477 results about "Characteristic impedance" patented technology

The invention relates to the technical field of vehicle charging station operation and maintenance management, and particularly discloses a new energy vehicle charging station operation and maintenance management system and method based on the Internet of Things, and the method comprises the steps: collecting high-frequency harmonic characteristic data in a charging process in real time, and generating harmonic-impedance spectrum combined monitoring data; extracting dynamic attenuation gradient data of the line characteristic impedance; when the dynamic attenuation gradient data is lower than a preset critical safety threshold value, triggering a charging mode switching instruction; the charging piles are controlled to be switched into a charging mode, the phase difference parameters of the multiple charging piles are dynamically optimized, and a phase difference dynamic adjustment instruction set is generated; and finally, self-adaptive correction of the impedance compensation amount is carried out through the MEC equipment, and by self-adaptive correction of the impedance compensation amount, the system can maintain that the overall impedance is constantly greater than a critical safety threshold value, and power loss and equipment damage caused by impedance mismatch are avoided. The real-time feedback mechanism is helpful for improving the energy efficiency of the system, reducing the operation cost and ensuring the long-term reliability of the charging infrastructure.

The invention relates to the technical field of integrated circuit testing, in particular to a distance-adjustable probe connector device which comprises an impedance detection unit which comprises a connector fixing part, a connector rotating part, a single connection port, a signal probe and a grounding probe. The impedance data unit is used for determining a characteristic impedance value of the tested microstrip line based on data acquired by the signal probe and the grounding probe; the pressure detection unit is used for determining the contact pressure according to the telescopic displacement of the signal probe and the grounding probe; the control unit determines the allowable range of the contact pressure of the probes based on the line width of the microstrip line to be tested and the distance between the probes, and adjusts the angle between the grounding probe and the surface of the PCB based on the contact pressure difference between the signal probe and the grounding probe and the line width of the microstrip line. And adjusting the contact pressure of the signal probe to obtain the effective characteristic impedance value of the tested microstrip line. According to the invention, the angle and pressure of the grounding probe are intelligently adjusted, and the problem of impedance measurement drift caused by pressure imbalance of double probes is eliminated.

The invention discloses an image analysis method and system for quality control traceability of a satellite navigation board, and relates to the technical field of image processing. The method comprises the following steps: synchronously acquiring an image and three-dimensional point cloud data of a radio frequency transmission line area through a high-resolution area array CCD camera and a laser contourgraph; acquiring a transmission line contour based on image identification, and constructing a three-dimensional radio frequency line model through point cloud fitting; detecting the line width and the distance to the ground plane by using the model, and calculating the impedance prediction complexity in combination with a data acquisition error; dynamically calling a characteristic impedance prediction engine based on the complexity to obtain a predicted characteristic impedance sequence; and quality defect judgment is carried out, and traceability control is carried out on defective products. According to the method, a complete technical chain from geometric dimension detection to electrical performance evaluation is established, hidden defects which are difficult to find by a traditional method can be effectively identified, and the quality control precision and the product yield of the satellite navigation board are improved.

The invention belongs to the technical field of production control, and provides a production control method and system for a high-frequency data cable. The method comprises the following steps: detecting a group of thickness distribution data of a foaming belt at a belt placing end of the foaming belt by adopting a laser thickness gauge, and calculating to obtain a thickness distribution deviation value; when the thickness distribution deviation value exceeds a deviation threshold value, depth prediction is carried out on the group of thickness distribution data and the foaming belt type by using a conjoint analysis model based on lightweight temporary case data, and joint compensation parameters are obtained and comprise associated line pressing pressure and line pressing temperature; and a line pressing device integrated with a heating element is controlled to mechanically press the foaming belt, so that the density uniformity of the foaming layer is improved to be higher than a specified value. Through the temperature and pressure synergistic effect, the foaming belt is slightly softened and uniformly fills the gaps of the core wires, the density uniformity of the foaming layer can be further improved, and therefore the characteristic impedance consistency and the anti-interference performance of the cable are remarkably improved.

