144 results about "Radiation zone" patented technology

A method for reacting one or more hydrocarbons by steam cracking including conducting one or more input streams containing the one or more hydrocarbons, obtaining one or more product streams, through one or more radiation zones of one or more cracker furnaces, in which the one or more radiation zones are heated by firing heating gas with combustion air, in which at least a portion of the combustion air is subjected to combustion air preheating in which steam is produced from feed water, and in which the feed water is subjected to feed water preheating in one or more convection zones of the one or more cracker furnaces. The combustion air preheating is carried out at least in part and / or at least temporarily using heat withdrawn from at least part of the feed water upstream of the feed water preheating.

A differential feed waveguide slot antenna array disclosed by the present invention comprises a radiation layer and a feed layer, the radiation layer is provided with a first antenna radiation slot group and a second antenna radiation slot group, the feed layer comprises a one-to-two power divider, a first feed line and a second feed line, one end of the first feed line is connected with a first output end of the one-to-two power divider, and the other end of the first feed line is connected with a second output end of the one-to-two power divider. One end of the second feeder line is connected with the second output end of the one-to-two power divider, the other end of the first feeder line is connected with the other end of the second feeder line, and the length difference X exists between the first feeder line and the second feeder line, so that the phase difference between a first signal passing through the first feeder line and a second signal passing through the second feeder line is 180 degrees; the first antenna radiation slot group is arranged corresponding to the first feeder line, and the second antenna radiation slot group is arranged corresponding to the second feeder line. The antenna has the advantages of wide working bandwidth, low side lobe and low cost.

A radiative cooling device that is in a state in which a radiative surface is colored is provided. A radiative cooling device CP includes an infrared radiative layer A that radiates infrared light IR from a radiative surface H, a light reflective layer B that is disposed on the side opposite to the radiative surface H with respect to the infrared radiative layer A, and a color portion X. The infrared radiative layer A is a resin material layer J that has a thickness adjusted so as to emit a heat radiation energy greater than an absorbed solar energy in a wavelength range from 8 μm to 14 μm, and the color portion X contains a colorant that absorbs light in the visible range.

The invention provides an ultra-wide-band wide-scanning-angle planar tight coupling array antenna. The antenna comprises a plurality of antenna units which are periodically arranged; the antenna unit comprises a coating layer, a radiation layer, a wave absorbing layer and a metal floor which are sequentially arranged from top to bottom and are not in contact; the radiation layer comprises a radiation layer dielectric plate, and a radiation patch and a coupling patch which are printed on the upper surface and the lower surface of the radiation layer dielectric plate; the radiation patch adopts an interdigital dual-polarization dipole structure; the coupling patch consists of a circular metal patch and four quasi-isosceles trapezoid metal patches which are spliced on the circumference of the circular metal patch and are uniformly distributed; the wave-absorbing layer comprises a wave-absorbing layer dielectric plate and an annular thin-film resistor printed on the upper surface of the wave-absorbing layer dielectric plate. The coupling patch can increase the coupling capacitance between the dipoles so as to offset inductive reactance introduced by the floor and suppress resonance points in a frequency band, and the thin-film resistor in the wave absorbing layer can convert energy of incident electromagnetic waves into heat energy, so that the energy is dissipated and attenuated, the resonance points in the frequency band are suppressed, and the working bandwidth is widened.

The invention provides a 45-degree polarized waveguide slot antenna, and the antenna comprises a plurality of metal layers which are seamlessly attached, and the metal layers are a radiation layer, a slot layer, and a feed waveguide layer. The radiation layer is provided with a pair of C-shaped metal walls, and the bottom of the radiation layer is provided with a plurality of horn mouths. The slit layer is provided with a plurality of inclined slits which are arranged and distributed in parallel, the included angle between the longitudinal center line of each inclined slit and the longitudinal center line of the slit layer is 45 degrees, and the plurality of inclined slits correspond to the plurality of horn mouths one by one; the feed waveguide layer is provided with a ridge waveguide resonant cavity, the inner side of the cavity side wall is provided with a plurality of convex blocks, and the center of the bottom of the feed waveguide layer is provided with periodic concave-convex ridges; one end of the narrow side of the cavity side wall is provided with a rectangular feed waveguide port. Through the antenna with the multilayer metallization structure, the radiation performance of large broadband, high gain, low side lobe and low cross polarization is realized, and the antenna can be widely applied to communication systems such as millimeter wave satellites, radars and the like.

