CN207611867U - A kind of medical implantable antenna being operated in ISM band - Google Patents
A kind of medical implantable antenna being operated in ISM band Download PDFInfo
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- CN207611867U CN207611867U CN201721764974.2U CN201721764974U CN207611867U CN 207611867 U CN207611867 U CN 207611867U CN 201721764974 U CN201721764974 U CN 201721764974U CN 207611867 U CN207611867 U CN 207611867U
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- 239000000758 substrate Substances 0.000 claims abstract description 21
- 230000005855 radiation Effects 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims description 8
- 239000004642 Polyimide Substances 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002513 implantation Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
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Abstract
The utility model is related to a kind of medical implantable antennas being operated in ISM band, including radiation patch, microstrip feed line, ground plane and medium substrate, it is characterized in that：The radiation patch is made of upper and lower two round intersections, it is lower it is round it is upper using two circular circle center line connectings be axial symmetry setting there are four arc corner cut, the arc corner cut cuts a rectangle composition for lower circular edge；The distance in the arc corner cut bottom edge being located above to the lower round center of circle is not equal to underlying arc corner cut top margin to the distance in the lower round center of circle, and the distance of four arc corner cuts to two circular circle center line connectings is equal；The microstrip feed line circular bottom under is closely coupled；The ground plane generally rectangle, the both upper ends thereof corner cut structure having the same of rectangle, the vertical length of side of corner cut structure are equal to the width of ground plane, and the width of ground plane is medium substrate width 1/10~1/5.The utility model is simple in structure and novel, and loss is low, and bandwidth is wider, and the scope of application is wider.
Description
Technical field
The utility model belongs to field of antenna more particularly to a kind of medical implantable antenna being operated in ISM band.
Background technology
Currently, the increasing problem of an aging population has become the difficulty of the countries in the world facing including China
Topic, aging process will be along with the demand growth of Health Care Services industry, during especially China Today has been initially entered into
Deng income country, and population base is big, huge to the requirements of health care of high quality, and wireless biologic medical is since it is using just
Profit becomes the main trend of current and future medical treatment development.From the point of view of current present Research, research and development low-loss, miniaturization
Still there are prodigious difficulties for wireless medical equipment.
The frequency range that implantable medical frequency range appears in 1999 by Federal Communications Commission to formulate earliest exists
402-405MHz, unlimited medical services (abbreviation MICS) frequency range as often said.Its frequency range is dedicated within the scope of 2 meters
Implantable medical device communication, traffic rate is up to 250kbit/s.Also 402-405MHz publications are made a living in 2007 in China
The special frequency range of object medical telemetry.The research of current wireless medical equipment is also concentrated mainly on the frequency range, while also frequently involving work
433.1-434.8MHz, 868-868.6MHz, 2.40-2.483GHz and 5.725- of industry, science and Medical band (abbreviation ISM)
5.850GHz with ultra wide band frequency 3.1-10.6GHz.
For implanted antenna, it is relatively conventional to be operated in ISM band, compared to MICS and WMTS, using frequency band
It is wider, there is higher radio channel capacity, so the ISM band of 5.8GHz is used for biotelemetry by many countries in recent years.
Such as Xu.Li-Jie et al. is delivered《Dual-Band Implantable Antenna With Open-End Slots on
Ground》The antenna that plane inverse-F structure is used in article, devises double frequency implanted antenna, but antenna horizontal size is larger, is
19mm×19.4mm×1.27mm；Li Ming nine et al. was in 2017《Electronic component and material》On deliver《A kind of novel three-frequency
The design of section implanted antenna》It is middle that multifrequency is realized using multilayer planar inverted f structure, but up to three layers of the number of plies, both increased thickness or
Improve difficulty of processing；Application No. is 2017104811199 Chinese patents to disclose a kind of small sized double frequency implanted medical flexible day
Line, the antenna use coaxial feed, and adjusting operating frequency of antenna with short-circuit patch realizes two-frequency operation, size be 15mm ×
15mm×1mm.But since the complexity coaxial feeder of organization of human body implements, to be quite not easy its thickness in addition too thick and solid existing
Bending will be relatively difficult so that the compatibility with human body substantially reduces.Therefore it is super to design a kind of miniaturization simple in structure
Thin implanted antenna is of great significance.
