474 results about "Frequency selection" patented technology

A system for material detection and identification including: an RF transmitter configured for transmitting into an environment an RF signal at a first resonance frequency for a target material, wherein the first resonance frequency is obtained from a material database associating each of a plurality of materials with one or more corresponding resonance frequencies; an RF receiver configured for receiving a resultant response signal from the environment; and a processor configured for: analyzing the resultant response signal for resonance characteristics that indicate a presence of the target material, wherein analyzing includes, if the resonance characteristics are detected and no other material in the material database shares similar resonance characteristics for the first resonance frequency, reporting to a user that the target material has been identified.

The invention discloses an ultra-wideband RCS (radar cross section) reduction metasurface with mixed wave absorption and diffuse scattering and a wave-transparent window, and belongs to the technical field of electromagnetic metamaterials. The metasurface adopts a four-layer cascade structure and comprises a first layer of polarization conversion structure, a second layer of 2.5 D lossy structure, a third layer of Jerusalem cross-shaped lossy structure and a fourth layer of frequency selective surface structure. By loading a lumped resistor at a specific position and adopting a metal through hole interconnection technology, dual functions of radar cross section reduction in a 1-20GHz ultra-wideband and low insertion loss wave transmission in a 8-12GHz frequency band are realized. The structure of each layer adopts a highly symmetrical design and has the characteristic of polarization insensitivity, and meanwhile, by optimizing interlayer air gaps and dielectric material selection, the structure compactness is realized on the premise of ensuring the performance. The method has important application value in the aspect of integration of stealth equipment and a communication system.

A transmitter system comprises a mapper configured to map data bits and power information to multiple subcarriers, producing mapped information. A first-level modulator converts this mapped information into subcarrier specifications, each defined by a complex number indicating amplitude and phase. The system includes multiple data stream / power channel digital paths, each with a frequency selector that processes a portion of the subcarrier specifications. An orthogonal subcarrier generator translates these specifications from frequency to time domain, generating baseband real and imaginary signals. A second-level modulator processes these signals with intermediate-frequency sine and cosine waves to produce IF I and IF Q signals. A beamformer modifies the phase and / or amplitude of these signals across multiple antenna channels, creating directed signals. Finally, a combiner adds output signals from each data stream / power channel digital path, directing them to corresponding antenna channel modules, facilitating efficient transmission across multiple channels.

The invention discloses a broadband low-power-consumption receiving and transmitting shared phase shifter which comprises a differential signal common port, a frequency sampling and control circuit, a dual-mode orthogonal generation circuit and a passive vector modulation synthesis circuit. The differential signal common port comprises a common input / output port interface of RF + and RF-differential radio frequency signals; the frequency sampling and control circuit is composed of a frequency sampling circuit, a frequency detection circuit and a logic control unit. The dual-mode orthogonal generation circuit is composed of a frequency selection change-over switch, a multi-phase filter, a coupling transformer, a matching network 1 and a matching network 2. The passive vector modulation synthesis circuit is composed of two passive vector modulation arrays and two combining / power dividing circuits.

The invention relates to the technical field of wireless electric energy transmission, in particular to a wireless charger transmission efficiency optimization method and system, and the method comprises the following steps: collecting frequency current fluctuation, extracting stable frequency, monitoring direction change, switching a transmission path, and improving the transmission efficiency. According to the invention, precision judgment is carried out on the basis of dynamic identification of frequency point fluctuation characteristics, automatic extraction of stable frequency is realized in combination with a fluctuation decreasing trend, time sequence monitoring of main path current polarity change is matched, a section with maximum direction change fluctuation is identified, and a path path is reset in time. The active response capability to an unstable transmission state is improved, the accuracy and timeliness of a path switching condition are enhanced by depending on a dual judgment mechanism of frequency and current data, energy loss caused by abnormal main path direction is effectively reduced, the continuity of a path replacement process and the stability of current output are improved, and the reliability of path switching is improved. And the data closed-loop regulation effect in the frequency selection and path updating process is enhanced.

