CN109755739A - A kind of overall package ultrathin flexible antenna loading AMC structure - Google Patents
A kind of overall package ultrathin flexible antenna loading AMC structure Download PDFInfo
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- CN109755739A CN109755739A CN201910200114.3A CN201910200114A CN109755739A CN 109755739 A CN109755739 A CN 109755739A CN 201910200114 A CN201910200114 A CN 201910200114A CN 109755739 A CN109755739 A CN 109755739A
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Abstract
The invention discloses a kind of overall package ultrathin flexible antennas for loading AMC structure, including monopole antenna, AMC structure and intermediate base bottom；Monopole antenna includes radiating element one, floor one, microstrip feed line and substrate one；AMC structure includes radiating element two, substrate two and floor two；Floor one and radiating element two are bonded in the two sides at intermediate base bottom respectively；The front of substrate one is printed with radiating element one and microstrip feed line, and back up has floor one；Radiating element one is connected with microstrip feed line；The bottom edge of microstrip feed line is connected with the bottom edge of substrate one；The bottom edge on floor one is connect and conllinear with one bottom edge of substrate；The front of substrate two is printed with radiating element two, and back up has floor two；The bottom edge of radiating element two is connect and conllinear with the bottom edge of substrate two.Antenna low section is kept using it with phase reflected phase characteristics using AMC structure as the backboard of omnidirectional radiation monopole antenna, increases to the radiation for deviating from human body surface direction, improves radiation gain and efficiency.
Description
Technical field
The present invention relates to wireless communication field, specially a kind of overall package ultrathin flexible antenna for loading AMC structure.
Background technique
In recent years, as the demand of real-time monitoring human body physiological characteristics data increases, Tele medicine gradually develops
Come.By being wirelessly transferred collected human body physiological parameter, such as blood pressure, heart rate, respiratory rate etc., it is transmitted to terminal device
It is recorded and is analyzed, correct judgement thus is made to human health status.Antenna is as the important device in the communication process
Part, it should have high-gain, high radiation efficiency etc. and stablize excellent radiation characteristic.Since tissue is that a kind of high dielectric is normal
Number, the high material being lost, when antenna works close to human body, the two can be generated and be influenced each other, and one side human body generates antenna
It influences, causes the deterioration of Antenna Operation performance, the electromagnetic wave of another aspect aerial radiation can be detrimental to health.AMC (artificial magnetic
Conductor, Artificial Magnetic Conductor) as a kind of shielding construction antenna may be implemented in human body surface in structure
Normal communication reduces influencing each other between human body and antenna.Since tissue (such as arm) skin surface is not in
Flat state has certain radian, antenna is needed to have flexural property, can be conformal with human body.In addition, antenna loading AMC structure,
It needs to support among the two, being all made of foam in the prior art, (such as Kush Agarwal etc. is in document " Wearable AMC
Backed Near-Endfire Antenna for On-Body Communications on Latex Substrate》
In), foam is not easy of integration, causes antenna entirety section height larger, and the low section overall package for not being able to satisfy antenna is set
Meter.In conclusion designing one kind using flexible material as substrate, the overall package ultrathin flexible antenna of AMC structure is loaded to Guan Chong
It wants.
Summary of the invention
In view of the deficiencies of the prior art, the technical issues of present invention intends to solve is to provide a kind of entirety for loading AMC structure
Encapsulate ultrathin flexible antenna.
It is ultra-thin that the technical solution that the present invention solves the technical problem is to provide a kind of overall package for loading AMC structure
Flexible antennas, it is characterised in that the antenna includes monopole antenna, AMC structure and intermediate base bottom；The monopole antenna and AMC
Structure is bonded in the two sides at intermediate base bottom respectively；
The monopole antenna includes radiating element one, floor one, microstrip feed line and substrate one；The AMC structure includes
Radiating element two, substrate two and floor two；The floor one and radiating element two are bonded in the two sides at intermediate base bottom respectively；It is described
The front of substrate one is printed with radiating element one and microstrip feed line, and back up has floor one；The radiating element one and micro-strip
Feeder line is connected；The bottom edge of microstrip feed line is connected with the bottom edge of substrate one；The bottom edge on floor one connect and is total to one bottom edge of substrate
Line；The front of the substrate two is printed with radiating element two, and back up has floor two；The bottom edge of radiating element two and substrate two
Bottom edge connection and conllinear.
