CN106684544A - Miniaturized unipolar ultra-wideband antenna - Google Patents
Miniaturized unipolar ultra-wideband antenna Download PDFInfo
- Publication number
- CN106684544A CN106684544A CN201611156136.7A CN201611156136A CN106684544A CN 106684544 A CN106684544 A CN 106684544A CN 201611156136 A CN201611156136 A CN 201611156136A CN 106684544 A CN106684544 A CN 106684544A
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- Prior art keywords
- impedance matching
- transmission line
- minor matters
- asymmetric
- matching input
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- 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
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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Abstract
The invention discloses a miniaturized unipolar ultra-wideband (UWB) antenna. The antenna comprises a substrate, a circular radiation patch, ground plates, and an impedance matching input transmission line. One corner of each ground plate near the circular radiation patch adopts a triangular corner cut technology. Two asymmetric stubs extend from the right side of the ground plates, wherein a first asymmetric stub is parallel to the impedance matching input transmission line, and a second asymmetric stub is perpendicular to the impedance matching input transmission line and is bent towards the bottom end. One end of the impedance matching input transmission line is connected with the bottom end of the circular radiation patch, and the other end is connected with the bottom end of the substrate. The two ground plates are arranged on the two sides of the impedance matching input transmission line respectively. The circular radiation patch, the impedance matching input transmission line and the ground plates are arranged on the two sides of the substrate respectively. By adding the asymmetric radiation stubs to the ground plates, the size of the antenna is reduced while excellent UWB characteristic is maintained, and the antenna can be easily integrated into a mobile handheld terminal.
Description
Technical field
The invention belongs to antenna technical field, more particularly to a kind of miniaturization monopole ultra-wideband antenna.
Background technology
From American Communications federation committee (FCC) by 3.1GHz-10.6GHz frequency ranges input it is civilian since, radio communication system
Unite and the requirement that antenna covers bandwidth is also improved therewith, ultra broadband (UWB) antenna is with its high transmission rates, low transmitting power, anti-dry
Disturb ability it is strong the advantages of obtained extensive concern and research.On the other hand, with mobile handheld terminal and microwave integrated circuit
Fast development, the design of antenna miniaturization is increasingly becoming a kind of trend.The size of monopole UWB antennas only has traditional antithesis
/ 2nd of oscillator structure antenna, about quarter-wave, can realize UWB characteristics and change substantially with frequency,
It is integrated with radio frequency PCB circuits easily, in view of plurality of advantages, monopole UWB antennas are widely used in UWB Antenna Design.Closely
Nian Lai, Chinese scholars propose various miniaturization monopole UWB antennas in succession, but are extending symmetrical minor matters side
Face, mostly without reference to minor matters are asymmetric, minor matters bending reducing space, situations such as load many minor matters and realize multi-resonant, and
Most antennas do not account for fine setting effect of the floor factor in UWB frequency ranges.
In sum, existing monopole UWB antennas miniaturization and it is broadband have that size is larger, it is broadband not enough
Defect.
The content of the invention
It is an object of the invention to provide a kind of miniaturization monopole ultra-wideband antenna, it is intended to solve existing monopole
UWB antennas miniaturization and it is broadband have that size is larger, broadband not enough problem.
The present invention is achieved in that a kind of miniaturization monopole ultra-wideband antenna, the miniaturization monopole ultra broadband
Antenna is provided with：
Substrate；
Circular radiation paster；
Earth plate；Earth plate adopts triangle corner cut near one jiao of circular radiation paster, and two are extended on the right side of earth plate
Individual asymmetric minor matters, the first asymmetric minor matters and impedance matching input transmission line is parallel, the second asymmetric minor matters and impedance matching
Input transmission line is vertical, and the second asymmetric minor matters are bent towards bottom direction；
Impedance matching is input into transmission line；One end of impedance matching input transmission line is connected with the bottom of circular radiation paster,
The other end is connected with the bottom of substrate, and impedance matching input transmission line both sides are provided with two pieces of earth plates；
Circular radiation paster, impedance matching input transmission line and earth plate are lived apart in the both sides of substrate.
Further, the substrate adopts dielectric constant for 4.4, and thickness is the FR4_epoxy medium plates of 1mm, and its width is
20mm, is highly 21mm.
Further, the earth plate adopts triangle beveling technique near one jiao of circular radiation paster.
Further, the radius of the circular radiation paster is 5mm.
Further, the impedance matching input transmission line and the distance of both sides earth plate are 0.3mm.
Further, the impedance matching input transmission line selects 50 Ω micro-strip coplanar waveguide CPW, and width is 2.6mm, height
For 7.3mm.
