CN104409868B - UWB (ultra wide band) microstrip dipole antenna array and pulse UWB detection imaging device thereof - Google Patents
UWB (ultra wide band) microstrip dipole antenna array and pulse UWB detection imaging device thereof Download PDFInfo
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- CN104409868B CN104409868B CN201410710719.4A CN201410710719A CN104409868B CN 104409868 B CN104409868 B CN 104409868B CN 201410710719 A CN201410710719 A CN 201410710719A CN 104409868 B CN104409868 B CN 104409868B
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Abstract
The invention discloses a UWB (ultra wide band) microstrip dipole antenna array and a pulse UWB detection imaging device thereof. A plurality of microstrip antenna units are printed on the upper surface of a dielectric slab of the UWB microstrip dipole antenna array; the microstrip antenna units are distributed around an virtual origin in a central symmetry manner on the upper surface of the dielectric slab; center connecting lines of each three adjacent microstrip antenna units form a virtual isosceles triangle. The UWB microstrip dipole antenna array is connected with a front-end control circuit. The front-end control circuit is connected with the digital output end of a UWB receiver through a gaussian pulse source. The front-end control circuit is connected with the analog input end of the UWB receiver through a low-noise small signal amplifier. The control input end of the front-end control circuit is connected with the UWB receiver through a parallel port line. The UWB receiver is connected with an upper computer. The UWB microstrip dipole antenna array realizes simplicity and low cost, has the characteristics of high resolution ratio, simple and compact structure, convenience for carrying and expansion and the like and can rapidly acquire position information of a hidden target.
Description
Technical field
The invention belongs to pulse ultra-broad band Radar Technology field and in particular to a kind of super wide band microstrip antenna dipole array and
Its pulse ultra-broad band detecting and imaging device.
Background technology
Pulse ultra-broad band radar is a kind of time-domain imaging detection system based on subnanosecond level pulse, and it has good wearing
The features such as permeability, high-resolution, high power efficiency, high detection rate, target after non-metal barriers or in medium can be carried out non-
Intrusive mood detects, positions, follows the tracks of and state analysiss, obtains in fields such as anti-terrorism, rescue, biomedicine, lossless detections and extensively closes
Note.
Although some pulse ultra-broad band radars existing achieve ultra broadband Detection location to a certain extent, visit in system
Survey precision, still have much room for improvement in cost of implementation and complexity, trace it to its cause when being primarily due to pulse ultra-broad band radar antenna
Domain characteristic and corresponding detection method directly affects the performance of whole system, and under special environment portable equipment except requiring
Pulse ultra-broad band radar has high-resolution, also requires that overall system architecture is compact to be convenient for carrying and launch, so antenna chi
Very little can not be excessive.The antenna form that ULTRA-WIDEBAND RADAR is commonly used at present mainly has electromagnetic horn, Vivaldi antenna and dipole sky
Line, individual antenna size all ratios are larger, and aperture is relatively small, although system can achieve good range resolution ratio, due to sky
The restriction in string holes footpath, azimuth resolution is difficult to fully up to expectations.Using the method for synthetic aperture, by portable antenna acquisition time not
With the echo information in orientation although azimuth resolution can be improved, but cannot resultant motion target echo, and require sky
Line shift position precise control, whole process complexity is time-consuming, is particularly difficult in particular circumstances.By increasing transmitting-receiving sky
Line number amount extends the method in aperture although can improve azimuth resolution to a certain extent, is provided simultaneously with detecting moving target
Ability, but the direct result brought of antenna amount increase is system both bulk it is difficult to handheld application.
Content of the invention
The technical problem to be solved is the detection accuracy of existing pulse ultra-broad band detecting and imaging device, is implemented as
Basis and the deficiency of complexity, provide a kind of super wide band microstrip antenna dipole array and its pulse ultra-broad band detecting and imaging device.
