CN206225562U - A kind of low axle in the broadband of anti-multipath jamming compares GNSS antenna - Google Patents
A kind of low axle in the broadband of anti-multipath jamming compares GNSS antenna Download PDFInfo
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- CN206225562U CN206225562U CN201621249072.0U CN201621249072U CN206225562U CN 206225562 U CN206225562 U CN 206225562U CN 201621249072 U CN201621249072 U CN 201621249072U CN 206225562 U CN206225562 U CN 206225562U
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- medium substrate
- microstrip line
- phase
- line work
- shift network
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Abstract
The utility model discloses a kind of low axle in the broadband of anti-multipath jamming than GNSS antenna, including four rectangular radiation elements, corresponding four triangle map connection units, four vias, microstrip line work(point phase-shift network, feed via, medium substrate, disc floor, four via circles, feed via circle, metallic cylinders；Four rectangular radiation elements and four triangle map connection unit structures in a center of symmetry, it is placed on the surface of medium substrate, four vias pass through medium substrate, triangle map connection unit is connected with the port of microstrip line work(point phase-shift network, microstrip line work(point phase-shift network is located at the back side of medium substrate, feed via is used to connect microstrip line work(point phase-shift network and coaxial feeder inner wire, and medium substrate front is disc floor, disc floor edge connection metallic cylinder.The features such as the utility model has anti-multipath jamming, broadband, low axle ratio, broad beam, small size.
Description
Technical field
The utility model is related to field of antenna, refers in particular to a kind of low axle in the broadband of anti-multipath jamming and compares GNSS antenna.
Background technology
GNSS refers to GLONASS (Global Navigation Satellite System), GNSS antenna
It is the terminal antenna for receiving satellite-signal.With the addition of big-dipper satellite alignment system, GNSS system Major Members become four
It is individual：The Galileo in the GPS in the U.S., Russian GLONASS, the Big Dipper of China and Europe.In view of satellite navigation system is huge
Economic worth and strong military Strategic Demand, the highland that GNSS is competed as high-tech, its research is constantly subjected to various countries
Pay attention to.Due to different from mobile communication antenna polarization reception aspect, GNSS antenna needs particular design, and because it should
It is complicated with scene, it is disturbed larger, performance indications requirement is more harsh compared with the terminal called antenna such as mobile phone.
Since being come into operation from GPS of America global position system in 1964, satellite navigation industry is flourished.It is major
Successively input huge fund researches and develops navigation system for state, and this more promotes the development of satellite navigation industry.Appoint for that can launch and receive
The electromagnetic wave of polarised direction of anticipating, GNSS antenna uses circular polarisation mode.Conventional satellite communication frequency range has GPS：L1：1575MHz,
L2：1227MHz, L5:1176MHz；Beidou II：B1:1561MHz；B2:1207MHz；B3:1268MHz；GLONASS：
1612MHz.Comprehensive conventional satellite communication frequency range, if designing a antenna can cover current all GNSS signals, bandwidth is at least
Need to cover 1160MHz-1615MHz.GNSS antenna mainly uses right-handed circular polarization mode, thus brings weak satellite antenna to believe
Number easily by multipath fading and interference problem.Additionally, satellite antenna signals are weaker, GNSS reception antennas need it is higher and compared with
Stable gain；Circular polarized antenna also faces the problem of phase-unstable in larger frequency range.Therefore to design a small
Size, can anti-multipath jamming, broadband, low axle be a difficult point than, the GNSS antenna of high-gain, phase stabilization, broad beam.
Theoretical and industrial research on GNSS antenna has compared deeply.Realize that broadband circle polarized major way has many
Resonance and multimode；Realize that low axle is more symmetrical than the method mainly structure height of, high-gain, Net long wave radiation cellar area is tried one's best greatly.
Multi-resonant is multiple resonance points combination that multiple radiating elements are produced, or introduces parasitic element and produce broadband character.Multimode
Realize mainly by microstrip antenna multi-mode feature, higher mode is decomposed by gap loading, make main mould and higher mode in specific frequency
Nearly orthogonal degenerate mode in section, circular polarisation is realized with this.
