62results about How to "Meet the volume" patented technology

The invention relates to a phased array radar antenna beam control device. The phased array radar antenna beam control device comprises a remote control PC (Personal Computer) computer, a user control computer module, a power supply management module, a FPGA (Field Programmable Gate Array) chip, a signal driver, a wave control conversion circuit and a controlled device which is electrically connected with the wave control conversion circuit, wherein the user control computer module remotely communicates with the remote control PC computer and are electrically connected with the FPGA chip, thepower supply management module and the wave control conversion circuit, respectively. The FPGA chip is embedded with a PowerPC hardcore and used for constructing an embedded computer; the embedded computer also comprises an Ethernet (Media Access Control), a UART (Universal Asynchronous Receiver Transmitter) controller, a DDR2SDRAM (Double Data Rate 2 Synchronous Dynamic Random Access Memory) memory module, a FLASH controller module, a parallel controller, a FPGA configuration circuit module and a clock generating circuit module. The phased array radar antenna beam control device provided by the invention has the advantage of high reliability.

The scheme of the invention discloses a vehicle assistance driving system based on the infrared thermal imaging and millimeter wave radar technology. The main functions include pedestrian and vehicledetection, image and sound fusion and collision early warning in driving of the vehicle. The early warning system uses the following technical characteristics: the infrared camera and the millimeter wave radar specialized for vehicle-mounted assistance driving, the data acquired by the radar, such as the distance, the direction and the speed and the images acquired by the infrared camera are fusedfor screening and determining the pedestrians or the vehicles, the pedestrian or vehicle characteristics are extracted through the algorithm, finally the result is displayed on the visual interface and multidimensional early warning information including images, numbers and sound is provided.

A minisize distribution controlling system for satellite includes: the system attempering and controlling circuit, the 1553B bus interface circuit, the simulation quantity telemetering circuit, the digital quantity telemetering circuit, and the switch dictate outputting circuit. The invention can achieve the independent online monitoring of the satellite system with higher reliability and stability, brings the design idea and achieving method of data collection and processing based on FPGA technology.

The invention discloses a three-phase auxiliary inverter, which comprises a main circuit and a control circuit, wherein the control circuit detects and controls the main circuit; the main circuit comprises an input filtering circuit, a DC/DC conversion circuit, a DC/AC inverter circuit and an output filtering circuit; and the DC/DC conversion circuit comprises a half-bridge inverter circuit adopting a high-frequency transformer and a full-bridge rectifier circuit. When the inverter is on, the control circuit performs system self-checking, the main circuit works under the condition of no fault, the input filtering circuit filters an input power supply and closes a short-circuit contactor after the charging is finished, the control circuit sends a half-bridge inverter pulse, the DC/DC conversion circuit works and converts the input direct current power supply into a steady intermediate direct current voltage, then the steady intermediate direct current voltage is inverted into a three-phase SPWM wave through the DC/AC inverter circuit, and the three-phase SPWM wave is filtered into a three-phase sine wave through the output filtering circuit and supplies the electricity to a three-phase load. The implementation of the three-phase auxiliary inverter reduces the voltage stress borne by switching devices, and reduces the weight and the volume of power supplies.

The invention discloses a six-level forming method of a medium and high voltage aluminum electrolytic capacitor anode foil. The six-level forming method comprises the main steps of carrying out high-temperature water treatment on an aluminum foil after electrolytic corrosion treatment after the aluminum foil passes through an aluminum feeder roller, carrying out first-level, second-level and third-level forming, and sequentially carrying out four-level, five-level and six-level forming after liquid feeding, wherein only one forming groove is used in the previous five levels of forming process, five forming grooves are used in the six-th level of forming process, and the three forming grooves in the middle are connected in series. The anode foil prepared by the method is high in capacity and high in bending strength. Compared with the film formed in the prior art, the film formed by using the six-level forming method has the advantages that quality is greatly improved; and the demands of the existing electrolytic capacitor on small size, high capacity and long service life are completely met.

