26 results about "Ku band" patented technology

The invention provides a multi-band composite high-integration TR assembly. The multi-band composite high-integration TR assembly comprises a shell, a front multi-layer board, a back multi-layer board, a C / X / Ku band receiving and transmitting circuit, a C / X / Ku band single receiving circuit and a Ka band receiving and transmitting circuit, wherein the front multi-layer board and the back multi-layer board are connected in the shell, the C / X / Ku band receiving and transmitting circuit is connected with the front multi-layer board, and the Ka band receiving and transmitting circuit is connected with the back multi-layer board. The low-cost scheme design of an all-solid-state microwave multilayer board suitable for batch production and testing is adopted, ports and transmission line layout are reasonably designed, multi-band composite mode transmission is achieved in the form of the front face and the back face, a C / X / Ku-band transmitting circuit and an H-polarization receiving circuit are integrated on the front face, and the transmission efficiency is improved. A C / X / Ku frequency band V polarization receiving circuit and a Ka frequency band receiving and transmitting circuit are integrated on the reverse side, different functional circuits are respectively transmitted through a microstrip line and a strip line through an interface circuit structure covering 1-40 GHz and an in-board vertical transition structure, the isolation degree of different circuits is improved, mutual crosstalk between different signals is avoided, and the transmission efficiency is improved. And the functions of high integration, high consistency, ultra wide band, numerical control phase shift, numerical control attenuation and the like of the assembly are realized.

The application provides an emergency information service system and method based on satellite communication and ground mobile communication fusion, the system comprises: a high flux satellite fixed station terminal, a Ku band 0.6 meter VSAT terminal is adopted, an ACU and a MODEM are integrated, a three-axis structure and a carbon fiber antenna are provided; a ground mobile communication subsystem, comprising a 4G skin base station, a security gateway and a signaling gateway; a multi-WAN port routing device realizes dynamic load balancing of satellite and ground broadband; an emergency power supply system is composed of a generator and a power bank to form a three-level power supply; a network management and monitoring system supports remote configuration and AI optimization. The method comprises the steps of disaster monitoring, system activation, network establishment, signal coverage, communication service and management and maintenance. The application combines AI driven network optimization to quickly establish a reliable communication network in an emergency scene through satellite and ground communication fusion, has the characteristics of wind load resistance, low time delay, intelligent scheduling and the like, and significantly improves the emergency communication guarantee capability.

The invention provides a ku-frequency-band unmanned aerial vehicle countering radar and a target detection method and device, and belongs to the technical field of radars, and the ku-frequency-band unmanned aerial vehicle countering radar comprises a transmitting system which is used for outputting electromagnetic waves of a ku frequency band; the antenna is used for performing directional radiation on the electromagnetic waves of the ku frequency band and receiving echo signals reflected by a target object; the antenna comprises at least one array plane module, and the array plane module is detachably arranged. The receiving system is used for sending the echo signal received by the antenna to the signal processing system; the timing synchronization system is used for providing synchronous clock signals for the transmitting system and the receiving system; and the signal processing system is used for detecting the unmanned aerial vehicle based on the echo signals, determining motion state parameters of the unmanned aerial vehicle and outputting the motion state parameters of the unmanned aerial vehicle to the countering execution system. According to the ku-band unmanned aerial vehicle countering radar and the target detection method and device provided by the invention, the universality and flexibility of the unmanned aerial vehicle countering radar can be improved.

The invention discloses a cubic ZIF-67 / MXene wave-absorbing material as well as a preparation method and application of the cubic ZIF-67 / MXene wave-absorbing material. The preparation method comprises the following steps: reacting lithium fluoride, concentrated hydrochloric acid and deionized water to generate hydrofluoric acid, and etching an MAX phase to obtain MXene; the preparation method comprises the following steps: dispersing CoCl2. 6H2O, cetyl trimethyl ammonium bromide (CTAB) and MXene in deionized water to form a solution A; dispersing 2-methylimidazole in deionized water to form a solution B; quickly pouring the solution A into the solution B, stirring and reacting, centrifuging, freeze-drying and annealing to obtain the cubic ZIF-67 / MXene wave-absorbing material. The material is of a multi-layer sandwich structure, the reflection loss at 16.69 GHz can reach-20.79 dB, the matching thickness is 1.87 mm, the effective absorption bandwidth (RL is smaller than or equal to-10 dB) is 6.19 GHz (11.81-18.00 GHz), and the Ku wave band is covered. The method is environment-friendly in process, low in cost, simple and convenient to operate and suitable for large-scale production, and has application prospects in the fields of microwave absorption, infrared stealth and photocatalysis.

