CN104966887B - The high-acruracy survey type antenna and communication equipment of a kind of high anti-multipath - Google Patents
The high-acruracy survey type antenna and communication equipment of a kind of high anti-multipath Download PDFInfo
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Abstract
The present invention relates to a kind of high-acruracy survey type antenna of high anti-multipath and communication equipment, the antenna includes central radiating element component, support component, ground connection board component, half opening cylindrical cavity component, polarization isolation work(separating device and wave transparent encapsulated antenna cover；Central radiating element component is fixed on the top of support component, support component is fixed on ground connection board component center, half opening cylindrical cavity component is co-axially mounted against earth plate module backside, polarization isolation work(separating device is installed on the back side center of the ground connection board component, central radiating element component is connected through the coaxial feeder built in support component with polarization isolation work(separating device, and antenna is entirely sealed in wave transparent encapsulated antenna cover.The present invention has multifrequency, broadband and stable radiating phase central characteristics, the single lobe directions figure of the total space, high circular symmetry, height roll-offs, high front and rear ratio, good wide-angle circular polarization characteristics, has the speciality such as superpower anti-multipath performance, small-sized, light weight, highly reliable, inexpensive.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of high accuracy of high anti-multipath in satellite navigation terminal is surveyed
Amount type reception antenna and communication equipment.
Background technology
Aeronautical satellite transmission signal includes carrier wave, ranging code and numeric data code, frequently referred to navigation message.Receiver will navigate electric
Text carries out the 7 dimension information that information processing is converted to Position, Velocity and Time, completes navigation, positions and provide time reference.It is high-precision
Spend in GNSS application, positioning measurement precision is brought up to centimetre and sub- centimetres, and its antenna is that the receiver is indispensable
Key equipment, very crucial effect is played to the carrier phase measurement precision for improving GNSS.
In GPS early stages, the GPS-L1 receiver antennas of single-frequency pseudorange code positioning use microband paste and four arm spiral days more
Line.With double-frequency GPS differential applications, there is double-deck micro-strip paster antenna, the stacking solution that this kind of antenna passes through micro-strip dielectric-slab
Determine GPS-L1 and GPS-L2 dual-frequency point applications, but multiple frequency broad band application requirement can not be fully met.There is microstrip antenna radiation again
Surface wave can be produced simultaneously, because the excitation and radiation of surface wave make front and rear ratio, the circular symmetry of microstrip antenna antenna pattern
All it is difficult to improve with wide-angle circular polarization characteristics to improve.The ability of this kind of antenna anti-multipath is poor, it is difficult to meet that High-precision carrier is surveyed
Amount requires.Afterwards, to suppress the Circular microstrip patch antenna that surface wave proposes double short-circuit annulus, obtained in GPS-L1, L2
Obvious effect.The design is applied to multifrequency, broadband is still had any problem without departing from resonance concept.The satellite-based of current diversification
Resource, in face of more stars and deposit, for the application of the application environment that shares and high-acruracy survey requirement, microstrip antenna seems more to be had not
Foot.
Multipath refers to that a navigation satellite signal reaches the phenomenon of receiver by multiple paths.Reaching receiver signal can
With as being a direct signal and a plurality of superposition through indirect signals such as reflection, diffraction.Multipath signal directly contributes receiver
Pseudo-range measurements or carrier-phase measurement deviation, positioning precision and position stability is caused to decline.Multipath error is that GNSS connects
One of main error source of receipts machine positioning.Multi-path jamming has turned into further improves receiver positioning precision, stability and reliable
The problem that property must break through.The processing of GNSS receiver multipath signal is roughly divided into spatially and temporally two class.Receiver Time Domain Processing
Mainly suppress the influence of multipath signal, conventional has narrow correlation method, waveform decomposition method, iteratively faster maximum likelihood algorithm
(FIMLA), multipath estimation delay phase-locked loop method etc., this needs to occupy more resources, makes receiver device complex redundancy.This has
The miniaturization in receiver, lightweight, the target for lowering power consumption, reducing cost are carried on the back, and is caused for antenna peripheral reflection etc.