Utility model content
In view of the deficiencies of the prior art, the technical issues of the utility model intends to solve is to provide one kind and being operated in ISM band
Medical implantable antenna, it is simple in structure and novel, it is small-sized, it is easy to process, fed by microstrip feed line, radiation patch
Piece is used through two round intersections, then the structure of symmetrical four arc corner cuts is opened in lower circle, is effectively increased
Electric current effective length, greatly reduces antenna size；The beamwidth of antenna can be increased by reducing the width of ground plane simultaneously.
The utility model solve the technical problem the technical solution adopted is that：A kind of doctor being operated in ISM band is provided
Implanted antenna, including radiation patch, microstrip feed line, ground plane and medium substrate are treated, it is characterized in that：The radiation patch by
Upper and lower two round intersections are constituted, and are arranged there are four arc corner cut by axial symmetry of two circular circle center line connectings in lower circle,
The arc corner cut is that lower circular edge cuts a rectangle composition；The arc corner cut bottom edge being located above to the lower round center of circle
Distance is not equal to underlying arc corner cut top margin to the distance in the lower round center of circle, four arc corner cuts to two circular circles
The distance of heart line is equal；The microstrip feed line circular bottom under is closely coupled；
The ground plane generally rectangle, the both upper ends thereof corner cut structure having the same of rectangle, corner cut structure are erected
Straight flange length is equal to the width of ground plane, and the width of ground plane is medium substrate width 1/10~1/5, removal corner cut structure
The upper length of side of ground plane is less than the lower length of side, and the radiation patch is parallel with ground plane, and the medium substrate is filled in
Between radiation patch and ground plane, medium substrate is made of flexible material.
Compared with prior art, the utility model has following remarkable advantage：
1, simple in structure：The utility model is simple in structure and novel, effective in such a way that two circles intersect, open square groove
Increasing the effective length of electric current makes antenna size substantially reduce, smaller, easy to process；
2, bandwidth and frequency are adjustable：The utility model can be to day by adjusting the width and the square groove length of side of ground plane
Tape is wide and working frequency is mediated；
3, the ground plane of the application is much smaller than the bottom surface of medium substrate, reduces the width of ground plane, and be grounded
Plane both ends opened two triangle corner cut structures reduced while increasing bandwidth post body interference.By in two circle intersections
Subtract the mating reaction of the irregular arc corner cut of square appearance and the triangle corner cut structure of ground plane, further drop
It is low to post body interference effect；
4, the loss of antenna is low, bandwidth of operation.The return loss that can be worked antenna in practical engineering application is-
10dB, and general Antenna Design has focused largely on -20dB between -35dB, the return loss of the application can reach -
46.77dB.General voltage standing wave ratio engine request is less than 2, and most of between 1.5-2, the application has reached 1.03.Phase
There is lower loss and standing-wave ratio for existing antenna, being implanted into human body deeper position for antenna lays a good foundation.
5, the medium substrate of the application uses dielectric constant for 4 polyimide flex material, and very thin thickness so that day
Line is more flexurally compliant and reaches good implantation effect.
6, relative to the patent 2017104811199 applied before applicant, the application can apply to skin and fat
Between, and it is original be only applied to skin surface, and has the following advantages：Smaller, is become from 15mm × 15mm × 1mm
14mm×12mm×0.15mm；Loss is lower, and return loss becomes -46.77dB from -28.19dB, reduces fully nearly
20dB；Bandwidth of operation is wider, becomes 5.380-6.430GHz from 5.520-5.900GHz, bandwidth has more than tripled；Bandwidth
The reduction of increase and loss, size are thinner, make the thinner bending easy to implement of the application, practical application space bigger, implantation depth
It is deeper to use.
