439results about How to "High bandwidth" patented technology

The invention belongs to the field of switching chips, and relates to a message processing and transmitting device on a CXL switching chip, which comprises a CXL switching interface unit module, an annular topological network on chip and a CXL management unit module, the CXL switching interface unit module is used for receiving and analyzing messages of two sub-protocols, namely. Cache and. Mem, sent by CXL equipment directly connected to a CXL switching chip, then converting and packaging the messages into a message format conforming to the standard of the network on the circular topology chip, and further transmitting the messages through the network on the circular topology chip; and meanwhile, the CXL switching interface unit module also needs to receive the message from the ring topology network-on-chip, converts and packages the message into a corresponding CXL sub-protocol message format, and then distributes the message to other CXL equipment. The method has the characteristics of high bandwidth, low delay and multi-channel concurrency, and provides an efficient transmission channel for a large amount of memory data access scene; and the method has the advantages of high expandability, friendliness to chip back-end physics and the like.

The invention discloses a computing system, a computing method, computing equipment, a medium and a program product in the technical field of computers. The heterogeneous acceleration card with the built-in Ethernet controller forms the heterogeneous acceleration pool, the heterogeneous acceleration pool is connected with the Ethernet switching module in an Ethernet mode or a remote direct data access mode, and the Ethernet switching module is connected with the computing resource pool; the management core in the computing resource pool can manage the acceleration cards in the at least one heterogeneous acceleration pool and the binding relationship between the computing core and the acceleration cards, and distribute the processing task to the acceleration cards in the at least one heterogeneous acceleration pool, so that the acceleration cards in the at least one heterogeneous acceleration pool cooperatively complete the processing task. Wherein data transmission is accelerated in an Ethernet mode or a remote direct data access mode, so that not only can sufficient computing power support be provided for task operation, but also high bandwidth and low delay can be provided for high-speed communication and large-data-volume transmission of tasks, and rapid and stable operation of model training tasks is facilitated.

The invention relates to the technical field of wireless communication and data transmission, in particular to a data transmission method, system and device based on a portable WiFi network. The method comprises the following steps: acquiring initial multipath channel signal data; performing channel feature extraction on the initial multipath channel signal data to obtain antenna channel feature data; performing phased-array antenna beam calculation on the antenna channel characteristic data to obtain an antenna initial beam directional diagram; performing spatial filter interference suppression on the antenna initial beam directional diagram to obtain antenna optimization beam form data; performing digital beam forming on the antenna optimization beam form data to obtain antenna beam configuration parameters; performing network topology node analysis on the antenna beam configuration parameters to obtain a portable WiFi node distribution diagram; and carrying out improved on-demand routing calculation on the carry-on WiFi node distribution map to obtain an initial routing topological structure. According to the invention, the reliability of portable WiFi network data transmission is improved.

The broadband dual-polarization magnetoelectric dipole antenna comprises a first dielectric layer and a second dielectric layer arranged below the first dielectric layer, and the first dielectric layer and the second dielectric layer are connected through a bonding layer to serve as an antenna substrate for supporting a magnetoelectric dipole unit. The magnetoelectric dipole unit comprises metal patches and magnetic dipoles, the metal patches and the magnetic dipoles are used as electric dipoles and magnetic dipoles, the magnetic dipoles penetrate through the first dielectric layer and are arranged on the lower side of the second dielectric layer, and the four metal patches are annularly and uniformly arranged on the upper side face of the first dielectric layer; the shape of the metal patch is a rectangle with semi-elliptical chamfers on two side edges of the outer edge; any metal patch is coupled with two gain patches arranged on the first dielectric layer, and the gain patches are circular. The problem that in the prior art, a magnetoelectric dipole antenna is poor in impedance bandwidth capacity, and therefore the requirement of people for the network information transmission speed cannot be met is solved.

The invention provides a composite ferrite circulator and electronic equipment, the composite ferrite circulator comprises a first bias magnetic circuit assembly, a ceramic gasket, a composite material substrate and a second bias magnetic circuit assembly which are sequentially arranged along a first direction, and one side, close to the ceramic gasket, of the composite material substrate is provided with a microstrip circuit; one side, close to the second bias magnetic circuit assembly, of the composite material substrate is provided with a grounding metal layer, the composite material substrate comprises a ceramic dielectric substrate, the surface of the ceramic dielectric substrate is provided with a cylindrical ferrite penetrating along the first direction, and the outer side of the cylindrical ferrite is sequentially sleeved with a plurality of circular ring ferrites; the saturation magnetization intensity of the cylindrical ferrite and the saturation magnetization intensity of the circular ferrite are sequentially reduced from inside to outside. According to the scheme, a higher relative bandwidth of the circulator can be realized, and the non-reciprocal transmission performance of the circulator is improved, so that the overall working performance of the electronic equipment is improved.