The invention relates to the technical field of electromagnetic wave time domain antennas, in particular to an anisotropic material-based ultra-wideband ground penetrating radar antenna, which comprises a time domain butterfly antenna unit, a sponge layer, an anisotropic material, a metal back cavity and a coaxial feed part. According to the invention, a butterfly antenna is mainly selected. The antenna is made of an all-metal material, the patch is an elliptical butterfly antenna, a distributed loading resistance loading mode is selected, the characteristic impedance of the antenna is basically kept unchanged along with the frequency, and meanwhile, the bandwidth is increased; the back cavity is added to reduce the influence of the surrounding environment and all parts in the system on the antenna and suppress the omnidirectional radiation of the antenna, and the absorption layer is added in the back cavity to cover the back cavity, so that multiple reflections between the antenna and the cavity are suppressed. The designed antenna is low in working frequency band, wide in frequency band, good in time-domain characteristic, simple in feeding and capable of achieving long-distance high-resolution detection under a deep layer.

According to the power distribution network fault protection and positioning method and system based on the fast switch, an edge calculation node adopts noise self-adaptive improved Morlet wavelet transform, and a current change rate and a voltage break variable are extracted from a transient signal; constructing a three-dimensional decision model taking the current change rate, the voltage break variable and the line characteristic impedance as variables; based on a three-dimensional decision-making model, when it is judged that an internal fault occurs by using the extracted current change rate and voltage break variable, the distributed detection unit sends the action state quantity of the equipment where the distributed detection unit is located to an edge computing node; after the edge computing node utilizes the action state matrix of the equipment, a state reasoning method based on a fuzzy Petri network is adopted to determine a fault section; verifying the fault section according to the matching degree of the fault current weighting and the characteristic impedance of the equipment in the fault section; after the fault section is verified, fault isolation is executed; and after fault isolation, fault positioning is optimized, and it is ensured that the cooperative breaking time sequence of the multi-stage switch is accurately matched with a fault diffusion path.

The invention discloses an impedance self-adaptive high-frequency probe, a probe card and a testing method, and belongs to the technical field of semiconductor high-frequency testing. When an existing high-frequency probe is used for a crimping test, a conductive probe body of the existing high-frequency probe generates mechanical deformation due to contact pressure, so that characteristic impedance is deviated, and uneven pressure in an array causes impedance dispersion. The problem is solved by coating the outer side of the conductive needle body with a composite material layer, the composite material layer is composed of an elastic insulating matrix and metal particles dispersed in the elastic insulating matrix, the metal particles have bimodal particle size distribution, and the total integral number is 30%-40%. When the probe is pressed, the composite material layer is subjected to reversible microscopic reconstruction, the effective dielectric constant of the composite material layer is increased along with the increase of the pressure, and the generated impedance change can counteract the impedance drop caused by the deformation of the conductive probe body, so that the self-adaptive stability of the characteristic impedance of the probe under the change of the pressure is realized. The impedance dispersion of the probe array can be remarkably reduced, the consistency and precision of high-frequency testing are improved, and the process compatibility is good.

A fault detection system for detecting a fault condition in a direct current (DC) system. The system may include a transmitter including a DC source to energize a cable and a receiver connected to the cable and including a signal generator to generate a periodic signal. The transmitter may include a termination impedance matched to the characteristic impedance of the cable to absorb substantially all the periodic signal. The transmitter may include a fault detection circuit coupled to the cable to detect changes in the frequency response of the cable by tracking changes in the envelope of the power of the periodic signal and outputting a fault signal if the rate-of-change of the envelope of the power of the period signal exceeds a threshold level.

