CN103872454A - Anti-multipath interference antenna for GNSS - Google Patents
Anti-multipath interference antenna for GNSS Download PDFInfo
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- CN103872454A CN103872454A CN201410112033.5A CN201410112033A CN103872454A CN 103872454 A CN103872454 A CN 103872454A CN 201410112033 A CN201410112033 A CN 201410112033A CN 103872454 A CN103872454 A CN 103872454A
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Abstract
The invention discloses an anti-multipath interference antenna for a GNSS. The anti-multipath interference antenna is miniaturized, low in profile, low in cost and easy to process. The anti-multipath interference antenna comprises a first medium layer and a floor fixed on the upper surface of the first medium layer. The floor is provided with an annular groove and divided into an internal area and an external area by the annular groove. The internal area and the external area are connected through a plurality of lumped resistors which are connected to the two sides of the annular groove in a bridging mode. A second medium layer and a microstrip patch layer are fixed on the upper surface of the internal area of the floor, wherein the microstrip patch layer is fixed on the upper surface of the second medium layer. According to the anti-multipath interference antenna, as it is unnecessary to arrange a multilayer fold structure on the floor, the profile height of the antenna can be reduced greatly. The antenna is small in size, light in weight, low in cost, small in lateral dimension and convenient to install and carry. Compared with a solid floor with the same size, the backward cross-polarization of the antenna can be lowered by 13dB or more to the maximum degree, and the maximum gain of co-polarization can keep unchanged basically. The anti-multipath interference antenna is suitable for being popularized and applied in the technical field of GNSSs.
Description
Technical field
The present invention relates to GNSS technical field, be specifically related to a kind of anti-multipath potato masher antenna for GNSS.
Background technology
In global navigation satellite system (GNSS), it is one of principal element causing system position error that multipath disturbs.It is to arrive satellite receiver by the signal after reflection and the diffraction of atmosphere and earth's surface object to produce that multipath disturbs.Compared with the arriving signal of direct projection path, these signals have different or contrary amplitude, phase place and polarization information, and the differentiation of meeting interference receiver declines systematic function.Therefore, how effectively anti-multipath disturbs and has become GNSS and apply a difficult problem urgently to be resolved hurrily.
Itself be easy to identification filtering for the multipath signal receiver of long delay.But for the signal of delay multipath in short-term by floor and object reflection around and diffraction, receiver is difficult to it to produce with being subject to atmospheric environment time delay influence the regular direct signal fluctuating and differentiates, thereby is easy to cause receiver erroneous judgement.Although in some round-the-clock ground monitoring stations, the impact of delay multipath signal in short-term can be eliminated by back end signal processing capacity.But in the higher system of requirement of real-time and application, the reception antenna that adopts a anti-multipath to disturb is undoubtedly a kind of more effective method.
The multipath being caused by reflection and the earth's surface ground roll on ground disturbs, most region, the Huo Fu elevation angle, the low elevation angle (being the lower half-space of antenna) from antenna, therefore can, by the antenna of receiver is carried out to particular design, change the interference that its pattern characteristics suppresses this region.
In the region, the Ji Fu elevation angle, the low elevation angle of antenna, multipath disturbs and mainly contains two sources: diffraction and reflection.The polarization of diffracted signal generally still keeps main pole (right-handed circular polarization RHCP), and its arrival bearing mainly concentrates on low elevation angle district (near horizontal plane direction).Therefore, suppress diffracted signal, need to reduce antenna in the low elevation angle district main poleization gain of (elevation angle is less than 5 °).On the other hand, the reflected signal elevation angle district (horizontal plane following) that mainly comes to think highly of oneself, and its polarization mode mostly is left-hand circular polarization (LHCP).If thereby antenna can keep good cross-polarization performance in negative elevation angle district, just can well suppress the interference of this part signal.Wherein, for aforementioned 2 performance requirements, key is in the realization of low-cross polarization performance in negative elevation angle district.
