529 results about "Wave transmission" patented technology

The invention relates to a self-adaptive frequency optimization system in radio and television microwave transmission, and the system comprises an initial audio collection and processing module which collects an audio signal of a current frequency channel in real time, and generates a first data set; the conversion audio acquisition processing module synchronously acquires a target channel signal according to the frequency switching signal, and calculates the loudness offset between two channels; a feature extraction module extracts frequency domain energy distribution feature vectors of the first data set and the second data set; the model construction module constructs a dynamic gain compensation model and generates a compensation value of a target channel; the tone quality compensation module performs smoothing processing on the compensation value to generate an optimized third data set; and the audio optimization module updates model parameters, dynamically adjusts a frequency domain analysis strategy, and outputs low-delay and high-stability radio and television transmission signals. According to the invention, the problems of high switching delay and degraded tone quality caused by static configuration in a traditional scheme are solved, and the transmission efficiency and user experience in a complex electromagnetic environment are remarkably improved through modular dynamic calibration and compensation.

The invention relates to the technical field of power systems, and discloses a power distribution network fault positioning method, device and equipment and a medium, and the method comprises the steps: synchronously collecting fault traveling wave data through a transformer area intelligent terminal and a feeder terminal disposed in a power distribution network; dynamically calculating traveling wave transmission parameters based on the topological information and the real-time operation parameters of the power distribution network; performing feature extraction and fusion processing on fault traveling wave data acquired by the transformer area intelligent terminal and the feeder terminal to generate a joint feature matrix; based on the joint feature matrix and the traveling wave transmission parameters, cooperative verification is carried out through the single-end positioning information and the double-end positioning information, and a fault section is determined; and performing fault type identification on the fault section by using the intelligent classification model, and performing consistency verification according to an obtained fault type identification result and the fault section to generate a fault diagnosis result. According to the invention, accurate positioning of the power distribution network fault can be realized, and the problems of positioning blind areas, high cost and easy misjudgment in the prior art are solved.

The invention discloses a phased-array antenna, the phased-array antenna comprises a plurality of antenna module units, each antenna module unit comprises a PCB and an integrated radome module, and the integrated radome module is arranged on the surface of the PCB; a feed network, a dielectric substrate and an antenna radiation patch are arranged on the PCB, and the PCB is used for realizing feed and partial radiation functions; the integrated antenna housing module comprises a honeycomb support, an antenna patch, a PET film and an antenna housing, the antenna patch is etched on the PET film, the honeycomb support, the PET film and the antenna housing are mutually connected to form an integrated structure, and the integrated antenna housing module is used for realizing wave transmission, bandwidth broadening and impedance matching. According to the phased-array antenna, the use cost of PCB materials is reduced, and the problem that the electrical performance of the phased-array antenna is reduced due to dielectric loss caused by excessive use of PCB materials is solved.

The invention provides a high-reliability high-density three-dimensional integrated multichannel millimeter wave transceiving integrated radio frequency micro module, which adopts three-dimensional ceramic packaging as a packaging body and comprises an amplitude-phase unit and a transceiving unit, and the two units and a cover plate realize electrical vertical interconnection and airtight packaging through three-dimensional stacking. The micro module receives an input signal, the input signal enters a receiving channel after being selected by a switch, an amplitude-limiting low-noise chipset in the micro module carries out amplitude-limiting amplification on the received signal, then the received signal is output to an amplitude-phase multifunctional chip, and the received signal is synthesized and output after amplitude-phase adjustment and amplification. A transmitting input signal is input to the amplitude-phase multifunctional chip after being subjected to power division, is subjected to power amplification after being subjected to amplitude-phase adjustment and amplification, is selected by the transmitting-receiving switch, and is radiated and output through the antenna. A negative electricity protection circuit and a pulse modulation circuit are integrated in the micro module, and pulse control of transmitting and receiving work of the micro module is achieved. The micro module adopts a stepped heat dissipation technology of the chip, the substrate, the functional unit and the micro module, and has very strong practicability.

