10 results about "Frequency coverage" patented technology

The present disclosure belongs to the technical field of antennas. Provided are a panel antenna and an electronic device, which can solve the problems of existing panel antennas, such as low aperture efficiency, uneven radiation amplitude, difficulty in achieving multi-frequency coverage. The panel antenna in the present disclosure comprises a waveguide structure, a first dielectric substrate, a radiation layer and a plurality of switch units, wherein the radiation layer has a plurality of slit openings; the switch units are arranged so as to correspond to the slit openings on a one-to-one basis, and are configured to control whether the slit openings corresponding thereto are open / closed; the radiation layer is divided into a middle region and a peripheral region; and the slit openings located in the middle region among the plurality of slit openings are divided into a plurality of groups, each group of said slit openings comprises at least a plurality of first slit openings, at least some of the first slit openings located in different groups have different sizes, and the closer a group of slit openings to the centre of the middle region, the larger the size of the first slit openings in said group of slit openings. The panel antenna in the present disclosure has the advantages of high aperture efficiency, multi-frequency coverage and even radiation amplitude.

The present disclosure provides a flat plate antenna and electronic equipment, which belong to the technical field of antennas, and can solve the problems of low aperture utilization, uneven radiation amplitude and difficulty in realizing multi-frequency coverage of existing flat plate antennas. The flat plate antenna comprises a waveguide structure, a first dielectric substrate, a radiation layer and a plurality of switch units. The radiation layer has a plurality of slit openings. The switch units are arranged one by one corresponding to the slit openings and are configured to control the switch state of the corresponding slit openings. The radiation layer is divided into a middle region and a peripheral region. Part of the plurality of slit openings located in the middle region is divided into a plurality of groups. Each group of slit openings includes at least a plurality of first slit openings. The sizes of the first slit openings located in different groups are different, and the sizes of the first slit openings in the group closer to the center of the middle region are larger. The flat plate antenna has the advantages of high aperture utilization, multi-frequency coverage and uniform radiation amplitude.

The present application relates to the technical field of terahertz spectrum detection, in particular to a kind of directly encoded waveform's atomic terahertz spectrum detection method and device, the detection method uses " direct modulation coding + algorithm reconstruction", the bandwidth of the terahertz frequency domain spectrum obtained overcomes the narrow bandwidth defect of atomic detection, the frequency coverage range of its spectrum is determined by the bandwidth of terahertz modulator, is not limited by the intrinsic narrow bandwidth of atomic detector, realizes the terahertz spectrum fast and efficient detection of more than GHZ bandwidth, can be applied to gas component detection, substance concentration analysis, nondestructive testing and other fields, has good application value.

Tri-state triple band remotely configurable tuning probes for slide screw impedance tuners allow instantaneous larger frequency coverage beyond the capacity of existing tuning probes using the single horizontal and vertical axis mechanism of a prior art single probe, single band tuner. This is done by combining two tuning slugs, a master slug and a slave slug into a configurable tuning probe assembly mounted in the same mobile tuner carriage and controlled using a single vertical axis mechanism. To avoid spurious resonance phenomena the tuning slugs are controlled, driven, and locked vertically sliding on each other, and guided appropriately allowing smooth, uninhibited vertical movement of the metallic bodies.

The application discloses a scanning tunnel microscope device for realizing electron spin resonance detection and relates to the technical field of microscopes. The scanning tunnel microscope device for realizing electron spin resonance detection comprises a base, a needle tip arranged on the base, the needle tip being configured to run and generate a tunneling current with a sample on the base, a microwave excitation component, the microwave excitation component comprising an antenna and a microwave signal generation and modulation structure, the antenna being arranged on the base, and the microwave signal generation and modulation structure being configured to transmit microwave signals to the antenna and / or the needle tip, and a magnet component arranged on the side of the base away from the needle tip. The microwave radiation direction of the antenna is towards the needle tip. The technical scheme of the application is characterized in that the antenna is arranged on one side of the base, and the microwave signal generation and modulation structure is configured to inject microwave signals to the antenna and / or the needle tip, so as to improve the microwave excitation efficiency and frequency coverage capability and significantly improve the stability of the spin resonance signal and the system adaptability.

