CN104810608B - A kind of broadband small sized antenna - Google Patents
A kind of broadband small sized antenna Download PDFInfo
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- CN104810608B CN104810608B CN201510178563.4A CN201510178563A CN104810608B CN 104810608 B CN104810608 B CN 104810608B CN 201510178563 A CN201510178563 A CN 201510178563A CN 104810608 B CN104810608 B CN 104810608B
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Abstract
The present invention discloses a kind of broadband small sized antenna, including dielectric-slab, in addition to two rectangular metal rings, cross feed line and its metal covering being arranged on the dielectric-slab；Two rectangular metal rings use symmetrical spread pattern, and two rectangular metal rings are closed-loop, or two rectangular metal rings are correspondingly provided with two openings, and two opening correspondences are in the outer side edges of two rectangular metal rings, and two openings are symmetrical；The vertical line of cross feed line is located at the middle part of two rectangular metal rings, and the horizontal line of cross feed line is located at the following position of two rectangular metal rings, and the lower partial feeder of cross feed line extends downwardly into dielectric-slab lower end, is used as feed port；The another side of dielectric-slab is the metal covering where the lower partial feeder of cross feed line, and metal covering is the ground plane of the cross feed line.The antenna that the present invention is designed possesses broadband, small size, lightweight, easy processing, is easily integrated, the characteristics of cost is low.
Description
Technical field
The invention belongs to field of antenna, in particular a kind of broadband small sized antenna.
Background technology
It is broadband, small size, low section, lightweight, easy processing, easy of integration, low with the continuous improvement to antenna requirement
Cost antenna is the important directions of antenna growth requirement.Micro-strip antenna possesses lightweight, easy processing, easy of integration, inexpensive etc.
Remarkable advantage, but take into account broadband and small size simultaneously there is great challenge.Vivaldi antennas possess ultra wide band characteristic, but its
Size depends on low frequency operation wavelength, it is difficult to accomplish small size.Microstrip line paster antenna has the advantages that low section, can also pass through
The technologies such as fluting, folding, point shape realize miniaturization, it can be difficult to accomplishing broadband.
The content of the invention
For the deficiency of above-mentioned scheme, the present invention proposes a kind of broadband small sized antenna.
The technical scheme of the invention is：A kind of broadband small sized antenna, including dielectric-slab, in addition to it is arranged at Jie
Two rectangular metal rings, cross feed line and its metal covering on scutum；Two rectangular metal rings use symmetrical arrangement
Form, two rectangular metal rings are closed-loop, or two rectangular metal rings are correspondingly provided with two openings, two shapes for being open
In condenser symbol shape, two opening correspondences are located in the outer side edges of two rectangular metal rings, and two openings are symmetrical；
The vertical line of the cross feed line is located at the middle part of two rectangular metal rings, and the horizontal line of the cross feed line is located at
The following position of two rectangular metal rings, the lower partial feeder of the cross feed line extends downwardly into the dielectric-slab lower end,
It is used as feed port；
The another side of the dielectric-slab is the metal covering where the lower partial feeder of the cross feed line, and the metal covering is
Metal coat with certain area, the metal covering is the ground plane of the cross feed line.
As further preferred scheme, two rectangular metal rings are located at the one of the dielectric-slab with the cross feed line
Face；The metal covering is located at the another side of the dielectric-slab.
As further preferred scheme, two rectangular metal rings are located at the one side of the dielectric-slab with the metal covering；This ten
Font feed line is located at the another side of the dielectric-slab.
As further preferred scheme, the broadband small sized antenna is used alone or multiple antenna elements composition day
Linear array is used.
As further preferred scheme, the lower partial feeder of the cross feed line using multistage different length, no
The cross feed line connection composition of same width, different arrangement forms.
As further preferred scheme, the dielectric constant of the dielectric-slab is 2~5.
As further preferred scheme, the processing technology of the metal covering uses etch or laser ablation method.
As further preferred scheme, the broadband small sized antenna realizes work frequency using size reduction or increase
The regulation of band.
It is used as further preferred scheme, the lower partial feeder folding of the cross feed line, in lateral semicircle
Arc overshooting shape.
The broadband small sized antenna of the present invention uses two rectangular metal ring, the cross feed lines being symmetrically arranged
The design of structure type and metal covering, possess simple in construction, broadband, small size, low section, lightweight, easy processing, easily
Integrated, inexpensive the advantages of.
