CN106876899A - Straight-flanked ring Cantor composite fractal antenna - Google Patents
Straight-flanked ring Cantor composite fractal antenna Download PDFInfo
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- CN106876899A CN106876899A CN201710138336.8A CN201710138336A CN106876899A CN 106876899 A CN106876899 A CN 106876899A CN 201710138336 A CN201710138336 A CN 201710138336A CN 106876899 A CN106876899 A CN 106876899A
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- Prior art keywords
- straight
- flanked ring
- antenna
- cantor
- fractal
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- 239000002131 composite material Substances 0.000 title claims abstract description 39
- 230000005855 radiation Effects 0.000 claims abstract description 26
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 239000000919 ceramic Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 238000010295 mobile communication Methods 0.000 abstract description 12
- 238000012804 iterative process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
Landscapes
- Waveguide Aerials (AREA)
Abstract
The present invention relates to a kind of straight-flanked ring Cantor composite fractal antenna, it includes substrate, antenna ground plate and radiation patch；The antenna ground plate and radiation patch are fitted on the two sides of substrate respectively；The radiation patch is straight-flanked ring Cantor composite fractal structure；The straight-flanked ring Cantor composite fractal structure uses Cantor fractal structure to be substituted as the small square-shaped metal region straight-flanked ring fractal structure inside basic structure, and basic structure.A kind of return loss minimum value it is an object of the invention to provide size is small, in working band is less than 20dB, the straight-flanked ring Cantor composite fractal antenna of three candidate's frequency ranges that the 5th third-generation mobile communication can be completely covered.
Description
Technical field
The present invention relates to a kind of straight-flanked ring-Cantor composite fractal antenna.
Background technology
5th third-generation mobile communication is the GSM of current latest generation, with communications band wider, faster
Data transmission bauds and good Consumer's Experience.It is high that 5th third-generation mobile communication can meet mobile data flow in coming 10 years
The demand that speed increases, has unique advantage in terms of the availability of frequency spectrum and efficiency, with huge development potentiality, will be 2020
Commercial operation is put into before and after year.2015, three candidate's frequency ranges that International Telecommunication Union determines the 5th third-generation mobile communication were：
3.300~3.400GHz, 4.400~4.500GHz and 4.800~4.990GHz.
Antenna is the important component of GSM, and the performance of antenna directly decides the whole of GSM
Body performance.5th Generation Mobile Communication System is to the performance requirement of antenna：Size is sufficiently small, can put mobile terminal into；Spoke
Penetrate performance good, working band internal antenna return loss minimum value is less than -20dB；Bandwidth of operation is big, and antenna operating band needs to cover
Three candidate's frequency ranges of the third-generation mobile communication of lid the 5th.
The content of the invention
A kind of return loss minimum value it is an object of the invention to provide size is small, in working band is less than -20dB, energy
Straight-flanked ring-Cantor the composite fractal antenna of three candidate's frequency ranges of the 5th third-generation mobile communication is enough completely covered.
The purpose of the present invention is achieved through the following technical solutions：A kind of straight-flanked ring-Cantor composite fractal antenna, it includes
Substrate, antenna ground plate and radiation patch；The antenna ground plate and radiation patch are fitted on the two sides of substrate respectively；Institute
Radiation patch is stated for straight-flanked ring-Cantor composite fractal structure；The straight-flanked ring-Cantor composite fractal structure uses Cantor
Fractal structure is substituted as the small square-shaped metal region inside basic structure, and basic structure with straight-flanked ring fractal structure.
Preferably, the antenna ground plate is all-metal ground structure.
Preferably, the straight-flanked ring-Cantor composite fractal structure uses the Cantor fractal structure of at least 2 ranks.
Preferably, the straight-flanked ring-Cantor composite fractal structure uses the straight-flanked ring fractal structure of at least 3 ranks.
Preferably, the straight-flanked ring-Cantor composite fractal structure underside edge center is provided with antenna feed point.
Preferably, the substrate is low-loss microwave ceramics substrate, and its relative dielectric constant is 35-40.
Preferably, the substrate is shaped as rectangle, and size is 20mm ± 1mm × 20mm ± 1mm, thickness be 1mm ±
0.1mm。
Preferably, the straight-flanked ring-Cantor composite fractal radiation patch overall size is 16mm ± 1mm × 16mm ± 1mm.
Preferably, the material of the antenna ground plate and radiation patch is copper, silver, gold or aluminium.
For than prior art, the advantage of the invention is that：Existing fractal structure only has external edge along curve with certainly
Similar structure, inner antenna major part place is still the metal radiation piece of monoblock, and radio-frequency current can be more equally distributed
Place is confined near edge curve.And straight-flanked ring-Cantor composite fractal the structure of present invention design is by two kinds of fractal structures
It is combined, is the unification of macroscopical fractal structure and microcosmic fractal structure, from macroscopically, the shape of antenna keeps Cantor fractal
Structure is constant, and each small square-shaped metal region of microcosmic upper inner antenna is a miniature straight-flanked ring fractal structure, antenna
Edge curve and interior metal radiation area will will all be greatly improved with self-similar structure, the broadband operation performance of antenna,
Radiation intensity is remarkably reinforced, and is fully able to meet performance requirement of the 5th Generation Mobile Communication System to antenna.