The invention belongs to the technical field of antennas, and relates to a circularly polarized antenna array, which comprises four antennas distributed in an array, the antenna comprises a first radiation layer, a first dielectric layer, a second radiation layer, a second dielectric layer and a floor layer which are sequentially stacked from top to bottom, the first radiation layer comprises two spiral radiation arms which are arranged at an interval and are distributed in a central symmetry manner so as to form a circularly polarized spiral antenna; the second radiation layer and the first radiation layer are connected and have the same structure; the first radiation layer and the second radiation layer are connected with the feed structure; the radiation arms comprise a first radiation arm and a second radiation arm; the initial ends of the first radiation arm and the second radiation arm are arranged in the middle of the first dielectric layer, the terminal of the first radiation arm is arranged in the middle of the antenna array, and the terminal of the second radiation arm is arranged at the corner of the antenna array. According to the invention, ultra wide band, high gain, circular polarization and interference resistance can be realized at the same time, the axial ratio performance is good, and miniaturization is facilitated.

Device for laser cladding, the device comprising: A carrier unit for a brake disc (50) to be coated for a motor vehicle, wherein the carrier unit has a movement unit for rotating the brake disc (50); A laser beam unit for providing a first laser beam (L1) and a second laser beam (L2) for generating a first irradiation zone (20) by means of the first laser beam (L1) and a second irradiation zone (22) by means of the second laser beam (L2) on a surface of the brake disc (50), wherein the device is arranged such that the second irradiation zone (22) precedes or follows the first irradiation zone (20) during operation of the device along a processing direction (40); A feeding unit for feeding a powdered additive material (P) into the first irradiation zone (20), wherein the additive material can be fed to the first irradiation zone (20) in such a way that it enters the first laser beam (L1) and is thereby heated before it hits the surface of the brake disc (50); Where the second irradiation zone (22) is offset orthogonally to the processing direction (40) relative to the first irradiation zone (20).

The invention provides a millimeter wave antenna, a millimeter wave base station antenna and a millimeter wave isolation structure. The antenna comprises a parasitic radiation layer, a main radiation layer and a grounding layer which are sequentially stacked from top to bottom, the parasitic patch on the parasitic radiation layer and the main radiation patch on the main radiation layer can respectively form resonance points and are coupled, so that the bandwidth expansion of the antenna is realized; the upper surface of the grounding layer is provided with a coupling structure, and the lower surface is provided with a feed structure. The feed structure and the coupling structure achieve a dual-polarization mode through two vertically-arranged microstrip gaps, feed signals can be transmitted and coupled to the main radiation layer more effectively, and the wide-beam antenna performance is achieved. Therefore, the antenna has good radiation efficiency in the frequency bands of N257, N258 and N261, and better meets the application requirements of 5G millimeter wave base station antennas. Meanwhile, excellent isolation performance is also realized; in addition, the base station antenna has the advantages of being simple in design and process.

The invention relates to the technical field of antennas, and discloses an unmanned aerial vehicle directional detection antenna and unmanned aerial vehicle detection device.The unmanned aerial vehicle directional detection antenna comprises a secondary radiation layer provided with a first substrate and a main radiation layer provided with a second substrate, and the first substrate is provided with a first radiation patch array and a second radiation patch array; the first radiation patch array comprises 2n first radiation patches used for receiving electromagnetic wave signals of a first frequency f1, the second radiation patch array comprises m second radiation patches used for receiving electromagnetic wave signals of a second frequency f2, and the second radiation patches are arranged in gaps of the first radiation patch array at intervals; the second substrate and the first substrate are stacked at intervals along the first direction and are fixedly connected, a third radiation patch is arranged at a position, corresponding to the first radiation patch, on the second substrate, and a fourth radiation patch is arranged at a position, corresponding to the second radiation patch, on the second substrate. The size of the directional detection antenna of the unmanned aerial vehicle is reduced.

