CN106486748A - A kind of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna - Google Patents
A kind of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna Download PDFInfo
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- CN106486748A CN106486748A CN201510527962.7A CN201510527962A CN106486748A CN 106486748 A CN106486748 A CN 106486748A CN 201510527962 A CN201510527962 A CN 201510527962A CN 106486748 A CN106486748 A CN 106486748A
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Abstract
The invention discloses a kind of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna, adjusts electric capacity, medium substrate, inner conductor weld, PCB, medium back side antenna arm and coaxial cable outer conductor weld including medium front antenna arm, impedance；Medium substrate extension is arranged on the surrounding of PCB, symmetrical with regard to PCB axis, and medium front antenna arm and medium back side antenna arm are in specular with regard to the center of medium substrate；One end of medium front antenna arm is connected with inner conductor weld, and the impedance adjusts electric capacity fluting and is arranged on the antenna arm of medium front, away from inner conductor weld 3-10mm.The present invention passes through multiple meandered antenna arm, reduces antenna size, with preferable bandwidth characteristic and higher gain.
Description
Technical field
The present invention relates to wireless communication technology, particularly a kind of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna.
Background technology
With developing rapidly for wireless communication technology, automatic control technology and the construction of intelligent residence area, wireless kilowatt meter reading-out system
By the concern of more and more researchers and significant progress is obtained.Wireless kilowatt meter reading-out system overcomes Traditional Man and copies
Data message circulation that watch is present is slow, length reporting period and human cost high the shortcomings of, can realize to water, electricity, gas
Use information carry out timely and effective reliable collection and analysis, but wireless kilowatt meter reading-out system there is also equipment cost height etc. and lack
Point.Wireless kilowatt meter reading-out system built-in antenna is important part in wireless kilowatt meter reading-out system, and conventional wireless kilowatt meter reading-out system
In built-in antenna generally relatively costly, the thicker ceramic antenna of thickness, because which is put particularly for gas meter, flow meter
It is placed on metallic conduit, antenna pair EMC Requirements are higher, therefore designs a low cost, low section, anti-metal
Wireless kilowatt meter reading-out system built-in antenna become the focus of recent research.
Half-wave dipole because its simple structure, with low cost and good omnidirectional radiation characteristic and Modern wireless communication lead
Domain receives significant attention.But when uhf band is operated in, the physical length of traditional dipole antenna excessively huge not
Beneficial to engineer applied, and generally need to realize and the mating of coaxial cable by balun mapped structure；Work as dipole
In when there is large-area metal environment, its radiance will be affected antenna, therefore how realize uhf band half-wave
The miniaturization of dipole antenna, directly low cost, coupling and anti-metal interference become the focus of recent research.
202159771 U of Chinese patent CN discloses a kind of built-in ultrahigh frequency omnidirectional antenna for wireless meter reading system, is based on
The element antenna of flexible material FPC medium sheet material, overall size are approximately 1/2 wavelength, and structure is excessively huge；Which adopts double
Face self-adhesive is pasted on the mode of wireless kilowatt meter reading-out system plastic casing and installs, and stability is not high；Its element antenna directly with
Axis is connected, it is difficult to obtain matched well；And wireless kilowatt meter reading-out system Internal PCB and gas meter, flow meter is not considered when designing
There is the impact to antenna performance in metal shell, during application, antenna performance may deteriorate.
Content of the invention
It is an object of the invention to provide a kind of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna.
The technical solution for realizing the object of the invention is：A kind of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna,
Including medium front antenna arm, impedance adjust electric capacity, medium substrate, inner conductor weld, PCB,
Medium back side antenna arm and coaxial cable outer conductor weld；
The medium substrate extension is arranged on the surrounding of PCB, and medium substrate is symmetrical with regard to PCB axis；
Medium front antenna arm and medium back side antenna arm are separately positioned on the basic front and back of medium, and medium
Front antenna arm and medium back side antenna arm are in specular with regard to the center of medium substrate；The inner conductor weldering
The place of connecing is arranged on the position of intersecting point on medium substrate front base and PCB axis；The coaxial cable outer conductor weldering
The place of connecing is arranged on the position of intersecting point on medium substrate back side base and PCB axis；
One end of medium front antenna arm is connected with inner conductor weld, and the impedance adjusts electric capacity fluting
It is arranged on the antenna arm of medium front, away from 3 10mm of inner conductor weld.
