40 results about "Broad bandwidth" patented technology

Techniques pertaining to global cyclic shift delay (CSD) index assignment for 60MHz distributed-tone resource unit (DRU) short training field (STF) transmission in wireless communications are described. An apparatus (e.g., a station (STA) ) performs a wireless communication by: (a) generating and transmitting a DRU of a physical-layer protocol data unit (PPDU) with tones of the DRU distributed on a 60MHz distribution bandwidth of an 80MHz frequency subblock of two or more frequency subblocks of a wider bandwidth; or (b) receiving and processing the DRU. In performing the wireless communication, the apparatus applies a global CSD on transmission of a STF for the DRU in the distribution bandwidth of 60MHz.

The application discloses a method for sidelobe suppression of single-bit quantization Chirp signal, and the main technical content of the method comprises sidelobe suppression of single-bit quantization Chirp signal based on a convolution window function. The technical content performs sidelobe suppression through the following steps: step S1, generating a Chirp echo signal; step S2, single-bit quantization of the Chirp signal; step S3, single-bit quantization of a Chirp signal matching filter and adding a convolution window; and step S4, pulse compression of the single-bit quantization Chirp signal. The application can achieve a good compromise between quantization order and pulse compression effect, single-bit quantization can reduce quantization complexity to the maximum extent, and the sidelobe suppression method based on the convolution window function can effectively solve the problem of the decrease of the main sidelobe ratio caused by single-bit quantization. For Chirp signals and other radar signals with large time-bandwidth product, the application can improve the pulse compression effect, improve the range resolution of the radar system, and has certain reference significance for improved design in radar engineering technology.

A wireless device is configured to transmit radar signals at extremely low spectral density so that the receiver can be operated at the same time without saturating and thereby enabling full-duplex operation. To achieve sufficient range, beamforming is used together with a very long correlation time for detection of the radar signal, in which case the receiver can resolve backscattered or reflected radar signals far below the noise floor, while the bandwidth of the transmitted radar signal can be very high. The wide bandwidth enables the wireless device to maintain a low power spectral density while increasing output power, and also increase the depth resolution. The extremely low power spectral density even in the transmission beam direction makes the probability that communication will be disturbed very low. The high bandwidth calls for digital filters for both transmitted and received signals to equalize the radar frequency response characteristics of the radio unit.

This invention discloses an adaptive waveform scheduling method for swarm target tracking based on deep reinforcement learning. By constructing a state space that integrates swarm motion characteristics and spatial distribution, a composite reward function is designed to comprehensively optimize tracking accuracy, resolution, and trajectory stability. A Deep Belief Policy Gradient (DDPG) framework enhanced with Long Short-Term Memory (LSTM) networks is employed to dynamically determine waveform parameters (pulse width, bandwidth, and pulse period). Compared to traditional rule-based scheduling methods, this algorithm can effectively handle dynamic formation changes in swarm targets, balancing tracking accuracy, resolution, and stability in complex scenarios.

A smart ultrasonic integrated-circuit that allows at least one MEMS device to be combined with a piezoelectric transducer in a sensor array module. The sensor array module is capable of additional functionality for an advanced driver assistance system. For example, the MEMS device can add functionality because its wide bandwidth allows for simultaneous detection of audio signals and ultrasonic signals. Accordingly, the sensor array module may provide dual-mode (audio and ultrasonic) sensing in a single module. Additionally, the size / cost of a MEMS device allows for the use of a two-dimensional array for receiving ultrasonic echoes which can add a dimension to the ultrasonic range detection for a vehicle.

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 application discloses a kind of based on double-ridge substrate integrated waveguide and microstrip monopole antenna feed structure multiplexing co-boresight antenna, including double-ridge substrate integrated waveguide, surface plasmon polariton structure, Vivaldi radiator, metal grid array and integrated coaxial feed port, antenna uses multilayer stacking structure, surface plasmon polariton structure works as monopole in microwave frequency band, and high frequency and metal grid array jointly constitute metasurface lens;Vivaldi radiator is fed by double-ridge substrate integrated waveguide, for high-frequency end emission radiation;Two frequency bands are excited in orthogonal mode by integrated coaxial port and waveguide port respectively.The application is suitable for 5G / 6G base station, satellite communication and the like system, and has the characteristics of wide bandwidth, high isolation and structure multiplexing under compact profile.