2008, Chu Qingxin et al. delivered A stacked on Asia Pacific Microwave Conference
dual-band equilaterall-triangular circularly polarized microstrip antenna.Text
Middle coaxial inner conductor is connected feed with upper strata paster by the way of double-layer paster is stacked, coaxially outer outer conductor and medium substrate
Back side floor connects.Paster produces a resonance point as a single resonance radiation unit, lower floor's parasitic patch utilize with
The electromagnetic coupled of upper strata paster produces the close resonance point of another frequency, two resonance points to be close to, and W is formed on S11 curves
Type, so as to realize broadband character, and the resonant frequency of two pasters is individually controllable, with larger advantage.
German A.E.Popugaev in 2009 et al. has delivered entitled A NOVEL HIGH PERFORMANCE
The article of ANTENNA FOR GNSS APPLICATIONS.Propose that feeding network and radiating element are separated in text, using Weir gold
Gloomy power splitter and quarter-wave microstrip line, realize that output port phase differs 90 degree successively, and amplitude is identical.Four feeds
The network port connects four coaxial conductors respectively, and coaxial conductor passes through medium substrate via and upper floor；Four coaxial conductors
Upper strata square-shaped metal radiant panel is connected by set square, for adjustment is matched and has certain antijamming capability, in center radiation
It is uniform around unit to put 12 ground connection quadrangle metal patches.The antenna has relatively wide axial ratio bandwidth, while front and rear ratio
And return loss shows preferable characteristic.But antenna processing is complex, stability is difficult to control.
2013, Son Xuat Ta et al. were in IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
On deliver entitled Multi-band, wide-beam, circularly polarized, crossed, asymmetrically
The article of barbed dipole antennas for GPS applications.SF single feed mode is proposed in text, it is coaxially interior to lead
Body connects two groups of resonant elements on upper strata through floor, and each group of resonant element produces 90 degree by 3/4ths annulus
Phase shift, and power is equal, realizes circular polarization characteristics.Two groups of orthogonal placements of resonant element, form centrosymmetric structure.Together
Multiple resonance minor matters produce different frequency resonance point to expand bandwidth on the single resonant elements of Shi Liyong, finally realize high-performance entelechy
Change antenna.The GNSS antenna has multiband, high-gain, the outstanding advantages such as simple, low axle ratio, high efficiency of doing manual work.
The content of the invention
The purpose of this utility model is the shortcoming and deficiency for overcoming prior art, there is provided a kind of broadband of anti-multipath jamming
Low axle than GNSS antenna, the features such as the GNSS antenna has anti-multipath jamming, broadband, low axle ratio, broad beam, small size, while
Antenna radiation unit is relatively easy, easy to assembly, and the GNSS antenna is suitable on the terminal device of precision navigation.
To achieve the above object, technical scheme provided by the utility model is：A kind of low axle in the broadband of anti-multipath jamming
Than GNSS antenna, including four structure identical rectangular radiation elements, corresponding four triangle map connection units, four mistakes
Hole, microstrip line work(point phase-shift network, feed via, medium substrate, disc floor, four via circles, feed via circle, metals
Cylinder；Four rectangular radiation elements, four triangle map connection unit structures in a center of symmetry, form windmill, put
Put in the surface of medium substrate, the rectangular radiation element is used to produce circular polarization radiation, and triangle map connection unit is three
Angled metal piece, realizes the impedance matching of rectangular radiation element and microstrip line work(point phase-shift network port, and four vias are worn
Medium substrate is crossed, triangle map connection unit is connected with four mouths of microstrip line work(point phase-shift network by coaxial conductor
Logical, the microstrip line work(point phase-shift network is located at the medium substrate back side, by annular power splitter, Wilkinson power divider and pair net
Network regulation minor matters are collectively formed, and the matching network regulation minor matters are realized by two groups of Symmetrical Circular Arcs, and the feed via is used to connect
Connect microstrip line work(point phase-shift network and coaxial feeder inner wire.Medium substrate front is disc floor, four vias circle
And feed via circle is located at five via outsides on medium substrate, for insulated conductor and disc floor；The round metal
Cylinder is located at disc floor edge, is connected with disc floor simultaneously and four rectangular radiation elements are high together, for anti-multipath jamming
With reduction axle ratio.
