CN102509901A - Phased-array antenna applied to ETC (Electronic Toll Collection) system and application method thereof - Google Patents
Phased-array antenna applied to ETC (Electronic Toll Collection) system and application method thereof Download PDFInfo
- Publication number
- CN102509901A CN102509901A CN2011103660353A CN201110366035A CN102509901A CN 102509901 A CN102509901 A CN 102509901A CN 2011103660353 A CN2011103660353 A CN 2011103660353A CN 201110366035 A CN201110366035 A CN 201110366035A CN 102509901 A CN102509901 A CN 102509901A
- Authority
- CN
- China
- Prior art keywords
- array
- antenna
- phase
- vehicle
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a phased-array antenna applied to an ETC (Electronic Toll Collection) system. The phased-array antenna applied to the ETC system comprises a transmitting antenna array, a receiving antenna array, a phased-array transmitting assembly, a phased-array receiving assembly, a waveform control interface, a communication control module, a ground sensing interface, a vehicle speed computing module, a vehicle tracking module, a power supply communication adaptor and a safety certificate module, wherein the transmitting antenna array is composed of antenna subarrays; the receiving antenna array is composed of antenna subarrays; and the communication control module is used for collecting a ground sensing coil signal, estimating the position and speed of a vehicle in real time, working out a waveform control command, and respectively controlling phase positions and amplitudes of each path of radio-frequency signals of the phased-array transmitting assembly and the phased-array receiving assembly so as to form a radio-frequency beam for tracking the vehicle in space. The invention also discloses an application method. According to the invention, dynamic and long-distance continued communication is realized, vehicle-following interference is eliminated, the transaction success rate is improved, the traffic speed is improved, the use efficiency of the ETC system and cost performance for construction are improved, and the construction cost is reduced.
Description
Technical field
The present invention relates to the technical field of electronic charging system without parking, is the phased array antenna and the method for using thereof of a kind of ETC of being applied to system specifically.
Background technology
ETC system (Electronic Toll Collection System) uses DSRC junction service (Dedicated Short Communication) technology and carries out the wireless data communication between vehicle and the charge station; Carry out charge data through the computer networking and handle, charge automatically realizes not stopping.
ETC system front end equipment mainly is made up of roadside unit RSU (Raod Side Unit) and board units OBU (On Braod Unit).Use the ETC system, the car owner just without people's processing fee, need not be stopped during through charge station as long as OBU is installed and the expense or bind with bank account of prestoring on vehicle window, and expense will be removed by bales catch from OBU.Adopt the charge passage of this Fare Collection System, its traffic capacity is 5 to 10 times of manual toll collection passage.The toll station that it is particularly suitable for heavy traffic uses.China ETC systematic research and enforcement has in recent years obtained certain progress.But some performance is still waiting to optimize, improve, and mainly show: the speed that 1) is open to traffic and unattended contradiction solve bad.The preposition unattended operation of realizing of railing, but the speed that is open to traffic is too slow.2) the railing postposition speed that is open to traffic is fast, be strayed into vehicle and Fail Transaction vehicle but need Attended mode to handle.3) adopt a plurality of antennas to solve this problem at present mostly, but this has brought rolling up of construction cost.4) solve bad with the car interference problem.Communications zone is big to be helped improving the speed that is open to traffic, and disturbs but can increase with car, and the probability that put upside down the car position before and after causing raises.Communications zone is little, can prevent to disturb with car, but car speed is when very fast, and the probability of Fail Transaction can increase.
The antenna performance of using in the ETC system at present can not be given full play to the usefulness of automatic the lane in which the drivers should pay fees; Can not satisfy the demand of actual engineering fully; Be necessary to come the performance of existing antenna is improved through the design of advanced person's innovation; Increase pressure day by day to alleviate vehicle flowrate, improve ETC and improve the ETC system effectiveness Fare Collection System.
Summary of the invention
The phased array antenna that the purpose of this invention is to provide a kind of ETC of being applied to system; Realize the communication continuously of dynamically long distance, eliminate with car and disturb, improve the Transaction Success rate; Improve the speed that is open to traffic; Improve the service efficiency of ETC system, improve the cost performance that the ETC system builds, reduce the construction cost of ETC system.
The present invention realizes through following technical proposals.
A kind of phased array antenna that is applied to the ETC system; It is characterized in that: the phased array antenna of the said ETC of being applied to system comprises launching antenna array that is made up of the antenna submatrix and the receiving antenna array that is made up of the antenna submatrix; And phase array emitting module and phase array receiving unit, ripple control interface, communication control module, feel interface, speed of a motor vehicle computing module, vehicle tracking module, power supply communications adapter and security authentication module, the antenna submatrix of launching antenna array and the antenna submatrix of receiving antenna array are connected to each road radiofrequency signal processing unit of phase array emitting module and phase array receiving unit respectively through feeder network, through to phase shifter in the radio frequency signal processing unit and attenuator assignment; Realization is to the phase place and the amplitude control of each antenna submatrix; Communication control module is responsible for coding/decoding, modulating/demodulating, the control of HDLC/DSRC communication flow process of base band, simultaneously, gathers the ground induction coil interface signal; Estimating vehicle position and speed; Calculate efferent echo control instruction,, control each road phase shifter and attenuator of phase array emitting module and phase array receiving unit respectively through the ripple control interface; Realize wave beam tracking vehicle; Power supply communications adapter and security authentication module are realized that antenna is connected with wired telecommunication of host computer, and security authentication module PSAM card are installed.
Launching antenna array and receiving antenna array constitute by microstrip antenna, and wherein microstrip antenna is on a thin-medium base material, and one side is that metal foil layer is as ground plate; The another side photoetching corrosion goes out metal patch, utilizes microstrip line and axis probe to the paster feed, and paster is by regularly arranged and feed; And the phase place of paster feed and the control of intensity real-time regulated; Constitute said launching antenna array and receiving antenna array, paster adopts rectangular microband paste, and realizes circular polarization through the corner cut technology; The paster quantity of launching antenna array and receiving antenna array requires to confirm according to beamwidth and minor level.
Launching antenna array and receiving antenna array all with 1x6 or 1x8 microstrip antenna submatrix as foundation structure, constitute micro-strip antenna array by 4～10 submatrixs, the excitation phase of each submatrix and excitation amplitude be controllable adjustable respectively; Form the digital beam of one-dimensional scanning; Wherein the paster in the microstrip antenna submatrix and all submatrixs all adopt the Taylor series distribution function to carry out amplitude weighting, and there is following relationship in the deflection angle of said phase shifter phase shift value and wave beam: dsin θ=λ Φ/2 π; Wherein: θ is that wave beam deflection angle and unit are radian; Φ is that phase shifter phase shift value and unit are radian, and d is that spacing and the unit between submatrix is mm, and λ is that wavelength and unit are mm; Attenuator is according to the assignment of Taylor's distribution function weighted calculation attenuator.