The application discloses a model compression acceleration method for edge computing in an unstable network environment, and belongs to the technical field of edge computing and deep learning model optimization. The method performs multi-strategy hybrid pruning of artificial experience pruning, regularization pruning and reinforcement learning intelligent search pruning fusion on an original intelligent model in sequence to obtain a set of light-weight intelligent models. Soft label and hard label joint knowledge distillation is performed on the light-weight models as students and the original model as a teacher to realize secondary compression of the model. INT8 low-bit-width quantization and precision compensation are combined with the hardware characteristics of a domestic MLU200 deep learning processor to complete parallel acceleration optimization and deployment to an edge embedded device. The adaptive adjustment module is used to realize real-time sensing of network bandwidth, automatically reduce data transmission and model calculation when the bandwidth is reduced, guarantee low delay of distributed computing, and realize double improvement of model compression ratio and inference acceleration effect.

The application discloses an S-band reflective phase shifter based on a cross-coupling line coupler, and belongs to the fields of wireless communication and digital signal processing. The reflective phase shifter is designed based on the cross-coupling line coupler, has the advantages of small size, low insertion loss and wide bandwidth compared with existing branch line couplers and Langer couplers, can replace the digital phase shifter used by a traditional phased array antenna, and solves the problems of high cost and high power consumption of the traditional phased array antenna. In addition, the reflective phase shifter can be integrated on a PCB, has the advantages of easy processing, low cost and small size, is easy to be integrated with a planar printed phased array antenna, and realizes the miniaturization and low cost of the phased array antenna.

This invention discloses a structure and method for achieving wide-bandwidth beam characteristics based on an open-circuit resonator, solving the problems of wide-bandwidth angular domain, compact structure, and low cost compatibility in radar detection. The parasitic structure proposed in this invention is an open-circuit resonator array, composed of stacked subarrays of different frequency bands that are interconnected and cover the antenna's frequency band. The method includes designing the parasitic structure; stacking and assembling the arrays according to the number and frequency bands of the antenna stator arrays; combining the parasitic structure with the antenna; and achieving wide-bandwidth beam characteristics. This invention utilizes the omnidirectional radiation characteristics of the open-circuit resonator to form an array, extending the antenna's beamwidth over a wide range. The open-circuit resonator unit is relatively small, and this invention achieves beam extension functionality within a compact space, exhibiting miniaturization characteristics, and can be applied to small computers and UAVs. This invention prints the open-circuit resonator on the surface of a dielectric substrate, allowing for integrated design with the antenna, significantly reducing design, manufacturing, and installation costs.

This invention provides a broadband circularly polarized metasurface antenna, comprising a first dielectric substrate and a second dielectric substrate, a metasurface radiator, a sequential feed network, a metal reflector, a coaxial cable, a feed probe, and a metal short-circuit pin. The first dielectric substrate is disposed parallel to and above the second dielectric substrate. The metal reflector is printed on the lower surface of the second dielectric substrate. The metasurface radiator includes a square patch printed on the center of the lower surface of the first dielectric substrate, and an inner-ring metasurface array, an outer-ring metasurface array, and a quarter-wavelength branch printed on the upper surface of the first dielectric substrate. This broadband circularly polarized metasurface antenna provides a 37.74% operating bandwidth, a gain of 6.36–9.28 dBi, and good directional radiation performance, while also possessing the advantages of wide bandwidth, high gain, and small size.

This invention belongs to the field of communication antenna technology, specifically relating to a wide-bandwidth, wide-beamwidth, wide-axis-ratio circularly polarized antenna applied to the Ka-band. The invention includes: a first dielectric substrate, a second dielectric substrate, a third dielectric substrate, a fourth dielectric substrate, and a fifth dielectric substrate; a parasitic radiating patch disposed on the top surface of the first dielectric substrate; a main radiating patch disposed between the first and second dielectric substrates; a radiating ground plane disposed between the second and third dielectric substrates; a power divider network disposed between the third and fourth dielectric substrates; a power divider network ground plane disposed on the bottom surface of the fifth dielectric substrate; and a first metal pillar, the upper end of which is electrically connected to the power divider network, and the lower end which is on the same horizontal plane as the power divider network ground plane but not electrically connected; the main radiating patch and the power divider network are electrically connected through several power divider metal pillars. This invention addresses the technical problem of performance shortcomings of existing microstrip antennas in satellite communication.