Realize that power is equal by annular power splitter, the annular power splitter in the microstrip line work(point phase-shift network self feeding port
Deng distribution, phase difference 180 degree adjusts the annular power splitter two-port power distribution, by microstrip line by micro belt line width
Length adjustment its phase difference, i.e.,：Annular power splitter can individually adjust power distribution by the line width of microstrip line and line length
And phase difference.
The utility model compared with prior art, has the following advantages that and beneficial effect：
1st, compared with existing GNSS antenna, the utility model is using microstrip line work(point phase-shift network and rectangular radiation element
The mode of separation.Microstrip line work(point phase-shift network keeps preferable phase, amplitude, impedance stabilization special in frequency band range wider
Property, and then realize the Broadband Matching of GNSS antenna.Annular power splitter is passed through in the microstrip line work(point phase-shift network self feeding port,
The annular power splitter realizes the impartial distribution of power, and phase difference 180 degree adjusts its two-port by annular power splitter micro belt line width
Power distribution, by annular its two-port phase difference of power splitter microstrip line length adjustment, i.e.,：Annular power splitter can be by micro-strip
The line width and line length of line individually adjust power distribution and phase difference.
2nd, compared with existing GNSS antenna, the utility model, should using the metallic cylinder with anti-multipath jamming characteristic
Structure can improve antenna gain, suppress back lobe, and regulation matching is so as to obtain broader axial ratio bandwidth.Rectangle of the present utility model
Radiative unit structure is simple in rule, Central Symmetry distribution, forms windmill, after being combined with microstrip line work(point phase-shift network, antenna
It is overall that there is relatively low axle ratio, show fabulous circular polarization characteristics.
3rd, compared with existing GNSS antenna, the utility model antenna has broader axial ratio bandwidth, smaller size, more
Axle wide than beam angle, bigger return loss, higher and stable gain, compared to existing GNSS antenna, with more preferable
Performance.
Brief description of the drawings
Fig. 1 is rectangular radiation element schematic top plan view of the low axle in broadband than GNSS antenna for being applied to anti-multipath jamming.
Fig. 2 is that the low axle in broadband for being applied to anti-multipath jamming is illustrated than GNSS antenna medium substrate front disc floor
Figure.
Fig. 3 is the low axle in broadband for being applied to anti-multipath jamming than GNSS antenna medium substrate back side microstrip line work(point phase shift net
Network schematic diagram.
Fig. 4 is schematic perspective view of the low axle in broadband than GNSS antenna for being applied to anti-multipath jamming.
Fig. 5 is that the low axle in broadband for being applied to anti-multipath jamming emulates schematic diagram than the S11 of GNSS antenna.
Fig. 6 is axle of the low axle in broadband than GNSS antenna for being applied to anti-multipath jamming than emulation schematic diagram.
Fig. 7 is that the low axle in broadband for being applied to anti-multipath jamming emulates schematic diagram than the gain of GNSS antenna.
Specific embodiment
With reference to specific embodiment, the utility model is described in further detail.
As shown in Figures 1 to 4, the low axle in the broadband of anti-multipath jamming described in the present embodiment is more identical including four than GNSS antenna
Rectangular radiation element 1, medium substrate 2 is that FR_4, dielectric constant are 4.4, thickness for 1mm, radius are the disc of 72mm；Figure
2 is the positive disc floor of medium substrate, four identical via circles 3, and corresponding via 6, and feed via justifies 4 and feedback
Electric via 5, cuts away the disc floor 7 of four via circles and a feed via circle；Fig. 3 is the microstrip line at the medium substrate back side
Work(point phase-shift network, wherein being collectively formed by flower type microstrip line 8 and linear pattern microstrip line 9 in annular power splitter, Wilkinson
Power splitter 10, isolation resistance 11, impedance transition mechanism microstrip line 12, matching network regulation minor matters 13；Fig. 4 intermediate cam shape impedance matching lists
Unit 14, coaxial conductor connecting line 15, metallic cylinder 16.Four identical rectangular radiation elements 1 Central Symmetry is placed, distance
Floor level is 40mm, and rectangular radiation element 1 passes through triangle impedance matching unit 14 and coaxial conductor connecting line 15 and position
It is connected in microstrip line work(point four ports of phase-shift network at the medium substrate back side, the radius of via circle 3 is the twice of via 6；Institute
State the radius of feed via 5 and feed 4 radiuses of via circle respectively with via 6, via circle 3 identical；It is positive positioned at medium substrate
Cut away four via circles 3 and feed via circle 4 in disc floor 7.
