28 results about "Ultra wide bandwidth" patented technology

The invention discloses a waveguide power dividing device with a ridge on an H surface and a waveguide antenna, and belongs to the technical field of antennae, the waveguide power dividing device comprises a waveguide power divider, the waveguide power divider adopts a T-shaped structure, the waveguide power divider is provided with a waveguide transmission line, a branch waveguide A and a branch waveguide B, and the ridge is arranged on the H surface of the waveguide power divider; the feed end of the waveguide transmission line is used for feeding, the radiation end of the branch waveguide A and the radiation end of the branch waveguide B are used for radiation, and the electric fields of the radiation end of the branch waveguide A and the radiation end of the branch waveguide B are in the same phase. According to the invention, the problem that the directions of electric fields are opposite when H-plane waveguide feed passes through a one-to-two power divider is solved. According to the waveguide antenna, the waveguide power divider with the H face and the ridge is adopted, the complex structure of waveguide E-to-H is simplified, and meanwhile the profile of the antenna can be further reduced; the waveguide antenna provided by the invention has the characteristics of ultra wide band, wide beam, low side lobe and the like.

The invention discloses a low-scattering ultra-wideband wide-angle scanning antenna array, and belongs to the technical field of antennas. The antenna comprises an ultrathin wide-angle impedance matching layer and an antenna array. The antenna array comprises four antenna sub-arrays, and the antenna sub-arrays are arranged in a 2 * 2 chessboard mode; the antenna sub-array is composed of unit antennas arranged in a 8 * 8 rectangle. Wherein the unit antennas of two antenna sub-arrays are first ultra-wideband antenna units, and the unit antennas of the other two antenna sub-arrays are second ultra-wideband antenna units. The antenna array is low in profile, the VSWR can be kept to be smaller than 3.5 in the working frequency band of 2.5-18 GHz to meet the good radiation state, + / -72-degree large-angle beam scanning is supported, meanwhile, RCS reduction with the average being 8.7 dB and the peak value being 13.9 dB is achieved, and the array antenna design integrating the low profile, the wide frequency band, the wide angle and RCS reduction is achieved.

A system for a waveguide-based diplexer (wavelength multiplexer / demultiplexer) and polarizer having ultra-broad bandwidth, a compact footprint, low losses, fabrication robustness and a simple single etch fabrication process. The polarizer (TE-pass) is based on the phase-matched coupling of the unwanted TM0 mode in an input waveguide to the TM1 mode in a tapered directional coupler (DC), which is then guided through a low-loss bend (180-degree) and scattered in a terminator section with low back reflections. An S-bend is added before the output for filtering any residual TM0mode present in the input waveguide. The diplexer is based on a multimode interference (MMI) coupler and is designed at the first imaging length for 1550 nm wavelength resulting in a compact MMI length. In order to improve the extinction ratio, the output ports are made asymmetric in width.

Techniques related to ultra-wide-bandwidth (UWB) transmission mechanisms in wireless communications are described. A device (e.g., an access point (AP)) establishes a basic service set (BSS) on a primary link and a secondary link. The device then performs an aggregated bandwidth operation with one or more stations (STAs). The aggregated bandwidth of the primary link and the secondary link depends on the channel availability of each of the primary link and the secondary link.

The application discloses a planar low-profile ultra-wideband tightly coupled wide-angle scanning array antenna, which comprises the following: the antenna unit comprises a first layer metal patch, a first layer dielectric substrate attached to the first layer metal patch, a second layer dielectric substrate arranged in attachment to the first layer dielectric substrate, a second layer butterfly metal patch arranged on one end surface of the second layer dielectric substrate, a third layer dielectric substrate arranged in attachment to the second layer metal patch, and a fourth layer dielectric substrate arranged in attachment to the third layer dielectric substrate; and a feeding assembly, which comprises a metal ground arranged on one end surface of the fourth layer dielectric substrate, a coaxial probe, a metalized via hole arranged around the coaxial probe, a third layer planar metal strip arranged above the fourth layer dielectric substrate, and a metal short-circuit probe arranged on the opposite side of the antenna unit. According to the application, the antenna has a good cross-polarization ratio, realizes the performance of ultra-wideband and wide-angle scanning, and has the characteristics of low profile.