The invention provides an antenna structure and electronic equipment, and belongs to the technical field of antennas. The antenna structure comprises a support member, a radiation layer and a reflection layer. The support part comprises a first surface and a second surface which are located in the first direction. At least one of the radiation layer and the reflection layer is of a laser direct structuring structure, the radiation layer is located on the first surface, and the reflection layer is located on the second surface; the orthographic projection of the radiation layer in the first direction at least partially coincides with the orthographic projection of the reflection layer in the first direction. According to the antenna structure, the radiation layer and the reflection layer are located on the two surfaces of the support part respectively, the antenna structure has the advantages of being small in size, low in profile, wide in frequency band and the like, and the working bandwidth and the radiation efficiency can be remarkably improved.

The invention discloses a heat collection and heat removal integrated energy-saving enclosure structure and a heat collection and heat removal adjusting method thereof. In the structure, a roof subsystem comprises a roof radiation layer, a roof structure layer, a cavity located between the roof radiation layer and the roof structure layer, and a communicating device used for achieving air circulation and isolation between the indoor space and the cavity; the roof radiation layer comprises a plurality of inclined and side-by-side double-side shutter radiation units, each double-side shutter radiation unit comprises a condensation pipe, a central pipe rotationally sleeving the condensation pipe and shutter plates arranged on the two sides of the central pipe, one side of each shutter plate is provided with a sky radiation cooling material, and the other side of each shutter plate is provided with a solar heat collection material; the wall subsystem comprises a wall and evaporation pipes arranged in the wall, the upper ends of the evaporation pipes are in butt joint with the lower ends of the corresponding condensation pipes, and the evaporation pipes are used for storing heat-conducting media capable of absorbing heat and evaporating. Natural energy can be fully utilized in summer and winter to meet the cold and hot requirements, and the complexity and cost of the system are reduced.

The invention discloses a method for improving bandwidth and efficiency of a 1bit circular polarization transmission array antenna, which comprises the following steps of: rotating a radiation patch of a 1bit circular polarization phase coding transmission unit by 90 degrees to form a first-class unit which is orthogonally placed with a radiation layer of an original transmission unit; the original transmission units and the orthogonal units are arranged in a crossed and staggered manner to form 2 * 2 structural blocks; exchanging the positions of the original units and the orthogonal units in the 2 * 2 structural blocks to form 2 * 2 replacement structural blocks; the original structural blocks and the replacement structural blocks are arranged in a crossed and staggered mode to form 4 * 4 unit supercells; the radiation layer distribution pattern of the 4 * 4 unit supercell is approximately that four 2 * 2 structural blocks rotate in sequence at angles of 0 degree, 90 degrees, 180 degrees and 270 degrees; and constructing a 1bit circular polarization transmission array antenna by 4 * 4 unit supercells. According to the invention, the strong relevance of main polarization and cross polarization phase regulation in a uniform array is relieved, and the axial ratio bandwidth of a circular polarization beam and the aperture efficiency of an array antenna are improved.

The invention provides a cloud atmosphere high-fidelity vector radiation simulation method based on physical constraints. The method comprises the following steps: A1, generating cloud layer micro-physical parameters by a WRF model; a2, integrating simulation parameters generated in the step A1, and inputting the simulation parameters into an MYSTIC model for three-dimensional radiation transfer simulation; a3, constructing a PC-GAN (U-Net + + + differentiable radiation layer + double-branch discriminator) physical constraint generative adversarial correction network, and defining adversarial loss, physical loss and KL divergence loss; a4, simulation data are input into PC-GAN, CALIPSO, PLODER3 and other actual measurement data are compared with the simulation data to calculate loss, physical loss is fed back, and cloud micro physical parameters are iteratively optimized until RMSElt is radiated; 5%; a5, backfilling the cloud layer micro-physical parameters corrected in the step A4, carrying out MYSTIC model radiation transfer simulation again, and carrying out satellite / foundation verification; and A6, outputting high-fidelity radiation simulation data. The method can be widely applied to meteorological satellite data verification, climate model development, cloud characteristic inversion and remote sensor design, and has the technical advantages of high precision and high efficiency.

