CN106486783A - The new leakage cable of internet of things oriented application - Google Patents
The new leakage cable of internet of things oriented application Download PDFInfo
- Publication number
- CN106486783A CN106486783A CN201611081248.0A CN201611081248A CN106486783A CN 106486783 A CN106486783 A CN 106486783A CN 201611081248 A CN201611081248 A CN 201611081248A CN 106486783 A CN106486783 A CN 106486783A
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- gap
- internet
- things
- periodicity
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
-
- 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
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
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- Waveguide Aerials (AREA)
Abstract
The invention discloses a kind of new leakage cable of internet of things oriented application, including be sequentially arranged by internal layer outer layers inner wire, dielectric layer, outer conductor, insulating protective layer, outer conductor has continuous gap vertically, and the both sides in continuous gap have periodicity gap.Continuous gap is corrugated bending type gap or linear gap, the interlaced arrangement in the periodicity gap of continuous gap both sides.Periodicity gap is single triangular slits or multiple triangle sets joint close gaps or is L-type or U-shaped gap.Suitable for RFID of Internet-of-things/Application in Sensing, with high coupling loss.Used as hyperfrequency (UHF) Internet of Things antenna, the leakage coaxial cable of high coupling loss can provide the purpose that larger emittance reaches reading so as to activate label at a distance.
Description
Technical field
The present invention relates to a kind of leakage coaxial cable, the new leakage cable of more particularly to a kind of internet of things oriented application.
Background technology
In recent years, some new, urgent application demands were occurred in that in RFID of Internet-of-things, Application in Sensing field.These need
Ask and show two aspects：1) require that hyperfrequency (UHF) Internet of Things antenna can cover and only cover a region that specifies；2)
It is required that passive UHF RFID label tag is integrated with passive sensor, passive RFID/Sensor is formed, realize to thing in specific region
The recognition of body and the perception of physical environment information.When this region is elongated zones, the one of such as long row's storage rack
The management of product, fine manipulation warmhouse booth on article and temperature and humidity monitor, an industrial processing line on layer
The mark of each plant of a line crops and Temperature and Humidity Control, fence of safety monitoring etc., Internet of Things is as using tradition
Directional radiation antenna, can because beam coverage area is excessive or is unable to flexible modulation, it is difficult to competent.Existing solution typically by
Multiple antennas need region while working to cover.How to find a kind of deployment flexibly, regulation and control are convenient, inexpensive solution,
Realize formulating elongated zones or other irregular codes RFID/ sensing is covered, very worth research.
Leakage coaxial cable is to open a series of gaps in coaxial cable outer conductor to make its transmission energy reveal together
When reach the purpose of signal transmission and aerial radiation.In view of the feature of above-mentioned Internet of Things application demand, using leakage cable, that is, sew
Coaxial cable, it is expected to which excellent solution is provided.Using the leakage cable through particular design as hyperfrequency Internet of Things antenna, lead to
Cross Lou cable different interleaving deployment, can flexibly, conveniently realize the Distributed coverage to arbitrary region, so as to promote Internet of Things nothing
Source RFID/ senses the application at aspects such as storage rack, industrial production continuous productive process, green agriculture booth, security protection fences.
At present, existing leakage cable is applied to the communications field, and its coupling loss is little, emittance is low, directly applies to superelevation
When in frequency Internet of things system, its effective reading distance to passive RFID tags can only achieve several centimetres, it is impossible to meet normal work
The demand of environment.
Content of the invention
It is an object of the invention to provide a kind of new leakage cable of the internet of things oriented application with high coupling loss.
The purpose of the present invention is achieved through the following technical solutions：
The new leakage cable of the internet of things oriented application of the present invention, including be sequentially arranged by internal layer outer layers inner wire, Jie
Matter layer, outer conductor, insulating protective layer, the outer conductor have continuous gap vertically, and the both sides in the continuous gap have week
Phase property gap.
As seen from the above technical solution provided by the invention, internet of things oriented application provided in an embodiment of the present invention
New leakage cable, it is adaptable to RFID of Internet-of-things/Application in Sensing, with high coupling loss, the leakage coaxial cable of high coupling loss can
To provide the purpose that larger emittance reaches reading so as to activate label at a distance.
