CN107069193A - A kind of method that signal is sent on miniaturization gps antenna based on Meta Materials - Google Patents
A kind of method that signal is sent on miniaturization gps antenna based on Meta Materials Download PDFInfo
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- CN107069193A CN107069193A CN201611163307.9A CN201611163307A CN107069193A CN 107069193 A CN107069193 A CN 107069193A CN 201611163307 A CN201611163307 A CN 201611163307A CN 107069193 A CN107069193 A CN 107069193A
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- antenna
- paster
- gps antenna
- bandwidth
- miniaturization
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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
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
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Abstract
The invention discloses a kind of method that signal is sent on miniaturization gps antenna based on Meta Materials, methods described sends and receives signal of communication including the use of the miniaturization gps antenna based on Meta Materials, eight complementary resonance ring modes, which are embedded in, by using RIS structures and on floor reduces antenna size, simultaneously using opened on paster 2 pairs diagonally symmetrical and of different sizes annular slot excite circular polarization radiation ripple, compared with other miniature antennas, the impedance bandwidth of this antenna is wider, gain also improves a lot, compact conformation, is easy to processing.
Description
Technical field
The present invention relates to the technical field of miniaturization gps antenna, more specifically to a kind of based on the small-sized of Meta Materials
Change gps antenna.
Background technology
Modern wireless communication systems increasingly strengthen the miniature requirement of antenna, and miniature antenna is in GPS navigation in recent years
Terminal is widely used, miniaturization, circular polarisation and it is broadband the problems such as also turn into GPS navigation area research in heat
Point, GPS navigation system requires that antenna has good circular polarisation performance, and circular polarisation has the advantage that：First, circular polarized antenna can be with
Receive any polarization incoming wave；Second, rotation direction orthogonality has and is widely applied very much in circular polarized antenna in many fields；3rd,
Circularly polarised wave incides symmetric targets and occurs rotation direction rotation.Therefore gps antenna terminal suppresses misty rain interference and anti-multipath reflection.It is micro-
Miniaturization Design method with antenna is a lot, including loading technique is used, stitch of slotting, additional active electric network, and makes
With Meta Materials etc..
In existing document, Nasimuddin in 2013, Zhi Ning Cheng are in IEEE antennas and
Propagation Magazine deliver entitled " Slotted microstrip antennas for circular
Polarization with compact size " article, Chen M, Chen C C are in IEEE antennas within 2013
And Wireless Propagation Letters deliver entitled " A compact dual-band GPS antenna
Design " article, Chen W S, Wu C K, Wong K L deliver entitled " Electrpact in Comcuts within 1998
circularly-polarized circular microstrip antenna with cross slot and
The mode slotted respectively on radiation patch surface in peripheral onics Letters " article, article realizes miniaturization,
But the impedance bandwidth of antenna is narrower.
In existing document, Yuandan Dong, Hiroshi Toyao are in IEEE transa-ctions and within 2012
Propagation delivers entitled " Design and characterization of miniaturized patch
Antennas loaded with complementary split-ring resonators " article, He Xiu in 2013
Xu, Guang Ming Wang deliver entitled " Compact in IEEE transactions and propagation
Circularly polarized antennas combining m-eta-surfaces and strong space-
Filling meta-resonators " article, Hsing Yi chen, Yu Tao are in IEEE transa-ctions within 2011
On antennas and propagation deliver entitled " Performance improvement of a U-slot patch
antenna using a dual-band frequency selective surface with modified jerualem
Cross element-s " article, realizes the miniaturization of antenna in article by using RIS structures, improves impedance band
Width, but antenna gain has much room for improvement.
In existing document, J.S.Guo and G.B.Hsieh in 2003 are in IEEE transactions on
Antennas and propagation deliver entitled " Gain enhancement of a circularly polarized
Equilatera-l triangular microstrip antena with a slotted ground plane " article,
J.W.Baik in 2013, S.J.Kim deliver entitled in Microwave and optical technology letters
“Circularly polarized microstrip antenna using asymmetrical ring sector slots
Embedded on the ground plane " article, by complementary resonance ring in article（CSRRS）The paster of flush antenna
The gain in centre frequency is improved on upper or floor, but impedance bandwidth is narrower.