Time delay be less than the situations of 1/15 chip lengths, receiver still can not be handled effectively.In order to improve receiver system anti-multipath
Ability, for the application at present of receiver single antenna it is most be then plus chokes ring (Choke-Ring) form:Utilize choke coil
High-impedance behavior is presented to suppress surface wave in surface impedance.The introducing of choke coil considerably increases the size of element antenna, weight,
The increase of cost is also inevitable.And the design of chokes ring is that high impedance is presented based on collar extension to suppress stray radiation.It is this
Mechanism of action is relevant with frequency, further to expand frequency band, or further improves its realization of rejection ability and have any problem
's.
The content of the invention
The technical problems to be solved by the invention are in view of the shortcomings of the prior art, to pass through the Pattern Synthesis of space filtering
Suppress multipath with the half opening cylindrical cavity with slot of reshaping, there is provided a kind of small, light, the inexpensive high anti-multipath of body it is high-precision
Spend measurement type antenna and communication equipment.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of high-acruracy survey type antenna of high anti-multipath,
Including central radiating element component, support component, ground connection board component, half opening cylindrical cavity component, polarization isolation work(separating device and thoroughly
Bomi seals antenna house；
The central radiating element component is fixed on the top of support component, and the support component is fixed on ground connection board component
Center, the half opening cylindrical cavity component are co-axially mounted against earth plate module backside, and the polarization isolation work(separating device is installed on
The back side center of the ground connection board component, the central radiating element component is through the coaxial inner conductor built in support component and pole
Change the separating device connection of isolation work(, antenna is entirely sealed in wave transparent encapsulated antenna cover.
The beneficial effects of the invention are as follows：The present invention has complete centrosymmetric structure, in central radiating element component, ground connection
Multifrequency, broadband and stable radiating phase central characteristics are realized under board component and half opening cylindrical cavity collective effect with slot, are passed through
The space filtering of directional diagram figuration is realized in the presence of ground connection board component and half opening cylindrical cavity with slot, no back lobe can be formed
Heart is similar to directional diagram, effectively improves multipaths restraint efficiency, is realized by four support bars feed and polarization isolation work(separating device
4 circular polarisation feeds, isolate cross polar component, and the antenna also has the characteristic such as small-sized, light weight, highly reliable, inexpensive.
Antenna of the present invention and high-acruracy survey type compatible receiver adapted can realize determining for the real-time dynamic monitoring of cm or mm magnitudes
Position precision, is one of important core equipment of high-end receiver and CORS base stations.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, circle symmetrical structure centered on the central radiating element component, including four obtuse-angulate covering of the fans of bending
Oscillator, four covering of the fan oscillator pairwise orthogonals, form right-angled intersection radiating element.
It is using the above-mentioned further beneficial effect of scheme：Inventive antenna central radiating element is by 4 orthogonal broadbands
Covering of the fan oscillator forms, and belongs to short, short antenna, complete centrosymmetric structure, has the stable radiation phase heart, utilize two support bars
The auxiliary terminal short circuit coaxial line of formation is mended plus end capacitance compensation by exclusive widening frequency band design and condensance
Technology is repaid, not only realizes 0 °/180 ° of feed balun, and realizes the Broadband Matching of antenna feed.In 1.1-1.7MHz bands
It is interior, port standing-wave ratio VSWR≤1.2, fully meet the shared multifrequency of more stars, multimode application requirement.
Further, the support component includes four support bars, two-by-two support bar Orthogonally arrangement, the central radiating element
Each fan-shaped vibrator of component is respectively arranged in four support bar tops, and four covering of the fan oscillators keep phase with ground connection board component
With height.
Further, two adjacent support bars in four support bars of the support component are built-in with the coaxial of matching section
Cored wire, one end of the coaxial inner conductor are connected to on side support bar cored wire, the input of the other end and polarization isolation work(separating device
End is connected；Two other support bar forms the auxiliary allotment coaxial line of bottom short circuit, the auxiliary allotment of the bottom short circuit simultaneously
The distribution capacity that coaxial line is formed by top makes to keep microwave to be connected with covering of the fan oscillator side support bar coaxial inner conductor, is formed
0 °/180 ° of balanced feeding balun, and with forming impedance allotting network to coaxial line of the side support bar containing matching section.
