19 results about "Microwave range" patented technology

This invention discloses a method, system, device, and medium for evaluating the performance of a high-precision space atomic clock. The method includes the following steps: calculating the relative clock difference between space and ground based on a two-way time difference measurement method; wherein, a distance inconsistency delay error is introduced for correction during the calculation of the relative clock difference; calculating stability, sky stability, and space-to-ground alignment accuracy based on the calculated relative clock difference; and achieving performance evaluation of the high-precision space atomic clock based on the stability, sky stability, and space-to-ground alignment accuracy. In the technical solution provided by this invention, a space-to-ground time alignment network system based on a microwave ranging link is used, and the relative clock difference information between space and ground is calculated based on a two-way time difference measurement method. Finally, the performance of the high-precision space atomic clock can be evaluated using the relative clock difference information.

An apparatus for connecting a monolithically integrated circuit to antenna elements of an antenna array including a decoupling unit for decoupling a signal emitted by the monolithically integrated circuit in the microwave range into a dielectric waveguide of a distribution network which includes dielectric waveguides and is designed to feed the decoupled signal into the antenna elements of the antenna array. Metal shields between adjacent dielectric waveguides of the distribution network shield the dielectric waveguides of the distribution network from one another.

A ultra-wideband interconnection probe (100) connectable to a first access port of a first electronic device (101), the first access port comprising a first tapered coupler (101a) and to a second access port of a second electronic device (102), the second access port comprising a second tapered coupler (102a), the ultra-wideband interconnection probe (100) comprising a dielectric waveguide structure (120) establishing a high-pass characteristic interconnect, operating over a high frequency range starting from a low cut-off frequency fCL in the microwave range or in the millimeter-wave range, wherein the dielectric waveguide structure (120) comprises a first tapered end (120a) connectable to the first access port via the first tapered coupler (101a) and a second tapered end (120b) connectable to the second access port via the second tapered coupler (102a).

A method for calibrating relative poses of heterogeneous sensors comprises the following steps: uniformly distributing a plurality of target points, and acquiring coordinates of the target points in a world coordinate system; establishing a camera coordinate system, and counting the coordinates of the target point in the camera coordinate system; shooting a target image containing all target points, identifying image coordinates of each target point, and reading two azimuth angles of the target points; establishing a microwave distance measurement coordinate system, and reading distance measurement information of each target point; calculating the coordinate of each target point in the microwave ranging coordinate system; establishing a microwave camera extrinsic parameter conversion relational expression and a camera world extrinsic parameter conversion relational expression; based on the microwave camera external parameter conversion relational expression and the camera world external parameter conversion relational expression, constructing an error equation, and solving an optimal solution by using a linear least square method; and completing the relative pose calibration of the two sensors by using the solved optimal solution.

The kitchen cabinet is mainly composed of a multi-layer storage cabinet, a microwave stove, an electromagnetic stove, a vegetable cutting pull plate, a cooking stove, a fresh-keeping cabinet, a hidden multi-suction-port range hood and a storage plate. The design facilitates humanized use and intelligent management, and saves space and cables. The multi-layer design of the multi-layer storage cabinet can make full use of space and facilitate taking and placing of articles; (2) the microwave oven solves the problem that steam, oil smoke and peculiar smell cannot be directly pumped outdoors when a microwave oven is used; (3) the electromagnetic range not only solves the problem that water and oil smoke are easy to enter the induction cooker to cause damage when the induction cooker is used, but also can pump the oil smoke generated during cooking outdoors; (4) the vegetable cutting pull plate is convenient to use, and kitchen knives and chopping boards are convenient to store; (5) a kettle, an electric cooker, chopsticks and bowls can be placed on the cooking stove, and steam generated when the kettle and the electric cooker are used can be pumped outdoors; (6) the fresh-keeping cabinet not only facilitates test, stir-frying and boiling of the food after fresh keeping, but also saves the occupied area, and the mobile phone intelligent temperature control can enable a user to know the proper temperature required by fresh keeping of various foods; (7) the hidden multi-suction-port range hood is independently used for indoor ventilation and can also be matched with a microwave oven, an induction cooker, a teakettle and an electric cooker for use; and (8) the storage disc facilitates storage of water and oil generated when the fresh-keeping cabinet and the hidden multi-suction-port range hood are used.