Brief description of the drawings
Fig. 1 is 0 rank Cantor fractal structure.
Fig. 2 is 1 rank Cantor fractal structure.
Fig. 3 is 2 rank Cantor fractal structures.
Fig. 4 is 1 rank straight-flanked ring fractal structure.
Fig. 5 is 2 rank straight-flanked ring fractal structures.
Fig. 6 is 3 rank straight-flanked ring fractal structures.
Fig. 7 is a kind of structural representation of embodiment of radiation patch of the present invention.
Fig. 8 is the return loss (S of embodiment illustrated in fig. 711) performance map, the abscissa in figure represents frequency Frequency
(GHz), ordinate represents return loss intensity (The return loss of the antenna (dB)).
Label declaration：1 substrate, 2 radiation patch, 3 antenna feed points.
Specific embodiment
Present invention is described in detail with reference to Figure of description and embodiment：
A kind of straight-flanked ring-Cantor composite fractal antenna, it includes substrate, antenna ground plate and radiation patch；It is described
Antenna ground plate and radiation patch are fitted on the two sides of substrate respectively；The radiation patch is compound point of straight-flanked ring-Cantor
Shape structure；The straight-flanked ring-Cantor composite fractal structure uses Cantor fractal structure as basic structure, in basic structure
The small square-shaped metal region in portion is substituted with straight-flanked ring fractal structure.
The antenna ground plate is all-metal ground structure.
As shown in Figure 1 to Figure 3, it is the iterative process schematic diagram of Cantor fractal structure.In Cantor fractal structure
In iterative process, its prototype structure is square patch；4 row, 4 row, 16 small squares are divided into, the 1st row the 3rd is deleted
Row, the row of the 2nd row the 1st, the row of the 3rd row the 4th, the small square of the row of the 4th row the 2nd, are left 12 small squares, constitute 1 rank Cantor
Fractal structure；Each small square of 1 rank Cantor fractal structure is done into Cantor fractal iteration respectively again, 2 rank health supports are obtained
That fractal structure.Continue iteration according to the method, then can obtain high-order Cantor fractal structure.
As shown in Figures 4 to 6, it is the iterative process schematic diagram of straight-flanked ring fractal structure.In straight-flanked ring fractal structure
In iterative process, 1 rank straight-flanked ring fractal structure is 1 layer of straight-flanked ring that a length of side is a, and line width is 0.1a；2 rank straight-flanked rings point shape
Structure is one the 2nd layer of straight-flanked ring of 45 degree of rotation in 1 rank straight-flanked ring fractal structure nested inside, and its line width is the 1st layer of square
The half of shape ring；3 rank straight-flanked ring fractal structures are the 3 of nested 45 degree of a rotation again inside 2 rank straight-flanked ring fractal structures
Layer straight-flanked ring, its line width is the 2nd layer of half of straight-flanked ring；Continue iteration according to the method nested, then can obtain Some Higher-order Rectangular
Ring fractal structure.
The Cantor fractal structure of the straight-flanked ring-Cantor composite fractal structure use at least 2 ranks and at least square of 3 ranks
Shape ring fractal structure, antenna feed point is preferably located at the straight-flanked ring-Cantor composite fractal structure underside edge center.
The substrate is low-loss microwave ceramics substrate, and its relative dielectric constant is 35-40.The shape of the substrate is preferred
It is rectangle, size is 20mm ± 1mm × 20mm ± 1mm, and thickness is 1mm ± 0.1mm.
The straight-flanked ring-Cantor composite fractal radiation patch overall size is preferably 16mm ± 1mm × 16mm ± 1mm.
The material of the antenna ground plate and radiation patch is copper, silver, gold or aluminium.
A specific embodiment of the invention is given below：
The present embodiment is provided with antenna ground plate and radiation patch 2, is fitted in respectively on the two sides of substrate 1, antenna ground
Plate is all-metal ground structure, and the structure of radiation patch 2 is as shown in Figure 7.
The present embodiment uses the 2 rank Cantor fractal structures that size is 16mm ± 1mm × 16mm ± 1mm to be tied as basic
Structure, by its internal 144 size for the small square area of 1mm × 1mm is substituted with 3 rank straight-flanked ring fractal structures, constitutes square
The radiation patch 2 of shape ring-Cantor composite fractal structure.Antenna feed point 3 is located under straight-flanked ring-Cantor composite fractal structure
Side edge center.
The substrate 1 of the present embodiment is low-loss microwave ceramics substrate, and its relative dielectric constant is 35-40.The shape of substrate 1
It is rectangle, size is 20mm ± 1mm × 20mm ± 1mm, and thickness is 1mm ± 0.1mm.
