window 41.

Use of a side resonator group comprising a plurality of side resonators, each including both an electromagnetically inductive function section made of a substantially ringed conductive material and an electrically capacitive function section made of a gap, so arranged in a circle as to make said electrically capacitive function sections opposed to the center as high frequency energy supply means, enables a high frequency discharge to take place in a smaller space than that observed in use of a conventional cavity resonator. Besides, application of said high frequency energy supply means to a high frequency electrodeless lamp device enables high frequency energy to be effectively coupled even with a relatively small size of electrodeless discharge lamp.

A method and apparatus for producing a distributed plasma at atmospheric pressure. A distributed plasma can be produced at atmospheric pressure by using an inexpensive high frequency power source in communication with a waveguide having a plurality particularly configured couplers disposed therein. The plurality of particularly arranged couplers can be configured in the waveguide to enhance the electromagnetic field strength therein. The plurality of couplers have internal portions disposed inside the waveguide and spaced apart by a distance of ½ wavelength of the high frequency power source and external portions disposed outside the waveguide and spaced apart by a predetermined distance which is calculated to cause the electromagnetic fields in the external portions of adjacent couplers to couple and thereby further enhance the strength of the electromagnetic field in the waveguide. Plasma can be formed in plasma areas defined by gaps between electrodes disposed on the external portions.

A cylindrical waveguide with a mode converter transforms a whispering gallery mode from a gyrotron cylindrical waveguide with a helical cut launch edge to a quasi-Gaussian beam suitable for conveyance through a corrugated waveguide. This quasi-Gaussian beam is radiated away from the waveguide using a spiral cut launch edge, which is in close proximity to a first mode converting reflector. The first mode converting reflector is coupled to a second mode converting reflector which provides an output free-space HE11 mode wave suitable for direct coupling into a corrugated waveguide. The radiated beam produced at the output of the second mode converting reflector is substantially circular.

The invention relates to an energy coupling device suitable for a rectangular-crossed double-gate slow-wave structure, belonging to the technical field of vacuum electronics. One end of the device is connected with a rectangular waveguide, and the other end is connected with a rectangular-crossed double-gate slow-wave structure; the part connected with the rectangular-crossed double-gate slow-wave structure comprises an upper row and a lower row of rectangular gate waveguide structures which are mutually staggered and distributed and have gradually changed height; the half-height positions of the rectangular gates at the upper row are in an upper datum plane (1); all half-height positions of the rectangular gates at the lower row are in a lower datum plane (2); counted from a port connected with the rectangular-crossed double-gate slow-wave structure, the heights of the upper row and the lower row of rectangular gates are gradually reduced to zero; and the maximum height of the rectangular gates does not exceed the rectangular gate height of the rectangular-crossed double-gate slow-wave structure. The invention has the advantages of favorably coupling a microwave signal into the rectangular-crossed double-gate slow-wave structure, favorably extracting the amplified microwave signal from the rectangular-crossed double-gate slow-wave structure and being easy to connect with a traditional standard waveguide device.

An X-band high gain and high efficiency triaxial relativistic klystron amplifier comprises a cathode holder 301, a cathode 302, an anode outer cylinder 303, an inner conductor 304, a modulation cavity305, a first reflection cavity 306, a first cluster cavity 307, a second reflection cavity 308, a second cluster cavity 309, a third reflection cavity 310, an extraction cavity 311, a cone waveguide312, a feedback loop 313, an electron collector 314, a support rod 315, a microwave output port 316, a solenoid magnetic field 317, and an injection waveguide 318, wherein the overall structure is rotationally symmetric about the central axis OZ axis. The amplifier, by rationally designing the electromagnetic structure of the device, overcomes the shortages such as complex structure, and relatively low gain (about 40 dB), efficiency (less than 30%) and output microwave power (about 1 GW) of axial injection or lateral dual-port injection in the existing X-band triaxial relativistic klystron amplifier, and realizes the high-gain, high-efficiency, and high-power microwave output of the triaxial relativistic klystron amplifier in the X-band.

To include a focused ion beam apparatus fabricating a sliced specimen by processing a specimen as well as observing the sliced specimen, a scanning electron microscope observing the slice specimen, a gas-ion beam irradiation apparatus performing finishing processing by irradiating a gas-ion beam onto a surface of the sliced specimen, a specimen stage on which the sliced specimen is fixed and having at least one or more rotation axis, a specimen posture recognition means recognizing positional relation of the sliced specimen with respect to the specimen stage and a specimen stage control means controlling the specimen stage based on a specimen posture recognized by the posture recognition means and an installation angle of the gas-ion beam irradiation apparatus in order to allow an incident angle of the gas-ion beam with respect to the obverse or the reverse of the sliced specimen to be a desired value.