The invention relates to a method for operating a system for generating electromagnetic waves in the microwave range, wherein the system comprises a pulse generator for generating electrical pulses, a microwave generator (14) for generating microwaves, and a transmission line (13) between the pulse generator (10) and the microwave generator (14), wherein the method comprises: blocking a voltage output from the pulse generator (10) to the transmission line (13); after the blocking of the voltage output: outputting a voltage from the pulse generator (10) to the transmission line (13), wherein the voltage is below an ignition voltage of the microwave generator (14), in order to precharge the transmission line (13); after the precharging of the transmission line (13): outputting a voltage to the transmission line (13), said voltage being above the ignition voltage of the microwave generator (14), such that the microwave generator (14) generates electromagnetic waves in the microwave range.

The invention relates to the technical field of power transmission line inspection, in particular to a power transmission line centimeter-level tracking distance measurement method and system based on Doppler microwaves. A linear frequency modulation continuous wave microwave radar is arranged at an unmanned aerial vehicle, a broadband linear frequency modulation signal is transmitted to a to-be-detected target, and an echo signal is obtained; acquiring an analog beat signal based on the corresponding broadband linear frequency modulation signal and the echo signal; acquiring digital echo data based on sampling of the analog beat signal; and performing two-dimensional fast Fourier transform processing on the digital echo data to obtain distance information and relative speed information between the to-be-measured target and the unmanned aerial vehicle. Based on the Doppler microwave ranging principle, the centimeter-level high-precision tracking ranging technology is provided, and the distance between the unmanned aerial vehicle and the power transmission line is dynamically measured in real time in a high-precision mode in the dynamic process that the unmanned aerial vehicle polls the power transmission line.

A system and method of threat detection using a pulsed polarimetric radar system using microwave range of frequencies in the electromagnetic spectrum. The system uses a radar principle to transmit and receive the scattered response from the target. A time pulsed upconverted frequency system is used to sample the target over a specified radio frequency (RF) bandwidth. The full 2-port scattering matrix (comprising all co and cross s-parameters) is captured using only one antenna with an OMT and delay lines, that represent the target. Several decompositions are used to describe the polarimetric signature of the target. The system uses polarimetric approaches to measure scattering properties of anomalous object concealed beneath clothing. The co-polarized and cross-polarized signals are analyzed to determine if a person is carrying an anomalous object beneath their clothing.

The invention relates to the technical field of liquid crystal materials, and particularly discloses an isothiocyanate liquid crystal compound, a liquid crystal composition containing the isothiocyanate liquid crystal compound and a high-frequency assembly. The liquid crystal compound is a compound as shown in the following formula I, and Q1 represents O, S or Se. The main ring of the molecular structure of the liquid crystal compound provided by the invention contains a benzofuran, benzothiophene or benzoselenophene structure, and the liquid crystal compound with the specific structure has the advantages of higher clearing point, lower dielectric loss, higher dielectric tuning rate tau and higher quality factor eta. The liquid crystal composition containing the organic compound also has a higher clearing point, lower dielectric loss, higher dielectric tuning rate tau and a higher quality factor eta, and can be used for developing components and devices which are applied in a microwave range and have a high-frequency technology; the invention particularly relates to a microwave phase shifter, a tunable filter, a tunable metamaterial structure and an electronic beam control antenna. I.

The invention relates to a device (1) for connecting a monolithic integrated circuit (2) to antenna elements (3) of an antenna array (4), comprising a coupling-out unit for coupling out a signal output by the monolithic integrated circuit (2) in the microwave range into a dielectric waveguide (5) of a distribution network (6) consisting of dielectric waveguides, the invention relates to a distribution network (6) which is designed to feed out-coupled signals into antenna elements (3) of the antenna array (4), a metal shielding structure between adjacent dielectric waveguides (5) of the distribution network (6) shielding the dielectric waveguides (5) of the distribution network (6) from each other. The invention also relates to an antenna array, a radar device and a vehicle.