Compared with prior art, the beneficial effects of the invention are that:
(1) this antenna is made of the intermediate base bottom of monopole antenna, AMC structure and support both of them.Monopole antenna is one
Kind omnidirectional antenna, can be to space all directions radiated electromagnetic wave.Using AMC structure as the backboard of monopole antenna, AMC is utilized
The same phase reflected phase characteristics of structure reduce the tissue of high dielectric loss to antenna spoke while keeping antenna low section
The influence of performance is penetrated, while increasing antenna to the radiation for deviating from human body surface direction, reduces the backward radiation of monopole i.e. to people
Omnidirectional radiation is become directed radiation by the radiation of body, realizes that antenna in the directional transmissions of human body surface, improves radiation gain and spoke
Penetrate efficiency.
(2) by adjust the center patch of monopole antenna, upper patch, left patch and right patch width, make monopole
Antenna Operation frequency range is near 2.45GHz.By adjusting the radiating element of AMC structure and the thickness of substrate, change its equivalent electricity
Sense and capacitor, and then change its working frequency, generate it with mutually reflection in 2.45GHz frequency environs to incidence wave,
Realize that the reflected phase at resonance frequency 2.45GHz is 0 °.
(3) no longer completely cut off using foam between monopole antenna and AMC structure, but utilize and monopole antenna and
The same base material of AMC structure is filled, and eliminates the air gap, between reducing between monopole antenna and AMC structure
Gap (can be reduced to 2mm), effectively reduce the section height (section height is down to 4.14mm) of antenna, while by monopole antenna
Identical size is designed to AMC structure, is conducive to the realization of overall package, convenient for integrated and peace of the antenna on wearable device
Dress.
(4) monopole antenna and AMC structure do not use the hard substrates such as traditional FR-4, but use polytetrafluoroethyl-ne
Alkene is base material, can directly be pasted on human body surface, conformal well with human body.
(5) the maximum specific absorption rate (Specific that 1g and 10g tissue absorbs aerial radiation electromagnetic wave is calculated
Absorption Rate, SAR) value is respectively 1.293W/Kg and 0.5934W/Kg, and which is far smaller than Federal Communication committee
The standard that member's meeting (FCC) and the international Non-ionizing radiation protection committee (ICNIRP) are formulated, meets human-body safety communicating requirement.And
The monopole antenna of AMC structure is not loaded, and the maximum SAR value that 1g and 10g tissue absorbs aerial radiation electromagnetic wave is respectively
13W/Kg and 7.909W/Kg, the value have exceeded FCC and ICNIRP standard, do not meet human-body safety communicating requirement.
Detailed description of the invention
Fig. 1 is the antenna overall structure schematic front view of an embodiment of the present invention.
Fig. 2 is the antenna overall structure left view schematic diagram of an embodiment of the present invention.
Fig. 3 is the monopole antenna schematic front view of an embodiment of the present invention.
Fig. 4 is the monopole antenna schematic rear view of an embodiment of the present invention.
Fig. 5 is the monopole antenna left view schematic diagram of an embodiment of the present invention.
Fig. 6 is the AMC structure of the main view of an embodiment of the present invention.
Fig. 7 is the AMC structure left view schematic diagram of an embodiment of the present invention.
Fig. 8 is the return loss S of the antenna in free space of an embodiment of the present invention11Curve graph；
Fig. 9 is the E surface radiation directional diagram of the antenna in free space of an embodiment of the present invention；
Figure 10 is the H surface radiation directional diagram of the antenna in free space of an embodiment of the present invention；
Figure 11 is that the antenna of an embodiment of the present invention is bent in free space along y-axis, and bending radius r is become from 30mm
120mm, when step-length is 10mm, the return loss S of antenna11Curve graph；
Figure 12 is that the antenna of an embodiment of the present invention is bent in free space along y-axis, and bending radius r is become from 30mm
120mm, when step-length is 10mm, the E surface radiation directional diagram in 2.45GHz；
Figure 13 is that the antenna of an embodiment of the present invention is bent in free space along y-axis, and bending radius r is become from 30mm
120mm, when step-length is 10mm, the H surface radiation directional diagram in 2.45GHz；
Figure 14 is that the antenna of an embodiment of the present invention and monopole antenna are damaged in 2.45GHz in the echo of human body surface
Consume S11Curve graph；
Figure 15 be an embodiment of the present invention antenna and monopole antenna in 2.45GHz in the face the E spoke of human body surface
Penetrate directional diagram；
Figure 16 be an embodiment of the present invention antenna and monopole antenna in 2.45GHz in the face the H spoke of human body surface
Penetrate directional diagram；
Figure 17 tests antenna return loss S using vector network analyzer for an embodiment of the present invention11Result figure；
Figure 18 be an embodiment of the present invention monopole antenna in 2.45GHz in the return loss S of free space11
Figure；
Figure 19 be an embodiment of the present invention monopole antenna in 2.45GHz in the E surface radiation direction of free space
Figure；
Figure 20 be an embodiment of the present invention monopole antenna in 2.45GHz in the H surface radiation direction of free space
Figure；
Figure 21 is the reflected phase figure of the AMC structure of an embodiment of the present invention；
Figure 22 is the antenna pictorial diagram of an embodiment of the present invention.
