CN1881681B - Vertical complementary type fractal antenna - Google Patents
Vertical complementary type fractal antenna Download PDFInfo
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- CN1881681B CN1881681B CN2005100753878A CN200510075387A CN1881681B CN 1881681 B CN1881681 B CN 1881681B CN 2005100753878 A CN2005100753878 A CN 2005100753878A CN 200510075387 A CN200510075387 A CN 200510075387A CN 1881681 B CN1881681 B CN 1881681B
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Abstract
The invention relates to a vertical compensate smash antenna, which comprises the first and second smash structures, wherein the first smash structure is formed by stacking on one base pattern; and the second smash structure is relative to the first smash structure to compensate them. The invention can effectively increase the frequency width of antenna.
Description
Technical field
The present invention relates to a kind of antenna, particularly a kind of fractal antenna that has a complementary ground structure in vertical direction.
Background technology
The fast development of wireless communication technology and semiconductor fabrication techniques in recent years, it is essential to make that radio communication has become life.Radio communication all is made up of transmitter/receiver and antenna, and wherein antenna is the conversion of being responsible for electromagnetic energy in circuit and the air, is one of part important in the communication system.Because the downsizing and the wide demand of multifrequency of electronic product, make Antenna Design towards downsizing, simplify the structure and the technique direction development of multifrequency or wideband.
Still having at present quite a lot of is research, the especially microstrip antenna of doing at microstrip antenna and array antenna, is the positive technology of research and development.In general, microstrip antenna has makes easy, advantages such as external form is frivolous, low section, but low radiation efficiency and narrow frequency characteristic are main shortcomings.
Another kind is being broken shape structural antenna (fractal antenna) at developing antenna just.Broken shape structure and EM theory combination, successful is applied in broken shape theory on the problem of electromagenetic wave radiation, propagation and scattered field.Because the self-similar characteristic of fractal antenna makes antenna have the characteristic of unlimited frequency range, therefore utilize the Antenna Design of broken shape characteristic and exploitation to be attracted attention gradually.
At present be divided into two kinds in the application of broken shape structure, a kind of is directly to utilize existing broken shape structure.Another kind then is to design broken shape structure according to broken shape oneself analogue method.The fractal antenna that will have the array characteristic is applied on the microstrip antenna, can utilize the characteristic of the band multiplex of fractal antenna and high antenna gain to improve the shortcoming of general microstrip antenna.
Relevant prior art, Ban-Leong Ooi for example, " A Modified Contour IntegralAnalysis for Sierpinski Fractal Carpet Antennas With and Without ElectromagneticBand Gap Ground Plane ", IEEE TRANSACTIONS ON ANTENNAS ANDPROPAGATION, VOL.52, NO.5, the disclosed fractal antenna of in May, 2004,, its cardinal principle is to change the hole of ground connection with the control radiation efficiency.
And No. 6127977 disclosed fractal antenna of patent of the U.S. its be to utilize two-layer broken shape structure to increase frequency range and radiation efficiency.No. 6642898 disclosed fractal antenna of patent of the U.S. is to use the slotted eye design instead line style broken shape structure.No. 6476766 disclosed fractal antenna of patent of the U.S. is to utilize the slotted hole structure on upper strata and lower floor to interlock to design fractal antenna more closely.
Dwindle antenna volume is the target of making great efforts always, yet, in the design of antenna miniaturization, do not consider that the antenna volume of ground connection design is bigger, though but consider that the less ground connection of antenna antenna volume of ground connection design has taken many volumes and area.Because fractal antenna is quite attractive new-type antenna, general some characteristics of all thinking fractal antenna can improve significantly for size, frequency range and the radiation pattern of antenna, yet general practical going up for good radiation efficiency can not add ground connection usually below fractal antenna, related art does not propose any solution to the fractal antenna with ground connection.
Summary of the invention
In view of above problem, the present invention discloses a kind of vertical complementary type fractal antenna, to solve existing in prior technology problem or shortcoming.