Description of the drawings
Fig. 1 is a kind of Facad structure figure for the medical implantable antenna being operated in ISM band of the utility model.
Fig. 2 is a kind of backside structure figure for the medical implantable antenna being operated in ISM band of the utility model.
Fig. 3 is a kind of medical implantable antenna being operated in ISM band of the utility model under 5.8GHz skin electrical characteristics
Return loss plot figure.
Fig. 4 is a kind of medical implantable antenna being operated in ISM band of the utility model under 5.8GHz skin electrical characteristics
Voltage standing wave ratio curve graph.
Fig. 5 is a kind of medical implantable antenna being operated in ISM band of the utility model under 5.8GHz skin electrical characteristics
Directional diagram.
In figure, radiation patch 11, arc corner cut 111,112,113,114, lower round 115, upper round 116, microstrip feed line
21, ground plane 31, medium substrate 41, corner cut structure 311,312.
Specific implementation mode
With reference to embodiment and attached drawing, the utility model is described in further detail, but not in this, as right
The restriction of the application protection domain.
Utility model works ISM band medical implantable antenna (abbreviation antenna, referring to Fig. 1-2), including radiation
Patch 11, microstrip feed line 21, ground plane 31 and medium substrate 41, the radiation patch are made of upper and lower two round intersections,
Using two circular circle center line connectings as axial symmetry setting, there are four arc corner cut (111,112,113,114), institutes on lower round 115
It is that lower circular edge cuts a rectangle composition to state arc corner cut；The arc corner cut bottom edge being located above to the lower round center of circle away from
With a distance from not equal to underlying arc corner cut top margin to the lower round center of circle, four arc corner cuts to two circular centers of circle
The distance of line is equal；The microstrip feed line circular bottom under is closely coupled；
The ground plane generally rectangle, the both upper ends thereof corner cut structure having the same (311,312) of rectangle, corner cut
The vertical length of side of structure is equal to the width of ground plane, and the width of ground plane is medium substrate width 1/10~1/5, and removal is cut
The upper length of side of the ground plane of corner structure is less than the lower length of side, and the radiation patch is parallel with ground plane, the medium base
Plate is filled between radiation patch and ground plane, and medium substrate is made of flexible material.
The medium substrate use dielectric constant for 4 polyimide flex material, size be 14mm × 12mm ×
0.15mm。
The arc corner cut is that lower circular edge cuts a square composition.Circle is for rectangle in comparable size
The lower longer current path of arc length is also just longer, and opens square groove and even more elongated path again.For antenna, four
The length of side of square, the relative position of square, four squares arrive down circular circle center distance, the two circular centers of circle with respect to position
Can all the return loss, working frequency, bandwidth of operation of antenna be had an impact by setting.
The upper round circular radius ratio under is 1:2, two circular distance of center circle circular radius ratio under is
2.6：2.08, the circular radius ratio under that becomes of the square is 0.8：2.08.The width of ground plane is medium substrate
Width 3/25.
The distance in the arc corner cut bottom edge being located above to the lower round center of circle is arrived more than underlying arc corner cut top margin
The distance in the lower circle center of circle.
The generally rectangle of 12mm × 1.5mm of the ground plane 31.
Corner cut structure on the ground plane 31 is right angled triangle or arc.The specific size of corner cut structure is to antenna
Performance have an impact, lose if selection rectangle corner cut and without cutting reduction and post body and interfere this effect, in the utility model
Preferential right angled triangle corner cut structure.
Two round intersection up and down in the utility model, two circular diameter positions will produce very antenna performance
The size of big influence, lap can also have an impact antenna performance, and two circular diameters are bigger and intersect fewer electricity
The path of stream will be longer, and frequency will be lower, reverse-frequency then higher.
The utility model can adjust working frequency range by changing four square length of sides and reduce antenna size；
Increase bandwidth by reducing ground plane, the in general size of ground plane should be the bottom surface size phase with medium substrate
The width of ground plane is significantly reduced Deng, the utility model, and opened two triangle corner cuts at both ends to increase band
It is reduced again while wide and posts body interference；It can be substantially reduced by triangle corner cut structure and the setting of irregular arc corner cut
Parasitic disturbances.