It is using the above-mentioned further beneficial effect of scheme：Two support bars also serve as RF feeding coaxial lines in support component,
The built-in matching section that two other support bar is formed in auxiliary the allotment coaxial line, with feeding coaxial lines of bottom short circuit is made jointly
With without the then achievable matching to 50 Ω coaxial lines of additional network；The feeding network of the present invention is by coaxial 0 °/180 ° of feed
' Balun ' and 3dB/90 ° of polarization isolation work(separating device are formed, and are formed exclusive circular polarisation feeder equipment, are not only realized to radiation
Center cell forms 4 circular polarisation feeds, moreover it is possible to isolates cross polarization (LHCP) component, its main component is reflection multipath letter
Number.The feeder equipment is exclusive to be characterized in compact-sized, and integrated level is high, and feed RF losses are low, and easily with antenna and receiver
It is integrated.
Further, dielectric ring one circle for being used as director of coaxial installation is passed through at the top of the central radiating element component
Metallic plate.
Using the beneficial effect of above-mentioned further scheme：Metal plate as director is to directional diagram figuration and impedance
With working.
Further, the ground connection board component is that circular metal of the upper surface with multiple symmetrical Radial Coupling plates is put down
Plate, Radial Coupling plate, which is formed, two-by-two ends planar waveguide, prevents surface wave transmission.
It is using the above-mentioned further beneficial effect of scheme：The ground connection board component completes the space filter of directional diagram figuration
Ripple, vital effect is served to improving multipaths restraint efficiency, the waveguide formed on the earth plate is for along earth plate
The TE moulds (surface wave) of radial transport are in cutoff modes state, and multiple radial direction flat boards make surface wave (TE moulds) quilt in transmitting procedure
Decay, prevents stray radiation to disturb, inventive antenna anti-multipath mechanism and chokes ring are different, without increasing antenna aperture chi
Very little, its efficiency and frequency band are better than chokes loop antenna, and this antenna structure is lighter and handier, more compact, more inexpensive, also have more excellent resist
Multipath efficiency, broader frequency bandwidth characteristicses.
Further, the half opening cylindrical cavity component for multiple coaxial 90 ° of bendings of laminated belt half opening annulus, with ground connection
During board component combination installation, the half opening cylindrical cavity of centre short circuit is formed, cylindrical cavity opening upwards, high impedance is formed, with ground connection
The sequential effect of board component prevents stray electrical current and its radiation.
Further, in the cavity wall of the half opening cylindrical cavity, equidistant one group of radial direction slot is formed from openend, is prevented residual
Remaining stray electrical current forms circular current in cavity wall, and the quantity and size of the cylindrical cavity radius and chamber depth and its slot are adjusted as needed
It is whole, it is straight to cause stray electrical current radiation to be suppressed completely.
It is using the above-mentioned further beneficial effect of scheme：The half opening annulus with slot is with being grounded board component group
When closing installation, centre forms short circuit, and cylindrical cavity opening upwards form high impedance, prevent stray electrical current；Existing chokes ring dress
It is all from the a-circle-by-a-circle extension in the edge of earth plate to put, and retaining ring is deep near λ/4 so that antenna overall volume is larger,
The present invention is designed since the nearly centre in earth plate bottom using bending, the size of the half opening cylindrical cavity with slot is contracted significantly
Small, half-open oral cavity radius and chamber be deep and the slot number and length of half opening cylindrical cavity with slot by adjusting by the present invention in addition
Degree, can effectively suppress the generation of residual surface ripple circular current, can completely inhibit the back lobe that remaining circular current is formed, be formed
Likeness in formNormalized radiation pattern, wherein n is adjusted and selects according to pattern requirements, this sequential to suppress miscellaneous
The mechanism of scattered radiation can make inventive antenna realize the single lobe of the total space, no other, back lobe, and the total space is single main polarization
(RHCP) navigation terminal receiver ideal orientation figure.Above-mentioned technical characteristic forms sequential suppression to surface wave and stray electrical current
System, forms high anti-multipath efficiency.
