8results about How to "Guaranteed Phase Consistency" patented technology

The invention relates to the technical field of magnetic communication, in particular to a parallel multi-coil magnetic antenna and a transmitting magnetic communication system.The structure of the magnetic antenna is improved, a plurality of coils are wound on a magnetic core in parallel or in an overlapped mode, and the two ends of each coil are provided with connecting ends used for being connected with a signal driving circuit; the length and winding turns of each coil are the same, so that the size of the antenna is greatly reduced on the premise of not reducing the performance of the antenna; the magnetic antenna structure is applied to a magnetic communication transmitting antenna and a geomagnetic transmission communication system so as to realize geomagnetic transmission communication and positioning. Through the structural design of the parallel multi-coil closely-wound magnetic core, the effects of small inductance, multiple turns and large current of the transmitting coil in the earth-penetrating communication can be realized, and the application deployment on miniaturized portable earth-penetrating communication equipment is met.

This invention discloses a miniaturized four-channel combining module based on the TE20 mode, belonging to the field of millimeter-wave power combining technology. It includes a layered upper cavity, a mezzanine, a lower cavity, and an RF unit. The RF unit comprises a TE10-TE20 waveguide distributor, two amplification branches, and a TE20-TE10 waveguide combiner. Each amplification branch includes a TE20 mode filter, a waveguide-microstrip transition, a pair of amplifier chips, and a microstrip-waveguide transition connected sequentially. The TE10-TE20 waveguide distributor and the TE20 mode filter are disposed in the upper and lower cavities. The waveguide-microstrip transition, the pair of amplifier chips, and the microstrip-waveguide transition are disposed on opposite sides of the mezzanine. The TE20-TE10 waveguide combiner is disposed in the upper cavity, the mezzanine, and the lower cavity. This invention utilizes a high-isolation waveguide distributor / combiner to improve branch isolation, shorten the combining path, and has a compact overall structure with advantages such as wide bandwidth, high isolation, high combining efficiency, and miniaturization.

The invention discloses a three-way orthogonal coil receiving and signal merging method and a three-way orthogonal coil receiving and signal merging system for a rotary permanent magnet mechanical antenna, and belongs to the field of magnetic induction communication. The method comprises the following steps: performing analog conditioning and analog-to-digital conversion on received magnetic induction signals in each space direction, performing Hilbert transform on digital signals in each space direction, extracting instantaneous phase information of each channel, and obtaining complex signals in each space direction; and performing amplitude and phase coherence degree estimation on the complex signals in each spatial direction, determining a weight coefficient of each spatial direction based on the coherence degree between the complex signals in each spatial direction, and combining the complex signals in each spatial direction based on the weight coefficient of each spatial direction to obtain a combined signal. The signal amplitude of a receiving end signal is effectively improved, the signal-to-noise ratio is improved, and the direction robustness and the communication reliability of the system in a complex environment are enhanced.

The embodiment of the present application discloses a frequency synthesis circuit and method, the circuit comprises: a power divider, the input end of the power divider is connected with a reference clock signal, for distributing the reference clock signal into multiple sub-reference signals, and outputting the multiple sub-reference signals through the corresponding output end of the power divider; wherein the multiple sub-reference signals are consistent in phase and equal in power; multiple phase-locked frequency multiplication channels, the input end of each phase-locked frequency multiplication channel is connected with the output end of the power divider correspondingly, and the phase-locked frequency multiplication channel is used for generating a first frequency signal after phase-locked frequency multiplication processing according to the corresponding sub-reference signal; a synthesis control module, the input end of the synthesis control module is connected with the output end of the multiple phase-locked frequency multiplication channels, and the synthesis control module is used for synthesizing the multiple first frequency signals to generate a final output signal. The technical scheme of the embodiment of the present application generates signals with the same frequency and phase correlation through the multiple phase-locked frequency multiplication channels, and improves the spectral purity of the signals.

The invention provides a small-size delay network based on an SIP (Session Initiation Protocol) technology. The delay network comprises an amplifier, a delayer, a power divider, a switch and an equalizer, the radio frequency signal transmission sequence is as follows: four radio frequency input ends pass through four high-gain low-noise amplifiers; entering four delayers to complete the delay function of four branches; each path of radio-frequency signal is divided into two paths after passing through a single-pole two-throw switch, the two paths of radio-frequency signals are synthesized through a power divider, and the synthesized four paths of signals are selectively output through a single-pole two-throw switch; a delayer chip is arranged on the trunk; the radio frequency amplitude is compensated through an amplifier and an equalizer, and the whole delay network is arranged in a central symmetry mode. According to the invention, the radio frequency delay line chips are respectively arranged on the upper printed board and the lower printed board in the ceramic tube shell, the delay chips on the upper layer and the lower layer are interconnected through the solder balls, and the serial-to-parallel conversion chip and the delayer chip are directly bonded through the gold wire.

This invention discloses a method and system for identifying sorghum quality based on image processing, specifically relating to the field of grain quality detection technology. It addresses the problem of distortion in existing two-dimensional sorghum image features caused by the random posture of grains. The method involves allowing sorghum grains to roll freely on an inclined plane and collecting a continuous sequence of rolling images to establish a double ellipsoidal physical model with collinear major axes for posture fitting. Based on the model, the curvature-texture coupling distortion rate and topological continuity parameters are calculated, and the stability judgment result of the texture region is output after composite verification. In stable regions, the projected area isochronous transformation invariant is extracted as a geometric feature. Effective feature groups are screened through information entropy stability assessment, and finally, a mapping relationship is established with quality parameters to achieve support vector machine regression grading. This invention utilizes three-dimensional physical model constraints and dynamic stability verification to extract rotationally robust features from randomly moving images, achieving accurate quality identification.

This utility model discloses a shielded filter based on an integrated stripline resonator, belonging to the field of filter technology. It includes a resonator body with an RF connection line connected to it for signal input and output. Two resonator bodies are connected by a connecting post. A cavity houses both resonator bodies, shielding them. A mounting block is externally connected to the cavity, featuring through holes and a conformal curved surface for mounting the RF connection line. This shielded filter, through the cooperation of the resonator body and the cavity, forms a filter with a shielded cavity. This structure achieves filtering, and the integrated stripline design makes the filter easy to assemble, highly accurate, and ensures phase consistency.

The application discloses a kind of measuring device and method of satellite load active array, belong to satellite internet and 6G non-ground network test technical field.Device includes microwave darkroom, rotary table, multiple probe scanning frame and amplitude and phase controllable synthetic array.Satellite load active array to be measured is placed on rotary table, and radiation aperture is towards upwards;Multiple probe scanning frame is located above rotary table, and multiple antenna probes simultaneously collect near-field signal, and far-field pattern is obtained by near-far field conversion;Amplitude and phase controllable synthetic array is composed of amplitude and phase independently adjustable antenna unit, can be moved into above rotary table, and the electromagnetic wave of setting wave front is synthesized in the quiet zone covering the aperture of array to be measured, or each unit received signal is weighted and synthesized, to complete receiving directional diagram, transmit-receive frequency index, dynamic scene and system level performance measurement.The application shortens measurement distance, and measurement efficiency is improved by one to two orders of magnitude compared with single probe scanning, and flat installation reduces engineering difficulty, supports active array air interface measurement of no feed interface.