The invention belongs to the technical field of camouflage materials, and particularly relates to a thermal infrared low-radiation imitation green leaf multilayer film and a preparation method thereof. Comprising a substrate, a long-wave infrared regulation and control layer, a medium-wave infrared regulation and control layer and a green-leaf-imitating hyperspectral regulation and control layer which are arranged in sequence, the long-wave infrared regulation and control layer is stacked on the substrate according to a periodic structure of MHML, the medium-wave infrared regulation and control layer is stacked on the long-wave infrared regulation and control layer according to a periodic structure of (HM) 2L, and the green-leaf-imitating hyperspectral regulation and control layer is stacked on the medium-wave infrared regulation and control layer according to a periodic structure of (LM) 3 (HM) 3 (HL) (HM); h is a high-refractive-index material, M is a medium-refractive-index material, and L is a low-refractive-index material. Aiming at the problems of poor compatibility, large radar wave transmission influence, strict multi-layer film thickness control requirements and the like in the prior art, by optimizing the film system structure, the green-leaf-imitating hyperspectral camouflage characteristic is realized in the visible light-near infrared band, and the low-radiation performance is realized in the thermal infrared dual-band.

The invention discloses an optical fiber signal transmission system and method based on quantum noise encryption, and relates to the technical field of optical fiber communication, and the system comprises a composite modulation transmitting module, a dispersion compensation relay module, a coherent receiving module and a digital signal processor. The composite modulation transmitting module comprises an electro-optical modulator and a quantum noise randomization encoder; the dispersion compensation relay module comprises an adjustable dispersion compensator and a Raman amplifier; the coherent receiving module comprises a local oscillator laser and a 90-degree optical mixer; a digital signal processor includes a clock recovery unit and a maximum likelihood sequence detector. All the modules are sequentially connected and cooperatively work. And the adjustable dispersion compensator dynamically applies reverse dispersion compensation calculated based on a dispersion coefficient and a transmission distance according to the dispersion amount monitored in real time. According to the invention, through technologies of quantum noise encryption, dynamic dispersion compensation, Raman amplification, coherent reception and the like, safe and efficient transmission with single-wave 400Gbps and 100km transmission bit error rate less than or equal to 1 * 10 <-12 > is realized.

A nonreciprocal microwave transmission device includes a substrate, a transducer on a surface of the substrate and configured to reciprocally convert between electrical signals to acoustic waves, a first piezoelectric material configured to generates and transports acoustic waves from a signal applied to the transducer, and a thin film magnetic material configured to couple to acoustic waves through magnetoelastic coupling so as to have non-reciprocal magnetoelastic coupled acoustic wave transport. Transmission of acoustic waves through the thin film magnetic material is in a direction toward the transducer has a first magnitude and transmission of acoustic waves through the thin film magnetic material in a direction away from the transducer has a second magnitude, the first and second magnitude being significantly different.

The invention discloses an ultra-wideband RCS (radar cross section) reduction metasurface with mixed wave absorption and diffuse scattering and a wave-transparent window, and belongs to the technical field of electromagnetic metamaterials. The metasurface adopts a four-layer cascade structure and comprises a first layer of polarization conversion structure, a second layer of 2.5 D lossy structure, a third layer of Jerusalem cross-shaped lossy structure and a fourth layer of frequency selective surface structure. By loading a lumped resistor at a specific position and adopting a metal through hole interconnection technology, dual functions of radar cross section reduction in a 1-20GHz ultra-wideband and low insertion loss wave transmission in a 8-12GHz frequency band are realized. The structure of each layer adopts a highly symmetrical design and has the characteristic of polarization insensitivity, and meanwhile, by optimizing interlayer air gaps and dielectric material selection, the structure compactness is realized on the premise of ensuring the performance. The method has important application value in the aspect of integration of stealth equipment and a communication system.

The invention relates to the technical field of aerospace, in particular to a ceramic 3D printing A sandwich structure with a broadband wave-transparent characteristic. According to the ceramic 3D printing A sandwich structure with the broadband wave transmission characteristic, good compatibility of broadband wave transmission, strength-structure accuracy and reliability is achieved, an obvious effect on broadband wave transmission of 1 GHz to 18 GHz is achieved, the dielectric constant and the tangent loss are in a reduction trend under the same frequency band, excellent stability is shown, and the dielectric constant and the tangent loss are reduced under 10 GHz. The dielectric constant of the ceramic 3D printing A sandwich structure with the broadband wave transmission characteristic is reduced by 40% or above compared with that of a full solid structure, the wave transmission rate is increased by 50% or above, the ceramic 3D printing A sandwich structure has excellent electromagnetic performance and mechanical performance, and support is provided for implementation of reliable service application targets such as diversion, heat protection, wave transmission, bearing and rain erosion resistance of hypersonic aircrafts.