For solving the above problems, the present invention is achieved by the following technical solutions：
Super wide band microstrip antenna dipole array, is mainly made up of dielectric-slab and metallic reflection plate.It is solid that dielectric-slab passes through bolt
Due to the surface of metallic reflection plate, and there is certain gap between the two.The upper surface of above-mentioned dielectric-slab is printed with multiple
Microband antenna unit, these microband antenna units are centrosymmetric distribution around a virtual origin in the upper surface of dielectric-slab,
The line of centres of every 3 adjacent microband antenna units constitutes a virtual isosceles triangle, and each virtual isosceles triangle
Size shape completely the same.Each microband antenna unit is in integrally petal, and that is, each microband antenna unit is by 4 centers
Symmetrical and separate antenna lens is constituted, and the antenna lens of wherein 2 level of relative settings forms horizontal-doublet antenna, separately
The antenna lens of outer 2 vertically opposite settings forms vertical dipole antenna.The inside side of each antenna lens is i.e. in symmetrical
Heart side is provided with distributing point, and is all connected to a coaxial line on each distributing point.4 coaxial lines on each microband antenna unit
Lower end both passes through dielectric-slab and extends between dielectric-slab and metallic reflection plate, and 2 that wherein connect horizontal-doublet antenna coaxial
The lower end of line is connected together and forms horizontal-doublet antenna balun, connects the lower end of 2 coaxial lines of vertical dipole antenna
Be connected together formation vertical dipole antenna balun.It is terminated with a horizontal dipole sky under horizontal-doublet antenna balun
Line feeder line, the lower end of this horizontal-doublet antenna feeder line is drawn downwards through metallic reflection plate.Vertical dipole antenna balun
Under be terminated with a vertical dipole antenna feeder line, the lower end of this vertical dipole antenna feeder line again pass through metallic reflection plate to
Lower extraction.
In such scheme, the distance between dielectric-slab and metallic reflection plate are λ/4, and wherein λ is center of antenna frequency wavelength.
In such scheme, constitute horizontal-doublet antenna balun 2 coaxial lines at the position of dielectric-slab λ/4 by 2
The outer conductor of root coaxial line welds together, and 2 coaxial lines constituting vertical dipole antenna balun are apart from dielectric-slab λ/4
The outer conductor of 2 coaxial lines is welded together by the place of putting, and wherein λ is center of antenna frequency wavelength.
In such scheme, the geometry that each antenna lens is all mixed using oval and bowtie-shaped, wherein antenna lens
Outwards side is ellipse, and the inside side of antenna lens is bowtie-shaped.
In such scheme, the number of the microband antenna unit of upper printing of dielectric-slab is 12, wherein around virtual origin
First lap be 4 antenna elements, around second enclosing as 8 antenna elements of virtual origin.
Pulse ultra-broad band detecting and imaging device based on above-mentioned super wide band microstrip antenna dipole array it is characterised in that：Main
Will be by super wide band microstrip antenna dipole array, front-end controlling circuit, Gaussian pulse source, low noise small signal amplifier, ultra broadband
Receiver and host computer composition.Super wide band microstrip antenna dipole array is connected with front-end controlling circuit.Front-end controlling circuit
Input termination Gaussian pulse source output terminal, the synchronous input end in Gaussian pulse source connects the digital output end of ultra wideband receiver.
The output termination low noise small signal amplifier of front-end controlling circuit, the outfan of low noise small signal amplifier connects ultra broadband
Receiver analog input end.The control signal of front-end controlling circuit connects ultra wideband receiver by simultaneously mouth line.Ultra-wideband receiver
Machine connects host computer.
In such scheme, super wide band microstrip antenna dipole array comprises 12 microband antenna units.Now, front-end control electricity
Road mainly receives selecting module by transmitting and Unit selection module forms.Transmitting receives selecting module and is thrown by 24 radio frequency hilted broadswords two
Switch is constituted.Unit selection module is grouped by 2 completely identical in structure transmitter unit selected sections and receiving unit selector
Become, each part is constituted by 1 radio frequency hilted broadsword six throw switch and 6 radio frequency hilted broadsword four throw switches.Transmitter unit selected section
1 splice grafting line end of radio frequency hilted broadsword six throw switch be connected with Gaussian pulse source, 6 tap line ends of radio frequency hilted broadsword six throw switch
Respectively it is connected with the splice grafting line end of 1 radio frequency hilted broadsword four throw switch.Totally 24 tap line ends of 6 radio frequency hilted broadsword four throw switches respectively connect
Sending and receiving are penetrated one of in the tap line end of 1 radio frequency hilted broadsword two throw switch receiving in selecting module.Receiving unit selects
1 splice grafting line end of partial radio frequency hilted broadsword six throw switch is connected with low noise small signal amplifier, radio frequency hilted broadsword six throw switch
6 tap line ends be respectively connected with the splice grafting line end of 1 radio frequency hilted broadsword four throw switch.Totally the 24 of 6 radio frequency hilted broadsword four throw switches
Individual tap line end respectively connects another in the tap line end of 1 radio frequency hilted broadsword two throw switch in transmitting reception selecting module.