Description of the drawings
Fig. 1 is the Internet of Things multiaerial system schematic diagram with reference to switch arrays.
Fig. 2 is leakage coaxial cable as Internet of Things antenna Distributed coverage schematic diagram.
Fig. 3 is leakage coaxial cable axial direction schematic diagram in the embodiment of the present invention.
Fig. 4 is leakage coaxial cable outer conductor slotting structure design parameter schematic diagram in the embodiment of the present invention.
Fig. 5 is outer conductor slotting structure schematic diagram when inclination angle is 0 ° in the embodiment of the present invention.
Fig. 6 is superimposed triangular outer conductor slotting structure schematic diagram in the embodiment of the present invention.
Fig. 7 is the U-shaped outer conductor slotting structure schematic diagram in both sides in the embodiment of the present invention.
Fig. 8 is both sides L-type outer conductor slotting structure schematic diagram in the embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on this
Inventive embodiment, the every other enforcement obtained under the premise of creative work is not made by those of ordinary skill in the art
Example, belongs to protection scope of the present invention.
The new leakage cable of the internet of things oriented application of the present invention, its preferably specific embodiment is：
Including be sequentially arranged by internal layer outer layers inner wire, dielectric layer, outer conductor, insulating protective layer, the outer conductor
Continuous gap is had vertically, and the both sides in the continuous gap have periodicity gap.
The continuous gap is corrugated bending type gap or linear gap, the periodicity of the continuous gap both sides
The interlaced arrangement in gap.
The periodicity gap is single triangular slits or multiple triangle sets joint close gaps.
When the periodicity gap is single triangular slits, gap adopts the long hypotenuse triangular slits of gradual change.
The periodicity gap is L-type or U-shaped gap.
The new leakage cable of the internet of things oriented application of the present invention, is applied to Internet of things system, it is adaptable to RFID of Internet-of-things/biography
Sensing is used, with high coupling loss.Used as hyperfrequency (UHF) Internet of Things antenna, the leakage coaxial cable of high coupling loss is permissible
The purpose that larger emittance reaches reading so as to activate label at a distance is provided.
In the present invention, the leakage coaxial cable has continuous bending type seam using brand-new mode of cracking in outer conductor
Gap and its gap array of both sides periodic triangular shape gap or triangle sets joint close gap and other shapes gap composition leakage cable；
In described gap array, continuous bending type gap is the basis of cracking of this structure, and this continuous gap can ensure that
It is conducive to provide the leakage energy of stable and uniform so that the electric fields uniform distribution vertically of leakage cable, while by adjusting center slot
Width and inclination angle can change the size of basic leakage energy.Continuous bending type gap both sides are in staggered week up and down
Phase property triangular slits or triangle sets joint close gap and other shapes gap, can improve the coupling of leakage coaxial cable further
Loss is closed, improves the polarization mismatch problem of leakage coaxial cable, improve the overall performance of high coupling loss leakage coaxial cable.
Preferably, in the gap array, staggered gap adopts triangular slits structure up and down, and its hypotenuse can make
Circumferential and axial field component has phase difference, can achieve elliptic polarization mode, is conducive to improving RFID of Internet-of-things/sensing label
Read rate.
Preferably, in the gap array, staggered gap adopts the long hypotenuse triangular slits of gradual change or combination up and down
Gap, can make leakage coaxial cable change leakage cable characteristic impedance at place of cracking slow, reduce reflection, reduce loss, most
Being reached under high coupling loss eventually has large free working distance.
Preferably, in the gap array, staggered gap adopts L-type or U-shaped gap up and down, to leaking cable circumference
When radiation polarization is less demanding, is conducive to simplifying the design of Structural Parameters of leakage cable, increases the stability of leakage cable processing and manufacturing.
Beneficial effects of the present invention：
1st, the proposed by the invention high coupling loss leakage coaxial cable for being applied to Internet of things system, to leakage coaxial electricity
Cable brings brand-new application model, has filled up blank of the leakage cable in RFID of Internet-of-things/Application in Sensing.
2nd, the present invention adopts brand-new continuous bending type slot opening form, it is ensured that under passive RFID/Application in Sensing background, carry
Axial electric field for stable and uniform is distributed, while it is big to change leakage cable basis leakage energy by the adjustment at opposite joint width and inclination angle
Little.