Compared with prior art, its remarkable advantage is the present invention：
(1) medium substrate of the present invention by the use of the PCB surrounding rest inside gas meter, flow meter as antenna, real
Show the integrated of antenna and PCB, while being easy to manufacture, reduce cost；
(2) present invention carries out multiple 90 degree of bending by electrode couple sub-antenna both arms, makes antenna structure in Fang Huanfen
Cloth, is greatly reduced the size of antenna, it is achieved that the miniaturization of antenna, while antenna still has preferable bandwidth characteristic
Higher gain；
(3) present invention adjusts the traditional barron structure of electric capacity replacement using impedance, it is achieved that element antenna and coaxial cable
Direct coupling, furthermore achieved that miniaturization while simple structure, easy to make, reduces cost；
(4) present invention takes into full account the metal shell at the gas meter, flow meter back side with internal PCB to antenna radiation performance
Interference, achieves antenna using methods such as the path of rational deployment antenna both arms, the loading positions of adjustment impedance matching capacitances
Antenna pattern is in the high-gain directed radiation of gas meter, flow meter front upper place.
Description of the drawings
Fig. 1 is the uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna top view of the present invention.
Fig. 2 is the uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna upward view of the present invention.
Fig. 3 is the uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna front view of the present invention.
Fig. 4 is uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna top view in the embodiment of the present invention.
Fig. 5 is position view of the antenna in uhf band gas meter, flow meter wireless kilowatt meter reading-out system in the embodiment of the present invention.
Fig. 6 is the reflectance factor result of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna in the embodiment of the present invention
Figure.
Fig. 7 is the E surface radiation directional diagram of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna in the embodiment of the present invention.
Fig. 8 is the H surface radiation direction of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna in the embodiment of the present invention
Figure.
Specific embodiment
Further description is made to the present invention with reference to the accompanying drawings and examples.
In conjunction with Fig. 1～Fig. 3, a kind of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna of the present invention, including medium
Front antenna arm 1, impedance adjust electric capacity 2, medium substrate 3, inner conductor weld 4, PCB 5,
Medium back side antenna arm 6 and coaxial cable outer conductor weld 7；
3 extension of the medium substrate is arranged on the surrounding of PCB 5, and medium substrate 3 is with regard to PCB 5
Axis is symmetrical；
Medium front antenna arm 1 and medium back side antenna arm 6 are separately positioned on the front and back of medium basic 3,
And medium front antenna arm 1 and medium back side antenna arm 6 are in specular with regard to the center of medium substrate 3；Described coaxial
Cable inner conductor weld 4 is arranged on the position of intersecting point on 3 front base of medium substrate and 5 axis of PCB；Institute
State the intersection point position that coaxial cable outer conductor weld 7 is arranged on 3 back side base of medium substrate and 5 axis of PCB
Put；
One end of medium front antenna arm 1 is connected with inner conductor weld 4, and the impedance adjusts electric capacity
2 flutings are arranged on medium front antenna arm 1, away from 3 10mm of inner conductor weld.
Medium front antenna arm 1 and medium back side antenna arm 6 are printed on medium substrate after bending by multiple 90 degree
On.
The material of the medium substrate 3 is the FR 4 of relative dielectric constant 4.4, and it is sky that thickness is 0.0009 λ, wherein λ
Gas medium wavelength.
The present invention is specifically described with reference to embodiment.
Embodiment
In conjunction with Fig. 1 Fig. 3, a kind of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna, including the positive surface antenna of medium
Arm 1, impedance adjusts electric capacity 2, medium substrate 3, inner conductor weld 4, PCB 5, the medium back of the body
Surface antenna arm 6, coaxial cable outer conductor weld 7；3 extension of medium substrate is arranged on the surrounding of PCB 5,
Medium substrate 3 is symmetrical with regard to 5 axis of PCB；The planar development area of built-in antenna is 120mm*60mm.