The microstrip line work(at the medium substrate back side point phase-shift network is mainly made up of unit 5-13, flower type microstrip line 8
Annular power splitter is collectively formed with linear pattern microstrip line 9, the impartial distribution of power, and phase difference 180 degree is realized；The Weir gold
Gloomy power splitter 10 collectively forms the network of power reallocation with isolation resistance 11, realizes one point four of power distribution.Impedance transition mechanism
The two ends of microstrip line 12 connect 50 ohm microstrips and coaxial conductor respectively, play impedance matching effect, the matching network regulation
Minor matters 13 are located at 50 ohm microstrip ends, to adjust microstrip line work(point four impedances of port of phase-shift network, triangle impedance
Matching unit 14 is used to connect rectangular radiation element 1 and coaxial conductor connecting line, plays impedance over effect, coaxial conductor connecting line
It is welded on triangle impedance matching unit 14, is connected through medium substrate and with microstrip line work(point four ports of phase-shift network,
Realize the connection of rectangular radiation element 1 and microstrip line work(point phase-shift network；The metallic cylinder 16 and the outward flange of disc floor 7
Connection, to improve antenna gain and anti-multipath jamming, the height of metallic cylinder 16 is highly identical with rectangular radiation element 1, with
This realizes the reflected signal at the certain inclination angle of isolation, improves its anti-multipath jamming ability.
Fig. 1 is the rectangular radiation element schematic top plan view of the embodiment, and four rectangular radiation elements 1 are vertically put successively
Put, 90 degree of output characteristics is followed successively by according to microstrip line work(point phase-shift network constant amplitude and phase difference, produce circular polarization characteristics, rectangle
The width of radiating element 1 is relatively wide, and effective current path is more long, and impedance keeps stabilization in broad frequency band, therefore realizes broadband
Circular polarization characteristics, the rectangular radiation element 1 is 40mm apart from disc floor level, and reflecting plate work is played on disc floor 7
With, and isolate work(microstrip line point phase-shift network and rectangular radiation element, improve the antenna gain.
Fig. 2 is the medium substrate positive round floorpan schematic diagram of the embodiment.The disc floor is located at medium base
Plate front, four via circles 3 of excision, to prevent coaxial conductor from being contacted with disc floor 7, while the excision feedback of disc floor 7
Electric via circle 4, prevents feed coaxial inner conductor and disc floor contact.
Fig. 3 is the schematic diagram of the embodiment medium substrate back side microstrip line work(point phase-shift network, the microstrip line work(point
Phase-shift network is located at the medium substrate back side, mainly adjusts branch by annular power splitter, two Wilkinson power dividers and matching network
Section is constituted.The annular power splitter is mainly collectively formed by flower type microstrip line 8 and linear pattern microstrip line 9, the length of regulation 8 and 9
Degree can control two phase differences of port of annular power splitter, adjust its two power distribution of port of width energy controller, so that
Realize annular power splitter port phase difference is for 180 degree and power is equal.Two Wilkinson power dividers 10 and isolation resistance 11
The one-to-two again of annular power splitter is completed, four constant power distribution of port are realized.It is four/wavelength by electrical length difference
50 ohm microstrips, realize two phase differences of port of Wilkinson power divider be 90 degree.Impedance transition mechanism microstrip line 12 is connected
50 ohm microstrips and coaxial conductor connecting line 15, play impedance matching effect, while matching network adjusts minor matters 13 to port
Matching be adjusted, equally play regulation matching effect.
Fig. 5 is the S11 simulation results of the embodiment, and -15dB the bandwidth of the embodiment covers 1.12GHz-1.64GHz,
Its relative impedances band a width of 37.7%, is completely covered current GNSS communications bands；Fig. 6 is the embodiment left-hand circular polarization and dextrorotation
The gain of the gain simulation result of circular polarisation, wherein right-handed circular polarization in the impedance bandwidth frequency range is above 4dB and keeps steady
It is fixed, and the gain in the impedance bandwidth of left-hand circular polarization is respectively less than -18dB；Fig. 7 is the axle bit linearity curve of the embodiment,
The axle ratio of embodiment is no more than 1dB in the impedance bandwidth, with fabulous broadband height circular polarization characteristics.
