CN209401834U - Cross-Cantor composite fractal gap ultra-wide band antenna - Google Patents

Abstract

The utility model relates to a kind of cross-Cantor composite fractal gap ultra-wide band antennas, including three-layer thin-film matrix, first layer film matrix front is covered with induced radiation patch, second layer film matrix front is covered with feed radiation patch, third layer film matrix front is also covered with induced radiation patch, the third layer film matrix back side is covered with barium titanate thin slice, the barium titanate thin slice back side is covered with permalloy coating, induced radiation patch and feed radiation patch are cross-Cantor composite fractal gap structure, the cross-Cantor composite fractal gap structure is cross point shape gap structure on the whole, it is Cantor fractal gap structure inside cross point shape gap structure.The ultra-wide band antenna size is smaller, and thinner thickness, radiance is good, and stable and reliable in work, performance redundancy is big, there is stronger anti-interference ability, has ultrabroad band ability to work.

Description

Cross-Cantor composite fractal gap ultra-wide band antenna

Technical field

The utility model relates to a kind of cross-Cantor composite fractal gap ultra-wide band antennas.

Background technique

Wireless communication technique has obtained development at full speed in 21 century, and various wireless communication system is obtained in every field It is widely applied.Mobile communication system, radio-frequency recognition system, ultra-wideband communication system, mobile digital TV system are to answer at present With the most extensive and four kinds of closely bound up wireless communication systems of people's work and life, they all work in microwave frequency band, work Make that principle, communication protocol are similar with the requirement to terminal device, there are very big integration potentiality.

More net unifications, multisystem integration are the important trends of 21 century wireless communication technique development.If can be by movement Communication system, radio-frequency recognition system, ultra-wideband communication system, mobile digital TV system combination together, are designed while work Make in the terminal device of these four systems, so that it may realize more nets unification of microwave frequency band wireless communication.More net integral terminals are set Standby to need to realize that multiband is compatible, China's Generation Mobile Telecommunication System frequency range used at present is GSM standard 0.905~0.915 GHz, 0.950~0.960 GHz, 1.710~1.785 GHz, 1.805~1.880 ghz bands；3G (Third Generation) Moblie frequency range For 1.880~1.920 GHz of TD-SCDMA standard, 2.010~2.025 GHz, 2.300~2.400 ghz bands and WCDMA system 1.920~1.980 GHz of formula, 2.110~2.170 ghz bands；Forth generation mobile communication frequency range is TD-LTE standard 2.570 ~2.620 ghz bands.The 5th third-generation mobile communication that will be come into operation there are three candidate frequency range, be respectively as follows: 3.300~ 3.400 GHz, 4.400~4.500 GHz, 4.800~4.990 GHz.There are three main working frequency range for radio-frequency recognition system: 0.902~0.928 GHz, 2.400~2.4835 GHz, 5.725~5.875 GHz.The working frequency range of radio ultra wide band system is 3.100~10.600 GHz.Mobile digital TV system working frequency range is 11.700~12.200 GHz.

(patent No.: being closest with present patent application technology 201520420110.3) to the back-shaped dipole antenna of broadband The prior art, the antenna of this patent can only cover the section communication frequency range of the third generation, forth generation mobile communication.

Utility model content

In view of this, radiance is good the purpose of the utility model is to provide a kind of stable and reliable in work, there is ultra-wideband Cross with ability to work-Cantor composite fractal gap ultra-wide band antenna.

The utility model is realized using following scheme: a kind of cross-Cantor composite fractal gap ultra-wide band antenna, packet Three-layer thin-film matrix is included, first layer film matrix front is covered with induced radiation patch, and second layer film matrix front is covered with Radiation patch is fed, third layer film matrix front is also covered with induced radiation patch, and the third layer film matrix back side is covered with Barium titanate thin slice, the barium titanate thin slice back side are covered with permalloy coating, and induced radiation patch and feed radiation patch are ten Word-Cantor composite fractal gap structure, the cross-Cantor composite fractal gap structure are cross point shape gap on the whole Structure is Cantor fractal gap structure inside cross point shape gap structure.

Further, the induced radiation patch and feed radiation patch are having a size of ± 0.1 mm of mm × 10 of 10 mm The rectangular area of ± 0.1 mm carries out cross-Cantor composite fractal gap structure iteration and obtains.

Further, the induced radiation patch and feed radiation patch use cross-Cantor of at least 2 ranks compound Divide shape gap structure.

Further, antenna feed point is equipped at the bottom edge center of the feed radiation patch.