The Antenna Design scheme of disturbing for multipath at present mainly comprises Choke Ring antenna, based on EBG(electro-magnetic bandgap) antenna of structure and adopt the antenna etc. on impedance transition mechanism floor.Choke Ring antenna utilizes fold floor to form the quarter-wave transmission line of terminal short circuit, on the surface near upper apex of fold, shows the characteristic of high impedance.This artificial high impedance surface can stop TE ripple and TM wave propagation effectively, thereby effectively suppresses radiation and the diffraction effect of floor edge.And oblique this surperficial ripple that is mapped to all can be regarded the synthetic of TE ripple and TM ripple as arbitrarily.But this antenna requires at least quarter-wave depth of folding and multilayer concentric fold ring could obtain the effect of expecting.Therefore the common section of this antenna is high, weight is large, is unfavorable for carrying, installs and moves.
The first grade design is to adopt the floor with similar EBG structure to replace fold floor in addition.EBG structure has and the similar function of pleated structure, can form high impedance surface and suppress surface wave, and then improving the backward radiation performance of antenna.Although it is slightly not enough that the performance of this antenna is compared Choke Ring antenna, its advantage is to have lighter weight and lower section, and EBG structure can utilize printed circuit board (PCB) manufacture, processes more convenient.But, in order to obtain good performance, EBG floor, laterally forming certain periodic structure, makes horizontal size larger.
Also have a class to utilize impedance transition mechanism floor to suppress the design that multipath disturbs, can in very wide frequency band, keep good performance.The surface impedance on this designing requirement floor is exponent increase from the center to edge, thereby suppresses surface current.This floor conventionally adopts the impedance layer that has certain impedance operator at metal floor surface coating composite oxides or sectionally smooth join to make.But, the higher and difficult processing of the common cost in this floor.
Summary of the invention
Technical problem to be solved by this invention is to provide the anti-multipath potato masher antenna for GNSS of a kind of miniaturization, low section, low cost, easy processing.
The present invention solves the problems of the technologies described above adopted technical scheme: this is used for the anti-multipath potato masher antenna of GNSS, comprise first medium layer and be fixed on the floor of the upper surface of first medium layer, on described floor, be provided with cannelure, floor is divided into inner region and outskirt by described cannelure, described inner region is connected by multiple lumped resistances that are connected across cannelure both sides with outskirt, the inner region upper surface on described floor is fixed with second medium layer and is fixed on the microband paste layer of second medium layer upper surface, on described microband paste layer, be provided with radiating slot and be connected with feed connection.
Further, described multiple lumped resistance is uniformly distributed along cannelure.
Further, described floor outskirt be shaped as annular.
Further, described floor, microband paste layer are copper layer.
Further, described second medium layer is fixed on the inner region upper surface on floor by plastic cement screw.
Beneficial effect of the present invention: by cannelure is set on floor, floor is divided into inner region and outskirt by described cannelure, described inner region is connected by multiple lumped resistances that are connected across cannelure both sides with outskirt, like this without the pleated structure that multilayer is set on floor, can make antenna section height greatly reduce, volume is little, lightweight, cost is low, and the floor of this structure does not have the restriction of periodic structure, lateral dimension is little, be convenient to install and carry, compared with the solid floor of formed objects, more than the backward cross polarization maximum of anti-multipath potato masher antenna for GNSS of the present invention can reduce 13dB.The backward cross polarization of antenna is mainly due to the radiation of floor surface ripple and floor edge diffraction, by cannelure is set, floor subregion is equivalent to floor to be divided into multiple radiation sources, by regulating the controllably plate current amplitude distribution of size of lumped resistance resistance, regulate the controllably plate current phase distribution of groove width of cannelure, the final radiation of controlling multiple radiation sources is interfered to disappear mutually just can make backward cross polarization obviously reduce, and can keep main pole maximum gain substantially constant.