This invention discloses a high-frequency, multi-channel, wide-bandwidth directional receiving array capable of operating at full ocean depth. The array includes an array housing and at least one receiving array module. Each module comprises an array frame and several ceramic elements. The array frame has a porous mesh structure with reinforcing frames on its front and rear sides. The number of ceramic elements corresponds to the number of mesh holes in the array frame, and the ceramic elements are placed within the corresponding mesh holes. An upper matching layer and a lower matching layer are respectively provided on the upper and lower surfaces of the array frame. Corresponding cutting marks are provided on the reinforcing frames on both sides. The upper matching layer has slots cut at the front and rear of the slots, which communicate with the mesh holes below. This invention solves the problem of simultaneously achieving wide bandwidth and wide directivity in multi-channel arrays, improving the detection coverage of multibeam bathysound sonar.

Techniques pertaining to transmission of 60MHz distributed-tone resource unit (DRU) on frequency subblocks of wider bandwidths in wireless communications are described. An apparatus (e.g., a station (STA) ) performs a wireless communication by: (a) generating and transmitting a distributed-tone resource unit (DRU) of a physical-layer protocol data unit (PPDU) with tones of the DRU distributed on a 60MHz distribution bandwidth of an 80MHz frequency subblock of two or more frequency subblocks of a wider bandwidth; or (b) receiving and processing the DRU.

This utility model discloses a miniaturized wideband beam millimeter-wave antenna, including an radome, an antenna cavity, and a mounting component. The radome is fixedly mounted on the antenna cavity via the mounting component. The antenna cavity includes a circular waveguide with cylindrical grooves around its periphery, giving the antenna a wide beam characteristic within the operating frequency band and improving the antenna pattern in the low-frequency band. The radome includes a matching medium located inside the circular waveguide to extend the low-frequency operating bandwidth, thereby ensuring a gain greater than -0.5 dBi within a ±60° range in the 26 GHz to 40 GHz operating frequency band. Filling the circular waveguide opening with the matching medium reduces the diameter of the circular waveguide, achieving antenna miniaturization. Furthermore, the built-in radome reduces manufacturing costs, and mounting it externally to the equipment chassis avoids the influence of the internal structure of the chassis on performance, thus improving the antenna pattern.

The technology disclosed herein relates to enhancing millimeter (mm) wave coverage within a wireless telecommunications network. It is commonly known that mm waves have difficulty propagating through materials. Urban areas pose significant hurdles for mm waves since a line of sight (LOS) to a user device is often times blocked by a physical object (e.g., building, tree, car, etc.). However, mm waves are desirable because of the wide bandwidths available for carrying communications at that frequency range. Embodiments herein provide methods, systems, and computer-storage media for adjusting a transmission power of a mm wave such that it can propagate through a physical object when a permittivity of an external material of the physical object is within a specified range where power adjustment would successfully propagate the mm wave through the physical object.

This invention relates to the field of antenna technology and discloses an integrated transceiver device for an ultra-wideband beam antenna and radome, comprising a coaxial connector, a dual-ridge waveguide, a coaxial-to-waveguide converter, a metal cap, a parasitic ridge horn section, a radome, and an integrated fixing frame. The dual-ridge waveguide is connected to the parasitic ridge horn section, and the coaxial connector is connected to the dual-ridge waveguide via the coaxial-to-waveguide converter. The metal cap seals the bottom of the dual-ridge waveguide, and the radome covers the radiating aperture of the parasitic ridge horn section and is fixed by the integrated fixing frame. The dual-ridge waveguide extends the main mode cutoff wavelength through the parasitic ridges, expanding the single-mode transmission bandwidth and achieving impedance matching with VSWR≤2 in the 5GHz~18GHz frequency band. Through an innovative integrated design, this invention achieves signal coverage across multiple frequency bands without significantly increasing the size, meeting the requirements of modern military communication and guidance systems for high-speed data transmission, strong anti-interference capabilities, and high confidentiality with excellent impedance and radiation characteristics.