Further, the three-layer thin-film matrix is polyethylene terephthalate thin film matrix, and shape is in rectangle, Size is ± 0.1 mm of ± 0.1 mm of mm × 10 of 10 mm, with a thickness of ± 0.02 mm of 0.2 mm, relative dielectric constant is 8 ± 0.5。

Further, the barium titanate thin slice is in rectangle, and size is ± 0.1 mm of ± 0.1 mm of mm × 10 of 10 mm, thickness For ± 0.1 mm of 0.3 mm, relative dielectric constant is 100 ± 5.

Further, the size of the permalloy coating is identical as the size of barium titanate thin slice, in permalloy coating Permalloy be 1% niobium, tantalum, titanium, aluminium composition by 78% nickel, 21% iron.

Further, the induced radiation patch and feed radiation patch are printed by graphene conductive ink.

Compared with prior art, the utility model has the following beneficial effects: the utility model cross-compound point of Cantor Shape gap ultra-wide band antenna size is smaller, and thinner thickness, radiance is good, and stable and reliable in work, performance redundancy is big, has relatively strong Anti-interference ability, have ultrabroad band ability to work, the second generation can be completely covered to the 5th third-generation mobile communication frequency range, radio frequency Identify frequency range, ultra-wideband communications frequency range and mobile digital TV frequency range.

For the purpose of this utility model, technical solution and advantage is more clearly understood, specific embodiment will be passed through below And relevant drawings, the utility model is described in further detail.

Detailed description of the invention

Fig. 1 is that the utility model implements ultra-wide band antenna cross section structure figure；

Fig. 2 is 2 rank radiation patch structural schematic diagram of the utility model embodiment；

Fig. 3 is the utility model embodiment cross-Cantor composite fractal gap structure iterative process schematic diagram；

Fig. 4 is the return loss (S in the utility model ultrabroad band day₁₁) performance map.

Specific embodiment

As shown in Fig. 1 ~ 4, a kind of cross-Cantor composite fractal gap ultra-wide band antenna, including three-layer thin-film matrix, First layer film matrix front is covered with induced radiation patch, and second layer film matrix front is covered with feed radiation patch, the Three-layer thin-film matrix front is also covered with induced radiation patch, and the third layer film matrix back side is covered with barium titanate thin slice, metatitanic acid The barium thin slice back side is covered with permalloy coating, and induced radiation patch and feed radiation patch are compound point of cross-Cantor Shape gap structure, the cross-Cantor composite fractal gap structure is cross point shape gap structure on the whole, and cross point shape is stitched It is Cantor fractal gap structure inside gap structure.This antenna is using cross-Cantor composite fractal gap structure by two kinds Divide cross-radiation patch of the Cantor composite fractal gap structure as antenna made of the fusion of shape gap structure, utilization is compound The good self-similarity of point shape gap structure guarantees that antenna can steadily work in very wide frequency range；Feed radiation patch Two pieces of induced radiation patches above and below piece form the mirror compensated structure in three-dimensional space, and it is whole to further enhance antenna The radianting capacity of body.

Cross-Cantor composite fractal gap structure is merged by two kinds of points of shape gap structures, is a kind of completely new point Shape iterative manner can roll into one the advantages of two kinds of fractal structures, have fabulous self-similarity.Make in Antenna Design With cross-Cantor composite fractal gap structure, can in the case where not changing aerial radiation patch global shape and size, Make aerial radiation patch that there is uniform current distribution using the good self-similarity of composite fractal gap structure, guarantees antenna energy Enough steadily to work in very wide frequency range, size is smaller, thinner thickness, and radiance is good, stable and reliable in work, performance Redundancy is big, there is stronger anti-interference ability, has ultrabroad band ability to work, the second generation can be completely covered to the 5th Dai Yidong Communications band, radio frequency identification frequency range, ultra-wideband communications frequency range and mobile digital TV frequency range are that a microwave frequency band nets unification more Terminal device antenna.

Mirror compensated structure is a kind of using induced radiation principle, improves the improvement structure of antenna radiation performance.Mirror image is mended Compensation structure is that the induced radiation type antenna radiation performance of a kind of " omnipotent " improves structure.Mirror compensated structure size structure and antenna Feed irradiation structure it is completely the same.If antenna, nearby there are metallic conductor, metallic conductor is because of the electromagnetic field that is generated by antenna Effect to evoke electric current, this induced current also can be called secondary field in space excitation electromagnetic field.Space any point To be all the field that directly excites of antenna be superimposed with secondary field for field.As long as rationally adjusting antenna feed electric radiation structure and mirror compensated The distance of structure, so that it may which making the electric current of the two has same or similar phase.At this moment, the field of space any point is all antenna feed The in-phase stacking of the secondary field of field and the excitation of mirror compensated structure that irradiation structure directly excites, the radiance of antenna will obtain Biggish raising.Two pieces of induced radiation patches are added above and below feed radiation patch, can be regarded as in three-dimensional space In used mirror compensated structure, they can further enhance the radianting capacity of antenna entirety.