The invention relates to the technical field of electrothermal film preparation, in particular to an electrothermal film energy-saving heating method and system based on far infrared radiation, and the method comprises the steps: obtaining a plurality of historical electrothermal films and a current slurry feature group according to a current slurry component set and a storage electrothermal film set, and obtaining an original solid content data set of the historical electrothermal film set, obtaining a training feature data set based on the current feature parameter set and the original solid content data set, training a neural network by using the training feature data set to obtain a solid content selection model, and inputting the current feature parameter set into the solid content selection model to obtain an optimal solid content. And preparing current coating slurry based on the optimal solid content and the current slurry component set, preparing a coating base material according to the current coating slurry, and heating and drying the coating base material by using a multi-section temperature zone drying furnace to obtain the radiation layer film material. The coating efficiency in the electrothermal film preparation process can be improved, and the energy consumption in the drying process can be reduced.

The present disclosure provides a holographic antenna, a beam control method thereof, a storage medium and an electronic device, and belongs to the technical field of antennas. The present disclosure can solve the problem that the existing antenna structure is complex and the polarization direction is not variable. The holographic antenna comprises a dielectric substrate, a radiation layer and a plurality of switch units. The radiation layer is provided with a plurality of slit openings. The switch units are arranged correspondingly to the slit openings. The holographic antenna further comprises an acquisition unit configured to acquire a target wave and a polarity of the target wave; a construction unit configured to construct a reference wave based on the polarity of the target wave; a calculation unit configured to calculate an interference wave based on the reference wave and the target wave; a sampling unit configured to obtain an excitation sampling value of each slit opening; and a control unit configured to control the switch units to control the switching state of the slit openings. The present disclosure can realize dynamic reconfiguration of different polarizations by using the holographic principle combined with a slot antenna.

The utility model discloses a waveguide antenna and a radar, and the waveguide antenna comprises a radiation layer which is provided with a first surface, a solder resist part is formed at a preset position of the first surface, and a welding area is formed in the solder resist part; the signal transmission layer and the radiation layer are arranged in a stacked mode in the first direction, the signal transmission layer is provided with a second surface, and a gap space is formed between the second surface and the first surface; the soldering tin layer is arranged in the gap space and provided with a first end and a second end in the first direction, the first end of the soldering tin layer is connected to the welding area, and the second end of the soldering tin layer is connected to the second surface. According to the utility model, the solder resist part is arranged on the radiation layer and is used as a reference mark, and the alignment between the radiation layer and the signal transmission layer can be ensured to be more accurate by accurately controlling the position and the shape of the solder resist part, so that the high-precision positioning requirement of the radiation layer and the signal transmission layer of the waveguide antenna is met.

The invention discloses a wave-absorbing metasurface low-profile wide-angle RCS (radar cross section) reduction tight coupling dipole antenna. The array is composed of a radiation layer, a middle layer, a wave-absorbing metasurface layer and a metal ground layer. The top layer of the radiation layer is a dipole antenna, and the tail ends of radiation arms of the dipole antenna are loaded with coupling patches through metal through holes; the middle layer is a dielectric substrate; the top layer of the wave-absorbing metasurface layer is a pair of symmetrical trident-shaped resistive films loaded with metal through holes, and the bottom layer of the wave-absorbing metasurface layer is a dielectric substrate; the metal ground layer is located at the lowermost layer. According to the invention, the wave-absorbing metasurface is embedded in the tight coupling dipole array antenna to replace a traditional metal ground, so that a low-profile structure is realized. According to the antenna, within the frequency band of 7-14 GHz, the wave absorbing efficiency is higher than 75% when electromagnetic waves are incident at the wide angle of 0-60 degrees, meanwhile, good radiation performance and wide-angle scanning capacity are kept, and the radar cross section is remarkably reduced. The method can be popularized to the low radar cross section design of a traditional antenna, and is suitable for radar and wireless communication systems.