In figure: 1, radiating element one；2, floor one；, 3, microstrip feed line；4, substrate one；5, radiating element two；6, substrate
Two；7, floor two；8, intermediate base bottom；11, center patch；12, upper patch；13, left patch；14, right patch；51, upper left patch；
52, upper right patch；53, bottom patch；
Specific embodiment
Specific embodiments of the present invention are given below.Specific embodiment is only used for that present invention be described in more detail, unlimited
The protection scope of the claim of this application processed.
The present invention provides a kind of overall package ultrathin flexible antenna (abbreviation antennas, referring to Fig. 1-for loading AMC structure
7), it is characterised in that the antenna includes monopole antenna, AMC structure and intermediate base bottom 8；The monopole antenna and AMC structure
It is bonded in the two sides at intermediate base bottom 8 respectively；
The monopole antenna includes radiating element 1, floor 1, microstrip feed line 3 and substrate 1；The AMC structure
Including radiating element 25, substrate 26 and floor 27；
The floor 1 and radiating element 25 are bonded in the two sides at intermediate base bottom 8 respectively；The front print of the substrate 1
Brushed with radiating element 1 and microstrip feed line 3, back up has floor 1；The radiating element 1 is connected with microstrip feed line 3；
The bottom edge of microstrip feed line 3 is connected with the bottom edge of substrate 1；Microstrip feed line 3 is located at one 1 lower section of radiating element；The bottom edge on floor 1
It is connect with one 4 bottom edge of substrate and conllinear；The front of the substrate 26 is printed with radiating element 25, and back up has floor two
7；The bottom edge of radiating element 25 is connect and conllinear with the bottom edge of substrate 26；
The radiating element 1 is made of center patch 11, upper patch 12, left patch 13 and right patch 14；The upper patch
Piece 12, left patch 13 and right patch 14 are connected on the top margin, left side and right edge of center patch 11；Center patch 11
Bottom edge be connected with microstrip feed line 3；It slots among center patch 11, forms rectangle ring structure；Radiating element 25 is by upper left patch
51, upper right patch 52 and bottom patch 53 form；Upper left patch 51, upper right patch 52 and bottom patch 53 are mutually not connected to；
Upper left patch 51 and upper right patch 52 are located at the top-left position and upper-right position of substrate 26, not with the edge of substrate 26
Connection；The bottom edge of bottom patch 53 is connect and conllinear with 26 bottom edge of substrate；
Preferably, floor 27, substrate 1 are identical with the size of substrate 26.Intermediate base bottom 8 with a thickness of one 4 He of substrate
Twice of substrate 26, length and width are identical as substrate 1 and substrate 26.The length on floor 1 is identical as the length of substrate 1, wide
It spends of same size with microstrip feed line 3.Radiating element 1, microstrip feed line 3, floor 1, radiating element 25 and floor 27
Thickness is identical.
Preferably, the top margin of upper patch 12 is connected with the top margin of substrate 1；The upper patch 12, left patch 13 and right patch
Piece 14 is connected on the center of the top margin of center patch 11, left side and right edge；11 center of center patch
Fluting forms rectangle ring structure, and the length and width of slot is respectively the half of the length and width of center patch 11；Upper patch 12
Length be center patch 11 length half；Left patch 13 is identical with the size of right patch 14, and length and width is respectively
The half of the length and width of center patch 11；
Preferably, upper left patch 51 and upper right patch 52 are the identical square of size；Upper left patch 51 and bottom patch
It is 53 distance, all the same at a distance from the top margin and left side of substrate 26, at a distance from upper right patch 52 be and substrate 26
Twice of the distance of top margin；Upper right patch 52 is at a distance from bottom patch 53, phase at a distance from the top margin with substrate 26 and right edge
Together；The size of bottom patch 53 is identical as floor 1.