A high-power microwave generator employing a plurality of inexpensive commercial magnetron tubes cross-coupled by means of a secondary coupling path between each magnetron output pair, whereby a portion of the output energy from a first magnetron tube is injected into a second magnetron tube and a portion of the output energy from the second magnetron tube is similarly injected into the first magnetron tube. The resulting cross-injection of microwave energies brings the respective magnetron tube pair into a phase-lock sufficiently stable to permit coherent combination of their outputs for many high-power microwave applications, such as directed energy weapon systems. The magnetron phase-locking system requires no external components other than the secondary coupling paths of this invention.

The invention discloses an internal-feedback-type terahertz traveling wave tube oscillator, and relates to a terahertz electromagnetic wave source technique. Based on a traveling wave tube, a feedback mechanism is introduced so as to form an oscillator. Compared with the existing traveling wave tube, the structure is characterized in that 1. a tuning device is added at an input port of the oscillator, and is a variable short circuit device; and 2. an output port is designed with a special method, so that the oscillator has certain reflection in a working frequency band, and the reflection coefficient is about 0.2. According to the oscillator provided by the invention, a feedback loop of an electromagnetic wave is introduced into the structure, the phase shift of the electromagnetic wave through the feedback loop is integral multiples of 2*pi, and under the condition that a slow wave structure provides sufficient gain, the device is oscillated, and one or a plurality of electromagnetic waves with specific frequency is / are output. Because the tuning device can introduce phase shift variations through methods of mechanical tuning and the like in the feedback loop, the frequency of a start oscillation electromagnetic wave also varies to meet the condition that the total phase shift of the feedback loop is integral multiples of 2*pi, so that the tunable characteristic is realized.

To include a focused ion beam apparatus fabricating a sliced specimen by processing a specimen as well as observing the sliced specimen, a scanning electron microscope observing the slice specimen, a gas-ion beam irradiation apparatus performing finishing processing by irradiating a gas-ion beam onto a surface of the sliced specimen, a specimen stage on which the sliced specimen is fixed and having at least one or more rotation axis, a specimen posture recognition means recognizing positional relation of the sliced specimen with respect to the specimen stage and a specimen stage control means controlling the specimen stage based on a specimen posture recognized by the posture recognition means and an installation angle of the gas-ion beam irradiation apparatus in order to allow an incident angle of the gas-ion beam with respect to the obverse or the reverse of the sliced specimen to be a desired value.

The invention provides an X-and-Ku-waveband power-adjustable microwave source. The device work mode can be changed through regulating the length of an inner conductor, and the X-and-Ku-waveband crossing conversion of the work frequency can be realized.

The present invention provides a relativistic magnetron with axial extraction, or magnetron with diffraction output (MDO), with a mode converter placed directly within the diffraction output of radiation to effectively convert the operating π-mode into a radiated mode of simpler radiation patterns.

Task To provide a projector using a light source device that is rapidly and reliably turned on and can stably obtain a desired amount of light and a method of rapidly and reliably turning on a light source device of a projector. Means for Resolution A power control unit adjusts the amplification factor of an amplifying unit for microwaves such that microwave power having a pulse form that is higher than the microwave power radiated to keep an electrodeless lamp emitting light is radiated to turn on the electrodeless lamp. Therefore, a microwave having predetermined power is radiated to the electrodeless lamp at once.

The invention relates to a high power box-shaped window which is characterized by improving and innovating the traditional structure and adopting boron nitride ceramic with low AgCuTi vacuum brazing dielectric constant, little dielectric loss and good high temperature heat conduction; thin-wall oxygen-free copper material which is externally sheathed with a protecting metal molybdenum ring is adopted by sealing-in circular waveguide; two effective ways of air cooling and water cooling can be selected when in cooling; therefore, the problems that the traditional high power window is hard to seal, high in power consumption, high in temperature after long time work and difficult in heat dissipation.