Brief description of the drawings
Fig. 1 is the profile of the present invention for the anti-multipath potato masher antenna of GNSS;
Fig. 2 is the vertical view of the present invention for the anti-multipath potato masher antenna of GNSS;
Fig. 3 is the present invention for the dimensional drawing of analysing and observe of the anti-multipath potato masher antenna of GNSS;
Fig. 4 is the present invention for the dimensional drawing of overlooking of the anti-multipath potato masher antenna of GNSS;
Fig. 5 is the S11 curve chart of the anti-multipath potato masher antenna for GNSS described in the embodiment of the present invention;
Fig. 6 is the axial ratio curve chart of the anti-multipath potato masher antenna for GNSS described in the embodiment of the present invention;
Fig. 7 is the gain pattern (phi=0 degree) of the anti-multipath potato masher antenna for GNSS described in the embodiment of the present invention;
Fig. 8 is the gain pattern (phi=90 degree) of the anti-multipath potato masher antenna for GNSS described in the embodiment of the present invention;
Fig. 9 is the gain pattern contrast (phi=0 degree) that the floor of the anti-multipath potato masher antenna for GNSS described in the embodiment of the present invention loads lumped resistance front and back antenna;
Figure 10 is the gain pattern contrast (phi=90 degree) that the floor of the anti-multipath potato masher antenna for GNSS described in the embodiment of the present invention loads lumped resistance front and back antenna;
Description of symbols in figure: first medium layer 1, floor 2, inner region 201, outskirt 202, cannelure 3, lumped resistance 4, second medium layer 5, microband paste layer 6, radiating slot 7, feed connection 8.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As Fig. 1, described in 2, this is used for the anti-multipath potato masher antenna of GNSS, comprise first medium layer 1 and be fixed on the floor 2 of the upper surface of first medium layer 1, on described floor 2, be provided with cannelure 3, floor 2 is divided into inner region 201 and outskirt 202 by described cannelure 3, described inner region 201 is connected by multiple lumped resistances 4 that are connected across cannelure 3 both sides with outskirt 202, inner region 201 upper surfaces on described floor 2 are fixed with second medium layer 5 and are fixed on the microband paste layer 6 of second medium layer 5 upper surface, on described microband paste layer 6, be provided with radiating slot 7 and be connected with feed connection 8.By cannelure 3 is set on floor 2, floor 2 is divided into inner region 201 and outskirt 202 by described cannelure 3, described inner region 201 is connected by multiple lumped resistances 4 that are connected across cannelure 3 both sides with outskirt 202, like this without the pleated structure that multilayer is set on floor 2, can make antenna section height greatly reduce, volume is little, lightweight, cost is low, and the floor 2 of this structure does not have the restriction of periodic structure, lateral dimension is little, be convenient to install and carry, compared with the solid floor 2 of formed objects, more than the backward cross polarization maximum of anti-multipath potato masher antenna for GNSS of the present invention can reduce 13dB.The backward cross polarization of antenna is mainly due to the radiation of floor 2 surface waves and floor 2 edge diffractions, by cannelure 3 is set, floor 2 subregions are equivalent to floor 2 to be divided into multiple radiation sources, by regulating the controllably plate 2 current amplitudes distributions of size of lumped resistance 4 resistances, regulate the controllably plate 2 current phases distributions of groove width of cannelure 3, the final radiation of controlling multiple radiation sources is interfered to disappear mutually just can make backward cross polarization obviously reduce, and can keep main pole maximum gain substantially constant.
For the width of controlling floor 2 edge currents distributes mutually, described multiple lumped resistances 4 are uniformly distributed along cannelure 3.
Described feed structure can adopt existing various structure, and in order to ensure good feed effect, described feed connection 8 is preferably sub-miniature A connector.
In order to control the edge diffraction on floor 2, described floor 2 outskirts 202 be shaped as annular.
For easy to process, described floor 2, microband paste layer 6 are copper layer, and cannelure 3, radiating slot 7 can form by direct etching like this, can greatly cut down finished cost.
Described second medium layer 5 can be fixed on inner region 201 upper surfaces on floor 2 in several ways, as preferred mode is: described second medium layer 5 is fixed on inner region 201 upper surfaces on floor 2 by plastic cement screw.
Embodiment
Anti-multipath potato masher antenna for GNSS in the present embodiment is operated in L-band, and central task frequency is 1.575GHz, and first medium layer 1 adopts that relative dielectric constant is 2.65, the PTFE medium plate of thickness h 1=1mm; Second medium layer 5 adopts that relative dielectric constant is 2.25, the FR4 dielectric-slab of thickness h 2=4mm.Size design parameter for the anti-multipath potato masher antenna of GNSS is as described below: h1=1mm as shown in Figure 3, h2=4mm, st=2.5mm; As shown in Figure 4, r1=34.6mm, r2=41.5mm, Ls=23mm, Ws=1.35mm, fx=6.5mm, fy=6.5mm, R1=42.5mm, R2=45mm, R3=65mm.