3rd, continuous bending type gap both sides are in staggered periodic triangular shape gap or triangle sets joint close gap up and down
And other shapes gap, the coupling loss of leakage coaxial cable can be improved further, improve the polarization of leakage coaxial cable
Mismatch problems, reduce reflection, improve high coupling loss leakage coaxial cable and are applied in Internet of things system as read antenna
Overall reading performance.
4th, compared with traditional communication leakage cable, its coupling loss parameter can improve more than 20dB so as to used as Internet of Things antenna
Reading distance to passive label is significantly increased afterwards.
Specific embodiment：
Above-mentioned purpose, feature and advantage for making the present invention become apparent from understandable, below in conjunction with the accompanying drawings and specific embodiment party
The present invention is described in further detail for formula.
With reference to Fig. 3, one's duty invention proposes a kind of structure chart of the leakage coaxial cable embodiment 1 of high coupling loss, tool
Body includes the continuous gap 5 in inner wire 1, dielectric layer 2, outer conductor 3, insulating protective layer 4 and outer conductor center and both sides periodically
Gap 6.
This structure is periodic structure, is configured as hyperfrequency RFID of Internet-of-things antenna, and therefore operating center frequency is
915MHz.According to formula:
Wherein λ0Centered on operation wavelength, take 329mm herein；εrRelative dielectric constant for medium between internal and external conductor.Cause
This, can determine that the span of the cycle P under hyperfrequency RFID of Internet-of-things mode of operation from there.
The gap cycle is determined by formula below：
0.4P≤L≤0.5P
0.5b≤h1≤b
0.5h1≤h≤0.9h1
Wherein λ0Centered on operation wavelength, byDetermine, c is electromagnetic wave propagation speed in free space, f0For leakage
Let out the center operating frequency of coaxial cable designs；εrRelative dielectric constant for medium between internal and external conductor；B is leakage coaxial electricity
The external diameter of cable outer conductor.
Continuous bending type gap width and inclination angle value are：
1.5mm≤w≤3mm
0°≤θ≤10°
Under the triangular slits arrangement architecture distance center gap of center slot both sides the horizontal range on summit be 0.05P～
0.2P.
Continuous bending type gap purpose reaches, for more cutting current, the purpose for strengthening coupling loss, while providing steady
Fixed uniform axial electric field distribution.Its value is 1.5mm-3mm.
Slot inclination angle value is 0 °～10 °, and inclination angle is bigger, and axially cutting electric current also increases, and coupling loss strengthens.
It is then determined that the periodic triangular shape gap of center slot both sides arrangement.Determine the long L span of triangle base
0.4P-0.5P, triangle base distance center continuity slit centers line 15mm-20mm, adjustment triangular apex side position is
The inclined degree for adjusting axially cutting groove can directly control loss and the coupling loss of leakage cable, according to operating distance and reading
Distance makes appropriate adjustment, makes leakage cable reach optimum working performance.
The principle of each parameter selection is above：Center slot width w determined by the range of value, adjust w tunable
Relation between coupling loss and loss；Triangle base length essentially dictates the coupling loss of Lou cable；Triangle and center
The relative position in bending type gap directly affects cutting current distribution, and therefore appropriate optimal control can reach coupling loss and biography
Defeated loss is mutually coordinated, obtains the parameter of compromise.
In the embodiment above, leakage coaxial cable outer conductor cracks the cycle and size can also be adjusted as follows：
Gap sharping is periodically bent on outer conductor 3 and is changed into 0 °, so as to form special central line groove part gap, such as scheme
Shown in 5, this causes Lou cable to be easier to process, and is more suitable for batch production.
On outer conductor 3, the single triangular slits of bending type gap both sides are changed into overlapping triangular slits, as shown in Figure 6.
On outer conductor 3, the triangular slits structural change of bending type gap both sides is analog-U shaped gap structure, as shown in Figure 7.
On outer conductor 3, the structure side of bending type gap both sides is L-type gap structure, as shown in Figure 8.
Outer conductor slotting structure using structure shown in Fig. 3 is used as numerical：Here citing is intended merely to demonstration
Above-mentioned implementation is applied to the design of a coaxial cable, is not offered as the embodiment above and is only suitable for number listed below
According to.
