CN110444873A - A kind of wearable button antenna for body area network - Google Patents
A kind of wearable button antenna for body area network Download PDFInfo
- Publication number
- CN110444873A CN110444873A CN201910654229.XA CN201910654229A CN110444873A CN 110444873 A CN110444873 A CN 110444873A CN 201910654229 A CN201910654229 A CN 201910654229A CN 110444873 A CN110444873 A CN 110444873A
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- antenna
- button
- radiation patch
- area network
- body area
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- 239000000523 sample Substances 0.000 claims abstract description 47
- 230000005855 radiation Effects 0.000 claims abstract description 44
- 239000000758 substrate Substances 0.000 claims description 15
- 239000004744 fabric Substances 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000004753 textile Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 238000005452 bending Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/273—Adaptation for carrying or wearing by persons or animals
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- Waveguide Aerials (AREA)
Abstract
The invention discloses a kind of wearable button antennas for body area network, including radiation patch, button layer, froth bed and the floor successively arranged from top to bottom；The antenna further includes feed probes and grounding probe, metallic vias is distributed on button layer and froth bed, the inner core of feed probes is connect by metallic vias with radiation patch, inner core is placed on the line of symmetry of radiation patch, the outer surface of feed probes is connect with floor, for realizing Antenna Impedance Matching and support button layer；Grounding probe is located on the line of symmetry of radiation patch, for introducing shunt inductance, so that the antenna is able to achieve impedance matching, connects floor by one end of metallic vias grounding probe, the other end connects radiation patch.The antenna compared with being generally worn by formula antenna, have many advantages, such as structure it is simple, with wide, stability is good, can be used for human body plurality of positions, at low cost.
Description
Technical field
The present invention relates to antenna technical fields, and in particular to a kind of wearable button antenna for body area network.
Background technique
In recent years, with the development of radio network technique, the concept of wireless body area network is proposed, i.e., using human body as center structure
At a wireless network, it is worn on human body or is implanted into the physiologic information of the electronic equipment acquisition human body of human body, access wireless body area
Net monitors the health condition of human body in real time, preferably offer Health Care Services.
Antenna is to receive and send the essential element of data in wireless network, for being applied to wearing for human body body area network
Formula antenna is worn, due to the complexity of human body electromagnetic environment, brings huge challenge to wearable Antenna Design.Act on human body
Position it is different, the performance of antenna also can difference, the design of antenna need to realize good stability, miniaturization, Low emissivity and
The requirement of comfort, while the bandwidth of antenna, directional diagram, gain meet design requirement.Wearable antennas many at present, which use, to be knitted
For object as medium substrate, this design is conformal with the clothes of human body, and Antenna Design is made to have certain comfort, but this antenna
Design generally uses the structure of microstrip antenna, and frequency band is narrow, with the bending of clothing, can also have an impact to antenna performance.It is another
Wearable antenna uses the structure of button, and button antenna also can be conformal with human body clothing well, and button itself is using hard
Medium substrate, robustness is more preferable, and radiation efficiency is higher, and more easy to manufacture, and cost is lower.
Summary of the invention
In order to solve the problems in the existing technology and insufficient, the present invention proposes a kind of wearable knob for body area network
Antenna is detained, has many advantages, such as that strong robustness, bandwidth, at low cost and radiation efficiency are high.
The purpose of the present invention is realized at least through one of following technical solution.
The present invention provides a kind of wearable button antennas for body area network, including the radiation successively arranged from top to bottom
Patch, button layer, froth bed and floor；Radiation patch is attached to the upper surface of button layer, and radiation patch has line of symmetry；Button
There is one layer of airspace between layer and froth bed；Floor is attached to the lower surface of froth bed；The antenna further includes feed probes
And grounding probe, metallic vias is distributed on button layer and froth bed, the inner core of feed probes is pasted by metallic vias and radiation
Piece connection, inner core are placed on the line of symmetry of radiation patch, and the outer surface of feed probes is connect with floor, for realizing antenna resistance
Anti- matching and support button layer；Grounding probe is located on the line of symmetry of radiation patch, for introducing shunt inductance, makes the antenna
It is able to achieve impedance matching, floor is connected by one end of metallic vias grounding probe, the other end connects radiation patch.The antenna
Garment surface is fixed on by feed probes and short circuit metal probe.
Preferably, the button layer is made of medium substrate, and medium substrate is the mm of high H1=1.5mm ~ 1.6, and radius is
The cylindrical body of 7.6mm ~ 7.9mm.
Preferably, radiation patch includes resonant ring and round minor matters；Resonant ring includes outer ring and inner ring, and inner ring is placed in outer ring
Interior, radius, that is, outer diameter of outer ring is 7.1mm ~ 7.5mm, and radius, that is, internal diameter of inner ring is 5.35mm ~ 5.75mm, and inner ring has one
Notch, the width of notch are 0.3mm ~ 0.7mm；Round minor matters are set in inner ring, and round minor matters are connected with inner ring in incision,
For radiated electromagnetic wave, the radius of round minor matters is the mm of 4mm ~ 4.4.
