CN108281778A - A kind of extending flexible flat dipole antenna - Google Patents
A kind of extending flexible flat dipole antenna Download PDFInfo
- Publication number
- CN108281778A CN108281778A CN201711466420.9A CN201711466420A CN108281778A CN 108281778 A CN108281778 A CN 108281778A CN 201711466420 A CN201711466420 A CN 201711466420A CN 108281778 A CN108281778 A CN 108281778A
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- CN
- China
- Prior art keywords
- antenna
- flexible flat
- dipole antenna
- extending flexible
- flat dipole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/085—Flexible aerials; Whip aerials with a resilient base
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
-
- 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
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
- H01Q9/285—Planar dipole
Landscapes
- Details Of Aerials (AREA)
Abstract
The present invention proposes a kind of extending flexible flat dipole antenna, solves the problems, such as that existing Bluetooth antenna can not be applied to flexible wearable equipment.The extending flexible flat dipole antenna includes flexible substrates and two antenna radiation units being printed in the flexible substrates, each antenna radiation unit is the periodical bending structure of meander shape, that is the bending of everywhere wave crest and trough is the circular arc of same curvature radius, and the distance that the center location of adjacent circular arc projects in X-axis and Y-axis is equal；Two antenna radiation units are symmetrical arranged so that connecting into meander shape on the whole, but form feed port in symmetrical stitching portion setting notch.The present invention effectively increases the extending flexibility of antenna, can adapt to tensile deformation and Bending Deformation very well；Bandwidth of operation can also cover Bluetooth band in the case that antenna is stretched to 20% in the direction of the x axis.
Description
Technical field
The present invention relates to antenna technologies, and in particular to a kind of antenna can be applied to flexible wearable equipment.
Background technology
The fast development of Internet of Things drives wearable field to emerge rapidly in recent years, in order to cope between wearable device
The concept of wireless communication problems, body area network is suggested.Body area network will be implanted into human body or be worn on a variety of sensings of human body surface
Device and portable portable device such as bracelet, mobile phone etc. form one private local area network, the sensor of each separation
It is wirelessly connected with smart machine；The appearance of body area network is greatly enriched the application of wearable device.
It is also one of most important part is exactly wireless receiving and dispatching antenna that body area network is most basic.Wearable device is just towards small-sized
Change, flexibility, extendingization direction develop, in order to preferably and human body docking, this requires for its communicate antenna
There should be certain flexible ductility.In wearable application scenarios, usually will appear antenna is caused to grow by force-extension
The case where degree variation.According to antenna basic theories, the center resonant frequency of antenna is determined by the electrical length of antenna, extending soft
When property antenna is led to antenna deformation by outer force effect, the electrical length of antenna can also change therewith, so as to cause center of antenna
Resonance frequency shift makes the frequency band of bandwidth of operation off-design, it is difficult to apply in flexible wearable field.
Invention content
The present invention in view of the above shortcomings of the prior art, proposes a kind of extending flexible flat dipole antenna, it is intended to solve
Certainly existing Bluetooth antenna can not be applied to the problem of flexible wearable equipment.
The solution of the present invention is as follows：
The extending flexible flat dipole antenna, including flexible substrates and two days being printed in the flexible substrates
Beta radiation unit, each antenna radiation unit are the periodical bending structure of meander shape, i.e., everywhere wave crest and trough is curved
Folding is the circular arc of same curvature radius, and the distance that the center location of adjacent circular arc projects in X-axis and Y-axis is equal；Two days
Beta radiation unit is symmetrical arranged so that connecting into meander shape on the whole, but form feed port in symmetrical stitching portion setting notch.
Based on above scheme, the present invention has also further made following optimization：
Above-mentioned symmetrical stitching portion is the wave crest or wave trough position of antenna radiation unit.
The both ends of above-mentioned two antenna radiation unit entirety correspond to wave crest or wave trough position；Relative to complete wave crest, wave
The both ends of circular arc at paddy, two antenna radiation unit entirety are a semi arch.
For above-mentioned antenna radiation unit in addition to wave crest, wave trough position, other positions are straightway.
In addition to feed port, each antenna radiation unit includes 4.5 circular arcs.
The circular arc number of degrees at complete wave crest, trough are 137.6 °, the circular arc degree at the both ends of two antenna radiation unit entirety
Number is 68.8 °.
The whole total lengths in the X-axis direction of two antenna radiation units are 31.6mm, line thickness 0.4mm, adjacent
The distance that the center location of circular arc projects in X-axis and Y-axis is 3.1mm, and two distributing points of feed port are at a distance of 0.2mm.
The material of above-mentioned flexible substrates is preferred with PDMS.
The material of above-mentioned antenna radiation unit is preferred with metallic copper.
The extending flexible flat dipole antenna is fed using microstrip feed line.
The thickness of above-mentioned flexible substrates is 1mm, and the thickness of antenna radiation unit is 1 μm.