The invention provides a liquid crystal phase shifter, an antenna device and an antenna system, and relates to the technical field of communication. The liquid crystal phase shifter comprises a first dielectric substrate, a grounding metal layer, a dielectric functional layer, a micro-strip signal line and a second dielectric substrate which are stacked in sequence, the grounding metal layer is provided with a plurality of groups of grid structures which are arranged at intervals, and each group of grid structure comprises a plurality of grids which are distributed at intervals; and the length direction of the micro-strip signal line is parallel to the arrangement direction of the plurality of groups of grid structures. In the embodiment of the invention, the defected ground structure is formed by the plurality of groups of grid structures on the grounding metal layer, so that a relatively wide microstrip signal line can be conveniently arranged, and a relatively thin dielectric functional layer can be arranged under the condition that the characteristic impedance of the liquid crystal phase shifter is ensured, so that the miniaturized liquid crystal phase shifter is realized; in addition, when phase shifting is carried out based on the liquid crystal phase shifter, the thinner dielectric functional layer is convenient for reducing loss and improving response speed, so that the phase shifting performance of the liquid crystal phase shifter is improved.

The invention discloses an optimization method of a butterfly-shaped UHF antenna, and the method comprises the following steps: determining a preset angle range of a semi-apex angle based on the matching relation between the characteristic impedance of the butterfly-shaped antenna and the working frequency band width, so as to achieve the stable change of the input impedance and the broadening of the frequency band; according to the wavelength of the low-frequency end of the working frequency band, a preset proportional relation between the arm length and the wavelength is established to determine the value of the arm length, so that the requirement of the antenna impedance bandwidth on low-frequency-band signal receiving is met; a butterfly antenna is arranged in a metal back cavity to form a back cavity type antenna, the height of the back cavity is determined according to the wavelength corresponding to the strongest frequency of a signal so as to suppress back radiation and enhance forward radiation gain, and systematic improvement of electromagnetic wave signal receiving performance is realized through collaborative optimization of structural parameters of the butterfly antenna and the back cavity.

The invention relates to the field of electrical variable measurement, in particular to an insulating layer compactness detection method for a mineral cable, which comprises the following steps: firstly, acquiring a time domain reflection signal of the cable, and carrying out denoising pretreatment by utilizing synchronous average and wavelet transform; and then, carrying out spectrum analysis on the discrete signal segments, calculating a spectrum centroid offset rate to determine high-frequency energy attenuation, and constructing a dynamic compensation gain coefficient according to the high-frequency energy attenuation. And then, improving a traditional layer stripping algorithm by using the gain coefficient, eliminating calculation deviation caused by transmission loss, and accurately reconstructing characteristic impedance distribution along the cable. And finally, by comparing the deviation between the reconstructed impedance and the nominal impedance, positioning and judging the abnormities of the compactness of the insulating layer of the cable and the eccentricity defect of the cable core are realized.

The invention discloses an adjustable noise reduction device, a noise reduction adjusting method and a range hood, the adjustable noise reduction device comprises a sound absorption chamber and a cover plate covering the sound absorption chamber, each layer of cover plate comprises a plurality of parallel and spaced battens, and the battens of the adjacent upper and lower layers are arranged in a staggered manner to form a plurality of micropores communicating with the sound absorption chamber; a plurality of driving mechanisms are arranged on the side edge of the sound absorption cavity, and the driving mechanisms on the different side edges are connected with the battens on the different layers correspondingly. The driving mechanism is used for driving the battens to move so as to adjust the distance between the battens on the same layer. According to the adjustable noise reduction device, the noise reduction adjusting method and the range hood, the structural strength is improved, meanwhile, the adverse factor that the acoustic resistance is too large due to the fact that the plate thickness is increased is avoided, the adjustable noise reduction device can be matched with the characteristic impedance of air, and therefore the sound absorption and noise reduction effect is improved. In addition, the sound absorption frequency band of the adjustable noise reduction device can be adjusted, the sound absorption capacity under different frequencies is improved, and therefore the adaptability to different working conditions and the sound absorption and noise reduction effect are improved.