Said phase array emitting module is made up of the multi-channel rf signal processing unit, from the pumping signal of communication control module, through power splitter each road radiofrequency signal processing unit of feeding respectively; The radiofrequency signal processing unit is made up of amplifier, phase shifter, attenuator and power amplifier, and wherein phase shifter and attenuator carry out phase shift and decay according to the ripple control instruction of ripple control interface to radiofrequency signal; After power amplification, present respectively to each road transmitting antenna submatrix, form beam scanning in the space; Said phase array receiving unit is made up of the multi-channel rf signal processing unit; From the radiofrequency signal of each road reception antenna submatrix, be input to each corresponding radiofrequency signal processing unit respectively, the radiofrequency signal processing unit is made up of low-noise preamplifier, phase shifter, attenuator and amplifier; Wherein phase shifter and attenuator are according to the ripple control instruction of ripple control interface; Radiofrequency signal is carried out phase shift and decay, and radiofrequency signal after treatment is vector superposed by power splitter, forms the directivity of signal space is selected; Output to communication control module again and carry out down-conversion, demodulation sign indicating number, obtain base band data.
Said communication control module is 16 embedded ARM processor; Built-in FLASH and have radio frequency PLL initialization, HDLC communications protocol, the control of DSRC flow process, upper machine communication agreement, feel interface and vehicle location and velocity estimation, phase array ripple control instruction algorithm and each application program of safety authentication protocol; Wherein the HDLC communication interface is exported downgoing baseband data TX; Be modulated on the 5.8GHz carrier wave with the ASK mode through the integrated radiating circuit of RF; Produce the excitation input of radio frequency output as the phase array emitting module; The radiofrequency signal of phase array receiving unit output through the integrated receiving circuit down-conversion of RF, demodulate uplink baseband data RX, and gets into the arm processor decoding through the HDLC communication interface.
Said launching antenna array and receiving antenna array make launching antenna array and the shared antenna array of receiving antenna array through a circulator.
The present invention also provides a kind of method of using aforementioned applications in the phased array antenna of ETC system, and wherein ground induction coil is provided with first ground induction coil, second ground induction coil, three locations sense coil and the 4th ground induction coil,
1) confirm vehicle location through the ground induction coil interface signal, when vehicle gets into first ground induction coil, radio frequency beam is aimed at front part of vehicle, sends radio beacon, wakes the electronic tag on the car up, sets up communication link and gets into charge flow process automatically;
2) communication control module is gathered the ground induction coil interface signal, when detecting the signal that vehicle gets into second ground induction coil, calculates Vehicle Speed, through phase array wave beam control algolithm, draws phase shifter and attenuator control data in real time, i.e. ripple control instruction;
3) the ripple control is instructed and is passed through a ripple control interface input phase array receipts/assembly, and each road receipts/assembly is right
The present invention has broken the key technology bottleneck that the ETC industry runs in practical application; Solve the major technique obstacle that electronic charging system without parking runs in propelling; Promote the stable development of China ETC industry, promote that the highway communication industry is intelligent more, environmental protection more.
Description of drawings
Fig. 1 is applied to the phased array antenna system schematic diagram of ETC system for the present invention;
Fig. 2 is applied to the phased array antenna communication control module schematic diagram of ETC system for the present invention;
Fig. 3 is applied to the phased array antenna phase array emitting module schematic diagram of ETC system for the present invention;
Fig. 4 is applied to the phased array antenna phase array receiving unit schematic diagram of ETC system for the present invention;
Fig. 5 is applied to the phased array antenna launching antenna array and the receiving antenna array structure chart of ETC system for the present invention;
Fig. 6 is applied to the phased array antenna phase array antenna beam scanning theory figure of ETC system for the present invention;
Fig. 7 is applied to the basic composition of the phased array antenna phased array antenna of ETC system for the present invention.
Embodiment
The phased array antenna that is applied to the ETC system in the face of the present invention down describes in further detail.
Like Fig. 1, a kind of phased array antenna that is applied to the ETC system of the present invention is applied to the phased array antenna of ETC system; Comprise the launching antenna array that constitutes by the antenna submatrix and the receiving antenna array that constitutes by the antenna submatrix, and phase array emitting module and phase array receiving unit, ripple control interface, communication control module, feel interface, speed of a motor vehicle computing module, vehicle tracking module, power supply communications adapter and security authentication module, wherein launching antenna array and receiving antenna array pass through circulator; Launching antenna array and receiving antenna array can shared antenna arrays; The antenna submatrix of launching antenna array and the antenna submatrix of receiving antenna array are connected to each road radiofrequency signal processing unit of phase array emitting module and phase array receiving unit respectively through feeder network, through to phase shifter in the radio frequency signal processing unit and attenuator assignment; Realization is to the phase place and the amplitude control of each antenna submatrix; Communication control module is responsible for coding/decoding, modulating/demodulating, the control of HDLC/DSRC communication flow process of base band, simultaneously, gathers the ground induction coil interface signal; Estimating vehicle position and speed; Calculate efferent echo control instruction,, control each road phase shifter and attenuator of phase array emitting module and phase array receiving unit respectively through the ripple control interface; Realize wave beam tracking vehicle; Power supply communications adapter and security authentication module are realized that antenna is connected with wired telecommunication of host computer, and security authentication module PSAM card are installed.More particularly; Launching antenna array is connected with phase array receiving unit circuit with the phase array emitting module respectively with receiving antenna array; Power supply is connected with the communication control module circuit; Communication control module is connected with phase array emitting module, phase array receiving unit circuit, and communication control module is used to gather the ground induction coil interface signal, and according to the vehicle estimating vehicle position and the speed that enter into ground induction coil; Through handling real-time efferent echo control instruction and through the ripple control interface; Control the phase place and the amplitude of phase array emitting module and phase array receiving unit respectively, the ripple control interface becomes phase array emitting module and the needed parallel ripple control instruction of phase array receiving unit with the serial ripple control instruction transformation of communication control module output, and phase array emitting module and phase array receiving unit are respectively through the ripple control interface; Receive the vehicle tracking ripple control instruction that communication control module sends; Form the radio frequency beam of following the tracks of vehicle, the electronic tag in guaranteeing to advance at a high speed on the car is in the communications zone all the time, realizes communication applications requirement reliably continuously in the communications zone.
Like Fig. 5; Launching antenna array and receiving antenna array constitute by microstrip antenna; Launching antenna array and receiving antenna array all with 1x6 or 1x8 microstrip antenna submatrix as foundation structure, constitute micro-strip antenna array by 4～10 submatrixs, the excitation phase of a plurality of submatrixs and excitation amplitude be controllable adjustable respectively; Forming the scanning of one dimension digital beam promptly is the digital beam that forms one-dimensional scanning; Wherein 6-8 paster in the microstrip antenna submatrix and a plurality of submatrix adopt the Taylor series distribution function to carry out amplitude weighting, the array sizes of launching antenna array and receiving antenna array by beamwidth the width value when the narrowest confirm that with minor level PHASE DISTRIBUTION is mainly definite according to the wave beam requirement; On the limit of active radiating element, place the not passive radiation unit of feed; Improve the impedance operator of radiating element, paster adopts rectangular microband paste, and realizes circular polarization through diagonal corner cut technology.