The invention provides a broadband absorption and transmission integrated frequency selective surface with a high selection characteristic, which comprises a first loss layer, a second loss layer and a frequency selection layer, and is characterized in that the first loss layer and the second loss layer realize a transmission band with the high selection characteristic and the broadband characteristic at the same time by using dual-order resonance; the second loss layer and the frequency selection layer are cascaded to realize the absorption and transmission integrated characteristic, and the first loss layer is used for improving the low-frequency and high-frequency wave absorption characteristics and expanding the wave absorption bandwidth. Under the combined action of the first loss layer, the second loss layer and the frequency selection layer, wave transmission within the frequency band of 7.72-11.89 GHz and wave absorption within the frequency band of 1.96-7.12 GHz and the frequency band of 12.95-17.33 GHz are achieved. The antenna has high selection characteristics and broadband characteristics, can effectively suppress interference of external electromagnetic waves of other frequency bands or electromagnetic waves of a frequency band close to a communication frequency band on communication, can reduce the radar cross section of a target, and facilitates target stealth.

The invention discloses a new energy box-type substation state abnormity diagnosis method and system, and relates to the technical field of power equipment monitoring. According to the method and the system, through event-triggered high sampling and cross-channel time base self-inspection, multi-source sequence synchronization is ensured, and a consistent time axis is provided for subsequent estimation, so that online analysis under the condition of no power outage is supported; introducing dual-path estimation of RL step fitting and voltage drop robust regression in a transient stage, cooperatively inhibiting a closing peak and outlier data, and obtaining a stable initial value of the contact resistance; in a steady-state stage, adopting Goertzel frequency selection to extract a fundamental wave phasor and performing ohmic purity judgment, and expanding to a resistance-inductance joint model when necessary to remove interference of parasitic inductive reactance on resistance estimation; and then mutual identification and residual constraint are carried out on the temperature and electric power coupling relationship by using a discrete heat RC model, and local write-back correction is carried out on the deviation, so that the consistent closed loop of the electric domain and the heat domain is realized.

The utility model provides a waveguide antenna structure with a frequency selective surface structure and a waveguide radar, and the structure comprises a waveguide antenna which is provided with a waveguide slot array and a frequency selective surface structure; the waveguide slot array is arranged on the waveguide antenna in a penetrating manner, and the frequency selective surface structures are distributed on the peripheral side of the waveguide antenna; the frequency selective surface structure comprises surface structure units, and the frequency selective surface structure is formed by arranging a plurality of surface structure units. According to the utility model, the frequency selective surface structure absorbs reflection between the top surface of the antenna and the antenna housing and reduces distortion of a directional diagram; surface waves can be reduced, space coupling between the antennas is reduced, and the isolation between the antennas is improved; the beam directivity can be adjusted, and beam performance specific directivity can be shaped.

The embodiment of the invention provides a frequency selective surface agile design method and device based on a multi-scale convolutional neural network, a storage medium and electronic equipment, and relates to the field of frequency selective surface design, and the method comprises the steps: carrying out the electromagnetic simulation of a frequency selective surface structure, constructing a data set containing the corresponding relation between the geometric parameters and the electromagnetic response; based on the data set, adopting a multi-scale convolutional neural network to extract multi-scale features of the electromagnetic response of the frequency selective surface structure, performing feature fusion processing, and outputting to obtain an electromagnetic response prediction result; and performing iterative calculation on the electromagnetic response prediction result by using a particle swarm optimization algorithm until the electromagnetic response prediction result meets a given electromagnetic performance target of the frequency selective surface. According to the technical scheme, complex frequency selective surface multi-target design requirements of multiband, broadband, large-angle stability, multi-polarization and the like can be effectively met, and the limitation of a traditional method is broken through.

The utility model discloses a discharge detection device for a dry-type transformer, and the device comprises a sound collection module which is used for collecting sound signals generated during the discharge of the dry-type transformer; the audio pre-amplification module is connected with the sound collection module and is used for carrying out primary amplification on the sound signal to obtain a first sound signal; the frequency selection module is connected with the audio pre-amplification module and is used for screening the frequency of the first sound signal to obtain a second sound signal; the audio amplification module is connected with the frequency selection module and is used for carrying out secondary amplification on the second sound signal to obtain a third sound signal; and the audio output module is connected with the audio amplification module and is used for outputting the third sound signal. According to the utility model, the sound collection module is arranged to collect sound during operation of the transformer, the audio pre-amplification module and the audio amplification module are adopted to amplify the sound to a frequency band which can be heard by people, the sound is output through the audio output module, and an operator hears the sound to judge the discharge condition of the transformer.