This invention discloses a microwave and millimeter-wave circularly polarized antenna based on a SIW circular cavity, comprising a first dielectric substrate, a second dielectric substrate, a millimeter-wave radiating patch, a microwave radiating patch, a microwave feed patch, a metal via, a millimeter-wave SIW circular cavity, a metal ground plane, a microwave feed probe, a microwave feed network, and a millimeter-wave feed network. The upper surface of the first dielectric substrate is printed with the millimeter-wave radiating patch, the microwave radiating patch, and the microwave feed patch. The millimeter-wave radiating patch has a radiating slot, and the microwave feed patch and the microwave radiating patch are connected. The second dielectric substrate is located directly below the first dielectric substrate. The upper surface of the second dielectric substrate is printed with a metal ground plane, and feed slots and feed circular holes for the microwave feed probe to pass through are etched on the metal ground plane. The lower surface of the second dielectric substrate is printed with the microwave feed network and the millimeter-wave feed network. This invention has advantages such as multi-frequency operation, wide bandwidth, and dual circular polarization, and has certain potential in wireless communication applications.

This invention discloses a sequentially rotating broadband high-gain circularly polarized antenna, a conformal antenna, and their design methods. The antenna comprises two stacked dielectric substrates, with a radiating structure disposed on the upper surface of the upper substrate. The radiating structure includes a circularly polarized core unit and parasitic patches arranged around it. Connecting patches within the core unit introduce a 90° phase difference between two adjacent sides of the closed-loop patch, exciting circularly polarized radiation and establishing a sequentially rotating phase difference coupling field on the periphery. The parasitic patches obtain coupled feeding through the coupling field to broaden the bandwidth and improve gain. Coupling patches are arranged oppositely between the upper and lower substrates to improve impedance matching. When using a flexible substrate, the antenna maintains broadband circular polarization characteristics and a stable radiation pattern even when bent. This invention achieves an impedance bandwidth of 5.1–7.29 GHz, an axial ratio bandwidth of 5.28–6.77 GHz, a peak gain of 12.14 dB, and cross-polarization below -15 dB, making it suitable for 5G / 6G communication and satellite communication systems.

This invention discloses an integrated sensing and communication monopole antenna, belonging to the field of antenna and microwave technology. The antenna consists of a two-dimensional sector monopole antenna and a ground plane. The two-dimensional sector monopole antenna is placed vertically above the ground plane and connected to it via a coaxial cable. The main element can be tuned to operate using a mode adjustment device, achieving not only multi-mode resonant broadband characteristics but also continuous zero-directional frequency scanning characteristics (sensing function) in its elevation plane and stable unidirectional backscattering characteristics (communication function) in its azimuth plane, thus enabling the unit antenna to achieve integrated sensing and communication functions. This invention features wide bandwidth, light weight, and simple structure, and has broad application scenarios in the development of future low-complexity, high-performance intelligent radio systems.

The application discloses a kind of super surface broadband antennas based on eigenmode analysis, the upper surface of the antenna adopts non-periodic square super surface structure, by adjusting the size of different parts square patch and gap width, the modality significance and current distribution of super surface whole can be regulated, to filter out suitable mode.Determine the size of super surface whole, based on the current distribution obtained by eigenmode analysis, select the optimal feeding position, and adopt coaxial feeding mode to feed the antenna.The application applies eigenmode analysis to the design of non-periodic square super surface structure, by optimizing square patch of different cutting modes, the peripheral surface current is gathered on the center patch, so as to facilitate the observation of the modal characteristics and current distribution of super surface structure, quickly determine the appropriate mode and feeding position, simplify the design process of super surface antenna.

This invention discloses a high-brightness quantum light source for dense wavelength division multiplexing (DWDM) multichannel broadcasting, relating to the field of quantum information science and technology. It includes a silicon substrate layer 1; a silicon dioxide layer 2 disposed on the silicon substrate layer 1; and a thin-film lithium niobate device layer 3 disposed on the silicon dioxide layer 2. The thin-film lithium niobate device layer 3 contains a microring resonator 4 and a ridge waveguide 5 for coupling light into the microring resonator 4. The coupling structure between the ridge waveguide 5 and the microring resonator 4 is a sliding rail coupling structure, enabling both near-infrared and visible light to couple with the microring resonator 4 through this coupling structure. The microring resonator 4 has a periodic polarization structure, represented by dark and light stripes in the microring resonator 4. This invention provides a quantum light source that simultaneously satisfies wide bandwidth, ultra-narrow bandwidth, and high brightness, and can generate entangled photon pairs covering multiple DWDM standard channel wavelengths.