Like Fig. 3, the phase array emitting module is made up of 4 tunnel radiofrequency signal processing units.The radiofrequency signal RF_out of DSRC communication control module is imported as excitation; Through power splitter with the pumping signal multi-channel rf signal processing unit of feeding; The radiofrequency signal processing unit to its amplify, phase shift, decay and power amplification; Wherein phase shifter and attenuator instruct through the ripple control that the ripple control interface sends according to the DSRC communication control module; Radiofrequency signal is carried out phase shift and decay (phase place and amplitude control), and 4 the transmitting antenna submatrixs of feeding respectively of the radiofrequency signal after power amplification finally form the wave beam that meets application requirements in the space.
Like Fig. 4, the phase array receiving unit also is made up of 4 tunnel radiofrequency signal processing units.The radiofrequency signal that respectively 4 reception antenna submatrixs is received is as input; The radiofrequency signal processing unit to its amplify, phase shift, decay and power amplification; Wherein phase shifter and attenuator instruct through the ripple control that the ripple control interface sends according to the DSRC communication control module; Radiofrequency signal is carried out phase shift and decay (phase place and amplitude control), and radiofrequency signal after treatment is vector superposed by power splitter, forms the directivity of signal space is selected; Output to the DSRC communication control module again and carry out down-conversion and demodulation, solve base band data.
Use the smart requirement of vehicle tracking according to ETC, can adopt the digital phase shifter and the digital pad of 4～6 figure places.
Phase array receives and components is passed through the ripple control interface; Receive the vehicle tracking instruction that the DSRC communication control module sends; Form the radio frequency beam of following the tracks of vehicle; OBU is in the communications zone all the time on the car in guaranteeing to advance at a high speed, realizes the application requirements of the continuous reliable communicating of little communications zone, and it is a core content of the present invention.
The concrete technical indicator and the specification requirement of phase array reception and components:
Technical indicator:
Operating frequency (GHz): emission: channel 1:5.83, channel 2:5.84; Receive: channel 1:5.79, channel 2:5.80;
Bandwidth of operation :≤5MHz; T/R switching time :≤0.3us; Transmitting power: 20dBm≤Pout≤33dBm (power is adjustable by software); Emission input power: 0～3dBm; Receiving gain: 23dB≤Gain≤29dB; Noise factor: 5dB; Third order intermodulation :≤-55dBc; Spuious :≤-30dBm; Phase shifter: 6bit RMS deviation≤6 °; Attenuator: the 6bit step-length is 0.5dB; I/O standing wave :≤2: 1.
Like Fig. 2; The DSRC communication control module is 16 embedded ARM processor; The resident piece of touching of built-in FLASH; Comprise radio frequency PLL initialization, HDLC communications protocol, the control of DSRC flow process, upper machine communication agreement, feel interface and vehicle location and velocity estimation, phase array ripple control instruction algorithm and safety authentication protocol, wherein HDLC communication interface output downgoing baseband data TX is modulated on the 5.8GHz carrier wave with the ASK mode through the integrated radiating circuit of RF; Produce the excitation input of radio frequency output as the phase array emitting module; Phase array receiving unit output radiofrequency signal through the integrated receiving circuit down-conversion of RF, demodulate uplink baseband data RX, and gets into arm processor through the HDLC communication interface.Communication control module is arranged the bidirectional safe authentication of the fiscard standard PBOC of People's Bank of China in the DSRC transaction flow, guarantee the fail safe of consumption and payment system.
The present invention also provides the method for using of the phased array antenna of a kind of ETC of being applied to system; Wherein ground induction coil is provided with first ground induction coil, second ground induction coil, three locations sense coil and the 4th ground induction coil (if adopt the less ground induction coil of size, also more ground induction coil can be set).
1) confirm vehicle location through the ground induction coil interface signal, when vehicle gets into first ground induction coil, radio frequency beam is aimed at front part of vehicle, sends radio beacon, wakes the electronic tag on the car up, sets up communication link and gets into charge flow process automatically;
2) communication control module is gathered the ground induction coil interface signal, when detecting the signal that vehicle gets into second ground induction coil, calculates Vehicle Speed, through phase array ripple control algorithm, draws phase shifter and attenuator control data in real time, i.e. ripple control instruction;
3) assembly is received/sent out to ripple control instruction through ripple control interface input phase array; Each road is received/is sent out assembly and exchanges the microwave signal that is shaped on base band data; According to ripple control instruction carry out phase shift/decay be phase place control with amplitude, again after power amplification, the corresponding antenna of feeding respectively submatrix, formation digital beam;
4) digital beam real-time tracking vehicle moves ahead, if vehicle to three locations senses coil, the flow process of charging does not automatically also finish, communication control module continues to calculate and upgrades vehicle location, speed and ripple control instruction, till digital beam moves in front of the railing;
5) front truck is charged after flow process accomplishes automatically; Communication control module is followed according to the ground induction coil interface signal and is judged second car position and travel speed; Through phase array wave beam control algolithm; Calculate the phase shifter and the attenuator control command of corresponding second car position in real time, it is anterior that digital beam points to second car, the automatic charge flow process of a car before repeating.
Aforementioned waves control instruction promptly is the Serial Control instruction to phaser, attenuator, and the phase array wave beam refers to wireless scanning beam, and the control of the phase array wave beam just decay of phase place and amplitude is controlled, and algorithm is exactly the control algolithm that can obtain accurate wireless scanning beam.
Base band is meant information source (information source; Also claim to send out a terminal) send not through the raw electrical signal of ovennodulation (carrying out frequency spectrum shift and conversion) intrinsic frequency band (frequency bandwidth); Be called baseband; Be called for short base band, be meant the radiofrequency signal of the 5.82GHz that carrier wave is used among the present invention, in base band, modulate after the digital information that charge is arranged and the OBU exchange.
FLASH is a scratch pad memory, and it writes the back to application program and CPU together can executive utility.
PLL promptly refers to phase-locked loop, is used for the unified integration time pulse signal, makes the access data that internal memory can be correct
A kind of communications protocol of HDLC (H igh LevelData Link Contro).
DSRC DSRC communications protocol.
Be basic composition and the velocity of wave scanning theory that antenna array was promptly received/sent out to more detailed launching antenna array of the present invention and the receiving antenna array that is made up of the antenna submatrix below.
1, receive/send out antenna array: the present invention is with the foundation structure of 1x6 microstrip antenna submatrix as the ETC dedicated antenna.Constitute the 4x6 micro-strip antenna array by 4 submatrixs.The excitation phase of 4 submatrixs and excitation amplitude be controllable adjustable respectively, realizes the scanning of one dimension digital beam.
2, micro-strip paster antenna basic principle: microstrip antenna is on a thin-medium base material; One side is that metal foil layer is as ground plate; The another side photoetching corrosion goes out the metal patch of definite shape, utilizes microstrip line and axis probe to the paster feed, and this has just constituted microstrip antenna.Then constitute microstrip antenna array by certain regularly arranged with feed by some pasters.If but the phase place of paster feed and the control of intensity real-time regulated then constitute phased array antenna.