Medium front antenna arm 1 and medium back side antenna arm 6 are separately positioned on the front and back of medium basic 3, and are situated between
Matter front antenna arm 1 and medium back side antenna arm 6 are in specular with regard to the center of medium substrate 3；Lead in coaxial cable
Body weld 4 is arranged on the position of intersecting point on 3 front base of medium substrate and 5 axis of PCB；Outside coaxial cable
Conductor weld 7 is arranged on the position of intersecting point on 3 back side base of medium substrate and 5 axis of PCB；Medium front
One end of antenna arm 1 is connected with inner conductor weld 4, and impedance adjusts the fluting of electric capacity 2 and is arranged on medium front
On antenna arm 1, away from inner conductor weld 5mm, the length of groove is 1.2mm, width is 0.5mm, electricity
The numerical value of appearance is 1pF.
In conjunction with Fig. 4, the first wire a that medium front antenna arm 1 includes to be sequentially connected, the second wire b, privates c,
Privates d, the 5th wire e, the 6th wire f and the 7th wire g；
One end of first wire a is connected with inner conductor weld 4, and is led in the first wire a and coaxial cable
The basic base vertical of 4 place medium of body weld, the other end of the first wire a are connected with the second wire b, the first wire
A, the second wire b, privates c, privates d, the 5th wire e, the 6th wire f and the 7th wire g adjacent two
Section is vertically arranged.
The width of medium front antenna arm 1 and medium back side antenna arm 5 is 0.002 λ, and total length is 0.36 λ.
The centre frequency of Antenna Operation is 480MHz, carries a width of 5MHz, and the maximum gain of centre frequency is 0.92dB.
Fig. 5 is application schematic diagram of the present embodiment in uhf band gas meter, flow meter wireless kilowatt meter reading-out system；Fig. 6 is the present embodiment
Uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna stickogram, which achieves and coaxial line as seen from the figure
Matched well；Fig. 7 and Fig. 8 are the uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna of the present embodiment respectively
E face and H surface radiation directional diagram, show higher gain and preferable anti-metal ability.
From the foregoing, it will be observed that medium substrate of the present invention by the use of PCB surrounding rest as antenna, by element antenna
Both arms are printed on the tow sides of medium substrate after multiple 90 degree of bending respectively, realize antenna and PCB
Antenna size is greatly reduced while being directly integrated；While electric capacity is adjusted using impedance replace traditional barron structure,
Achieve element antenna to mate with the direct of coaxial cable, further while simple structure, easy to make, reduces cost
Achieve miniaturization；While by sides such as the path of rational deployment antenna both arms, the loading positions of adjustment impedance matching capacitances
Method reduces the metal shell at the gas meter, flow meter back side and internal interference of the PCB to antenna radiation performance, it is achieved that antenna spoke
Penetrate high-gain directed radiation of the directional diagram in gas meter, flow meter front upper place.The antenna is making full use of the internal PCB of gas meter, flow meter
On the basis of the vacant structure of surrounding and back metal shell are on antenna radiation performance impact, using dipole antenna configuration letter
Single, easy to make and good radiation characteristic, not only achieves low cost, miniaturization, low section, and has obtained relatively
High-gain and good bandwidth characteristic.
Claims (5)
1. a kind of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna, it is characterised in that including medium front day
Line arm (1), impedance adjust electric capacity (2), medium substrate (3), inner conductor weld (4), PCB circuit
Plate (5), medium back side antenna arm (6) and coaxial cable outer conductor weld (7)；
Medium substrate (3) extension is arranged on the surrounding of PCB (5), and medium substrate (3) is with regard to PCB
Circuit board (5) axis is symmetrical；
Medium front antenna arm (1) and medium back side antenna arm (6) are just being separately positioned on medium basic (3)
Face and the back side, and medium front antenna arm (1) and medium back side antenna arm (6) are with regard to the center of medium substrate (3)
In specular；Inner conductor weld (4) are arranged on medium substrate (3) front base and PCB
The position of intersecting point of circuit board (5) axis；Coaxial cable outer conductor weld (7) are arranged on medium substrate (3)
Back side base and the position of intersecting point of PCB (5) axis；
The one end in medium front antenna arm (1) is connected with inner conductor weld (4), and the impedance is adjusted
Economize on electricity is held (2) fluting and is arranged on medium front antenna arm (1), away from inner conductor weld (4) 3-10mm.
2. uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna according to claim 1, it is characterised in that
Medium front antenna arm (1) and medium back side antenna arm (6) are printed on medium base after bending by multiple 90 degree
On plate.
3. uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna according to claim 1 and 2, its feature
Be, medium front antenna arm (1) include be sequentially connected the first wire (a), the second wire (b), the 3rd
Wire (c), privates (d), the 5th wire (e), the 6th wire (f) and the 7th wire (g).
One end of first wire (a) is connected with inner conductor weld (4), and the first wire (a) with
The basic base vertical of shaft cable inner wire weld (4) place medium, the other end of the first wire (a) and the second wire
B () is connected, the first wire (a), the second wire (b), privates (c), privates (d), the 5th wire
E (), the 6th wire (f) and adjacent two sections of the 7th wire (g) are vertically arranged.
4. uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna according to claim 3, it is characterised in that
The width at medium front antenna arm (1) and medium back side antenna arm (6) is 0.002 λ, and total length is 0.36 λ, λ
For air medium wavelength.
5. uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna according to claim 4, it is characterised in that
Medium substrate (3) are identical with the material of PCB (4), are the FR-4 that relative dielectric constant is 4.4,
Thickness is 0.0009 λ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510527962.7A CN106486748A (en) | 2015-08-25 | 2015-08-25 | A kind of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510527962.7A CN106486748A (en) | 2015-08-25 | 2015-08-25 | A kind of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106486748A true CN106486748A (en) | 2017-03-08 |
Family
ID=58233257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510527962.7A Pending CN106486748A (en) | 2015-08-25 | 2015-08-25 | A kind of uhf band gas meter, flow meter wireless kilowatt meter reading-out system built-in antenna |
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| Country | Link |
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| CN (1) | CN106486748A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08204433A (en) * | 1995-01-25 | 1996-08-09 | Nippon Telegr & Teleph Corp <Ntt> | Bidirectional directivity printed board antenna |
| CN2735559Y (en) * | 2003-08-15 | 2005-10-19 | 富士康(昆山)电脑接插件有限公司 | Multi-frequency antenna |
| CN1925220A (en) * | 2005-08-24 | 2007-03-07 | 智易科技股份有限公司 | Triangular dipole antenna |
| CN202159771U (en) * | 2011-08-18 | 2012-03-07 | 广东盛路通信科技股份有限公司 | Built-in ultrahigh frequency omnidirectional antenna for wireless meter reading system |
| CN102683830A (en) * | 2011-03-11 | 2012-09-19 | 宏碁股份有限公司 | Mobile communication device and antenna structure of mobile communication device |
-
2015
- 2015-08-25 CN CN201510527962.7A patent/CN106486748A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08204433A (en) * | 1995-01-25 | 1996-08-09 | Nippon Telegr & Teleph Corp <Ntt> | Bidirectional directivity printed board antenna |
| CN2735559Y (en) * | 2003-08-15 | 2005-10-19 | 富士康(昆山)电脑接插件有限公司 | Multi-frequency antenna |
| CN1925220A (en) * | 2005-08-24 | 2007-03-07 | 智易科技股份有限公司 | Triangular dipole antenna |
| CN102683830A (en) * | 2011-03-11 | 2012-09-19 | 宏碁股份有限公司 | Mobile communication device and antenna structure of mobile communication device |
| CN202159771U (en) * | 2011-08-18 | 2012-03-07 | 广东盛路通信科技股份有限公司 | Built-in ultrahigh frequency omnidirectional antenna for wireless meter reading system |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20170308 |