Further, the polarization isolation work(separating device includes two input ports and two output ports, two inputs
Mouth is connected with the coaxial inner conductor of support component respectively, and in output port, one end of output RHCP signals is connected with receiver, another
Individual output port is connected with absorption resistance.
It is using the above-mentioned further beneficial effect of scheme：Thus LHCP signal absorptions that the absorption resistance will be drawn,
The power division network that the polarization isolation work(separating device is formed is different from general 3dB power splitters, it not only realize power distribution with
Outside 90 ° of phase shifts, moreover it is possible to orthogonally polarized component LHCP is absorbed, reflection and derotation component is absorbed, prevents to receiver direct signal
Interference.
A kind of communication equipment, include the high-acruracy survey type antenna of the high anti-multipath described in above-mentioned technical proposal.It is described logical
It can be the communication equipments such as receiver or base station to believe equipment.
Brief description of the drawings
Fig. 1 is a kind of sectional view of the high-acruracy survey type antenna of high anti-multipath of the present invention；
Fig. 2 is earth plate assembly plan view of the present invention；
Fig. 3 is Fig. 2 AA sectional views；
Fig. 4 is the top view of the two of the present invention half opening annulus chambers stacked；
Fig. 5 is Fig. 4 AA sectional views.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, central radiating element component, 2, support component, 3, ground connection board component, 4, half opening cylindrical cavity component, 5, polarization every
From work(separating device, 6, wave transparent encapsulated antenna cover, 7, cable tail.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
Antenna of the present invention can be used for High-precision carrier phase measurement type GNSS terminal receiver system, can act also as appointing
It what is the need for broadband to be formed, circular polarisation, hemispheric beam, there is the antenna of stable phase heart requirement.
Navigation positioning receiver is the basis of all applications in satellite navigation industry, receiver antenna be receiver it is important and
Nucleus equipment.As the popularization of application is with going deep into, the requirement more and more higher to receiver system accuracy, a kind of carrier phase
Measurement type receiver can realize the positioning precision of cm or even mm magnitudes, and corresponding antenna requirement is also that general antenna can not meet
's.Inventive antenna may be directly applied to new antenna (the abbreviation day of this high-acruracy survey type GNSS user's compatible receiver
Line) or network RTK antenna for base station, while be alternatively the radio receiving system for having similar requirement and antenna support etc. is provided.
The present invention considers that GNSS navigates spectral coverage application entirely, is focussed in particular on China's BD-2 systematic differences.It is of the present invention
Antenna not only fully meets High-precision carrier phase measurement type GNSS compatible receiver antenna requirements, has the single hemisphere of the total space
Wave beam, without rear back lobe, unmatched anti-multipath jamming ability, the speciality such as have body small, light, inexpensive.
As shown in figure 1, a kind of high-acruracy survey type antenna of high anti-multipath, including central radiating element component 1, support group
Part 2, ground connection board component 3, half opening cylindrical cavity component 4 and polarization isolation work(separating device 5；The central radiating element component 1 is fixed
In the top of support component 2, the support component 2 is fixed on the center of ground connection board component 3, and the half opening cylindrical cavity component 4 abuts
Ground connection board component 3 back side is co-axially mounted, and the polarization isolation work(separating device 5 is installed on the back side center of the ground connection board component 3
Position, the central radiating element component 1 are connected through the coaxial inner conductor built in support component 2 with polarization isolation work(separating device 5, day
Line is entirely sealed in wave transparent encapsulated antenna cover 6.
The present invention further adopts the following technical scheme that.
1. the wideband impedance match technology of the short short oscillator of the Wide-Band Design technology and capacitance compensation of cross covering of the fan oscillator.