The utility model discloses a plate-cavity coupling resonance acoustic metamaterial sound insulation structure which comprises a resonance plate and a cavity layer connected with the resonance plate, the side portion and one end portion of the cavity layer are closed, the other end of the cavity layer is open and connected with the resonance plate, and a narrow slit is formed in the resonance plate. A suspension part capable of freely vibrating is formed in a hollow-out and enclosed area of the resonance plate by the narrow slits; according to the utility model, the problems of narrow sound insulation frequency selection range and complex structure size regulation and control of the existing plate-cavity coupling structure are solved.

This invention discloses a harmonic suppression control method for a resonant-cascaded active disturbance rejection permanent magnet linear motor (PMLM) based on a positioning force model, belonging to the field of PMLM control technology. Addressing the problems of incomplete periodic harmonic suppression, poor robustness to unknown disturbances, and insufficient synergy between resonance and active disturbance rejection, this invention embeds the positioning force model into the state-space equation of the active disturbance rejection controller and embeds the resonant controller into the second-stage observation channel of a two-stage extended state observer, constructing a three-layer collaborative architecture of model feedforward compensation, resonant frequency selection suppression, and extended state observer broadband estimation. The positioning force model actively compensates for known harmonic disturbances, the embedded resonant controller accurately suppresses residual periodic components, and the extended state observer compensates for nonlinear and aperiodic disturbances in real time. This invention achieves full-link collaborative suppression of positioning force harmonics, inductor asymmetry harmonics, and unknown disturbances in PMLMs under low-speed, high-speed, and variable-speed conditions, significantly reducing current harmonics and improving system stability and control accuracy. Simulation results show that this control method can achieve high-precision servo control of PMLMs.

The invention belongs to the technical field of microwave antennas, and particularly provides a tight coupling phased array with a tail end unit loaded with asymmetric dipoles. The main structure of the antenna comprises a radiation structure (I) which is composed of frequency selection surfaces which are arranged above folded dipoles and are periodically arranged, dipoles which are symmetrically arranged in a central unit and dipoles which are asymmetrically arranged in an edge unit; and the feed structure II is composed of a gradient microstrip feeder line, a metal floor and a coaxial line. According to the invention, a frequency selective surface is loaded above a folded dipole, a traditional tight coupling phased array is replaced, a heavy dielectric layer is loaded above the dipole, and a 1 * 8 one-dimensional linear array is designed. Besides, by prolonging the length of the folded dipole on the tail end array element, compared with a traditional structure, extra capacitance is introduced under the condition that the height of the array section is not changed, and the problem that the array is difficult to match at low frequency is effectively relieved.

The application discloses a kind of multilayer double-channel substrate integrated waveguide filters, belong to microwave communication technical field, including sequentially stacked multiple SIW cavities, the second metal substrate of top layer SIW cavity is equipped with first direction slot gap;The first metal substrate of bottom layer SIW cavity is equipped with second direction slot gap;In intermediate SIW cavity: the first metal substrate of second layer SIW cavity is equipped with first direction slot gap, the second metal substrate of penultimate layer SIW cavity is equipped with second direction slot gap, and the rest metal substrate is all equipped with the cross slot gap combined into by first direction slot gap and second direction slot gap;First direction slot gap and second direction slot gap are aligned with cross slot gap;Filter first channel includes first input port, all first direction slot gap and first output port;Filter second channel includes second input port, all second direction slot gap and second output port.The application shows good frequency selection characteristic and high channel isolation.

The invention specifically discloses an MUF prediction system and method based on multi-source ionosphere data driving, and relates to the technical field of short-wave communication. The system comprises a parameter input module, an MUF calculation module and a result output and visualization module. According to the method, key ionosphere parameters are predicted through a CNN-BiGRU-SA model, an input module and a calculation module of VOACAP are reconstructed, parallel input and MUF calculation of multi-source ionosphere data are achieved, and comparative analysis and visual display are conducted on results. According to the method, the problems that in an existing MUF prediction method, a deep learning model greatly depends on historical data of a specific link, and VOACAP prediction precision is limited by a built-in ionosphere statistical model are effectively solved, the accuracy and stability of MUF prediction are remarkably improved, and reliable support is provided for short-wave communication frequency selection.

