CN109037942A - The measurement type GNSS antenna buried based on medium - Google Patents
The measurement type GNSS antenna buried based on medium Download PDFInfo
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- CN109037942A CN109037942A CN201810921602.9A CN201810921602A CN109037942A CN 109037942 A CN109037942 A CN 109037942A CN 201810921602 A CN201810921602 A CN 201810921602A CN 109037942 A CN109037942 A CN 109037942A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a kind of measurement type GNSS antennas buried based on medium, including first medium layer, several feeding points, second dielectric layer.First medium layer includes the upper and lower surfaces being oppositely arranged, and upper surface is equipped with the first radiating element and several tuned cells, and several tuned cells are alternatively arranged setting, and lower surface is equipped with the second radiating element；The upper surface of several feeding points from first medium layer extends to the lower surface of first medium layer, for realizing being of coupled connections for the first radiating element and the second radiating element；Second dielectric layer is connect with first medium layer, and second dielectric layer is for burying the first radiating element, tuned cell and/or the second radiating element.GNSS antenna provided by the invention can effectively reduce the size of antenna, reduce the section of antenna, and improve the concealment and fastness of antenna, and effectively improve its anti-interference ability, while protecting antenna, the service life of extension antenna.
Description
Technical field
The present invention relates to satellite navigation aerial field more particularly to a kind of measurement type GNSS antennas buried based on medium.
Background technique
GNSS (Global Navigation Satellite System) refers to Global Navigation Satellite System comprising beauty
The global positioning system (Global Positioning System, GPS) of state, Russian GLONASS (Global
Navigation Satellite System, Glonass), Europe galileo satellite navigation system (Galileo
Satellite Navigation System, Galileo) and Chinese Beidou satellite navigation system.When GNSS is capable of providing
Between/space reference and all real-time dynamic informations relevant to position.And GNSS antenna is the antenna for receiving satellite-signal, GNSS
Positioning accuracy depend primarily on the precision of antenna, be directed to field of antenna always for the Research on Accuracy of GNSS antenna
Person and enterprise pay much attention to and continue the direction of input research.
Currently, the research for GNSS antenna mainly includes following direction: 1. how to improve the wide angle axis ratio of antenna
And gain bandwidth, to meet the requirement of four big navigation system simultaneously；2. how to design antenna so that antenna have section it is low, weight
Gently, the features such as size is small, to be suitable for different products；3. how to enable one very wide angular range of antenna is interior to receive
Signal, and it is able to maintain stable phase center, to realize more accurate positioning.
Based on the studies above direction, very more GNSS antennas has been emerged in large numbers on the market, currently, GNSS antenna on the market is big
The mode for mostly using double dielectric stack structures, mainly by the way that metal layer is respectively set on first medium layer and second dielectric layer,
Then the metal layer of first medium layer and the metal layer of second dielectric layer are connected.Although the mode of this double dielectric stacks can be with
Wider gain bandwidth is obtained, still, the antenna section height under this structure design is higher, and weight is laid particular stress on, the size of antenna
It is larger higher so as to cause design cost.
Summary of the invention
The embodiment of the invention discloses a kind of measurement type GNSS antennas buried based on medium, can effectively reduce antenna
Size reduces the section of antenna, and improves the concealment and fastness of antenna, and effectively improve its anti-interference ability.
The embodiment of the invention discloses a kind of measurement type GNSS antenna buried based on medium, the antenna includes first Jie
Matter layer, several feeding points, second dielectric layer.The first medium layer includes the upper and lower surfaces being oppositely arranged, it is described on
Surface is equipped with the first radiating element and several tuned cells, and several tuned cells are alternatively arranged setting, and the lower surface is set
There is the second radiating element；The upper surface of several feeding points from the first medium layer extends under the first medium layer
Surface, for realizing being of coupled connections for first radiating element and second radiating element；The second dielectric layer and institute
The connection of first medium layer is stated, the second dielectric layer is for burying first radiating element, the tuned cell and/or described
Second radiating element.
As an alternative embodiment, in embodiments of the present invention, the second dielectric layer is single-layer medium, described
Second dielectric layer is connected to the lower surface of the first medium layer, for burying second radiating element；Or
The second dielectric layer is single-layer medium, and the second dielectric layer is connected to the upper table of the first medium layer
Face, for burying first radiating element and the tuned cell；Or
The second dielectric layer is two-layered medium, including first layer second dielectric layer and second layer second dielectric layer are described
First layer second dielectric layer is connected to the upper surface of the first medium layer, for burying first radiating element and institute
Tuned cell is stated, the second layer second dielectric layer is connected to the lower surface of the first medium layer, for embedded described
Second radiating element.