3, micro-strip paster antenna shape: patch shape is varied, and shape commonly used is rectangle or circular patch.Adjustment feeding classification and patch shape can realize the different polarization modes of antenna, like linear polarization or circular polarization.Adopt rectangular microband paste among the present invention, and realize circular polarization, to satisfy the polarization index requirement of ETC dedicated antenna through diagonal corner cut technology.
4, the analytical method of microstrip antenna: when microstrip antenna carries out engineering design; To estimate in advance the performance parameter (for example directional diagram, directivity factor, efficient, input impedance, polarization and frequency band etc.) of antenna; This will improve the quality and the efficient of antenna development greatly, reduce the cost of development.Carrying out of this theoretical work brought the method for multiple analysis microstrip antenna, for example transmission line, the chamber theory of modules, Green's function method, integral equation method and moment method etc.With the directional diagram of above-mentioned calculated in various ways microstrip antenna, consequently consistent, main beam particularly.The present invention utilizes microstrip transmission line basic theories, micro-strip paster antenna resonance principle and Smith chart knowwhy that this micro-strip array antenna is analyzed.
5, array antenna principle: the definition of array antenna be one type by being no less than two antenna element rules or random alignment, and obtain the particular antenna of predetermined radiation characteristic through suitable excitation.Adopt a plurality of unit to form an antenna and compare, have the more total radiation pattern of highly directive with single omnidirectional antenna units.Developing rapidly of antenna communication knowledge and technology just at present, and, all impelled the birth of new antenna in the world to the proposition of many research directions of antenna, array antenna is exactly a kind of direction of research.With regard to transmitting antenna, simple radiation source is the radiation source of common forming array antenna such as point source, symmetrical dipole source, and they are according to straight line or more complicated form; According to the antenna feed electric current; Spacing, different parameters such as electrical length come forming array, to obtain best radiation directivity.Can regulate radiation direction and intensity by certain rule according to demand, produce thus such as the smart antenna that uses in the present mobile communication, phased array antenna etc.In the near future, the antenna of these high technology contents will bring us same high-quality communication environment.The various performance parameters requirement of the micro-strip array antenna that will realize through taking all factors into consideration among the present invention, and reduce the antenna overall dimensions as much as possible, 4x6 (totally 24 unit) array antenna is adopted in decision, realizes the application demand of high efficiency high performance-price ratio ETC system.
6, array element amplitude weighting principle: same group of physical array unit can form the different antennas radiation diagram, can allow receiver adjustment main beam direction and gain like this, and effectively control the sidelobe level size, thereby realize that correct signal receives.This makes that also a kind of antenna size goes for multiple use when producing this type antenna.Promptly can set up a basic cellular construction, the radiation diagram that the unit forms can change forming of radiation diagram through the mode that adjustment unit encourages by the user.The method that realizes weighting mainly contains two kinds: a kind of be through on the unit input link, introduce the radiofrequency signal gain controller (such as, gain adjustable amplifier or programmable signal attenuator etc.); Another kind is to realize carrying out power division according to different proportion through feeding network.The main algorithm of weighting: weighting algorithm commonly used has Chebyshev's distribution function (Chebyshev), Taylor's distribution function (Taylor) and cosine distribution function (Cosine-on-pedestal) etc.Decision at first adopts the Taylor series distribution function that 6 pasters and 4 submatrixs in the microstrip antenna submatrix are carried out amplitude weighting among the present invention; Through rigorous impedance matching and feeding classification; The input power of each unit of reasonable distribution; Improve the directive gain of antenna main lobe to reach, improve the directivity of antenna, reduce the purpose of sidelobe level amplitude.
7, micro-strip array antenna emulation: emulation mode commonly used comprises genetic algorithm, neural net, limited element analysis technique and Finite-Difference Time-Domain Method etc.Along with the fast development of the commercial simulation software of electromagnetic field, a lot of outstanding emulation tools with Ansoft HFSS, CST Studio, IE3D and ADS Momentum etc. have appearred.Through flexible use to these business softwares, can improve the accuracy of antenna Electromagnetic Simulation, and effectively reduce the needed time of simulation work, thereby shorten the research and development time greatly, practice thrift development cost.
8, phased array antenna basic principle: promptly be the principle of phase array wave beam control algolithm, control algolithm formula wherein: dsin θ=λ Φ/2 π can obtain the control algolithm of accurate wireless scanning beam through this formula.
Like Fig. 6-7, phased array antenna is the antenna that changes pattern shapes through the current feed phase of radiating element in the array of controls antenna.Control phase can change the peaked sensing of antenna pattern, to reach the purpose of beam scanning.Under special circumstances, also can control the shape of minor level, minimum value position and whole directional diagram, for example obtain cosecant square shape directional diagram and directional diagram is carried out adaptive control etc.
In Fig. 6, obviously there are following expression formula relation in wave beam deflection angle θ and phase shifter phase shift value Φ: dsin θ=λ Φ/2 π
Wherein: θ is a wave beam deflection angle unit: radian;
Φ is a phase shifter phase shift value unit: radian;
D is the spacing unit between submatrix: mm;
λ is wavelength unit: mm.
The calculating of the assignment of attenuator is for the level of the secondary lobe of the drawing up assignment according to Taylor's distribution function (Taylor) weighted calculation attenuator.
During with the mechanical means rotable antenna, inertia is big, speed is slow, and phased array antenna has overcome this shortcoming, and the sweep speed of wave beam is high.Its current feed phase is generally used the electronics computer control, phase change speed fast (millisecond magnitude), i.e. and the variation of antenna pattern maximum sensing or other parameters is rapid.This is the maximum characteristics of phased array antenna.Under all very big situation of antenna volume and weight, it is more convenient to use phased array antenna.Generally in order to save phase shifter and to simplify control circuit, the shared phase shifter of several sometimes radiating elements.The unit combination of a shared phase shifter is called submatrix.
The Primary Component of phased array antenna is phase shifter and antenna radiation unit.Phase shifter divides two kinds of continous way phase shifter and digital phase shifters.The phase shift value of continous way phase shifter can change in 0 °～360 ° scopes continuously, and the phase shift value of digital phase shifter disperses, and can only be the integral multiple of 360 * 1/2n degree, and n is the figure place of digital phase shifter in the formula.For example the phase shift value of 3 bit digital formula phase shifters can only be 45 °, 90 °, 135 °, 180 °, 225 °, 270 °, 315 ° and 360 °.Phase shifter should guarantee in certain frequency range to obtain needed phase shift value, also need satisfy requirements such as certain anti-power and temperature stability simultaneously, can be in operate as normal on the different frequency and under the environmental condition of variation to guarantee phased array antenna.
The design of antenna radiation unit should make the variation of the input impedance in certain phase shift range interior (or in beam scanning scope) and the certain frequency scope as far as possible little; To guarantee the transmitter operate as normal, prevent to occur occurring in parasite sidelobe and the directional diagram phenomenon of concave point (blind spot) owing to the repeatedly reflection of radiofrequency signal.For this reason, can adopt the little unit of mutual coupling or take the special measure of decoupling.