The deficiency of present invention design for more than makes there is provided a kind of new miniaturization gps antenna and its design method
Obtaining the size of antenna has very big reduction, while being also significantly increased in terms of impedance bandwidth and gain.
The content of the invention
It is an object of the invention to overcome shortcoming and deficiency of the prior art, there is provided a new based on the small of Meta Materials
Type gps antenna, is embedded in eight complementary resonance ring modes by using RIS structures and on floor and reduces antenna size, simultaneously
Using opened on paster 2 pairs diagonally symmetrical and of different sizes annular slot excite circular polarization radiation ripple, with
Other miniature antennas are compared, and the impedance bandwidth of this antenna is wider, and gain also improves a lot, compact conformation, are easy to add
Work.
In order to achieve the above object, the technical scheme is that：It is a kind of based on the small-sized of Meta Materials
Change gps antenna, using the mode of coaxial feed, using double-decker, it is characterised in that：Including upper strata paster, intermediate patches, under
Layer paster.
The upper strata paster processing is 3mm in thickness, and dielectric constant is above 3.38 medium substrate.
The intermediate patches are located in the middle of 2 dielectric-slabs.
Lower floor's paster processing is 3mm in thickness, and dielectric constant is 4.4 FR4 materials bottom.
Described and two medium substrate sizes are all 51mm*51mm*3mm.
Eight complementary resonance rings are embedded in using RIS structures and on floor.
Simultaneously using opened on paster 2 pairs diagonally symmetrical and of different sizes annular slot excite entelechy
Change radiated wave.
Antenna emulation impedance bandwidth is 100MHz, and the 3dB axial ratio bandwidths of antenna are respectively 16.5MHz, in centre frequency
The gain of antenna is 3.70dBic during 1.575GHz.
The overall dimensions 0.267 of antenna*0.267*0.031。
The emulation impedance bandwidth of antenna is 1.55GHz ~ 1.65GHz.
The 3dB axial ratio bandwidth simulation results of antenna are respectively 1.5745 ~ 1.590GHz.
The maximum gain of actual measurement of the antenna at 1.575GHz is 3.703dBi.
Parameter x0 is preferably 7.8.
Parameter l is preferably 41mm, centre frequency f=1.575GHz.
More specifically, circular polarisation is formed by motivating that 2 amplitudes are equal, and polarization mode is orthogonal, and phase differs 90 °
Line polarization wave, the present invention encourages amplitude using cutting 2 pairs of annular slots diagonally in radiation patch cell surface
It is equal, 2 orthogonal degenerate modes of polarization mode, while by adjusting the size and relative position on 2 pairs of annular slot sides in 2 letters
And phase quadrature is formed between mould, realize right-handed circular polarization.
The antenna utilizes the mode of coaxial feed, using double-decker, and 3 layers of paster are corresponding in turn to upper, middle and lower 3 from top to bottom
Layer paster, upper strata paster processing is 3mm in thickness, and dielectric constant is that above 3.38 medium substrate, intermediate patches are located at 2 Jie
In the middle of scutum, the processing of lower floor paster is 3mm in thickness, and dielectric constant is 4.4 FR4 materials bottom, and two medium substrates
Size is all 51mm*51mm*3mm, and specific parameter designing is as shown in Table 1:
The design parameter of the antenna of table one
RIS units have a square-shaped metal conductor patch, by dielectric material（Relative dielectric constant=4.4）The medium being made
Substrate and metallic conductor, earth plate composition.