The invention belongs to the technical field of electrical measurement, and particularly discloses a hundred-kA impact large-current sensing device based on a multi-composite magnetic core material. The device comprises a multi-composite magnetic core framework, a current winding coil, a parallel resistor and a shielding shell, the multi-composite magnetic core framework is formed by compounding at least two magnetic materials, the multi-turn current winding coil is distributed on the multi-composite magnetic core framework, and the two ends of the parallel resistor are connected with the two ends of the current winding coil respectively; the shielding shell is located on the outer side of the composite magnetic core framework. A current conductor to be measured penetrates through the composite magnetic core framework in the axial direction, and the measurement output end of the current winding coil is connected with an output circuit. The technical problem that an existing impact large-current sensing device cannot meet the technical requirements of high-amplitude and high-accuracy impact large-current measurement is solved.

The invention provides a power grid fault diagnosis method and device, a storage medium and equipment. The method comprises the steps that power grid operation parameters of power grid key nodes are acquired through a power grid node sensor; sending the power grid operation parameters to an edge computing node to judge whether the power grid operation parameters are abnormal or not; if the power grid operation parameters are abnormal, marking the power grid operation parameters to be abnormal and then sending the power grid operation parameters to a cloud platform; and the cloud platform classifies the power grid operation parameters marked to be abnormal in combination with historical power grid fault data, and positions the power grid operation parameters marked to be abnormal in combination with a GIS and a GPS to obtain a power grid fault type and position. Through combination of the edge computing node and the cloud platform, power grid fault abnormity is identified, analyzed and diagnosed in stages, rapid fault response to power grid abnormal operation parameters is realized, power grid fault features can be accurately identified and analyzed in combination with a trained model, the power grid fault diagnosis efficiency and accuracy are improved, and the fault diagnosis efficiency and accuracy are improved. Powerful guarantee is provided for safe and stable operation of a power grid.

The invention provides an optical calculation method and system based on on-chip diffractive optical feature extraction and a chip. The method comprises the following steps: loading data of an input end to an input optical signal; performing optical domain preprocessing on the input optical signal to obtain a preprocessed optical signal; the preprocessing mode comprises power distribution, time delay, amplitude and phase adjustment; performing feature extraction calculation on the preprocessed optical signal through an on-chip diffraction optical feature extractor to obtain optical feature information which is output in parallel; the optical characteristic information is transmitted to a receiving end. According to the method, feature extraction and preliminary calculation are carried out in the optical domain, the calculation time is greatly shortened, the high-speed requirement can be met, redundant data can be compressed, the speed, bandwidth and efficiency of the whole calculation system are improved, and the severe bottleneck caused by electronic calculation is solved.

The invention discloses a multi-channel transceiving integrated system based on an RFSOC (Radio Frequency System On Chip) and a radio frequency SIP (Session Initiation Protocol). The multi-channel transceiving integrated system comprises an RFSOC system, a multi-channel clock synchronization module, a radio frequency SIP system and a power supply network, the RFSOC system comprises a control sampling module, a storage module and an optical fiber module, the control sampling module comprises a plurality of RFSOC chips, a CPLD (Complex Programmable Logic Device) chip and a main control chip, and the RFSOC chips are used for processing intermediate frequency signals and realizing data interaction with the optical fiber module; the CPLD chip is used for enabling a power supply network; the main control chip is used for performing control coordination among the plurality of RFSOC chips; the storage module is used for realizing program solidification of the RFSOC system; the optical fiber module is used for realizing high-speed transmission of broadband receiving data; the multi-channel clock synchronization module is used for providing a clock reference of the whole system; the radio frequency SIP system comprises a radio frequency SIP module, a Balun network and a local oscillator power division amplification module. The radio frequency SIP module realizes receiving, transmitting and processing of multi-channel radio frequency signals. According to the invention, a multi-channel transmit-receive integrated system with high integration, large bandwidth and miniaturization can be realized.