The invention relates to the technical field of vibration and noise reduction, in particular to a two-dimensional spiral acoustic black hole structure which comprises a two-dimensional acoustic black hole configuration I and / or a two-dimensional acoustic black hole configuration II, the two-dimensional acoustic black hole configuration I is formed by rotating a one-dimensional spiral acoustic black hole structure around the long edge of a base of the one-dimensional spiral acoustic black hole structure, and the two-dimensional acoustic black hole configuration II is formed by rotating the one-dimensional spiral acoustic black hole structure around the long edge of the base of the one-dimensional spiral acoustic black hole structure. And the two-dimensional acoustic black hole configuration II is formed by rotating a one-dimensional spiral acoustic black hole structure around the short edge of the base of the one-dimensional spiral acoustic black hole structure. According to the two-dimensional spiral acoustic black hole structure provided by the invention, a one-dimensional spiral acoustic black hole is widened to a two-dimensional spiral acoustic black hole, so that more degrees of freedom are provided, a wave transmission path is allowed to be adjusted more flexibly, and the wave energy capturing capability of the two-dimensional spiral acoustic black hole structure is enhanced.

An apparatus is provided which comprises at least one processor, and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: receive a carrier wave transmission modulated by an ambient internet of things device in an ambient internet of things session, determine whether a received power of the carrier wave transmission is below a predetermined threshold; and in response to determination that the received power is below the predetermined threshold, prepare a notification requesting to control at least one carrier wave transmission characteristic such that the received power is increased, and transmit the notification to a carrier wave provider transmitting the carrier wave transmission or to a session control unit controlling the ambient internet of things session.

The invention provides a CEEMDAN-SSA-based power distribution network fault identification method, and the method comprises the steps: receiving a traveling wave signal of a power distribution network, and carrying out the preprocessing of the traveling wave signal; decomposing the preprocessed traveling wave signal by adopting CEEMDAN to obtain an intrinsic mode function component set, and selecting a high-frequency intrinsic mode function component from the intrinsic mode function component set; performing noise reduction on the high-frequency intrinsic mode function component by using singular spectrum analysis to obtain a pure fault feature signal; analyzing and reconstructing the frequency spectrum characteristics of the pure fault characteristic signal by using fast Fourier transform, and calculating the average frequency spectrum content of the low-frequency-band signal and the amplitude ratio of the high-frequency-band signal according to the frequency spectrum characteristics; and generating a fault identification result of the power distribution network by taking the average frequency spectrum content of the low-frequency-band signal as a main criterion and taking the amplitude proportion of the high-frequency-band signal as an auxiliary criterion according to the fault traveling wave transmission characteristics. Therefore, high-precision power distribution network fault identification can be realized in a complex working condition and a high-noise environment.

The invention belongs to the technical field of frequency selective surface radomes, and particularly relates to a frequency selective surface-based low-frequency wave-transparent and high-frequency reflection device and a satellite radome, which sequentially comprise a first low-pass layer, a first dielectric isolation layer, a first band-stop layer, a second dielectric isolation layer and a second low-pass layer from top to bottom, the first low-pass layer and the second low-pass layer are the same in structure, and each of the first low-pass layer and the second low-pass layer comprises first metal patch patterns which are periodically arranged; each first metal patch pattern is composed of four square ring patterns and a cross-shaped pattern, and the four ends of the cross-shaped pattern are connected with the four square ring patterns respectively; and the first band stop layer comprises second metal patch patterns which are periodically arranged. The novel low-pass layer / band-stop layer pattern multilayer structure is constructed, the effects of ultra-wideband low-frequency wave transmission and high-frequency reflection are achieved under the condition that the thickness is sacrificed, the problem that in-band ultra-wideband wave transmission and out-of-band ultra-wideband reflection are difficult to give consideration to in-band ultra-wideband wave transmission and out-of-band ultra-wideband reflection at the same time in existing frequency selection is effectively solved, and then normal work of a satellite antenna housing is guaranteed.