Feeding classification: the feeding classification of phased array antenna is divided two kinds of transmission line feed and space electricity-feedings.Under the transmission line feeding classification, RF energy is given radiating element through waveguide, coaxial line and microstrip line microwave transmission line feeds such as (seeing a microstrip line and a type microstrip line).Phase shifter places in the microwave transmission circuit.Under the space electricity-feeding mode; The RF energy that transmitter produces passes through the radiation appliance radiation to free space; Receive the battle array reception by one after transmitting a segment distance; Receive each unit or one group of signal that the unit is received of battle array, the transmitter unit of the emission battle array of feeding again after the phase shift of process phase shifter also radiate.In this case, phase shifter is between emission battle array and reception battle array.The feeder line of space electricity-feeding is simple, receives battle array but need to increase by one.The feeder line of transmission line feed is complicated.
Design: the design of phased array antenna array itself mainly is amplitude, PHASE DISTRIBUTION design and cell impedance design.Array sizes is width value when the narrowest and minor level decision by beamwidth.PHASE DISTRIBUTION mainly requires to decide according to wave beam.Because the restriction of element pattern and impedance, planar phased array maximum scan scope is ± 60 ° a circular cone usually, adds that also can obtain hemisphere behind the ball cover lens scans.
If only required direction figure maximum is in spatial movement (scanning), only need to form the PHASE DISTRIBUTION of linear change.At this moment the maximum direction of directional diagram is perpendicular to equiphase surface.When using digital phase shifter, except several special angle, generally can not get accurate linear phase and distribute.At this moment on some direction of directional diagram, parasite sidelobe can occur, its size is relevant with concrete PHASE DISTRIBUTION rule.In order to satisfy specific (special) requirements, then need adopt the Pattern Synthesis method, calculate required front PHASE DISTRIBUTION in advance.For example; Can front be divided into several zones; All regard each zone as directional diagram that front independently designs this gust, so just can obtain a plurality of simultaneous wave beams, also can utilize special PHASE DISTRIBUTION that directional diagram is broadened or form cosecant square shape directional diagram in the space.
In order to simplify feed structure, some phased array antenna such as is at an amplitude.The high shortcoming of minor level can adopt Density Weighted when distributing in order to overcome constant amplitude, i.e. the distribution of active radiating element on front is uneven, and its distribution density changes according to certain rules.On the limit of active radiating element, place the not passive radiation unit of feed, to improve the impedance operator of radiating element.
The quantity of phased array antenna radiating element is many, when the disabling unit number 5% little to the antenna array Effect on Performance when following, thereby reliability is higher.
Along with the development of microwave integrated circuit technology and the appearance of novel phase shifter, the cost of phased array antenna just constantly descends, and volume is more and more littler, and weight is also further alleviating.
At first utilize the micro-strip paster antenna principle to estimate patch size among the present invention; And pass through corner cut to realize the circular polarization requirement; Calculate the amplitude weighting size of 24 independent radiating elements of micro-strip array antenna again through the Taylor series distribution function, utilize Ansoft HFSS simulation software to carry out emulation and optimization again.
Claims (7)
1. phased array antenna that is applied to the ETC system; It is characterized in that: the phased array antenna of the said ETC of being applied to system comprises launching antenna array that is made up of the antenna submatrix and the receiving antenna array that is made up of the antenna submatrix; And phase array emitting module and phase array receiving unit, ripple control interface, communication control module, feel interface, speed of a motor vehicle computing module, vehicle tracking module, power supply communications adapter and security authentication module
The antenna submatrix of launching antenna array and the antenna submatrix of receiving antenna array are connected to each road radiofrequency signal processing unit of phase array emitting module and phase array receiving unit respectively through feeder network; Through to phase shifter in the radio frequency signal processing unit and attenuator assignment; Realization is to the phase place and the amplitude control of each antenna submatrix
Communication control module is responsible for coding/decoding, modulating/demodulating, the control of HDLC/DSRC communication flow process of base band, simultaneously, gathers the ground induction coil interface signal; Estimating vehicle position and speed; Calculate efferent echo control instruction,, control each road phase shifter and attenuator of phase array emitting module and phase array receiving unit respectively through the ripple control interface; Realize digital beam tracking vehicle
Power supply communications adapter and security authentication module are realized that antenna is connected with wired telecommunication of host computer, and security authentication module PSAM card are installed.
2. the phased array antenna that is applied to the ETC system according to claim 1 is characterized in that: launching antenna array and receiving antenna array constitute by microstrip antenna, and wherein microstrip antenna is on a thin-medium base material; One side is that metal foil layer is as ground plate; The another side photoetching corrosion goes out metal patch, utilizes microstrip line and axis probe to the paster feed, and paster is by regularly arranged and feed; And the phase place of paster feed and the control of intensity real-time regulated; Constitute said launching antenna array and receiving antenna array, paster adopts rectangular microband paste, and realizes circular polarization through the corner cut technology; The paster quantity of launching antenna array and receiving antenna array requires to confirm according to beamwidth and minor level.
3. the phased array antenna that is applied to the ETC system according to claim 2; It is characterized in that: launching antenna array and receiving antenna array all with 1x6 or 1x8 microstrip antenna submatrix as foundation structure, constitute micro-strip antenna array by 4～10 submatrixs, the excitation phase of each submatrix and excitation amplitude be controllable adjustable respectively; Form the digital beam of one-dimensional scanning; Wherein the paster in the microstrip antenna submatrix and all submatrixs all adopt the Taylor series distribution function to carry out amplitude weighting
There is following relationship in the deflection angle of said phase shifter phase shift value and wave beam: dsin θ=λ Φ/2 π; Wherein: θ is that wave beam deflection angle and unit are radian; Φ is that phase shifter phase shift value and unit are radian, and d is that spacing and the unit between submatrix is mm, and λ is that wavelength and unit are mm; Attenuator is according to the assignment of Taylor's distribution function weighted calculation attenuator.
4. the phased array antenna that is applied to the ETC system according to claim 1 is characterized in that: said phase array emitting module is made up of the multi-channel rf signal processing unit, from the pumping signal of communication control module; Through power splitter each road radiofrequency signal processing unit of feeding respectively; The radiofrequency signal processing unit is made up of amplifier, phase shifter, attenuator and power amplifier, and wherein phase shifter and attenuator carry out phase shift and decay according to the ripple control instruction of ripple control interface to radiofrequency signal; After power amplification; Present respectively to each road transmitting antenna submatrix, form beam scanning in the space
Said phase array receiving unit is made up of the multi-channel rf signal processing unit; From the radiofrequency signal of each road reception antenna submatrix, be input to each corresponding radiofrequency signal processing unit respectively, the radiofrequency signal processing unit is made up of low-noise preamplifier, phase shifter, attenuator and amplifier; Wherein phase shifter and attenuator are according to the ripple control instruction of ripple control interface; Radiofrequency signal is carried out phase shift and decay, and radiofrequency signal after treatment is vector superposed by power splitter, forms the directivity of signal space is selected; Output to communication control module again and carry out down-conversion, demodulation sign indicating number, obtain base band data.