It can be seen from transmission line theory, the RIS units can be equivalent with parallel resonant LC circuit, and the size of RIS units is remote
Much smaller than one operation wavelength, its electromagnetic property can be with lumped inductance and lumped capacity come equivalent.Lumped inductance L is essentially from print
Square conductor patch on brush medium substrate；The parallel voltage shapes of lumped capacity C then between adjacent prismatic metallic conductor paster
Into.The RIS cell surface impedances for being equivalent to LC antiresonant circuits are：
Wherein XL=Zdtankd；
It is theoretical more than, surface impedance for net resistance RIS units by one suitable surface resistance value of selection, can
Effectively to reduce the size of antenna and improve the front and rear ratio and bandwidth of microstrip antenna.
Split ring resonator is to realize one of the most frequently used structure of LHM, and SRR resonant frequencies are：
Wherein L is SRR self-induction, and C is the total capacitance between two rings, and C=2 π r0CpulIn formula, CpulFor two interannular gap units
Length electric capacity.
By above formula understands that SRR resonant frequency can be adjusted by changing its structural parameters.
If SRR ring metal parts replaced with vacuum, and blank in its original ring is filled with metal structure, then with regard to shape
Into CSRR.
Herein it is main by complementary resonance ring be embedded in floor simultaneously with reactive metal covering（RIS）Design be combined together, so
The antenna of design also causes the impedance bandwidth of antenna while miniaturization is realized, the performance such as gain and front and rear ratio is shown
The raising of work.
The result of S11 emulation and the actual measurement of antenna can be seen that the emulation impedance bandwidth of antenna for 1.55GHz ~
1.65GHz,；Due to machining accuracy error and the unstability of medium, the frequency of actual measurement is slightly relatively low, and it is imitative to survey bandwidth ratio
True bandwidth is small.
The axle of designed antenna than emulation and test result, the 3dB axial ratio bandwidth simulation results of antenna are respectively
1.5745~1.590GHz；The bandwidth of actual measurement and emulation reaches unanimity substantially.
When being operated in 1.575GHz, radiation patch Surface current distribution situation, paster opens 2 pairs of square seams of different sizes
After gap, the distribution of surface current is changed.The electric current of chip surface shows dextrorotation entelechy with the change of 0 ° to 270 ° of phase
Change radiation mode i.e. in 1.575GHz in+z directions, aerial radiation right-handed circular polarization ripple.
The maximum gain of actual measurement of the antenna at 1.575GHz is 3.703dBi, due to the loss of fabrication error and material,
Survey gain and be less than simulated gain.In centre frequency 1.575GHz, the normalization antenna pattern of antenna, main polarization mode is
Right circular polarisation, radiation characteristic is good.
Influence of parameter x0 and the l change to antenna, as x0=7.8, preferably, i.e., matching effect is most for antenna S11 effects
It is good., resonant frequency with l increase frequencies go lower, while l=41 Time Bandwidths are most wide, and including centre frequency f=1.575GHz, institute
To take l=41mm.
In order to protrude the advantage of this new structure, herein finally by this new structure and traditional gps antenna knot
Structure is contrasted, and traditional gps antenna is not plus CSRR and HIS antennas not only narrower bandwidth but also centre frequency is higher, when
Distinguish on the basis of traditional antenna and only add HIS structures and add HIS and CSRR structures simultaneously, as a result find this structure not only center frequency
Rate step-down, has also broadened many with Time Bandwidth.
A kind of method that signal is sent on miniaturization gps antenna based on Meta Materials, methods described is including the use of based on super
The miniaturization gps antenna of material sends and receives signal of communication, it is characterised in that：Using the mode of coaxial feed, using bilayer
Structure, it is characterised in that：Including upper strata paster, intermediate patches, lower floor's paster.
The upper strata paster processing is 3mm in thickness, and dielectric constant is above 3.38 medium substrate.
The intermediate patches are located in the middle of 2 dielectric-slabs.
Lower floor's paster processing is 3mm in thickness, and dielectric constant is 4.4 FR4 materials bottom.
Described and two medium substrate sizes are all 51mm*51mm*3mm.