The invention discloses an audio power amplifier and an audio device. The audio power amplifier comprises a digital-to-analog conversion circuit, an integral comparison circuit, a power output level circuit, and a feedback circuit, wherein the digital-to-analog conversion circuit converts a digital audio signal into a first analog signal; the integral comparison circuit obtains an analog audio signal according to the first analog signal, a feedback signal and a common-mode voltage signal; the power output level circuit supplies the power by employing a second power supply voltage, and carries out power amplification on the analog audio signal to output a power amplification signal; the feedback circuit generates the feedback signal according to the power amplification signal; the feedback circuit includes a voltage division circuit and a feedback branch, wherein the voltage division circuit carries out voltage division on the power amplification signal, and an obtained voltage division signal is output via a voltage division node; a first end of the feedback branch is coupled to the voltage division node, and the second end of the feedback branch outputs the feedback signal; and an amplitude of the common-mode voltage signal is associated with the second power supply voltage and a voltage division ratio of the voltage division circuit. According to the scheme disclosed by the invention, the audio signal output by the audio power amplifier has a large dynamic range, the circuit area is small, and the cost is low.

The invention discloses an organosilicon surfactant used for high-resilience foam and a preparation method of the organosilicon surfactant, belongs to the technical field of surfactants, and solves the problem of compatibility of a polyurethane high-resilience foam system and surface and dimensional stability of polyurethane foam in the prior art. According to the method provided by the invention,two hydrogen-containing silicone oil having different structures is designed, the hydrogen-containing silicone oil and allyl polyether having different molecular weights are separately subjected to areaction to obtain two polyether-modified silicone surfactants with different structures, a ratio of different components is regulated and controlled to realize balance of openness and stability of the high-resilience foam, so that special requirements of a volume, aeration, shear and surface and dimensional stability of the high-resilience polyurethane foam are met, and the problems of system compatibility and surface and dimensional stability of the polyurethane foam are effectively solved.

The invention discloses a microstrip antenna, an OBU of an ETC system, and an electronic device. The microstrip antenna comprises a radiation patch, a metal surface and a feed network feeding the radiation patch, wherein the radiation patch is provided with two patch slots which are vertically crossed to form a cross, and each patch slot is also provided with an auxiliary slot communicating therewith. The radiation patch provided by the invention enables the antenna to have relatively wide bandwidth and relatively high gains under the feeding effects of dual feed points of the feed network, and excellent circular polarization performance is also exhibited, at the same time, by increasing the flow paths of current on the radiation patch, the microstrip antenna may still satisfy the requirements for working frequency even when the size is reduced, and therefore, the space that the microstrip antenna occupies is saved.

The invention discloses a miniature two-degrees-of-freedom plane motion piezoelectric motor, and belongs to the technical field of precise driving elements. The key technology of the invention is that a piezoelectric driver consists of a piezoelectric ceramic bar, a piezoelectric ceramic tube or a square column piezoelectric single crystal, wherein the piezoelectric ceramic bar, the piezoelectric ceramic tube or the square column piezoelectric single crystal is excited to perform an elliptical resultant movement in a first order length extension vibration mode along a Z axial direction and a second order curving vibration mode along an X direction and the elliptical resultant movement in the first order length extension vibration mode along the Z axial direction and in the second order bending vibration mode along a Y direction; and the two elliptical resultant movements are orthogonal with each other to drive a sliding block to move along an X direction or a Y direction respectively. The motor has the advantages of meeting requirements of indexes such as small volume, light weight, simple structure and the like, along with fast response, high precision and the like.

The invention discloses 126-kV cabinet type gas-insulated metal-closed switching equipment and solves the problems that: the 126-kV cabinet type gas-insulated metal-closed switching equipment in the prior art is large in size; final assembly and check are required in a user field; gas tightness is relatively difficult to guarantee; environmental pollution is easy to occur during switching on or off of an electric main loop by using a sulfur hexafluoride breaker; and pressure resistance capacity is relatively lower. The 126-kV cabinet type gas-insulated metal-closed switching equipment is characterized in that: six compartments have a square box shape formed by laser-cutting and laser-welding non-magnetic stainless steel plates which are 4 mm thick; sulfur hexafluoride gas of which the pressure is 0.1 to 0.2 MPa is filled into all compartments; all compartments realize insulating transition connection by using a disk type bus insulating sleeve component of which the diameter is smaller than 300 mm; a vacuum arc-distinguishing chamber polar column is arranged in a vacuum breaker compartment; and double-sheet splicing buses which realize communication of the main loop are arranged in the six compartments. The 126-kV cabinet type gas-insulated metal-closed switching equipment has the advantages of good gas tightness, high mechanical strength, low manufacturing cost and good environmental benefit, solves the insulating problem under the condition of low gas pressure and improves the operating safety of the equipment.

