CN207098057U - Antenna structure and terminal - Google Patents
Antenna structure and terminal Download PDFInfo
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- CN207098057U CN207098057U CN201721116795.8U CN201721116795U CN207098057U CN 207098057 U CN207098057 U CN 207098057U CN 201721116795 U CN201721116795 U CN 201721116795U CN 207098057 U CN207098057 U CN 207098057U
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Abstract
The utility model is applied to antenna technical field, there is provided antenna structure and terminal.The antenna structure includes：Medium substrate；Two pairs of crossed dipoles, it is respectively printed at the both sides of the medium substrate；Two pairs of parasitic antennas, it is respectively printed at the both sides of the medium substrate；Two arc connectors, the both sides of the medium substrate are respectively printed at, are connected respectively with each dipole arm of each pair crossed dipoles；Feed element, it is connected respectively with a dipole arm in each pair crossed dipoles.Above-mentioned antenna structure and terminal, the size by changing all parts can cover multiple bandwidth frequency ranges, realize multiple navigation band operations.
Description
Technical field
The utility model belongs to antenna technical field, more particularly to antenna structure and terminal.
Background technology
Circular polarized antenna is a kind of antenna that can produce circular polarisation electromagnetic wave, is widely used in satellite communication and navigation
In the application such as system.GLONASS (GNSS) makes remarkable progress in the past few decades, and provides extensively
Positioning, navigation and informational function and activity.For all these applications, GNSS receiver need from it is relatively simple, towards
The handheld device of consumer, to the airborne and ship equipment of high-precision.Except perfect GPS（Global Positioning
System, global positioning system）, also some other similar systems are not yet developed or realized completely, but will turn into GPS quickly
Chief competitor.They are the Galileo in Europe, the GLONASS of Russia（GLONASS satellite navigation）With the north of China
Struggle against (compass).They all resist the Faraday rotation effect in ionosphere using circular polarized antenna.In order to avoid interference, it is
GNSS use is assigned with extra frequency band.
GPS frequency range is L1:1575.42 MHz, L2:1227.6 MHz, L3:1381.05 MHz, L4:1379.913
MHz, L5:1176.45 GHz.For civilian single band GPS generally in L1 band operations, while double-frequency GPS receives
Device works in L1 and L2, and is used by the military.L3-L5 bands are used for specific use, such as nuclear detonation detection, additional ionosphere corrections and
Civil safety life signal receives.
Have the research much on GNSS antenna, but most of is all single tape (L1) operation, some be used for biobelt (L1 and
L2) operate.Most of existing business small L1/L2/GPS antennas have 10 gigahertz bandwidths of relative narrowness, are not enough to support
Bandwidth needed for advanced GPS encoding schemes.It is increasing to the demand of multiband or Broadband circularly polarized antenna, not only to cover complete
The frequency band of ball alignment system, also to cover Galileo frequency band, GLONASS frequency band and Big Dipper frequency band.
Utility model content
In view of this, the utility model embodiment provides antenna structure and terminal, to solve circular polarisation in the prior art
The problem of antenna covering frequency range is less, goes for all GNSS systems, including GPS, the Big Dipper, Galileo and GLONASS, has
Used beneficial to the army and the people.
The first aspect of the utility model embodiment, there is provided a kind of antenna structure, including：
Medium substrate；
Two pairs of crossed dipoles, it is respectively printed at the both sides of the medium substrate；
Two pairs of parasitic antennas, it is respectively printed at the both sides of the medium substrate；
Two arc connectors, the both sides of the medium substrate are respectively printed at, it is each with each pair crossed dipoles respectively
Individual dipole arm connection；
Feed element, it is connected respectively with a dipole arm in each pair crossed dipoles.
Preferably, each pair crossed dipoles includes two shape identical dipole arms, and two pairs of crossed dipoles
Four dipole arm shape all sames, are oval ring-type.
Preferably, the major axis of the vesica piscis is L1, short axle H1, width W1.
Preferably, each arc connector is that two dipole arms in each pair crossed dipoles produce 90 ° of phases
Delay, each arc connector is arc ring, and the radius of each arc ring is R1, thickness W3.
Preferably, each pair parasitic antenna includes two arc rings, is separately positioned at two ends angle of the medium substrate.
Preferably, the length of the arc ring is L2, is highly H4, thickness W6.
Preferably, the material of two pairs of crossed dipoles is printed circuit board.
Preferably, the feed element includes the first fed element and the second fed element, first fed element and described
Two fed elements are connected with a dipole in two pairs of crossed dipoles respectively.
Preferably, the feed element is coaxial line, and the first fed element is the inner wire of head axis, and the second fed element is head
The outer conductor layer of axis.