In the current transformer, a plurality of PCBs (printed circuit boards) are distributed on a magnetic iron core framework, welding spots, integrating resistors and damping resistors are welded on the PCBs, the welding spots are used for connecting winding wires, the winding wires are uniformly wound among the welding spots on the magnetic iron core framework according to the number of turns at intervals to form windings, and the winding wires are wound on the magnetic iron core framework. The number of spaced turns is associated with the damping resistance. According to the patch damping resistor type broadband self-integration Rogowski coil current transformer, the resonance phenomenon of the coil can be suppressed, and the bandwidth of the self-integration Rogowski coil current transformer is increased to a large extent.

The invention relates to a wireless data security access gateway with integrated broadband and narrowband, which comprises a broadband wireless communication module and a narrowband wireless communication module which are respectively and electrically connected with a main processor and are used for receiving data transmitted by a terminal; the main processor comprises a data processing unit which is used for capturing terminal data transmitted from the broadband wireless communication module and the narrowband wireless communication module, performing priority classification, analysis classification, protocol conversion and storage control on the data, and forwarding the data to the safety protection unit; the security protection unit is used for carrying out identity authentication, encryption and decryption control and integrity verification on the data; the intelligent routing unit is used for receiving the data transmitted from the safety protection unit and selecting an optimal transmission path for data transmission; the memory is used for storing a priority setting table, a protocol configuration file, an operation log and a transmission log; and the national secret chip is used for encrypting and decrypting the data when receiving the encryption and decryption control signal sent by the security protection unit.

The invention discloses a dual circularly polarized common aperture phased array antenna applied to low orbit satellite communication, comprising M * N antenna array sub-arrays, the M * N antenna array sub-arrays are uniformly distributed in M rows and N columns, each antenna array sub-array comprises four antenna units, the four antenna units are uniformly distributed in 2 rows and 2 columns, any antenna unit can completely coincide with the other three antenna units when rotating by a certain angle with the central axis of the antenna array sub-array as the rotating axis, and the first antenna unit comprises a combined radiation layer, a first copper plate, a coupler layer and a second copper plate which are arranged from top to bottom. The coupler layer adopts an orthogonal coupler realized based on a short-circuit three-branch structure to convert an external radio-frequency signal into two radio-frequency signals with a phase difference of 90 degrees, and the two radio-frequency signals are transmitted to the combined radiation layer; the combined radiation layer adopts a linear dipole radiator with separated upper and lower parts to realize broadband design; the broadband wide-angle scanning device has the advantages of being capable of achieving wide-angle scanning, wide in frequency band, simple in overall structure and low in manufacturing cost.

The invention provides an EML laser and a preparation method of an air bridge, belongs to the technical field of optical communication lasers, and is used for solving the problem that the stray capacitance of connecting metal between a waveguide electrode and a PAD electrode of the EML laser is too large. The preparation method of the air bridge process of the EML comprises the following steps: growing a mask layer on the surface of an epitaxial InP wafer, photoetching to form a ridge waveguide pattern, etching the mask layer by adopting ICP (Inductively Coupled Plasma), and removing photoresist; etching the ohmic contact layer by adopting ICP (Inductively Coupled Plasma) and removing the mask layer; gluing and photoetching the surface of the wafer to form a pier pattern; adopting ICPCVD to grow a dielectric film at low temperature; gluing and photoetching the surface of the wafer to form a dielectric film bridge pattern; carrying out ICP etching on the dielectric film and removing the bridge and pier photoresist to form a dielectric film bridge; and performing wet etching on the InP epitaxial layer to the etching stop layer. According to the method, the dielectric film bridge is built at the connecting metal between the waveguide electrode and the PAD electrode, the low dielectric constant characteristic of air is utilized, the distance between the metal and the quantum well is greatly increased, the stray capacitance of the EML is reduced, and the bandwidth is improved.

The invention belongs to the technical field of wireless optical communication, and discloses a cross-domain relay type radio frequency-laser communication module and a communication method, and the cross-domain relay type radio frequency-laser communication module is provided with a node construction module, a relay module, a synchronous control module, a modulation-demodulation module and a situation awareness module. According to the invention, a large-scale MIMO technology, DMD structure light modulation and AWI signal modulation and demodulation technology are utilized to autonomously design a large-bandwidth and high-secrecy radio-light transmission conversion module; a high-precision synchronous control module is designed by using a GD32 chip, and low-delay and low-error-code relay type cross-domain information interconnection is ensured. Meanwhile, a high-sensitivity area array CCD detector is combined to sense the position of a light spot, an underwater speckle recognition alignment algorithm is developed based on YoLoV8, azimuth information is output to assist semi-active alignment, and then low-cost, low-time-delay, high-speed, long-distance and large-capacity all-weather cross-domain communication in complex water areas is achieved.