Preferably, the froth bed and human body clothing are conformal, the height of the air space between froth bed and button layer
H2 is 2mm ~ 3mm；The height H3 of froth bed is 2.5mm ~ 3.5mm, and long and width is 80mm × 80mm ~ 90mm × 90mm.
Preferably, floor is made of conductive textile fabric, and the height of conductive textile fabric is 0.17mm ~ 0.19mm, and long and width is
80mm×80mm~90mm×90mm。
Preferably, by the way of coaxial feed, the appearance of feed probes connects the antenna with floor, and the feed is visited
The inner core of needle is connected with radiation patch, positioned at the top edge of radiation patch, feeds to antenna；The grounding probe is radius
The short circuit metal probe of 0.3mm ~ 0.5mm, grounding probe are connected with the round minor matters of radiation patch, positioned at the round minor matters
Lower edge；Grounding probe and the spacing distance of feed probes are 8.1mm ~ 8.5mm.
Preferably, button layer uses FR4 medium plate, relative dielectric constant 4.4, loss angle tangent 0.02；It is shown
Froth bed uses eva foam substrate, relative dielectric constant 1.17, loss angle tangent 0.002.
Preferably, button layer is located at the center on floor.
Preferably, the whole height of the antenna is 6.27mm ~ 8.25mm.
Preferably, the work ISM band of the antenna is 5.8 GHz, and the impedance bandwidth of 10 dB is 5.63-6.17 GHz,
Absolute bandwidth is 0.54 GHz, relative bandwidth 9.3%.
Compared to the prior art, the invention has the following advantages:
(1) wearable antenna is designed using button structure, it is conformal with human body clothes, usual fabric microstrip antenna is compared, bandwidth is more
Width, antenna can still ensure that normal work in the case where receiving body effect's frequency deviation.
(2) upper layer button is made of FR4 medium substrate, and froth bed uses eva foam substrate, in entire wearable antenna
Material selection, at low cost, the processing is simple.
(3) floor area is more much larger than button level product, and antenna and human body has been isolated, has reduced the coupling of human body and antenna,
Keep antenna performance unaffected.
(4) froth bed medium used by is flexible material, flexible, and button layer is hard material using medium substrate,
It is capable of fixing in garment surface, floor area is big, and good radiation characteristic, knob can be still kept under froth bed bending condition in antenna
Layer is detained in the different location of human body, bending degree is different, and antenna provided by the invention can act on the plurality of positions of human body.
Detailed description of the invention
Fig. 1 a is a kind of schematic diagram for wearable button antenna for body area network that embodiment provides；
Fig. 1 b is a kind of top view for wearable button antenna for body area network that embodiment provides；
Fig. 1 c is a kind of overlooking structure figure of the radiation patch for wearable button antenna for body area network that embodiment provides；
Fig. 2 is a kind of reflection coefficient analogous diagram for wearable button antenna for body area network that embodiment provides；
Fig. 3 is a kind of reflection coefficient emulation for the wearable button antenna of body area network on manikin that embodiment provides
Figure；
Fig. 4 is a kind of reflection coefficient emulation for the wearable button antenna of body area network in bending that embodiment provides
Figure.
Specific embodiment
With reference to the accompanying drawings and embodiments, the present invention is described in more detail, but embodiments of the present invention are unlimited
In this.
Embodiment
A kind of wearable button antenna for body area network is present embodiments provided, as shown in Figure 1a, including from top to bottom
Radiation patch 2, button layer 1, froth bed 3 and the floor 4 successively arranged；Radiation patch 2 is attached to the upper surface of button layer 1, spoke
Patch 2 is penetrated with line of symmetry；There is one layer of airspace between button layer 1 and froth bed 3；Floor 4 is attached to the following table of froth bed 3
Face；The antenna further includes feed probes 5 and grounding probe 6, and metallic vias is distributed on button layer 1 and froth bed 3, and feed is visited
The inner core of needle 5 is connect by metallic vias with radiation patch 2, and inner core is placed on the line of symmetry of radiation patch 2, feed probes 5
Outer surface connect with floor 4, for realizing Antenna Impedance Matching and support button layer 1；Grounding probe 6 is located at radiation patch
On line of symmetry, for introducing shunt inductance, so that the antenna is able to achieve impedance matching, pass through the one of metallic vias grounding probe 6
End connection floor 4, the other end connect radiation patch 2.
The button layer 1 is made of medium substrate, and the material of medium substrate is FR-4, relative dielectric constant 4.4, loss
Angle is just cut to 0.02, and medium substrate is the mm of high H1=1.6, and radius is the cylindrical body of 7.5 mm.