Further, the earth plate is highly 7mm, and left side ground plate width is 4.4mm, and right side ground plate width is
8.4mm。
Further, the described first asymmetric minor matters and impedance matching input transmission line is parallel, the second asymmetric minor matters and resistance
Anti- matching input transmission line is vertical, and it is bent towards bottom direction, and bending part length keeps and impedance matching input transmission
Line length is identical.
Further, the described first asymmetric minor matters and the width of the second asymmetric minor matters are 1mm, the first asymmetric minor matters
Highly it is 12mm~16mm, the height of the second asymmetric minor matters bending part is the distance of 7mm, bending part and right side ground plate
For 3mm.
The miniaturization monopole ultra-wideband antenna that the present invention is provided, by reducing ground-plane size and radiating element size,
And extend asymmetric minor matters on earth plate, make monopole UWB antennas become compacter, 20 × 21 × 1mm of overall dimensions3。
By carrying out parameter optimization to radiation patch and earth plate so that the antenna has outstanding UWB special while meeting miniaturization
Property；By adding the first asymmetric minor matters, the resonance at UWB antenna low frequencies is compensate for, circular radiation paster is asymmetric with first
Minor matters combine, and excite multiple radiation modes in UWB frequency ranges, are overlapped mutually, and antenna can be made to cover 3.1GHz- well
10.6GHz frequency ranges.Antenna Operation bandwidth low-frequency cut-off frequency can realize antenna by the first asymmetric minor matters independent regulation
Miniaturization；By adding the second asymmetric minor matters, an intermediate frequency resonance is provided at 6.4GHz.Additionally, asymmetric by second
Minor matters are bent, and efficiently reduce antenna size.
The present invention considers the impact of ground-plane size UWB frequency ranges performance whole to antenna, excellent by adjustment ground board size
The performance of Mid Frequency is changed；Floor edge triangle beveling technique is employed near impedance matching input transmission line, is reduced
Electromagnetic coupled between radiation patch and floor, improves the performance near high frequency.By adding asymmetric radiation branch in earth plate
Section, strengthens due to the deficiency of the undersized middle low-frequency range performance for causing, while excellent UWB characteristics are kept effectively
The size of antenna is reduced, is easy to antenna in the integrated of mobile handheld terminal.
Description of the drawings
Fig. 1 is the structure chart of miniaturization monopole ultra-wideband antenna provided in an embodiment of the present invention；
In figure：A () is top view, figure (b) is side view.
Fig. 2 is the asymmetric minor matters length of miniaturization monopole ultra-wideband antenna provided in an embodiment of the present invention first to S11
The impact schematic diagram of parameter.
Fig. 3 is that the emulation of miniaturization monopole ultra-wideband antenna provided in an embodiment of the present invention and actual measurement S11 and VSWR are bent
Line schematic diagram.
Fig. 4 is surface current of the miniaturization monopole ultra-wideband antenna provided in an embodiment of the present invention under 3GHz and 6GHz
Density Distribution schematic diagram.
Fig. 5 is that the different frequency radiation direction of miniaturization monopole ultra-wideband antenna provided in an embodiment of the present invention is illustrated
Figure.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is not used to only to explain the present invention
Limit the present invention.
The application principle of the present invention is explained in detail below in conjunction with the accompanying drawings.
As shown in figure 1, miniaturization monopole ultra-wideband antenna provided in an embodiment of the present invention includes：Substrate, circular radiation
Paster, impedance matching input transmission line and earth plate, also including two asymmetric minor matters, wherein, the present invention is in traditional monopole
On the basis of UWB antennas, ground board size and radiating element size are reduced, the surface of substrate (1) is provided with circular radiation paster
(2), impedance matching input transmission line (4) and earth plate (3), circular radiation paster, impedance matching input transmission line and earth plate
In the both sides of substrate, one end of impedance matching input transmission line is connected with the bottom of circular radiation paster for separation, the other end and base
The bottom connection of plate, impedance matching input transmission line both sides are provided with two pieces of earth plates, and extension two is asymmetric on the right side of earth plate
Minor matters, the second asymmetric minor matters (6) are bent.
Described substrate (1) adopts dielectric constant for 4.4, and thickness is the FR4_epoxy medium plates of 1mm, and its width is
20mm, is highly 21mm；One jiao of close circular radiation paster (2) of earth plate (3) employs triangle beveling technique；Described
The radius of circular radiation paster (2) is 5mm；Impedance matching input transmission line (4) is 0.3mm with the distance of both sides earth plate (3)；
From 50 Ω micro-strip coplanar waveguide CPW, width is 2.6mm to described impedance matching input transmission line (4), is highly 7.3mm；Institute
The earth plate (3) stated highly is 7mm, and left side ground plate width is 4.4mm, and right side ground plate width is 8.4mm；First is asymmetric
Minor matters (5) are parallel with impedance matching input transmission line (4), and the second asymmetric minor matters (6) are vertical with impedance matching input transmission line,
And bend it towards bottom direction, bending part length keeps identical with impedance matching input length of transmission line；Described first is non-
Symmetrical minor matters (5) are 1mm with the width of the second asymmetric minor matters (6), and the height of the first asymmetric minor matters is 12mm~16mm, the
The height of two asymmetric minor matters bending parts is 7mm, and bending part is 3mm with the distance of right side ground plate (3).