The invention provides a portable non-invasive neurogenic bladder therapeutic apparatus that belongs to medical instruments field. The instrument adopts FPGA integrated circuit to generate a series of digital pulse signals, and imitates a series of physiological electrical pulse signal which are generated by micturition, the signals are transmitted to the acupuncture points on the skin around human bladder by two groups of ECG monitoring electrodesfor stimulating and controlling contractive muscle of bladder, so that diseases of increase of residual urine in bladder, urinary retention and urinary incontinence, etc,. The invention has advantages of small size, stable and reliable work, little in application condition, cheap price and portable.

The invention discloses an electric automobile charger. An uncontrolled rectifier and a BUCK type PFC two-stage structure are adopted in a main circuit, the charger is of a two-channel parallel structure, the power level of a convertor is improved, the heat distribution of the system is improved, the reliability of the system is improved, the service life of the system is prolonged, power factors of the system are greatly improved, and the power factors reach 0.998 in the stable status. A ZCS resonance circuit is adopted in the charger, soft switching of a switching element is achieved by controlling the matching of the communicating time of a Q1 and a Q4 and the resonant periods of a Cr and an Lr, and therefore the efficiency of the convertor is greatly improved. A switching tube Q2 and a switching tube Q3, and a switching tube Q5 and a switching tube Q6 form two bridge arms of an inverter circuit respectively, full-control type inversion is carried out by controlling communication signals of the switching tubes, and a single-phase alternating-current portable power source is provided. The requirements of the automobile charger for being small in size, light in weight and low in cost are met through the effective reuse of hardware.

Disclosed is a negative compensation type large-target-surface medium-wave refrigeration infrared continuous zooming optical system. The optical system adopts secondary imaging and continuous zoomingdesign, and optical and lens design to obtain a combination of only 10 lenses, has relatively high transmittance, improves system sensitivity, and effectively controls the total length of the opticalsystem; by adopting a cylindrical cam to control motion of a zoom group and a compensation group, the advantage of a simple compensation structure is achieved; a field diaphragm structure is added, sothat influence of stray light on the imaging of the system is reduced, and the signal-to-noise ratio of the system is improved; cold diaphragm is adopted, and the realization efficiency is 100%, so that the light beam energy loss is reduced, and the system sensitivity is improved; the optical axis direction of the system is changed through two plane reflecting mirrors, so that the total length ofthe optical system is shortened effectively; and the continuous zooming optical system has the advantages of high imaging quality, short optical total length, simple zoom and compensation structure,high signal-to-noise ratio and high sensitivity, and fills up the blank of a continuous zoom optical system applicable to a 1280*1024 large target surface and medium-wave refrigeration type detector in China.

The invention discloses a water discharging device which comprises a water feeding mechanism, a flow distributing mechanism and a flow guiding mechanism rotatably connected with the water feeding mechanism. The flow distributing mechanism is arranged in the water feeding mechanism and is arranged in a way of penetrating through the axis of the flow guiding mechanism; the water feeding mechanism comprises a water feeding channel; the flow distributing mechanism comprises a first water discharging channel; the flow guiding mechanism comprises a second water discharging channel and a third waterdischarging channel; and when the flow guiding mechanism moves relative to the flow distributing mechanism, the water feeding channel communicates with the first water discharging channel, the secondwater discharging channel or the third water discharging channel. The invention provides the water discharging device capable of switching various forms of a water flow, and the water discharging device realizes water discharging with three functions within a limited space, and is small in volume and rich in functions.

The invention discloses a multifunctional water outlet device which comprises a first cavity, a second cavity and a flow dividing mechanism. The first cavity comprises a water inlet channel and a first water outlet channel. The flow dividing mechanism comprises a second water outlet channel. The flow dividing mechanism penetrates through the axis of the first cavity. The water inlet channel communicates with at least one of the first water outlet channel and the second water outlet channel in the moving process of the flow dividing mechanism relative to the first cavity. When the water inlet channel communicates with the first water outlet channel, secondary flow dividing is carried out through the second cavity. According to the multifunctional water outlet device, through the movement ofthe flow dividing mechanism in the axial direction and the movement of the second cavity in the circumferential direction, outlet water of a water tap is divided twice, so that three kinds of functional water are realized, and the water outlet function of the water outlet device is enriched.