As shown in fig. 1b and fig. lc, radiation patch 2 includes split ring resonator 7 and round minor matters 8；The outer ring of resonant ring 7
Radius, that is, outer diameter is 7.3 mm, and radius, that is, internal diameter of inner ring is 5.55 mm, and resonant ring has a notch, and the width of notch is
0.5 mm；Round minor matters 8 are set in inner ring, and round minor matters 8 are connected with inner ring in incision, are used for radiated electromagnetic wave, round
The radius of minor matters 8 is 4.2 mm.The resonant ring and round minor matters main function are to make antenna resonance in 5.8GHz, effectively spoke
Radio magnetic energy.
The froth bed 3 and human body clothing are conformal, and froth bed 3 is eva foam substrate, relative dielectric constant 1.17, damage
Consumption angle is just cut to 0.002.The height H2 of air space between froth bed 3 and button layer 1 is 2mm；The height H3 of froth bed 3
For 3mm, long and width is the mm of 80 mm × 80.Floor 4 is conductive fabric layer, is highly 0.17mm, and long and width is 80 mm × 80
Mm, conductivity are 1.18 × 105 S/m, the main function on the floor 4 are isolated antennas and human body, reduce SAR value, make simultaneously
Antenna performance is not influenced by human body.
The feed probes 5 use characteristic impedance for 50 coaxial line, and inner core radius is 0.64 mm, and appearance radius is
1.5 mm, inner core are connected with radiation patch, and positioned at the top edge of radiation patch 2, appearance is connected with floor, present antenna
Electricity；The grounding probe 6 is the short circuit metal probe of radius 0.4mm, and grounding probe is located at the lower edge of round minor matters 8, short circuit
Probe 6 and the spacing distance of feed probes 5 are 8.3mm, since the distance of radiation patch 2 to feeding point is less than the 1/ of resonance frequency
4 wavelength, entire antenna structure are in capacitive, introduce shunt inductance by introducing grounding probe, realize impedance matching.
The relative dielectric constant of button layer 1 is 4.4, loss angle tangent 0.02；The relative dielectric constant of shown froth bed 3
It is 1.17, loss angle tangent 0.002.Button layer 1 is located at the center on floor 4.The height of the antenna is 6.77mm.
As shown in Fig. 2, the work ISM band of antenna provided in this embodiment is 5.8 GHz, the impedance bandwidth of 10 dB is
5.63-6.17 GHz, absolute bandwidth are 0.54 GHz, and 5.8 ghz bands of ISM, band can be completely covered in relative bandwidth 9.3%
It is wide, it can guarantee that antenna in the case where being influenced by environment, such as the movement of human body, still ensures that antenna on working frequency range
Performance makes antenna have more stability.
Fig. 3 is that the wearable button antenna provided in this embodiment for body area network is placed on the reflection above manikin
Coefficient analogous diagram since floor 4 relative radiation patch, 2 areas are much larger, can be effectively isolated human body and antenna as seen from the figure,
Therefore in human body, performance is substantially unaffected, and can operate effectively in 5.8 GHz-ISM frequency ranges for antenna emulation.The wearing
The radiation efficiency of formula button antenna can reach 97%.
Reflection coefficient such as Fig. 4 institute provided in this embodiment for the wearable antenna of body area network in curved situation
Show, since the operating position that antenna is placed is different, bending situation is also different, and bending radius is smaller, the effective area on floor
It reduces, performance is bigger by being influenced, which still ensures that in the case where bending radius 100 mm and 50 mm entire
S11 parameter is in-10 dB or less in the ISM band of 5.725-5.875 GHz.
The foregoing is only a preferred embodiment of the present invention, not does restriction in any form to the present invention.It is all
Any equivalent variation that those skilled in the art makes above-described embodiment using technical solution of the present invention is modified or is drilled
Become etc., all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of wearable button antenna for body area network, which is characterized in that including the radiation patch successively arranged from top to bottom
Piece (2), button layer (1), froth bed (3) and floor (4)；Radiation patch (2) is attached to the upper surface of button layer (1), radiation patch
Piece (2) has line of symmetry；There is one layer of airspace between button layer (1) and froth bed (3)；Floor (4) is attached to froth bed (3)
Lower surface；The antenna further includes feed probes (5) and grounding probe (6), is distributed on button layer (1) and froth bed (3)
The inner core of metallic vias, feed probes (5) is connect by metallic vias with radiation patch (2), and inner core is placed on radiation patch (2)
Line of symmetry on, the outer surface of feed probes (5) is connect with floor (4), for realizing Antenna Impedance Matching and support button layer
(1)；Grounding probe (6) is located on the line of symmetry of radiation patch, for introducing shunt inductance, the antenna is made to be able to achieve impedance
Match, floor (4) is connected by one end of metallic vias grounding probe (6), the other end connects radiation patch (2), and the antenna is logical
It crosses feed probes (5) and grounding probe (6) is fixed on human body garment surface.