The second aspect of the utility model embodiment, there is provided a kind of terminal, including such as any one of claim 1 to 9 institute
The antenna structure stated.
The utility model embodiment relative to prior art more have the advantage that including：The utility model embodiment,
Two pairs of crossed dipoles are respectively printed at the both sides of the medium substrate, and two pairs of parasitic antennas are respectively printed at the medium substrate
Both sides, two arc connectors are respectively printed at the both sides of the medium substrate, and each with each pair crossed dipoles respectively
Individual dipole arm connection, feed element is connected with a dipole arm in each pair crossed dipoles respectively, each by changing
The size of part can cover multiple bandwidth frequency ranges, realize multiple navigation band operations, go for all GNSS systems, bag
GPS, the Big Dipper, Galileo and GLONASS are included, is advantageous to the army and the people's use.
Brief description of the drawings
, below will be to embodiment or prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The required accompanying drawing used is briefly described in description, it should be apparent that, drawings in the following description are only that this practicality is new
Some embodiments of type, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation for the antenna structure that the utility model embodiment provides；
Fig. 2 is Fig. 1 upward view；
Fig. 3 is Fig. 1 stereogram；
Fig. 4 is the stereogram at Fig. 1 another visual angle；
Fig. 5 is Fig. 1 side view；
Fig. 6 is the structural representation for the dipole arm that the utility model embodiment provides；
Fig. 7 is the structural representation of feedback unit and arc connector in Fig. 1；
Fig. 8 is the structural representation of feedback unit and arc connector in Fig. 2；
Fig. 9 is the structural scheme of mechanism for the parasitic antenna that the utility model embodiment provides；
Figure 10 is the simulated reflections coefficient for the antenna structure that the utility model embodiment provides and the song of measurement reflectance factor
Line chart；
Figure 11 is the curve map of the axial ratio of simulation for the antenna structure that the utility model embodiment provides；
Figure 12 is the curve map of the simulated implementation gain for the antenna structure that the utility model embodiment provides.
Embodiment
In describing below, in order to illustrate rather than in order to limit, it is proposed that such as tool of particular system structure, technology etc
Body details, thoroughly to understand the utility model embodiment.However, it will be clear to one skilled in the art that there is no these
The utility model can also be realized in the other embodiments of detail.In other situations, omit to well-known system,
The detailed description of device, circuit and method, in case unnecessary details hinders description of the present utility model.
In order to illustrate technical scheme described in the utility model, illustrated below by specific embodiment.
The antenna structure that the utility model embodiment provides includes medium substrate, two pairs of crossed dipoles, two pairs of spurious elements
Part, two arc connectors and feed element.Two pairs of crossed dipoles are respectively printed at the both sides of the medium substrate.Two pairs are posted
Raw element is respectively printed at the both sides of the medium substrate.Two arc connectors are respectively printed at the two of the medium substrate
Side, it is connected respectively with each dipole arm of each pair crossed dipoles.Feed element respectively with one in each pair crossed dipoles
Individual dipole arm connection.
Optionally, two pairs of crossed dipoles include the four of two shape identical dipole arms and two pairs of crossed dipoles
Individual dipole arm shape all same.As shown in Figures 1 to 5, two pairs of crossed dipoles are printed on the both sides of medium substrate, are respectively
First side 101 and the second side 102.Two pairs of crossed dipoles include four dipole arms 201,202,203 and 204, dipole arm
201 and dipole arm 202 be located at the first side 101 of substrate, dipole arm 203 and dipole arm 204 are located at the second side of substrate
102。
In the present embodiment, dipole arm 201, dipole arm 202, the shape of dipole arm 203 and dipole arm 204 are homogeneous
Together, it is oval ring-type.The shape of each dipole arm is as shown in fig. 6, major axis is L1, short axle H1, width W1.
Wherein, the major parameter for influenceing antenna performance is longitudinal axis L 1 and short axle H1, and width W1.The minimum resonance of antenna
Frequency can be controlled by the length in the loop for changing oval ring-type.That is, the size of antenna is mainly determined by the value of longitudinal axis L 1,
The impedance bandwidth and circular polarisation bandwidth of antenna depend on short axle H1；Short axle H1 is bigger, and the impedance bandwidth of antenna is bigger, circular polarisation band
It is wide bigger.In one embodiment, L1 can be 34.3 millimeters, and H1 can be 24.4 millimeters, and W1 is 0.7 millimeter.