The utility model provides an on-line monitoring tube expansion prevention protection device for a round tube belt conveyor, and belongs to the technical field of conveyors. The online monitoring tube expansion prevention protection device for the circular tube belt conveyor comprises ultrasonic directional transmitters and ultrasonic directional receivers, the ultrasonic directional transmitters and the ultrasonic directional receivers are arranged on the two sides of the circular tube belt conveyor respectively, the number of the ultrasonic directional transmitters and the number of the ultrasonic directional receivers on each side are both two, and the number of the ultrasonic directional transmitters and the number of the ultrasonic directional receivers on each side are both two. The ultrasonic directional transmitter and the ultrasonic directional receiver which are in the opposite state are at the same height, and the ultrasonic directional transmitter, the ultrasonic directional receiver, the coal feeder and the round pipe belt conveyor are all connected with a round pipe belt conveyor PLC. According to the utility model, directional sound wave transmission and feedback receiving are combined with PLC control of the circular tube belt conveyor, so that the device has the advantages that the accumulation condition of materials in the rubber belt in the running and conveying process can be monitored on line in real time, and tube expansion is prevented fundamentally.

The invention relates to a forming and surface treatment method of a twisted waveguide, and belongs to the field of metal additive manufacturing technology and surface treatment. The manufacturing technical problems that parting manufacturing precision and reliability are poor, torsional deformation and position tolerance of torsional forming are not easy to guarantee, and a welding position is prone to deformation are solved, and the problem that a twisted waveguide not plated with a copper layer is large in microwave transmission loss is solved. The method comprises the following steps: modeling a designed twisted waveguide, and completing support adding and slicing processing; aluminum alloy powder is added into a forming equipment material cylinder; performing selective laser melting forming by adopting the slice file to obtain a twisted waveguide with a substrate and a support; separating the twisted waveguide from the substrate and the support; carrying out finishing processing on the twisted waveguide by adopting chemical polishing; and plating the twisted waveguide by adopting chemical plating to obtain the twisted waveguide with the plating layer. The additive manufacturing integrated forming and surface treatment process is adopted, the production period is effectively shortened, the product quality reliability is improved, and the microwave transmission loss is reduced.

A frequency selective unit, a frequency selective surface, and an antenna base station. The frequency selective unit comprises a metal reflector plate and at least two conductive material pattern layers, wherein through holes are provided in the metal reflector plate, the at least two conductive material pattern layers run through the through holes, and there is a gap between the conductive material pattern layers and the metal reflector plate; and at least one conductive material pattern layer comprises a first transmission mode, and at least the other conductive material pattern layer comprises a second transmission mode, and in a transition band, electromagnetic waves in the two transmission modes have opposite phases and cancel each other, such that the electromagnetic waves cannot be transmitted through the frequency selective unit; moreover, an electromagnetic wave transmission zero can be generated in the transition band, and a sharp roll-off is formed at an out-of-band edge of a second band, thereby realizing high-frequency selectivity. The conductive material pattern layers are not parallel to the metal reflector plate, the transmission direction of the electromagnetic waves is parallel to the surfaces of the conductive material pattern layers, and it is not necessary to provide a metallized via hole between the at least two conductive material pattern layers to perform electrical connection, thereby simplifying the manufacturing process and processing difficulty of the frequency selective unit.

The invention provides a controllable processing method for a photoetching single crystal optical fiber multi-ring cladding based on femtosecond laser and a multi-ring mask plate. The technical bottlenecks that in the prior art, the processing efficiency is low, the processing length is limited, and the structural precision is insufficient are effectively solved. The core of the method is that high-energy ultrashort pulse laser generated by a femtosecond laser is combined with a spatial light modulation technology of a programmable multi-ring mask plate to generate multi-layer femtosecond laser spots in specific annular distribution. Micron-scale focusing of multi-ring femtosecond laser beams can be achieved through a precisely-designed optical system, and precise spatial selective refractive index modulation is achieved on the cross section of the single-crystal optical fiber. Compared with a single-crystal optical fiber with a single-multi-ring annular cladding structure, the multi-ring annular cladding structure can further enhance the suppression capability of the multi-ring annular cladding structure on a high-order mode, realizes flexible regulation and control of a light wave transmission mode field, effectively reduces the influence of a multi-mode interference problem in the single-crystal optical fiber on the signal quality, and improves the signal quality. The stability of signal transmission and the quality of sensing signals are improved, and the application requirements of different scenes are met.