Brief description of the drawings
Fig. 1 is the structural representation of present pre-ferred embodiments 1；
Fig. 2 is Fig. 1 front view；
Fig. 3 is Fig. 1 aerial voltage standing-wave ratio figure；
Fig. 4 is Fig. 1 antenna gain patterns；
Fig. 5 is the structural representation of present pre-ferred embodiments 2；
Fig. 6 is Fig. 5 aerial voltage standing-wave ratio figure；
Fig. 7 is Fig. 5 antenna gain patterns；
Fig. 8 is the structural representation of present pre-ferred embodiments 3；
Fig. 9 is Fig. 8 aerial voltage standing-wave ratio figure；
Figure 10 is Fig. 8 antenna gain patterns.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further described.It should be appreciated that specific embodiment described herein is not used to limit only to explain the present invention
The fixed present invention.
With reference to Fig. 1, a kind of broadband small sized antenna of the invention is to use microstrip line construction form, i.e. top layer cabling
Mode realize.The broadband small sized antenna of the present invention includes two rectangular metal rings 1, cross feed line 2, dielectric-slabs
3rd, metal covering 4.
Two rectangular metal rings 1, cross feed line 2, metal coverings 4 are arranged at the surface of dielectric-slab 3, and are certain
The metal coat of thickness, conventional for copper clad layers, thickness is 18 μm.
Two rectangular metal rings 1 use symmetrical spread pattern, and two rectangular metal rings 1 are correspondingly provided with two openings 5,
And there is a bit of gap in 5 upper and lower side of opening of condenser symbol form, i.e., two in two the configured similarly to that of opening 5, the seam
The size of gap can also be able to be the ring-type of closure for the metal rectangular becket 1 of 0mm, i.e., two.Two openings 5 are in two rectangle gold
In the outer side edges for belonging to ring 1, and two openings 5 are symmetrical.
The vertical line of cross feed line 2 is located at the middle part of two rectangular metal rings 1, the horizontal line position of cross feed line 2
In the following position of two rectangular metal rings 1.The lower partial feeder of cross feed line 2 is extended downwardly under dielectric-slab 3
End, is used as feed port.The another side of dielectric-slab 3 where the lower partial feeder of cross feed line 2 is used as metal covering 4, gold
Category face 4 is the metal coat for coating certain area, and earthy as cross feed line 2.The rectangular block of bottom of the present invention
For feed port (the antenna in kind rectangular block is not present).
Two rectangular metal rings 1, cross feed line 2 and metal covering 4 have two kinds of distribution forms, and one kind is two rectangles
Becket 1 and cross feed line 2 are in the same face of dielectric-slab 3, another side of the metal covering 4 in dielectric-slab；Another is two
Rectangular metal ring 1 and metal covering 4 are in the same face of dielectric-slab 3, another side of the cross feed line 2 in dielectric-slab 3.
As metal coat two rectangular metal rings 1, cross feed line 2, metal covering 4 can using etch and
Prepared by laser ablation method, generally, the precision of photoetching process is higher than etch.Microstrip line construction is often two-sided with preparation method
The micro-strip antenna of corresponding construction form is prepared in copper-clad plate using chemical corrosion method.
The broadband small sized antenna of the present invention can also use the mode system of the structure type, i.e. internal layer cabling of strip line
Make.The strip lines configuration form and the micro-strip wire structure type main distinction are that one is surface cabling in dielectric-slab 3, separately
One be dielectric-slab 3 inside cabling.It is easy to carry out conversion designs for those skilled in the art.
The present invention is using two rectangular metal rings 1 of symmetric design as the radiator of the antenna, and this kind of structure type can
So that the antenna forms resonance radiation under less size, the antenna is conducive to realize the structure type of small size.By excellent
Change the length and width of two rectangular metal rings 1 that design is symmetrically arranged when length, two 5 gap lengths of opening, can adjust should
The resonant frequency of antenna, makes the multiple resonant frequencies of the antenna close to connecting together, forms wide working band.
The antenna of the present invention uses the couple feed of cross feed line 2, and this kind of feeding classification structure type is simple, prepares and adds
Work is easy.The present invention structure design have low section, lightweight, easy processing, it is easy of integration, inexpensive the characteristics of.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention is compared with conventional microstrip linear oscillator antenna, preferably
Taken into account broadband with miniaturization advantage, while the antenna structure form is simple, it is easy to process.
In order to which the present invention is further illustrated, now so that case is embodied and is described with reference to the accompanying drawings.
Embodiment 1
The antenna of the present embodiment 1 uses microstrip line construction, shown referring to Figures 1 and 2, two open rectangle rings 1 and cross
Shape feeder line 2 is in the same face of dielectric-slab 3, another side of the metal covering 4 in dielectric-slab 3.Cross feeder line 2 passes through gap
Coupling carries out feed excitation to two open rectangle rings 1.The antenna is processed into using double face copper by chemical corrosion method,
Copper clad layers thickness is 18 μm, and dielectric-slab uses Rogers5880 dielectric-slabs, dielectric constant 2.2.