5. the phased array antenna that is applied to the ETC system according to claim 1; It is characterized in that: said communication control module is 16 embedded ARM processor; Built-in FLASH and have radio frequency PLL initialization, HDLC communications protocol, the control of DSRC flow process, upper machine communication agreement, feel interface and vehicle location and velocity estimation, phase array ripple control instruction algorithm and each application program of safety authentication protocol; Wherein the HDLC communication interface is exported downgoing baseband data TX; Be modulated on the 5.8GHz carrier wave with the ASK mode through the integrated radiating circuit of RF, produce the excitation input of radio frequency output, the radiofrequency signal of phase array receiving unit output as the phase array emitting module; Through the integrated receiving circuit down-conversion of RF, demodulate uplink baseband data RX, and get into the arm processor decoding through the HDLC communication interface.
6. the phased array antenna that is applied to the ETC system according to claim 1 is characterized in that: said launching antenna array and receiving antenna array make launching antenna array and the shared antenna array of receiving antenna array through a circulator.
7. method of using the phased array antenna of the described ETC of being applied to of the arbitrary claim of claim 1-6 system is characterized in that: wherein ground induction coil is provided with first ground induction coil, second ground induction coil, three locations sense coil and the 4th ground induction coil,
1) confirm vehicle location through the ground induction coil interface signal, when vehicle gets into first ground induction coil, radio frequency beam is aimed at front part of vehicle, sends radio beacon, wakes the electronic tag on the car up, sets up communication link and gets into charge flow process automatically;
2) communication control module is gathered the ground induction coil interface signal, when detecting the signal that vehicle gets into second ground induction coil, calculates Vehicle Speed, through phase array wave beam control algolithm, draws phase shifter and attenuator control data in real time, i.e. ripple control instruction;
3) assembly is received/sent out to ripple control instruction through ripple control interface input phase array; Each road is received/is sent out assembly and exchanges the microwave signal that is shaped on base band data; According to ripple control instruction carry out phase shift/decay be phase place control with amplitude, again after power amplification, the corresponding antenna of feeding respectively submatrix, formation digital beam;
4) digital beam real-time tracking vehicle moves ahead, if vehicle to three locations senses coil, the flow process of charging does not automatically also finish, communication control module continues to calculate and upgrades vehicle location, speed and ripple control instruction, till digital beam moves in front of the railing;
5) after the vehicle of front is accomplished the flow process of charging automatically; Communication control module is followed according to the ground induction coil interface signal and is judged second car position and travel speed; Through phase array wave beam control algolithm; Calculate the phase shifter and the attenuator control command of corresponding second car position in real time, it is anterior that digital beam points to second car, the automatic charge flow process of a car before repeating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103660353A CN102509901B (en) | 2011-11-16 | 2011-11-16 | Phased-array antenna applied to ETC (Electronic Toll Collection) system and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103660353A CN102509901B (en) | 2011-11-16 | 2011-11-16 | Phased-array antenna applied to ETC (Electronic Toll Collection) system and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102509901A true CN102509901A (en) | 2012-06-20 |
| CN102509901B CN102509901B (en) | 2013-11-20 |
Family
ID=46221965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103660353A Active CN102509901B (en) | 2011-11-16 | 2011-11-16 | Phased-array antenna applied to ETC (Electronic Toll Collection) system and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102509901B (en) |
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103150769A (en) * | 2013-01-05 | 2013-06-12 | 山西国强科技发展有限责任公司 | Lorry weighing overload governance and non-stop electronic toll collection two-in-one system device |
| CN103295036A (en) * | 2013-05-08 | 2013-09-11 | 岳流锋 | Phase-locked carrier wave cancellation ultrahigh-frequency radio frequency identification reader and cancellation method thereof |
| CN103606740A (en) * | 2013-10-30 | 2014-02-26 | 深圳市远望谷信息技术股份有限公司 | Device for adjustment of antenna-array beam direction and phase position in RFID reader-writer |
| CN103762422A (en) * | 2013-12-31 | 2014-04-30 | 上海科世达-华阳汽车电器有限公司 | Method and system for controlling beam direction of antenna array |
| CN104104398A (en) * | 2014-05-26 | 2014-10-15 | 北京遥测技术研究所 | Transmitting assembly circuit used for rocket-mounted S-frequency-band phased-array antenna and structure thereof |
| CN104347938A (en) * | 2013-07-26 | 2015-02-11 | 深圳市金溢科技股份有限公司 | Antenna unit, antenna array and road side unit |
| CN104680235A (en) * | 2015-03-03 | 2015-06-03 | 江苏科技大学 | Design method of resonance frequency of circular microstrip antenna |
| CN105721000A (en) * | 2015-12-28 | 2016-06-29 | 深圳市华讯方舟微电子科技有限公司 | Radio-frequency transmitting module, radio-frequency transmitting component, phased-array antenna and production method thereof |
| CN105844321A (en) * | 2016-01-26 | 2016-08-10 | 乐卡汽车智能科技（北京）有限公司 | Electronic tag |
| CN106471341A (en) * | 2014-07-03 | 2017-03-01 | 菲斯灵敏创新公司 | Phased array radio frequency receptor |
| CN106842187A (en) * | 2016-12-12 | 2017-06-13 | 西南石油大学 | Positioner and its method are merged in a kind of phase-array scanning with Computer Vision |
| CN107069206A (en) * | 2017-05-24 | 2017-08-18 | 武汉拓宝科技股份有限公司 | A kind of fan-shaped beam micro-strip array antenna |
| CN108226871A (en) * | 2018-01-18 | 2018-06-29 | 西安电子工程研究所 | Diversity phased array design method based on millimeter wave collision avoidance radar |
| CN108808260A (en) * | 2018-06-06 | 2018-11-13 | 电子科技大学 | A kind of modification cylinder/spherical surface Luneberg lens antenna based on phased array feed |
| CN109343403A (en) * | 2018-10-25 | 2019-02-15 | 南通先进通信技术研究院有限公司 | A kind of analog beam scheduling controlling platform |
