CN109387860A - A kind of ladder ground structure improving antenna phase stability - Google Patents
A kind of ladder ground structure improving antenna phase stability Download PDFInfo
- Publication number
- CN109387860A CN109387860A CN201811477690.4A CN201811477690A CN109387860A CN 109387860 A CN109387860 A CN 109387860A CN 201811477690 A CN201811477690 A CN 201811477690A CN 109387860 A CN109387860 A CN 109387860A
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- medium substrate
- ladder
- phase stability
- ground structure
- earth plate
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- 239000000758 substrate Substances 0.000 claims description 56
- 230000005855 radiation Effects 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 15
- 239000002356 single layer Substances 0.000 description 5
- 238000004088 simulation Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Waveguide Aerials (AREA)
Abstract
The present invention discloses a kind of ladder ground structure for improving navigation antenna phase stability, overall structure is made of circular polarized antenna unit and ladder ground structure, by the load of ladder ground structure, the phase stability for the navigation antenna for keeping script phase stability bad is greatly improved；It can be directed to the not high disadvantage of conventional navigation antenna phase stability, provide a kind of effective solution.
Description
Technical field
The present invention relates to the applied technical fields of antenna demanding for phase stability in satellite navigation system, especially
It is related to a kind of ladder ground structure for improving antenna phase stability.
Background technique
Global Satellite Navigation System (Global Navigation Satellite System, GNSS) is at the earth's surface
Or terrestrial space provides the space base radio-navigation positioning system of real-time location information for user.Currently, the whole world mainly has four
Large satellite navigation system, respectively GPS (U.S.), GLONASS (Russia), GALILEO (European Union) and BeiDou (China).
Each navigation system can at the earth's surface or any place of terrestrial space for user provide round-the-clock three-dimensional coordinate, speed with
And temporal information.Has the characteristics that comprehensive, round-the-clock, all the period of time, high-precision.It is the complexity of multisystem, stage construction, multi-mode
Combined system.Global Satellite Navigation System be widely used in geodata acquisition, geodesic survey, resource exploration, crustal movement,
Nationality measurement and the fields such as engineering survey, vehicle monitoring and dispatching and navigation Service, boat army's navigation, military, time synchronization.Antenna is to defend
The important component of the high-precision receiver of star navigation system, performance are directly related to the precision of positioning.Satellite navigation system
System measuring receiver will track multi-satellite simultaneously at work, and the elevation angle and azimuth of each satellite are all different, because
This causes the phase center of receiving antenna that can change with the elevation angle, azimuth and antenna form of different satellite-signals.Receive day
Line can introduce error caused by Phase center variation when carrying out location observation to multi-satellite.The phase center of antenna is stablized
Property and multipath effect are the appreciable error sources of high precision measuring system.The phase center of antenna, which refers to, assumes that antenna is one ideal
Point source, equiphase surface is a spherical surface, then the position where the centre of sphere, that is, point source is the phase center of antenna.In order to completely describe
Antenna phase center characteristic introduces the concept at average phase center, phase center offset PCO and Phase center variation amount PCV.
If average phase center refers to the phases spherical surfaces such as the practical equiphase surface ideal in far field in entire antenna beam space to be fitted,
The quadratic sum of regression criterion is minimum, then the centre of sphere of fit sphere is the average phase center of antenna.Phase center offset is
Refer to the offset at average phase center and antenna reference point.Phase center variation amount refers to the inclined of practical equiphase surface and fit sphere
It moves.The phase center of receiver antenna is neither antenna geometrical center, nor a stable point, but faced upward with incoming signal
The factors such as the form at angle, azimuth and antenna are related.The observed quantity of the antenna of satellite navigation receiver, be with phase center point
For reference point, when staff's work, the geometric center of the installation general default antenna of antenna is its phase center, this is resulted in
Phase center, which is not found accurately, brings phase error.There is no in unique phase in entire beam space for antenna in practice
The heart, only phase keeps relative stability in a certain range of main beam.When therefore causing to receive the signal of different directions, it can introduce
Phase error, phase error result in the deviation of measurement result.Therefore the phase center antenna of high stable is studied, to reduce antenna
The deviation as caused by phase error in the measurement results, has important practical significance.
Authorization Notice No. is that 104868235 B of CN discloses a kind of stacked antenna structure and antenna, the patent solve day
Line cannot be considered in terms of the technical issues of performance and thickness requirement, and there is no the technical problems solved in background technique.
Summary of the invention
The object of the present invention is to provide the ladder ground structures that one kind can improve the antenna phase stability of navigation system, lead to
The loading stepped ground structure on the bad antenna of phase stability is crossed, the phase stability of antenna is greatly improved；Solve navigation system
The low technical problem of antenna phase stability in system.
