CN109524768A - A kind of washable flexible wearable medium buries circular polarization microstrip antenna - Google Patents
A kind of washable flexible wearable medium buries circular polarization microstrip antenna Download PDFInfo
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- CN109524768A CN109524768A CN201811367705.1A CN201811367705A CN109524768A CN 109524768 A CN109524768 A CN 109524768A CN 201811367705 A CN201811367705 A CN 201811367705A CN 109524768 A CN109524768 A CN 109524768A
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- circular polarization
- flexible wearable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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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Abstract
A kind of washable flexible wearable medium disclosed by the invention buries circular polarization microstrip antenna, including medium substrate, first medium coating, second medium coating and conductor patch；Wherein, the conductor patch includes ground plane and radiation patch, and the ground plane is between first medium coating and medium substrate；The radiation patch is electrically connected with microstrip line between second medium coating and medium substrate；The conductor patch is wrapped in interior by the first medium coating, the medium substrate and the second medium coating.The present invention has many advantages, such as that light-weight, inhibition misty rain interference, anti-multipath reflection, small in size, at low cost, processing is fast, easy conformal, waterproof, safety, is easy to match with integrated circuit, is suitable for UHF RFID and GSM, anticorrosion and washability.
Description
Technical field
The invention belongs to antenna technology and technology for radio frequency field, in particular to a kind of washable flexible wearable medium
Bury circular polarization microstrip antenna.
Background technique
Currently, accessing the mobile terminal of internet in a variety of manners at explosive with the rapid development of Internet of Things (IoT)
Increase, especially make body area network (BAN), i.e., communications network system body-centered has obtained good development environment, stimulation
The demand of mobile terminal antenna, the property complicated and changeable based on application environment also propose higher want to terminal radio frequency front end
It asks, also becomes current one of research hotspot.Traditional antenna development is more mature, but cannot extend, be bent, conformal and immersion
And based on good duplex communication capabilities are not able to maintain under these mechanical or environmental requirements, to limit wearable antenna in body
The large-scale application of domain net.The variations such as antenna deformation, immersion, corrosion directly affect antenna self performance, and traditional antenna cannot be total to
Shape soaks, is corroded, and makes it that cannot play one's part to the full in the development of body area network.
Therefore, how to provide a kind of applicable body area network, washable flexible wearable medium bury circular polarization microstrip antenna
It is those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of flexible wearable antenna based on body area network, has weight
Gently, anti-multipath reflects, is small in size, at low cost, processing the advantages that fast, easy conformal, waterproof, safety, anticorrosion and washability.For
Realize that its concrete scheme of above-mentioned purpose is as follows:
Circular polarization microstrip antenna is buried the invention discloses a kind of washable flexible wearable medium, including medium substrate,
First medium coating, second medium coating and conductor patch；Wherein, the conductor patch includes ground plane and radiation patch
Piece, the ground plane is between first medium coating and medium substrate；The radiation patch is located at second medium covering
Between layer and medium substrate, and it is electrically connected with microstrip line；The first medium coating, the medium substrate and described second
The conductor patch is wrapped in interior by dielectric passivation.
Preferably, the first medium coating, the medium substrate and the second medium coating are long identical with width,
And the edge of the conductor patch is in the first medium coating, Jie of the medium substrate and the second medium coating
Have at a distance from fixed in matter edge and with the medium edge.
Preferably, the ground plane, the radiation patch and the microstrip line are nano silver material, through the ink-jet side 3D
Method is printed upon the surface of the medium substrate.3D inkjet printing makes conductor patch and micro-strip linear velocity is fast, and precision is high.
Preferably, the medium substrate, the first medium coating and the second medium coating are all made of thermoplastic
Property elastomer 3D printing wire rod NinjaFlex material, by by FDM method by the medium substrate, the first medium
Coating and second medium coating seamless connection.NinjaFlex is a kind of flexible material and utilizes 3D inkjet printing
Nano silver material also has flexibility, so that pliability of the invention greatly increases, is suitable for wearing.