The invention discloses a micro-through-hole structure polymer metallization method for guided wave transmission, and belongs to the technical field of photoelectric device processing, a polymer substrate is used for replacing a traditional all-metal material, and the micro-through-hole structure polymer metallization method for guided wave transmission is achieved through the multi-stage processes of plasma activation, chemical coarsening, sensitization, chemical plating, electroplating and the like. And forming a compact and high-adhesion metal layer on the inner surface of the through hole of the polymer substrate. In the process, a microfluid pump or a peristaltic pump is adopted to drive the solution to circularly flow in the through hole and the microcavity. According to the micro-through-hole structure polymer metallization method for guided wave transmission, dynamic flowing of a chemical plating solution in a micro-through hole and an internal cavity is achieved by introducing a micro-fluid pump or a peristaltic pump, and therefore a uniform, compact and firmly-attached metal layer is obtained.

The invention provides a plasma transient time boundary-based terahertz wave spectrum regulation and control method and device, and the method comprises the steps: obtaining femtosecond laser and terahertz waves, and enabling the femtosecond laser and the terahertz waves to enter a terahertz wave transmission space through beam combination; when the femtosecond laser and the terahertz wave synchronously pass through a first position point, the terahertz wave after frequency spectrum regulation and control is obtained; the first position point is located in the terahertz wave transmission space, a time boundary caused by medium transient refractive index sudden change is formed at the first position point when the femtosecond laser ionizes gas to obtain plasma, and frequency shift occurs when terahertz waves pass through the time boundary. According to the invention, the modulation effect on the terahertz wave frequency demand can be realized according to the abrupt change of the refractive index caused by the transient generation of the plasma.

The invention relates to the technical field of electric power engineering, in particular to an electric power scene visual key information side end compression and transmission system, which comprises the following steps of: when wireless network transmission is invalid or does not meet the image data transmission requirement, loading a variable-length code with verification of an image at each sampling moment to a carrier wave in a millimeter wave reference signal form for modulation; obtaining a millimeter wave modulation signal; transmitting the millimeter wave modulation signal to a monitoring work station through a millimeter wave transmission channel, so that the monitoring work station demodulates the millimeter wave modulation signal and obtains image edge information; and when the light intensity is weak or the power scene is shielded, processing the multi-frame millimeter wave echo point cloud data, obtaining the information of the invasive or dangerous object, fusing the information with the edge information of the corresponding timestamp image, and then carrying out non-maximum suppression operation to obtain target fusion information. According to the invention, the transmission data capacity is reduced, the continuous transmission of information is ensured, the adaptability of the system in a complex network environment is enhanced, and the safe and stable operation of the power system is maintained.

The embodiment of the invention provides a multi-physical field collaborative simulation method and device for a high-speed silicon-based electro-optical modulator, and the method comprises the steps: building a physical model of the electro-optical modulator, carrying out the simulation under different bias voltage and temperature conditions, solving a Poisson equation, a carrier continuity equation and a drift diffusion transport equation, and obtaining the corresponding carrier concentration distribution; performing small-signal simulation analysis on the model to obtain corresponding PN junction electrical characteristic parameters; performing waveguide optical mode simulation on the model to obtain corresponding electric field mode distribution and effective refractive index, and calculating the effective refractive index and absorption coefficient change of the waveguide; constructing a traveling wave electrode model, simulating the traveling wave electrode model to solve an S parameter of a traveling wave electrode, and determining a distribution parameter of the no-load traveling wave microstrip line; a load traveling wave transmission line model is constructed in combination with PN junction electrical characteristic parameters, and based on the model, the frequency response characteristics and the modulation bandwidth of the electro-optical modulator at different temperatures are determined, so that the accuracy of a simulation result can be improved.