Preferably, the center patch 11, upper patch 12, left patch 13, right patch 14, upper left patch 51, upper right patch
52 and bottom patch 53 be rectangular metal patch, metal is copper；
Preferably, the bottom edge central axes of the central axes of radiating element 1, the central axes of microstrip feed line 3 and substrate 1 are total
Line；
Preferably, the substrate 1, substrate 26 and the shape at intermediate base bottom 8 be rectangle, use relative dielectric constant for
The 3.5 polytetrafluoroethylene (PTFE) flexible material with bio-compatibility.
It is rectangular long side with the equidirectional side of horizontal plane in the present invention.
Embodiment
L in the present embodiment1=15mm, L2=11.25mm, L3=22.5mm, L4=7.5mm, W1=60mm, W2=8.5mm,
Fw=3.25mm, h0=0.035mm, h1=1mm, h2=2mm, n=0.3mm, a=30mm.
The shape of substrate 1, substrate 26 and intermediate base bottom 8 be rectangle, use relative dielectric constant for 3.5 polytetrafluoro
The size of ethylene flexible material, substrate 1 and substrate 26 is 60mm × 45mm × 1mm.The size at intermediate base bottom 8 be 60mm ×
45mm×2mm.Central axes, the central axes of microstrip feed line 3 of radiating element 1 are conllinear with the bottom edge central axes of substrate 1.Floor
27 size is 60mm × 45mm × 0.035mm.The size on floor 1 is 60mm × 15mm × 0.035mm.Microstrip feed line 3
Having a size of 3.25mm × 15mm × 0.035mm.The thickness of radiating element 1 and radiating element 25 is 0.035mm.
The top margin of upper patch 12 is connected with the top margin of substrate 1；The upper patch 12, left patch 13 and right patch 14 are distinguished
It is connected on the center of the top margin of center patch 11, left side and right edge；11 center of center patch fluting, forms
Rectangle ring structure；The length and width of center patch 11 are 17mm × 22.5mm, and the length and width of slot are 8.5mm × 11.25mm；The length of patch 12
Width is 8.5mm × 7.5mm；The length and width of left patch 13 and right patch 14 are 8.5mm × 11.25mm；
The length and width of upper left patch 51 and upper right patch 52 are 29.4mm × 29.4mm；Upper left patch 51 and bottom patch 53
Distance with the top margin and left side of substrate 26 at a distance from is 0.3mm, is 0.6mm at a distance from upper right patch 52；Upper right patch
Piece 52 at a distance from bottom patch 53, at a distance from the top margin with substrate 26 and right edge be 0.3mm；The length of bottom patch 53
Width is 60mm × 15mm.
It can be obtained by Fig. 8, at 2.45GHz, the S of antenna11Value is lower than -10dB, is suitable for ISM band.
It can be obtained by Fig. 9, in 2.45GHz, directional diagram becomes hemispherical by the figure of eight, and than increasing, gain increases for front and back.
It can be obtained by Figure 10, in 2.45GHz, directional diagram becomes directed radiation by round omnidirectional radiation, and back lobe is smaller, main lobe
Larger, front and back also increases than enhancing, radiation gain.
It can be obtained by Figure 11, with the increase of bending radius, the working frequency and bandwidth of operation of antenna are basically unchanged, and are shown curved
Song is little to the return loss effects of antenna.
It can be obtained by Figure 12, for antenna with the increase of bending radius, antenna pattern is still substantially at semicircle, greatest irradiation side
To human body side is deviated from, front and back ratio and radiation gain are basically unchanged, and directional diagram essentially coincides, and show bending to the face antenna E spoke
Projection is rung little.Figure 13 illustrates to be bent little to the radiation effect in the face antenna H.To sum up show antenna in certain bending range,
It is able to maintain that its radiation characteristic, can be realized conformal with human body.
It can be obtained by Figure 14, in human body surface, antenna remains to maintain good impedance matching in 2.45GHz or so, and monopole
Sub-antenna bandwidth of operation in human body surface changes significantly, and illustrates that human body is affected to antenna.
It loads the radiation gain of AMC structural antenna it can be seen from Figure 15 and Figure 16 to become larger, front and back shows that AMC is tied than enhancing
Structure can effectively improve antenna in human body surface radiance.
Figure 17 use vector network analyzer model Keysight N5244A, in free space to antenna into
Row test, the S tested11Curve and simulation result coincide substantially.
It can be obtained by Figure 18, monopole antenna realizes good resistance in 2.45GHz, can work normally.
It can be obtained by Figure 19, in 2.45GHz, directional diagram is in the figure of eight, and monopole antenna has bidirectional radiation characteristic.
It can be obtained by Figure 20, in 2.45GHz, directional diagram is approximately circle, illustrates that monopole antenna has omnidirectional radiation special
Property.