The antenna core dimensional parameters of the present embodiment 1 are：Two bond length b=11mm of rectangular metal ring 1, long edge lengths
Lz=26mm, the width a=26mm of dielectric-slab 3, thickness 0.508mm, metal covering 4 is rectangular, and its width is with dielectric-slab 3 with wide, height
Spend for ld=19.25mm.
The lower partial feeder of cross feed line 2 is using 2 grades of impedance variations, i.e., by the micro-strip of 2 section different in width
Line is connected and composed, and the microstrip line port identity impedance of bottom is 50 Ω, in order to realize impedance matching with extraneous port.Cross
The inner side edge and the following gap that there is one fixed width of shape feed line 2 and two rectangular metal rings 1, whole antenna are right in left and right
Claim structure.
The antenna of the microstrip line construction form possesses good broadband operation performance in 2.2GHz-5.2GHz frequency bands,
Its voltage standing wave ratio (VSWR) is less than 2, referring to Fig. 3.In working band, it is special that the antenna radiation pattern possesses good isotropism
Levy, this has benefited from the antenna structure and possesses good bilateral symmetry, using 0.5GHz as interval in working band, choose
2.5GHz, 3GHz, 3.5GHz, 4GHz, 4.5GHz, 5GHz6 Frequency points depict the Antenna Operation in above-mentioned frequency as representative
360 degree of rate point pitching face, every 1 degree of interval (i.e. theta angles), 360 degree of azimuth plane, every 5 degree of intervals (i.e. phi angles) day
Line gain pattern.As a result referring to Fig. 4.The antenna radiation pattern has good isotropism, and antenna greatest irradiation direction is in water
In plane (i.e. theta=90 degree and -90 degree directions), this is very similar with the dipole antenna being disposed vertically.
Compared with microstrip line dipole antenna, the Antenna Operation bandwidth is far wider than microstrip line element antenna, and VSWR is less than 2
Relative bandwidth up to 81.8%.Calculated with 2.2GHz, microstrip line dipole antenna oscillator arms length is about 68mm, and this antenna spoke
The length for penetrating arm is 26mm, much smaller than microstrip line element antenna.
Embodiment 1 shows preferable using the microstrip line construction form antenna of two rectangular metal rings 1 and cross feed line 2
The advantage for having taken into account broadband and small size.
Embodiment 2
As shown in figure 5, the difference of embodiment 2 and the structure of embodiment 1 is essentially from the change to cross feed line 2, its
Its portion structure form keeps constant.In this embodiment 2, connection that section of vertical line of feed port of cross feed line 2 is entered
Folding is gone, in "U" shaped.Cross feed line can effectively be shortened using the cross feed line 2 of folded form
Road height, reduces the height of whole antenna.Cross feed line 2 is fed at turning by the way of corner cut to reduce cross
The reflection of circuit.
In the present embodiment 2, the height of metal covering 4 is reduced to 12mm by the 19.25mm in embodiment 1.The antenna electric of embodiment 2
Press standing-wave ratio (VSWR) and gain pattern as shown in Figure 6 and Figure 7.Changed by cross feeder line, the beamwidth of antenna is omited
There is reduction, VSWR is less than the 2 a width of 2.5GHz-5.1GHz of band.By the Asymmetric ef- fect of cross feed line 2, antenna gain
Directional diagram symmetry has certain variation.
Embodiment 3
As shown in figure 8, the main distinction of embodiment 3 and embodiment 1 is two rectangular metal rings 1 and ten in embodiment 3
Font feed line 2 is located at the two sides of dielectric-slab 3 respectively, and it is same that two of which rectangular metal ring 1 and metal covering 4 are located at dielectric-slab
Face.In the present embodiment 3, there is certain reduction in the gap between two inner side edges of rectangular metal ring 1 and side, cross feed line 2
The position overlapped below with two rectangular metal rings 1, and the horizontal center line and two of the horizontal line of cross feed line 2 are moved on on horizontal line
The following horizontal center line of individual rectangular metal ring 1 is overlapped.
Antenna rapidoprint and preparation method are in the same manner as in Example 1 in embodiment 3, micro-strip antenna kernel size parameter
The only height of metal covering 4 is changed, and its height is ld=21.43mm.Antenna is symmetrical with its horizontal center line.