A kind of ladder ground structure improving antenna phase stability, including radiation patch, dielectric layer, feeding network, ground connection
Plate and ladder, the dielectric layer is formed by multilayer dielectric substrate by screw fixation, and dielectric layer is with being mounted on the ladder
Top, the dielectric layer top are etched with the radiation patch, and lower section etches the earth plate, etching feedback inside the dielectric layer
Electric network.
Based on the above technical solution, the present invention can also be improved as follows:
Further, the medium substrate includes first medium substrate, second medium substrate and third medium substrate, described
Earth plate includes the first earth plate and the second earth plate, and first earth plate is etched below the first medium substrate, described
Second medium substrate is placed in the lower section of the first medium substrate, and the feeding network, institute are etched below second medium substrate
The lower section that third medium substrate is placed in second medium substrate is stated, and etches second earth plate, institute below third medium substrate
It states first medium substrate, second medium substrate and third medium substrate and a shared ground is connect with the ladder by screw.
Further, the dielectric constant of the first medium substrate is 9.8, second medium substrate and third medium substrate
Dielectric constant is 2.5.
Further, the feeding network is the Wilkinson power divider of equal function point, and the output port of feeding network divides
For the first output port and second output terminal mouth, advanced 90 ° of second output terminal mouth phase of the first output port phase.
Further, the isolation resistance R resistance value of the feeding network is 100 ohm, and master port Port input impedance is 50
Ohm, is fed using 50 ohm of coaxial line.
Beneficial effects of the present invention:
1. the present invention provides a kind of ladder ground structures for improving antenna phase stability, by loading stepped ground structure,
Substantially increase the phase stability of navigation antenna；
2. the present invention carries out single layer ground structure to be deformed into ladder ground structure, with this from the ground structure of antenna element
Improve the phase stability of navigation antenna, relative to conventional navigation antenna, aperture area is constant, feed network structures are simple,
The difficulty for greatly reducing Antenna Design can be widely applied in the design application of navigation antenna.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 shows for a kind of structure of the ladder ground structure of improvement antenna phase stability described in the specific embodiment of the invention
It is intended to；
Fig. 2 is a kind of second Jie of the ladder ground structure of improvement antenna phase stability described in the specific embodiment of the invention
The structural schematic diagram of matter substrate；
Fig. 3 is the simulation curve of the phase stability of single layer ground structure, and simulation curve is at B3 frequency point is at azimuth
At 0 °, the variable quantity of phase within the scope of pitch angle ± 60 °.
Fig. 4 be phase stability of the invention simulation curve, simulation curve be at B3 frequency point azimuth be 0 ° when,
The variable quantity of phase within the scope of pitch angle ± 60 °.
Appended drawing reference:
1- radiation patch；2- dielectric layer；3- screw；4- earth plate；5- feeding network；6- ladder；
201- first medium substrate；202- second medium substrate；203- third medium substrate；
The first earth plate of 401-；The second earth plate of 402-；
The first output port of 501-；502- second output terminal mouth；503- master port Port.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation and limit protection model of the invention
It encloses.
It should be noted that unless otherwise indicated, technical term or scientific term used in this application should be this hair
The ordinary meaning that bright one of ordinary skill in the art are understood.
In the description of the present application, it is to be understood that term " center ", "upper", "lower", "vertical", "horizontal",
The orientation or positional relationship of the instructions such as "front", "rear", "top", "bottom" is to be based on the orientation or positional relationship shown in the drawings, and is only
For the convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must have specific side
Position is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply relatively important
Property or implicitly indicate the quantity of indicated technical characteristic.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined；
In this application unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
Embodiment
As shown in Figure 1, a kind of ladder ground structure for improving antenna phase stability provided by the present invention, including radiation patch
Piece 1, dielectric layer 2, feeding network 5, earth plate 4 and ladder 6, it is fixed that the dielectric layer 2 by multilayer dielectric substrate passes through screw 3
It forms, and with being mounted on the ladder 6 top of dielectric layer 2, the radiation patch 1 is etched with above the dielectric layer 2, lower section is carved
The earth plate 4 is lost, etches feeding network 5 inside the dielectric layer 2；The present invention is used to by screw 3 by three layers of medium substrate
It is secured together, and the same ground level of antenna duplexer is guaranteed by screw 3.