Disclosed according to the embodiment of the present invention vertical complementary type fractal antenna includes a signals layer, form by conductor material, have one first broken shape structure, wherein the first broken shape structure is to be that benchmark piles up (stacked) back and forms with a basic pattern, and the number of times that piles up is more than or equal to 1; And a ground plane, form by conductor material, have one second a broken shape structure corresponding to the first broken shape structure.A kind of vertical complementary type fractal antenna disclosed according to the present invention includes: one first broken shape structure is that benchmark piles up back formation with a basic pattern, and the number of times that piles up is not less than 1; And one second broken shape structure, be complementary to the described first broken shape structure, its empty area is not less than the area of the described first broken shape structure, wherein electric current is zero part on antenna resonance frequency, and the empty area of the area of the described first broken shape structure and the described second broken shape structure is respectively full-sized 1/2nd of the described first broken shape structure and the described second broken shape structure.
A kind of vertical complementary type fractal antenna disclosed according to the present invention, the wherein said second broken shape structure is a benchmark with the described first broken shape structure, and the partially-etched back of a conductor material corresponding to the described first broken shape structure formed.
A kind of vertical complementary type fractal antenna disclosed according to the present invention, the empty area of the wherein said second broken shape structure are not more than two times of area of the described first broken shape structure.
A kind of vertical complementary type fractal antenna disclosed according to the present invention wherein also includes a medium, is arranged between the described first broken shape structure and the described second broken shape structure, and wherein said medium is to be an insulated substrate or air.
A kind of vertical complementary type fractal antenna disclosed according to the present invention, the wherein said first broken shape structure is formed at a surface of described insulated substrate, and the described second broken shape structure is formed among another surface or described insulated substrate of described insulated substrate.
A kind of vertical complementary type fractal antenna disclosed according to the present invention wherein also includes at least one slotted eye.
A kind of vertical complementary type fractal antenna disclosed according to the present invention comprises: a signals layer, form by conductor material, and have the described first broken shape structure; And a ground plane, form by conductor material, have described second a broken shape structure that is complementary to the described first broken shape structure.
A kind of vertical complementary type fractal antenna disclosed according to the present invention comprises: an insulated substrate; A plurality of signals layers are formed by conductor material, and each signals layer has one first broken shape structure, and the wherein said first broken shape structure is to be that benchmark piles up the back and forms with a basic pattern, and the number of times that piles up is not less than 1; And a plurality of ground planes, form by conductor material, each ground plane has one second a broken shape structure that is complementary to the described first broken shape structure, its empty area is not less than the area of the described first broken shape structure, wherein the signals layer of one group of antenna is organized the relative adjacency with ground plane of signals layer of antenna with ground plane and another, and perhaps the signals layer of one group of antenna is relative with ground plane at interval staggered in twos with the signals layer of ground plane and another group antenna.
According to the embodiment of the present invention, in order to dwindle the purpose of antenna volume and integration ground connection, adopt the vertical complementary type antenna structure.In early days because so the radiation effect of the simple vertical complementary type antenna ground of antenna structure is limited, but at vertical complementary type antenna disclosed in this invention is advantage in conjunction with the microstrip-type fractal antenna, on the antenna upper strata is fractal antenna, the complementary type fractal ground connection of lower floor, not only can increase radiation, can also reduce the antenna overall volume, and aerial radiation is preferable to the rear end isolation.
Below in execution mode, be described in detail detailed features of the present invention and advantage, its content is enough to make any those of ordinary skill in the art to understand technology contents of the present invention and is implemented, and according to the disclosed content of this specification, claim and accompanying drawing, any those of ordinary skill in the art can understand purpose and the advantage that the present invention is correlated with easily.
Above about content of the present invention explanation and the explanation of following execution mode be in order to demonstration with explain principle of the present invention, and provide broken shape of the present invention further to explain.
Description of drawings
Fig. 1 is the execution mode of vertical complementary type antenna disclosed in this invention.
Fig. 2 is the execution mode of the first broken shape structure of vertical complementary type antenna disclosed in this invention.
Fig. 3 is the execution mode of the second broken shape structure of vertical complementary type antenna disclosed in this invention.
Fig. 4 is second execution mode of vertical complementary type antenna disclosed in this invention.