The present invention has the following advantages：
The antenna is printed in flexible substrate, and the radiation brachium of antenna is reduced by using arc-shaped cabling mode
Degree, has also further widened the bandwidth of operation of antenna.The thickness that the structure also reduces flexible substrate and antenna metal layer needs,
The extending flexibility for improving antenna, can adapt to tensile deformation and Bending Deformation very well.Antenna is stretched in the direction of the x axis
Bandwidth of operation can also cover Bluetooth band in the case of 20%, suitable for there is the wearable field of extending flexible demand.
Description of the drawings
Fig. 1 is the overall structure diagram of inventive antenna.
Fig. 2 is the structure size schematic diagram of inventive antenna radiating element.
Fig. 3 is the S of extending antenna11Parameters simulation result figure.
Specific implementation mode
In order to make technical problems, technical solutions and advantageous effects to be solved by the present invention be more clearly understood, below in conjunction with
The present invention is described in detail for attached drawing.
Traditional plane dipole antenna has the radiation arm of linear cabling, and deformation is stretched in wearable field
When, the physical length of antenna changes, and so that the centre frequency of antenna and bandwidth of operation is moved toward low-frequency range, leads to antenna performance
It is rapid to deteriorate.For the radiating element of arc-shaped cabling when being stretched deformation, physical length is elongated on stress application direction,
And shortening on stress direction, it is found by emulating, the antenna with arc-shaped radiating element is being stretched deformation
When its centre frequency can't monotonic decreasing, but near some Frequency point occur left and right oscillation, have certain stability.
The plane dipole antenna of the present invention includes the radiating element of two arc-shaped cablings, with reference to attached drawing 1, in X-axis side
When being stretched upwards, the length in X-direction can increase, and the length in Y direction can reduce, this, which can further alleviate, draws
Stretch influence of the deformation to antenna physical length.
In order to promote the flexible ductility of antenna, radiating element is printed on by way of transfer on PDMS substrates,
With reference to attached drawing 2, antenna metal part in a plane, is printed on the upper surface of flexible PDMS substrates.Substrate thickness is 1mm,
Relative dielectric constant is 2.67.
Antenna includes two symmetrical radiating elements, and each radiating element is arc-shaped cabling, and antenna is in the X-axis
Total length be 31.6mm, line thickness 0.4mm, comprising 4.5 circular arcs (without the notch circular arc for feeding mouth), four are located at
Internal circular arc and half of circular arc being located on side, the center of circle of adjacent circular arc are in the x-direction and the z-direction apart from equal
The circular arc number of degrees of 3.1mm, all circular arc radius of curvature having the same, inner antenna are 137.6 °, the circular arc number of degrees of the extreme side
Be 68.8 °, i.e., the half of internal circular arc.Antenna is fed in intermediate notch circular arc, and two distributing points are at a distance of 0.2mm.
Since the extending dipole antenna of the present invention is produced on flexible PDMS substrates, can not make on substrate logical
Hole, thus antenna should use plane microstrip line be fed.
Compared to conventional planar PCB Bluetooth antennas, which passes through traditional linear spoke
It penetrates arm cabling and becomes cabling in the arc-shaped, and use flexible substrates PDMS so that antenna has good flexibility, including ductility
And bendability characteristics, 20% can be stretched in the direction of the x axis and Bluetooth band is completely covered in bandwidth of operation.
Simulation result to S11 parameters in antenna drawing process as shown in figure 3, antenna at original state (not stretching) in
Heart resonant frequency is about 150MHz in 2.45GHz, -10dB bandwidth.As amount of tension is 5% increase, center of antenna frequency with step-length
Rate vibrates by a small margin near 2.45GHz, and antenna -10dB bandwidth can cover bluetooth substantially before amount of tension reaches 25%
Frequency range, when amount of tension reaches 25%, -10dB bandwidth removes Bluetooth band.It can be seen that antenna is in the X-axis with 20%
Stretch capability works at the same time bandwidth and Bluetooth band is completely covered, and meets the wearable extending demand flexible to antenna.
It should be noted that above example is only preferred embodiment of the invention；For the common of the art
For technical staff, the inventive concept of the scheme and its embodiment that are limited based on the application independent claims, if can also make
Dry adjustment (such as：Each antenna radiation unit is not necessarily the only 4.5 circular arcs, is not necessarily 137.6 °/68.8 ° circular arcs, differs
It is scheduled on wave trough position setting feed port, whole both ends are not necessarily a semi arch), the scheme after these adjustment is also fallen into certainly
Scope of patent protection.
Claims (10)
1. a kind of extending flexible flat dipole antenna, it is characterised in that：It is printed on including flexible substrates and two described soft
Property substrate on antenna radiation unit, each antenna radiation unit is the periodical bending structure of shape of meandering, i.e. everywhere wave
The bending of peak and trough is the circular arc of same curvature radius, the distance that the center location of adjacent circular arc projects in X-axis and Y-axis
It is equal；Two antenna radiation units are symmetrical arranged so that connecting into meander shape on the whole, but notch shape is arranged in symmetrical stitching portion
At feed port.
2. extending flexible flat dipole antenna according to claim 1, it is characterised in that：The symmetrical stitching portion is
The wave crest or wave trough position of antenna radiation unit.