This application provides a method, apparatus, device, and medium for determining the characteristic frequencies of dynamic response data of rail vehicles, relating to the field of rail vehicle technology. The method determines the resonant frequency band in the dynamic response based on the known excitation frequency of the operating line, and separates the dynamic response data according to the energy change rate of the resonant frequency band to obtain vehicle vibration response data, thereby determining the characteristic frequencies of target vehicle components. This overcomes the problems of existing technologies where fixed-band filtering cannot adapt to the differences in excitation characteristics of different lines, easily leads to insufficient interference filtering or over-filtering that mistakenly deletes effective information, and manual frequency selection relies on experience, is inefficient, and has subjective judgment errors, making it difficult to adapt to scenarios with large changes in rail vehicle speed and complex operating conditions. It can accurately eliminate line excitation interference, accurately extract the characteristic frequencies of vehicle components, and improve the accuracy and reliability of characteristic frequency identification.

The invention discloses a frequency selection absorber design method based on cross-layer electromagnetic function decoupling mapping and cross-layer coupling electromagnetic network abstraction, which comprises the following steps: decoupling and mapping wave absorbing and wave transmitting function requirements to a set space region of a double-layer structure through cross-layer electromagnetic function decoupling mapping, forming a physical structure comprising an edge loss region, a central resonance region, a middle coupling region and a system wave-transparent resonance region; abstracting the physical structure into a unified model comprising a composite RLC integrated network, a band-pass resonance network and a coupling network through cross-layer coupling electromagnetic network abstraction; carrying out collaborative optimization on model parameters of the unified model so as to realize path collaborative control of electromagnetic energy of the frequency selection absorber under frequency band selection; and meanwhile, the ultra-thinness and robustness of the structure are realized. According to the invention, an integrated design normal form for solving functional contradictions in principle is adopted, and the inherent contradiction between broadband wave absorption and extremely low loss wave transmission is solved.

The invention relates to a high-temperature-resistant Si3N4-based wave-absorbing material based on FSS and a preparation method thereof. The high-temperature-resistant Si3N4-based wave-absorbing material based on the FSS comprises a frequency selective surface layer, a porous silicon nitride dielectric layer and a metal substrate which are sequentially stacked from top to bottom, the frequency selective surface layer is composed of M * N FSS units which are periodically arranged in a two-dimensional plane and are in a Jerusalem cross pattern, M is larger than or equal to 8, and N is larger than or equal to 8. The high-temperature-resistant Si3N4-based wave-absorbing material based on the FSS provided by the invention can realize effective absorption of C-Ku wave band electromagnetic waves, has the characteristics of thin thickness, low reflectivity, high strength, high temperature resistance, light weight and wide frequency band, and can realize the purpose that the high-temperature-resistant Si3N4-based wave-absorbing material can be used for absorbing high-temperature-resistant Si3N4-based wave-absorbing material in a complex and severe physical environment with relatively small physical burden. And efficient, reliable and lasting absorption of broadband electromagnetic waves is realized.

The application belongs to the technical field of electromagnetic materials, and provides a design method and system of a conical surface tunable frequency selective surface with stable performance. According to the performance evolution law of the FSS under the conical surface conformal transformation, the FSS period shape and arrangement mode are determined. Whether the geometric parameter value of the optimized conical surface tunable frequency selective surface structure meets the set target IL value is judged. If the geometric parameter value of the optimized conical surface tunable frequency selective surface structure does not meet the set target IL value, the geometric parameter value of the conical surface tunable frequency selective surface structure is redesigned according to the insertion loss improvement strategy. The proposed curved surface TFSS design process has low IL, high conformality and wide angle domain stability.

The invention discloses a parallel port type hexagonal frequency mixing solid-state transformer and a regulation and control method and device thereof, and the method comprises the steps: under the conditions that the direct-current active power and the alternating-current active power of the solid-state transformer are equal, and the instantaneous active power absorbed by each sub-bridge arm is 0, calculating the frequency of each sub-bridge arm in each sub-bridge arm; the stability relation between the fundamental frequency alternating current port current distribution coefficient and the intermediate frequency alternating current port current distribution coefficient is determined; and calculating a bridge arm circulation current through the stability relationship, thereby calculating to obtain a bridge arm circulation voltage reference value, calculating to obtain a sub-module capacitor voltage reference value of each sub-bridge arm, superposing each sub-module capacitor voltage correction component of each sub-bridge arm, obtaining a corresponding optimized sub-module capacitor voltage, and generating a corresponding modulation signal. By the adoption of the technical scheme, the multi-scene access requirement of the alternating current and direct current hybrid power distribution network is met, and inherent decoupling of three-frequency components including direct current, fundamental frequency and intermediate frequency can be achieved without an additional frequency selection network under the corresponding control method.