Circle symmetrical structure centered on the central radiating element component 1, including the obtuse-angulate covering of the fan oscillator of four bendings, four
The individual covering of the fan oscillator pairwise orthogonal, form right-angled intersection radiating element.Inventive antenna central radiating element is orthogonal by 4
Broadband covering of the fan oscillator composition, belongs to short, short antenna, complete centrosymmetric structure, has the stable radiation phase heart, by exclusive
Widening frequency band designs and condensance compensation technique, realizes the Broadband Matching of feed.In 1.1-1.7MHz bands, port standing wave
Than VSWR≤1.2, the shared multifrequency of more stars, multimode application requirement have been fully met.
2. the integration technology that four support bars feed and matched with RF.
The support component 2 includes four support bars, two-by-two support bar Orthogonally arrangement, the central radiating element component 1
Each fan-shaped vibrator be respectively arranged in four support bar tops, four covering of the fan oscillators keep identical with ground connection board component 3
Highly.
Coaxial inner conductor with matching section built in two adjacent support bars in four support bars of the support component 2,
One end of the coaxial inner conductor is connected on the support bar coaxial inner conductor of offside, and the other end is defeated with polarization isolation work(separating device 5
Enter end to be connected,；Two other support bar forms the auxiliary allotment coaxial line of bottom short circuit simultaneously, and the auxiliary of the bottom short circuit is adjusted
The distribution capacity formed with coaxial line by top makes to keep microwave to be connected with covering of the fan oscillator side support bar coaxial inner conductor, is formed
0 °/180 ° of balanced feeding balun, and with forming impedance allotting network to the coaxial line of side support bar.The center radiation is single
Pass through dielectric ring one director of coaxial installation at the top of first component.The director uses a metal plate.
The support bar modular construction is full symmetric, even if two oscillators are not maintained near λ/4 with earth plate height, also not
The asymmetry of directional diagram can be caused because support bar outer wall electric current occurs.Oscillator height can be flexibly selected as needed, to carrying
The high antenna phase heart is stablized beneficial.
The earth plate 3 of central radiating element component 1 of the present invention and appropriate yardstick forms basic hemispheric beam unit
Antenna.According to antenna gain and the adjustable oscillator of cone of coverage requirement away from earth plate height, central radiating element component geometry is adjusted
Parameter adjusts its antenna pattern.With more flexibilities and adaptability.
3. suppression decay technique of the radial direction metal plate to surface wave propagation on earth plate.
As shown in Figure 3,4, the ground connection board component 3 is circle gold of the upper surface with multiple symmetrical Radial Coupling plates
Belong to flat board, Radial Coupling plate forms cut-off planar waveguide two-by-two, prevents surface wave transmission.The ground connection board component completes direction
The space filtering of figure figuration, vital effect, the ripple formed on the earth plate are served to improving multipaths restraint efficiency
Lead and be in cutoff modes state for the TE moulds (surface wave) along earth plate radial transport, multiple radial direction flat boards make surface wave (TE moulds)
It is attenuated in transmitting procedure, prevents stray radiation to disturb, the inventive antenna anti-multipath mechanism and chokes ring is different, nothing
Antenna aperture size need to be increased, its efficiency and frequency band are better than chokes loop antenna, and this antenna structure is lighter and handier, more compact, it is lower into
This, also has more excellent anti-multipath efficiency, broader frequency bandwidth characteristicses.
4. the half opening cylindrical cavity with slot is to surface wave and stray electrical current suppression technology.
As shown in Figure 4,5, the half opening cylindrical cavity component 4 is the annulus of 90 ° of bendings of multiple coaxial laminated belt slots.
When combining installation with ground connection board component, half opening cylindrical cavity is formed.Centre forms short circuit, and cylindrical cavity opening forms high impedance,
Stray electrical current and its radiation are prevented with the sequential effect of ground connection board component.In the cavity wall of the half opening cylindrical cavity with slot, from opening
Mouth end forms equidistant one group of slot, prevents remaining stray electrical current from forming circular current in cavity wall, and the cylindrical cavity radius and chamber are deep
It is straight to cause stray electrical current radiation to be suppressed completely and its quantity and size of slot adjust as needed.