The application discloses a polarization-sensitive wide-angle matching structure and an ultra-wideband wide-scan-angle low-standing-wave tight-coupling antenna. The polarization-sensitive wide-angle matching structure comprises a first polarization-sensitive structure medium substrate, a first polarization-sensitive structure, a second polarization-sensitive structure medium substrate, a second polarization-sensitive structure, a third polarization-sensitive structure, an isolation layer and a wide-angle matching layer. The application adopts three layers of wide-angle matching structures with different shapes along the E plane and the H plane of the antenna, can improve the impedance matching conditions in two scanning directions according to different impedance change rules when the tight-coupling array is scanned along the E plane and the H plane, and realizes a lower active standing wave under a large scanning angle.

The location of the mobile device is estimated using angle-based positioning measurements. These measurements are generated using transmit (Tx) or receive (Rx) beams from one or more base stations generating beams over an ultra-wide bandwidth that introduces frequency and spatial distortion and attenuation in the array gain response. Variations in the array gain distribution as a function of angle and frequency for the set of beam weights used in beamforming are transmitted to indicate frequency and spatial distortion. The array gain distribution variation for a subband that serves as a portion of the allocated bandwidth for the base station can be provided to the mobile device in auxiliary data, or an aggregation of array gain distribution variations for multiple subbands of the allocated bandwidth can be provided to the mobile device to reduce the burden on signaling.

The invention belongs to the technical field of wireless communication, and discloses an airborne ultra-wideband wide-angle scanning phased-array antenna, which comprises three dielectric substrates, four front and back radiation patches, four microstrip feeder lines and two resistors, wherein the dielectric substrate comprises a middle F4BME217 dielectric substrate and two double-side FR4 dielectric substrates; the overall dimension of the antenna unit is 17.6 mm * 17.6 mm * 88 mm. According to the designed antenna unit, the beam width is improved in a mode of loading the dielectric plates on the two sides, and the wide beam of four concerned frequency points is realized in a mode of 8 * 16 arrays. According to the designed antenna unit, the influence of the scanning angle on array standing waves is improved by loading the dielectric plates on the two sides, and the active VSWR of the array is smaller than 3 under the condition that the scanning angle is + / -45 degrees on the azimuth plane of 0.84-6.7 GHz (the relative bandwidth is 155%) in a 8 * 16 array forming mode. The designed antenna is simple in structure and easy to process, and the common FR4 dielectric plate and the F4BME217 dielectric plate are adopted, so that the cost is low.

Methods and systems for communication technology in which a fifth generation (5G) communication system supporting a higher data transfer rate after a fourth generation (4G) system is converged with Internet of Things (IoT) technology are provided. A method performed by a terminal in a wireless communication system includes receiving, from a base station, a radio resource control (RRC) message including a configuration of at least one frequency band and a configuration of a primary frequency band for the terminal, wherein the configuration of the at least one frequency band includes at least one of a subcarrier spacing, a cyclic prefix, and information on a frequency domain location and a bandwidth of the at least one frequency band; monitoring a control channel on the primary frequency band from the base station; and receiving, from the base station, a downlink control information indicating an active frequency band among the at least one frequency band based on the control channel.

The invention discloses a satellite-borne high-interception-probability high-precision positioning system and method. The system comprises an ultra-wideband wide-angle scanning main array, a plurality of ultra-wideband reconfigurable digital auxiliary arrays, an ultra-large instantaneous bandwidth measurement module, a wideband frequency conversion and high-resolution acquisition module, a reconstruction control module and a high-precision positioning processing module. According to the invention, S-Ku instantaneous full-band reconnaissance processing and high-precision positioning are realized, and burdens of a transmission bus and computing processing resources are greatly reduced. The method is suitable for a comprehensive multifunctional software-defined satellite load system, ultra-large instantaneous bandwidth and ultra-high interception probability receiving in an electronic reconnaissance task are achieved, and high-precision direction finding and positioning are carried out on a target. The transmission bus pressure and the calculation complexity of rear-end high-performance processing equipment are effectively reduced, the C-SWaP performance is improved, and the method has important military significance and economic value.

The invention provides an ultra-wideband wide-beam dielectric resonant antenna based on stereo lithography, and belongs to the field of antenna design, the ultra-wideband wide-beam dielectric resonant antenna comprises a double-layer PCB structure and a dielectric resonator, the double-layer PCB structure comprises a first upper surface clad copper (4), a second upper surface clad copper (5), a lower surface clad copper (3) and a dielectric substrate (2); the dielectric resonator structure comprises a ceramic dielectric block (1), a first slot (6) and a second slot (7); the first and second upper surface copper clad layers are positioned on the upper surface of the dielectric substrate and are microstrip lines; the lower surface coated copper is a ground plane corresponding to the microstrip line, and a gap is reserved between the ground plane and the dielectric resonator; the ceramic dielectric block is provided with a first slot and a second slot, the two slots are equal in size, the first slot is located above the dielectric resonator, and the second slot is located below the dielectric resonator. According to the invention, through the stereo lithography additive manufacturing technology, the complex structure shaping of the dielectric material can be realized, and the impedance bandwidth of the ultra-wideband is realized.