The frequency band that the voltage standing wave ratio (VSWR) of antenna is less than 2 in embodiment 3 is 2.9GHz-4.9GHz, as shown in figure 9,
Compared to embodiment 1, bandwidth of operation slightly has reduction.Antenna gain patterns in bandwidth of operation are as shown in Figure 10.As can be seen from Figure,
Because antenna has good bilateral symmetry, its directional diagram also shows good isotropism.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (9)
1. a kind of broadband small sized antenna, including dielectric-slab, it is characterised in that：Also include two be arranged on the dielectric-slab
Individual rectangular metal ring, cross feed line and its metal covering；Two rectangular metal rings use symmetrical spread pattern, two squares
Shape becket is closed-loop, or two rectangular metal shapes are correspondingly provided with two openings, and the shapes of two openings are in condenser symbol
Shape, two opening correspondences are located in the outer side edges of two rectangular metal rings, and two openings are symmetrical；
The vertical line of the cross feed line is located at the middle part of two rectangular metal rings, and the horizontal line of the cross feed line is located at two
The following position of rectangular metal ring, the lower partial feeder of the cross feed line extends downwardly into the dielectric-slab lower end, as
Feed port；
The another side of the dielectric-slab where the lower partial feeder of the cross feed line is the metal covering, the metal covering be with
The metal coat of certain area, the metal covering is the ground plane of the cross feed line.
2. broadband small sized antenna as claimed in claim 1, it is characterised in that：Two rectangular metal rings are presented with the cross
Electric wire is located at the one side of the dielectric-slab；The metal covering is located at the another side of the dielectric-slab.
3. broadband small sized antenna as claimed in claim 1, it is characterised in that：Two rectangular metal rings and metal covering position
In the one side of the dielectric-slab；The cross feed line is located at the another side of the dielectric-slab.
4. broadband small sized antenna as claimed in claim 1, it is characterised in that：The broadband small sized antenna is used alone
Or multiple antenna element composition antenna arrays are used.
5. broadband small sized antenna as claimed in claim 1, it is characterised in that：The lower part feed of the cross feed line
Line is constituted using the cross feed line connection of multistage different length, different in width, different arrangement forms.
6. broadband small sized antenna as claimed in claim 1, it is characterised in that：The dielectric constant of the dielectric-slab is 2~5.
7. broadband small sized antenna as claimed in claim 1, it is characterised in that：The processing technology of the metal covering is using corrosion
Method or laser ablation method.
8. broadband small sized antenna as claimed in claim 1, it is characterised in that：The broadband small sized antenna uses size
Reduce or increase to realize the regulation of working band.
9. broadband small sized antenna as claimed in claim 5, it is characterised in that：The lower part feed of the cross feed line
Line folding, in lateral semi arch overshooting shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510178563.4A CN104810608B (en) | 2015-04-15 | 2015-04-15 | A kind of broadband small sized antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510178563.4A CN104810608B (en) | 2015-04-15 | 2015-04-15 | A kind of broadband small sized antenna |
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| Publication Number | Publication Date |
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| CN104810608A CN104810608A (en) | 2015-07-29 |
| CN104810608B true CN104810608B (en) | 2017-09-29 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030201941A1 (en) * | 2002-04-26 | 2003-10-30 | Masayoshi Aikawa | Multi-element planar array antenna |
| CN102005645A (en) * | 2010-12-02 | 2011-04-06 | 哈尔滨工程大学 | Miniaturized dual-frequency antenna |
| CN103094681A (en) * | 2013-01-18 | 2013-05-08 | 厦门大学 | Complementary split ring resonator array lamination coupling compass double frequency micro-strip antenna |
| CN103490174A (en) * | 2013-09-24 | 2014-01-01 | 华南理工大学 | Circularly-polarized broadband base station antenna |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3954435B2 (en) * | 2002-04-26 | 2007-08-08 | 日本電波工業株式会社 | 2-element and multi-element array type slot antenna |
-
2015
- 2015-04-15 CN CN201510178563.4A patent/CN104810608B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030201941A1 (en) * | 2002-04-26 | 2003-10-30 | Masayoshi Aikawa | Multi-element planar array antenna |
| CN102005645A (en) * | 2010-12-02 | 2011-04-06 | 哈尔滨工程大学 | Miniaturized dual-frequency antenna |
| CN103094681A (en) * | 2013-01-18 | 2013-05-08 | 厦门大学 | Complementary split ring resonator array lamination coupling compass double frequency micro-strip antenna |
| CN103490174A (en) * | 2013-09-24 | 2014-01-01 | 华南理工大学 | Circularly-polarized broadband base station antenna |
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| CN104810608A (en) | 2015-07-29 |
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