When combining installation with ground connection board component, half opening cylindrical cavity, the short circuit of the center portion thereof position are formed, cylindrical cavity opening is formed
High impedance, prevent stray electrical current；The existing half opening cylindrical cavity with slot be all from the a-circle-by-a-circle installation in the edge of earth plate,
And retaining ring is deep near λ/4 so that antenna overall volume is larger, and the present invention is designed since earth plate bottom using bending,
It is substantially reduced the size of the half opening cylindrical cavity with slot, the slot that the present invention passes through half opening cylindrical cavity of the adjustment with slot in addition
Number and length, it can effectively suppress the generation of residual surface ripple circular current, the back lobe that can form remaining circular current is complete
Suppress, form likeness in formNormalized radiation pattern, wherein n is adjusted and selects according to pattern requirements, the present invention
Antenna realizes the navigation terminal receiver reason of the single lobe of the total space, no other, back lobe, and the total space single main polarization (RHCP)
Think directional diagram.Influence of the spuious loop circuit to radiation can be suppressed by the adjustment of slot quantity and size, further improved anti-
Multipath ability.
The present invention proposes the approach of three kinds of suppression multipaths, first, multiple symmetrical by being designed in earth plate upper surface
The circular metal flat board of Radial Coupling plate, Radial Coupling plate, which is formed, two-by-two ends planar waveguide, prevents surface wave transmission；Second,
Earth plate module backside is co-axially mounted half opening cylindrical cavity, prevents stray electrical current and its radiation；Third, in the cavity wall of half opening cylindrical cavity
On open multiple slots, prevent remaining stray electrical current cavity wall formed circular current；The combination of one or more is selected according to demand, with
Anti-multipath efficiency needed for being formed.
5. the polarization filtering of feeder equipment.
The polarization isolation work(separating device 5 includes two input ports and two output ports, two input port difference
It is connected with the coaxial inner conductor of support component 2, in output port, one end of output RHCP signals is connected with receiver, and another is defeated
Exit port is connected with absorption resistance.Thus LHCP signal absorptions that the absorption resistance will be drawn, the polarization isolation work(packing
The power division network for putting composition is different from general 3dB power splitters, and it is not only realized outside power distribution and 90 ° of phase shifts, moreover it is possible to is aligned
Hand over polarization components LHCP to absorb, prevent the interference to receiver direct signal.
6. the wave transparent encapsulated antenna cover (6) is to be installed on the medium-tight cover outside antenna, its satellite to L frequency ranges is led
Navigating, signal is almost loss-free to be penetrated, and has waterproof, Anti-ice-and-snow, meets that ground facility environment adapts to require.
Above-mentioned technical proposal also includes antenna house 6, the antenna house 6 by central radiating element component 1, support component 2, connect
Floor panel assembly 3, half opening cylindrical cavity component 4 and the cover of polarization isolation work(separating device 5 get up.
Antenna of the present invention can not only be used for passive antenna use, can be combined again with preselection filter and LNA to be formed it is active
Antenna, drawn by a cable 7 during as passive antenna, by cable 7 and receiver radio frequency front end during as active antenna
(or wave filter and LNA) is connected.
The present invention is not increasing receiver configuration, does not use multi-antenna-unit processing system and adaptive antenna, does not also adopt
(because this design can cause antenna volume, weight and cost substantially to increase, it is not suitable for small with usually used chokes ring structure
The design object of type, lightweight and low cost) in the case of, only with single antenna, by design concept and design method more
Newly, synthesis goes out the new GNSS receiver antenna suitable for high-acruracy survey type.
1. antenna of the present invention has captured the prerequisite key performance of high-acruracy survey type GNSS receiver antenna：
1) multiple frequency broad band, multiple navigation satellite signals can be received；2) the circular polarisation hemispheric beam of enough high-gains, directional diagram
With high circular symmetry, height roll-offs, high front and rear ratio；3) phase center of high stable；4) good wide-angle circular polarization characteristics.
2. antenna described in this law realizes the high-acruracy survey type antenna radiation pattern figuration of preferable high anti-multipath.