The invention discloses an energy coupler applicable to a cosine grating-loaded folded waveguide slow-wave structure. The end surfaces, which are vertical to the axis of the slow-wave structure, of various gratings between adjacent straight waveguide sections in a folded waveguide, with a periodic structure, of the folded waveguide slow-wave structure have cosine profiles at one side of a waveguide connection segment. The energy coupler comprises a rectangular waveguide; andmetal ridges are formed on the rectangular waveguide corresponding to cosine profile gratings at one side of the cosine grating-loaded folded waveguide slow-wave structure. The energy coupler disclosed by the invention is simple in structure, and is connected with the input and output of the cosine grating-loaded folded waveguide slow-wave structure with a complicated structure to form a high-frequency system with the energy coupler, so that the effective input / output of an electromagnetic field from the rectangular waveguide can be achieved.

The invention, which belongs to the vacuum electronic technology field, relates to an input / output structure of a broadband phase shift travelling wave tube. The structure comprises six parts of waveguide type elements: a first double-ridge loading rectangular wave guide; a double-ridge loading rectangular wave guide, which is in a bending state of 90 degrees; a second double-ridge loading rectangular wave guide; a double-ridge gradient double-ridge loading rectangular wave guide; a first rectangular wave guide and a second rectangular wave guide. The first double-ridge loading rectangular wave guide and the second double-ridge loading rectangular wave guide are respectively connected with two ends of the double-ridge loading rectangular wave guide that is in a 90 degree bending; the double-ridge gradient double-ridge loading rectangular wave guide is connected between the second double-ridge loading rectangular wave guide and the first rectangular wave guide; and the second rectangular wave guide is connected with an outboard curved surface window of the double-ridge loading rectangular wave guide that is in a 90 degree bending, wherein a central axis of the double-ridge loading rectangular wave guide that is in a 90 degree bending is superposed with a central axis of the first rectangular wave guide. According to the invention, broadband microwave signal energy and a band shape electronic beam can be well introduced and a sine wave guide structure can be lead out; besides, the input / output structure is simple and is easy to process and realize.

A method and apparatus comprising microwave radiation pulses to reduce a microorganism population in an object.

The invention discloses a diamond energy transmission window for short millimeter wave traveling tubes and a manufacturing method of the diamond energy transmission window and belongs to the technical field of vacuum electronics. The diamond energy transmission window comprises an energy transmission window leaf, a connecting wave guide and sealing window frames. The sealing window frames connected with the waveguide are symmetrically arranged on the upper and lower portion of the diamond energy transmission window, and the diamond window leaf is hermetically clamped between the window frames. The manufacturing method of the diamond energy transmission window includes: a, selecting a substrate silicon wafer; b, installing the substrate silicon wafer in a microwave plasma chemical vapor deposition device; c, inflating hydrogen gas; d, starting plasma discharging; e, increasing air pressure and microwave power and increasing substrate temperature to 850-950 DEG C; f, adding methane and starting growing diamond; g, finishing growing and taking out of diamond materials; h, grinding, polishing and cutting to obtain the window leaf by laser; i, metalizing the window leaf; and j, welding the window leaf and the window frames by centering. The diamond energy transmission window is superior to sapphire windows in both matching performance and transmission loss.

A high power RF energy device component is disclosed that is exposed to high power RF energy in a vacuum environment, and includes a multipactor-inhibiting carbon nanofilm covering at least one surface of the component. A secondary electron efficiency (SEE) coefficient of the multipactor inhibiting carbon nanofilm is desirably less than a SEE coefficient of the underlying surface of the component.

The invention belongs to a broadband multi-waveguide output device for a rotary traveling wave tube. The broadband multi-waveguide output device comprises a circular waveguide, long stripped rectangular waveguides and rectangular coupling holes, wherein the circular waveguide is provided with an input opening and an output opening, the long stripped rectangular waveguides are arranged on a circular waveguide casing at intervals in the axial direction and are provided with microwave output openings, the rectangular coupling holes are arranged between the circular waveguide and the rectangular waveguides, the axial lengths of all holes are identical, the center distances among all holes are identical, the widths of four front holes at two ends of each group of rectangular holes are in step-type arrangement from narrow to wide, the width of each hole in the middle is the same as the width of the fourth hole at the two ends, and in addition, an inclined coupling surface is also arranged at the junction part of each rectangular waveguide inner cavity front end surface and the circular waveguide. The multi-waveguide output device has the characteristics that the requirements of the millimeter band of high power, high gain and high frequency band for being matched with the rotary traveling wave tube to be used can be sufficiently met, the base parameters are provided for the optimization design of voltage reduction collection electrodes, and the like. The defects of narrow band width, matching use difficulty with the broadband rotary traveling wave tube, and the like in the prior art are overcome.