Preferably, the radiation patch is diagonally opened up there are two chamfering, and in the radiation patch interposition
It sets, offers rectangular channel along same diagonal direction.
Preferably, the long Lp=87.5mm of the radiation patch, wide Wp=87.5mm；The width of the chamfering is 9.8mm；Institute
State a length of 32mm of rectangular channel.
Preferably, the long Lf=40mm of the microstrip line, wide Wf=8mm.Flexible wearable antenna uses feed microstrip line
In order to which antenna and integrated circuit are integrated, it is easy to accomplish impedance matching.
Preferably, the height H2=3.4mm between the radiation patch and the ground plane.
Preferably, the long L of the ground planeg=160mm, wide Wg=161mm is a rectangle nanometer silver conductor, using square
Gain can be improved in shape patch, increases radiation efficiency and is easy to make.
Preferably, the ground plane and the microstrip line are all connected with SMA connector.
Compared with the prior art the present invention has the advantages that
1) due to medium by radiation patch and ground plane it is fully wrapped around including, provide safeguard measure for antenna, guarantee
The waterproofness of antenna, safety are a kind of washable wearable antennas.
2) large area ground connection substantially reduces backward radiation to protect human-body safety, so that organism is lossless to antenna
Consumption, antenna is to organism fanout free region, so the invention has safety to human body.
3) using 3D inkjet printing technology production feeding microstrip line, radiation patch and ground plane, and made using nano silver
For 3D printing conductor material；Using FDM method print media, medium uses NinjaFlex flexible material, meets flexible media and bury
The requirement for hiding circular polarized antenna, has many advantages, such as washability, anticorrosion.
4) antenna structure formed due to slotting position appropriate among radiation patch makes antenna have circular polarisation effect,
Circularly polarised wave, which can be received, can also receive line polarization wave, have many advantages, such as anti-multipath reflection, inhibit misty rain interference.
5) have it is light-weight, inhibit misty rain interference, anti-multipath reflection, small in size, at low cost, processing is fast, it is easily conformal, be easy to
It matched with integrated circuit, be suitable for the advantages that UHF, RFID and GSM, anticorrosion.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the overhead sectional view one that a kind of washable flexible wearable medium of the present invention buries circular polarization microstrip antenna；
Fig. 2 is the overhead sectional view two that a kind of washable flexible wearable medium of the present invention buries circular polarization microstrip antenna；
Fig. 3 is the side view cutaway drawing that a kind of washable flexible wearable medium of the present invention buries circular polarization microstrip antenna；
Fig. 4 is return loss comparison diagram of the inventive antenna when being bent work along its X-axis under four kinds of states；
Fig. 5 is axis ratio AR comparison diagram when inventive antenna is bent work along its X-axis under four kinds of states；
Fig. 6 is the radiation gain directional diagram of XOZ plane when inventive antenna is bent work along its X-axis under four kinds of states；
Fig. 7 is the radiation gain directional diagram of YOZ plane when inventive antenna is bent work along its X-axis under four kinds of states；
Fig. 8 is axis ratio AR comparison diagram when inventive antenna is bent work along its Y-axis under four kinds of states；
Fig. 9 is return loss comparison diagram when inventive antenna is bent work along its Y-axis under four kinds of states；
Figure 10 is the radiation gain directional diagram of XOZ plane when inventive antenna is bent work along its Y-axis under four kinds of states；
Figure 11 is the radiation gain directional diagram of YOZ plane when inventive antenna is bent work along its Y-axis under four kinds of states.
In Fig. 1:
1 is medium substrate, and 2 be first medium coating, and 3 be second medium coating, and 5 be radiation patch, and 6 be micro-strip
Line, 51 be chamfering, and 52 be rectangular channel.
In Fig. 2:
1 is medium substrate, and 4 be ground plane.