The invention belongs to the technical field of dual-computer hot standby, and discloses a dual-computer hot standby system and a dual-computer switching method. The dual-machine hot standby system comprises a machine A and a machine B which are hot standby for each other, and an internal switch; one of the A machine and the B machine is a host used for performing data communication with an external system, and the other one is a slave used for backing up data of the host; the machine A and the machine B are connected with an external system through respective external communication interfaces; and the machine A and the machine B are connected with respective reflective memory cards through optical fibers to serve as main synchronization channels, and are connected with an internal switch through the Ethernet to serve as a standby synchronization channel through respective internal communication network ports, so that data synchronization and backup between the machine A and the machine B are realized. The invention further provides a corresponding switching method. According to the invention, the reliability and stability of long-time uninterrupted operation of the dual-computer hot standby system can be improved, the switching recovery time is shortened, and the requirements of different network environments and application scenes can be met.

The embodiment of the utility model provides a dual-polarization dielectric dipole antenna, the antenna comprises a cross-shaped radiation unit and a guide sheet, the cross-shaped radiation unit comprises a first dielectric plate and a second dielectric plate which are in cross-shaped vertical cross connection; the feed balun circuit on the second dielectric plate crosses the side edge of the top of the first dielectric plate and is connected with the radiation arm on the same side surface of the second dielectric plate; a through hole is formed in the position, at the crossed connection position of the first dielectric plate and the second dielectric plate, of the second dielectric plate and is flatly attached to the first dielectric plate, so that the feed balun circuit on the first dielectric plate is connected to the radiation arm on the same face of the first dielectric plate through the through hole along the penetrating plane. According to the embodiment of the invention, the number of holes in the cross-shaped radiation unit is reduced, so that the antenna is simple to manufacture, and the production cost and the intermodulation distortion risk are reduced. In order to further reduce radiation unit holes, the two groups of feed balun circuits can be wound and crossed from the top, or one group of radiation arms are optimized into slot coupling feed, and coupling perforation is canceled.

The invention provides a zero-copy rapid transceiving device, a data sending method and a data receiving method, and relates to the technical field of network communication, the zero-copy rapid transceiving device comprises a network card in which a direct memory access controller and an associated annular cache region are configured; the kernel protocol stack is configured with a data cache structure body, and a data pointer of the data cache structure body and a packet descriptor of the annular cache region are configured to point to the same memory region; when the network card receives external data, the direct memory access controller copies the data to the memory area according to the direction of the packet descriptor so that the data can be processed by the kernel protocol stack, and when the kernel protocol stack sends the data, the data is copied to the memory area according to the direction of the data pointer so that the data can be sent by the direct memory access controller. The method has the beneficial effects that data copying is not needed in a driving layer message data processing process, so that storage resources are effectively saved, the load of a CPU (Central Processing Unit) is reduced, and the network bandwidth and the system performance are effectively improved.

The invention discloses a soft start control circuit and method, a resonant transformation control circuit and electronic equipment, and the soft start control circuit comprises a charge feedback circuit which obtains a charge feedback signal through employing a resonant output signal; the voltage feedback circuit is used for obtaining a voltage feedback signal by utilizing a difference value between the power supply output signal and the target reference voltage; the logic control circuit is used for generating a first control signal in a first starting stage; in a second starting stage, generating a second control signal by adopting the maximum preset switching frequency and the adjustable dead time; in a third start-up stage, slope compensation is performed on the voltage feedback signal to obtain a feedback adjustment signal, and a third control signal is generated by using the feedback adjustment signal and the charge feedback signal; the logic control circuit adjusts the inverter AC signal by using the first to third control signals. By means of the mode, the soft start control circuit is high in dynamic response speed, small in starting current and simple in control logic.

The invention relates to the technical field of gas detection, in particular to a gas detection method and system for a dangerous workplace. The method comprises the following steps: acquiring gas concentration and position information of each detection point in real time; dividing the whole detection area into a plurality of grids, and calculating the concentration density of each grid by adopting a kernel density analysis method based on the gas concentration and position information of each detection point; based on the concentration densities of all grids, constructing a gas concentration plane distribution diagram of the whole detection area; based on the gas concentration plane distribution diagram, manual inspection is carried out on the gas concentration overrun position, and the reliability and accuracy of gas detection in the working environment where gas diffusion is complex or uneven are guaranteed.