The invention discloses a resistor matching structure, a chip, an optical device and an optical module, and belongs to the technical field of electronics. The resistor matching structure comprises a plurality of strip-shaped resistors and a conductive structure, wherein the ends, close to the conductive structure, of the strip-shaped resistors are connected with the conductive structure, the ends, away from the conductive structure, of the strip-shaped resistors are used for being connected with the strip-shaped conductors, and the multiple strip-shaped resistors are jointly used for being connected with the multiple strip-shaped conductors; at least one resistor pair exists in the plurality of strip-shaped resistors, each resistor pair comprises two adjacent strip-shaped resistors which can be mutually inducted, and strip-shaped conductors connected with the two strip-shaped resistors have different potentials. In order to realize resistance matching, the total impedance of the plurality of strip-shaped resistors is equal to the total characteristic impedance of the plurality of strip-shaped conductors. According to the modulator, the problem that the modulated optical signal is affected by the reflected electric signal in the modulator, and the optical signal is degraded can be solved. The application is used for resistance matching.

The invention discloses a 16-in-one high-power combiner working in a radio frequency band, and belongs to the technical field of fusion radio frequency heating. The invention comprises a coaxial input hard feeder line, a radial transmission line (RTL), a gradient impedance matching coaxial line and a coaxial output hard feeder line. The physical size is designed through theoretical calculation, electromagnetic field distribution is optimized through simulation, 16 radio-frequency signal input ports are designed through radial symmetric topology, a radial transmission line serves as a main synthesis path of radio-frequency signal source power, the power input by the 16 radio-frequency signal source ports is subjected to one-step efficient synthesis in the center of the radial transmission line, and the radio-frequency signal source power is obtained. And the 50-ohm characteristic impedance standard output of the synthesized radio frequency signal power is realized through an impedance matching technology. The sixteen-in-one power combiner designed by the invention has the characteristics of high synthesis efficiency, symmetrical structure, good amplitude and phase consistency, high isolation, low return loss, low reflection loss, simple design structure, easiness in manufacturing and the like.

The utility model belongs to the technical field of vibration and noise reduction, and relates to an external interference noise suppression module integrated in a hydrophone. The module comprises a high-characteristic-impedance metal round rod and two low-characteristic-impedance rubber round rods, the rubber round rods are connected to the two ends of the metal round rod, the cross sectional areas of the metal round rod and the rubber round rods for transmitting interference elastic waves are the same, and the lengths of the two rubber round rods are different, so that half-wavelength total transmission is restrained. The interference longitudinal wave passes through the noise suppression module, most energy is lost, and the interference noise is effectively suppressed. The utility model has the effects and benefits that the external interference noise is reduced, and the anti-interference level of the hydrophone is improved. The device is widely applied to noise suppression design of the hydrophone, is simple in structure, is convenient to integrate in the hydrophone, and can stably work in seawater for a long time.

The invention belongs to the technical field of superconducting coaxial cable processing, and particularly relates to a superconducting coaxial cable and a preparation method and application thereof. The superconducting coaxial cable is composed of an outer conductor, a PTFE insulation module and an inner conductor arranged in the PTFE insulation module, the PTFE insulation module is a cylinder with a through hole in the center, supporting structures are symmetrically arranged at the two axial ends of the cylinder, a non-supporting structure is arranged in the middle of the cylinder, and the specific structure of the PTFE insulation module effectively regulates and controls the effective dielectric constant of an insulator. Therefore, the characteristic impedance of the superconducting coaxial cable is flexibly and finely adjusted, and the application requirement of a quantum computer signal transmission device on the characteristic impedance is met. The PTFE insulating module is prepared by pressing and sintering, and NbTi filaments are embedded into the prepared PTFE module by a heating method and are assembled with an outer conductor to form the superconductive coaxial cable. The method is simple in process, convenient to assemble and suitable for large-scale production.

Circuitry and method are described for enabling multiple loads on a differential low voltage differential signaling pair (M-LVDS). A printed circuit board (PCB) contains a M-LVDS driver and leads that route a main channel that carries a differential signal from the driver to an area in which loads are populated. The main channel is split into branches that contain application-specific integrated circuits (ASICs) as the loads. The branches have the same characteristic impedance as the main channel. Filters are disposed in each branch and are coupled between the driver and the ASICs. Each filter is a first order or higher filter. Fewer filters than ASICs are on each branch, with the filters being disposed between the driver and ASICs closest to the driver (with smaller propagation delay). The filters are configured differently at each ASIC input to compensate for the delay.