24 radio frequency hilted broadsword two throw switches that transmitting receives in selecting module are divided into 2 groups, and totally 12 splice grafting line ends connect 12 to one of which
The horizontal-doublet antenna feeder line of individual microband antenna unit, another group totally 12 splice grafting line ends connect 12 microband antenna units
Vertical dipole antenna feeder line.
Compared with prior art, the present invention realizes simple low cost, and has high resolution, simple and compact for structure, square
The features such as Portable belt launches, can quickly obtain vanishing target positional information.
Brief description
Fig. 1 is a kind of structured flowchart of the pulse ultra-broad band detecting and imaging device based on micro-strip dipole antenna battle array.
Fig. 2 is the perspective view of super wide band microstrip antenna dipole array.
Fig. 3 is the side view of Fig. 2.
Fig. 4 is distribution schematic diagram on dielectric-slab for the microband antenna unit.
Fig. 5 is the structural representation of microband antenna unit.
Fig. 6 is the geometry schematic diagram of the single dipole antenna of microband antenna unit.
Fig. 7 is the principle schematic of front-end controlling circuit.
Fig. 8 is the equivalent sampling schematic diagram of ultra wideband receiver.
Fig. 9 is the data recombination schematic diagram of ultra wideband receiver.
Figure 10 is a kind of pulse ultra-broad band detection imaging method flow chart based on micro-strip dipole antenna battle array.
Figure 11 is a kind of pulse ultra-broad band detecting and imaging device XFDTD experiment scene based on micro-strip dipole antenna battle array
Figure.
Figure 12 is a kind of target imaging figure of the pulse ultra-broad band detecting and imaging device based on micro-strip dipole antenna battle array.
Specific embodiment
Based on the pulse ultra-broad band detecting and imaging device of micro-strip dipole antenna battle array, as shown in figure 1, mainly micro- by ultra broadband
Band antenna dipole array, front-end controlling circuit, Gaussian pulse source, low noise small signal amplifier, ultra wideband receiver and upper
Machine forms.Super wide band microstrip antenna dipole array is connected with front-end controlling circuit by feeder line.The input of front-end controlling circuit
Connect Gaussian pulse source, the synchronous input end in Gaussian pulse source connects the digital output end of ultra wideband receiver.Front-end controlling circuit
Output termination low noise small signal amplifier, it is defeated that the outfan of low noise small signal amplifier connects ultra wideband receiver simulation
Enter end.The control signal of front-end controlling circuit connects ultra wideband receiver by simultaneously mouth line.Ultra wideband receiver passes through ultra broadband
The USB2.0 interface of receiver connects host computer.
Above-mentioned super wide band microstrip antenna dipole array is the main improvement of the present invention, as shown in Figures 2 and 3, mainly by being situated between
Scutum and metallic reflection plate are constituted.Dielectric-slab is secured by bolts in the surface of metallic reflection plate, and has one between the two
Fixed gap.The upper surface of above-mentioned dielectric-slab is printed with multiple microband antenna units, and these microband antenna units are in dielectric-slab
Upper surface is centrosymmetric distribution around a virtual origin, the line of centres composition one of every 3 adjacent microband antenna units
Individual virtual isosceles triangle, and the size shape of each virtual isosceles triangle is completely the same.Each microband antenna unit is overall
In petal, that is, by 4 centrosymmetry and separate antenna lens is constituted each microband antenna unit, wherein 2 water
The flat antenna lens being oppositely arranged forms horizontal-doublet antenna, and the antenna lens of in addition 2 vertically opposite settings forms vertical electric dipole
Sub-antenna.The inside side of each antenna lens is provided with distributing point near symmetrical centre side, and is all connected on each distributing point
One coaxial line.The lower end of 4 coaxial lines on each microband antenna unit both passes through that dielectric-slab extends to dielectric-slab and metal is anti-
Penetrate between plate, the lower end wherein connecting 2 coaxial lines of horizontal-doublet antenna is connected together formation horizontal-doublet antenna
Balun, the lower end of 2 coaxial lines of connection vertical dipole antenna is connected together and forms vertical dipole antenna balun.Level
It is terminated with a horizontal-doublet antenna feeder line, the lower end of this horizontal-doublet antenna feeder line passes through under dipole antenna balun
Metallic reflection plate is drawn downwards.It is terminated with a vertical dipole antenna feeder line, this is vertical under vertical dipole antenna balun
The lower end of dipole antenna feeder line again passes through metallic reflection plate and draws downwards.