Fig. 5 is the 3rd execution mode of vertical complementary type antenna disclosed in this invention.
Fig. 6 is the 4th execution mode of vertical complementary type antenna disclosed in this invention.
Fig. 7 is the 5th execution mode of vertical complementary type antenna disclosed in this invention.
Fig. 8 A～8B is the 6th execution mode of vertical complementary type antenna disclosed in this invention.
Fig. 9 A～9B is the 7th execution mode of vertical complementary type antenna disclosed in this invention.
Figure 10 is the simulation result of vertical complementary type antenna disclosed in this invention.
Wherein, Reference numeral
10 signals layers
11 first broken shape structures
12 signals layers
13 signals layers
14 signals layers
15 signals layers
20 ground planes
21 second broken shape structures
22 ground planes
23 ground planes
24 ground planes
25 ground planes
30 leads
40 insulated substrates
41 insulated substrates
42 insulated substrates
51 slotted eyes
52 slotted eyes
61 first broken shape structures
62 second broken shape structures
Embodiment
For purpose of the present invention, structure, feature and function thereof are had further understanding, now be described in detail as follows in conjunction with execution mode.
Please refer to Fig. 1, be vertical complementary type fractal antenna disclosed in this invention, mainly be made up of with ground plane 20 signals layer 10, signals layer 10 is connected with a signal source by a lead 30.Signals layer 10 has a medium with ground plane 20, is to be an insulated substrate 40 in this execution mode, and signals layer 10 is formed at a surface of insulated substrate, and ground plane 20 is formed at another surface of insulated substrate.In another embodiment, medium can be air.
Execution mode in Fig. 1-Fig. 3, its broken shape structure for signal and explanation, are not the pattern that is used for limiting fractal antenna only, except primary structure with pile up the factor, also be not limited to and pile up number of times, comprised that common structure has: (1) Koch, (2) Minkowski, (3) Cantor, (4) torn square, (5) Mandelbrot, (6) Caley tree, (7) monkey ' s swing, (8) Sierpinski gasket, (9) Julia etc.
Please refer to Fig. 4, be second execution mode disclosed in this invention.In order to make ground plane or signals layer, slotted eye 51,52 is set, outside antenna structure to prevent electromagnetic interference (EMI) for the circuit with the rear has a good isolation degree.Be as an illustration shown in the figure with ground plane, in fact, also can be in the signals layer setting.
Please refer to Fig. 5, be the 3rd execution mode disclosed in this invention, be the mode of the setting and the signal feed-in of ground plane 20 with Fig. 1 difference.In this execution mode, be that ground plane 20 is arranged among the insulated substrate 40, and lead 30 be arranged at another surface of insulated substrate 40.
Please refer to Fig. 6, be the 4th execution mode of antenna structure disclosed in this invention, is to be provided with in the array architecture mode, and the antenna of She Zhiing can increase antenna gain in this way.In Fig. 6, the signals layer of one group of antenna is organized the relative adjacency with ground plane of signals layer of antenna with ground plane and another, promptly forms the signals layers 12,13 of two antennas on two surfaces of insulated substrate 41, forms the ground plane 22,23 of two antennas in substrate.
Please refer to Fig. 7, be the 5th execution mode of antenna structure disclosed in this invention, is that the antenna of She Zhiing can increase antenna gain in this way with the setting of orthogonal array formula frame mode.In Fig. 7, the signals layer of one group of antenna is relative with ground plane at interval staggered in twos with the signals layer of ground plane and another group antenna, promptly forming signals layer 14 on a surface of insulated substrate 42 is, among insulated substrate 42, form ground plane 24 corresponding to signals layer 14, among insulated substrate 42, form signals layer 15, form ground plane 25 corresponding to signals layer 15 on another surface of insulated substrate 42.
Please refer to Fig. 8 A-8B, the 6th execution mode for antenna structure disclosed in this invention, be made up of broken shape structure equally, the shape of the first broken shape structure 61 that wherein is arranged on signals layer is shown in Fig. 8 A, and the shape of the second broken shape structure 62 that is arranged on ground plane is shown in Fig. 8 B.In this execution mode, the second broken shape structure 62 is similar type to the first broken shape structure 61.In another embodiment, the second broken shape structure 62 is similarly similar type to the first broken shape structure 61, but the empty area that the second broken shape structure 62 etches is big than the first broken shape structure 61, for instance, the empty area of the second broken shape structure 62 than the first broken shape structure 61 big to twice.