A composite structure hollow anti-resonance optical fiber disclosed by the present invention comprises an outer cladding layer, a doping layer and an anti-resonance layer which are sequentially arranged from outside to inside, the anti-resonance layer comprises a plurality of glass nested combination tubes which are uniformly distributed along the circumferential direction, are tangent to the doping layer and are arranged at intervals, and the plurality of glass nested combination tubes surround to form an air fiber core. The glass nested combined pipe comprises an outer nested pipe of a circular structure and an inner nested pipe of an oval structure arranged in the outer nested pipe. The short half axis of the inner nested pipe is arranged in the radial direction of the optical fiber, and the outer ring, away from the air fiber core, of the inner nested pipe is tangent to the inner ring, away from the air fiber core, of the outer nested pipe. According to the invention, a multi-layer nested structure is adopted, and the anti-resonance effect is optimized through the cooperation of the doping layer and the anti-resonance layer with a special structure.

The invention relates to a hollow-core optical fiber guide type cold atom inertia measurement system and a use method, and belongs to the technical field of cold atom interference measurement inertia. The hollow-core optical fiber guide type cold atom inertia measurement system comprises a vacuum cavity assembly, a laser coupling module I, a laser coupling module II, a cold atom group preparation module and a gravitational acceleration measurement module, according to the invention, a uniform light potential well is constructed by using the hollow-core optical fiber with low loss, high bandwidth and large core diameter, long-distance constraint and guidance are carried out on the cold atom ensemble, and a guide light field applies an optical fiber radial constraint force to the atom ensemble, so that the degree of freedom of motion of the atom ensemble in a non-measurement direction can be inhibited; gravity measurement in a dynamic environment and gravity component measurement in any vector direction are achieved, meanwhile, the size and power consumption of the system are reduced, and integration and engineering of the system are achieved.

The invention discloses a two-degree-of-freedom permanent magnet synchronous motor driving method and a driving device thereof. A current instruction value of a d-q axis passes through a first coordinate conversion module to obtain an instruction value of a three-phase stator current; then comparing with a three-phase current actual value fed back by sampling, and obtaining a feedback item of a three-phase instruction voltage through a PI regulator module; deriving a recursive relational expression of d-q axis current along with the change of the control period, processing three-phase voltage fed back by the motor through a third coordinate transformation module to obtain d-q axis voltage, substituting the feedback three-phase current through a second coordinate transformation module to obtain d-q axis current and a d-q axis current instruction value into the recursive relational expression, and finally obtaining a three-phase instruction voltage feed-forward item; and adding the feed-forward item and the feedback item to obtain a three-phase voltage instruction value, inputting the three-phase voltage instruction value into a switch function module, determining a power device in the controlled three-level inverter bridge module according to the positive and negative of each instruction value, comparing the power device with a carrier wave to obtain a required PWM wave, and finally obtaining an alternating current and outputting the alternating current to the three-phase permanent magnet synchronous motor.

The invention discloses a silicon light modulator which comprises a silicon substrate, an insulating oxide layer, a top-layer silicon waveguide modulation region and a top-layer covering oxide layer which are stacked in sequence, and the top-layer silicon waveguide modulation region sequentially comprises an n-type heavily doped region, an n-type main doped region, a p-type main doped region and a p-type heavily doped region in the first direction. The invention further discloses a compensation doping method of the silicon light modulator. The silicon light modulator has the advantages that compensation doping is carried out on the flat plate region in an oblique ion implantation mode, and the effects of improving the bandwidth and the modulation efficiency of the silicon light modulator can be achieved at the same time. And compared with a single bandwidth optimization scheme and a single efficiency optimization scheme of the silicon optical modulator, the extra insertion loss introduced by the method is not obviously increased.

The invention relates to a safety protection system based on small wireless and power line broadband carrier dual-mode communication. The safety protection system comprises a small wireless communication module, a power line broadband carrier communication module, a controller module, a safety protection module and a sensor and execution mechanism module. According to the system, through combination of small wireless communication and power line carrier communication, a communication network with high reliability and wide coverage is realized. The controller module intelligently manages switching and cooperative work of two communication modes, and ensures communication stability in a complex environment. And meanwhile, the security protection module provides data encryption, identity authentication and abnormal behavior detection functions, so that the security of the system is enhanced. The system is widely applied to scenes such as smart home, office safety and industrial parks, the reliability and safety of communication can be remarkably improved, and resource utilization is optimized.