As an alternative embodiment, in embodiments of the present invention, first radiating element includes first round
Radiation patch and four the first rectangle minor matters, the first circular radiation patch printing are formed in the described of the first medium layer
Upper surface, and the center of the first circular radiation patch is overlapped with the center of the upper surface, four the first rectangle branches
Section circularizes arrangement along the center of the first circular radiation patch, and each first rectangle minor matters are round with described first
Shape radiation patch is fixedly connected.
As an alternative embodiment, in embodiments of the present invention, several tuned cells are along the upper surface
Center circularize and be arranged, and the tuned cell is set to the first circular radiation patch of first radiating element
Outside, the tuned cell includes arc-shaped patch and the ellipse arc patch that connect with the arc-shaped patch.
As an alternative embodiment, in embodiments of the present invention, second radiating element includes second round
Radiation patch and four the second rectangle minor matters, the second circular radiation patch printing are formed in the lower surface, and described the
The center of two circular radiation patches is overlapped with the center of the lower surface, and the second circular radiation patch is on the lower surface
Projected area be greater than projected area of the first circular radiation patch on the lower surface；
Four the second rectangle minor matters circularize arrangement along the center of the second circular radiation patch, and each described
Second rectangle minor matters are fixedly connected with the second circular radiation patch.
As an alternative embodiment, in embodiments of the present invention, several feeding points are along the upper surface
Center, which circularizes, to be arranged, and forms phase difference between the feeding point of adjacent two.
As an alternative embodiment, in embodiments of the present invention, the feeding point is four, and the upper surface is opened
If there are four the round hole for being through to the lower surface, each feeding point is respectively arranged in the corresponding round hole.
As an alternative embodiment, in embodiments of the present invention, the upper surface be also provided be through to it is described
The center of second through-hole of lower surface and several short circuit holes, second through-hole is overlapped with the center of the upper surface, Ruo Gansuo
It states short circuit hole to circularize arrangement along the center of second through-hole and the periphery of second through-hole is arranged in, the short circuit hole is
Plated through-hole, first radiating element and second radiating element pass through second through-hole and several short circuit holes
Connection.
As an alternative embodiment, in embodiments of the present invention, the side of the second dielectric layer is equipped with and institute
Second medium layer height is stated to maintain an equal level and ring-shaped distributed several chokes teeth.
As an alternative embodiment, in embodiments of the present invention, the second dielectric layer is situated between far from described first
The surface of matter layer with the pcb board of GNSS antenna for connecting, and the pcb board is equipped with gold away from the one side of the second dielectric layer
Belong to screening cover.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the positive structure schematic of antenna provided in an embodiment of the present invention.
Fig. 2 is the side structure schematic diagram of antenna provided in an embodiment of the present invention.
Fig. 3 is the structure schematic diagram of antenna provided in an embodiment of the present invention.
Fig. 4 is the three-dimensional structure diagram of antenna provided in an embodiment of the present invention.
Fig. 5 is the structural schematic diagram of the upper surface of first medium layer provided in an embodiment of the present invention.
Fig. 6 is the structural schematic diagram of the lower surface of first medium layer provided in an embodiment of the present invention.
Fig. 7 is the structural schematic diagram of second dielectric layer provided in an embodiment of the present invention.
Fig. 8 is the S11 curve graph of antenna provided in an embodiment of the present invention.
Fig. 9 is passive directional diagram of the antenna provided in an embodiment of the present invention in 1.164GHz, 1.227GHz, 1.278GHz.
Figure 10 is antenna provided in an embodiment of the present invention in 1.525GHz, 1.575GHz, the passive directional diagram of 1.612GHz.
Figure 11 is antenna provided in an embodiment of the present invention in 1.227GHz, and the axis of four-point feed and 8 points of feeds compares curve
Comparison diagram.
Figure 12 is antenna provided in an embodiment of the present invention in 1.575GHz, and the axis of four-point feed and 8 points of feeds compares curve
Comparison diagram.
Figure 13 is antenna provided in an embodiment of the present invention in 1.227GHz, has added chokes tooth and has not added the axis ratio of chokes tooth
Line curve comparison figure.