Fig. 5 is the S11 curve chart of the anti-multipath potato masher antenna for GNSS described in the embodiment of the present invention;
Fig. 6 is the axial ratio curve chart of the anti-multipath potato masher antenna for GNSS described in the embodiment of the present invention;
Fig. 7 is the gain pattern phi=0 degree of the anti-multipath potato masher antenna for GNSS described in the embodiment of the present invention;
Fig. 8 is the gain pattern phi=90 degree of the anti-multipath potato masher antenna for GNSS described in the embodiment of the present invention;
As shown in Fig. 5,6,7,8, when the anti-multipath potato masher antenna for GNSS the present invention relates to is operated in centre frequency 1.575GHz, maximum gain reaches 6dB, and backward positive and negative 60 spend the be nearly all less than-20dB of cross polarization within the scope of 120-240 degree in i.e. figure.
Fig. 9 is the gain pattern contrast phi=0 degree that the floor of the anti-multipath potato masher antenna for GNSS described in the embodiment of the present invention loads lumped resistance front and back antenna;
Figure 10 is the gain pattern contrast phi=90 degree that the floor of the anti-multipath potato masher antenna for GNSS described in the embodiment of the present invention loads lumped resistance front and back antenna;
Simulation result in Fig. 9 and 10 shows, compared with the continuous floor of monoblock of formed objects, uses floor 2 of the present invention can make more than the backward cross polarization maximum of antenna can reduce 13dB, and can keep main pole maximum gain substantially constant.
Claims (5)
1. for the anti-multipath potato masher antenna of GNSS, it is characterized in that: comprise first medium layer (1) and be fixed on the floor (2) of the upper surface of first medium layer (1), on described floor (2), be provided with cannelure (3), floor (2) are divided into inner region (201) and outskirt (202) by described cannelure (3), described inner region (201) is connected by multiple lumped resistances (4) that are connected across cannelure (3) both sides with outskirt (202), inner region (201) upper surface on described floor (2) is fixed with second medium layer (5) and is fixed on the microband paste layer (6) of second medium layer (5) upper surface, on described microband paste layer (6), be provided with radiating slot (7) and be connected with feed connection (8).
2. the anti-multipath potato masher antenna for GNSS as claimed in claim 1, is characterized in that: described multiple lumped resistances (4) are uniformly distributed along cannelure (3).
3. the anti-multipath potato masher antenna for GNSS as claimed in claim 2, is characterized in that: described floor (2) outskirt (202) be shaped as annular.
4. the anti-multipath potato masher antenna for GNSS as claimed in claim 3, is characterized in that: described floor (2), microband paste layer (6) are copper layer.
5. the anti-multipath potato masher antenna for GNSS as claimed in claim 4, is characterized in that: described second medium layer (5) is fixed on inner region (201) upper surface of floor (2) by plastic cement screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410112033.5A CN103872454B (en) | 2014-03-25 | 2014-03-25 | For the anti-multipath jamming antenna of GNSS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410112033.5A CN103872454B (en) | 2014-03-25 | 2014-03-25 | For the anti-multipath jamming antenna of GNSS |
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| CN103872454A true CN103872454A (en) | 2014-06-18 |
| CN103872454B CN103872454B (en) | 2016-02-03 |
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| CN201410112033.5A Active CN103872454B (en) | 2014-03-25 | 2014-03-25 | For the anti-multipath jamming antenna of GNSS |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105428795A (en) * | 2015-12-18 | 2016-03-23 | 宝鸡烽火诺信科技有限公司 | Miniature low-frequency omnibearing planar antenna |