Embodiment 1
The present embodiment is operated in the medical implantable antenna of ISM band, including radiation patch 11, microstrip feed line 21, ground connection
Plane 31 and medium substrate 41.Radiation patch is made of upper round 116 and lower round 115 intersection, with two circles on lower round 115
The circle center line connecting of shape is arc corner cut (111,112,113,114) there are four axial symmetry settings, and the arc corner cut is lower circle
Edge cuts a square and constitutes；The distance of four arc corner cuts to two circular circle center line connectings is equal；Lower round circle
The heart is O1, the upper circle center of circle is O2, the bottom edge of medium substrate 41 is L, and four squares cut are close to lower circle center of circle O1Just
Square vertices are respectively a, b, c, d, and a, b are respectively underlying two square vertex, and c, d are respectively to be located above
Two square vertex.
Lower round 115 radius is 2.08mm, and lower circle center of circle O1Distance apart from bottom edge L is 5.6mm, upper circle
116 radius is 1.04mm, and upper circle center of circle O2Distance apart from bottom edge L is 8.4mm, and four square length of sides are
0.8mm, it is lower circle center of circle O1 to square vertices a, b distance beLower circle center of circle O1 is to square vertices
C, the distance of d isDistance of the square apart from the lower round center of circle differs up and down, and different relative distance can be right
Antenna generates different results of property.
Microstrip feed line 21 is the rectangle of 0.8mm × 3.68mm, and microstrip antenna is connected with lower round 115 lower end, medium base
Plate be size be 14mm × 12mm × 0.15mm cube thin plate, use dielectric constant for 4 polyimide flex material
It is made.
Radiation patch 11 is parallel with ground plane 31, the generally rectangle of 12mm × 1.5mm of the ground plane 31, square
The both upper ends thereof of shape has corner cut structure 311,312, and two corner cut planform sizes are identical, is right angled triangle, respectively position
In the upper left side and upper right side of ground plane 31；The size of the bevel edge of right angled triangle isAfter cutting corner cut structure
The bottom size dimension of ground plane be 12mm, top size dimension be 10.2mm, two bevel edges size be
The a length of 1.5mm of vertical edge of corner cut structure, a length of 0.9mm of horizontal sides of corner cut structure.
As shown in figure 3, being return loss plot figure of the present embodiment under 2.45GHz skin electrical characteristics.The utility model
It is implantation human skin, for detecting function of human body and illness, dielectric of the human skin under the working frequency points of 5.8GHz is normal
Number is 35.11, conductivity 3.717.As can be seen from the figure under 5.8GHz frequency points Antenna Operation in 5.380-6.430GHz
In frequency range, return loss value reaches -46.77dB, and anti-interference ability is stronger.
As shown in figure 4, being voltage standing wave ratio curve graph of the present embodiment under 5.8GHz skin electrical characteristics.Human skin exists
Dielectric constant under the working frequency points of 5.8GHz is 35.11, conductivity 3.717.As can be seen from the figure in 5.8GHz frequency points
Lower antenna reaches 18.1% in -10dB bandwidth below, and the voltage standing wave ratio in ISM5.8GHz band limits is respectively less than 2,
1.2 are even lower than near 5.8GHz, so can be good at meeting requirement of engineering.
If Fig. 5 is the directional diagram of this example antenna in 5.8GHz, as can be seen from the figure this example is in entire frequency range
It is interior that there is preferable directionality, meet design requirement.
Examples detailed above is the preferable embodiment of the utility model, in addition on the basis of this example, only for radiation fin
Structure do a shift in position or different mode of grooving, the size of the position of fluting and ground plane and size changes
Become, all should include within the protection scope of the present utility model.
The utility model does not address place and is suitable for the prior art.