Super wide band microstrip antenna dipole array designs in addition to will considering its bandwidth, gain, polarization and volume, also will try one's best
Reduce the coupling between microband antenna unit.The method generally reducing coupling is to increase unit interval from but this can increase antenna
Battle array volume, and can lead to antenna array that grating lobe problem occurs.Additionally, in wide frequency antenna battle array, graing lobe will be serious asking
Topic, because many lobes can be simultaneously received the data from different directions, produces interference.In order to suppress graing lobe, the present invention
Antenna array design employ the centrical concept of virtualphase, virtual phase center is not actual microband antenna unit physics phase
Position center, simply designs antenna phase center out virtual in actual two microband antenna unit geometric center positions, so
Between microband antenna unit, distance is more half as large in acceptable coupling range, the increasing of graing lobe peak frequency and is twice.Consider
To antenna array volume and detection accuracy, designed by the present invention, the microband antenna unit quantity of ultra broadband dipole microstrip antenna array is
12, bilinearity planned allocation, microband antenna unit relative position adopts triangle lattice structure, wherein around the of virtual origin
One encloses as 4 antenna elements, encloses as 8 antenna elements around the second of virtual origin, to effectively reduce antenna array area.At this
In embodiment, 2 base angles of the line of centres one virtual isosceles triangle of composition of every 3 adjacent microband antenna units are
37 °, a length of 125mm of waist, bottom side length 200mm, high long 75mm.Referring to Fig. 4.In the present embodiment, ultra broadband dipole micro-strip sky
Linear array includes dielectric-slab, 12 petal microband antenna units, metallic reflection plates are aluminium sheet, 24 baluns and feeder.
Wherein said dielectric-slab adopts RO4003 material, and thickness is 1.6mm, and size is 540mm × 450mm, and corner location passes through plastics
It is bolted in metallic reflection plate.The microband antenna unit of described 12 petal shapes, each microband antenna unit respectively by
Horizontal-doublet antenna and vertical dipole antenna composition, are printed on medium plate surface by printing circuit board technology.Single sky
The geometry that line lobe is mixed using oval and triangle (bowtie-shaped), referring to Fig. 6, it is easy to accomplish microband antenna unit is formed
Dual linear polarization configures.Described metallic reflection plate thickness is 3mm, and size is 600mm × 500mm, is fixed on by plastic bolt
Medium back, distance is center of antenna frequency wavelength a quarter between the two, thus avoiding the linear array backward radiation day after tomorrow to produce
Raw interference.By one is long and the other is short, two coaxial lines form described balun, and coaxial line one end is passed through to micro-strip sky from medium back
Line unit feed position, the outer conductor of long coaxial line be welded on one of dipole raise one's arm on, and by this coaxial line
The outer conductor of conductor and short coaxial line be welded on dipole antenna another raise one's arm on, simultaneously apart from dielectric-slab a quarter
At wavelength location, the outer conductor of two coaxial lines is welded together.Described feeder is that the long coaxial line of composition balun is remaining
Remaining part is divided it is desirable to the equal length of 24 feeders, and its other end is passed through by the aperture in metallic reflection plate, transferred with SMA
Head connects to antenna array front-end controlling circuit, referring to Fig. 5.