Figure 14 is antenna provided in an embodiment of the present invention in 1.575GHz, has added chokes tooth and has not added the axis ratio of chokes tooth
Line curve comparison figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
It should be noted that the term " includes " of the embodiment of the present invention and " having " and their any deformation, it is intended that
Be to cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units not
Those of be necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for these processes, side
The intrinsic other step or units of method, product or equipment.
The embodiment of the invention discloses a kind of measurement type GNSS antennas buried based on medium, can effectively reduce antenna
Size reduces the section of antenna, and improves the concealment and fastness of antenna, and effectively improve its anti-interference ability.
Below with reference to attached drawing to a kind of measurement type GNSS antenna buried based on medium provided in an embodiment of the present invention into
Row detailed description.
Also referring to Fig. 1 to Fig. 4, which includes first medium layer 1, second dielectric layer 2 and several feeding points 3.
First medium layer 1 includes the upper and lower surfaces being oppositely arranged, and upper surface is equipped with the first radiating element 11 and several tunings are single
Member 12, several tuned cells are alternatively arranged setting, and lower surface is equipped with the second radiating element 13.Several feeding points 3 are from first medium
The upper surface of layer 1 extends to the lower surface of first medium layer 1, for realizing the first radiating element 11 and the second radiating element 13
It is of coupled connections.Second dielectric layer 2 is connect with first medium layer 1, and second dielectric layer 2 is for burying the first radiating element 11, tuning
Unit 12 and/or the second radiating element 13.
In the present embodiment, for the miniaturization for realizing antenna, the concealment for enhancing antenna, the performance for optimizing antenna, together
When play protection antenna, extension antenna service life purpose, the embodiment of the present invention using second dielectric layer 2 realize to first
The first radiating element 11, tuned cell 12 and the second radiating element 13 on dielectric layer 1 bury.
Specifically, as an alternative embodiment, second dielectric layer 2 can be single-layer medium, second dielectric layer 2 is connected
In the lower surface of first medium layer 1, for burying the second radiating element 13.Then at this point, second dielectric layer 2 is only to first medium layer
Second radiating element 13 of 1 lower surface is buried, so as to reduce the size of antenna to a certain extent.
As another optional embodiment, second dielectric layer 2 is single-layer medium, and second dielectric layer 2 is connected to first
The upper surface of dielectric layer 1, for burying the first radiating element 11 and tuned cell 12.Then at this point, second dielectric layer 2 is buried simultaneously
The first radiating element 11 and tuned cell 12 of 1 upper surface of first medium layer, and the second radiating element 13 is exposed mode.
As another optional embodiment, second dielectric layer 2 is two-layered medium, including first layer second dielectric layer and
Second layer second dielectric layer, first layer second dielectric layer are connected to the upper surface of first medium layer 1, for burying the first radiation list
Member 11 and tuned cell 12, second layer second dielectric layer are connected to the lower surface of first medium layer 1, for burying the second radiation list
Member 13.Then at this point, whether the first radiating element 11, tuned cell 12 or the first medium layer of 1 upper surface of first medium layer
Second radiating element 13 of 1 lower surface can all be buried in second dielectric layer 2, at this time, it can be achieved that the first radiation on antenna
Unit 11, the second radiating element 13 and tuned cell 12 obtain most comprehensively protecting.
Preferably, the embodiment of the present invention is single-layer medium using first medium layer 1 and second dielectric layer 2, and second is situated between
Matter layer 2 is connected to the lower surface of first medium layer 1, is illustrated for the second radiating element 13 for burying.
It should learn, under normal circumstances, the material of low-k can be used in the medium in the present invention, can also adopt
With the material of high dielectric constant.In design in view of the needs of cost and design can neatly select the material of medium.Tool
Body, since second dielectric layer 2 is to bury medium, dielectric constant, the thickness of the material of second dielectric layer 2, loss angle
Tangent all has a certain impact to the performance of antenna.Preferably, it is contemplated that the gain design index of antenna, second dielectric layer 2 are adopted
Be designed with the smaller material of dielectric loss angle tangent, the dielectric constant of second dielectric layer 2 according to design cost and
The actual needs of Antenna Design index can flexibly select other dielectric constants to be designed.And for first medium layer 1 and
Speech, thickness need to usually need to comprehensively consider according to the bandwidth of antenna, design cost and actual design.