The utility model relates to a substrate processing device and a substrate temperature measurement assembly. The substrate temperature measurement assembly comprises a to-be-measured piece and a temperature measurement device. The to-be-tested piece is used for being placed on a supporting seat of the substrate processing device, and the to-be-tested piece comprises a substrate simulation piece and a radiation layer arranged on the surface of the substrate simulation piece. The temperature measuring device comprises at least one infrared thermometer and is used for acquiring the temperature of a plurality of different positions of the radiation layer. Temperature measurement processing is carried out on the to-be-measured piece through the temperature measurement device, and according to the temperatures of multiple different positions of the to-be-measured piece, the temperatures can be used as a basis for determining whether the temperatures of all parts of the surface of the substrate are uniform or not. Therefore, whether the temperature of the surface of the substrate is uniform or not can be automatically detected in real time without opening the cavity, so that the production efficiency is improved; besides, the radiation layer has high thermal radiation capability, so that the infrared thermometer can accurately sense the temperature of each detection point, the temperature measurement precision is high, and the film deposition quality of the substrate can be further improved.

The application discloses a kind of vehicle-mounted UWB-AOA circular polarization high-precision positioning antenna, it is related to vehicle antenna positioning technical field.The vehicle-mounted UWB-AOA circular polarization high-precision positioning antenna includes: dielectric substrate and radiation layer, and the feed layer below radiation layer, and radiation layer is installed at substrate bottom, it is characterized in that, still include: the one end array of feed layer is close to radiation layer is installed with circular polarization antenna, and vehicle positioning is carried out based on circular polarization antenna, metal shielding layer for isolating external interference is arranged below feed layer, UWB transceiver module is installed below shielding layer, time stamp controller is installed in UWB transceiver module, the present application is positioned based on circular polarization antenna vehicle, to ensure the receiving stability of signal in complex environment, in turn, still can obtain stable and reliable three-dimensional positioning result under complex environment, and then guarantee the high-precision positioning demand of vehicle under dynamic operation condition.

The utility model provides a circularly polarized antenna structure, a wireless communication module and a millimeter wave isolation communication module. The antenna structure comprises a radiation layer, a grounding layer and a microstrip line feed layer which are sequentially stacked from top to bottom. The radiation layer comprises a central circular patch and a parasitic unit; two linear grooves which do not pass through the circle center are formed in the central circular patch along the diameter of the central circular patch; the parasitic unit is an arc-shaped patch and is arranged on the periphery of the central circular patch, and the circle center of the arc-shaped patch coincides with the circle center of the central circular patch; the extension of the linear groove does not touch the arc-shaped patch; and a feed copper column of the microstrip line feed layer penetrates through each layer and then is connected to the vicinity of the circle center of the radiation layer. According to the utility model, the problem of polarization loss can be overcome, the bandwidth of circular polarization is increased, and the wireless communication transmission quality is significantly improved.

The present disclosure belongs to the technical field of antennas. Provided are a panel antenna and an electronic device, which can solve the problems of existing panel antennas, such as low aperture efficiency, uneven radiation amplitude, difficulty in achieving multi-frequency coverage. The panel antenna in the present disclosure comprises a waveguide structure, a first dielectric substrate, a radiation layer and a plurality of switch units, wherein the radiation layer has a plurality of slit openings; the switch units are arranged so as to correspond to the slit openings on a one-to-one basis, and are configured to control whether the slit openings corresponding thereto are open / closed; the radiation layer is divided into a middle region and a peripheral region; and the slit openings located in the middle region among the plurality of slit openings are divided into a plurality of groups, each group of said slit openings comprises at least a plurality of first slit openings, at least some of the first slit openings located in different groups have different sizes, and the closer a group of slit openings to the centre of the middle region, the larger the size of the first slit openings in said group of slit openings. The panel antenna in the present disclosure has the advantages of high aperture efficiency, multi-frequency coverage and even radiation amplitude.