| CN106025534A (en) * | 2016-07-13 | 2016-10-12 | 苏州卡基纳斯通信科技有限公司 | Multi-frequency Beidou high-precision antenna |
| CN107181056A (en) * | 2017-05-16 | 2017-09-19 | 叶云裳 | A kind of microwave attenuation type high stable phase, high-precision GNSS measurement type antenna and equipment |
| CN108232440A (en) * | 2017-12-29 | 2018-06-29 | 吉林大学 | Orient ultra wide band magnetic dipole antenna and Ground Penetrating Radar road surface vertical fractures detection method |
| CN109462024A (en) * | 2018-11-01 | 2019-03-12 | 大连海事大学 | It is a kind of width axis than wave beam double frequency Beidou navigation antenna |
| CN112290222A (en) * | 2020-09-27 | 2021-01-29 | 南京大学 | Programmable anisotropic coded super surface |
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| WO2003079488A2 (en) * | 2002-03-15 | 2003-09-25 | The Board Of Trustees Of The Leland Stanford Junior University | Dual-element microstrip patch antenna for mitigating radio frequency interference |
| US20100117914A1 (en) * | 2008-11-10 | 2010-05-13 | Walter Feller | Gnss antenna with selectable gain pattern, method of receiving gnss signals and antenna manufacturing method |
| CN201725873U (en) * | 2010-07-26 | 2011-01-26 | 天津职业技术师范大学 | UWB microstrip patch antenna |
| CN102738572A (en) * | 2012-06-06 | 2012-10-17 | 东南大学 | Broadband directional microstrip patch antenna |
| CN202503105U (en) * | 2012-03-20 | 2012-10-24 | 广州市中海达测绘仪器有限公司 | Measurement-type GNSS receiving antenna |
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2014
- 2014-03-25 CN CN201410112033.5A patent/CN103872454B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003079488A2 (en) * | 2002-03-15 | 2003-09-25 | The Board Of Trustees Of The Leland Stanford Junior University | Dual-element microstrip patch antenna for mitigating radio frequency interference |
| US20100117914A1 (en) * | 2008-11-10 | 2010-05-13 | Walter Feller | Gnss antenna with selectable gain pattern, method of receiving gnss signals and antenna manufacturing method |
| CN201725873U (en) * | 2010-07-26 | 2011-01-26 | 天津职业技术师范大学 | UWB microstrip patch antenna |
| CN202503105U (en) * | 2012-03-20 | 2012-10-24 | 广州市中海达测绘仪器有限公司 | Measurement-type GNSS receiving antenna |
| CN102738572A (en) * | 2012-06-06 | 2012-10-17 | 东南大学 | Broadband directional microstrip patch antenna |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105428795A (en) * | 2015-12-18 | 2016-03-23 | 宝鸡烽火诺信科技有限公司 | Miniature low-frequency omnibearing planar antenna |
| CN105428795B (en) * | 2015-12-18 | 2019-02-26 | 宝鸡烽火诺信科技有限公司 | A kind of Miniaturized low-frequency omnidirectional plate antenna |
| CN106025534A (en) * | 2016-07-13 | 2016-10-12 | 苏州卡基纳斯通信科技有限公司 | Multi-frequency Beidou high-precision antenna |
| CN106025534B (en) * | 2016-07-13 | 2019-02-12 | 苏州卡基纳斯通信科技有限公司 | A kind of multifrequency Beidou high-precision antenna |
| CN107181056A (en) * | 2017-05-16 | 2017-09-19 | 叶云裳 | A kind of microwave attenuation type high stable phase, high-precision GNSS measurement type antenna and equipment |
| CN108232440A (en) * | 2017-12-29 | 2018-06-29 | 吉林大学 | Orient ultra wide band magnetic dipole antenna and Ground Penetrating Radar road surface vertical fractures detection method |
| CN108232440B (en) * | 2017-12-29 | 2020-09-22 | 吉林大学 | Ground penetrating radar pavement vertical crack detection method of directional ultra-wideband magnetic dipole antenna |
| CN109462024A (en) * | 2018-11-01 | 2019-03-12 | 大连海事大学 | It is a kind of width axis than wave beam double frequency Beidou navigation antenna |
| CN109462024B (en) * | 2018-11-01 | 2020-04-17 | 大连海事大学 | Double-frequency Beidou navigation antenna with wide axial ratio wave beams |
| CN112290222A (en) * | 2020-09-27 | 2021-01-29 | 南京大学 | Programmable anisotropic coded super surface |
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| CN103872454B (en) | 2016-02-03 |
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