It is 21mm to choose outer conductor external diameter, and inner conductor outer diameter is 9mm, and the dielectric between internal and external conductor is the poly- second of foaming
Its relative dielectric constant 1.26 of alkene；Leakage cable is applied to hyperfrequency Internet of Things antenna, and center operating frequency is 915MHz.Selection is cracked
Cycle P=256mm；Center slot width w=2mm, center bending type slot inclination angle angle=5 °, both sides triangular slits
Bottom side length L=113mm, triangle height h=15mm, triangle base distance center clearance distance h1=20mm, triangle top
Point is relative to sit vertex position m2=24mm.
Simulation model is carried out in HFSS all-wave 3 D electromagnetic design of Simulation software, obtain moving in the axial direction in this structure
Coupling loss at 2m is -46dB (50%) and -50dB (90%).Power output for 1W Internet of Things reader, passive mark
Minimum activation power is signed for, in -14dBm, the effective reading distance that label can be calculated according to fries transmission formula is 1.58m.
Its loss is 0.3dB/m, therefore can be calculated the effective reading distance to having no chance label at 15 meters and can reach 0.85m.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope of present disclosure, the change or replacement that can readily occur in,
Should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (5)
1. the new leakage cable of a kind of internet of things oriented application, it is characterised in that include by internal layer outer layers be sequentially arranged in lead
Body (1), dielectric layer (2), outer conductor (3), insulating protective layer (4), outer conductor (3) have continuous gap (5), institute vertically
The both sides for stating continuous gap (5) have periodicity gap (6).
2. the new leakage cable of internet of things oriented application according to claim 1, it is characterised in that continuous gap (5)
For corrugated bending type gap or linear gap, the interlaced cloth in the periodicity gap (6) of continuous gap (5) both sides
Put.
3. the new leakage cable of internet of things oriented application according to claim 1 and 2, it is characterised in that the periodicity seam
Gap (6) is single triangular slits or multiple triangle sets joint close gaps.
4. the new leakage cable of internet of things oriented application according to claim 3, it is characterised in that when the periodicity gap
(6), when for single triangular slits, gap adopts the long hypotenuse triangular slits of gradual change.
5. the new leakage cable of internet of things oriented application according to claim 1 and 2, it is characterised in that the periodicity seam
Gap (6) is L-type or U-shaped gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611081248.0A CN106486783B (en) | 2016-11-30 | 2016-11-30 | The novel leakage cable of internet of things oriented application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611081248.0A CN106486783B (en) | 2016-11-30 | 2016-11-30 | The novel leakage cable of internet of things oriented application |
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| CN106486783A true CN106486783A (en) | 2017-03-08 |
| CN106486783B CN106486783B (en) | 2019-06-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390155A (en) * | 2018-04-10 | 2018-08-10 | 中天射频电缆有限公司 | A kind of wide-angle radial leak coaxial cable |
| CN109085177A (en) * | 2018-08-22 | 2018-12-25 | 佳讯飞鸿（北京）智能科技研究院有限公司 | A kind of leakage cable appearance detecting method and device based on RFID positioning |
| WO2022143134A1 (en) * | 2020-12-28 | 2022-07-07 | 煤炭科学技术研究院有限公司 | Optimization method and device for radiofrequency energy loss of 5g communication base station for use in mining |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390155A (en) * | 2018-04-10 | 2018-08-10 | 中天射频电缆有限公司 | A kind of wide-angle radial leak coaxial cable |
| CN108390155B (en) * | 2018-04-10 | 2024-05-07 | 中天射频电缆有限公司 | Wide-angle radiation type leaky coaxial cable |
| CN109085177A (en) * | 2018-08-22 | 2018-12-25 | 佳讯飞鸿（北京）智能科技研究院有限公司 | A kind of leakage cable appearance detecting method and device based on RFID positioning |
| CN109085177B (en) * | 2018-08-22 | 2022-03-04 | 佳讯飞鸿（北京）智能科技研究院有限公司 | Leaky cable appearance detection method and device based on RFID positioning |
| WO2022143134A1 (en) * | 2020-12-28 | 2022-07-07 | 煤炭科学技术研究院有限公司 | Optimization method and device for radiofrequency energy loss of 5g communication base station for use in mining |
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| CN106486783B (en) | 2019-06-11 |
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