Claims (8)
1. a kind of medical implantable antenna being operated in ISM band, including radiation patch, microstrip feed line, ground plane and medium
Substrate, it is characterized in that：The radiation patch is made of upper and lower two round intersections, is connected with two circular centers of circle in lower circle
Line is arc corner cut there are four axial symmetry settings, and the arc corner cut is that lower circular edge cuts a rectangle composition；Positioned at upper
The distance in the arc corner cut bottom edge of side to the lower round center of circle is not equal to underlying arc corner cut top margin to the lower round center of circle
The distance of distance, four arc corner cuts to two circular circle center line connectings is equal；The microstrip feed line circular bottom under
It is closely coupled；
The ground plane generally rectangle, the both upper ends thereof corner cut structure having the same of rectangle, the vertical edge of corner cut structure
The width of the long width equal to ground plane, ground plane is medium substrate width 1/10 ~ 1/5, removes the ground connection of corner cut structure
The upper length of side of plane is less than the lower length of side, and the radiation patch is parallel with ground plane, and the medium substrate is filled in radiation
Between patch and ground plane, medium substrate is made of flexible material.
2. the medical implantable antenna according to claim 1 for being operated in ISM band, which is characterized in that the medium base
Plate use dielectric constant for 4 polyimide flex material.
3. the medical implantable antenna according to claim 2 for being operated in ISM band, which is characterized in that the medium base
The size of plate is 14mm × 12mm × 0.15mm.
4. the medical implantable antenna according to claim 1 for being operated in ISM band, which is characterized in that the arc is cut
Angle is that lower circular edge cuts a square composition.
5. the medical implantable antenna according to claim 4 for being operated in ISM band, which is characterized in that upper round under
Circular radius ratio is 1:2, two circular distance of center circle circular radius ratio under is 2.6：2.08, the square becomes
Circular radius ratio is 0.8 under：2.08.
6. the medical implantable antenna according to claim 1 for being operated in ISM band, which is characterized in that be located above
The distance in arc corner cut bottom edge to the lower round center of circle is more than underlying arc corner cut top margin to the distance in the lower round center of circle.
7. the medical implantable antenna according to claim 1 for being operated in ISM band, which is characterized in that the ground connection is flat
The face generally rectangle of 12mm × 1.5mm.
8. the medical implantable antenna according to claim 1 for being operated in ISM band, which is characterized in that the ground connection is flat
Corner cut structure on face is right angled triangle or arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721764974.2U CN207611867U (en) | 2017-12-18 | 2017-12-18 | A kind of medical implantable antenna being operated in ISM band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721764974.2U CN207611867U (en) | 2017-12-18 | 2017-12-18 | A kind of medical implantable antenna being operated in ISM band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207611867U true CN207611867U (en) | 2018-07-13 |
Family
ID=62798271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721764974.2U Withdrawn - After Issue CN207611867U (en) | 2017-12-18 | 2017-12-18 | A kind of medical implantable antenna being operated in ISM band |
Country Status (1)
| Country | Link |
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| CN (1) | CN207611867U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946760A (en) * | 2017-12-18 | 2018-04-20 | 河北工业大学 | A kind of medical implantable antenna for being operated in ISM band |
| CN113571884A (en) * | 2021-07-22 | 2021-10-29 | 河北工业大学 | Helical antenna applied to implantable wireless capsule system |
-
2017
- 2017-12-18 CN CN201721764974.2U patent/CN207611867U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946760A (en) * | 2017-12-18 | 2018-04-20 | 河北工业大学 | A kind of medical implantable antenna for being operated in ISM band |
| CN107946760B (en) * | 2017-12-18 | 2024-02-27 | 河北工业大学 | Medical implantable antenna working in ISM frequency band |
| CN113571884A (en) * | 2021-07-22 | 2021-10-29 | 河北工业大学 | Helical antenna applied to implantable wireless capsule system |
| CN113571884B (en) * | 2021-07-22 | 2024-01-12 | 河北工业大学 | Spiral antenna applied to implanted wireless capsule system |
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Granted publication date: 20180713 Effective date of abandoning: 20240227 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180713 Effective date of abandoning: 20240227 |
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| AV01 | Patent right actively abandoned |