In the present embodiment, the induced radiation patch and feed radiation patch having a size of ± 0.1 mm of 10 mm × The rectangular area of ± 0.1 mm of 10 mm carries out cross-Cantor composite fractal gap structure iteration and obtains.

In the present embodiment, the induced radiation patch and feed radiation patch use cross-Cantor of at least 2 ranks Composite fractal gap structure, cross-Cantor composite fractal gap structure iterative process is as shown in figure 3, cross-Cantor is multiple The initial configuration (0 rank) for closing point shape gap structure is square, 20 row, 20 column, 400 small squares is divided into, by the 5th row 9th column, the 10th column, the 12nd column, the 6th row the 10th column, the 11st column, the 12nd column, the 7th row the 9th column, the 10th column, the 11st column, eighth row 9th arranges, the 11st arranges, the 12nd arranges, the 9th row the 5th arranges, the 6th arranges, the 8th arranges, the 9th arranges, the 10th arranges, the 12nd arranges, the 13rd arranges, the 14th arranges, 16th column, the 10th row the 6th column, the 7th column, the 8th column, the 10th column, the 11st column, the 12nd column, the 14th column, the 15th column, the 16th column, the 11st The column of row the 5th, the 6th column, the 7th column, the 9th column, the 10th column, the 11st column, the 13rd column, the 14th column, the 15th column, the 12nd row the 5th column, the 7th Column, the 8th column, the 9th column, the 11st column, the 12nd column, the 13rd column, the 15th column, the 16th column, the 13rd row the 9th column, the 10th column, the 12nd column, 14th row the 10th column, the 11st column, the 12nd column, the 15th row the 9th column, the 10th column, the 11st column, the 16th row the 9th column, the 11st column, the 12nd Column, totally 60 small squares are cut out, and form a cross-Cantor composite fractal gap, are left the square region of 340 equal parts Domain, big square area and 20 independent small square areas including 20 4 rows 4 column, then obtain 1 rank cross-Cantor Composite fractal gap structure；By 1 rank cross-Cantor composite fractal gap structure, 20 big square area and 20 independences Small square area, do cross-Cantor composite fractal gap iteration again respectively, then obtain 2 rank crosses-compound point of Cantor Shape gap structure；Continue iteration according to the method, then cross-Cantor composite fractal gap structure of high-order can be obtained.

Cross-Cantor composite fractal gap structure is a kind of completely new fractal iteration mode, by pasting in aerial radiation It digs a hole to form the composite fractal gap structure of " embedded " inside piece, the gap of the structure is cross point shape gap knot on the whole Structure, it is microcosmic on be Cantor fractal gap structure, the advantages of two kinds of fractal structures, can be rolled into one, have it is fabulous from phase Like property.Cross-Cantor composite fractal gap structure is used in Antenna Design, can not change aerial radiation patch entirety In the case where shape and size, using the good self-similarity of composite fractal gap structure there is aerial radiation patch uniform Current distribution guarantees that antenna can steadily work in very wide frequency range.

In the present embodiment, antenna feed point is equipped at the bottom edge center of the feed radiation patch.

In the present embodiment, the three-layer thin-film matrix structure is unanimously polyethylene terephthalate (PET) film Matrix, shape are in rectangle, and size is ± 0.1 mm of ± 0.1 mm of mm × 10 of 10 mm, with a thickness of ± 0.02 mm of 0.2 mm, phase It is 8 ± 0.5 to dielectric constant.The chemical stability of polyethylene terephthalate (PET) film is very good, can be with oil resistant, resistance to Diluted acid, resistance to diluted alkaline, resistance to most of solvents can work normally within the temperature range of -70 DEG C to 150 DEG C, using poly- to benzene Dioctyl phthalate second diester (PET) film is as antenna host material, it is ensured that antenna has good thermal adaptability, anticorrosive Property and stable Wuli-Shili-Renli system approach, it is ensured that antenna has stable physics and chemical property.