Super wide band microstrip antenna dipole array will realize a virtual phase center, and in actual use, any time is only
To a dipole excitation in antenna array, and echo can be received with another with its like-polarized adjacent dipole, thus forming
One transmitting/reception dual station.Thus in such a mode, the transmitting pulse of each dipole antenna and reception echo are separate
, that is, each dipole antenna is individually controlled.The dipole composition transmitting selecting all two adjacent equipolarizations successively connects
Receive dual station it is possible to realize all of virtual phase center.So being accomplished by antenna array front end between antenna array and receiver
Control module carrys out co-ordination.As shown in fig. 7, front-end controlling circuit receives selecting module group by Unit selection module and transmitting
Become, module adopts radio-frequency switch array to realize, and has two-way admittance function.Described Unit selection module is integrated in 2 pieces of FR4 respectively
On dielectric-slab A and B.Dielectric-slab A mainly connects 6 by 1 radio frequency hilted broadsword six throw switch (SP6T, HMC252QS24) with microstrip line
Radio frequency hilted broadsword four throw switch (SP4T, HMC241QS16) is constituted, that is, have 1 tunnel simulation input (output) 24 tunnel simulation output (defeated
Enter)；Its simulation input connects Gaussian pulse source, for antenna array transmitter unit select, pulse signal through dielectric-slab A transmit to send out
Penetrate unit dipole.Dielectric-slab B is identical with the structure of dielectric-slab A, and its simulation output connects low noise small signal amplifier, for sky
Linear array receiving unit selects, and echo-signal is transmitted to LNA through dielectric-slab B.Described transmitting receives selecting module, collects respectively
Become on 3 pieces of FR4 dielectric-slab C, D and E.Three pieces of dielectric-slabs C, D are identical with the structure of E, and every piece of dielectric-slab C, D and E are mainly by 8
Radio frequency hilted broadsword two throw switch (SP2T, HMC245QS16) and microstrip line are constituted, that is, have 8 Ge Zi roads, there is 1 output (input) on every road
2, end input (output) end.The feeder of the microband antenna unit of its output termination super wide band microstrip antenna dipole array, two
Individual input connects dielectric-slab A and dielectric-slab B with coaxial line respectively, for launching pulse or receiving echo.Unit selection module
Receive selecting module control input termination receiver with transmitting, by system master circuit output channel selecting control word, control sky
The transmitting pulse of linear array unit and reception echo.
Taking the configuration of super wide band microstrip antenna dipole array vertical polarization as a example, mainly include the following steps that：
Step 1：System master circuit selects No. 6 unit vertical dipoles as transmitting antenna, then select 1 successively, 3,
4th, as reception antenna, ultra wideband receiver gathers storage each passage echo letter to 7,8,9, No. 11 unit vertical dipoles respectively
Number.
Step 2：System master circuit selects No. 7 unit vertical dipoles as transmitting antenna, then select 2 successively, 4,
5th, as reception antenna, ultra wideband receiver gathers each passage echo-signal of storage to 8,10, No. 12 unit vertical dipoles respectively.
Step 3：System master circuit selects No. 11 unit vertical dipoles as transmitting antenna, then select 8 successively, 9,
As reception antenna, ultra wideband receiver gathers each passage echo-signal of storage to No. 12 unit vertical dipoles respectively.
Step 4：System master circuit selects No. 2 unit vertical dipoles as transmitting antenna, then selects 1,4,5 successively
, as reception antenna, ultra wideband receiver gathers each passage echo-signal of storage respectively for number unit vertical dipole.
Step 5：System master circuit selects No. 3 unit vertical dipoles as transmitting antenna, then selects 1, No. 8 successively
As reception antenna, ultra wideband receiver gathers each passage echo-signal of storage to unit vertical dipole respectively.
Step 6：System master circuit selects No. 10 unit vertical dipoles as transmitting antenna, then selects 5,12 successively
, as reception antenna, ultra wideband receiver gathers each passage echo-signal of storage respectively for number unit vertical dipole.
Step 7：System master circuit selects No. 1 unit vertical dipole as transmitting antenna, selects No. 2 units vertically even
As reception antenna, ultra wideband receiver collection stores this passage echo-signal to extremely son.
Step 8：System master circuit selects No. 11 unit vertical dipoles as transmitting antenna, selects No. 12 units vertical
Dipole, stores this passage echo-signal as reception antenna, ultra wideband receiver collection.
Ultra wideband receiver achieves the transmission of echo-signal equivalent sampling data, and it is mainly by analog-digital converter, clock
Produce circuit, stepping delay circuit, Double Port Random Memory, sampling restructuring circuit, USB data transmission control circuit, USB2.0
Interface and system master circuit are constituted.Its analog-digital converter adopts ADI company buffer-type modulus conversion chip AD9467, adopts for 16
Sample precision, highest sample rate 250MSPS, running parameter can be configured by SPI interface；Its analog front circuit adopt broadband (4.5～
3000MHz) balun (TC1-1-13M) coupling, improves gain flatness in echo-signal frequency band range, keeps modulus to turn simultaneously
Parallel operation high s/n ratio and dynamic range, complete front end signal conditioning.Clock generation circuit adopts the LMK03002 of TI company, passes through
It is 1～862MHz LVPECL clock that SPI interface configures exportable frequency range, and shake is less than 400fs.Stepping delay circuit is adopted
With the SY89295 of MICREL company, programmable generation 10ps precision, maximum 10ns time delay.Double Port Random Memory, sampling restructuring
Circuit, USB data transmission control circuit and system master circuit adopt the EP2C20F484C6N of ALTERA company to realize.