The application discloses a kind of spaceborne high-interception-probability high-precision positioning system and method, system includes ultra-wideband wide-angle scanning main array, multiple ultra-wideband reconfigurable digitization auxiliary array, super large instantaneous bandwidth measurement module, wideband frequency conversion and high-resolution acquisition module, reconfiguration control module and high-precision positioning processing module.The application realizes S~Ku instantaneous full-band reconnaissance processing and high-precision positioning, and greatly reduces the burden of transmission bus and computing processing resource.The application is suitable for comprehensive multi-functional software-defined satellite payload system, realizes ultra-large instantaneous bandwidth and super-high-interception-probability reception in electronic reconnaissance task, and carries out high-precision direction finding positioning to target.Effective reduction of the transmission bus pressure and computational complexity of back-end high-performance processing equipment improves C-SWaP performance, and has important military significance and economic value.

An apparatus for communication is disclosed. An example apparatus for transmission may include: a plurality of digital-to-analog converters configured to digital-to-analog convert a plurality of digital baseband processing subband signals separated from an entire ultra-wide bandwidth signal, respectively; a plurality of digital up-converters configured to perform up-conversion on the plurality of digital-to-analog conversion sub-band signals, respectively; a plurality of intermediate frequency processors configured to perform intermediate frequency processing on the plurality of up-conversion sub-band signals, respectively; an aggregator configured to aggregate the plurality of intermediate frequency processed sub-band signals into an aggregated signal of the entire ultra-wide bandwidth; and a radio frequency chain configured to process the aggregated signal.

To provide an antenna which is small-sized and has a high degree of freedom in design and can cover an ultra-wide band.SOLUTION: An antenna operating from a first frequency to a second frequency, the antenna comprising a first radiating element, a second radiating element, a ground, and a feed portion, wherein the ground is at least coplanar with the first radiating element, and the first radiating element is a planar conductor and comprises a first contact point and a second contact point in contact with the second radiating element, the second radiation element is a linear conductor branching from the feeding portion and has a first region from the first contact point to the feeding portion and a second region from the feeding portion to the second contact point, each of the first region and the second region is shorter than a quarter wavelength of the first frequency, and a separation distance between the ground and the first radiation element on the same plane is shorter than the quarter wavelength of the first frequency.SELECTED DRAWING: Figure 1

The invention discloses a laser local oscillation device realized by using an optical frequency comb and a photoelectric phase-locked loop, and belongs to the technical field of information transmission and processing. The device comprises a radio frequency module, an optical frequency comb generation module, a photoelectric phase-locked loop and a frequency control module, can perform radio frequency signal modulation with fixed frequency on input laser, and outputs comb-shaped frequency spectrum laser with fixed frequency intervals to enter the photoelectric phase-locked loop; by setting the parameters of the photoelectric phase-locked loop, the frequency corresponding to the specified comb teeth in the optical frequency comb can be locked, the interference of other comb teeth can be filtered out, and the local oscillation laser taking the radio frequency signal as the step can be output. According to the invention, ultrahigh-frequency, ultra-wide-bandwidth and large-frequency stepping local oscillation laser can be output. The system has the advantages of simplicity in implementation, high response speed, high integration degree, low resource consumption and the like, and is an important improvement on the prior art.

Aspects presented herein can improve power control of a communication device in an ultra-wide bandwidth beamforming system. Aspects presented herein can enable the communication device to adjust one or more parameters of a power control loop based on a sub-band used within a BWP or based on a channel used within a channelized frequency band. In one aspect, a UE receives at least one power control parameter for transmitting one of a first PUSCH, a first PUCCH, or a first SRS to a base station. The UE transmits the one of the first PUSCH, the first PUCCH, or the first SRS at a first power based on a first sub-band within a BWP.

Architectures of millimeter wave fully-integrated frequency-division duplex (FDD) transmitting-receiving (T / R) front-end (FE) modules include a duplexer (DUX), power amplifier (PA), and low noise amplifier (LNA) on a single semiconductor substrate to facilitate the development of system on a chip (SoC) for millimeter wave 5G wireless and next-generation communications applications. The entire balanced DUX module implements TX signals in differential mode, and RX signals in single-ended mode. LNA input is located at the center of a symmetrical plane of the entire FE module, resulting in an inherent ultra-high isolation between the differential PA output ports and the LNA input port across a ultra-wide bandwidth. The DUX can stand alone as a single unit in a system and is used together with external PA and LNA provided in the system, or it can include its own internal PA and LNA to form a DUX FE module.