Inventive antenna possesses the high-acruracy survey type antenna radiation pattern of preferable high anti-multipath.Specifically：It is normalized
Antenna pattern should be the single lobe of total space likeness in form (1+cos θ)/2, no secondary lobe and back lobe；The total space is same main polarization
(RHCP), no cross polarization covering angular domain.This realization of goal does not use conventional chokes ring to suppress, but utilizes with slot
Half opening cylindrical cavity realizes more excellent anti-multipath efficiency to circular current suppression technology.
3. realize the miniaturization of antenna, lightweight and low cost；
Inventive antenna is intended not increasing receiver configuration, does not use multi-antenna-unit processing system and adaptive antenna,
Also in the case of not using 3D chokes ring and PBG (photo band gap, photon band gap) structure, only with single antenna, by setting
The renewal of meter theory and design method, synthesis go out the GNSS receiver antenna of new high-acruracy survey type.Inventive antenna must
Small-sized, light weight, highly reliable, inexpensive must be accomplished.
It is as follows with existing similar antenna technology performance comparision, the technological merit of antenna of the present invention.
1) broadband is suitable for and more stars, multimode GNSS compatible receiver adapteds.Micro-strip paster antenna and four arm spiral days
Line is commonly conventional GPS antenna.Belong to mode of resonance antenna, be adapted to single-frequency or narrowband operation.Though inventive antenna is
Electronically small antenna, the broadband character of miniature antenna is realized, in 1.1GHz-1.6GHz bands, VSWR is smaller than 1.5：1.
2) there are good circular symmetry and wide-angle circular polarization characteristics.Inventive antenna is complete center circle symmetrical junction
Structure；Antenna pattern circle is symmetrical, in ± 60 ° of work angular domain, circle asymmetry≤± 0.5dB；Wide-angle circular polarisation, ±
In 60 ° of work angular domain, AR≤2dB.
3) present invention is formed and surface wave and clutter is cut using multiple centrosymmetric radial direction planar waveguides on earth plate
Only wave guide mode, prevent radiation interference, the height for realizing directional diagram roll-offs, it is high it is front and rear than and good wide-angle circular polarization characteristics, greatly
Inhibit multipath effect greatly.This has not only reached the anti-multipath effect using Ckoke rings, and light in band spread and structure
Small, compact aspect is better than usually used Choke-Ring loop antennas.
4) present invention sequentially employs the side that clutter radiation is involved on a variety of suppression surfaces in Φ~200mm bore
Method, make multipaths restraint positive effect increase.Not only size, volume, weight substantially reduce compared with conventional Choke-Ring, and
And the frequency range limitation for going chokes ring to suppress, multipaths restraint effect are thoroughly intact.
5) inventive antenna has sufficiently stable radiating phase center.Entirely navigating in frequency range, phase heart dispersion PCV (1
σ) it is less than 1mm, fully meets the application demand of High-precision carrier phase measurement type receiver antenna.
6) projecting point of inventive antenna is that the feeder equipment of antenna not only realizes four null circles to central radiating element
Polarization feed, and exclusive polarization filtering performance, are effectively isolated interference of the multipath signal to reception signal.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (7)
1. the high-acruracy survey type antenna of a kind of high anti-multipath, it is characterised in that including central radiating element component (1), support
Component (2), ground connection board component (3), half opening cylindrical cavity component (4), polarization isolation work(separating device (5) and wave transparent encapsulated antenna cover
(6)；
The central radiating element component (1) is fixed on the top of support component (2), and the support component (2) is fixed on ground connection
Board component (3) center, the half opening cylindrical cavity component (4) are co-axially mounted against ground connection board component (3) back side, the polarization isolation
Work(separating device (5) is installed on the back side center of the ground connection board component (3), and the central radiating element component (1) is through branch
Coaxial inner conductor built in support component (2) is connected with polarization isolation work(separating device (5), and antenna is entirely sealed in wave transparent encapsulated antenna cover
(6) in；
The ground connection board component (3) is the circular metal flat board that upper surface carries multiple symmetrical Radial Coupling plates, two-by-two footpath
Cut-off planar waveguide is formed to coupling plate, prevents surface wave transmission；
The half opening cylindrical cavity component (4) is the half opening cylindrical cavity of multiple coaxial laminated belt slots, with being grounded board component (3) group
When closing installation, centre forms short circuit, and cylindrical cavity opening forms high impedance, and stray electrical is prevented with the sequential effect of ground connection board component
Stream and its radiation；
In the cavity wall of the half opening cylindrical cavity with slot, equidistant one group of slot is formed from openend, is prevented remaining spuious
Electric current forms circular current in cavity wall, and the quantity and size of the cylindrical cavity radius and chamber depth and its slot adjust as needed, straight to cause
Stray electrical current radiation is suppressed completely.