The invention relates to the field of micro-electro mechanical system packaging and especially relates to a wafer packaging structure for an infrared focal plane array. The wafer packaging structure comprises an infrared detector chip, an infrared window and a lens, wherein the infrared focal plane array is arranged on the infrared detector chip; the infrared window is arranged on the infrared detector chip; an edge of the infrared window is in sealed connection with the edge of the infrared detector chip, so as to form a vacuum chamber for performing vacuum airtight sealing on the infrared focal plane array; the lens is arranged above the infrared window; the edge of the lens is in sealed connection with the edge of the infrared window. The wafer packaging structure for the infrared focal plane array, provided by the invention, has the advantages of small volume, low cost and large-scale production on the basis of a semiconductor technology; optical element integration is realized at wafer level; the requirements of commercial and consuming level applications for cost, volume and production scale can be met.

The invention relates to a cable trench structure laid on a power transmission line, in particular to a power transmission line recessed assembled cable trench and a laying method thereof. The cable trench is characterized in that the cable trench comprises plural trench bodies connected end to end successively; each trench body has a recessed cross section and comprises a bottom plate and two side plates; trench cable bearer pre-embedded members are pre-embedded into the inner sides of the two side plates and are vertical to the bottom plate; the front end face of each trench body is provided with a tenon, the rear end face of each trench body is provided with a mortise, the tenon is connected with the mortise on the rear end face of a previous trench body and the mortise is connected with the tenon on the front end face of a following trench body so that an end-to-end structure is formed; water-swellable rubber bars are pressed in gaps in the mortise joints; each trench body is fixedly connected with the previous and following trench bodies through plural single-head bolts. The cable trench decreases the work amount of construction, shortens a construction period, increases the efficiency of long-distance transportation, reduces construction cost, and is expanded in application range in transmission line projects.

The invention relates to a filter and a coal mine underground water purification system thereof; the filter comprises two filter side plates, a filter shell and a filter screen, and the two filter side plates are respectively fixed at openings at two sides of the filter shell; an overflow shell is mounted at the top of the filter shell, an overflow weir is formed between the inner side of the overflow shell and the outer wall of the filter shell and communicates with the top of a water collecting tank in the water collecting shell, the bottom of the water collecting tank communicates with oneend of an overflow pipe, and the other end of the overflow pipe communicates with a purification water inlet pipe of a secondary purification module; a hollow filter cavity is formed in the filter shell, a V-shaped groove with the width gradually decreased from top to bottom is formed in the bottom of the filter cavity, a sludge auger is arranged in the V-shaped groove, a sludge auger shaft is fixedly sleeved with the sludge auger, and one end of the sludge auger shaft penetrates out of the filter shell and then is fixedly assembled with an output shaft of a sludge auger motor; countless through filter holes are formed in the filter screen, and a filter drain pipe is arranged above the filter screen and is used for conveying water filtered by the filter screen to a purification water inletpipe of a main purification module.

The invention provides an open-cell organosilicon surfactant and a preparation method and application thereof, and high-resilience foam, belonging to the technical field of surfactants. The open-cellorganosilicon surfactant comprises the following raw materials in percentage by weight: 5 to 20% of a component A, 5 to 20% of a component B, 1 to 10% of a component C, 30 to 59% of a component D and30 to 50% of a component E, wherein the component A has a structural formula as shown in the specification; the component B has a structural formula as shown in the specification; the component C hasa structural formula as shown in the specification; and the component D and the component E are copolymers with terminal hydroxyl groups derived from polyhydroxy compounds. The surfactant can be usedfor effectively regulating and controlling the cell opening property and the stability of a polyurethane high-resilience foam body. The preparation method may comprise a step of mixing the five components. The method is simple, easy to operate and suitable for industrial production. When the open-cell organosilicon surfactant is used for preparing the high-resilience foam, the size stability of the high-resilience polyurethane foam can be effectively regulated and controlled.