In the present embodiment, each arc connector is that two dipole arms in each pair crossed dipoles produce 90 °
Phase delay.Each arc connector is arc ring, as shown in Figure 7 and Figure 8, respectively arc connector 401 and arc
Shape connector 402.The radius of arc connector 401 is R1, thickness W3；The radius of arc connector 402 is R2, and thickness is
W5。
The frequency of circular polarized antenna performance is determined by the radius R1 of arc connector 401, because arc connector 401
Girth be equal to expected frequency quarter-wave.The width W3 of arc connector 401 will influence whether circular polarized antenna
The matching performance of bandwidth and antenna, therefore the size of arc connector 401 can be optimized by related software.For example,
R1 can be 7 millimeters, and W3 can be 1.5 millimeters, and R2 can be 7 millimeters, and W5 is equal with W3, can be 1.5 millimeters.
In one embodiment, feed element includes the first fed element and the second fed element, first fed element and described
Second fed element is connected with a dipole in two pairs of crossed dipoles respectively.For example, feed element can be coaxial cable,
First fed element is the inner wire of coaxial cable, and the second fed element is the outer conductor layer of coaxial cable.In the present embodiment, inner wire
A diameter of 1 millimeter.
Referring to Fig. 7, the first fed element 501 can be connected by the first rectangular conductor 503 with dipole arm 201.First square
The width of shape conductor 503 is that W2, length H2, such as W2 are 6 millimeters, and H2 is 7.6 millimeters.Referring to Fig. 8, the second fed element 502
It can be connected by the second rectangular conductor 504 with dipole arm 203.The width of second rectangular conductor 504 is W4, length H3,
Such as W4 is 6 millimeters, H3 is 7.6 millimeters.Wherein, the length and width of the first rectangular conductor 503, and the second rectangular conductor
504 length and width, it can influence the performance of antenna structure.
In the present embodiment, each pair parasitic antenna includes two arc rings, is separately positioned on two ends angle of medium substrate
Place.Each corresponding dipole arm of arc ring, each arc ring couple with corresponding dipole arm, are specifically as follows electric capacity coupling
Close.Referring to Fig. 1 and Fig. 2, first pair of parasitic antenna includes arc ring 301 and arc ring 302, and second pair of parasitic antenna includes arc
Ring 303 and arc ring 304.Arc ring 301 and arc ring 302 are located at two ends angle of the first side of medium substrate 101, arc ring
303 and arc ring 304 be located at two of the second side of medium substrate 102 ends angle.By using parasitic antenna, the size of antenna can be with
Substantially reduce.
Referring to Fig. 9, the geomery all same of each arc ring, for example, the length of arc ring 201 is L2, it is highly H4,
Thickness is W6.Here length is the distance between two end points of arc ring, highly on arc ring everywhere to two end points it
Between line distance maximum.
Wherein, the length L2 and height H4 of arc ring are the major parameters for influenceing antenna performance, and width W6 can influence arc
The impedance of shape ring.For example, H4 can be 13.9 millimeters, L2 can be 27.9 millimeters.
In the present embodiment, each dipole arm is also used as the radiator structure of antenna.Electric current can be in dipole arm
With a complete circle on ring structure（From 0 ° to 360 °）It is mobile.In such a case, it is possible to by using this oval ring
Shape structure improves the circular polarisation performance of antenna.More particularly, there may be more current paths (over different frequencies)
There are identical amplitude and 90 ° of phase delays.
In addition, the radiator structure of ring-shaped can improve impedance matching of the antenna in low frequency, so that the antenna of antenna
Size reduces, so as to reduce the new oval ring radiator in dipole arm.
In above-mentioned each embodiment, the material of two pairs of crossed dipoles is printed circuit board.
Above-mentioned antenna structure is described further below by way of simulated experiment.
The simulated reflections coefficient and measurement reflectance factor of antenna structure are as shown in Figure 10.The broadband a width of 1.16 of the antenna to
1.9 GHz, it is less than -10 decibels for S11.In GPS L1 wave bands (1.575 GHz), low to -30 decibels of S11 value, it is shown that
Fabulous impedance matching performance.The result of measurement is consistent well with expected performance.Above-mentioned antenna structure covers institute really
The GPS and Galileo wave band, performance needed is relatively preferable.
Axially ratio is shown as frequency in fig. 11 for the simulation of antenna structure.It can be seen that the circular polarisation bandwidth of antenna from
1.24 GHz to 1.87 GHz, axially than being less than 3 decibels.And under all bandwidth situations, the value of axial ratio is less than 4.5 points
Shellfish.This shows that above-mentioned antenna structure has circular polarisation bandwidth and the impedance of non-constant width.Above-mentioned antenna structure improves antenna really
Performance, reduce the size of antenna.