The invention discloses a cobalt / cobalt oxide / reduced graphene oxide composite material, a preparation method thereof, and a microwave absorber, relating to the technical field of microwave absorption materials. The cobalt / cobalt oxide / reduced graphene oxide composite material comprises microspheres and a shell coated on the surface of the microspheres. Among them, the material of the microspheres comprises cobalt and cobalt oxide, and the material of the shell comprises cobalt, cobalt oxide, and reduced graphene oxide. By compounding cobalt, cobalt oxide, and RGO to form the core-shell structure, the impedance matching and attenuation ability can be effectively adjusted. Through the synergistic effect of dielectric loss and magnetic loss, a composite material with strong reflection loss and an ultra-wide bandwidth covering the entire X-band is obtained, enabling it to be used as a low-frequency microwave absorber and applicable to aspects such as radar stealth.

The utility model relates to the field of transmitting and receiving circuits, and discloses an ultra-wideband multi-channel transmitting and receiving module. According to the invention, through ingenious combination of power division, synthesis, switch switching and power-off control, four-path receiving and four-path transmitting work can be integrated under the condition of extremely small size. And the antenna port adopts a high-power GaN switch to carry out transceiving switching. Meanwhile, the receiving branch and the transmitting branch are additionally provided with turn-off switches, receiving can be turned off during transmitting, transmitting can be turned off during receiving, and transmitting and receiving isolation is high. The frequency band covered by the product is very wide, and the circuit adopts an ultra-wide-band broadband equalization optimization circuit, so that the full-band 2-18GHz receiving gain fluctuation is very small. The transmitting circuit and the receiving circuit are respectively provided with a switch matrix, input and output ports can be freely switched and correspond in a 2 * 4 mode, and using and multiplexing are convenient. The two transmitting input ports can be switched to four antenna port outputs at will. And the four antenna input ports can be randomly switched to two receiving ports for output.

The present invention belongs to the field of photonic integrated chips, and more specifically, relates to a broadband on-chip beam combining device, an active in-band beam combining device and an ultra-wideband beam combining device composed of Mach-Zehnder interferometers. The device consists of multiple input ports, with a part for long wavelengths and a part for short wavelengths. The input optical wavelength can be any wavelength within the bandwidth range of the multimode interference coupler. By energizing the heating arm of the active in-band beam combining device, push-pull output can be achieved. The ultra-wideband beam combining device has high power, low loss and large bandwidth, and can achieve on-chip beam combining with a wavelength interval of several thousand nanometers. The broadband on-chip beam combining device provided by the present invention has high power, low loss and large bandwidth, can achieve beam combining with a wavelength interval of several thousand nanometers, has push-pull output, and is compact in structure and small in area.

The invention discloses an ultra-wideband low-profile tight coupling transverse connection dipole phased array, and belongs to the technical field of antennas. According to the dipole phased array, the broadband characteristic is achieved through the transversely-connected dipole units, and the coaxial line-to-microstrip line serves as a feed structure; the adjacent dipoles are coupled through grooves, so that the low-frequency bandwidth is further expanded; the metasurface is used as a wide-angle matching layer, the high-frequency bandwidth is further widened, and the scanning range is widened; the finally formed dipole phased-array antenna realizes excellent performance of ultra wide band, wide scanning angle and low profile.

The invention discloses a polarization-sensitive wide-angle matching structure and an ultra-wideband wide-sweep-angle low-standing-wave tight coupling antenna. The polarization sensitive wide-angle matching structure comprises a first polarization sensitive structure dielectric substrate, a first polarization sensitive structure, a second polarization sensitive structure dielectric substrate, a second polarization sensitive structure, a third polarization sensitive structure, an isolation layer and a wide-angle matching layer; three layers of wide-angle matching structures with different shapes along the E surface and the H surface of the antenna are adopted, the impedance matching condition in two scanning directions can be improved in a targeted mode according to different impedance change rules when a tight coupling array scans along the E surface and the H surface, and low active standing waves are achieved under the large scanning angle.