Preferably, in the present embodiment, the first medium layer 1 and second dielectric layer 2 may be selected by low-k, low
The high frequency material of loss is constituted.For example, first medium layer 1 and second dielectric layer 2 can be situated between by air dielectric or ceramics
Texture at.Preferably, first medium layer 1 and second dielectric layer 2 use dielectric constant for 2.65 plate FP0.
The first medium layer 1 and second dielectric layer 2 are constituted using the material of low-k, can make GNSS antenna
Radiation conductance increases, and Q value reduces, to be conducive to extend the bandwidth of GNSS antenna.
Further, the first medium layer 1 and cross sectional shape of second dielectric layer 2 is rounded or polygon is (for example, four sides
Shape, pentagon and hexagon etc.).And preferably, first medium layer 1 and the cross sectional shape of second dielectric layer 2 are circle, simultaneously
The area of section of second dielectric layer 2 is greater than or equal to the area of section of first medium layer 1, to realize second dielectric layer 2 to first
The first radiating element 11, tuned cell 12 and/or the second radiating element 13 on dielectric layer 1 it is embedded.
In the present embodiment, the first radiating element 11 is that high frequency radiating element (is all made of height to the first radiating element below
Radio-frequency radiation unit illustrates), second radiating element 13 is that low frequency radiating element (is all made of low frequency spoke to the second radiating element below
Unit is penetrated to illustrate).
Wherein, in the present embodiment, the total thickness of inventive antenna is about 10mm, and radius is about 45mm, in such case
Under, when the low-frequency gain of antenna is in 5dBi or more, 13 frequency range of low frequency radiating element of this programme be about 1.164GHz~
1.278GHz, the high-frequency gain of antenna in 5.5dBi or more, the frequency range of high frequency radiating element 11 be about 1.525GHz~
1.612GHz。
Generally, if changing the thickness of inventive antenna, size, or more low-loss material, antenna gain model are used
Enclosing can change, and the frequency range of high frequency radiating element 11 and low frequency radiating element 13 can also change therewith.
In conjunction with shown in Fig. 1, Fig. 5, in the present embodiment, the cross sectional shape of first medium layer 1 is circle, high frequency radiating element
11 include the first circular radiation patch 111 and four the first rectangle minor matters 112, and the printing of the first circular radiation patch 111 is formed in
The upper surface of first medium layer 1, and the center of the first circular radiation patch 111 is overlapped with the center of upper surface, four the first squares
Shape minor matters 112 circularize arrangement along the center of the first circular radiation patch 111, and every one first rectangle minor matters 112 are with first
Circular radiation patch 111 is fixedly connected.Specifically, the diameter of the first circular radiation patch 112 is less than the straight of first medium layer 1
Diameter, four the first rectangle minor matters 112 are edge and the first circular radiation patch 111 when connecting on the first circular radiation patch 111
Junction it is outwardly extending, and the outwardly extending length and width of the first rectangle minor matters 112 is adjustable, to can realize pair
The adjusting of the resonance frequency of high frequency radiating element 11.It should be noted that being, the outwardly extending length of the first rectangle minor matters 112 cannot surpass
Cross first medium layer 1.
Further, the center of upper surface of several tuned cells 12 along first medium layer 1, which circularizes, is arranged, and tunes
Unit 12 is set to the outside of the first circular radiation patch 111 of high frequency radiating element 11, and tuned cell 12 includes arc-shaped patch
121 and the ellipse arc patch 122 that is connect with arc-shaped patch 121.Specifically, tuned cell 12 is four, and four tunings are single
Member 12 is circularized along the center of the upper surface of first medium layer 11 to be arranged, and each tuned cell 12 is located at adjacent two
Between a first rectangle minor matters 112.
The tuned cell 12 formed is combined using arc-shaped patch 121 and ellipse arc patch 122, can be conducive to optimize day
The impedance matching of line, while the circular polarization characteristics at the low elevation angle of antenna can be optimized to a certain extent, so that antenna has wide angle axis
Ratio characteristic.In addition, the tuned cell 12 that arc-shaped patch 121 and ellipse arc patch 122 are formed, can improve to a certain extent
The low elevation gain value of antenna, so as to improve tracking and the satellite searching ability at the low elevation angle of system.And the tuning using arc
Unit is equivalent to extension current path, also can achieve the purpose that antenna realizes miniaturization.
In addition, forming tuned cell 12 since the present invention is combined using arc-shaped patch 121 and ellipse arc patch 122
Mode can effectively reduce the section of antenna, so that two-layered medium of the present invention in spite of first medium layer 1 and second dielectric layer 2
Mode, but still have similar to single-dielectric-layer section height.