Ultra-wideband hybrid structure (100) for transmitting or receiving high-frequency electrical signals, wherein the hybrid structure (100) comprises: - a substrate (110); - a high-speed semiconductor substrate (105) connected to the substrate (110); - an electrical intermediate connection (115) provided between the substrate (110) and the high-speed semiconductor substrate (105); - an ultra-high-speed device for generating or detecting high-frequency signals, comprising a first access port (P1) and provided on the high-speed semiconductor substrate (105); - a dielectric waveguide structure (DRW) comprising a second access port (P2) providing a characteristic high-pass interface operating over a high-frequency range characterized by a low cutoff frequency f CLstarting in the microwave or millimeter wave range, wherein the waveguide structure (DRW) is provided on the substrate (110) and on the high-speed semiconductor substrate (105), wherein the waveguide structure (DRW) comprises a tapered end facing the first access port (P1) of the ultra-high-speed device; a metal waveguide structure (TSA) providing a characteristic low-pass intermediate that operates over a low frequency range from DC to a high cutoff frequency f CHoperating in the millimeter wave range, wherein the waveguide structure (TSA) is provided on the substrate (110) and on the high-speed semiconductor substrate (105), wherein the metal waveguide structure (TSA) comprises a metal waveguide pattern defining a tapered coupler, preferably a tapered slotted antenna “TSA”, around the tapered end of the dielectric waveguide structure (DRW) and connected to the first access port (P1) of the ultra-high-speed device.

The application discloses a power transmission line dynamic stereoscopic ranging method based on microwave interference and relates to the technical field of signal processing, which comprises the following steps: obtaining a ranging task instruction of a target power transmission line; generating dynamic microwave signals based on ranging accuracy levels; transmitting J microwave signals to the target power transmission line and receiving J reflected microwave signals of the target power transmission line; outputting J ranging analysis results according to microwave ranging analysis channels based on the J microwave signals and the J reflected microwave signals; collecting ranging signal transmission monitoring data sets and performing error compensation on the J ranging analysis results according to the ranging signal transmission monitoring data sets to obtain J ranging analysis optimization results; and integrating the J ranging analysis optimization results to generate a target stereoscopic ranging result. The application solves the technical problems of low measurement accuracy and weak anti-interference capability of the prior art in power transmission line ranging, and achieves the technical effect of improving the measurement accuracy and anti-interference capability of power transmission line ranging.

The application discloses a kind of sound-light linkage ecological simulation devices based on distance perception, it is related to intelligent interactive landscape lighting technical field.The device is by laterally installed microwave ranging sensor (0.2-8 meter detection range) real-time acquisition human distance signal, by MCU main controller based on sound-light dual-mode dynamic response algorithm, synchronous drive LED array and sound feedback module.On vision, LED light point quantity (N=k1*(d_max-d)) and flight speed (v=k2*(d_max-d)) dynamic change with distance;On hearing, scene audio volume (Vo=-30dBm+k3*(d_max-d)) real-time adjustment, form " person near light rise sound, person far light fall sound " full mimicry interactive effect.The device uses modular design, power supply system physical isolation (total current current-limiting 5A), response delay ≤100ms, applicable to theme park, immersive exhibition hall and public art device and smart garden and the like scene, can significantly improve the immersive feeling and artistic expressiveness of landscape environment.

The invention provides a double-satellite formation satellite orbit determination method and device based on inter-satellite relative optical imaging and microwave measurement, and the method comprises the steps: building a satellite motion equation based on orbit dynamics, and obtaining a state equation; establishing an observation equation based on inter-satellite relative optical imaging and microwave measurement; measuring the accurate orbit of the reference satellite A; the reference star A performs optical imaging on the target star B to obtain azimuth information of the star B relative to the star A; carrying out microwave distance measurement on the reference satellite A and the target satellite B to obtain relative distance information; calculating orbit parameters of the satellite B, and obtaining position coordinates and a satellite orbit of the satellite B according to the observation coordinate value of the satellite B relative to the satellite A and the state equation; and obtaining an orbit determination result of the target satellite at any moment. The economic benefit of satellite in-orbit operation can be improved.

This invention discloses a short-range microwave ranging method based on I / Q signal correction, belonging to the field of microwave ranging and signal processing technology. Addressing the issues of DC bias in I / Q signals caused by receiver non-ideals and clutter reflections, as well as trajectory distortion and demodulation errors caused by unknown amplitude modulation and I / Q amplitude-phase imbalance in microwave phase difference ranging, a correction process combining DC bias estimation and spectral correction is proposed. The method includes: constructing a ratio differential signal incorporating DC bias parameters; establishing an objective function based on elliptic fitting residuals and solving for the DC bias using an optimization algorithm; performing demodulation reconstruction and frequency domain analysis after DC compensation to solve for the amplitude-phase imbalance parameters; correcting the I / Q signals accordingly; and obtaining the target distance change through arctangent demodulation and phase expansion. This application can achieve parameter estimation under any unknown amplitude modulation conditions, improving the accuracy and robustness of short-range ranging.