This invention discloses a method for beam control of unconventional radar arrays. The method includes establishing a reference benchmark and initializing array parameters based on the unconventional radar array, determining core radar control parameters, determining radar beam control parameters, determining complex weighting coefficients for radar digital receiver multi-beam synthesis, and completing the radar array digital receiver multi-beam synthesis. This solution is applicable to unconventional phased array antennas with subarray-level random rotation and subarray-level random misalignment, and is compatible with beam control of conventional arrays. It has low computational complexity and introduces beam pointing accuracy error ≤0.01° and phase error ≤1° (Ku band and below), placing it at an industry-leading level. It is applicable to various phased array antenna architectures and has promising application prospects.

The utility model belongs to the technical field of filter structures, and particularly relates to a KU-frequency-band low-loss microstrip filter structure design which comprises a machine body and a prompting mechanism, the two ends of the machine body are fixedly connected with connector assemblies, the prompting mechanism is arranged on the connector assemblies, the prompting mechanism comprises an outer cylinder detachably connected to the connector assemblies, and the outer cylinder is arranged on the machine body. The inner side of the outer cylinder is rotationally connected with an inner cylinder, an observation opening is formed in the end, close to the inner cylinder, of the outer cylinder, and a prompt mark is arranged on the surface of the end, close to the outer cylinder, of the inner cylinder. According to the utility model, the inner cylinder and the outer cylinder can move relatively when the joint assembly and the connector are loosened, so that a maintainer can judge whether the joint assembly and the connector are loosened by observing whether a prompt sign is exposed in the observation port or not; and relative rotation between the connector assembly and the connector can be hindered through friction between the outer barrel and the inner barrel, and the loosening situation is reduced.

1. Name of the product in this design: Emergency Call Terminal (KU band). 2. Purpose of this design: For receiving emergency broadcast signals in the Ku band, parsing instructions, and ultimately achieving audio amplification and early warning. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

This invention proposes a broadband traveling wave suppression metamaterial, wherein the broadband traveling wave suppression metamaterial, a metal connection region, and an aircraft wing trailing edge skin are sequentially connected. The broadband traveling wave suppression metamaterial is disposed at the end of the metal connection region of the aircraft wing trailing edge skin. The impedance of the end of the broadband traveling wave suppression metamaterial near the end of the metal connection region is matched with the impedance of the end of the metal connection region, and the impedance of the broadband traveling wave suppression metamaterial gradually changes steplessly from near to far from the end of the metal connection region. The broadband traveling wave suppression metamaterial of this invention achieves excellent traveling wave suppression performance in the P to Ku bands and is maintenance-free; it solves the pain points of traditional traveling wave suppression materials, such as difficulty in low-frequency traveling wave suppression and high maintenance costs.

The invention provides an active frequency selective surface with polarization independence and angle stability, which comprises a dielectric substrate and cross-shaped metal rings arranged on the dielectric substrate periodically, the tail end of each arm of each cross-shaped metal ring is provided with a notch, each notch is bridged with a PIN diode, and the PIN diode is connected with the dielectric substrate. The cross-shaped metal ring and the four PIN diodes symmetrically arranged on the cross-shaped metal ring jointly form a 90-degree rotational symmetric structure, so that the active frequency selective surface has highly consistent frequency response characteristics for incident electromagnetic waves in different polarization directions; by synchronously controlling the on-off states of all PIN diodes, the resonant frequency of the active frequency selective surface is switched between two frequencies in a Ku wave band, the problem of polarization sensitivity caused by anisotropy of a traditional adjustable structure is fundamentally solved, and excellent polarization independence is achieved.