Further, in order to realize the connection of first medium layer 1 and second dielectric layer 2, in each tuned cell 12
On be equipped with fixation hole 123, the fixation hole 123 be set to tuned cell 12 arc-shaped patch 121 and ellipse arc patch 122 it
Between, fixation hole 123 runs through first medium layer 1, second dielectric layer 2 and the pcb board 4 for being connected to second dielectric layer, then passes through
The capillary fixation hole 123 (not shown) that passes through by first medium layer 1, second dielectric layer 2 and pcb board 4, realize first medium layer 1,
Second dielectric layer 2 is fixedly connected with pcb board 4.Specifically, fixation hole 123 is circular hole, and is interfered in order to prevent, fixation hole 123
For non-metallic material.
First medium layer 1, second dielectric layer 2 and pcb board 4 are realized using fixation hole 123 is opened up on tuned cell 12
The mode being fixedly connected can not only realize the fixation to antenna, while the reliability and fastness of antenna also can be improved.
Referring to figure 1 and figure 5, in the present embodiment, low frequency radiating element 13 includes 131 He of the second circular radiation patch
Four the second rectangle minor matters 132, the second circular radiation patch 131 print the lower surface for being formed in first medium layer 1, and the second circle
The center of shape radiation patch 131 is overlapped with the center of lower surface, the projected area of the second circular radiation patch 131 on the lower surface
Greater than the projected area of the first circular radiation patch 111 on the lower surface；Four the second rectangle minor matters 132 are along the second circular radiation
The center of patch 131 circularizes arrangement, and every one second rectangle minor matters 132 are fixedly connected with the second circular radiation patch 131.
It is understood that in other embodiments, non-circular radiation patch can also be used in low frequency radiating element 13, but select oval
The polygons radiation patch such as shape, rectangular or hexagon.
Referring to Fig. 1, Fig. 3 and Fig. 5, in the present embodiment, upper table of several feeding points 3 along first medium layer 1
The center in face, which circularizes, to be arranged, and forms phase difference between two adjacent feeding points 3.Preferably, feeding point 3 be four, four
The center of upper surface of a feeding point 3 along first medium layer 1, which circularizes, to be arranged, the upper table of feeding point 3 to first medium layer 1
The distance at the center in face is adjustable.And the phase of four feeding points 3 is followed successively by 0 °, 90 °, 180 °, 270 °, then adjacent two
Phase difference between feeding point is 90 °.
In conjunction with shown in Figure 11 and Figure 12, antenna is in 1.227GHz, using the technology of four-point feed, axis ratio and using eight
The axis of point feed is than differing and little, it follows that using four-point feed of the invention, and feeding point phase successively differs 90 °
The technology for realizing the coupling of high frequency radiating element 11 and low frequency radiating element 13, using the feed side of feedback high-frequency coupling low frequency
Formula, effectively expands the bandwidth of antenna, while obtaining higher gain.Meanwhile using four-point feed technology, tradition can be effectively solved
Eight feed points process relative complex, the higher problem of cost of manufacture.This, which is mainly reflected in four-point feed only, need to use three 3dB electricity
Bridge can complete the combining of low-and high-frequency, and eight feed points will could complete the combining of low-and high-frequency using six 3dB electric bridges.Therefore,
Using four-point feed technology of the invention, the complexity and cost manufactured are not only reduced, and is the layout of circuit board
Certain space is provided, the layout of circuit is conducive to.In addition, four-point feed technology through the invention, high and low frequency radiation
Patch can be conducive to the control of debugging and volume production product yield with independent control, so that it is more excellent to reach performance, production process
Simply, the purpose of product miniaturization.
Further, because inventive antenna is by the way of presenting high-frequency coupling low frequency, in order to realize that energy passes through coupling
Mode be coupled to the purpose of low frequency radiating element 13 from high frequency radiating element 11, be provided with round hole 31.First medium layer 1
Upper surface is opened up there are four the round hole 31 for being through to its lower surface, each feeding point 3 is respectively arranged on corresponding round hole 31
It is interior.Specifically, round hole 31 is nonmetallic hole, and the center of the center of the round hole 31 to the upper surface of first medium layer 1
Distance can be adjusted according to the bandwidth and gain of antenna.