USB2.0 interface uses the CY7C68013 of Cypress company, the maximum data transfer rate 480Mbps.System master circuit
It is the core of system work, first passes through the control word of USB2.0 interface host computer, configuration starts clock and produces electricity
Road produces synchronised clock and sampling clock.Synchronised clock trigger pulse source produces Gaussian pulse train and sends into front-end controlling circuit,
As transmission signal；Sampling clock connects stepping delay circuit, when output stepping delay clock is as analog-digital converter equivalent sampling
Clock.Then governor circuit configuration antenna front ends control circuit, selects same polarization adjacent antenna array element dipole composition to launch/connect
Receive dual station, equivalent sampling starts.Equivalent sampling principle, as shown in figure 8, the echo-signal cycle is T0, analog-digital converter sampling week
Phase is Ts, far below echo-signal Nyquist sampling frequency；Each pulse repeats start time, and governor circuit programs
SY89295 obtains N point, repeats to adopt to sampling clock accurate delay Δ t, then each pulse repetition period analog-digital converter sampling
Sample obtains N × M point after the M cycle.Analog-digital converter data output connects a data input pin of Double Port Random Memory, ripple simultaneously
Shape restructuring circuit provides write address for this data terminal；Another data terminal of Double Port Random Memory and address termination USB data transmission
Control circuit.Data recombination principle, as shown in figure 9, Double Port Random Memory storage depth is N × M, is equally divided into N section；Modulus
ADC data output is synchronous with waveform restructuring circuit address output, the N that first echo periodic sampling of analog-digital converter obtains
Point sampling data is individually placed to the original position of each section of Double Port Random Memory；Then the N point sampling in second echo cycle
Data is individually placed to second position of each section of Double Port Random Memory, completes the restructuring of N × M point sampling by that analogy.Complete
After one frame data sampling restructuring, USB data transmission control circuit reads Double Port Random Memory data, is sent by USB2.0 interface
Enter host computer to process, complete a target acquisition.
Above-mentioned carrierfree pulse ultra-broad band radar installations is to vanishing target detection imaging idiographic flow, as shown in Figure 10, mesh
Mark detects and is completed by following steps：
A1：Receive control word.Start working after electricity on ultra wideband receiver, system master circuit first passes through USB2.0 and connects
Mouth receives and stores the operating parameter control word of host computer transmission.
A2：Configuration device running parameter.System master circuit configurable clock generator produces circuit and analog-digital converter running parameter,
Set sampling period Ts, impulsive synchronization cycle T 0 and stepping delay circuit delay stepsize Δ t.Each echo cycle of analog-digital converter
Sampling number N, equivalent sampling periodicity M and Ts, T0, the relation of Δ t are：
Wherein
By configuring Δ t, thus it is possible to vary its equivalent sampling rate, the more little then equivalent sampling rate of Δ t is higher；By configuring
Ts, determines to complete echo periodicity needed for equivalent sampling, the Ts more little then required cycle is fewer, system work is faster.T0 determines
This device target acquisition maximum unambiguous distance, that is, do not produce obscure in the case of may detect farthest target range, note
For
Wherein c is the light velocity, εrFor relative dielectric constant.Echo-signal can only receive within this impulse ejection cycle, such as
Fruit is extended to the impulse ejection cycle next time, will produce and obscure.
A3：Select antenna array polarization mode.Antenna array can be configured to two kinds of polarization working methods, level pole by front-end circuit
Change and vertical polarization, thus this device can carry out detection imaging under two kinds of polarization modes to target.
A4, A5, A6：Echo-signal equivalent sampling.System master circuit output channel selecting control word is to antenna array front end
Control circuit, selects two adjacent same polarization antenna element dipoles to form a transmitting/reception dual station, this passage echo is believed
Number equivalent sampling receives.Then governor circuit switching channel, proceeds echo-signal equivalent sampling, until completing this polarization side
Antenna array all passages echo signal reception under formula.
A7：Send data.After device completes all passage echo signal sample receptions under all polarization modes of antenna array, lead to
Cross USB2.0 interface and send data to host computer process.
B1：Host computer output device operating parameter control word.
B2：Host computer receives the sampled data that ultra wideband receiver sends.