The invention relates to the technical field of electronic countermeasure load antenna array design, in particular to an unmanned aerial vehicle-mounted antenna array for unmanned aerial vehicle-mounted satellite chain ground node traceability, and the antenna array comprises a substrate, eight antenna units, and low-noise amplification modules connected with the antenna units in a one-to-one correspondence manner. Wherein the working frequency bands of the eight antenna units cover a Ku wave band of uplink communication of a star chain terminal, and the whole antenna adopts a fan-shaped ladder-shaped array structure: every two antenna units form a column, and array elements in the same column are of a vertical coplanar dual-element structure, so that the high consistency of channel response is ensured, and a hardware basis is provided for weak signal detection based on cross-correlation; the space amplitude and phase difference base line is constructed for amplitude-comparison and phase-comparison combined direction finding, meanwhile, light-weight design is combined, the space amplitude and phase difference base line is well matched with an unmanned aerial vehicle platform, and integrated coupling of the interception function and the direction finding function of star chain uplink signals is achieved.

The invention provides a high-selectivity one-to-four filtering power divider based on stub loaded resonators and T-shaped E-plane stepped waveguides, which relates to the technical field of filtering power dividers and comprises a third-order stub filter and a four-way power divider. An input signal firstly passes through the third-order stub filter and then is divided into four paths of output signals through the four-path power divider. Through the synergistic effect of the stub loaded resonators and the E-plane stepped waveguides, six transmission zeros can be generated on the two sides of a Ku wave band pass band, the steepness of the edge of the pass band reaches-40 dB or below, pass band and stop band signals are effectively distinguished, the frequency selectivity is improved, and the problems that in the prior art, the pass band transition bandwidth is large, and interference suppression is poor are solved.

The application discloses a preparation method of a CeO2-Co electromagnetic wave absorbing material. First, CeO2 nanorods with uniform sizes are prepared through a hydrothermal synthesis method; then, the CeO2-Co electromagnetic wave absorbing material is prepared through an impregnation method and a high-temperature calcination method; finally, the CeO2-Co material is uniformly mixed with carbon nanotubes and paraffin according to different filling amounts, is pressed into a ring with a thickness of about 1.5-2.5 mm under a specific mold, and electromagnetic wave absorbing performance test is carried out on the ring. Test shows that the reflection loss value of the material reaches -40 dB at 2.5 mm; the effective absorption bandwidth is 5.7 GHz (11.2-16.9 GHz), covering the entire Ku band and part of the X band.

A dual-band satellite antenna having a frequency switching function is described. One aspect of an embodiment relates to a dual-band satellite antenna having a frequency switching function, where the satellite antenna includes: an antenna unit for receiving a satellite signal; a first frequency processing unit configured to process a Ka band frequency for the satellite signal; a second frequency processing unit configured to process a Ku band frequency for the satellite signal; and a switching unit configured to select either the first frequency processing unit or the second frequency processing unit.

This invention discloses a broadband filtered L / S band circularly polarized-Ku band MIMO common-aperture antenna, relating to the field of microwave communication technology. The antenna includes a crossed dipole radiator, a dielectric substrate, four rectangular patches, four metal strips, a metal ground plane, a probe for exciting the Ku band MIMO antenna, and a feed axis for exciting the L / S band circularly polarized antenna. The crossed dipole radiator consists of rectangular patches and phase delay lines located on the upper and lower surfaces of the upper dielectric substrate. The phase delay lines provide a 90° phase difference, thus forming circularly polarized radiation. The positions of the rectangular patches and metal strips on the upper and lower surfaces induce coupling, broadening the impedance bandwidth and axial ratio bandwidth of the L / S band antenna. This invention features a simple structure, low cost, and superior performance. Furthermore, it achieves high isolation between the two frequency bands through a closed substrate integrated waveguide, and the Ku band antenna can also improve the performance of the L / S band antenna.

The application provides a low-loss reconfigurable artificial surface plasmon transmission line, which comprises a dielectric substrate and a metal structure thereon. The metal structure is composed of periodically arranged first metal units; the first metal unit comprises a rectangular metal with a certain width, a zigzag metal and two varactor diodes, the rectangular metal is vertically placed with the zigzag metal, and the varactor diodes are connected in parallel to the two metal parts; the zigzag metal structure is in a corrugated shape, and the protruding part is a triangle. The low-loss reconfigurable artificial surface plasmon transmission line provided by the application can realize obvious loss reduction, realize continuous amplitude modulation of-1 dB to-40 dB in the Ku band, realize continuous phase modulation of more than 160° in the X band, and is expected to be applied to radio frequency microwave circuits.