The 1394B bus-based hybrid data stream transmission scheduling system comprises an interface control module, a data carrying module, a data processing module and a control scheduling module, when a short message is sent, the control scheduling module firstly checks whether configuration information of a destination node exists locally or not; if yes, a data processing module, a data carrying module and an interface control module are called to send the short message to a destination node; when a stream message is sent, a control scheduling module firstly checks whether configuration information of a destination node exists locally, and if yes, a data processing module, a data carrying module and an interface control module are called to send handshake information to the destination node; and if the destination node replies the response within the specified time, the scheduling module is controlled to set the sending busy state of the node and send the stream message to the destination node, and after the stream message data is sent, the scheduling module is controlled to clear the sending busy state of the node and clear the handshake mark between the node and the destination node.

The invention provides a low-noise amplifier and a radio frequency front-end module, and the low-noise amplifier comprises an input matching circuit, a first-stage power amplification circuit, an inter-stage matching circuit, a second-stage power amplification circuit and an output matching circuit. The inter-stage matching circuit comprises a first inductor, a second inductor and a first capacitor; the second-stage power amplification circuit is of a cascode structure; and the output matching circuit comprises a third inductor and a fourth inductor which are coupled with each other. According to the low-noise amplifier, the high-frequency gain, the in-band gain flatness, the isolation degree, the stability and the output matching bandwidth of the low-noise amplifier can be improved.

The invention discloses an intelligent unmanned crane control system, which relates to the technical field of crane control systems and comprises a data acquisition module, a data processing module, a delay analysis module, a prediction analysis module, a load analysis module and a distributed control module. Extracting shaking information FD1 and inclination information FD2 in the dynamic change information FD, calculating a load risk value Q, and judging a load abnormal state according to the Q; performing three-dimensional dynamic trajectory coincidence judgment of M and N by a prediction analysis module through the position information A and the position information WA, and identifying obstacles in surrounding objects; risk early warning of load analysis and prediction analysis is improved, targeted obstacle avoidance processing is performed according to three different early warning signals of obstacles, and the effect of emergency obstacle avoidance is achieved.

The invention discloses a data acquisition system based on a multi-user multiplexing mechanism, and the system comprises the following modules: a 4G communication terminal module which is used for accessing a VPN network through a VPDN protocol; the industrial gateway module is used for connecting the 4G communication terminal and the middle station through a VPN network, supporting data acquisition and classified storage of southbound equipment, and cooperating with the middle station to realize multi-user data management; the middle station module is used for receiving, classifying and storing the data uploaded by the industrial gateway and providing decryption and data access services according to user permission; the user information management module is used for maintaining a user basic information table, a southbound equipment information table and a data point information table; the encryption and security module is used for performing classified storage and encryption processing on the user data and distributing an independent secret key; and the communication protocol module is used for realizing data encapsulation and transmission based on an MQTT protocol. By utilizing 4G communication, industrial gateway centralization and multi-user multiplexing technologies, efficient data acquisition and classified transmission are realized, and the system has the advantages of low cost, high data security and the like.

The utility model discloses a spectrum analyzer, comprising a tunable laser used for outputting frequency laser; the frequency expansion module is used for receiving the frequency laser output by the tunable laser, performing frequency expansion processing and then outputting frequency expansion laser; the signal acquisition module is used for acquiring a signal after the frequency expansion laser output by the frequency expansion module passes through the object to be measured; and the data processing module is used for analyzing the signal acquired by the signal acquisition module to obtain the frequency response of the to-be-detected object. According to the spectrum analyzer disclosed by the utility model, the frequency laser output by the tunable laser is subjected to frequency conversion through the frequency expansion module, so that the bandwidth of the spectrum analyzer is greatly expanded, and full-wave band spectrum analysis from purple light to infrared light is realized.

The invention discloses a multi-beam reconfigurable antenna with multi-polarization and beam switching functions, and relates to the technical field of wireless communication antennas. Comprising a reconfigurable feed network and a plurality of electromagnetic dipole antenna units. Each antenna unit is composed of four square patches with arc-shaped grooves and two rectangular patches, the four square patches with the arc-shaped grooves are connected with the metal floor through four short circuit columns, the rectangular patches are connected with the feed network through copper columns, the two rectangular patches are printed on the front face and the back face of the dielectric plate respectively, the height difference of the two rectangular patches is 1 mm, and the two rectangular patches are orthogonal in position. Independent tuning of various polarization and wave beam states can be realized, and the antenna has the advantages of high integration level, large bandwidth, multiple polarization, convenient operation, low cost and the like, and is suitable for systems of multi-target detection, traffic communication and the like.