B3：Host computer carries out data processing and shows.Host computer Background scheduling MATLAB program, is carried out to target echo signal
Corresponding denoising, compensation and imaging processing.
Figure 11 and 12 is respectively a kind of pulse ultra-broad band detecting and imaging device XFDTD real field scape and the emulation that the present invention provides
Figure, three target's centers are located at X-Y plane (- 0.6,1.4), (0,1.6), (0.6,1.8) place respectively, and antenna array is located at X-Z and puts down
Face, its aperture center is located at zero.Using single order Gaussian-pulsed planewave as driving source, the target that antenna array is received
Backscatter signal utilizes CF_BP algorithm imaging processing, target imaging result as shown in the figure it is seen that based on above-mentioned detection method and
Device can quickly obtain target accurate distance and bearing information.
Claims (7)
1. super wide band microstrip antenna dipole array it is characterised in that：Mainly it is made up of dielectric-slab and metallic reflection plate；Dielectric-slab leads to
Cross the surface that bolt is fixed on metallic reflection plate, and there is certain gap between the two；The upper surface print of above-mentioned dielectric-slab
It is formed with multiple microband antenna units, these microband antenna units are in center pair in the upper surface of dielectric-slab around a virtual origin
Claim distribution, the line of centres of every 3 adjacent microband antenna units constitutes a virtual isosceles triangle, and each virtual isosceles
The size shape of triangle is completely the same；
Each microband antenna unit is in integrally petal, and that is, each microband antenna unit is by 4 centrosymmetry and separate
Antenna lens constituted, the antenna lens of wherein 2 level of relative setting forms horizontal-doublet antenna, in addition 2 vertically opposite
The antenna lens of setting forms vertical dipole antenna；The inside side of each antenna lens is provided with feed near symmetrical centre side
One coaxial line is all connected on point, and each distributing point；The lower end of 4 coaxial lines on each microband antenna unit both passes through medium
Plate extends between dielectric-slab and metallic reflection plate, and the lower end phase wherein connecting 2 coaxial lines of horizontal-doublet antenna is connected in
Form horizontal-doublet antenna balun together, the lower end of 2 coaxial lines of connection vertical dipole antenna is connected together and is formed
Vertical dipole antenna balun；It is terminated with a horizontal-doublet antenna feeder line, this level under horizontal-doublet antenna balun
The lower end of dipole antenna feeder line is drawn downwards through metallic reflection plate；It is terminated with one under vertical dipole antenna balun to hang down
Straight dipole sub-antenna feeder line, the lower end of this vertical dipole antenna feeder line again passes through metallic reflection plate and draws downwards.
2. super wide band microstrip antenna dipole array according to claim 1 it is characterised in that：Dielectric-slab and metallic reflection plate
The distance between be λ/4, wherein λ be center of antenna frequency wavelength.
3. super wide band microstrip antenna dipole array according to claim 1 it is characterised in that：Constitute horizontal-doublet antenna
The outer conductor of 2 coaxial lines is being welded together at the position of dielectric-slab λ/4 by 2 coaxial lines of balun, constitutes vertically even
2 coaxial lines of pole sub-antenna balun the outer conductor of 2 coaxial lines being welded together at the position of dielectric-slab λ/4, its
Middle λ is center of antenna frequency wavelength.
4. super wide band microstrip antenna dipole array according to claim 1 it is characterised in that：Each antenna lens is all using ellipse
The geometry that circular and bowtie-shaped mixes, the wherein outside side of antenna lens are ellipse, and the inside side of antenna lens is neck
Knot shape.
5. super wide band microstrip antenna dipole array according to claim 1 it is characterised in that：The micro-strip printed on dielectric-slab
The number of antenna element is 12, and wherein the first lap around virtual origin is 4 antenna elements, around the second of virtual origin
Enclose as 8 antenna elements.
6. pulse ultra-broad band detecting and imaging device, including super wide band microstrip dipole sky described in any one in Claims 1 to 5
Linear array it is characterised in that：Main little by super wide band microstrip antenna dipole array, front-end controlling circuit, Gaussian pulse source, low noise
Signal amplifier, ultra wideband receiver and host computer composition；Super wide band microstrip antenna dipole array is connected with front-end controlling circuit
Connect；The input termination Gaussian pulse source output terminal of front-end controlling circuit, the synchronous input end in Gaussian pulse source connects ultra broadband and connects
The digital output end of receipts machine；The output termination low noise small signal amplifier of front-end controlling circuit, low noise small signal amplifier
Outfan connect ultra wideband receiver analog input end；The control signal of front-end controlling circuit connects ultra broadband by simultaneously mouth line
Receiver；Ultra wideband receiver connects host computer.