In the present embodiment, the barium titanate thin slice is microwave frequency band low-loss barium titanate thin slice, and barium titanate thin slice is in square Shape, size is ± 0.1 mm of ± 0.1 mm of mm × 10 of 10 mm, with a thickness of ± 0.1 mm of 0.3 mm, relative dielectric constant 100 ± 5, barium titanate is a kind of strong dielectric compound with high dielectric constant and low-dielectric loss, is capable of forming effective electric field screen Layer is covered, interference of the external electrical field to aerial radiation is prevented,

In the present embodiment, the size of the permalloy coating is identical as the size of barium titanate thin slice, permalloy plating Permalloy in layer is by 78% nickel, 21% iron, and 1% niobium, tantalum, titanium, aluminium composition have both high rigidity and high magnetic permeability, can Effectively to shield influence of the external magnetic field to aerial radiation, and mechanical protection is provided for antenna structure.By barium titanate thin slice and slope Alloy layer is not combined, and can effectively prevent interference of the antenna ambient electromagnetic field to aerial radiation, guarantees antenna It has strong anti-interference ability.

In the present embodiment, the induced radiation patch and feed radiation patch are printed by graphene conductive ink, Graphene has very high electron mobility, and it is big to be fabricated to the radio-frequency current intensity that can pass through after conductive ink, is led with graphene The radio-frequency current intensity of inner antenna can be enhanced in electric ink printed antenna radiation patch, improves aerial radiation intensity, graphene Conductive ink is free of metal, and corrosion can be effectively prevented in printed antenna radiation patch.

Cross is divided to cross-health made of the two kinds of points of shape gap structure fusions of shape gap structure and Cantor fractal gap structure Radiation patch of the Bristol composite fractal gap structure as antenna is guaranteed using the good self-similarity of composite fractal gap structure Antenna can steadily work in very wide frequency range；Feed two pieces of induced radiation patches above and below radiation patch The mirror compensated structure in three-dimensional space is formed, the radianting capacity of antenna entirety is further enhanced.Use poly terephthalic acid Second diester (PET) film is as antenna host material, it is ensured that antenna has good thermal adaptability, corrosion resistance and steady Fixed Wuli-Shili-Renli system approach.Barium titanate thin slice and permalloy coating are used in the antenna structure, can effectively prevent antenna all Enclose interference of the ambient electromagnetic field to aerial radiation.Using the radiation patch of graphene conductive ink printed antenna, can effectively prevent Only corrode and improves aerial radiation intensity.

Fig. 4 is cross-Cantor composite fractal gap ultra-wide band antenna return loss (S₁₁) performance map.Measured result It has been shown that, the working band range of this antenna are 0.382~16.108 GHz, and bandwidth of operation is 15.726 GHz, bandwidth frequency multiplication Journey is 42.17, is below -10 dB in entire working band internal antenna return loss, return loss minimum value is -47.67 dB. This antenna has strong anti-interference ability, and can work normally near microwave frequency band signal source, radiance not by It influences.This antenna size is smaller, thinner thickness, and radiance is good, and stable and reliable in work, performance redundancy is big, has stronger anti- Interference performance has ultrabroad band ability to work, the second generation can be completely covered to the 5th third-generation mobile communication frequency range, radio frequency identification Frequency range, ultra-wideband communications frequency range and mobile digital TV frequency range can be widely applied in the more net integral terminal equipment of microwave frequency band.

This antenna completely cover 0.902~0.928 GHz, 0.905~0.915 GHz, 0.950~0.960 GHz, 1.710~1.785 GHz, 1.805~1.880 GHz, 1.880~1.920 GHz, 1.920~1.980 GHz, 2.010~ 2.025 GHz, 2.110~2.170 GHz, 2.300~2.400 GHz, 2.400~2.4835 GHz, 2.570~2.620 GHz, 3.300~3.400 GHz, 4.400~4.500 GHz, 4.800~4.990 GHz, 5.725~5.875 GHz, 3.100 The second generations such as~10.600 GHz, 11.700~12.200 GHz to all standard all working frequency ranges of the 5th third-generation mobile communication, Radio frequency identification frequency range, ultra-wideband communications frequency range and mobile digital TV frequency range.