The invention discloses a constellation satellite ranging correction method based on a microwave laser hybrid link, and belongs to the technical field of satellite navigation ranging. The method solves the problem that the distance measurement precision of an existing method is limited. According to the method, interpolation is carried out on the laser ranging information by adopting an interpolation method, high-precision laser ranging information can be virtualized at the moment without laser information, then the laser ranging information and microwave ranging information at each moment are fused on the basis of the optimal fusion theory, the ranging result at each moment can be fused with the laser ranging information, and the accuracy of the laser ranging information is improved. High-precision distance measurement between satellites is realized, and the distance measurement precision is obviously superior to that of a single observation source. According to the method, the distance measurement fusion result is converted into the position of the slave satellite in the reference coordinate system, a relative motion model of the master satellite and the slave satellite based on the CW equation is adopted, and a Kalman filtering multi-source information fusion algorithm is adopted based on the model, so that various errors caused by nonlinearity are avoided. The method can be applied to the technical field of satellite navigation ranging.

The invention provides a cabin body posture dynamic measurement fusion method and system based on microwave distance measurement, and the method comprises the steps: receiving and processing original observation data, obtained by a GNSS receiver and an inertial measurement unit IMU, of a cabin body, and executing a GNSS / IMU fusion algorithm to generate guide information; receiving original phase observation data of the microwave interrogator, and resolving by using guide information to obtain a high-precision geometric distance; and performing data fusion on the plurality of high-precision geometric distances and high-frequency attitude information output by an inertial measurement unit (IMU) in real time, and resolving to obtain a real-time pose of the feed source cabin in a global coordinate system. According to the method, GNSS / IMU fusion data is used as a guide value, so that the integer ambiguity resolving efficiency and the ranging precision of microwave ranging are improved; distance information, obtained through microwave distance measurement, of a plurality of measurement points of the cabin is fused with attitude information measured by the IMU, high-precision pose data is obtained, and all-weather and high-dynamic pose measurement is achieved.

The application discloses a kind of compatible visible light and radar stealth material and preparation method thereof, belong to nano particulate stealth material and its preparation technical field.The application solves the problems such as thick coating, large specific gravity of traditional visible light-radar compatible stealth shell core coating material.The application prepares the stealth material of ferrite wrapping reduced graphene oxide by hydrothermal method, the stealth material has core-shell 3D porous structure, so that the overall quality of material is light, and better realizes the high absorption performance in the range of visible light and microwave, and, the color of the stealth material prepared by the application is black, further shows high absorption to visible light, specifically, in 350~750nm visible light range, the absorption rate is 0.92~0.96, and the reflection loss of 2~18GHz microwave band is about-40dB.Moreover, the preparation method provided by the application has the advantages of simplicity, abundant raw material resources, small environmental pollution and the like.

The present invention relates to a system (100) for spatially detecting any foreign body within a product (135) based on the dielectric characteristics of the product (135), the system (100) comprising: conveying means (150) adapted to transport the product (135) through a scanning region (S) along a crossing direction (L), in a predefined crossing time interval (T) to cross the scanning region (S); a plurality of antennas (200) arranged transversely to the crossing direction (L), wherein each antenna (210) of the plurality of antennas (200) is adapted to operate in the microwave range, and wherein each antenna (210) is adapted to transmit an electromagnetic scanning signal adapted to propagate in the scanning region (S), to diffuse into the product (135);processing means (250) adapted to generate a first set of values ​​indicative of the dielectric characteristics of the product (135) based on at least one diffuse electromagnetic signal received by at least one antenna (210) of the plurality of antennas (200), the processing means (250) being adapted to compare the first set of values ​​with a second set of values ​​indicative of the dielectric characteristics of the product (135) in the absence of any foreign body, wherein each antenna (210) of the plurality of antennas (200) is adapted to transmit the electromagnetic scanning signal at least once in the crossing time interval (T), according to a predefined transmission frequency.