Fig. 8 gives the return loss (S of the embodiment of the present invention11) performance map.From figure 8, it is seen that measured result shows
The operating center frequency of the antenna of the present embodiment is 4.21GHz, and antenna operating band scope is 3.178~5.281GHz, work
With a width of 2.103GHz, -10dB is below in whole working band internal antenna return loss, return loss minimum value for -
45.39dB.Measured result shows that the antenna of the present embodiment completely covers three candidate's frequency ranges of the 5th third-generation mobile communication：
3.300~3.400GHz, 4.400~4.500GHz and 4.800~4.990GHz.
The present invention has the advantages that following prominent and significant effect：Antenna size is only 20mm × 20mm × 1mm, compares people
Two finger segments it is also small, in can putting small-sized mobile communication equipment into；Antenna return loss minimum value reaches-
45.39dB, the custom requirements better than working band internal antenna return loss minimum value less than -20dB；Antenna operating band is complete
Cover three candidate's frequency ranges of the 5th third-generation mobile communication, and have larger performance redundancy, it is ensured that antenna it is various can not be pre-
Being capable of normal work in the adverse circumstances known.Antenna described in the present invention has that size is small, return loss is low, bandwidth of operation is big concurrently
Advantage, had broad application prospects in the 5th Generation Mobile Communication System.
Claims (10)
1. a kind of straight-flanked ring-Cantor composite fractal antenna, it is characterised in that：It includes substrate, antenna ground plate and radiation
Paster；The antenna ground plate and radiation patch are fitted on the two sides of substrate respectively；The radiation patch is straight-flanked ring-Kang Tuo
That composite fractal structure；The straight-flanked ring-Cantor composite fractal structure uses Cantor fractal structure as basic structure, base
The small square-shaped metal region of this inside configuration is substituted with straight-flanked ring fractal structure.
2. straight-flanked ring according to claim 1-Cantor composite fractal antenna, it is characterised in that：The antenna ground plate
It is all-metal ground structure.
3. straight-flanked ring according to claim 1-Cantor composite fractal antenna, it is characterised in that：Straight-flanked ring-the Kang Tuo
The Cantor fractal structure that your composite fractal structure is used is the structure of at least 2 ranks.
4. straight-flanked ring according to claim 1-Cantor composite fractal antenna, it is characterised in that：Straight-flanked ring-the Kang Tuo
The straight-flanked ring fractal structure that your composite fractal structure is used is the structure of at least 3 ranks.
5. the straight-flanked ring according to Claims 1-4 any one-Cantor composite fractal antenna, it is characterised in that：It is described
Straight-flanked ring-Cantor composite fractal structure underside edge center is provided with antenna feed point.
6. the straight-flanked ring according to Claims 1-4 any one-Cantor composite fractal antenna, it is characterised in that：It is described
Substrate is low-loss microwave ceramics substrate.
7. straight-flanked ring according to claim 6-Cantor composite fractal antenna, it is characterised in that：The low-loss microwave
The relative dielectric constant of ceramic substrate is 35-40.
8. the straight-flanked ring according to Claims 1-4 any one-Cantor composite fractal antenna, it is characterised in that：It is described
Substrate is shaped as rectangle, and size is 20mm ± 1mm × 20mm ± 1mm, thickness is 1mm ± 0.1mm.
9. the straight-flanked ring according to Claims 1-4 any one-Cantor composite fractal antenna, it is characterised in that：It is described
Straight-flanked ring-Cantor composite fractal radiation patch overall size is 16mm ± 1mm × 16mm ± 1mm.
10. the straight-flanked ring according to Claims 1-4 any one-Cantor composite fractal antenna, it is characterised in that：Institute
The material for stating antenna ground plate and radiation patch is copper, silver, gold or aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710138336.8A CN106876899A (en) | 2017-03-09 | 2017-03-09 | Straight-flanked ring Cantor composite fractal antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710138336.8A CN106876899A (en) | 2017-03-09 | 2017-03-09 | Straight-flanked ring Cantor composite fractal antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106876899A true CN106876899A (en) | 2017-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710138336.8A Pending CN106876899A (en) | 2017-03-09 | 2017-03-09 | Straight-flanked ring Cantor composite fractal antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284708A (en) * | 2021-12-17 | 2022-04-05 | 南京理工大学 | Annular metamaterial fractal super-surface composite antenna based on Minkowski |
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2017
- 2017-03-09 CN CN201710138336.8A patent/CN106876899A/en active Pending
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| US20090207087A1 (en) * | 2008-02-19 | 2009-08-20 | Advanced Connection Technology Inc. | Fractal dipole antenna |
| CN102005643A (en) * | 2010-10-14 | 2011-04-06 | 厦门大学 | Three-frequency Koch fractal ring mirror image dipole antenna |
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Application publication date: 20170620 |
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