Eight complementary resonance rings are embedded in using RIS structures and on floor.
Simultaneously using opened on paster 2 pairs diagonally symmetrical and of different sizes annular slot excite entelechy
Change radiated wave.
Antenna emulation impedance bandwidth is 100MHz, and the 3dB axial ratio bandwidths of antenna are respectively 16.5MHz, in centre frequency
The gain of antenna is 3.70dBic during 1.575GHz.
The overall dimensions 0.267 of antenna*0.267*0.031。
The emulation impedance bandwidth of antenna is 1.55GHz ~ 1.65GHz.
The 3dB axial ratio bandwidth simulation results of antenna are respectively 1.5745 ~ 1.590GHz.
The maximum gain of actual measurement of the antenna at 1.575GHz is 3.703dBi.
Parameter x0 is preferably 7.8.
Parameter l is preferably 41mm, centre frequency f=1.575GHz.
Brief description of the drawings
Fig. 1 shows the antenna structure of the present invention.
Fig. 2 shows the antenna structure side view of the present invention.
Fig. 3 shows the integrated antenna figure from the top down of the present invention.
Fig. 4 shows the RIS model of elements of the present invention.
Fig. 5 shows the SRR structures of the present invention.
Fig. 6 shows the result of the S11 emulation and actual measurement of the antenna of the present invention.
Fig. 7 show the present invention antenna axle than emulation and test result.
Fig. 8 shows the antenna surface CURRENT DISTRIBUTION of the present invention with phase place change.
Fig. 9 shows influence of the parameter x0 of the present invention change to antenna.
Figure 10 shows influence of the parameter l of the present invention change to antenna.
Figure 11 shows the antenna and the comparison diagram of traditional gps antenna structure of the present invention.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
The present invention is illustrated by taking model FR4 substrate as an example, in embodiment, and unit 1 is first module, and unit 2 is the
Unit two, unit 3 is third unit, and unit 4 is Unit the 4th.
The element antenna system of broadband four of the present invention includes antenna, and antenna overall structure is shown in Fig. 1（a）, paster is printed on phase
It is that 4.4, loss tangent is the FR4 dielectric-slabs front that 0.02, size is the mm of the mm of 108 mm × 60 × 1.6, ash to dielectric constant
The floor of color is at its back side.The antenna system is made up of four identical " ∏ " type planar inverted-F antenna units, symmetrical
On positive four angles of dielectric-slab.In order to improve the isolation between antenna element, width is used between unit 1 and unit 2
Connected for 0.5 mm neutralization line, neutralize short circuit grounding in the middle of line, while extend ground minor matters, and in the middle of unit 1 and unit 3
A length of 15 mm, a width of 1 mm rectangular channel are opened on floor.
Circular polarisation is formed by motivating that 2 amplitudes are equal, and polarization mode is orthogonal, and phase differs 90 ° of line polarization wave,
The present invention is equal in radiation patch cell surface excitation amplitude using 2 pairs of annular slots diagonally are cut, polarization side
2 orthogonal degenerate modes of formula, at the same by adjust 2 pairs of annular slot sides size and relative position between 2 degenerate modes shape
Difference in 90 °, realizes right-handed circular polarization.