It provides a high-frequency balun with a wide bandwidth and a simple configuration. [Solution] The high-frequency balun 1 comprises a first coaxial cable 10, a second coaxial cable 20, and a third coaxial cable 30. The first coaxial cable 10 comprises a first portion SEC11 on the first end 101 side of the outer conductor splitting portion GAP, and a second portion SEC12 on the second end 102 side of the outer conductor splitting portion GAP. The second coaxial cable 20 and the third coaxial cable 30 have the same length as the second portion SEC12. The second coaxial cable 20 is arranged parallel to the second portion SEC12. The third coaxial cable 30 is arranged parallel to the first portion SEC11. The first end 101 of the first coaxial cable 10 constitutes an unbalanced terminal, and the end of the first portion SEC11 on the outer conductor splitting portion GAP side and the end of the second portion SEC12 on the outer conductor splitting portion GAP side constitute a balanced terminal.

This invention discloses a wide-bandwidth and wide-beam single-fed circularly polarized antenna element for the Ka band, relating to the field of satellite communication antenna technology. The antenna element comprises a multilayer dielectric substrate, a circular radiating patch, a metal ground layer, cross-shaped slots, arc-shaped slots, metal short-circuit posts, a microstrip feeding structure, and peripheral metal short-circuit vias. The cross-shaped slots consist of two intersecting slots of unequal length and four arc-shaped slots of unequal length, used to excite two orthogonal resonant modes; the four arc-shaped slots are located at the ends of the two intersecting slots to achieve miniaturization of the slot structure and improve the purity of circular polarization at low elevation angles; the metal short-circuit posts are used to improve the isolation between slots; the microstrip feeding structure achieves circularly polarized radiation through single-port coupling feeding. This antenna element can cover the Ka band from 27.5 GHz to 31 GHz and has advantages such as wide impedance bandwidth, wide axial ratio bandwidth and wide axial ratio beam, miniaturization, and ease of integration with active chips and feeding networks, making it suitable for satellite communication terminals and phased array antennas.

An electronic device may be provided with an antenna resonating element on a first substrate that is mounted to a second substrate. A signal conductor may be coupled to a feed terminal on the antenna resonating element. The signal conductor may include impedance matching structures for the antenna. The impedance matching structures may include an open transmission line stub, a grounded transmission line stub, and a phase shifting segment. The impedance matching structures may configure the antenna to exhibit a wide bandwidth in an ultra-wideband (UWB) frequency band. If desired, the signal conductor may have a phase-shifting segment configured to match a non-50 Ohm impedance of a radio-frequency front end coupled to the signal conductor.

This invention discloses a limiter chip, which includes a dielectric substrate and a limiting unit disposed on the dielectric substrate. The limiting unit includes a limiter cell disposed on the upper surface of the dielectric substrate and a ground plane that fully covers the back side of the dielectric substrate. The limiter cell includes an input terminal, an output terminal, six limiting stage diodes, four buffer stage diodes, two detection stage diodes, two choke inductors, a tuning capacitor, four ground terminals distributed at the four corners, multiple vias, and multiple transmission lines for connection. Each stage of diodes is grounded using an anti-parallel structure, and different stages are connected using choke inductors. The tuning capacitor is located after the choke inductor between the limiting stage and the buffer stage, connecting it in parallel to ground. This structure is used to limit the input signal. By integrating it onto a chip using integrated circuit technology, it has advantages such as high integration, wide bandwidth performance, wide application range, and low cost.

The application relates to a multi-frequency-band common-aperture base station antenna, which comprises low-frequency antennas, medium-frequency antennas and high double-frequency antennas which are coaxially arranged on the upper surface of a metal floor from top to bottom. The low-frequency antennas and the medium-frequency antennas are both composed of three-layer composite wave-transparent structures, the middle layer is used as a radiation structure of the antennas and is directly fed with electromagnetic waves from a feeder to radiate the electromagnetic waves outward, and the upper and lower layers are additional electromagnetic structures; the three-layer structure is a wave-transparent structure with frequency selection characteristics, and the introduction of the additional electromagnetic structures has little influence on the radiation effect and matching characteristics of the antennas; the medium-frequency antennas have wave-transparent characteristics to the high double-frequency antennas below; the low-frequency antennas have wave-transparent characteristics to the medium-frequency antennas and the high double-frequency antennas below; and the high double-frequency antennas are located at the bottom of the array. The multi-frequency-band common-aperture base station antenna realizes stable radiation in four working frequency bands, has the characteristics of multi-frequency band, wide bandwidth, small mutual interference and simple structure.