A kind of 2. high-acruracy survey type antenna of high anti-multipath according to claim 1, it is characterised in that the center radiation
Circle symmetrical structure centered on unit block (1), including the obtuse-angulate covering of the fan oscillator of four identical bendings, four covering of the fans shake
Sub- pairwise orthogonal, form right-angled intersection radiating element.
A kind of 3. high-acruracy survey type antenna of high anti-multipath according to claim 2, it is characterised in that the support component
(2) four support bars are included, two-by-two support bar Orthogonally arrangement, each fan-shaped vibrator point of the central radiating element component (1)
Four support bar tops, four covering of the fan oscillators height identical with ground connection board component (3) holding are not installed on.
A kind of 4. high-acruracy survey type antenna of high anti-multipath according to claim 3, it is characterised in that the support component
(2) coaxial inner conductor with matching section built in two adjacent support bars in four support bars, one end of the coaxial inner conductor
It is connected on the support bar cored wire of offside, the other end is connected with the input of polarization isolation work(separating device (5), forms 0 °/180 °
Balanced feeding balun；Two other support bar forms the auxiliary allotment coaxial line of bottom short circuit simultaneously, the bottom short circuit
The distribution capacity that auxiliary allotment coaxial line is formed by top makes to keep microwave to side support bar coaxial inner conductor and its covering of the fan oscillator
Connection, and with forming impedance allotting network to the coaxial line of side support bar.
A kind of 5. high-acruracy survey type antenna of high anti-multipath according to claim 1, it is characterised in that the center radiation
Pass through dielectric ring one circular metal plate for being used as director of coaxial installation at the top of unit block (1).
A kind of 6. high-acruracy survey type antenna of high anti-multipath according to claim 1, it is characterised in that the polarization isolation
Work(separating device (5) includes two input ports and two output ports, and two input ports are coaxial with support component (2) respectively
Cored wire is connected, and in output port, one end of output RHCP signals is connected with receiver, another output port and absorption resistance phase
Even.
A kind of 7. communication equipment, it is characterised in that the high accuracy survey including the high anti-multipath any one of claim 1-6
Amount type antenna.
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| CN108206324B (en) * | 2016-12-16 | 2019-10-29 | 香港城市大学深圳研究院 | Compact high-performance GNSS antenna |
| CN107181056B (en) * | 2017-05-16 | 2022-08-30 | 叶云裳 | Microwave attenuation type GNSS measurement type antenna and equipment |
| CN108123206A (en) | 2017-12-20 | 2018-06-05 | 深圳市华信天线技术有限公司 | A kind of antenna mounting seat and antenna |
| CN109103587B (en) * | 2018-08-06 | 2024-01-05 | 上海海积信息科技股份有限公司 | Four-arm spiral antenna |
| CN108761502B (en) * | 2018-08-31 | 2024-02-02 | 广东圣大电子有限公司 | Multimode GNSS test receiver with accurate phase center |
| CN109390671B (en) * | 2018-11-06 | 2020-08-14 | 西安矩阵无线科技有限公司 | Satellite-borne high-precision navigation positioning antenna |
| CN109687109A (en) * | 2018-12-27 | 2019-04-26 | 上海华测导航技术股份有限公司 | Than high-precision satellite navigation and positioning antenna before and after a kind of broadband is high |
| CN113228414B (en) * | 2018-12-28 | 2023-05-12 | 华为技术有限公司 | Antenna, microwave equipment and communication system |
| CN110137673B (en) * | 2019-04-23 | 2020-05-19 | 南京恒舟准导航科技有限公司 | Mushroom head PNT combined antenna and equipment thereof |
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