This invention provides a composite material with both broadband absorption and transmission functions. The material comprises the following layers in sequence: a metal FSS layer, a first subwavelength structural film layer, a first glass fiber reinforced substrate, a first foam layer, a second subwavelength structural film layer, a first glass fiber composite FSS layer, a second foam layer, a third subwavelength structural film layer, a second glass fiber composite FSS layer, a third foam layer, and a second glass fiber reinforced substrate. Adjacent layers are bonded together. The metal FSS layer is located on the outermost side and serves as a bandpass filter and impedance adjustment unit. The first and second glass fiber composite FSS layers are located on the inner side, with different patterns and sheet resistance values. They utilize ohmic loss and electromagnetic resonance of the dielectric layer to dissipate electromagnetic wave energy, achieving efficient transmission in specific frequency bands while exhibiting broadband strong absorption characteristics in out-of-band frequencies. Through the cooperation between the layers, the transmittance can exceed 80% in a specific frequency band of the S-band, and the absorption rate can exceed 80% in the X and Ku bands.

The invention provides a double-layer broadband metamaterial wave absorber covering a C-X-Ku wave band. The double-layer broadband metamaterial wave absorber comprises a copper substrate layer, a first filling layer, a first dielectric layer, a first copper resonance layer, a second filling layer, a second dielectric layer and a second copper resonance layer which are sequentially stacked from bottom to top. The first copper resonance layer comprises a copper square resonance ring, and four edges of the first copper resonance layer are respectively provided with two gaps with fixed intervals. A resistor element is loaded at each gap, and eight resistors are periodically and symmetrically distributed along the ring arms. And the second copper resonance layer comprises four copper right-angle resonance units which are arranged in a central symmetry manner. The two orthogonal arms of each unit are respectively provided with a notch, resistors are loaded at the notches, and the eight resistors are symmetrically distributed on the copper right-angle resonance layer. The invention has the characteristics of high absorption efficiency, wide absorption frequency band and low profile; the method has wide application prospects in the fields of electromagnetic modulation, electromagnetic stealth and the like, and is extremely high in practicability.

The utility model discloses a Ku wave band patch antenna integrated structure, and relates to the technical field of patch antennas. The Ku-band patch antenna integrated structure comprises a wireless radiation unit array, a hybrid feed network and a power division and synthesis module, the wireless radiation unit array is arranged in a regular matrix and used for transmitting and receiving multi-beam signals, the hybrid feed network comprises a strip line layer and a microstrip line layer, the strip line layer is arranged in an antenna substrate, and the microstrip line layer is arranged in the antenna substrate. The microstrip line layer is arranged on the surface of the antenna substrate and realizes signal coupling through a vertical transition structure, and the power division and synthesis module is integrated at the tail end of the hybrid feed network and is used for uniformly distributing emission excitation signals to each radiation unit and synthesizing received signals. The Ku wave band patch antenna integrated structure provided by the utility model is used for realizing collaborative improvement of wide frequency band, high integration level and high-precision scanning performance.

The present application relates to a kind of fiber reinforced wave-absorbing pipe, belong to pipe material technical field.To solve the problem of existing pipe electromagnetic shielding is not good, provide a kind of fiber reinforced wave-absorbing pipe, the fiber reinforced wave-absorbing pipe includes outer layer, intermediate wave-absorbing function layer and inner layer, the intermediate wave-absorbing function layer is between outer layer and inner layer, the intermediate wave-absorbing function layer includes the following component mass percentage: high-density polyethylene: 70~85%; Boron-doped SiC nanofiber: 10~28%; Silane coupling agent: 0.1~1.5%; Antioxidant: 0.15~0.3%, dispersing agent: 0.2~0.5%.8~18GHz frequency band electromagnetic wave can be effectively absorbed and attenuated, pipe material in 8~18GHz (Ku band) minimum reflection loss (RL min ) reach-45dB~-60dB, better guarantee the overall mechanical properties of pipe material.

