10 results about "Coaxial cavity" patented technology

The invention relates to a radio frequency resonant cavity based on a short-circuit sliding block. The radio frequency resonant cavity comprises an input coaxial transmission line; the connector is connected with the input coaxial transmission line; the first output coaxial transmission line and the second output coaxial transmission line are connected with the connector. The first shifting mechanism is arranged on the first output coaxial transmission line, and the second shifting mechanism is arranged on the second output coaxial transmission line; each of the first output coaxial transmission line and the second output coaxial transmission line comprises an inner conductor, a short-circuit sliding block and an outer conductor, the outer conductor coaxially sleeves the inner conductor, a coaxial cavity is formed between the outer conductor and the inner conductor in a matching manner, and the short-circuit sliding block is connected with the first displacement mechanism and the second displacement mechanism; the short-circuit sliding block is movably arranged in the coaxial cavity. According to the ion cyclotron wave power transmission system, the effect of obtaining large voltage by means of small power is achieved, possible sparking points can be detected under the working condition of large voltage, then measures are taken in advance to prevent the sparking phenomenon, and stable operation of the ion cyclotron wave power transmission system is guaranteed.

The invention relates to an integrated nursing device for eliminating thrombus in a PICC (Peripherally Inserted Central Catheter) by ultrasonic waves, which belongs to the technical field of medical instruments and comprises a handheld host and a disposable treatment head. A venturi negative pressure generating unit and a flushing fluid power unit are integrated in the handheld host. The disposable treatment head comprises a multi-section flexible connection structure capable of self-adapting to bending of the catheter, a miniature ultrasonic suppository breaking unit capable of achieving cross interference focusing based on a single crystal wafer and a reflection cavity, and a multi-layer coaxial cavity structure capable of achieving synchronous suction and flushing. When the device works, ultrasonic energy directly acts on thrombus in a catheter to efficiently crush the thrombus, meanwhile, fragments are removed in time through negative pressure generated by the Venturi effect, and visual state indication is provided through the mechanical feedback unit. The problems that a traditional method is low in efficiency, complex in operation and asynchronous in fragment removal are solved, and safe, efficient and convenient integrated catheter thrombus removal is achieved.

A remote sensing satellite data transmission subsystem based on multi-stage noise suppression comprises a data transmission integrated intelligent terminal, a multi-stage high-suppression-performance channel filter, an adjustable suppression degree phased array antenna, power supply and control equipment; the signal output by the data transmission integrated intelligent terminal is transmitted through the adjustable suppression degree phased array antenna after being filtered by the multi-stage high-suppression-performance channel filter; the power supply and control equipment is used for power supply and data transmission with the data transmission integrated intelligent terminal and the adjustable suppression degree phased array antenna respectively; the multi-stage high-suppression-performance channel filter suppresses the sensitive frequency band of the data transmission subsystem through its own multi-stage coaxial cavity and tuning screw; the adjustable suppression degree phased array antenna suppresses the sensitive frequency band of the data transmission subsystem by setting resonators in its own filtering module.

The invention discloses a box type topology coaxial cavity filter based on a coupling branch knot dual-mode coaxial resonator. The box type topology coaxial cavity filter comprises a metal cavity, a cover plate, two metal resonance rods and a metal dual-mode resonance coupling branch knot, the metal cavity is in a cuboid geometrical shape, and the cover plate is located at the top of the metal cavity, so that the metal cavity becomes a closed space; the size of the filter cavity, the size of the resonance rod and the size of the coupling branch depends on specific frequency requirements; the metal dual-mode resonant coupling branch knot is composed of a plurality of branch knots which are completely in mirror symmetry left and right, each side branch knot comprises first to fifth branch knots, and the first branch knot is of a block-shaped structure, is a common basic supporting part of the symmetrical branch knots and is directly connected with the metal resonant cavity to form a short-circuit end; the second branch knot is an arc convex surface; the third branch is of a blocky structure; and the fifth branch knot is connected above the fourth branch knot, is of a regular block-shaped structure, is kept in an equal-width vertical direction, and is provided with a gap with the metal resonant cavity to form an open circuit end.

The invention discloses a compact X-waveband end-fed broadband mode conversion device, which comprises a waveguide cavity and a coaxial cavity which are made of metal materials and are fixedly connected through four hidden screws B uniformly distributed on the wide edge of the waveguide in the horizontal direction, a rectangular waveguide channel is arranged in the waveguide cavity and is used for outputting TEmode electromagnetic waves; the coaxial cavity is used for inputting TEM mode signals and realizing broadband impedance matching through an internal coupling structure. The size of the whole machine can be compressed to be within L1, the relative bandwidth larger than or equal to 35% is obtained within the frequency band of 8-12 GHz, the full-frequency-band voltage standing-wave ratio is smaller than or equal to 1.15, and the dual requirements of a solid-state transmitter for miniaturization and broadband matching are met.