3. extending flexible flat dipole antenna according to claim 1, it is characterised in that：Described two aerial radiations
The both ends of unit entirety correspond to wave crest or wave trough position；Relative to the circular arc at complete wave crest, trough, two aerial radiation lists
First whole both ends are a semi arch.
4. extending flexible flat dipole antenna according to claim 1, it is characterised in that：The antenna radiation unit
In addition to wave crest, wave trough position, other positions are straightway.
5. extending flexible flat dipole antenna according to claim 3, it is characterised in that：In addition to feed port, often
A antenna radiation unit includes 4.5 circular arcs.
6. extending flexible flat dipole antenna according to claim 3, it is characterised in that：At complete wave crest, trough
The circular arc number of degrees be 137.6 °, the circular arc number of degrees at the both ends of two antenna radiation unit entirety are 68.8 °.
7. extending flexible flat dipole antenna according to claim 3, it is characterised in that：Two antenna radiation units
Whole total length in the X-axis direction is 31.6mm, and line thickness 0.4mm, the center location of adjacent circular arc is in X-axis and Y-axis
The distance of upper projection is 3.1mm, and two distributing points of feed port are at a distance of 0.2mm.
8. extending flexible flat dipole antenna according to claim 1, it is characterised in that：The material of the flexible substrates
Matter is PDMS；The material of the antenna radiation unit is metallic copper.
9. extending flexible flat dipole antenna according to claim 1, it is characterised in that：The extending flexible flat
Dipole antenna is fed using microstrip feed line.
10. extending flexible flat dipole antenna according to claim 1, it is characterised in that：The flexible substrates
Thickness is 1mm, and the thickness of antenna radiation unit is 1 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711466420.9A CN108281778A (en) | 2017-12-28 | 2017-12-28 | A kind of extending flexible flat dipole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711466420.9A CN108281778A (en) | 2017-12-28 | 2017-12-28 | A kind of extending flexible flat dipole antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108281778A true CN108281778A (en) | 2018-07-13 |
Family
ID=62802507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711466420.9A Pending CN108281778A (en) | 2017-12-28 | 2017-12-28 | A kind of extending flexible flat dipole antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108281778A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994215A (en) * | 2019-12-13 | 2020-04-10 | 西安电子科技大学 | Flexible electronic system based on network-on-chip structure |
| CN112467349A (en) * | 2020-11-18 | 2021-03-09 | 南通大学 | Brack type adjustable flexible antenna device |
| CN113644414A (en) * | 2021-07-08 | 2021-11-12 | 大连理工大学 | Antenna device, method for manufacturing the same, and communication device |
Citations (4)
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| CN103116803A (en) * | 2013-01-29 | 2013-05-22 | 华中科技大学 | RFID (radio frequency identification) electronic tag based on fractal spring structure, radio frequency antenna based on fractal spring structure, and preparation method of RFID electronic tag |
| CN103367880A (en) * | 2013-07-05 | 2013-10-23 | 华中科技大学 | Frequency-adjustable stretchable liquid metal antenna and manufacture method thereof |
| CN204179216U (en) * | 2014-09-22 | 2015-02-25 | 东华大学 | A kind of weaving doublet antenna |
| CN106910973A (en) * | 2017-03-08 | 2017-06-30 | 常州大学 | A kind of Highly-conductive elastomer, preparation method and its flexible extensible antenna |
-
2017
- 2017-12-28 CN CN201711466420.9A patent/CN108281778A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103116803A (en) * | 2013-01-29 | 2013-05-22 | 华中科技大学 | RFID (radio frequency identification) electronic tag based on fractal spring structure, radio frequency antenna based on fractal spring structure, and preparation method of RFID electronic tag |
| CN103367880A (en) * | 2013-07-05 | 2013-10-23 | 华中科技大学 | Frequency-adjustable stretchable liquid metal antenna and manufacture method thereof |
| CN204179216U (en) * | 2014-09-22 | 2015-02-25 | 东华大学 | A kind of weaving doublet antenna |
| CN106910973A (en) * | 2017-03-08 | 2017-06-30 | 常州大学 | A kind of Highly-conductive elastomer, preparation method and its flexible extensible antenna |
Non-Patent Citations (1)
| Title |
|---|
| A. ARRIOLA ; J.I. SANCHO ; S. BREBELS ; M. GONZALEZ ; W. DE RAED: "Stretchable dipole antenna for body area networks at 2.45 GHz", 《IET MICROWAVES, ANTENNAS & PROPAGATION》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994215A (en) * | 2019-12-13 | 2020-04-10 | 西安电子科技大学 | Flexible electronic system based on network-on-chip structure |
| CN110994215B (en) * | 2019-12-13 | 2021-05-11 | 西安电子科技大学 | Flexible electronic system based on network-on-chip structure |
| CN112467349A (en) * | 2020-11-18 | 2021-03-09 | 南通大学 | Brack type adjustable flexible antenna device |
| CN113644414A (en) * | 2021-07-08 | 2021-11-12 | 大连理工大学 | Antenna device, method for manufacturing the same, and communication device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180713 |
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| WD01 | Invention patent application deemed withdrawn after publication |