The invention discloses a radar micro-Doppler target identification method based on deep learning, and belongs to the field of radar target identification. The method comprises the following steps of: constructing an N * M two-dimensional array and generating a data set of 0-255 amplitudes by using acquired target Doppler data after pulse compression and cyclic shift; a ResNet18 model is used for training a data set on an embedded server platform, and parameters are adjusted until the identification probability of a verification set reaches the standard; and converting the model into a format deployment adaptive to the embedded NPU, calling real-time data for reasoning through an API, and taking a target type corresponding to the maximum probability of reaching the standard. The specific implementation process of the method is described through a Ku-band FMCW radar data set. According to the method, the problems of long residence time and information loss of artificial features of traditional STFT are solved, the recognition efficiency and accuracy are improved, and the method is suitable for a radar system containing NPU to realize real-time target classification.

This invention discloses a waveguide polarization adjustment device for a Ku-band transceiver channel, comprising a polarization adjustment rotor capable of adjusting the waveguide polarization angle of the Ku-band transceiver channel; a common waveguide with the polarization adjustment rotor rotatably mounted inside; a drive mechanism capable of driving the polarization adjustment rotor to rotate; and a positioning component capable of detecting and positioning the rotation angle of the polarization adjustment rotor. The polarization adjustment rotor includes a cylindrical waveguide channel, a first annular groove, a polarizing plate, and a second annular groove. The first annular groove is formed at one end of the polarization adjustment rotor, and the second annular groove is formed at the other end. A cylindrical waveguide channel is hollow inside the polarization adjustment rotor, and a polarizing plate is centrally mounted within the cylindrical waveguide channel. By continuously rotating the polarization adjustment rotor 360 degrees within the common waveguide channel, the polarizing plate inside the cylindrical waveguide channel deflects synchronously, achieving precise fine-tuning of the electromagnetic wave polarization angle arbitrarily from 0° to 360°.

The invention discloses an X / Ku wave band compact dual-frequency multimode OAM antenna, and relates to the technical field of dual-frequency multimode vortex electromagnetic wave antennas. The antenna array comprises eight truncated hexagonal patch antenna units with asymmetric U-shaped grooves, a dielectric substrate, a metal grounding plate and a coaxial feeder line, a mirror image uniform circular array structure is adopted, eight dual-frequency antenna units are uniformly arranged at a fixed radius, and the upper half antenna unit and the lower half antenna unit of the array are in mirror image symmetry. By adjusting the feed phase of each array element, five different modes of OAM vortex electromagnetic waves are generated at 9.8 GHz and 14.0 GHz; the antenna is excellent in structural compactness, bandwidth performance, multiple modes and the like, and has obvious advantages compared with other similar antennas.

The utility model discloses a kind of 3-way DCSS output and 1-way Legacy output dual-polarization KU waveband high frequency head, it is related to KU waveband high frequency head technical field. Including main body, resonant cover, circuit board, F type connector and shell and the like components. Circuit board with integrated horizontal and vertical polarized front-stage low-noise amplifier, analog signal rear-stage amplification, PLL phase-locked loop frequency reduction and DCSS processing function is equipped in main body, horizontal and vertical polarized signal is processed after amplification in two ways: one way is output 950-2150MHz analog signal by PLL frequency reduction, another way is output 30 U (750-2350MHz) digital signal after digital processing by DCSS integrated circuit. The high frequency head has innovatively integrated 3-way DCSS digital output and 1-way Legacy analog output, adopts single cable transmission multi-channel signal, both meet modern digital satellite receiving demand, and compatible traditional analog equipment. Its aluminum alloy main body and resonant cover structure improve heat dissipation and protection level, especially suitable for multi-user satellite receiving scene, significantly reduce wiring cost and complexity.

The invention discloses a multi-layer metamaterial wave absorber with an ultra-wideband and a design method thereof, and belongs to the technical field of communication, and the design method comprises the following steps: designing the multi-layer metamaterial wave absorber with the ultra-wideband based on a genetic algorithm, the reflectivity of the multi-layer metamaterial wave absorber with the ultra-wide frequency band is smaller than or equal to 4% in the Ka wave band and the Ku wave band, and the reflectivity of the multi-layer metamaterial wave absorber with the ultra-wide frequency band is not larger than 10% in the X wave band and the C wave band. The wave absorber designed by the method can realize broadband under the condition of ensuring high absorptivity and relatively thin thickness.