A metasurface unit is printed on a dielectric substrate by adopting a double-layer metal structure, a top-layer metal structure comprises a central cross-shaped metal patch, an edge square ring metal patch and rectangular metal patches on two sides, the central cross-shaped metal patch is placed at the central position of the dielectric substrate, and the edge square ring metal patch is placed at the central position of the dielectric substrate. The edge of the edge square ring metal patch coincides with the edge of the dielectric substrate, the rectangular metal patches on the two sides are placed between the central cross-shaped metal patch and the edge square ring metal patch and connected with the edge square ring metal patch, and a gap is reserved between the rectangular metal patches on the two sides and the central cross-shaped metal patch. PIN diodes are loaded at gaps between the rectangular metal patches on the two sides and the central cross-shaped metal patch; the bottom layer metal structure is obtained by rotating the top layer metal structure by 90 degrees according to the normal direction, and the top layer cross-shaped metal patch and the bottom layer cross-shaped metal patch are connected through a metal through hole. According to the invention, the self-adaptive switching wave transmission and reflection functions can be realized.

The invention discloses a multi-dielectric-layer pressure-resistant composite material and application of the multi-dielectric-layer pressure-resistant composite material in an antenna housing. The multi-dielectric-layer pressure-resistant composite material has a light high-strength structure and also has high wave-transparent performance. The multi-dielectric-layer pressure-resistant composite material specifically comprises a plurality of high-structural-strength surface layers and supporting core layers which are arranged in sequence, and the high-structural-strength surface layers are located on the outermost layer. The high-structural-strength surface layer is made of a fiber-reinforced resin-based composite material, and the supporting core layer is made of a low-density pressure-resistant composite material. Compared with the prior art, the multi-dielectric-layer pressure-resistant composite material provided by the invention has the following progress: the multi-dielectric-layer pressure-resistant composite material is low in dielectric constant, pressure-resistant and high in wave-transparent performance, can meet the index requirement that the insertion loss is less than 1.5 dB, and can also meet the pressure requirement of external pressure. And multi-frequency-band design can be carried out for different wave-transparent and pressure-bearing requirements.

The invention discloses a wave-absorbing and wave-transmitting switchable multifunctional stealth metasurface, and belongs to the technical field of electromagnetic functional materials, the metasurface is formed by periodically arranging a plurality of metasurface units, each metasurface unit comprises a resonance layer, a graphene capacitor layer and a frequency selection surface layer, a first resonance layer, a second resonance layer, a graphene capacitor layer, a third resonance layer and a frequency selective surface layer are sequentially arranged from top to bottom, and gaps between the layers are filled with PMI foam to serve as supports. The resonance layer and the frequency selection surface layer are formed by a dielectric substrate and a metal patch; a PIN diode is integrated on the metal patch of the frequency selection surface layer; and a rectangular groove is formed in the middle of the graphene capacitor layer. According to the multifunctional stealth metasurface, the scattering characteristic of the metasurface is tunable, the transmission characteristic of the metasurface is reconfigurable, and the multifunctional stealth metasurface has the advantages of being wide in scattering adjustment bandwidth, small in transmission frequency band loss, low in manufacturing cost, easy to adjust and control and the like.

The invention provides a permeable breakwater and a design method thereof, and relates to the technical field of permeable breakwater. Aiming at the lack of a design method for high-precision environment coupling and high-accuracy structure stress prediction during design of a permeable breakwater in the prior art, the method comprises the following steps: establishing a wave-structure-foundation coupling model based on structure stress data, environment soil characteristics and a transmission coefficient of waves; s5, selecting a wave-structure-foundation coupling model, simulating different structure parameter combinations based on the wave-structure-foundation coupling model, and when the simulation results do not meet the target requirements, circularly executing the steps S2 to S5 until the simulation results meeting the target requirements are screened out, and determining a corresponding final structure parameter combination. The cooperative working mechanism of the reduction foundation and the pile foundation is realized, the dynamic interaction of the wave load and the structural response is simulated, and the environmental coupling precision and the structural stress prediction accuracy are improved.

The bionic snakelike robot comprises a robot body and a control module, the robot body comprises a plurality of steering engine assemblies, a head structure and a plurality of driving ridges, each steering engine assembly comprises a steering engine and a mounting frame, the steering engines are arranged in the mounting frames, and the steering engines are connected with the control module; the clamping structure comprises a swing base and two clamping columns, and the swing base is connected with a driving arm of the steering engine; the two clamping columns are arranged on the two sides of the other end of the swing base. The head structure is connected with the mounting frame of one steering engine assembly; the multiple driving ridges are of hose structures and are connected to the mounting frame, the multiple steering engine assemblies are sequentially connected through the multiple driving ridges, the driving ridges are clamped between the two clamping columns, and in the left-right reciprocating motion process of driving arms of steering engines, hoses are driven by the clamping structures to swing in a reciprocating mode, so that wave transmission is formed, crawling of a snake is simulated, and the effect of simulating crawling of the snake is achieved. The problem that a traditional robot connected through a rigid joint lacks self-adaptive capacity in a complex environment can be solved.