It can be obtained by Figure 21, near 2.45GHz, the reflection of AMC structure is mutually 0 °, and is had in certain frequency range with opposite
Penetrate phase.
Can be obtained by Figure 22, the antenna can be used impedance be 50 Ω sub-miniature A connector as feed port.
The present invention does not address place and is suitable for the prior art.
Claims (8)
1. it is a kind of load AMC structure overall package ultrathin flexible antenna, it is characterised in that the antenna include monopole antenna,
AMC structure and intermediate base bottom；The monopole antenna and AMC structure are bonded in the two sides at intermediate base bottom respectively；
The monopole antenna includes radiating element one, floor one, microstrip feed line and substrate one；The AMC structure includes radiation
Unit two, substrate two and floor two；The floor one and radiating element two are bonded in the two sides at intermediate base bottom respectively；The substrate
One front is printed with radiating element one and microstrip feed line, and back up has floor one；The radiating element one and microstrip feed line
It is connected；The bottom edge of microstrip feed line is connected with the bottom edge of substrate one；The bottom edge on floor one is connect and conllinear with one bottom edge of substrate；Institute
The front for stating substrate two is printed with radiating element two, and back up has floor two；The bottom edge of radiating element two and the bottom of substrate two
Side connection and conllinear.
2. the overall package ultrathin flexible antenna of load AMC structure according to claim 1, it is characterised in that floor two,
Substrate one is identical with the size of substrate two；Twice with a thickness of substrate one and substrate two at intermediate base bottom, length and width and substrate one and
Substrate two is identical；The length on floor one is identical as the length of substrate one, width and microstrip feed line it is of same size；Radiating element
One, microstrip feed line, floor one, radiating element two are identical with the thickness on floor two.
3. the overall package ultrathin flexible antenna of load AMC structure according to claim 1, it is characterised in that the radiation
Unit one is made of center patch, upper patch, left patch and right patch；The upper patch, left patch and right patch are separately connected
On the top margin, left side and right edge of center patch；The bottom edge of center patch is connected with microstrip feed line；It is opened among center patch
Slot forms rectangle ring structure；Radiating element two is made of upper left patch, upper right patch and bottom patch；Upper left patch, upper right patch
Piece and bottom patch are mutually not connected to；Upper left patch and upper right patch are located at top-left position and the upper right position of substrate two
It sets, the edge with substrate two is not connected to；The bottom edge of bottom patch is connect and conllinear with two bottom edge of substrate.
4. the overall package ultrathin flexible antenna of load AMC structure according to claim 3, it is characterised in that upper patch
Top margin is connected with the top margin of substrate one；The upper patch, left patch and right patch are connected to the top margin of center patch, left side
On side and the center of right edge；Center patch center fluting forms rectangle ring structure, the length and width difference of slot
For the half of the length and width of center patch；The length of upper patch is the half of the length of center patch；Left patch and right patch
The size of piece is identical, and length and width is respectively the half of the length and width of center patch.
5. the overall package ultrathin flexible antenna of load AMC structure according to claim 3, it is characterised in that upper left patch
It is the identical square of size with upper right patch；Top margin and left side of the upper left patch at a distance from bottom patch, with substrate two
Distance it is all the same, be twice at a distance from the top margin of substrate two at a distance from upper right patch；Upper right patch and bottom patch
Distance, identical at a distance from the top margin with substrate two and right edge；The size of bottom patch is identical as floor one.
6. the overall package ultrathin flexible antenna of load AMC structure according to claim 3, it is characterised in that the center
Patch, upper patch, left patch, right patch, upper left patch, upper right patch and bottom patch are rectangular metal patch.
7. the overall package ultrathin flexible antenna of load AMC structure according to claim 1, it is characterised in that radiating element
One central axes, the central axes of microstrip feed line are conllinear with the bottom edge central axes of substrate one.
8. the overall package ultrathin flexible antenna of load AMC structure according to claim 1, it is characterised in that the substrate
One, substrate two and the shape at intermediate base bottom are rectangle, use relative dielectric constant for 3.5 polytetrafluoroethylene material.
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| CN201910200114.3A CN109755739A (en) | 2019-03-15 | 2019-03-15 | A kind of overall package ultrathin flexible antenna loading AMC structure |
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Cited By (1)
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| CN110277625A (en) * | 2019-06-27 | 2019-09-24 | 江苏维航精仪科技有限公司 | A kind of overall package ultrathin flexible antenna loading AMC structure |
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Application publication date: 20190514 |
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