In Fig. 3:
1 is medium substrate, and 2 be first medium coating, and 3 be second medium coating, and 4 be ground plane, and 5 be radiation patch
Piece, 6 be microstrip line.
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 described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to attached drawing 1 to attached drawing 3, the top view of circular polarization microstrip antenna is buried for a kind of washable flexible wearable medium
And side view, below embodiment of the present invention is described further in detail.
It as shown in figure 1 and 2 include medium substrate 1, first medium coating 2, second medium coating 3 and conductor patch
Piece；Wherein, conductor patch includes ground plane 4 and radiation patch 5, and ground plane 4 is located at first medium coating 2 and medium base
Between bottom 1；Radiation patch 5 is electrically connected with microstrip line 6 between second medium coating 3 and medium substrate 1；First
Conductor patch is wrapped in interior by dielectric passivation 2, medium substrate 1 and second medium coating 3.First medium coating 2, medium
Substrate 1 and the length of second medium coating 3 are identical with width, and the edge of conductor patch is in first medium coating 2, medium substrate 1
Have at a distance from fixed in the medium edge of second medium coating 3 and with medium edge.Radiation patch 5 diagonally opens up
There are two chamferings 51, and in 5 middle position of radiation patch, offer rectangular channel 52 along same diagonal direction.
As shown in Fig. 1 because the width of feeding microstrip line directly affects the matching impedance of antenna, to be suitble to 50 ohm
Impedance matching, this micro belt line width use 8mm, the long L of microstrip linef=40mm.To make antenna in uhf band with good
Performance and good duplex communication capabilities are kept in the bent state, rectangular radiation patch is designed as long Lp=87.5mm, wide Wp
=87.5mm cuts the chamfering of 9.8mm and opens the rectangular channel of 32mm length to realize circular polarisation effect, to reach anti-multipath reflection
Performance, and using 3D ink-jet by nano silver metallic print be radiation patch, microstrip line and ground plane.Based on wearable day
Line, it is necessary to the safety for reducing the backward radiation of antenna to increase antenna to human body makes antenna SAR value meet national standard, this
Designing large area ground connection is Lg=160mm, WgThe rectangle of=161mm, equally applicable 3D ink-jet technology print nanometer silver metal.Benefit
Medium is penetrated with SMA connector to connect with nano silver, is separately connected microstrip line and ground plane is fed.
Medium substrate, first medium coating, second medium coating are that FDM technology will as shown in Fig. 3
NinjaFlex wire rod printing shaping, the technology manufacturing speed is fast, and precision is high.The length and width of medium are 170mm, medium substrate
Height H2The height H of=3.4mm, first medium coating and second medium coating1=H3=0.5mm, is printed using FDM
Three layers of medium are seamlessly connected by technology.
By many experiments and emulation, after carrying out finite element analysis to above-mentioned parameter, in the feelings for minimizing microstrip antenna
Above-mentioned relevant size mutually has been obtained under condition.Due to uhf band electromagnetic wave in transmission process to small in structure size
Variation it is more sensitive, i.e., can to the performance of antenna generate large effect；Also, in field of antenna, reference vector is more,
And with connection closely between each dimensional parameters, antenna is whole according to the size design in the present embodiment, can be obtained
Ideal bandwidth and preferable gain.
Working performance comparison diagram when attached drawing 4 is bent for antenna along its X-axis to Fig. 7, wherein red line is antenna flat
Working performance curve, the pink colour line of state are the working performance curve of bending radius 80mm, green line is bending radius 150mm
The working performance curve that working performance curve, blue line are bending radius 300mm.X-direction is along the setting side of microstrip line 6
To y-axis direction is the setting direction perpendicular to microstrip line 6.
It is illustrated in figure 4 return loss comparison diagram of the antenna when being bent work along its X-axis under four kinds of states.Abscissa is
Frequency, unit GHz；Ordinate is return loss (S11), unit decibel (dB).According to professional standard, S11< -10dB can assert
To can work normally, S11Smaller, working condition is better.The bandwidth for meeting this condition is bandwidth of operation.Antenna Operation is flat
When with bending 300mm, (S can be worked normally in 915MHz frequency range11<-10dB)；Antenna Operation is in flat and bending radius
It, can be in 950MHz band operation when 80mm.