7. pulse ultra-broad band detecting and imaging device according to claim 6 it is characterised in that：Super wide band microstrip dipole sky
Linear array comprises 12 microband antenna units；Now, front-end controlling circuit mainly receives selecting module and Unit selection mould by transmitting
Block forms；Transmitting receives selecting module and is made up of 24 radio frequency hilted broadsword two throw switches；Unit selection module is by the complete phase of 2 structures
Same transmitter unit selected section and receiving unit selected section composition, each part is by 1 radio frequency hilted broadsword six throw switch and 6
Individual radio frequency hilted broadsword four throw switch is constituted；
1 splice grafting line end of radio frequency hilted broadsword six throw switch of transmitter unit selected section is connected with Gaussian pulse source, radio frequency hilted broadsword
6 tap line ends of six throw switches are respectively connected with the splice grafting line end of 1 radio frequency hilted broadsword four throw switch；6 radio frequency hilted broadsword four-throws are opened
The totally 24 tap line ends closing respectively connect in the tap line end that transmitting receives 1 radio frequency hilted broadsword two throw switch in selecting module
One of；
1 splice grafting line end of radio frequency hilted broadsword six throw switch of receiving unit selected section is connected with low noise small signal amplifier,
6 tap line ends of radio frequency hilted broadsword six throw switch are respectively connected with the splice grafting line end of 1 radio frequency hilted broadsword four throw switch；6 radio frequency lists
Totally 24 tap line ends of knife four throw switch respectively connect the tap that transmitting receives 1 radio frequency hilted broadsword two throw switch in selecting module
Another in line end；
24 radio frequency hilted broadsword two throw switches that transmitting receives in selecting module are divided into 2 groups, and totally 12 splice grafting line ends connect one of which
Connect the horizontal-doublet antenna feeder line of 12 microband antenna units, another group totally 12 splice grafting line ends connect 12 microstrip antenna lists
The vertical dipole antenna feeder line of unit.
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| CN104701615A (en) * | 2015-03-24 | 2015-06-10 | 邝嘉豪 | High gain antenna |
| US10386478B2 (en) * | 2016-05-18 | 2019-08-20 | International Business Machines Corporation | Range-independent resolution radar |
| CN106129638B (en) * | 2016-07-21 | 2019-06-11 | 华为技术有限公司 | Antenna and base station |
| CN108767454A (en) * | 2018-04-27 | 2018-11-06 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Ultra wide band is total to radiating aperture antenna element |
| CN112955774A (en) * | 2019-12-31 | 2021-06-11 | 深圳市大疆创新科技有限公司 | Antenna assembly of microwave radar, microwave radar and movable platform |
| CN111952719A (en) * | 2020-08-11 | 2020-11-17 | 中国人民解放军海军航空大学青岛校区 | Orthogonal polarization dipole antenna array of airborne phased array radar |
| CN114520670B (en) * | 2020-11-18 | 2024-04-30 | Oppo广东移动通信有限公司 | Ultra-wideband communication system and electronic equipment |
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| CN101047277A (en) * | 2006-03-27 | 2007-10-03 | 佛山市健博通电讯实业有限公司 | Plane collinear double-polarization plate antenna |
| CN103682606A (en) * | 2013-09-23 | 2014-03-26 | 中国科学院电子学研究所 | An ultra wide band quaternary array antenna apparatus used for a through-wall imaging radar |
| CN204289722U (en) * | 2014-11-28 | 2015-04-22 | 桂林电子科技大学 | Super wide band microstrip antenna dipole array and pulse ultra-broad band detecting and imaging device thereof |
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| CN101047277A (en) * | 2006-03-27 | 2007-10-03 | 佛山市健博通电讯实业有限公司 | Plane collinear double-polarization plate antenna |
| CN103682606A (en) * | 2013-09-23 | 2014-03-26 | 中国科学院电子学研究所 | An ultra wide band quaternary array antenna apparatus used for a through-wall imaging radar |
| CN204289722U (en) * | 2014-11-28 | 2015-04-22 | 桂林电子科技大学 | Super wide band microstrip antenna dipole array and pulse ultra-broad band detecting and imaging device thereof |
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