The invention discloses a frequency-multiplier klystron and a manufacture method thereof, relating to the technique of electron tubes. A microwave actuating signal with the frequency of f is used as an input signal; electron beams are in manual action with multiple resonant cavities of the conventional klystron in vacuum; ultraharmonics components in the Fourier spectrum of the electron beams are obviously increased after good cybotaxis is achieved; an output structure adopts the output structure of a wave band where frequency nf is positioned or utilizes the higher order mode of the conventional structure; the ultraharmonics components of the frequency nf, namely, the input frequency f and the output frequency nf, are derived from the electron beams in high cybotaxis so that the microwave small signal is amplified and the frequency is multiplied to nf from f strictly in integer multiples. The method of the invention is simple and easy to implement, and the manufactured frequency-multiplier klystron can keep comparative frequency multiplication grain, good spectrum purity, wider absolute frequency multiplication bandwidth and higher power capability.

The invention belongs to a millimeter wave expansion interaction device in a vacuum electronic device. The millimeter wave expansion interaction device comprises a device body which consists of a shell and a core body, an annular barrel-type coupling channel, circular annular resonant cavities and electron beam channels, output waveguide and coupling holes. The millimeter wave expansion interaction device adopts the cylindrical body and the circular annular resonant cavities which are formed around the axis of the core body in parallel at intervals; the lengths of inner circumference and outer circumference of the resonant cavities are far greater than working wavelengths; 5-19 resonant cavities and 5-20 electron beam channels can be set, and the lengths of the device can be greatly shortened, so that impedance, power capacity and output power of the device can be effectively improved; by means of controlling the radial dimensions of each resonant cavity to be within a range of 2 / 5-3 / 5<lambda> of the working wavelengths <lambda>, the long-term stable operation of the device in base mode state can be ensured; and therefore, the millimeter wave expansion interaction device has the characteristics of capability of improving output power of the device in a base mode state and working performance stability of the device, simple structure, simple and convenient production process, low production cost, long working service life and the like.

The invention provides a terahertz magnetic radiation source. The terahertz magnetic radiation source comprises an electron gun, an electron beam collection pole, a first slow wave structure, a drift segment and a second slow wave structure, wherein the first slow wave structure is arranged between the electron gun and the electron beam collection pole, an electron beam and the first slow wave structure jointly act to generate a cluster, the first slow wave structure is used for modulating the travelling speed and the density of the electron beam to form an initial electron string, the drift segment is arranged between the first slow wave structure and the electron beam collection pole and is used for clustering the initial electron string to form a modulated electro string, the second slow wave structure is arranged between the drift segment and the electron beam collection pole, the modulated electron string and the second slow wave structure jointly act to generate electromagnetic oscillation, and the frequency of the electromagnetic oscillation is an integer multiple of the modulation frequency during modulation of the electron beam by the first slow wave structure. The coupling strength between a coherent incident field of the modulated electron string and a high-frequency field in the second slow wave structure is higher than that between a non-coherent incident field of the continuous electron beam and the high-frequency field, and thus, the starting oscillation current density of the terahertz source is reduced.

The invention discloses a 75 kW continuous wave magnetron. The 75 kW continuous wave magnetron comprises a positive pole cavity combination (1), a negative pole lead wire combination (2), a water pipe (3) which is connected with the positive pole cavity (1), an output window combination (4) which is connected with the negative pole cavity combination (1), an antenna combination (5) which is fixed on the negative pole cavity combination (1), and an inner pole shoe (6) which is fixed at one end of the positive pole cavity combination (1), wherein the antenna combination (5) is located inside the output window combination (4). The continuous wave magnetron is reasonable in structural design, high in power, high in output efficiency, less in microwave leakage, and high in safety performance. Particularly, due to the fact that a negative pole structure of a fan-shaped resonator system structure with high characteristic impedance is adopted and an n-shaped water line cooling structure is adopted on a negative pole, heat dissipation effect is better, light striking probability is less, working is stable, structure is novel, and the magnetron is suitable for being used in a high-power microwave heating device in industries.

The invention discloses a millimeter wave band traveling wave tube output window and a manufacturing method thereof, belonging to the field of microwave vacuum electron devices. The output window comprises a core bar-shaped inner conductor and cylindrical dielectric ceramic components arranged at the periphery and connected with each other by welding, wherein the components are then welded with outermost cylindrical outer conductors. The manufacturing method is as follows: utilizing electromagnetic simulation software to carry out stimulation experiment adjustment on the output window; selecting the inner conductor, the dielectric ceramics and the outer conductors; plating nickel on the inner conductor and the outer conductors; metalizing the alumina ceramics; assembling the inner conductor, the ceramics and the outer conductors on a corresponding welding jig and carrying out welding in a hydrogen furnace according to the corresponding process specification; detecting the vacuum air tightness of the output window; and testing the standing-wave ratio of the output window, wherein the requirement that the standing-wave ratio is less than 1.5 is satisfied in the working band. The structure of the output window has good vacuum air tightness, and the output window can bear direct current power transmission of 80W and can be widely used for the millimeter wave band low-frequency spiral traveling wave tubes.