Designed antenna structure such as Fig. 1, shown in 2,3, the antenna utilizes the mode of coaxial feed, using double-decker,
As can be seen from the figure 3 layers of paster are corresponding in turn to 3 layers of paster of Fig. 2 upper, middle and lowers to Fig. 1 from top to bottom, and Fig. 3 is seen from above whole
Body antenna figure, upper strata paster processing is 3mm in thickness, and dielectric constant is that above 3.38 medium substrate, intermediate patches are located at 2
In the middle of dielectric-slab, the processing of lower floor paster is 3mm in thickness, and dielectric constant is 4.4 FR4 materials bottom, and two medium bases
Plate size is all 51mm*51mm*3mm, and specific parameter designing is as shown in Table 1:
The design parameter of the antenna of table one
| Parameter | a | b | l | S1 | S2 | g | h0 |
| Size/mm | 51 | 47.1 | 41 | 12 | 6.9 | 0.6 | 3 |
| Parameter | h | x0 | a1 | a2 | c | D | g1 |
| Size/mm | 3 | 7.8 | 7.1 | 8 | 8.8 | 0.7 | 0.5 |
As shown in figure 3, RIS units have a square-shaped metal conductor patch, by dielectric material（Relative dielectric constant=4.4）
The medium substrate and metallic conductor being made, earth plate composition.It can be seen that wherein a1 is RIS unit dielectric substrates
Size, a2 is the size of square-shaped metal conductor patch, and the thickness of the dielectric substrate between metallic conductor paster and floor is h1+
h2。
It can be seen from transmission line theory, the RIS units can be equivalent with parallel resonant LC circuit, as shown in figure 4, RIS is mono-
The size of member is far smaller than an operation wavelength, and its electromagnetic property can be with lumped inductance and lumped capacity come equivalent.Lumped inductance L
Square conductor patch on printed medium substrate；Lumped capacity C is then between adjacent prismatic metallic conductor paster
Parallel voltage is formed.The RIS cell surface impedances for being equivalent to LC antiresonant circuits are
Wherein
XL=Zdtankd
It is theoretical more than, surface impedance for net resistance RIS units by one suitable surface resistance value of selection, can
Effectively to reduce the size of antenna and improve the front and rear ratio and bandwidth of microstrip antenna.
Split ring resonator is to realize one of the most frequently used structure of LHM, classical SRR structures as shown in Fig. 2 wherein g, s,
W, l represent the openings of sizes of square aperture resonant ring, inner and outer ring distance, metal bandwidth, the outer shroud length of side, l1, l2, l3 tables respectively
Show its equivalent inductance, SRR equivalent circuit diagrams are as figure 5 illustrates
SRR resonant frequencies are：
Wherein L is SRR self-induction, and C is the total capacitance between two rings, and C=2 π r0CpulIn formula, CpulFor two interannular gap units
Length electric capacity.
By above formula understands that SRR resonant frequency can be adjusted by changing its structural parameters.
If SRR ring metal parts replaced with vacuum, and blank in its original ring is filled with metal structure, then with regard to shape
Into complementary resonance ring（CSRR）.
Herein it is main by complementary resonance ring be embedded in floor simultaneously with reactive metal covering（RIS）Design be combined together,
The antenna so designed also causes the impedance bandwidth of antenna while miniaturization is realized, the performance such as gain and front and rear ratio is obtained
Significant raising.
The result of S11 emulation with the actual measurement of antenna is as shown in fig. 6, it can be seen that the emulation impedance bandwidth of antenna
For 1.55GHz ~ 1.65GHz,；Due to machining accuracy error and the unstability of medium, the frequency of actual measurement is slightly relatively low, and in fact
Survey bandwidth ratio simulation bandwidth small.
The axle of designed antenna than emulation and test result as shown in fig. 7, the 3dB axial ratio bandwidths simulation result point of antenna
Wei not 1.5745 ~ 1.590GHz；The bandwidth of actual measurement and emulation reaches unanimity substantially.
Fig. 8 is radiation patch Surface current distribution situation, it can be seen that paster opens 2 when being operated in 1.575GHz
After square gap of different sizes, the distribution of surface current is changed.The electric current of chip surface is with 0 ° to 270 ° of phase
Change show right-handed circular polarization radiation mode i.e. in 1.575GHz in+z directions, aerial radiation right-handed circular polarization ripple.
The maximum gain of actual measurement of the antenna at 1.575GHz is 3.703dBi, due to the loss of fabrication error and material,
Survey gain and be less than simulated gain.In centre frequency 1.575GHz, the normalization antenna pattern of antenna, main polarization mode is
Right circular polarisation, radiation characteristic is good.