The invention relates to an antenna structure and a preparation method thereof. The antenna structure comprises a flexible radiation layer; the flexible grounding layer is arranged opposite to the flexible radiation layer; the compressible dielectric layer is located between the flexible radiation layer and the flexible grounding layer, the conductive side of the flexible radiation layer is far away from the compressible dielectric layer, and the conductive side of the flexible grounding layer is far away from the compressible dielectric layer; the SMA connector comprises a base and a first connecting part which are connected with each other, the base is located on the side, away from the compressible dielectric layer, of the flexible grounding layer, and the first connecting part is electrically connected with the flexible radiation layer and the flexible grounding layer. The antenna structure composed of the flexible radiation layer, the grounding layer and the compressible dielectric layer can be freely bent and compressed to deform.

The application belongs to the technical field of antennas and relates to a cross-dipole antenna which comprises a metasurface layer, a radiation layer and a ground layer; the metasurface layer is connected with the ground layer and forms a containing space between the metasurface layer and the ground layer; the radiation layer is arranged in the containing space, is connected with the ground layer and is arranged in a spaced mode with the metasurface layer; the radiation layer comprises two pairs of cross-dipoles; two feeding structures are arranged on the ground layer and are connected with the two pairs of cross-dipoles respectively; the radiation layer comprises a dielectric plate and four radiation patches which are arranged in a spaced center-symmetrical mode about the center of the dielectric plate; the dielectric plate and the radiation patches are square structures, one side of the radiation patch is parallel to one side of the dielectric plate; two radiation patches are adjacently arranged on the top surface of the dielectric plate, and the other two radiation patches are adjacently arranged on the bottom surface of the dielectric plate; two opposite radiation patches are connected to serve as a dipole. The application can reduce the profile of the antenna.

The invention provides an antenna unit and antenna equipment, belongs to the technical field of antennas, and aims to enable a transparent antenna to have a filtering effect. The radiation layer is located on one side of the feed structure and comprises a first substrate layer and a radiation patch located on the side, away from the feed structure, of the first substrate layer; wherein the first substrate layer is a transparent substrate layer; the filtering structure and the radiation patch are arranged in the thickness direction of the radiation layer, and a gap is formed between the filtering structure and the radiation patch in the thickness direction of the radiation layer; wherein the filtering structure comprises at least one annular electrode pattern, and the orthographic projection of the annular electrode pattern on the first substrate layer is at least partially overlapped with the orthographic projection of the radiation patch on the first substrate layer.

An array antenna (10), comprising: a feed source layer (1), which comprises a feed network (11) having an input port (12) and a plurality of output ports (13); an energy re-allocation layer (2), which has a plurality of allocation regions, wherein the energy re-allocation layer (2) is used for re-allocating near-field energy at the output ports (13) in the plurality of allocation regions; and a radiation layer (3), which comprises a plurality of radiation units (31) corresponding to the plurality of output ports (13) on a one-to-one basis. In the embodiments of the present disclosure, the near-field energy at the output ports (13) is re-allocated in the plurality of allocation regions by means of the energy re-allocation layer (2), thereby ensuring that the distribution of the re-allocated near-field energy meets requirements; and then the re-allocated near-field energy at the output ports (13) is radiated by means of the radiation units (31) of the radiation layer (3), thereby ensuring the radiation directivity of the radiation units (31), and ensuring the radiation characteristics of the array antenna (10). (FIG. 1)

The invention discloses an all-metal ultra-wideband CTS antenna, comprising a radiation layer, a line source generator layer, a back cavity power divider layer and a planar single-ridge power divider layer which are arranged in order from top to bottom, the line source generator layer is directly connected to the CTS radiation slot of the radiation layer, the back cavity power divider layer and the planar single-ridge power divider are combined to form a broadband multi-channel power divider to excite the line source generator layer, the quasi-TEM wave generated by the line source generator layer is directly fed to the CTS radiation slot of the radiation layer, the 1-to-4 single-ridge power divider in the planar single-ridge power divider layer is realized by sequentially cascading a plurality of H-plane single-ridge T-junctions, when the number of CTS radiation slots in the radiation layer increases, only the planar single-ridge power divider layer, the back cavity power divider layer and the line source generator layer need to be horizontally extended to form a broadband feeding network, and the overall height of the CTS antenna is not increased; the advantages are that the efficiency is significantly improved, the bandwidth is increased, the scalability is greatly improved, the structure is more compact, and the manufacturing and assembly are easy.