In the present embodiment, the upper surface of first medium layer 1 be also provided with the second through-hole 14 for being through to its lower surface and
The center of several short circuit holes 15, the second through-hole 14 is overlapped with the center of the upper surface of first medium layer 1, and several short circuit holes 15 are along
The center of two through-holes 14 circularizes arrangement and the periphery of the second through-hole 14 is arranged in, and short circuit hole 15 is plated through-hole, high frequency radiation
Unit 11 and 13 low frequency radiating elements pass through the second through-hole 14 and several short circuit holes 15 connect.Specifically, the second through-hole 14 is
Plated-through hole or non-metallic through-hole connect the upper and lower of first medium layer 1 using the second through-hole 14 and several short circuit holes 15
The low-and high-frequency radiating element on surface is conducive to optimize impedance matching.In addition, the second through-hole 14 can also support bluetooth, wifi, electricity
The needs of the Expanding design of platform antenna, the second through-hole 14 are positioned only in first medium layer 1.
Further, short circuit hole 15 is metallization VIA, and preferably eight, the size of short circuit hole 15 is typically greater than or equal to
The size of feeding point 3.The setting of short circuit hole 15 be on the one hand to offset metal probe (not shown) it is too long and introduce parasitism
Inductance is conducive to resonance；On the other hand it is the quantity in order to reduce metal probe, reduces product subsequent production welding quantity.
It should learn, short circuit hole 15 only penetrates through first medium layer 1, for connecting high frequency radiating element 11 and low frequency radiating element
13, this is also conducive to the layout of subsequent active circuit, advantageously reduces the design cost of antenna, while also solving since metal is visited
Needle excessively cause to weld it is inconsistent, thus the problem of influencing properties of product consistency.It is understood that in other embodiments
In, the number of short circuit hole 15 can be also adjusted according to bandwidth, the gain etc. of antenna.
It is further noted that short circuit hole 15 should be located near feeding point 3, specially positioned at the interior of feeding point 3
Side, that is, the linear distance at the center at the center of short circuit hole 15 to the upper surface of first medium layer 1 should be less than the center of feeding point 3
To the linear distance at the center of the upper surface of first medium layer 1.This is because short circuit hole 15 is for feeding point 3 under this position
Inductance characteristic eradicating efficacy it is preferable, and the bandwidth and gain of antenna two sides can be taken into account simultaneously.
Also referring to Fig. 1, Fig. 6 and Fig. 7, in the present embodiment, it is equipped with and the same center of the second through-hole in second dielectric layer 2
And isodiametric non-metallic through-hole 22.
Further, the side of second dielectric layer 2 is equipped with highly fair and ring-shaped distributed several with second dielectric layer 2
Chokes tooth 21.Specifically, which is equally distributed on the side of second dielectric layer 2, and several chokes teeth 21 with
Several tuned cells 12 positioned at 1 upper surface of first medium layer cooperatively form tuning, may make the miniaturization effect of antenna
It is more obvious.
In addition, the inhibitory effect of the multipath effect of antenna is more obvious using the setting of chokes tooth 21, and system is anti-
Interference performance is more excellent, can also extend the current path of outer chip surface, realizes the purpose of low-frequency antenna miniaturization.Therefore, it adopts
With the design of chokes tooth 21, and combine above-mentioned tuned cell 12 setting using arc-shaped patch 121 and ellipse arc patch 122
Meter, can be effectively reduced the section of antenna, is more conducive to the Miniaturization Design of antenna.
Referring to Fig. 1 and Fig. 2, in the present embodiment, surface of the second dielectric layer 2 far from the first medium layer 1
It is connect for the pcb board 4 with GNSS antenna, and pcb board 4 is equipped with metallic shield lid 5 away from the one side of second dielectric layer, thus
Reduce the interference caused by antenna of other signals to a certain extent.
Specifically, which can preferably utilize the space of pcb board 4, centainly using the processing technology of double-side copper-applying
The design cost of antenna is reduced in degree, in addition, also solving traditional stack combinations antenna using the technique of double-side copper-applying and setting
The problems such as section brought by counting is high, weight weight.
Referring to Fig. 8, Fig. 8 is the S11 curve graph of antenna provided in an embodiment of the present invention, as seen from the figure, using the present invention
Dual frequency characteristics are presented in the GNSS antenna of embodiment.Wherein the bandwidth of low frequency is more slightly wider than the bandwidth of high frequency, the covered bandwidth of low frequency
Range is 1.164GHz-1.278GHz, the bandwidth range of high frequency covering is 1.525GHz-1.612GHz.