With for mobile communication system, radio-frequency recognition system, ultra-wideband communication system, mobile digital TV system routine Antenna compares, this antenna has the advantages that prominent and significant effect: this antenna has good anti-destructive, antenna spoke It penetrates and is free of metal in patch, will not be corroded in long-term use process, the composite fractal gap structure of height self-similarity, even if Only remaining a quarter after being destroyed, it is also ensured that antenna works normally；This antenna has biggish performance redundancy and stabilization Radiation work ability, return loss minimum value is down to -47.67 dB, and radianting capacity not will receive the dry of radio-frequency signal source It disturbs, it is ensured that wireless communication signals have good transmission quality；The bandwidth octave of this antenna is more than 40, and bandwidth of operation connects Nearly 16 GHz has excellent ultrabroad band ability to work, especially to the coverage effect of low-frequency range considerably beyond existing Microwave frequency band ultra-wideband antenna.

Above-mentioned any technical solution disclosed in the utility model unless otherwise stated, if it discloses numberical range, So disclosed numberical range is preferred numberical range, and any it should be appreciated by those skilled in the art preferred numerical value Range is only the numerical value that technical effect is obvious or representative in many enforceable numerical value.Since numerical value is more, It is impossible to exhaust, so the utility model discloses component values just to illustrate the technical solution of the utility model, also, above-mentioned The numerical value enumerated should not constitute the limitation that protection scope is created to the utility model.

If the utility model is open or relates to the components or structural member of connection fastened to each other, except as otherwise sound It is bright outer, it is fixedly connected it is to be understood that connection (such as using bolt or screw connection) can be removedly fixed, can also manage Solution are as follows: it is non-removable to be fixedly connected with (such as riveting, welding), certainly, connection fastened to each other or integral structure ( Such as manufactured using casting technique is integrally formed) replaced (obviously can not be using except integrally formed technique).

In addition, for indicating positional relationship or shape applied in above-mentioned any technical solution disclosed by the utility model Term its meaning includes approximate with its, similar or close state or shape unless otherwise stated.

Either component provided by the utility model by multiple individual component parts either assembled, or The separate part that integrally formed technique manufactures.

Finally it should be noted that: above embodiments are only to illustrate the technical solution of the utility model rather than limit it System；Although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should Understand: specific implementation of the utility model can still be modified or is equally replaced to some technical characteristics It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model In range.

Claims (8)

1. a kind of cross-Cantor composite fractal gap ultra-wide band antenna, it is characterised in that: including three-layer thin-film matrix, Thin film matrix front is covered with induced radiation patch, and second layer film matrix front is covered with feed radiation patch, third Layer film matrix front is also covered with induced radiation patch, and the third layer film matrix back side is covered with barium titanate thin slice, barium titanate The thin slice back side is covered with permalloy coating, and induced radiation patch and feed radiation patch are cross-Cantor composite fractal Gap structure, the cross-Cantor composite fractal gap structure is cross point shape gap structure on the whole, and cross divides shape gap Inside configuration is Cantor fractal gap structure.

2. cross according to claim 1-Cantor composite fractal gap ultra-wide band antenna, it is characterised in that: described Induced radiation patch and feed radiation patch the rectangular area having a size of ± 0.1 mm of ± 0.1 mm of mm × 10 of 10 mm into Row cross-Cantor composite fractal gap structure iteration and obtain.

3. cross according to claim 2-Cantor composite fractal gap ultra-wide band antenna, it is characterised in that: described Induced radiation patch and feed radiation patch use cross-Cantor composite fractal gap structure of at least 2 ranks.

4. cross according to claim 1-Cantor composite fractal gap ultra-wide band antenna, it is characterised in that: described It feeds and is equipped with antenna feed point at the bottom edge center of radiation patch.

5. cross according to claim 1,2,3 or 4-Cantor composite fractal gap ultra-wide band antenna, feature exist Be polyethylene terephthalate thin film matrix in: the three-layer thin-film matrix, shape is in rectangle, size be 10 mm ± ± 0.1 mm of the mm of 0.1 mm × 10, with a thickness of ± 0.02 mm of 0.2 mm, relative dielectric constant is 8 ± 0.5.

6. cross according to claim 1,2,3 or 4-Cantor composite fractal gap ultra-wide band antenna, feature exist In: the barium titanate thin slice is in rectangle, and size is ± 0.1 mm of ± 0.1 mm of mm × 10 of 10 mm, with a thickness of 0.3 mm ± 0.1 Mm, relative dielectric constant are 100 ± 5.

7. cross according to claim 1,2,3 or 4-Cantor composite fractal gap ultra-wide band antenna, feature exist In: the size of the permalloy coating is identical as the size of barium titanate thin slice.

8. cross according to claim 1-Cantor composite fractal gap ultra-wide band antenna, it is characterised in that: described Induced radiation patch and feed radiation patch are printed by graphene conductive ink.