A connection method for laminated circuit boards of a moonlet three-line-array camera relates to the technology of the laminated connection of a plurality of circuit boards, and particularly to an implement method that four sides of a circuit board are all provided with connectors, and single-row connectors with less cores are required to be used to make up multi-row connectors with more cores, and mainly aims to solve the problem that the conventional connection method is difficult to realize. The method conducts two-dimensional fixing for the socket part above the connectors through a contact pin tooling, conducts two dimensional fixing for the contact pin part below the connectors through a protective cover tooling, and meanwhile adopts a simple right-angled tooling to guarantee the verticality of the connectors; then the adjustment for relative positions of connectors of all layers of the circuit boards is conducted through a trial assembly after each single-row connector with less cores is subjected to single point welding; finally, the laminated connection between the plurality of circuit boards is finished.

The invention discloses a dodging structure and a dodging system. The dodging structure comprises a dodging substrate, wherein the dodging substrate comprises a substrate body, a first pattern structure arranged at any surface of the substrate body, and a reflection layer arranged at one side of any surface of the dodging substrate, wherein the first pattern structure comprises multiple micro structures used for dodging incident light beams irradiated on the surface, and a reflection face of the reflection layer faces towards the dodging substrate. The any surface of the dodging substrate is provided with the reflection layer, when the incident light beam irradiates one side surface of the dodging substrate having no reflection layer, part of the light is reflected by the surface, the part light flows into the surface of the reflection layer and then is reflected out of the dodging substrate, and the light beams is the light beams after secondary reflection after being dodged by the dodging structure. Through the structure, the incident Gauss distribution light beams are shaped into flat-topped distribution light beams, the light beam diffusion angle is small, light beam collection is facilitated, and requirements of small volume and light mass for a display system are satisfied.

The columnar heat pipe has sealed vacuum cavity comprising gas exhaust pipe, top cover, tube and bottom board; and has bottom board below the tube, step in the upper end of the tube, capillary cover mounted in the step, top cover on the capillary cover, sealed gas exhaust pipe on the top cover, sintered porous capillary layer in the inner wall of the tube and the inner surface of the bottom board to form work liquid circulating passage together with the capillary cover and work liquid adsorbed to the sintered layer and the capillary cover. The present invention has the beneficial effects caused by the phase change heat transfer of the evaporation and condesation of work fluid inside the columnar heat pipe, including fast heat transfer rate, great heat transfer capacity, homogeneous temperature, high stability, etc.

The invention discloses a dual-purpose plate used for drying and air drying of mangrove samples, and is used for the field of drying and air drying devices. The plate comprises a square plate body provided with surrounding edges and a plurality of baffle boards arranged inside the square plate body, wherein the baffle boards comprise horizontal baffle boards and vertical baffle boards which are mutually perpendicular; the horizontal baffle boards and the vertical baffle boards are arranged in a crossing manner and separate the square plate body into a plurality of spaces; a plurality of mutually buckled inserting grooves are formed in an upper side of each horizontal baffle board and a lower side of each vertical baffle board in the length direction. According to the invention, the size of the plate is in fit with an integrated square plate body in the size of a drying oven; the square plate body is separated by the horizontal baffle boards and the vertical baffle boards into the plurality of spaces for placing the mangrove samples; sizes of the spaces can be changed by adjusting quantity and/or positions of the horizontal baffle boards or the vertical baffle boards to meet requirements of different sizes and weights of the mangrove samples and avoid the assembly of all kinds square plate bodies with different sizes; therefore, the confined space of the drying oven is better utilized, and smooth progress of drying and air-drying operations is facilitated.

The invention provides a low-cost autonomous navigation device and a navigation method for communication assisted positioning. The low-cost autonomous navigation device comprises mobile autonomous navigation equipment and ground communication base station equipment. The mobile autonomous navigation equipment comprises an autonomous navigation module, a communication auxiliary positioning module and a power supply module, and the autonomous navigation module comprises a gyroscope, an accelerometer, a magnetometer, a barometric altimeter, a microprocessor and a peripheral circuit; the communication auxiliary positioning module comprises a signal encoder, a power amplifier, a signal demodulator, a signal synchronization and timer, a radio station antenna and a communication serial port. The mobile autonomous navigation equipment is powered on before the carrier is launched, receives binding data of the ground communication base station device, and completes functions of multi-sensor dataacquisition, communication auxiliary positioning information calculation, multi-source information fusion filtering navigation and the like after the carrier is launched. The mobile autonomous navigation equipment adopts a low-cost and light design method, and can adapt to autonomous navigation and precise guidance combat tasks under the condition of satellite navigation signal loss in a modern war environment.