Referring to Fig. 9, wherein, Fig. 9 (a) is passive directional diagram of the antenna provided in an embodiment of the present invention in 1.164GHz,
Fig. 9 (b) is passive directional diagram of the antenna provided in an embodiment of the present invention in 1.227GHz, and Fig. 9 (c) is that the embodiment of the present invention provides
Antenna 1.278GHz passive directional diagram.In Fig. 9 (a), Fig. 9 (b), Fig. 9 (c), curve S1 indicates main polarization directional diagram,
Curve S2 indicates Cross polarization pattern.By Fig. 9 (b) as it can be seen that the passive gain of antenna is up to 7.09dBi；By Fig. 9 (a) and Fig. 9
(c) as it can be seen that in the beamwidth of antenna gain of two sides can reach 5dBi or more.
Referring to Fig. 10, Figure 10 (a) is passive directional diagram of the antenna provided in an embodiment of the present invention in 1.525GHz, Figure 10
It (b) is passive directional diagram of the antenna provided in an embodiment of the present invention in 1.575GHz, Figure 10 (c) is provided in an embodiment of the present invention
Passive directional diagram of the antenna in 1.612GHz.In Figure 10 (a), Figure 10 (b), Figure 10 (c), curve S1 indicates main polarization direction
Figure, curve S2 indicate Cross polarization pattern.By Figure 10 (b) as it can be seen that the passive gain of antenna is up to 7.8dBi, and by Figure 10
(a) and Figure 10 (c) is as it can be seen that the gain of antenna two sides reaches 5.5dBi or more.
Therefore, by Fig. 9 and Figure 10 it is found that antenna provided in an embodiment of the present invention can cover GPS navigation system, BDS navigation
System, Galileo navigation system, GLONASS navigation system and L band.
Figure 11 is please referred to, Figure 11 is antenna provided in an embodiment of the present invention in 1.227GHz, four-point feed and 8 points of feedbacks
The axis of electricity compares curve comparison figure.Wherein, solid line indicates that four-point feed, dotted line indicate 8 points of feeds, as seen from Figure 11, presents at 4 points
In the case where electricity, the day apical axis ratio of antenna is close to 0dB, and axis is than the angle less than 3dB more than positive and negative 100 °.
Figure 12 is please referred to, Figure 12 is antenna provided in an embodiment of the present invention in 1.575GHz, four-point feed and 8 points of feedbacks
The axis of electricity compares curve comparison figure.Wherein, solid line indicates that four-point feed, dotted line indicate 8 points of feeds, as seen from Figure 12, presents at 4 points
When electric, the day apical axis ratio of antenna is close to 0dB, and axis is than the angle less than 3dB more than positive and negative 75 °.
By Figure 11 and Figure 12 it is found that comparison antenna is in four-point feed and 8 points two kinds of feed, inventive antenna exists
There is preferable entelechy characteristic in the case of four-point feed, there is preferable wide angle axis ratio characteristic, preferably low elevation angle circular polarisation is special
Property, to improve the satellite searching ability of low elevation angle satellite and search star quality.
Please refer to Figure 13, Figure 13 is antenna provided in an embodiment of the present invention in 1.227GHz, added chokes tooth 21 with not
Add the axis of chokes tooth 21 than line curve comparison figure.Wherein, solid line indicates to increase chokes tooth, and dotted line indicates not add chokes tooth, by scheming
After 13 it is found that inventive antenna added chokes tooth, the axis ratio at the low elevation angle is closer to 0dB.
Please refer to Figure 14, Figure 14 is antenna provided in an embodiment of the present invention in 1.575GHz, added chokes tooth 21 with not
Add the axis of chokes tooth 21 than line curve comparison figure.In figure, solid line indicates to increase chokes tooth, and dotted line indicates not add chokes tooth, by scheming
14 it is found that added the axis at the low elevation angle of the antenna of chokes tooth 21 than not plus the axis at the low elevation angle of antenna of chokes tooth 21 is than small.
By Figure 13 and Figure 14 it is found that after antenna added chokes tooth, the axis ratio at the low elevation angle can be effectively widened, improves antenna
Performance.