Influence of parameter x0 and the l change to antenna as shown in figs. 9-10, as shown in Figure 9, as x0=7.8, antenna S11
Preferably, i.e., matching effect is best for effect.As shown in Figure 10, resonant frequency with l increase frequencies go lower, while l=41 Time Bandwidth most
Width, and including centre frequency f=1.575GHz, so taking l=41mm.
In order to protrude the advantage of this new structure, herein finally by this new structure and traditional gps antenna knot
Structure is contrasted, and as shown in Figure 10, as shown in Figure 10, traditional gps antenna is not add CSRR and HIS antennas to comparison diagram, not only
Narrower bandwidth and centre frequency is higher, when on the basis of traditional antenna respectively only plus HIS structures and simultaneously plus HIS and CSRR knots
Structure, as a result finds this structure not only centre frequency step-down, has also been broadened with Time Bandwidth a lot.
Invention provides a kind of novel miniaturization gps antenna based on Meta Materials herein, is embedded in ground using complementary resonance ring
Plate and reactive metal covering（RIS）Design be combined method, not only cause antenna size significantly reduce, while in antenna
Also improved a lot in terms of impedance bandwidth and gain, the antenna performance so designed is good, compact conformation, be easy to processing,
It is with a wide range of applications in terms of satellite navigation.
Claims (9)
1. sending the method for signal on a kind of miniaturization gps antenna based on Meta Materials, methods described is including the use of based on super material
The miniaturization gps antenna of material sends and receives signal of communication, it is characterised in that：Using the mode of coaxial feed, using bilayer knot
Structure, it is characterised in that：Including upper strata paster, intermediate patches, lower floor's paster.
2. according to the method described in claim 1, it is characterised in that：The upper strata paster processing is 3mm, dielectric constant in thickness
Above 3.38 medium substrate.
3. method according to claim 2, it is characterised in that：The intermediate patches are located in the middle of 2 dielectric-slabs.
4. method according to claim 3, it is characterised in that：Lower floor's paster processing is 3mm, dielectric constant in thickness
For 4.4 FR4 materials bottom.
5. method according to claim 4, it is characterised in that：Described and two medium substrate sizes are all 51mm*
51mm*3mm。
6. according to the method described in claim 1, it is characterised in that：Eight complementations are embedded in using RIS structures and on floor humorous
Shake ring.
7. according to the method described in claim 1, it is characterised in that：Utilize simultaneously and 2 pairs are opened on paster diagonally
Symmetrical and of different sizes annular slot excites circular polarization radiation ripple.
8. according to the method described in claim 1, it is characterised in that：Antenna emulation impedance bandwidth is 100MHz, the 3dB axles of antenna
It is respectively 16.5MHz than bandwidth, in centre frequency 1.575GHz, the gain of antenna is 3.70dBic.
9. according to the method described in claim 1, it is characterised in that：The overall dimensions of antenna are 0.267*0.267
*0.031。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611163307.9A CN107069193A (en) | 2016-12-16 | 2016-12-16 | A kind of method that signal is sent on miniaturization gps antenna based on Meta Materials |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611163307.9A CN107069193A (en) | 2016-12-16 | 2016-12-16 | A kind of method that signal is sent on miniaturization gps antenna based on Meta Materials |
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| CN107069193A true CN107069193A (en) | 2017-08-18 |
Family
ID=59618622
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137752A (en) * | 2021-11-18 | 2022-03-04 | 武汉大学 | Electrically driven near-far field simultaneous multiplexing dynamic display method and application |
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2016
- 2016-12-16 CN CN201611163307.9A patent/CN107069193A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137752A (en) * | 2021-11-18 | 2022-03-04 | 武汉大学 | Electrically driven near-far field simultaneous multiplexing dynamic display method and application |
| CN114137752B (en) * | 2021-11-18 | 2024-04-26 | 武汉大学 | Electrically driven near-far field simultaneous multiplexing dynamic display method and application |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170818 |
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| WW01 | Invention patent application withdrawn after publication |