The invention discloses a phased-array antenna control method and system based on impedance matching, a medium and a product, and relates to the technical field of antennas. In the method, before the phased-array antenna works, a target impedance matching parameter is calculated for active input impedance under each preset scanning angle point; establishing a target mapping relation table based on the plurality of preset scanning angle points and the corresponding target impedance matching parameters; during the working period of the phased-array antenna, receiving a target scanning angle, and calculating to obtain a corresponding beam pointing phase value for each antenna unit in the antenna array according to the target scanning angle; determining a real-time impedance matching parameter based on the target scanning angle and the target mapping relation table; and loading the beam pointing phase value to a phase shifter in the feed network, and applying a real-time impedance matching parameter to the dynamic impedance matching network, so that the input impedance of the antenna array is matched with the characteristic impedance of the feed network. By implementing the technical scheme provided by the invention, the radio frequency performance of the phased-array antenna is improved.

The invention provides a double-layer thin-plate underwater sound reflection structure supported by hollow balls, which belongs to the technical field of underwater sound reflection materials and comprises upper and lower rigid plates, a middle hollow ball group arranged in a certain manner and peripheral support beams. The rigid hollow sphere is adopted as a pressure-bearing component of the underwater anti-sound sandwich structure, and the advantage that the spherical structure is not prone to deformation is utilized, so that the whole structure only generates low deformation quantity under high hydrostatic pressure; by means of the characteristic that the contact area between the spherical structure and the sound transmission layer (thin plate) is small, sound energy leakage to the interior is reduced; by means of the characteristic that a large amount of air exists in the spherical shell, the equivalent characteristic impedance of the sound reflecting layer is further reduced, and the sound reflecting capacity is enhanced; in addition, the method has the characteristics of flexibility and universality, can integrate the requirements of working depth, anti-sound performance indexes and the like, and can change the parameters of arrangement density, diameter, shell thickness and the like of the hollow sphere; the invention also has the characteristics of light weight, easiness in transportation and convenience in use.

The utility model relates to an antenna and electronic equipment, and the antenna comprises a substrate, and a first radiator and a second radiator which are the same in shape. Each of the first radiator and the second radiator comprises a first part and a second part; wherein the first part is semicircular, and the first straight edge of the second part is in butt joint with the diameter edge of the first part; the first radiator and the second radiator are in mirror symmetry, and the opening directions of the first part of the first radiator and the first part of the second radiator are opposite; the first radiator is arranged in the upper half area of the front face of the substrate, and the second radiator is arranged in the lower half area of the back face of the substrate. Therefore, the two radiators distributed in the upper area and the lower area of the substrate are in mirror symmetry, and each radiator is provided with a semicircular first part and a semicircular second part, so that the current of the upper radiator and the current of the lower radiator can be kept in the same direction in an ultra-wideband range, the omnidirectional radiation characteristic of the antenna is realized, and the characteristic impedance is gentle along with frequency conversion.

The utility model discloses an electric connection structure and an electric connector combination, the electric connection structure comprises a signal terminal and a jack terminal which are in plugging cooperation, and the signal terminal is provided with a main body part and a plug part which are formed by stamping and curling. The plug part is inserted into the butt joint part which is formed by stamping and curling the jack terminal to form electrical contact, so that abrupt change of characteristic impedance caused by additional increase of the overall outer diameter of a butt joint area is avoided, and impedance matching is ensured to improve high-frequency transmission performance. The signal terminal is provided with two elastic arms which abut against the same conductive pad together to form double conductive paths, so that the signal transmission rate is improved.