The present disclosure relates to a millimeter wave transceiver device and a communication system. The device comprises: a digital intermediate frequency module, at least two millimeter wave transmission modules and at least two millimeter wave remote-end modules; the digital intermediate frequency module is connected to at least two millimeter wave transmission modules, and the at least two millimeter wave transmission modules are connected to at least two millimeter wave remote-end modules in one-to-one correspondence; the digital intermediate frequency module is configured to send the downlink radio-frequency sending signal, and receive the uplink radio-frequency receiving signal; the millimeter wave remote-end module is configured to radiate and transmit a downlink millimeter wave transmission signal, radiate and receive the uplink millimeter wave receiving signal, convert the uplink radio-frequency receiving signal, and convert the downlink radio-frequency sending signal and a downlink millimeter wave transmission signal; the millimeter wave transmission module is configured to transmit downlink radio-frequency sending signal and uplink radio-frequency receiving signal between the digital intermediate frequency module and the millimeter wave remote-end module.

The invention discloses a frequency selection absorber design method based on cross-layer electromagnetic function decoupling mapping and cross-layer coupling electromagnetic network abstraction, which comprises the following steps: decoupling and mapping wave absorbing and wave transmitting function requirements to a set space region of a double-layer structure through cross-layer electromagnetic function decoupling mapping, forming a physical structure comprising an edge loss region, a central resonance region, a middle coupling region and a system wave-transparent resonance region; abstracting the physical structure into a unified model comprising a composite RLC integrated network, a band-pass resonance network and a coupling network through cross-layer coupling electromagnetic network abstraction; carrying out collaborative optimization on model parameters of the unified model so as to realize path collaborative control of electromagnetic energy of the frequency selection absorber under frequency band selection; and meanwhile, the ultra-thinness and robustness of the structure are realized. According to the invention, an integrated design normal form for solving functional contradictions in principle is adopted, and the inherent contradiction between broadband wave absorption and extremely low loss wave transmission is solved.

The invention discloses an energy selective surface with a low-frequency cross-band ultra-wideband characteristic. The energy selective surface comprises a top-layer metal structure unit, a middle-layer dielectric substrate and a bottom-layer metal structure unit. The top layer metal structure unit is composed of nine cross-shaped patch metal structures and PIN diodes, and the bottom layer metal structure unit is formed by rotating the top layer metal structure unit by 45 degrees. When high-power electromagnetic waves enter the structure, the PIN diode is conducted and is equivalent to a resistor, power protection is achieved within the range of 0-5.6 GHz, and the transmission coefficient is restrained to be below-15 dB; when a low-power electromagnetic wave enters the structure, the PIN diode is disconnected and is equivalent to a capacitor, wave transmission is realized in the range of 0-5.6 GHz, and the transmission coefficient is more than-3dB, so that the functions of low-power wave transmission and high-power protection are realized in the low-frequency range of 0-5.6 GHz, the suppression performance is enhanced, and the antenna housing has an application value for the design of a low-frequency antenna housing.

The invention discloses a temperature monitoring system suitable for a fusion reactor low-clutter system and an over-temperature protection method. The temperature monitoring system comprises a high-speed temperature acquisition unit, a thermocouple sensor, an industrial control upper computer and a database server. A microwave excitation signal of the microwave excitation source is amplified by the microwave source klystron and then transmitted to the low-clutter coupled antenna through the microwave transmission line, and a plurality of temperature measuring points are arranged on the waveguide surface of the microwave transmission line and the end face of the low-clutter coupled antenna. Measurement output ends of the thermocouple sensors are uniformly accessed and gathered into the high-speed temperature acquisition unit and are uploaded to the industrial control upper computer, and the industrial control upper computer records and stores acquired multi-channel real-time temperature data, control signal output values and alarm events into the database server. The method has the advantages that early warning and temperature regulation are carried out for potential thermal runaway faults, so that the equipment safety of a high-power microwave transmission device and the normal operation of a low-clutter current driving system are guaranteed.