Figure 12 shows the simulated implementation gain of antenna structure, the function as frequency.As can be seen that the average receipts in broadband
Benefit is 2 dBi.Antenna structure in above-mentioned each embodiment is a kind of dipolar antenna structure, has bidirectional radiation pattern and width
Half-power beam width.One conductive ground plane reflector can be placed on below antenna structure to produce a kind of unidirectional radiation
Pattern and Geng Gao's realizes gain (at most up to 7 dBi).Space between antenna and reflector is probably lowest resonance frequency
The quarter-wave (64 millimeters) of (1.164 GHz).For a kind of configuration of low profile, a kind of broadband of covering frequence wave band
Artificial magnetic conductor (AMC) aircraft can be used for the floor for substituting conduction.So, this practicality of the antenna reflector of total height
It is new to be less than 20 millimeters.Because the bandwidth of extensive antenna and compact size are in current utility model, it not only may be used
For conventional GNSS applications and wireless telecommunications, but many portable uses are also used in, are such as arranged on the body or peace of soldier
Mounted in the application program of automobile navigation.
Above-mentioned antenna structure, two pairs of crossed dipoles are respectively printed at the both sides of the medium substrate, two pairs of parasitic antennas
The both sides of the medium substrate are respectively printed at, two arc connectors are respectively printed at the both sides of the medium substrate, and divide
Be not connected with each dipole arm of each pair crossed dipoles, feed element respectively with a dipole in each pair crossed dipoles
Sub- arm connection, the size by changing all parts can cover multiple bandwidth frequency ranges, realize multiple navigation band operations.
In one embodiment, terminal can include any of the above-described kind of antenna structure, and have any of the above-described kind of antenna structure
Possessed beneficial effect, this is repeated no more.
Embodiment described above is only to illustrate the technical solution of the utility model, rather than its limitations；Although with reference to before
Embodiment is stated the utility model is described in detail, it will be understood by those within the art that：It still can be with
Technical scheme described in foregoing embodiments is modified, or equivalent substitution is carried out to which part technical characteristic；And
These modifications are replaced, and the essence of appropriate technical solution is departed from the spirit of various embodiments of the utility model technical scheme
And scope, it should be included within the scope of protection of the utility model.
Claims (10)
- A kind of 1. antenna structure, it is characterised in that including：Medium substrate；Two pairs of crossed dipoles, it is respectively printed at the both sides of the medium substrate；Two pairs of parasitic antennas, it is respectively printed at the both sides of the medium substrate；Two arc connectors, be respectively printed at the both sides of the medium substrate, respectively with each idol of each pair crossed dipoles Extremely sub- arm connection；Feed element, it is connected respectively with a dipole arm in each pair crossed dipoles.
- 2. antenna structure according to claim 1, it is characterised in that it is identical that each pair crossed dipoles includes two shapes Dipole arm, and four dipole arm shape all sames of two pairs of crossed dipoles are oval ring-type.
- 3. antenna structure according to claim 2, it is characterised in that the major axis of the vesica piscis is L1, short axle H1, Width is W1.
- 4. antenna structure according to claim 2, it is characterised in that each arc connector is each pair cross dipole Two dipole arms in son produce 90 ° of phase delays, and each arc connector is arc ring, the radius of each arc ring For R1, thickness W3.
- 5. antenna structure according to claim 1, it is characterised in that each pair parasitic antenna includes two arc rings, respectively It is arranged at two ends angle of the medium substrate.
- 6. antenna structure according to claim 5, it is characterised in that the length of the arc ring is L2, is highly H4, thick Spend for W6.
- 7. antenna structure according to claim 1, it is characterised in that the material of two pairs of crossed dipoles is printing Circuit board.
- 8. antenna structure according to claim 1, it is characterised in that the feed element includes the first fed element and second Fed element, first fed element and second fed element are connected with a dipole in two pairs of crossed dipoles respectively.
- 9. antenna structure according to claim 8, it is characterised in that the feed element is coaxial line, the first fed element For the inner wire of head axis, the second fed element is the outer conductor layer of head axis.
- 10. a kind of terminal, it is characterised in that including the antenna structure as described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721116795.8U CN207098057U (en) | 2017-09-01 | 2017-09-01 | Antenna structure and terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721116795.8U CN207098057U (en) | 2017-09-01 | 2017-09-01 | Antenna structure and terminal |
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| CN207098057U true CN207098057U (en) | 2018-03-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611606A (en) * | 2017-09-01 | 2018-01-19 | 人天通信设备股份有限公司 | Antenna structure and terminal |
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- 2017-09-01 CN CN201721116795.8U patent/CN207098057U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611606A (en) * | 2017-09-01 | 2018-01-19 | 人天通信设备股份有限公司 | Antenna structure and terminal |
| CN107611606B (en) * | 2017-09-01 | 2023-11-17 | 人天通信设备股份有限公司 | Antenna structure and terminal |
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