Please refer to Fig. 9 A-9B, be the 7th execution mode of antenna structure disclosed in this invention, it forms array antenna by broken shape structure.In Fig. 9 A-9B be with the antenna structure among Fig. 8 A-8B as execution mode, certainly also can use execution mode shown in Fig. 1-7 or other broken shape shape to form array antenna.
In the above embodiment, can be on antenna resonance frequency electric current to be zero place dwindle half with the join area of antenna of signals layer and ground plane, with the shared area of minimizing antenna.
Technique effect about vertical complementary type antenna disclosed in this invention please refer to Figure 10, the substrate thickness that adopts is 20mil (mil), DK (dielectric constant, dielectric constant)=3, DF (dissipation factor, the factor of scattering and disappearing)=0.02, come comparison antenna bandwidth effect with the complementary structure that the second broken shape structure is arranged with no complementary structure (the first broken shape structure is only arranged) respectively.The curve that has round dot among the figure is to be complementary structure, and another curve that does not have round dot is to be incomplementarity formula structure.
Observe the resonance frequency (S11) of antenna and can find that the frequency range of complementary antenna disclosed in this invention is also wideer than general fractal antenna really, particularly at HFS, the frequency range that only has a general antenna of the first broken shape structure is about 7.3GHz～8.4GHz (frequency range～1.1GHz), (frequency range～3.0GHz) is so complementary structure has been improved the frequency range of antenna really and the frequency range with complementary type fractal antenna of the first broken shape structure and the second broken shape structure is about 6.8GHz～9.8GHz.
By above explanation, the present invention utilizes the characteristic of fractal antenna multiband, and design one complementary ground structure makes ground connection also can treat as radiant body, and then dwindles the volume that antenna integral body takies on the fractal antenna vertical direction on plane.
Certainly; the present invention also can have other numerous embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (19)
1. a vertical complementary type fractal antenna is characterized in that, includes:
One first broken shape structure is that benchmark piles up back formation with a basic pattern, and the number of times that piles up is not less than 1; And
One second broken shape structure is complementary to the described first broken shape structure, and its empty area is not less than the area of the described first broken shape structure,
Wherein electric current is zero part on antenna resonance frequency, and the empty area of the area of the described first broken shape structure and the described second broken shape structure is respectively full-sized 1/2nd of the described first broken shape structure and the described second broken shape structure.
2. vertical complementary type fractal antenna as claimed in claim 1 is characterized in that:
The wherein said second broken shape structure is a benchmark with the described first broken shape structure, and the partially-etched back of a conductor material corresponding to the described first broken shape structure formed.
3. vertical complementary type fractal antenna as claimed in claim 1 is characterized in that:
The empty area of the wherein said second broken shape structure is not more than two times of area of the described first broken shape structure.
4. vertical complementary type fractal antenna as claimed in claim 1 is characterized in that:
Wherein also include a medium, be arranged between the described first broken shape structure and the described second broken shape structure.
5. vertical complementary type fractal antenna as claimed in claim 4 is characterized in that:
Wherein said medium is to be an insulated substrate or air.
6. vertical complementary type fractal antenna as claimed in claim 5 is characterized in that:
The wherein said first broken shape structure is formed at a surface of described insulated substrate, and the described second broken shape structure is formed among another surface or described insulated substrate of described insulated substrate.
7. vertical complementary type fractal antenna as claimed in claim 1 is characterized in that:
Wherein also include the slotted eye of at least one.
8. vertical complementary type fractal antenna as claimed in claim 1 is characterized in that, comprising:
One signals layer is formed by conductor material, has the described first broken shape structure; And
One ground plane is formed by conductor material, has described second a broken shape structure that is complementary to the described first broken shape structure.