The invention relates to a DC measuring device transmission characteristic MMC impedance modeling method comprising the following steps: constructing a difference and common mode time domain small signal model of an MMC main circuit based on the Kirchhoff voltage law; a coupling rule is obtained according to the frequency coupling characteristic and the phase sequence coupling mechanism of the difference and common mode time domain small signal model; converting the difference and common mode time domain small signal model into an HSS-MMC main circuit model according to a coupling rule; establishing each control HSS model according to the MMC control loop structure; deriving a transfer function model of the DC voltage measurement device to update the DC voltage control HSS model; combining each control HSS model and the modulation wave expression to obtain an MMC control system HSS model; the HSS-MMC main circuit model and the MMC control system HSS model are combined to obtain an MIMO admittance model; obtaining an SISO equivalent impedance model of the MMC according to the power grid impedance expression and the MIMO admittance model; and according to MMC system parameters and different frequency disturbance control gains, an SISO impedance model of the MMC is utilized to solve an impedance analytic value. And the MMC high-band impedance characteristic can be accurately described.

This application relates to the field of radio frequency (RF) power supply technology, and discloses a gain calibration method, a dynamic impedance testing method, equipment, and dielectric. The gain calibration method includes: acquiring multiple RF power measurements, where the RF power measurements are the output power measurements of an RF power supply in an open-loop state under multiple load impedance values; performing two-dimensional interpolation fitting in the complex plane of reflection coefficient based on the load impedance values ​​and the RF power measurements to obtain a continuous power distribution; selecting a minimum RF power value in the complex plane of reflection coefficient based on the continuous power distribution to obtain a target minimum RF power value; and calculating the gain of the RF power supply based on the target minimum RF power value, the load impedance value corresponding to the target minimum RF power value, and a preset characteristic impedance value. The embodiments of this application can improve the accuracy of RF power supply gain calibration and reduce the impact of environmental noise and small impedance fluctuations.

The invention provides a printed circuit board and a preparation method thereof, the printed circuit board comprises a core board, a first bonding insulating layer and a high-speed line layer, the first bonding insulating layer is located on the surface of the core board, the first bonding insulating layer is provided with a high-speed wiring area, and the high-speed wiring area is located on the surface of the core board. A line groove is formed in the face, away from the core plate, of the first bonding insulation layer in the high-speed wiring area, and the high-speed line layer is embedded in the line groove. According to the printed circuit board provided by the invention, after the high-speed line layer is embedded into the line groove, the relative position of the high-speed line layer and the surrounding medium is fixed and uniform, further, due to the existence of the line groove, the distance between the high-speed line layer and the first bonding insulating layer is kept stable, and the medium distribution is uniform; impedance fluctuation caused by factors such as electroplating in operation is reduced, consistency of wiring characteristic impedance can be better maintained, and high-speed signal transmission quality is guaranteed.

The invention relates to the technical field of radio frequency processing, discloses a radio frequency chip fan-out packaging design method based on machine learning optimization, and aims at the design of high-speed packaged high-frequency pins. A high-frequency pin GSG structure design process is decoupled into a mapping problem of an RDL signal line length L, a signal line and ground line spacing S, a signal involute angle alpha and pin characteristic impedance, loss and return loss electrical performance. And by taking the solving process of the positive problem as a training environment, reversely solving a specific combination of GSG structure design size parameters meeting different design demand responses. Meanwhile, in the face of small-batch radio frequency chip product design of customized, small-crowd or technical exploration stage scenes with few products and various forms, a non-ergodic sample collection and later-stage small-amount adjustment mode is adopted, and the situation that ergodic simulation covers all parameter ranges to generate models and simulations in batches is avoided; and the earlier-stage investment time and computing power cost are higher than the small-batch production income.

The utility model relates to the technical field of transmission cables, in particular to a DP2.116K high-definition transmission line, which comprises a component II and filling cotton yarns, a signal line, a shielding layer and an outer coating layer are respectively wrapped on the surface of the component II, the signal line comprises a component I and a bulletproof wire structure, an aluminum foil layer is wrapped on the surface of the component I, and the outer coating layer is wrapped on the surface of the component II. The surface of the aluminum foil layer is wrapped by a hot melting polyester belt, the surface of the first component is wrapped by a middle sheath layer, the signal line is wrapped by an aluminum foil mylar layer, and an insulating layer is arranged between the signal line and the aluminum foil mylar layer. According to the utility model, through the cooperation of the component 1, the aluminum foil layer, the hot melt polyester tape and the middle protected layer, smaller attenuation and stable characteristic impedance can be ensured, the attenuation of a finished product 1.5 M DP80 can be controlled within-10dB / 15GHz, the standard characteristic impedance is 85 + / -5 omega, the actual characteristic impedance can be 85 + / -3 omega, through the cooperation of the shielding layers, the shielding rate is more than%, and EMI interference is effectively prevented by adopting three shielding layers.