The invention belongs to the field of navigation and positioning, and aims to solve the problems that the height of an antenna is increased due to the fact that the bandwidth is increased in an existing lamination-based method, and the gain of the antenna is rapidly reduced due to frequency deviation caused by the fact that gaps between lamination layers of the antenna are changed under the condition that high and low temperatures are changed violently. The invention provides a microstrip antenna device, navigation equipment and a manufacturing method. The microstrip antenna device comprises a base, a feed network and a radiation sheet, the feed network and the radiation sheet are stacked, the feed network is connected with the radiation sheet, and the radiation sheet is fixed on the base; the radiation sheet is provided with a first surface deviating from the feed network, the first surface is provided with a radiation layer, the radiation layer comprises a plurality of radiation sub-layers, and at least part of the radiation sub-layers are distributed around the center of the first surface at intervals; wherein at least one radiation sub-layer is electrically connected with the feed network. The bandwidth of the antenna can be ensured, the height of the antenna can be reduced, and the performance of the antenna is improved.

The invention discloses an array antenna which comprises a radiation layer, and a plurality of radiation slots are formed in the radiation layer. The cavity layer is arranged below the radiation layer, and the cavity layer comprises at least one coupling slot; and the feed layer is arranged below the cavity layer, a feed network is arranged on the feed layer, and the feed network comprises at least one ridge gap waveguide. According to the array antenna, the gap waveguide transmission line which is low in loss and does not need electric contact is used as the feed network of the antenna, the high-order mode resonant cavity can provide higher flexibility, a more compact structure and lower loss, the top layer is the loaded radiation gap of the rectangular groove, and the antenna is more compact in structure. The design of the groove can reduce the loss of energy at the gap and the leakage of non-radiation energy, and realizes the performance improvement of high gain, low loss and wide band of the miniaturized plane millimeter wave array antenna.

The invention discloses an MEMS infrared light source based on in-situ confinement growth processing and a preparation method thereof, and the preparation method comprises the steps: cleaning a silicon substrate, and carrying out the deposition of a supporting layer and a back supporting layer on the upper surface and the lower surface of the silicon substrate respectively; processing a heating electrode, a heating plane electrode, a growth electrode and a growth plane electrode on the supporting layer on the upper surface of the silicon substrate; etching the upper surface or the lower surface of the silicon substrate to form a substrate cavity; and growing a metal black radiation layer on the surface of the growth electrode through in-situ confinement growth processing. According to the preparation method, the metal black radiation layer is obtained based on in-situ confinement growth processing, so that the metal black radiation layer and the growth electrode are reliably combined; the surface emissivity and radiation efficiency of the MEMS light source are improved, the processing flow of the light source chip is simplified, and the processing cost of integrated processing of the infrared light source device and the black-body-like coating is greatly reduced.

The present invention discloses a radiofrequency ablation electrode needle with adjustable radiation zone length, comprising a handle, a needle head, a needle body, and a tail spring; the needle head is made of metal material and is sleeved on the front end of the needle body; the needle body comprises an electrode radiating end, a non-metallic coating, and a tail spring; the expansion and contraction of the tail spring drives the needle body to move inside the needle head, and the length of the electrode radiating end relative to the needle head changes accordingly; a distance measuring sensor is provided in the handle. The present invention also discloses a radiofrequency ablation electrode system with adjustable radiation zone length, and a method for implementing a radiofrequency ablation electrode system with adjustable radiation zone length. The host-side system controls the movement of the needle body through the tail spring to achieve the adjustable function of the single-electrode precise ablation range, and the distance measuring sensor transmits the measured length information to the host-side system, which matches the length value to the optimal output mode to achieve an adjustable and precise ablation clinical effect.