| CN109462040A (en) * | 2018-10-30 | 2019-03-12 | 深圳市航天华拓科技有限公司 | Phased array antenna and RFID system applied to RFID system |
| CN110070635A (en) * | 2019-05-29 | 2019-07-30 | 广州市埃特斯通讯设备有限公司 | A kind of intelligent coordinated control system |
| CN110288839A (en) * | 2019-07-30 | 2019-09-27 | 成都安杰联科技有限公司 | A kind of device and method of the detection positioning of ETC interference unit |
| CN110930526A (en) * | 2019-12-16 | 2020-03-27 | 交通运输部路网监测与应急处置中心 | Handling method and system for vehicle quitting after transaction in ETC lane |
| CN110942526A (en) * | 2019-12-16 | 2020-03-31 | 交通运输部路网监测与应急处置中心 | Processing method and system for enabling one vehicle in ETC lane to pass along with legal vehicle |
| CN110956709A (en) * | 2019-11-26 | 2020-04-03 | 广州铭创通讯科技有限公司 | ETC phased array antenna system for highway toll collection |
| CN111028371A (en) * | 2019-12-16 | 2020-04-17 | 交通运输部路网监测与应急处置中心 | Vehicle passing processing method and system for vehicle transaction and exit after identification in ETC lane |
| CN111052509A (en) * | 2017-08-30 | 2020-04-21 | 株式会社村田制作所 | Antenna module |
| CN111834746A (en) * | 2020-09-17 | 2020-10-27 | 成都知融科技股份有限公司 | Dual-polarization radio frequency front-end system |
| WO2020238996A1 (en) * | 2019-05-31 | 2020-12-03 | 华为技术有限公司 | Antenna and mobile terminal |
| CN112310659A (en) * | 2019-07-29 | 2021-02-02 | 成都恪赛科技有限公司 | Reconstructed wave beam pointing antenna array |
| CN112381959A (en) * | 2020-08-10 | 2021-02-19 | 广州汇豪计算机科技开发有限公司 | RSU equipment and working method thereof |
| CN112864636A (en) * | 2020-12-31 | 2021-05-28 | 江苏肯立科技股份有限公司 | Ultra-wideband metal Vivaldi dual-polarized antenna |
| CN112993598A (en) * | 2021-02-23 | 2021-06-18 | 中国人民解放军国防科技大学 | Low-cost transparent phased array antenna for low-orbit spacecraft |
| CN113012435A (en) * | 2021-03-26 | 2021-06-22 | 深圳市壹云智能科技有限公司 | Traffic data acquisition method and device, computer equipment and storage medium |
| CN114818592A (en) * | 2022-04-27 | 2022-07-29 | 电子科技大学 | Sparse array optimization array arrangement method under layout constraint of back feed chip |
| CN116938298A (en) * | 2023-07-21 | 2023-10-24 | 广东格林精密部件股份有限公司 | Active phased array and baseband complex digital signal processing algorithm thereof |
| CN117613538A (en) * | 2023-12-04 | 2024-02-27 | 星元信息技术(深圳)有限公司 | Method and system for realizing uniform distribution of radiation field intensity of RFID array antenna |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1416104A (en) * | 2002-04-25 | 2003-05-07 | 深圳市深港产学研数码科技有限公司 | Method for charging moving vehicle on road and system thereof |
| CN101552380A (en) * | 2009-05-12 | 2009-10-07 | 北京握奇数据系统有限公司 | A microstrip array antenna |
| CN101561940A (en) * | 2008-04-18 | 2009-10-21 | 刘明豪 | Electronic charging system without parking and with function of path recognition |
| WO2009150528A2 (en) * | 2008-06-13 | 2009-12-17 | Tmt Services And Supplies (Pty) Limited | Traffic control system and method |
| CN101764285A (en) * | 2010-01-27 | 2010-06-30 | 北京握奇数据系统有限公司 | Method for controlling antenna wave beam to point to moving vehicle, antenna and no-stop parking charge system |
-
2011
- 2011-11-16 CN CN2011103660353A patent/CN102509901B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1416104A (en) * | 2002-04-25 | 2003-05-07 | 深圳市深港产学研数码科技有限公司 | Method for charging moving vehicle on road and system thereof |
| CN101561940A (en) * | 2008-04-18 | 2009-10-21 | 刘明豪 | Electronic charging system without parking and with function of path recognition |
| WO2009150528A2 (en) * | 2008-06-13 | 2009-12-17 | Tmt Services And Supplies (Pty) Limited | Traffic control system and method |
| CN101552380A (en) * | 2009-05-12 | 2009-10-07 | 北京握奇数据系统有限公司 | A microstrip array antenna |
| CN101764285A (en) * | 2010-01-27 | 2010-06-30 | 北京握奇数据系统有限公司 | Method for controlling antenna wave beam to point to moving vehicle, antenna and no-stop parking charge system |
Cited By (48)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103150769A (en) * | 2013-01-05 | 2013-06-12 | 山西国强科技发展有限责任公司 | Lorry weighing overload governance and non-stop electronic toll collection two-in-one system device |
| CN103295036B (en) * | 2013-05-08 | 2016-09-28 | 岳流锋 | The super high frequency electronic label read/write of a kind of phase-locked carrier wave cancellation and cancellation method thereof |
| CN103295036A (en) * | 2013-05-08 | 2013-09-11 | 岳流锋 | Phase-locked carrier wave cancellation ultrahigh-frequency radio frequency identification reader and cancellation method thereof |
| CN104347938A (en) * | 2013-07-26 | 2015-02-11 | 深圳市金溢科技股份有限公司 | Antenna unit, antenna array and road side unit |
| CN103606740A (en) * | 2013-10-30 | 2014-02-26 | 深圳市远望谷信息技术股份有限公司 | Device for adjustment of antenna-array beam direction and phase position in RFID reader-writer |
| CN103606740B (en) * | 2013-10-30 | 2016-06-29 | 深圳市远望谷信息技术股份有限公司 | Regulate the device of antenna array beam direction and phase place in rfid interrogator |
| CN103762422B (en) * | 2013-12-31 | 2018-01-19 | 上海科世达-华阳汽车电器有限公司 | A kind of beam point steering method and system of aerial array |
| CN103762422A (en) * | 2013-12-31 | 2014-04-30 | 上海科世达-华阳汽车电器有限公司 | Method and system for controlling beam direction of antenna array |
| CN104104398B (en) * | 2014-05-26 | 2017-04-19 | 北京遥测技术研究所 | Transmitting assembly circuit used for rocket-mounted S-frequency-band phased-array antenna and structure thereof |
| CN104104398A (en) * | 2014-05-26 | 2014-10-15 | 北京遥测技术研究所 | Transmitting assembly circuit used for rocket-mounted S-frequency-band phased-array antenna and structure thereof |
| CN106471341A (en) * | 2014-07-03 | 2017-03-01 | 菲斯灵敏创新公司 | Phased array radio frequency receptor |
| CN104680235A (en) * | 2015-03-03 | 2015-06-03 | 江苏科技大学 | Design method of resonance frequency of circular microstrip antenna |
| CN105721000A (en) * | 2015-12-28 | 2016-06-29 | 深圳市华讯方舟微电子科技有限公司 | Radio-frequency transmitting module, radio-frequency transmitting component, phased-array antenna and production method thereof |
| CN105844321A (en) * | 2016-01-26 | 2016-08-10 | 乐卡汽车智能科技（北京）有限公司 | Electronic tag |
| CN106842187A (en) * | 2016-12-12 | 2017-06-13 | 西南石油大学 | Positioner and its method are merged in a kind of phase-array scanning with Computer Vision |
| CN107069206A (en) * | 2017-05-24 | 2017-08-18 | 武汉拓宝科技股份有限公司 | A kind of fan-shaped beam micro-strip array antenna |
| US11283150B2 (en) | 2017-08-30 | 2022-03-22 | Murata Manufacturing Co., Ltd. | Antenna module |
| CN111052509A (en) * | 2017-08-30 | 2020-04-21 | 株式会社村田制作所 | Antenna module |
| CN108226871A (en) * | 2018-01-18 | 2018-06-29 | 西安电子工程研究所 | Diversity phased array design method based on millimeter wave collision avoidance radar |