Detailed Jie has been carried out to a kind of measurement type GNSS antenna buried based on medium disclosed by the embodiments of the present invention above
It continues, used herein a specific example illustrates the principle and implementation of the invention, and the explanation of above embodiments is only
It is to be used to help to understand a kind of measurement type GNSS antenna buried based on medium of the invention and its core concept；Meanwhile for
Those of ordinary skill in the art have change according to the thought of the present invention in specific embodiments and applications
Place, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of measurement type GNSS antenna buried based on medium, which is characterized in that including
First medium layer, the first medium layer include the upper and lower surfaces being oppositely arranged, and the upper surface is equipped with first
Radiating element and several tuned cells, several tuned cells are alternatively arranged setting, and it is single that the lower surface is equipped with the second radiation
Member；
Several feeding points, the upper surface of several feeding points from the first medium layer extend under the first medium layer
Surface, for realizing being of coupled connections for first radiating element and second radiating element；And
Second dielectric layer, the second dielectric layer are connect with the first medium layer, and the second dielectric layer is for embedded described
First radiating element, the tuned cell and/or second radiating element.
2. a kind of measurement type GNSS antenna buried based on medium according to claim 1, which is characterized in that described second
Dielectric layer is single-layer medium, and the second dielectric layer is connected to the lower surface of the first medium layer, for embedded described
Second radiating element；Or
The second dielectric layer is single-layer medium, and the second dielectric layer is connected to the upper surface of the first medium layer,
For burying first radiating element and the tuned cell；Or
The second dielectric layer is two-layered medium, including first layer second dielectric layer and second layer second dielectric layer, described first
Layer second dielectric layer is connected to the upper surface of the first medium layer, for burying first radiating element and the tune
Humorous unit, the second layer second dielectric layer is connected to the lower surface of the first medium layer, for burying described second
Radiating element.
3. a kind of measurement type GNSS antenna buried based on medium according to claim 1, which is characterized in that described first
Radiating element includes the first circular radiation patch and four the first rectangle minor matters, and the first circular radiation patch printing is formed in
The upper surface, and the center of the first circular radiation patch is overlapped with the center of the upper surface, four first squares
Shape minor matters circularize arrangement along the center of the first circular radiation patch, and each first rectangle minor matters are with described
One circular radiation patch is fixedly connected.
4. a kind of measurement type GNSS antenna buried based on medium according to claim 3, which is characterized in that several described
Tuned cell is circularized along the center of the upper surface and is arranged, and the tuned cell is set to first radiating element
The outside of the first circular radiation patch, the tuned cell include arc-shaped patch and connect with the arc-shaped patch
Ellipse arc patch.
5. a kind of measurement type GNSS antenna buried based on medium according to claim 3 or 4, which is characterized in that described
Second radiating element includes the second circular radiation patch and four the second rectangle minor matters, and the second circular radiation patch prints shape
Lower surface described in Cheng Yu, and the center of the second circular radiation patch is overlapped with the center of the lower surface, second circle
Shape radiation patch is greater than throwing of the first circular radiation patch on the lower surface in the projected area on the lower surface
Shadow area；
Four the second rectangle minor matters circularize arrangement, and each described second along the center of the second circular radiation patch
Rectangle minor matters are fixedly connected with the second circular radiation patch.
6. a kind of measurement type GNSS antenna buried based on medium according to claim 1 or 2, which is characterized in that several
The feeding point is circularized along the center of the upper surface and is arranged, and forms phase difference between the feeding point of adjacent two.
7. a kind of measurement type GNSS antenna buried based on medium according to claim 6, which is characterized in that the feed
Point is four, and the upper surface is opened up there are four being through to the round hole of the lower surface, and each feeding point is respectively arranged on pair
In the round hole answered.
8. a kind of measurement type GNSS antenna buried based on medium according to claim 1, which is characterized in that the upper table
Face is also provided with the second through-hole for being through to the lower surface and several short circuit holes, the center of second through-hole and the upper table
The center in face is overlapped, and several short circuit holes circularize arrangement along the center of second through-hole and are arranged in second through-hole
Periphery, the short circuit hole be plated through-hole, first radiating element and second radiating element pass through described second
Through-hole and several short circuit hole connections.
9. a kind of measurement type GNSS antenna buried based on medium according to claim 1, which is characterized in that described second
The side of dielectric layer is equipped with fair and ring-shaped distributed several chokes teeth with the second medium layer height.
10. a kind of measurement type GNSS antenna buried based on medium according to claim 1, which is characterized in that described
Second medium layer is used to connect with the pcb board of GNSS antenna far from the surface of the first medium layer, and the pcb board is away from described
The one side of second dielectric layer is equipped with metallic shield lid.
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