Embodiment 1
Structure provided in an embodiment of the present invention as shown in figure 1, wherein (a) be antenna top view, figure (b) regard for antenna side
Figure.Including：Substrate, circular radiation paster, impedance matching input transmission line and earth plate, also including two asymmetric minor matters.This
Invention reduces ground board size and radiating element size on the basis of the sub- UWB antennas of traditional monopole；The surface of substrate 1 is provided with
Circular radiation paster 2, impedance matching is input into transmission line 4 and earth plate 3, circular radiation paster 2, impedance matching input transmission line 4
Live apart in the both sides of substrate 1 with earth plate 3；One end of impedance matching input transmission line 4 connects with the bottom of circular radiation paster 2
Connect, the other end is connected with the bottom of substrate 1；Impedance matching input transmission line 4 both sides are provided with two pieces of earth plates 3；It is right in earth plate
Side extends two asymmetric minor matters 5 and 6, and the second asymmetric minor matters 6 are bent.Whole antenna designs are simple, size
It is compact, 20 × 21 × 1mm of overall dimensions3, it is close with unitary coin-size.
Substrate 1 adopts dielectric constant for 4.4, and thickness is the FR4_epoxy medium plates of 1mm, and its width is 20mm, is highly
21mm；Earth plate 3 employs triangle beveling technique near a jiao of circular radiation paster；The radius of circular radiation paster 2 is
5mm；It is 0.3mm that impedance matching is input into transmission line 4 with the distance of both sides earth plate 3；Impedance matching input transmission line 4 selects 50 Ω
Micro-strip coplanar waveguide CPW, width is 2.6mm, is highly 7.3mm；The height of earth plate 3 is 7mm, and left side ground plate width is
4.4mm, right side ground plate width is 8.4mm；First asymmetric minor matters 5 are parallel with impedance matching input transmission line, and second is non-right
Claim minor matters 6 vertical with impedance matching input transmission line 4, the second asymmetric minor matters 6 are bent towards bottom direction, the length of bending part
Degree keeps identical with the impedance matching input length of transmission line 4；First asymmetric minor matters 5 are with the width of the second asymmetric minor matters 6
1mm, the height of the second asymmetric minor matters bending part is 7mm, and bending part is 3mm with the distance of right side ground plate 3.
Fig. 2 provides impact of the length of the first asymmetric minor matters 5 to antenna S11 parameters.As can be seen that the first asymmetric branch
The change of section length has an impact to low-frequency resonant point, and the curve at other frequencies is held essentially constant.Low-frequency resonant point with
The increase of the first asymmetric minor matters length is moved to the left, gradually less than 3GHz.Therefore, it can by adjusting the first asymmetric minor matters
Length adjustment UWB antenna low-frequency cut-off frequency.
Embodiment 2
As shown in figure 1, the structure of this example is same as Example 1, its different parameters is：First asymmetric minor matters 5
Length is 14mm.
The application effect of the present invention is explained in detail with reference to emulation.
Fig. 3 gives present invention emulation and actual measurement S11 parameters and voltage standing wave ratio VSWR.As can be seen that-the 10dB of antenna
Bandwidth substantially covers 3.1GHz-10.6GHz frequency ranges, and the introducing of the first asymmetric minor matters 5 causes antenna to occur at 3GHz
Resonance.Error and survey when the micro difference of emulation and measured data is accuracy, the day wire bonding SAM head due to antenna making
Ambient environmental factors are caused during amount.
Fig. 4 gives surface current density distribution measuring when realizing f=3GHz, 6GHz using the antenna shown in accompanying drawing 1 and ties
Really.As can be seen that the electric current of antenna is concentrated mainly in the asymmetric minor matters in two, floor, so as to demonstrate adding for asymmetric minor matters
Plus the improvement of centering low-frequency range performance.
Fig. 5 gives and realizes aerial radiation orientation measurement result using the antenna shown in accompanying drawing 1, wherein (a) (b) (c) point
Not Biao Shi frequency be 3GHz, 6.2GHz and 9GHz when antenna simulated radiation directional diagram.As can be seen that radiation pattern with
The change for frequency is relatively stable.In xoy planes, antenna has the radiation characteristic of similar electrode couple " ∞ ", due to unsymmetrical knot
The loading minor matters of structure, inevitable to cause the asymmetric of " ∞ ", inner side is shown in solid in such as Fig. 4；In yoz planes, antenna
Substantially accurate isotropic radiation characteristic is kept.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (9)
1. a kind of miniaturization monopole ultra-wideband antenna, it is characterised in that the miniaturization monopole ultra-wideband antenna is provided with：
Substrate；
Circular radiation paster；
Earth plate；Earth plate adopts triangle corner cut near one jiao of circular radiation paster, extend on the right side of earth plate two it is non-
Symmetrical minor matters, the first asymmetric minor matters are parallel with impedance matching input transmission line, and the second asymmetric minor matters are input into impedance matching
Transmission line is vertical, and the second asymmetric minor matters are bent towards bottom direction；
Impedance matching is input into transmission line；One end of impedance matching input transmission line is connected with the bottom of circular radiation paster, another
End is connected with the bottom of substrate, and impedance matching input transmission line both sides are provided with two pieces of earth plates；
Circular radiation paster, impedance matching input transmission line and earth plate are lived apart in the both sides of substrate.
2. miniaturization monopole ultra-wideband antenna as claimed in claim 1, it is characterised in that the substrate adopts dielectric constant
For 4.4, thickness for 1mm FR4_epoxy medium plates, its width is 20mm, is highly 21mm.
3. miniaturization monopole ultra-wideband antenna as claimed in claim 1, it is characterised in that the earth plate is near circle spoke
One jiao of paster is penetrated using triangle beveling technique.
4. miniaturization monopole ultra-wideband antenna as claimed in claim 1, it is characterised in that the half of the circular radiation paster
Footpath is 5mm.
5. miniaturization monopole ultra-wideband antenna as claimed in claim 1, it is characterised in that the impedance matching input transmission
Line is 0.3mm with the distance of both sides earth plate.
6. miniaturization monopole ultra-wideband antenna as claimed in claim 1, it is characterised in that the impedance matching input transmission
With 50 Ω micro-strip coplanar waveguide CPW, width is 2.6mm, is highly 7.3mm for line selection.
7. miniaturization monopole ultra-wideband antenna as claimed in claim 1, it is characterised in that the earth plate is highly 7mm,
Left side ground plate width is 4.4mm, and right side ground plate width is 8.4mm.
8. miniaturization monopole ultra-wideband antenna as claimed in claim 1, it is characterised in that the first asymmetric minor matters with
Impedance matching input transmission line is parallel, and the second asymmetric minor matters are vertical with impedance matching input transmission line, and by it towards bottom side
To bending, bending part length keeps identical with impedance matching input length of transmission line.
9. miniaturization monopole ultra-wideband antenna as claimed in claim 8, it is characterised in that the first asymmetric minor matters with
The width of the second asymmetric minor matters is 1mm, and the height of the first asymmetric minor matters is 12mm~16mm, and the second asymmetric minor matters bend
Partial height is 7mm, and bending part is 3mm with the distance of right side ground plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611156136.7A CN106684544B (en) | 2016-12-14 | 2016-12-14 | A kind of miniaturization monopole ultra-wideband antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611156136.7A CN106684544B (en) | 2016-12-14 | 2016-12-14 | A kind of miniaturization monopole ultra-wideband antenna |
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| Publication Number | Publication Date |
|---|---|
| CN106684544A true CN106684544A (en) | 2017-05-17 |
| CN106684544B CN106684544B (en) | 2019-06-28 |
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| CN201611156136.7A Active CN106684544B (en) | 2016-12-14 | 2016-12-14 | A kind of miniaturization monopole ultra-wideband antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729562A (en) * | 2019-10-22 | 2020-01-24 | 西南交通大学 | Miniaturized ultra-wideband antenna loaded with high-dielectric copper-clad medium |
| CN117691349A (en) * | 2023-12-26 | 2024-03-12 | 青岛柯锐思德电子科技有限公司 | On-board miniaturized UWB monopole antenna and angle measurement combination |
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2016
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729562A (en) * | 2019-10-22 | 2020-01-24 | 西南交通大学 | Miniaturized ultra-wideband antenna loaded with high-dielectric copper-clad medium |
| CN117691349A (en) * | 2023-12-26 | 2024-03-12 | 青岛柯锐思德电子科技有限公司 | On-board miniaturized UWB monopole antenna and angle measurement combination |
| CN117691349B (en) * | 2023-12-26 | 2024-07-16 | 青岛柯锐思德电子科技有限公司 | On-board miniaturized UWB monopole antenna and angle measurement combination |
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| Publication number | Publication date |
|---|---|
| CN106684544B (en) | 2019-06-28 |
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