Wherein, dielectric layer 2 has three layers, respectively first medium substrate 201, second medium substrate 202 and third medium base
Plate 203, the earth plate 4 include the first earth plate 401 and the second earth plate 402；It is etched below the first medium substrate 201
The lower surface that first earth plate 401, i.e. the first earth plate 401 are in first medium substrate 201, the second medium substrate
202 are placed in the lower section of the first medium substrate 201, and the feeding network 5 is etched below second medium substrate 202, described
Third medium substrate 203 is placed in the lower section of second medium substrate 202, and etches described second below third medium substrate 203 and connect
The lower surface that floor 402, i.e. the second earth plate 402 are in third medium substrate 203, the first medium substrate 201, second are situated between
Matter substrate 202 and third medium substrate 203 pass through screw and connect a shared ground with the ladder.
Wherein, as shown in Fig. 2, the feeding network 5 is the Wilkinson power divider of equal function point, and feeding network 5 is defeated
Exit port is divided into the first output port 501 and second output terminal mouth 502, and 501 phase of the first output port advanced second is defeated
The isolation resistance R resistance value of 502 phase of exit port, 90 ° of feeding networks 5 is 100 ohm, and master port Port503 input impedance is
It 50 ohm, is fed using 50 ohm of coaxial line.
The present invention is by comparing phase within the scope of pitch angle ± 60 ° of single layer ground structure and the navigation antenna of ladder ground structure
Variable quantity can significantly improve the phase stability of antenna to verify ladder ground structure.
The present invention carries out modeling and simulating verifying in B3 frequency range, and the dielectric constant of first medium substrate is 9.8, second medium base
The dielectric constant of plate and third medium substrate is 2.5, within the scope of antenna elevation angle ± 60 ° by emulation discovery single layer ground structure
The variable quantity of phase is 4.77 °；The present invention optimizes single layer earth plate, forms staged earth plate, staged earth plate
Height H and each layer of space D, work as H=4mm, when D=17.5mm, load the antenna of multilayer ground structure in pitch angle ± 60 °
The variable quantity of phase is improved to 1.36 ° in range.
In specification of the invention, numerous specific details are set forth.It is to be appreciated, however, that the embodiment of the present invention can be with
It practices without these specific details.In some instances, well known method, structure and skill is not been shown in detail
Art, so as not to obscure the understanding of this specification.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.
Claims (5)
1. a kind of ladder ground structure for improving antenna phase stability, which is characterized in that including radiation patch, dielectric layer, feed
Network, earth plate and ladder, the dielectric layer is formed by multilayer dielectric substrate by screw fixation, and dielectric layer is mounted on institute
It states above ladder ground, is etched with the radiation patch above the dielectric layer, lower section etches the earth plate, in the dielectric layer
Portion etches feeding network.
2. a kind of ladder ground structure for improving antenna phase stability according to claim 1, which is characterized in that given an account of
Matter layer includes first medium substrate, second medium substrate and third medium substrate, and the earth plate includes the first earth plate and the
Two earth plates, the first medium substrate lower section etch first earth plate, and the second medium substrate is placed in described first
The lower section of medium substrate, and the feeding network is etched below second medium substrate, the third medium substrate is placed in second Jie
The lower section of matter substrate, and second earth plate, the first medium substrate, second medium base are etched below third medium substrate
Plate and third medium substrate pass through screw and connect a shared ground with the ladder.
3. a kind of antenna structure for improving antenna phase stability according to claim 2, which is characterized in that described first
The dielectric constant of medium substrate is 9.8, and the dielectric constant of second medium substrate and third medium substrate is 2.5.
4. a kind of ladder ground structure for improving antenna phase stability according to claim 1, which is characterized in that the feedback
Electric network is the Wilkinson power divider of equal function point, and the output port of feeding network is divided into the first output port and the second output
Port, advanced 90 ° of second output terminal mouth phase of the first output port phase.
5. a kind of ladder ground structure for improving antenna phase stability according to claim 4, which is characterized in that the feedback
The isolation resistance R resistance value of electric network is 100 ohm, and master port Port input impedance is 50 ohm, using 50 ohm of coaxial line
It is fed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811477690.4A CN109387860B (en) | 2018-12-04 | 2018-12-04 | Stepped ground structure for improving phase stability of antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811477690.4A CN109387860B (en) | 2018-12-04 | 2018-12-04 | Stepped ground structure for improving phase stability of antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109387860A true CN109387860A (en) | 2019-02-26 |
| CN109387860B CN109387860B (en) | 2024-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811477690.4A Active CN109387860B (en) | 2018-12-04 | 2018-12-04 | Stepped ground structure for improving phase stability of antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112038761A (en) * | 2020-08-04 | 2020-12-04 | 广州智讯通信***有限公司 | High-gain circularly polarized antenna |
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| CN109387860B (en) | 2024-06-07 |
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