The invention discloses a form relieved tooth radiator and a manufacturing process thereof, the form relieved tooth radiator comprises a mounting part and a radiating part, the radiating part is located on the upper surface of the mounting part, the radiating part comprises a plurality of corrugated form relieved teeth arranged in an array, a certain angle is formed between the corrugated form relieved teeth and the mounting part, and the surfaces of the corrugated form relieved teeth are wavy; and clamping grooves are formed in the two sides of the mounting part, and a plurality of groups of mounting grooves are formed in the lower surface of the mounting part. The form relieved tooth radiator is simple in structure and convenient to machine, the product base material can be produced in batches at low cost only through extrusion forming of a profile mold, and the corrugated relieved teeth of the radiating part can be produced into corrugated relieved teeth with different angles and different heights only through corrugated relieved tooth cutters with different angles so as to meet household appliances with various sizes and radiating requirements. The heat dissipation area of the heat dissipation part can be greatly increased through the corrugated form relieved teeth arranged at the inclined angle and the wavy lines on the surfaces of the corrugated form relieved teeth. The structure is simple, and the reserved mounting grooves and clamping grooves can be quickly assembled and disassembled.

The invention provides an unmanned combat vehicle control system time trigger bus. According to the system, a fault-tolerant protocol based on time triggering is adopted, and redundant nodes and redundant functions are supported to be implemented on a plurality of nodes. The operation of the communication control chip is based on a time reference established by a fault-tolerant high-precision global clock, wherein the bus communication control hardware comprises bus monitoring. When a failure node appears in the system, normal communication of other nodes is not influenced. The main control system adopts a dual-redundancy design, control tasks are completely undertaken by a normal main control system when one of the main control systems fails, chassis control and energy control adopt a multi-redundancy and multi-node design, and the problem that the unmanned vehicle cannot run due to a single failure is avoided. The time-triggered bus adopts a dual-redundancy design to improve the reliability. The calculation task of the autonomous unit is undertaken by an independent controller, and the bus further comprises a sensing system, a gun control system, an auxiliary system and the like. The unmanned chariot control system time trigger bus can meet the technical characteristics of high data volume, high real-time performance and the like of a new generation unmanned chariot control system bus.

The invention discloses a purification module and a coal mine underground water purification system thereof. The purification module comprises a mixing tank, a stirring tank and a settling tank; wherein the stirring tank comprises a stirring tank body, and a hollow stirring inner cavity is formed in the stirring tank body; a third mounting disc, a second mounting disc, a stirring wheel, a swingingdisc, another stirring wheel and a first mounting disc are sequentially mounted in the stirring inner cavity from bottom to top; the third mounting disc and the bottom of the stirring shaft can be circumferentially and rotationally assembled; the second mounting disc, the first mounting disc and the stirring drum can be circumferentially and rotationally assembled; the two stirring wheels sleevethe stirring drum in an axially slidably and circumferentially unrotatably matched manner; the swing disc is sleeved and fixed outside the mixing drum; a through stirring barrel drainage groove is further formed in the position, close to the first mounting disc, of the stirring barrel, a hollow stirring inner barrel is arranged in the stirring barrel, a water pumping auger is mounted in the stirring inner barrel, and the outer edge of the water pumping auger is tightly attached to the inner wall of the stirring inner barrel in a sealed mode and fixed to the stirring shaft in a sleeving mode.

The invention discloses a power amplifier chip biasing circuit based on a GaAs HBT process, and relates to a new generation information technology, thereby solving a problem that in the prior art, a temperature compensation means has negative effects on size, power and the like. A diode and a first resistor are used for obtaining temperature induction resistance; meanwhile, a plurality of HBT tubes are connected in series to replace traditional resistors, a bias voltage is led out from each HBT tube, and multi-order positive temperature coefficient voltage output is achieved. Furthermore, thevoltage is converted through a current mirror and a positive temperature coefficient second resistor, and a bias current for temperature drift suppression is provided for the power amplifier chip. Andthe requirements of mobile equipment on high integration level, high power output, high stability and low cost are effectively met. Therefore, strict requirements of the power amplifier chip of the mobile equipment in the aspects of size, power consumption, long-term sustainable work and the like can be met with very low complexity and relatively high reliability in the aspect of implementation,and the power amplifier chip biasing circuit has a good popularization value.