Embodiment described above is only the preferred embodiment of the utility model, not limits implementation of the present utility model with this
Scope, therefore the change that all shapes according to the utility model, principle are made, all should cover in protection domain of the present utility model.
Claims (2)
1. a kind of low axle in the broadband of anti-multipath jamming compares GNSS antenna, it is characterised in that：Including four structure identical rectangle spokes
Unit is penetrated, and corresponding four triangle map connection units and four vias, the microstrip line work(point at the medium substrate back side are moved
Phase network, feed via, medium substrate, disc floor, four via circles, feed via circle, metallic cylinders；Four squares
Shape radiating element, four triangle map connection unit structures in a center of symmetry, form windmill, are being placed on medium substrate just
Top, four rectangular radiation elements produce circular polarization radiation, and triangle map connection unit is triangle metal piece, realizes rectangle
Radiating element is matched with the port Impedance of microstrip line work(point phase-shift network, and four vias pass through medium substrate, by coaxial
With four mouths of microstrip line work(point phase-shift network be connected triangle map connection unit by conductor, the microstrip line work(point phase shift
Network is located at the medium substrate back side, is collectively formed by annular power splitter, Wilkinson power divider and matching network regulation minor matters, institute
Matching network regulation minor matters are stated to be realized by two groups of Symmetrical Circular Arcs, the feed via be used to connecting microstrip line work(point phase-shift network and
Coaxial feeder inner wire, medium substrate front is disc floor, and four vias circle and feed via circle are located at correspondence
Five via outsides on medium substrate, for isolating inner wire and disc floor；The metallic cylinder is located at disc floor
Edge, is connected simultaneously with disc floor and four rectangular radiation elements is high together, for anti-multipath jamming and reduction axle ratio.
2. a kind of low axle in broadband of anti-multipath jamming according to claim 1 compares GNSS antenna, it is characterised in that：It is described micro-
By annular power splitter, the annular power splitter realizes the impartial distribution of power, phase phase for band line work(point phase-shift network self feeding port
Difference 180 degree, adjusts its two-port power distribution, by the micro-strip line length of annular power splitter by the micro belt line width of annular power splitter
Degree adjusts its two-port phase difference, i.e.,：Annular power splitter can individually adjust power by the line width of microstrip line and line length
Distribution and phase difference.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621249072.0U CN206225562U (en) | 2016-11-17 | 2016-11-17 | A kind of low axle in the broadband of anti-multipath jamming compares GNSS antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621249072.0U CN206225562U (en) | 2016-11-17 | 2016-11-17 | A kind of low axle in the broadband of anti-multipath jamming compares GNSS antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987929A (en) * | 2018-07-16 | 2018-12-11 | 成都赛康宇通科技有限公司 | A kind of compact phased array antenna system of microwave and millimeter wave |
| CN109037937A (en) * | 2018-08-06 | 2018-12-18 | 北方工业大学 | Wide-beam circularly polarized antenna applied to satellite positioning |
| CN110635246A (en) * | 2019-09-04 | 2019-12-31 | 广州吉欧电子科技有限公司 | GNSS choke coil antenna based on wave-absorbing material |
-
2016
- 2016-11-17 CN CN201621249072.0U patent/CN206225562U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987929A (en) * | 2018-07-16 | 2018-12-11 | 成都赛康宇通科技有限公司 | A kind of compact phased array antenna system of microwave and millimeter wave |
| WO2020015027A1 (en) * | 2018-07-16 | 2020-01-23 | 成都赛康宇通科技有限公司 | Microwave/millimeter wave compact phased-array antenna system |
| CN109037937A (en) * | 2018-08-06 | 2018-12-18 | 北方工业大学 | Wide-beam circularly polarized antenna applied to satellite positioning |
| CN110635246A (en) * | 2019-09-04 | 2019-12-31 | 广州吉欧电子科技有限公司 | GNSS choke coil antenna based on wave-absorbing material |
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Granted publication date: 20170606 Termination date: 20191117 |
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| CF01 | Termination of patent right due to non-payment of annual fee |