It is illustrated in figure 5 axis ratio AR comparison diagram when antenna is bent work along its X-axis under four kinds of states, wherein abscissa
For angle theta, unit degree；Ordinate is Circular polarization ratio (AR), unit decibel (dB).According to professional standard, AR < 3dB is
It can regard as circular polarisation effect.Antenna Operation is able to maintain circular polarisation performance under four kinds of different conditions as seen from the figure.
The spoke of XOZ plane and YOZ plane when being bent work along its X-axis for antenna as shown in Figure 6 and Figure 7 under four kinds of states
It penetrates gain pattern, makes a circle in week as the angle value of polar angle, unit is degree；The value of ordinate is polar diameter.It can be seen that almost not having
There is backward radiation, be suitably applied on human body, ensure that the biological safety of human body.And radiation direction is kept under different conditions
Stablize, there is stable directionality.
As shown in Figure 8 and Figure 9, wherein the abscissa of Fig. 8 is angle theta, unit degree；Ordinate is Circular polarization ratio
(AR), the abscissa of unit decibel (dB), Fig. 9 are frequency, unit GHz；Ordinate is return loss (S11), unit decibel
(dB).Antenna can work under flat and bending 80mm state at 915MHz frequency range (S11 < -10dB)；Antenna is flat and curved
It can be worked under bent 150mm, 300mm state at 950MHz frequency range (S11 < -10dB), and can work in the bent state
Higher frequency section, and keep good circular polarisation effect.
As shown in Figure 10 and Figure 11, XOZ plane and YOZ plane when being bent work along its y-axis for antenna under four kinds of states
Radiation gain directional diagram, make a circle as the angle value of polar angle in week, unit is degree；The value of ordinate is polar diameter.Due to large area
Ground plane, it can be seen that almost without backward radiation, most of energy is radiated to Z axis positive direction, is suitably applied on human body,
It ensure that the biological safety of human body.And radiation direction keeps stablizing under different conditions, has stable directionality.
Antenna is in flat, working performance in the state of bending radius 80mm, 150mm, 300mm in summary.In all shapes
Antenna is able to maintain good directionality and safety (i.e. backward radiation energy is extremely low) under state, and antenna is bent along different directions,
In 915MHz and 950MHz, good working performance is shown in differently curved radius respectively, it therefore, can be according to reality
Border situation (bending radius) selects bending direction and communication frequency.
Circular polarization microstrip antenna is buried to a kind of washable flexible wearable medium provided by the present invention above to carry out
It is discussed in detail, used herein a specific example illustrates the principle and implementation of the invention, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to
According to thought of the invention, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification
It should not be construed as limiting the invention.
Herein, relational terms such as first and second and the like be used merely to by an entity or operation with it is another
One entity or operation distinguish, and without necessarily requiring or implying between these entities or operation, there are any this reality
Relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
Claims (9)
1. a kind of washable flexible wearable medium buries circular polarization microstrip antenna, it is characterised in that: including medium substrate (1),
First medium coating (2), second medium coating (3) and conductor patch；Wherein, the conductor patch includes ground plane
(4) it is located between first medium coating (2) and medium substrate (1) with radiation patch (5), the ground plane (4)；The spoke
It penetrates patch (5) to be located between second medium coating (3) and medium substrate (1), and is electrically connected with microstrip line (6)；Described
The conductor patch is wrapped in interior by one dielectric passivation (2), the medium substrate (1) and the second medium coating (3).
2. a kind of washable flexible wearable medium according to claim 1 buries circular polarization microstrip antenna, feature exists
In, the first medium coating (2), the medium substrate (1) and the second medium coating (3) length are identical with width, and
The edge of the conductor patch is in the first medium coating (2), the medium substrate (1) and the second medium coating
(3) have at a distance from fixed in medium edge and with the medium edge.