The application discloses an electronic tuning type multifunctional sensor and a preparation method thereof. The sensor comprises a quartz crystal, a composite electrode and an oscillation circuit; the first end of the composite electrode is connected with the first end of the oscillation circuit, the second end of the oscillation circuit is connected with the first end of the quartz crystal, the second end of the quartz crystal is connected with the second end of the composite electrode, and the second end of the oscillation circuit is an output end. The composite electrode comprises a substrate, a planar inductive microelectrode and a planar capacitive microelectrode which are arranged on two sides and are connected in series through a via hole; a nano-magnetic iron oxide film is deposited on the inductive side, a hydroxylated ultra-high specific surface area disordered porous carbon film is deposited on the capacitive side, and a perfluorosulfonic acid protective layer is coated on the surfaces of the two films. The application forms a frequency selection network by connecting the double-sided electrode and the quartz crystal in series, and outputs an anti-interference frequency signal; the protective layer is insulated and prevents short circuit on the inductive side, and improves the humidity response on the capacitive side; manual overturning can switch the detection of metal damage, non-metal defects and environmental humidity, and the sensor has the advantages of high stability and low cost.

The application discloses a multi-mode absorbing frequency selective surface with adjustable wave absorbing capacity, which comprises a metal pattern layer, a first dielectric substrate, a metal back plate, a second dielectric substrate and a metal feed line layer arranged in sequence from top to bottom, wherein the metal pattern layer comprises a plurality of metal unit structures arranged in an array, each metal unit structure comprises a polygonal metal sheet located at the center of the unit, metal bands extending from the periphery of the polygonal metal sheet, and metal arms extending from the four corners of the unit, the metal arms comprise two independent metal structures, the polygonal metal sheet and the metal bands are connected to each other through a first varactor diode, the two independent metal structures are connected to each other through a second varactor diode, and the metal arms in adjacent metal unit structures jointly form a new rotating cross structure. The independent feed line network is built through the metal through hole, so that the structure is divided into two independently regulated parts, and the whole has single and double adjustable wave absorbing modes.

A frequency selector for superconducting parametric amplifiers. According to illustrative embodiments, a frequency selector system for superconducting parametric amplifiers may comprise a Josephson traveling wave parametric amplifier (JTWPA) for producing entangled photon pairs at signal frequency and idler frequency, a resonator electrically connected to the JTWPA for tuning the signal frequency and idler frequency to an application frequency, and an inverse diplexer electrically connected to the resonator for separating the signal frequency and the idler frequency. In some embodiments, a frequency selector system for superconducting parametric amplifiers, comprising a Josephson traveling wave parametric amplifier (JTWPA) for producing entangled photon pairs at signal frequency and idler frequency; a resonator electrically connected to the JTWPA for tuning the signal frequency and idler frequency to an application frequency; and a multiplexer electrically connected to the resonator for separating the signal frequency and the idler frequency.

The utility model relates to the technical field of antenna stealth, specifically relates to a frequency selection unit and frequency selection surface for low frequency range, the frequency selection unit is spliced by first metal layer, second metal layer, third metal layer and fourth metal layer, the first metal layer is formed by MXM square metal patch, wherein 3<=M<=7 and M is odd, second metal layer is spliced by four sub metal layer units and second metal layer is central symmetry structure, the sub metal layer unit is the structure after first metal layer equal proportion reduction to one fourth, third metal layer and first metal layer structure are same and both are in diagonal position, fourth metal layer and second metal layer structure are same and both are in diagonal position, the frequency selection unit structure simple in the utility model can realize the absorption of internal fixed frequency point electromagnetic wave, and the electromagnetic wave of other frequency is completely transparent, can satisfy the frequency selection of antenna, and does not influence the use of antenna itself.

This application belongs to the field of microwave absorber technology, and particularly relates to a frequency-selective microwave absorber. The frequency-selective absorber includes a support layer having a first surface and a second surface disposed opposite to each other; a first dielectric layer bonded to the first surface; a second dielectric layer bonded to the second surface; a loss layer bonded to the side of the first dielectric layer away from the first surface to absorb electromagnetic waves of a preset frequency band; and a transmission layer bonded to the side of the second dielectric layer away from the second surface, allowing electromagnetic waves of the preset frequency band to pass through. The support layer, the first dielectric layer, the second dielectric layer, the loss layer, and the transmission layer are all transparent structures. This application can solve the technical problem in the prior art where frequency-selective absorbers lack optical transparency.