The application provides a kind of based on stereolithography ultra-wide bandwidth beam medium resonant antenna, belong to antenna design field, including double-layer PCB structure and medium resonator, wherein, double-layer PCB structure includes first upper surface copper clad (4), second upper surface copper clad (5), lower surface copper clad (3), medium substrate (2);Medium resonator structure includes ceramic medium block (1), first slot (6), second slot (7);First, second upper surface copper clad is located on the upper surface of medium substrate, and first, second upper surface copper clad is microstrip line;Lower surface copper clad is the ground plane corresponding to microstrip line, and ground plane has gap with medium resonator;Ceramic medium block has first and second slot, and two slots are equal in size, wherein, first slot is located above medium resonator, and second slot is located below medium resonator.The application can realize complex structure of medium material conformal coating by stereolithography additive manufacturing technology, and realize the impedance bandwidth of ultra-wide band.

Architectures of millimeter wave fully-integrated frequency-division duplex (FDD) transmitting-receiving (T / R) front-end (FE) modules include a duplexer (DUX), power amplifier (PA), and low noise amplifier (LNA) on a single semiconductor substrate to facilitate the development of system on a chip (SoC) for millimeter wave 5G wireless and next-generation communications applications. The entire balanced DUX module implements TX signals in differential mode, and RX signals in single-ended mode. LNA input is located at the center of a symmetrical plane of the entire FE module, resulting in an inherent ultra-high isolation between the differential PA output ports and the LNA input port across a ultra-wide bandwidth. The DUX can stand alone as a single unit in a system and is used together with external PA and LNA provided in the system, or it can include its own internal PA and LNA to form a DUX FE module.

The utility model provides an ultra-wide bandwidth dual-frequency combiner. The ultra-wide bandwidth dual-frequency combiner comprises a main shell, a high-frequency band-pass assembly and a low-frequency band-pass assembly. The main shell is provided with a high-frequency resonant cavity and a low-frequency resonant cavity, the two components are adjacently arranged, and the resonant cavities are communicated at the combined output end. The low-frequency band-pass component comprises a band-shaped main body, a 90-degree bent three-section band-shaped bent part and a plurality of resonance branches, two ends of the band-shaped main body are respectively connected with a low-frequency input end and a combined output end, the bent part extends a transmission path to adjust equivalent inductance, and compared with a traditional linear structure, the filter network parameters can be flexibly optimized; resonance branches of different areas expand the out-of-band suppression range, and the filtering characteristic is improved. Wherein the passband of the high-frequency band-pass assembly is 4800-5000MHz, the passband of the low-frequency assembly is 700-3700MHz, and the high-frequency band-pass assembly and the low-frequency assembly realize ultra-wide-band low-pass and high-pass dual-frequency signal efficient combination transmission through a combination output end.

A synthesizer includes a first resonator mirror, a second resonator mirror, and a gain medium disposed within a laser resonator cavity defined by the first resonator mirror and the second resonator mirror. The synthesizer includes a saturable absorber operationally coupled to the gain medium and having active control such that the saturable absorber is configured to generate a waveform via an injection locking signal to create a mode locking effect, the waveform having a frequency comb defined by dimensions of the gain medium. The synthesizer also includes a crystal electro-optical modulator disposed within the laser resonator cavity. The waveform passes through the modulator to impinge on a photodiode to output an emission RF waveform. Changing the voltage applied to the modulator changes the index of refraction of the modulator, altering an optical path length of the laser resonator cavity to adjust a frequency of the emission RF waveform.

The application discloses a kind of millimeter wave injection locking tripler, including two parts of harmonic generator and injection locking oscillator.Harmonic generator is used to generate harmonic signal, and injection locking oscillator is used to lock the harmonic generated by harmonic generator, and harmonic generator is connected with injection locking oscillator by transformer coupling.Compared with the structure of conventional frequency multiplier, the application still has a wide locking range when the input power is small, and has the advantages of ultra-wide bandwidth, low input sensitivity, low power consumption, high integration and the like.

The invention discloses an overcurrent protection circuit, which comprises a first synchronous rectification circuit, a second synchronous rectification circuit and a control circuit, and is characterized in that the first synchronous rectification circuit is connected with a primary side of a transformer of an LLC bidirectional direct current conversion circuit and is used for detecting a first signal of the primary side; the second synchronous rectification circuit is connected with the secondary side of the transformer of the LLC bidirectional DC conversion circuit and is used for detecting a second signal of the secondary side; the control circuit is configured to turn off the LLC bidirectional DC conversion circuit when the first signal exceeds a first preset value and / or the second signal exceeds a second preset value. According to the over-current protection circuit provided by the invention, the circuit can be turned off in time when the signal exceeds the preset value, so that over-current protection of the LLC bidirectional direct-current conversion circuit is realized. Besides, as the frequency of the signal generated by the synchronous rectification circuit is usually low, a high-speed and ultra-wideband operational amplifier and a comparator are not needed, the device cost is low, and the cost is saved.