The present application relates to the technical field of sound barriers, and provides a wide-frequency optimization method and system for a composite sound barrier and a computer, the wide-frequency optimization method comprising: obtaining a cavity shape correction amount, a neck end effective length correction amount and a thermal viscous acoustic resistance, and constructing a resonator parameterization module; obtaining a target frequency band; obtaining a frequency matching degree term, a bandwidth coverage degree term and a structure compactness term, and composing a multi-objective optimization function; based on the resonator parameterization module and the multi-objective optimization function, using a particle swarm optimization algorithm improved by introducing acoustic structure experience rules and feasible solution priority rules to obtain final resonator size data sets; based on the final resonator frequency, determining a labyrinth passage length, and based on the target frequency band, determining a labyrinth passage cross-sectional size, to design a labyrinth phase modulation plate unit; and constructing a composite sound barrier. Through the above method, a composite sound barrier with low-frequency performance, light structure and wide-frequency coverage can be efficiently designed.

Impedance composite muffler, including shell, both ends of the shell are provided with butt joint, the butt joint is provided with first perforated cylinder, the outer side of the first perforated cylinder is covered with first sound-absorbing layer, the outer side of the first sound-absorbing layer is covered with second perforated cylinder, the second perforated cylinder is separated from the shell by cavity, both ends of the first perforated cylinder are provided with auxiliary sound-absorbing structure. Adopt the above structure, wide frequency high efficiency noise reduction, through the aperture change reflects high frequency sound wave, realizes wide frequency coverage, forms three-dimensional sound-absorbing network simultaneously, further disperses sound wave path and enhances attenuation, ensures that sound wave must go around multilayer sound-absorbing layer, improves unit volume noise reduction efficiency, avoids that sound wave directly penetrates gap, enhances airtightness, the whole structure of device is simple, multilayer damping is set to optimize attenuation for different frequency sound waves, forces sound wave to reflect and diffract multiple times, significantly improves sound-absorbing quality.

This invention relates to the field of vibration damper design optimization technology, and in particular to a method and system for optimizing the vibration damping effect of vibration dampers based on finite element analysis. The method includes acquiring vibration frequency data of conductors at high-voltage transmission lines and material dimensional parameters of the vibration damper; creating a three-dimensional vibration damping model based on the material dimensional parameters of the vibration damper; performing finite element analysis on the three-dimensional vibration damping model using the vibration frequency data of the conductors at the high-voltage transmission line site, including vibration damper cell partitioning, modal analysis based on transmission line constraints, and parameter sensitivity analysis based on variance; and outputting key adjustment parameters of the vibration damper based on the analysis results. This scheme, through finite element analysis combined with field vibration data, optimizes the vibration damper to form multiple fixed resonant frequencies, covering key vibration frequency bands. Compared with traditional vibration dampers, it achieves precise resonant frequency matching and a wider coverage range.

This disclosure provides systems, methods and apparatuses for measurement of cells and determination of a non-standalone (NSA) coverage status using an NSA coverage database. The NSA coverage database may indicate candidate frequencies of New Radio (NR) cells that provide NSA coverage corresponding to a given Long Term Evolution (LTE) serving cell. The NSA coverage database may also indicate whether a system information block 1 (SIB1) has been previously received on a candidate frequency. The user equipment (UE) may perform measurement of candidate frequencies using the NSA coverage database, and may identify cases where a cell not providing NSA coverage has a same candidate frequency as a cell providing NSA coverage using the indication of whether SIB1 has been previously received on a candidate frequency.

The utility model discloses a frequency hopping frequency source module based on DDS relates to microwave radio communication technical field, including crystal oscillator, power divider and frequency mixer, and power divider and frequency mixer are connected in parallel through first branch and second branch, and first branch includes FPGA chip, PLL chip, DDS chip and first filter who connects in order series connection, and FPGA chip and power divider first output electric connection, and first filter and frequency mixer first input electric connection, and the second output of FPGA chip and the frequency control input of DDS chip electric connection. The utility model discloses the hardware construction under relevant layout, still makes it have the advantage that the output frequency coverage is wide under the original already having the advantage that the frequency switching speed is fast, and the frequency resolution is high.