The application discloses a kind of armored double-layer shielded dry reed relay and its manufacturing method.The dry reed relay includes dry reed tube, inner shield tube, coil framework, coil, outer shield shell, coil lead, shield lead, side plate, sealing assembly and switch lead.The armored double-layer shielded structure of the above-mentioned dry reed relay can solve the problem of dry reed tube contact characteristic impedance matching uniformity by means of inner layer shielding, solve the problem of relay coil magnetic field leakage and low-frequency electromagnetic field shielding by means of outer layer shielding, and realize the problem of relay structure complete shielding and distributed parameter uniformity by means of coaxial structure.

The application discloses a broadband multi-stage Gysel power divider based on an IPD process, comprising a microstrip structure layer, and first and second dielectric substrates and a ground metal layer; the microstrip structure layer adopts a multi-layer nested structure, each layer of the nested structure is formed by cascading multi-stage Gysel power division units, and is arranged on the upper surface and the interior of the first dielectric substrate, so that an integrated layout based on the IPD process is formed, and a planar spiral structure, an air bridge, a parallel plate capacitor, a thin film resistor and a layered ground unit structure are integrated; the planar spiral structure is equivalent to a specific characteristic impedance transmission line, the air bridge structure solves cross interference and suppresses a parasitic capacitor, the parallel plate capacitor structure calibrates equivalent reactance parameters, the thin film resistor effectively improves port isolation and heat dissipation, and the layered ground unit structure strengthens heat dissipation and ground reliability. The application can realize stable power distribution in a wide frequency band, and is suitable for the integration requirements of high-frequency, high-power and small-sized radio frequency front ends.

A Doherty amplifier according to the present disclosure comprises a main amplifier, an auxiliary amplifier, a distribution circuit that distributes signals to the main amplifier and the auxiliary amplifier, and a phase compensation circuit. The main amplifier has a first input matching circuit and a plurality of main amplification stages. The auxiliary amplifier has a second input matching circuit and a plurality of auxiliary amplification stages. The distribution circuit has a first line connected to the first input matching circuit and a second line connected to the second input matching circuit. The electrical length of the first line is such that the input impedance of the first line is higher than the characteristic impedance of the first line and the imaginary component is less than 10% of the real component when a small signal is input. The electrical length of the second line is such that the input impedance of the second line is higher than the characteristic impedance of the second line and the imaginary component is less than 10% of the real component when a small signal is input. The phase compensation circuit is provided in an inter-stage matching circuit of the plurality of main amplification stages or the plurality of auxiliary amplification stages.

The invention relates to the field of power line channel modeling, in particular to a power line channel modeling method, system, equipment and medium, power line channel data is actually measured and collected and preprocessed, channel characteristics are extracted, parameters such as characteristic impedance and propagation constant of a power line are calculated by using a transmission line theory, and the power line channel is modeled. Constructing an enhanced conditional generative adversarial network comprising a generator and a discriminator, inputting parameters obtained by theoretical calculation of a transmission line as conditional information in a training process, optimizing structures and loss functions of the generator and the discriminator, enabling the generator to generate a high-quality analog channel sample, fusing a deep learning model with a transmission line theoretical model, and obtaining a high-quality analog channel sample; according to the method, a mixed channel model is formed, model parameters are alternately trained and optimized, accurate prediction of transmission characteristics of the power line channel is realized, complex characteristics of the power line channel can be effectively modeled, and a reliable basis is provided for design optimization of a power line communication system.