The invention provides a band-shaped beam klystron multi-gap cavity output apparatus. The apparatus comprises an upper cover plate, a lower cover plate, a coupling transition sheet and an output waveguide, wherein the upper cover plate and the lower cover plate are buckled for coupling, and a multi-gap output cavity is formed between the upper cover plate and the lower cover plate; the coupling transition sheet has one end disposed in a bulge structure and the other end extending out of the bulge structure through a square hole formed at the side surface of the upper cover plate and the lower cover plate, and the middle of the coupling transition sheet is provided with a transition hole whose one end is connected with the bulge structure; and the output waveguide is connected with the other end of the transition hole in the coupling transition sheet for outputting microwaves in the multi-gap output cavity to an external load. The apparatus provided by the invention improves the field coupling of interacting gaps and can adjust cavity frequency.

The invention provides a high-order-mode coaxial output cavity which has a broad spectrum spurious-mode inhibition function and consists of a high-order-mode coaxial resonant cavity, a spurious-mode inhibition device and an output waveguide. The spurious-mode inhibition device comprises an attenuation cavity contained with a microwave absorption material, a radial waveguide enabling all modes including a working mode in the high-order-mode coaxial resonant cavity to be transmitted outwards and enabling the residual modes except the working mode, namely non-working modes to be transmitted to the attenuation cavity, and a choke flow waveguide producing equivalent short circuit to the working mode at the connecting position of the choke flow waveguide and the radial waveguide so as to limit the working mode in the high-order-mode coaxial resonant cavity and enabling the working mode not to be transmitted into the attenuation cavity. Therefore, the working mode is not influenced while clutter-spectrum levels can be reduced, and a speed regulating tube can stably operate in the working mode.

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 are supported by diamond dielectric support rods. Diamond is the best possible thermal conductor, and it can be bonded to the helix. The electron beam is transmitted, not through the center of the helix, but around the outside. In some configurations the RF power produced may be radiated directly from the slow wave circuit. The method of fabrication, which is applicable above 60 GHz, is compatible with mass production.

The invention discloses an output device of a TE1,1 mode gyro traveling wave tube, and belongs to the technical field of power sources in the high-power millimeter wave technology. The output device comprises a circular-elliptical waveguide transition section, an elliptical waveguide section, an elliptical-circular waveguide transition section and a circular waveguide radiator connected in sequence, wherein the inner walls of the four are in smooth transition and the waveguide center lines are coaxial. The output device can directly output Gaussian beams, does not need an external over-mode waveguide mode converter, is beneficial to realizing broadband, high-efficiency and high-power operation of the high-power millimeter wave gyro traveling wave tube, is also beneficial to compactness and miniaturization of a high-power millimeter wave application system, can effectively output linearly polarized Gaussian beams, and does not need an external mode converter, a circular polarizer and other devices any more.

The invention relates to a 0.34 THz travelling wave tube, and belongs to the field of microwave vacuum electronic devices. The 0.34 THz travelling wave tube comprises a slow wave structure with the waveguide wide-edge length a of 0.5 mm+ / -0.02 mm, the waveguide narrow-edge length b of 0.08 mm+ / -0.02 mm, the half-cycle length p of 0.14 mm+ / -0.02mm, the straight waveguide length h of 0.21 mm+ / -0.02 mm, the bending waveguide radius ravg of 0.02 mm+ / -0.01 mm, and the electron beam channel radius rt of 0.09 mm+ / -0.01 mm, and a microwave window with the window plate thickness of 0.1 mm+ / -0.02 mm, the diameter of 1.8 mm+ / -0.05 mm, the cylindrical resonant cavity diameter of 1.2 mm+ / -0.05 mm, and the height of 0.1 mm+ / -0.05 mm. According to the 0.34 THz travelling wave tube, the bandwidth reaches 2 GHz, the gain reaches 20 dB, the output power reaches 130 mW, the requirement of a 0.34 THz frequency-band terahertz application system is met, and the 0.34 THz travelling wave tube can be applied to the terahertz radar and the terahertz communication system.