3. a kind of washable flexible wearable medium according to claim 1 buries circular polarization microstrip antenna, feature exists
In the ground plane (4), the radiation patch (5) and the microstrip line (6) are nano silver material, through 3D ink ejecting method
It is printed upon the surface of the medium substrate (1).
4. a kind of washable flexible wearable medium according to claim 1 buries circular polarization microstrip antenna, feature exists
In the medium substrate (1), the first medium coating (2) and the second medium coating (3) are all made of thermoplastic elastomehc
The 3D printing wire rod NinjaFlex material of property body, by being covered the medium substrate (1), the first medium by FDM method
Cap rock (2) and the second medium coating (3) seamless connection.
5. a kind of washable flexible wearable medium according to claim 1 buries circular polarization microstrip antenna, feature exists
Diagonally open up that there are two chamfering (51) in, the radiation patch (5), and in the radiation patch (5) middle position,
Rectangular channel (52) are offered along same diagonal direction.
6. a kind of washable flexible wearable medium according to claim 5 buries circular polarization microstrip antenna, feature exists
In the long L of the radiation patch (5)p=87.5mm, wide Wp=87.5mm；The width of the chamfering (51) is 9.8mm；The rectangle
A length of 32mm of slot (52).
7. a kind of washable flexible wearable medium according to claim 6 buries circular polarization microstrip antenna, feature exists
In the long L of the microstrip linef=40mm, wide Wf=8mm.
8. a kind of washable flexible wearable medium according to claim 1 buries circular polarization microstrip antenna, feature exists
In height H between the radiation patch (5) and the ground plane (4)2=3.4mm.
9. a kind of washable flexible wearable medium according to claim 1 buries circular polarization microstrip antenna, feature exists
In the ground plane (4) and the microstrip line (6) are all connected with SMA connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811367705.1A CN109524768A (en) | 2018-11-16 | 2018-11-16 | A kind of washable flexible wearable medium buries circular polarization microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811367705.1A CN109524768A (en) | 2018-11-16 | 2018-11-16 | A kind of washable flexible wearable medium buries circular polarization microstrip antenna |
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| Publication Number | Publication Date |
|---|---|
| CN109524768A true CN109524768A (en) | 2019-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811367705.1A Pending CN109524768A (en) | 2018-11-16 | 2018-11-16 | A kind of washable flexible wearable medium buries circular polarization microstrip antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114858823A (en) * | 2022-04-19 | 2022-08-05 | 武汉理工大学 | Microstrip antenna sensor |
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| CN104011935A (en) * | 2011-12-22 | 2014-08-27 | 凯瑟雷恩工厂两合公司 | Patch Antenna Arrangement |
| CN204857948U (en) * | 2015-07-17 | 2015-12-09 | 四川斯威克电子有限责任公司 | Flexible UHF frequency channel microstrip antenna |
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2018
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|---|---|---|---|---|
| EP1630898A1 (en) * | 2004-08-31 | 2006-03-01 | Eidgenössische Technische Hochschule (ETH) | Textile antenna |
| CN104011935A (en) * | 2011-12-22 | 2014-08-27 | 凯瑟雷恩工厂两合公司 | Patch Antenna Arrangement |
| CN204857948U (en) * | 2015-07-17 | 2015-12-09 | 四川斯威克电子有限责任公司 | Flexible UHF frequency channel microstrip antenna |
| CN108292805A (en) * | 2015-10-28 | 2018-07-17 | 罗杰斯公司 | Broad band multilayer medium resonator antenna and the method for manufacturing broad band multilayer medium resonator antenna |
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| Title |
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| CN114858823A (en) * | 2022-04-19 | 2022-08-05 | 武汉理工大学 | Microstrip antenna sensor |
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Application publication date: 20190326 |