The embodiment of the invention discloses a thin film feedback throttler, a throttling method and a related device. The thin film feedback throttler comprises a multi-layer box body, a first thin film, a second thin film and an annular throttling groove formed in the surface of the multi-layer box body. Wherein a coaxial cavity is formed in the multi-layer box body, the first thin film and the second thin film are sequentially arranged in the coaxial cavity in the axial direction, and the coaxial cavity is divided into at least three independent cavities; the annular throttling groove is communicated with the coaxial cavity to form a throttling structure, and the first thin film and the second thin film are matched with the throttling tables at the corresponding positions to form a thin film feedback structure. Therefore, the two thin film feedback throttlers are connected in series to realize the refinement of regulating and controlling the flow of the oil cavity, the sensitive regulation and control of the throttling flow by the simultaneous deformation of the double thin films when the external load changes are realized, meanwhile, the excessive deformation of the thin films is also avoided, and the throttling performance is effectively improved.

The application belongs to the technical field of Raman spectrum analysis, and particularly relates to an optical flow Raman sensing chip based on a SERS substrate and a preparation method thereof. The optical flow Raman sensing chip comprises a first PDMS layer, a silicon-based optical waveguide layer and a second PDMS layer, wherein the silicon-based optical waveguide layer is arranged on the top surface of the first PDMS layer, the silicon-based optical waveguide layer has a top surface and two side surfaces, the second PDMS layer is arranged on the top surface and the side surfaces of the silicon-based optical waveguide layer, the surface of the side surface of the second PDMS layer facing the silicon-based optical waveguide layer is provided with a near-coaxial cavity, and the arc-shaped inner wall of the near-coaxial cavity is provided with a reflecting film. The target object solution is specifically combined with the SERS composite layer through the microfluidic channel, the SERS composite layer loaded with the target object generates Raman laser under the excitation of pump light, and the Raman laser is output after enhancement under the synergistic effect of the arc-shaped inner wall and the reflecting film. The application significantly improves the collection efficiency of the Raman signal through the multi-dimensional coupling enhancement effect of the cavity structure.

The application discloses a black quartz rotor cover plate positioning and carrying device and method, and belongs to the technical field of semiconductor equipment. The black quartz rotor cover plate positioning and carrying device comprises a cross-shaped support. First positioning components are arranged below each end of the support. The first positioning components are used for being inserted between the black quartz rotor cover plate and a chamber. Two or more second positioning components are arranged below the support. The second positioning components are used for being inserted into black quartz rotor cover plate positioning holes. Locking components are arranged at each end of the support. The locking components are used for cooperating with the first positioning components to clamp and release the black quartz rotor cover plate. The cross-shaped support, the first positioning components, the second positioning components and the locking components are cooperated to realize accurate positioning in the radial direction, the angular direction and the axial direction at one time, so that the cover plate is coaxial with the chamber, the airflow field and the temperature field of the chamber are uniform, and process repeatability and film uniformity are significantly improved.

The invention discloses a black quartz rotor cover plate positioning and carrying device and method, and belongs to the technical field of semiconductor equipment.The black quartz rotor cover plate positioning and carrying device comprises a support arranged in a cross shape, and a first positioning assembly is arranged below each end of the support; the first positioning assembly is used for being inserted between the black quartz rotor cover plate and the cavity, two or more than two second positioning assemblies are arranged below the support, the second positioning assemblies are used for being inserted into positioning holes of the black quartz rotor cover plate, each end of the support is provided with a locking assembly, and the locking assemblies are used for being matched with the first positioning assembly to clamp / loosen the black quartz rotor cover plate. Through cooperation of the cross-shaped support, the first positioning assembly, the second positioning assembly and the locking assembly, accurate positioning in the radial direction, the angular direction and the axial direction is completed at a time, it is ensured that the cover plate and the cavity are coaxial, the airflow field and the temperature field of the cavity are uniform, and the process repeatability and the film forming uniformity are remarkably improved.

The application relates to a short-circuit slider-based radio frequency resonant cavity, which comprises an input coaxial transmission line; a connector connected with the input coaxial transmission line; a first output coaxial transmission line and a second output coaxial transmission line, both of which are connected with the connector; a first displacement mechanism arranged on the first output coaxial transmission line and a second displacement mechanism arranged on the second output coaxial transmission line; the first output coaxial transmission line and the second output coaxial transmission line both comprise an inner conductor, a short-circuit slider and an outer conductor, the outer conductor is coaxially sleeved outside the inner conductor, a coaxial cavity is formed between the outer conductor and the inner conductor, the short-circuit slider is connected with the first displacement mechanism and the second displacement mechanism, and the short-circuit slider is movably arranged in the coaxial cavity. The effect of obtaining a large voltage by means of a small power is realized, the possible sparking points can be detected under the working condition of a large voltage, and then measures are taken in advance to prevent the sparking phenomenon from occurring, so that the stable operation of an ion cyclotron wave power transmission system is ensured.