2. according to claim 1 be used for body area network wearable button antenna, which is characterized in that the button layer (1) by
Medium substrate is constituted, and medium substrate is high H1=1.5mm ~ 1.6mm, and radius is the cylindrical body of 7.6mm ~ 7.9mm.
3. being used for the wearable button antenna of body area network according to claim 1, which is characterized in that radiation patch (2) includes
Resonant ring (7) and round minor matters (8)；Resonant ring (7) includes outer ring and inner ring, and inner ring is placed in outer ring, and the radius of outer ring is i.e. outer
Diameter is 7.1mm ~ 7.5mm, and radius, that is, internal diameter of inner ring is 5.35mm ~ 5.75mm, and inner ring has a notch, and the width of notch is
0.3mm~0.7mm；Round minor matters (8) are set in inner ring, and round minor matters (8) are connected with inner ring in incision, are used for radiation electric
Magnetic wave, the radius of round minor matters (8) are the mm of 4mm ~ 4.4.
4. according to claim 1 be used for body area network wearable button antenna, which is characterized in that the froth bed (3) with
Human body clothing is conformal, and the height H2 of the air space between froth bed (3) and button layer (1) is 2mm ~ 3mm；Froth bed (3)
Height H3 be 2.5mm ~ 3.5mm, long and width is 80mm × 80mm ~ 90mm × 90mm.
5. being used for the wearable button antenna of body area network according to claim 1, which is characterized in that floor (4) are spun by conduction
Fabric composition, the height of conductive textile fabric are 0.17mm ~ 0.19mm, and size is 80mm × 80mm ~ 90mm × 90mm.
6. being used for the wearable button antenna of body area network according to claim 1, which is characterized in that the antenna is using coaxial
The appearance of the mode of feed, the feed probes (5) connects with floor (4), the inner core and radiation patch of the feed probes (5)
(2) it is connected, positioned at the top edge of radiation patch, antenna is fed；The grounding probe (6) is radius 0.3mm ~ 0.5mm
Short circuit metal probe, grounding probe (6) is connected with the round minor matters of radiation patch (2), positioned at the following of the round minor matters
Edge；Grounding probe (6) and the spacing distance of feed probes (5) are 8.1mm ~ 8.5mm.
7. being used for the wearable button antenna of body area network according to claim 1, which is characterized in that button layer (1) uses FR4
Medium plate, the relative dielectric constant are 4.4, loss angle tangent 0.02；Shown froth bed (3) uses eva foam substrate, should
Relative dielectric constant is 1.17, loss angle tangent 0.002.
8. being used for the wearable button antenna of body area network according to claim 1, which is characterized in that button layer (1) is located at ground
At the center of plate (4).
9. being used for the wearable button antenna of body area network according to claim 1, which is characterized in that the height of the antenna is
6.27mm~8.25mm。
10. being used for the wearable button antenna of body area network according to claim 1, which is characterized in that the work of the antenna
ISM band is 5.8 GHz, and the impedance bandwidth of 10 dB has 5.63-6.17 GHz, and absolute bandwidth has 0.54 GHz, and relative bandwidth is
9.3%。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910654229.XA CN110444873A (en) | 2019-07-19 | 2019-07-19 | A kind of wearable button antenna for body area network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910654229.XA CN110444873A (en) | 2019-07-19 | 2019-07-19 | A kind of wearable button antenna for body area network |
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| Publication Number | Publication Date |
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| CN110444873A true CN110444873A (en) | 2019-11-12 |
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| CN201910654229.XA Pending CN110444873A (en) | 2019-07-19 | 2019-07-19 | A kind of wearable button antenna for body area network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904103A (en) * | 2021-09-08 | 2022-01-07 | 南京信息工程大学 | Dual-band dual-mode button antenna |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210430098U (en) * | 2019-07-19 | 2020-04-28 | 华南理工大学 | Wearable button antenna for body area network |
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2019
- 2019-07-19 CN CN201910654229.XA patent/CN110444873A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210430098U (en) * | 2019-07-19 | 2020-04-28 | 华南理工大学 | Wearable button antenna for body area network |
Non-Patent Citations (1)
| Title |
|---|
| HU XIAOMU等: "Wearable Button Antenna for Dual-Band WLAN Applications With Combined on and off-Body Radiation Patterns", 《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》, vol. 65, no. 3, pages 1384 - 1387 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904103A (en) * | 2021-09-08 | 2022-01-07 | 南京信息工程大学 | Dual-band dual-mode button antenna |
| CN113904103B (en) * | 2021-09-08 | 2023-05-16 | 南京信息工程大学 | Dual-band dual-mode button antenna |
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