| CN108226871B (en) * | 2018-01-18 | 2021-08-10 | 西安电子工程研究所 | Diversity phased array design method based on millimeter wave collision avoidance radar |
| CN108808260B (en) * | 2018-06-06 | 2021-07-06 | 电子科技大学 | Modified cylindrical surface/spherical luneberg lens antenna based on phased array feed |
| CN108808260A (en) * | 2018-06-06 | 2018-11-13 | 电子科技大学 | A kind of modification cylinder/spherical surface Luneberg lens antenna based on phased array feed |
| CN109343403A (en) * | 2018-10-25 | 2019-02-15 | 南通先进通信技术研究院有限公司 | A kind of analog beam scheduling controlling platform |
| CN109343403B (en) * | 2018-10-25 | 2022-02-08 | 南通先进通信技术研究院有限公司 | Analog beam scheduling control platform |
| CN109462040A (en) * | 2018-10-30 | 2019-03-12 | 深圳市航天华拓科技有限公司 | Phased array antenna and RFID system applied to RFID system |
| CN110070635A (en) * | 2019-05-29 | 2019-07-30 | 广州市埃特斯通讯设备有限公司 | A kind of intelligent coordinated control system |
| WO2020238996A1 (en) * | 2019-05-31 | 2020-12-03 | 华为技术有限公司 | Antenna and mobile terminal |
| CN112310659B (en) * | 2019-07-29 | 2023-03-07 | 成都恪赛科技有限公司 | Reconstructed wave beam pointing antenna array |
| CN112310659A (en) * | 2019-07-29 | 2021-02-02 | 成都恪赛科技有限公司 | Reconstructed wave beam pointing antenna array |
| CN110288839A (en) * | 2019-07-30 | 2019-09-27 | 成都安杰联科技有限公司 | A kind of device and method of the detection positioning of ETC interference unit |
| CN110288839B (en) * | 2019-07-30 | 2022-05-17 | 成都安杰联科技有限公司 | Detection and positioning device and method for ETC (electronic toll Collection) interference unit |
| CN110956709A (en) * | 2019-11-26 | 2020-04-03 | 广州铭创通讯科技有限公司 | ETC phased array antenna system for highway toll collection |
| CN110942526B (en) * | 2019-12-16 | 2022-02-01 | 交通运输部路网监测与应急处置中心 | Processing method and system for enabling one vehicle in ETC lane to pass along with legal vehicle |
| CN111028371A (en) * | 2019-12-16 | 2020-04-17 | 交通运输部路网监测与应急处置中心 | Vehicle passing processing method and system for vehicle transaction and exit after identification in ETC lane |
| CN110930526B (en) * | 2019-12-16 | 2021-06-29 | 交通运输部路网监测与应急处置中心 | Handling method and system for vehicle quitting after transaction in ETC lane |
| CN110942526A (en) * | 2019-12-16 | 2020-03-31 | 交通运输部路网监测与应急处置中心 | Processing method and system for enabling one vehicle in ETC lane to pass along with legal vehicle |
| CN110930526A (en) * | 2019-12-16 | 2020-03-27 | 交通运输部路网监测与应急处置中心 | Handling method and system for vehicle quitting after transaction in ETC lane |
| CN112381959A (en) * | 2020-08-10 | 2021-02-19 | 广州汇豪计算机科技开发有限公司 | RSU equipment and working method thereof |
| CN111834746A (en) * | 2020-09-17 | 2020-10-27 | 成都知融科技股份有限公司 | Dual-polarization radio frequency front-end system |
| CN111834746B (en) * | 2020-09-17 | 2020-12-04 | 成都知融科技股份有限公司 | Dual-polarization radio frequency front-end system |
| CN112864636A (en) * | 2020-12-31 | 2021-05-28 | 江苏肯立科技股份有限公司 | Ultra-wideband metal Vivaldi dual-polarized antenna |
| CN112993598A (en) * | 2021-02-23 | 2021-06-18 | 中国人民解放军国防科技大学 | Low-cost transparent phased array antenna for low-orbit spacecraft |
| CN113012435A (en) * | 2021-03-26 | 2021-06-22 | 深圳市壹云智能科技有限公司 | Traffic data acquisition method and device, computer equipment and storage medium |
| CN114818592A (en) * | 2022-04-27 | 2022-07-29 | 电子科技大学 | Sparse array optimization array arrangement method under layout constraint of back feed chip |
| CN114818592B (en) * | 2022-04-27 | 2023-04-07 | 电子科技大学 | Sparse array optimization array arrangement method under layout constraint of back feed chip |
| CN116938298A (en) * | 2023-07-21 | 2023-10-24 | 广东格林精密部件股份有限公司 | Active phased array and baseband complex digital signal processing algorithm thereof |
| CN116938298B (en) * | 2023-07-21 | 2024-04-30 | 广东格林精密部件股份有限公司 | Active phased array and baseband complex digital signal processing algorithm thereof |
| CN117613538A (en) * | 2023-12-04 | 2024-02-27 | 星元信息技术(深圳)有限公司 | Method and system for realizing uniform distribution of radiation field intensity of RFID array antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102509901B (en) | 2013-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102509901B (en) | Phased-array antenna applied to ETC (Electronic Toll Collection) system and application method thereof | |
| CN202855894U (en) | High isolation double unit MIMO array antenna | |
| CN102831657B (en) | ETC communication control method, multiple-beam antenna, RSU and ETC system | |
| CN103558594B (en) | Based on the phased array beam synthetic method of airborne equipment | |
| CN103618559B (en) | A kind of radio frequency front-end device based on directional antenna and communication control method thereof | |
| CN103441338B (en) | The phased active integrated antenna of a kind of remote controlled two dimensional surface | |
| CN102832452A (en) | High-isolation double-unit MIMO (multiple input multiple output) antenna array | |
| CN103476043B (en) | Wireless local area network access point capable of intelligent antenna scanning covering and access | |
| CN208873190U (en) | A kind of roadside unit of ETC system | |
| CN110441740B (en) | Distributed MIMO radar robust power distribution method based on layered game | |
| CN103354304A (en) | Coated antenna for microwave reader-writer of ETC (electronic toll collection) system | |
| CN111541046B (en) | Luneberg lens antenna and base station | |
| CN107026331A (en) | A kind of stepped Aperture distribution design method transmitted for microwave wireless energy | |
| CN208570944U (en) | A kind of micro-strip array antenna applied to automobile side rear detection radar | |
| CN112086745A (en) | ETC antenna fused with V2X equipment | |
| CN204271254U (en) | The accurate Yagi spark gap patch antenna array of L-band | |
| CN108054514A (en) | A kind of antenna system of two-dimensional radiation directional diagram reconstructable | |
| CN212848810U (en) | ETC antenna fused with V2X equipment | |
| Lahiry et al. | Performance analysis of unmanned aerial vehicle enabled wireless power transfer considering radio frequency system imperfections | |
| CN220456659U (en) | Dual-frenquency VICTS phased array antenna | |
| Tang et al. | Design of 5G dual-antenna passive repeater based on machine learning | |
| CN104156680A (en) | UHF RFID reader based on beam switching smart antenna | |
| CN104407626A (en) | Phased-array antenna control method, device and system and frequency spectrum detection equipment | |
| CN106532246B (en) | Combined antenna | |
| CN104466360A (en) | Coated antenna device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |