CN106953164A - A kind of miniature antenna loaded based on capacitive - Google Patents
A kind of miniature antenna loaded based on capacitive Download PDFInfo
- Publication number
- CN106953164A CN106953164A CN201710139252.6A CN201710139252A CN106953164A CN 106953164 A CN106953164 A CN 106953164A CN 201710139252 A CN201710139252 A CN 201710139252A CN 106953164 A CN106953164 A CN 106953164A
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- China
- Prior art keywords
- antenna
- metal
- capacitive
- metal drum
- earth plate
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Classifications
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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
-
- 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
-
- 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
Abstract
The present invention relates to antenna miniaturization techniques, and in particular to a kind of miniature antenna loaded based on capacitive, including feeding coaxial lines, and the metal drum and earth plate be arrangeding in parallel, the metal drum are located on earth plate；Also include the metal dish being set in parallel between the metal drum and earth plate, the feeding coaxial lines connect the metal drum and earth plate respectively through the metal dish；Insulating support support is respectively arranged between the metal drum and metal dish, between the metal dish and the earth plate.The miniature antenna overcomes antenna size excessive to using the inconvenience caused, the miniaturization of antenna is effectively realized in the case where not reducing bandwidth of operation, while designing easy.Antenna is omni-directional antenna, there is greatest irradiation in the horizontal direction, and 70% 86% high efficiency can be kept in working band.Antenna overall height 40cm, the about half of traditional antenna size, realize the purpose of antenna miniaturization.
Description
Technical field
The invention belongs to antenna miniaturization techniques field, more particularly to a kind of miniature antenna loaded based on capacitive.
Background technology
Antenna is the part being coupled with the radio wave of free space.In theory, the size of antenna and required
The wavelength of the radio wave of transmitting-receiving is into positive correlation, and the wavelength of radio wave is inversely proportional with its frequency.In other words when need hair
During the radio wave frequency very little penetrated, corresponding wavelength it is just very long, it is necessary to dual-mode antenna it is just very big, and the size mistake of antenna
Greatly, it will certainly be used for bringing inconvenience.Accordingly, it would be desirable to the research minimized to antenna, making antenna, on the one hand energy is normal
Radiation needs the electromagnetic wave of wavelength, on the other hand reduces the size as much as possible, is easy to produce and uses.
As a rule, the miniaturization of antenna is difficult to accomplish, because this will cause reduction and the efficiency of the beamwidth of antenna
Decline.By changing the shape of antenna, although the method for addition matching network can improve the performance of antenna, to a certain extent
Reduce the size of antenna, but most of other performance including bandwidth can be sacrificed, thus it is small-sized by loading technique broadening
Changing the beamwidth of antenna turns into the precondition that miniature antenna puts into practical application.
And the miniaturization of antenna at present mainly uses the method that perception is loaded, the research loaded to capacitive is few.This
It is that we probe into the capacitive loading device of broadening miniature antenna bandwidth and the background of method.
The content of the invention
Effectively realize what is loaded based on capacitive in the case where not reducing bandwidth of operation it is an object of the invention to provide a kind of
Miniature antenna.
To achieve the above object, the technical solution adopted by the present invention is：A kind of miniature antenna loaded based on capacitive, bag
Feeding coaxial lines, and the metal drum and earth plate be arrangeding in parallel are included, the metal drum is located on earth plate；Also include parallel
The metal dish between the metal drum and earth plate is arranged on, the feeding coaxial lines connect described respectively through the metal dish
Metal drum and earth plate；It is respectively arranged between the metal drum and metal dish, between the metal dish and the earth plate absolutely
Edge support is supported.
In the above-mentioned miniature antenna loaded based on capacitive, an aperture, the feed are provided with the middle of the metal dish
Coaxial line passes through the aperture, and one end connects the earth plate, other end connection metal drum distributing point.
In the above-mentioned miniature antenna loaded based on capacitive, the metal drum distributing point is located at the metal bottom of the barrel
Edge.
In the above-mentioned miniature antenna loaded based on capacitive, the metal drum, metal dish select copper foil material, institute
Copper foil material thickness is stated for 5 mm.
In the above-mentioned miniature antenna loaded based on capacitive, the metal drum is cylinder, and upper and lower bottom surface radius is
40mm, a height of 250 mm；The metal dish is circle, and radius is 150 mm.
In the above-mentioned miniature antenna loaded based on capacitive, the spacing between the metal drum and the metal dish is
90 mm, the spacing between the metal dish and the earth plate is 60 mm.
In the above-mentioned miniature antenna loaded based on capacitive, a height of 400mm of antenna.
In the above-mentioned miniature antenna loaded based on capacitive, a 62.9nH in parallel between the antenna and feed
Inductance.
In the above-mentioned miniature antenna loaded based on capacitive, the antenna is omni-directional antenna, is had in the horizontal direction
Greatest irradiation；The antenna frequencies scope 104-119MHz.
In the above-mentioned miniature antenna loaded based on capacitive, the antenna resonant frequency is 107MHz, minimum standing wave
It is 1.02 than VSWR, with a width of 15MHz, half-power beam width is 42.9 °, and antenna gain is 3.7dB.
The beneficial effects of the invention are as follows：The miniaturization of antenna is effectively realized in the case where not reducing bandwidth of operation, simultaneously
Design is easy.
So that the resonant frequency of antenna reaches 107 MHz, antenna obtains good in 104-119MHz frequency ranges
Match somebody with somebody, minimum standing-wave ratio VSWR is 1.02.With a width of 15 MHz, half-power beam width is 42.9 °, antenna gain 3.7dB.My god
Line is omni-directional antenna, there is greatest irradiation in the horizontal direction, and 70%-86% high efficiency can be kept in working band.Antenna is complete
High 40cm, about traditional antenna size half, realize the purpose of antenna miniaturization.
Brief description of the drawings
Fig. 1 is the positive structure schematic of one embodiment of the invention；
Fig. 2 is the field pattern of one embodiment of the invention；
Wherein, 1- metal drums, 2- metal dish, 3- earth plates, 4- feeding coaxial lines, 5- insulating supports, 6- apertures, 7- spaces electricity
Field, 8- dielectric displacement, 9- Induced magnetic fields.
Embodiment
Embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.
The example of the embodiment is shown in the drawings, wherein same or similar label represents identical or class from beginning to end
As element or the element with same or like function.The embodiments described below with reference to the accompanying drawings are exemplary, only
For explaining the present invention, and it is not construed as limiting the claims.
Following disclosure provides many different embodiments or example is used for realizing the different structure of the present invention.For letter
Change disclosure of the invention, hereinafter the part and setting of specific examples are described.They are only merely illustrative, and purpose is not
It is to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or letter.This repetition be for
Simplify and clear purpose, the relation between discussed various embodiments and/or setting itself is not indicated.In addition, this hair
The bright example for providing various specific techniques and material, but those of ordinary skill in the art can be appreciated that other techniques
The use of applicability and/or other materials.In addition, fisrt feature described below second feature it " on " structure can be with
The embodiment for being formed as directly contacting including the first and second features, can also include other feature formation first and second
Embodiment between feature, such first and second feature may not be direct contact.
, it is necessary to explanation in description of the invention, unless otherwise prescribed and limit, term " connected " " connection " should do extensively
Reason and good sense solution, can be joined directly together for example, it may be mechanically connecting or electrical connection or the connection of two element internals,
It can also be indirectly connected to, for those of ordinary skill in the related art, can managed as the case may be by intermediary
Solve the concrete meaning of above-mentioned term.
The present embodiment adopts the following technical scheme that realization：A kind of miniature antenna loaded based on capacitive, including feed are same
Axis, and the metal drum and earth plate be arrangeding in parallel, the metal drum are located on earth plate；Also include being set in parallel in institute
State the metal dish between metal drum and earth plate, the feeding coaxial lines through the metal dish connect respectively the metal drum and
Earth plate；Insulating support branch is respectively arranged between the metal drum and metal dish, between the metal dish and the earth plate
Support.
Further, an aperture is provided with the middle of the metal dish, the feeding coaxial lines pass through the aperture, one end connection institute
State earth plate, other end connection metal drum distributing point.
Further, the metal drum distributing point is located at metal drum bottom edge.
Further, the metal drum, metal dish select copper foil material, and the copper foil material thickness is 5 mm.
Further, the metal drum is cylinder, and upper and lower bottom surface radius is 40mm, a height of 250 mm；The metal dish is
Circle, radius is 150 mm.
Further, the spacing between the metal drum and the metal dish is 90 mm, the metal dish and the earth plate
Between spacing be 60 mm.
Further, a height of 400mm of the antenna.
Further, between the antenna and feed a 62.9nH in parallel inductance.
Further, the antenna is omni-directional antenna, there is greatest irradiation in the horizontal direction；The antenna frequencies scope 104-
119MHz。
Further, the antenna resonant frequency is 107MHz, and minimum standing wave is 1.02 than VSWR, with a width of 15MHz, half
Powerbeam width is 42.9 °, and antenna gain is 3.7dB.
During specific implementation, as shown in figure 1, a kind of miniature antenna loaded based on capacitive, including metal drum 1, metal dish
2, earth plate 3 and feeding coaxial lines 4；Aperture 6 is opened at the center of metal dish 1 to be used to feed to metal drum 1；Distributing point is located at metal drum 1
Bottom edge；The one end of feeding coaxial lines 4 connects the distributing point of metal drum 1, other end connection earth plate 3；The He of metal drum 1
Between metal dish 2, supported between metal dish 2 and earth plate 3 with insulating support 5.By increasing a suitable chi in antenna bottom
Very little metal dish 2, metal dish 2 plays a part of capacitive loading, so as to reach the purpose of antenna miniaturization.
Moreover, metal drum 1 is cylinder, and using Copper Foil as material, radius 40mm, the mm of length 250, copper thickness 5
mm。
Moreover, metal dish 2 is circle, and using Copper Foil as material, the mm of radius 150, the mm of copper thickness 5.
Moreover, metal drum 1 and the mm of 2 spacing of metal dish 90, the metal dish 2 and mm of 3 spacing of earth plate 60.
Moreover, antenna overall height 40cm.
Moreover, between antenna and feed a 62.9nH in parallel inductance.
Moreover, the spacing of the spacing by adjusting metal drum 1 and metal dish 2, metal dish 2 and earth plate 3, the He of metal drum 1
The size of metal dish 2 can change antenna performance.
The metal drum 1 and metal during maximum beam angle at the capacitive load operating frequency of antenna are determined by simulated test
The size of the spacing of the spacing of disk 2, metal dish 2 and earth plate 3, metal drum 1 and metal dish 2.
The dimension scale that the present embodiment is used, enables to the resonant frequency of antenna to reach 107MHz, antenna is in 104-
Matched well in 119MHz frequency ranges, minimum standing-wave ratio VSWR is 1.02.Bandwidth 15MHz, Half Power Beamwidth
Spend for 42.9 °, antenna gain 3.7dB.Antenna is omni-directional antenna, there is greatest irradiation in the horizontal direction.The energy in working band
Keep 70%-86% high efficiency.Antenna overall height 40cm, the about half of traditional antenna size, realize setting for antenna miniaturization
Meter.
As shown in Fig. 2 the power transmitted from power supply is divided into roughly equal two halves, half is fed to metal drum 1,
And it is generated by it space electric field 7；Second half supply metal dish 2 of power.Due to there is voltage between metal dish 2 and earth plate 3,
Dielectric displacement 8 is generated, the dielectric displacement 8 of time-varying produces the Induced magnetic field 9 being vortexed.Due to time differential, near antenna
The phase of voltage of the phase than being applied on metal dish 2 of the Induced magnetic field 9 of vortex shifts to an earlier date 90 degree.Around the vortex of metal dish 2
Shape Induced magnetic field 9 and the space electric field 7 that metal drum 1 is produced are mutually orthogonal.When space electric field 7 and Induced magnetic field 9 are smart in time
When really synchronous, the radiant power of antenna reaches maximum.
It should be appreciated that the part that this specification is not elaborated belongs to prior art.
Although describing the embodiment of the present invention above in association with accompanying drawing, those of ordinary skill in the art should
Understand, these are merely illustrative of, and various deformation or modification can be made to these embodiments, without departing from the original of the present invention
Reason and essence.The scope of the present invention is only limited by the claims that follow.
Claims (10)
1. a kind of miniature antenna loaded based on capacitive, including feeding coaxial lines, and the metal drum be arrangeding in parallel and ground connection
Plate, the metal drum is located on earth plate；Characterized in that, also including being set in parallel between the metal drum and earth plate
Metal dish, the feeding coaxial lines connect the metal drum and earth plate respectively through the metal dish；The metal drum and
Insulating support support is respectively arranged between metal dish, between the metal dish and the earth plate.
2. the miniature antenna as claimed in claim 1 loaded based on capacitive, it is characterised in that be provided with the middle of the metal dish
One aperture, the feeding coaxial lines pass through the aperture, and one end connects the earth plate, other end connection metal drum distributing point.
3. the miniature antenna as claimed in claim 2 loaded based on capacitive, it is characterised in that the metal drum distributing point position
In metal drum bottom edge.
4. the miniature antenna as claimed in claim 1 loaded based on capacitive, it is characterised in that the metal drum, metal dish
Copper foil material is selected, the copper foil material thickness is 5mm.
5. the miniature antenna as claimed in claim 4 loaded based on capacitive, it is characterised in that the metal drum is cylinder
Shape, upper and lower bottom surface radius is 40mm, a height of 250mm；The metal dish is circle, and radius is 150mm.
6. the miniature antenna as claimed in claim 1 loaded based on capacitive, it is characterised in that the metal drum and the gold
It is 90mm to belong to the spacing between disk, and the spacing between the metal dish and the earth plate is 60mm.
7. the miniature antenna as claimed in claim 1 loaded based on capacitive, it is characterised in that a height of 400mm of antenna.
8. the miniature antenna as claimed in claim 1 loaded based on capacitive, it is characterised in that between the antenna and feed
One 62.9nH of parallel connection inductance.
9. the miniature antenna as claimed in claim 1 loaded based on capacitive, it is characterised in that the antenna is omni-directional day
Line, there is greatest irradiation in the horizontal direction；The antenna frequencies scope 104-119MHz.
10. the miniature antenna as claimed in claim 9 loaded based on capacitive, it is characterised in that the antenna resonant frequency
For 107MHz, minimum standing wave is 1.02 than VSWR, with a width of 15MHz, and half-power beam width is 42.9 °, and antenna gain is
3.7dB。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710139252.6A CN106953164A (en) | 2017-03-09 | 2017-03-09 | A kind of miniature antenna loaded based on capacitive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710139252.6A CN106953164A (en) | 2017-03-09 | 2017-03-09 | A kind of miniature antenna loaded based on capacitive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106953164A true CN106953164A (en) | 2017-07-14 |
Family
ID=59467478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710139252.6A Withdrawn CN106953164A (en) | 2017-03-09 | 2017-03-09 | A kind of miniature antenna loaded based on capacitive |
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| Country | Link |
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| CN (1) | CN106953164A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075217A (en) * | 2018-01-19 | 2018-05-25 | 武汉波诺电子科技有限公司 | A kind of new omnidirectional antenna |
| CN112216962A (en) * | 2020-08-28 | 2021-01-12 | 西安电子科技大学 | Frequency-adjustable grounding loop antenna working mode |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204189954U (en) * | 2014-11-25 | 2015-03-04 | 重庆大学 | A kind of circular polarization frequency agility electronically small antenna loading parasitic ring based on capacitive |
| CN106252849A (en) * | 2016-08-31 | 2016-12-21 | 武汉睿眼神盾科技有限公司 | A kind of active charger of broadening miniature antenna bandwidth |
-
2017
- 2017-03-09 CN CN201710139252.6A patent/CN106953164A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204189954U (en) * | 2014-11-25 | 2015-03-04 | 重庆大学 | A kind of circular polarization frequency agility electronically small antenna loading parasitic ring based on capacitive |
| CN106252849A (en) * | 2016-08-31 | 2016-12-21 | 武汉睿眼神盾科技有限公司 | A kind of active charger of broadening miniature antenna bandwidth |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075217A (en) * | 2018-01-19 | 2018-05-25 | 武汉波诺电子科技有限公司 | A kind of new omnidirectional antenna |
| CN108075217B (en) * | 2018-01-19 | 2024-04-09 | 武汉波诺电子科技有限公司 | Novel omnidirectional antenna |
| CN112216962A (en) * | 2020-08-28 | 2021-01-12 | 西安电子科技大学 | Frequency-adjustable grounding loop antenna working mode |
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| PB01 | Publication | ||
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Application publication date: 20170714 |