The application discloses a low-complexity frequency scanning LWA DOA estimation method based on a grouping fusion idea. The main beam direction of a leaky-wave antenna can be changed along with the change of a working frequency, so that the coverage of a radio signal is increased, and the energy consumption of equipment is effectively saved. Meanwhile, the application solves the DOA estimation problem of non-coherent signals and strongly correlated signals which can occur in a real scene. Compared with a traditional DOA estimation method, the method does not need array flow vector to be in a Vandermonde form, the calculation amount is greatly reduced compared with projection and other traditional methods, the required matrix dimension is low, and the implementation steps are simple. The method is not only suitable for single / multi-beam frequency scanning leaky-wave antennas, but also has generalizability for all frequency selection antennas.

The application provides a low-frequency antenna, an antenna array and an electronic device. The low-frequency antenna comprises a dielectric substrate and a plurality of radiation units arranged on the dielectric substrate. Each radiation unit comprises a ring-shaped radiation element and a frequency selective surface arranged in the ring-shaped radiation element, and the frequency selective surface and the ring-shaped radiation element are insulated from each other. Each ring-shaped radiation element is provided with a gap. The low-frequency antenna provided by the application has a relatively wide wave transmission characteristic, and can realize relatively independent regulation and control.

In an electronic device and an operating method thereof according to an embodiment, the electronic device may include a communication circuitry supporting short-range wireless communication and neighbor awareness network (NAN) communication; a memory storing at least one computer program; and at least one processor. The at least one computer program may include instructions that cause, when executed by the at least one processor individually or collectively, the electronic device to connect to a first access point (AP) through a non-dynamic frequency selection (non-DFS) channel, transmit, to an external electronic device, a first service discovery frame including information related to a DFS channel and information indicating a maximum bandwidth supportable by the electronic device, in a process of discovering the external electronic device to be connected via an NAN data path (NDP), connect to a second AP supporting the DFS through the DFS channel while maintaining a connection between the first AP and the electronic device, upon identifying, based on a second service discovery frame received from the external electronic device, that the external electronic device supports the DFS and a maximum bandwidth supportable by the external electronic device is greater than a bandwidth of the non-DFS channel, establish the NDP with the external electronic device, based on the first service discovery frame and / or the second service discovery frame, and perform NAN communication with the external electronic device, based on first schedule information related to performing the NAN communication through a frequency band of the non-DFS channel and a frequency band of the DFS channel. The first schedule information may enable the external electronic device and the electronic device to perform the NAN communication through the frequency band of the non-DFS channel and the frequency band of the DFS channel during a first period between discovery windows.

The present application relates to a frequency synthesizer with dynamically selected level shifting of an oscillating output signal. An oscillator circuit powered by a source voltage generates an oscillating output signal. The oscillating output signal is level shifted and applied to a first input of a multiplexer. A second input of the multiplexer receives the oscillating output signal. The multiplexer selects one of the oscillating output signal and the level shifted oscillating output signal to output as a selected oscillating output signal in response to a selection signal. A lock loop circuit controls a frequency of the oscillating output signal based on the selected oscillating output signal and a reference oscillating signal. The selection signal also selects one of the source voltage of the oscillator circuit and a reference voltage as an error amplifier reference voltage for a voltage regulator circuit that generates a first supply voltage.

A highly efficient 5G mobile phone signal jamming system includes one 5G signal receiving link and multiple jamming transmission links. The receiving link performs polling and time-division multiplexing of downlink signals from various 5G frequency bands and GSCN frequency points. The signal receiving link receives downlink signals from airborne 5G base stations and GSCN frequency points via an antenna. After passing through filters, low-noise amplifiers, mixer downconversion, analog-to-digital conversion, and digital downconversion frequency selection, it performs PSS signal detection and determines whether the jamming transmission link should send signal interference SSB blocks. Compared with existing technologies, this invention detects whether there are PSS synchronization signals on 5G frequency bands and GSCN frequency points, and sends interference signals at the corresponding frequency and time of SSB to disrupt the UE's periodic measurement and reporting of SSB, thereby preventing the mobile phone from camping or accessing the 5G system. It greatly reduces the bandwidth and time of sending interference signals, significantly reducing the power consumption and radiation of the 5G signal jamming system.