9. vertical complementary type fractal antenna as claimed in claim 8 is characterized in that:
The wherein said second broken shape structure is to be benchmark with the described first broken shape structure, and the partially-etched back of described ground plane corresponding to the described first broken shape structure formed.
10. vertical complementary type fractal antenna as claimed in claim 8 is characterized in that:
The empty area of the wherein said second broken shape structure is not more than two times of area of the described first broken shape structure.
11. vertical complementary type fractal antenna as claimed in claim 8 is characterized in that:
Wherein also include a medium, be arranged between described signals layer and the described ground plane.
12. vertical complementary type fractal antenna as claimed in claim 11 is characterized in that:
Wherein said medium is to be an insulated substrate or air.
13. vertical complementary type fractal antenna as claimed in claim 12 is characterized in that:
Wherein said signals layer is a surface that is arranged at described insulated substrate, and described ground plane is to be formed among another surface or described insulated substrate of described insulated substrate.
14. vertical complementary type fractal antenna as claimed in claim 8 is characterized in that:
Wherein said signals layer also includes at least one slotted eye.
15. vertical complementary type fractal antenna as claimed in claim 8 is characterized in that:
Wherein said ground plane also includes at least one slotted eye.
16. a vertical complementary type fractal antenna is characterized in that, includes:
One insulated substrate;
A plurality of signals layers are formed by conductor material, and each signals layer has one first broken shape structure, and the wherein said first broken shape structure is to be that benchmark piles up the back and forms with a basic pattern, and the number of times that piles up is not less than 1; And
A plurality of ground planes are formed by conductor material, and each ground plane has one second a broken shape structure that is complementary to the described first broken shape structure, and its empty area is not less than the area of the described first broken shape structure,
Wherein the signals layer of one group of antenna is organized the relative adjacency with ground plane of signals layer of antenna with ground plane and another, and perhaps the signals layer of one group of antenna is relative with ground plane at interval staggered in twos with the signals layer of ground plane and another group antenna.
17. vertical complementary type fractal antenna as claimed in claim 16 is characterized in that:
The wherein said second broken shape structure is to be benchmark with the described first broken shape structure, and the partially-etched back of described ground plane corresponding to the described first broken shape structure formed.
18. vertical complementary type fractal antenna as claimed in claim 16 is characterized in that:
The empty area of the wherein said second broken shape structure is not more than two times of area of the described first broken shape structure.
19. an array antenna has a plurality of as claim 1,8 or 16 described vertical complementary type fractal antennas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2005100753878A CN1881681B (en) | 2005-06-16 | 2005-06-16 | Vertical complementary type fractal antenna |
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| CN2005100753878A CN1881681B (en) | 2005-06-16 | 2005-06-16 | Vertical complementary type fractal antenna |
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| CN1881681A CN1881681A (en) | 2006-12-20 |
| CN1881681B true CN1881681B (en) | 2010-09-08 |
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| CN2005100753878A Expired - Fee Related CN1881681B (en) | 2005-06-16 | 2005-06-16 | Vertical complementary type fractal antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI501465B (en) * | 2012-03-01 | 2015-09-21 | Tai Saw Technology Co Ltd | Quasi-fractal antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6140975A (en) * | 1995-08-09 | 2000-10-31 | Cohen; Nathan | Fractal antenna ground counterpoise, ground planes, and loading elements |
| US6476766B1 (en) * | 1997-11-07 | 2002-11-05 | Nathan Cohen | Fractal antenna ground counterpoise, ground planes, and loading elements and microstrip patch antennas with fractal structure |
| CN1581581A (en) * | 2003-08-14 | 2005-02-16 | 大同股份有限公司 | Slotted antenna for portable wireless communication device |
-
2005
- 2005-06-16 CN CN2005100753878A patent/CN1881681B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6140975A (en) * | 1995-08-09 | 2000-10-31 | Cohen; Nathan | Fractal antenna ground counterpoise, ground planes, and loading elements |
| US6476766B1 (en) * | 1997-11-07 | 2002-11-05 | Nathan Cohen | Fractal antenna ground counterpoise, ground planes, and loading elements and microstrip patch antennas with fractal structure |
| CN1581581A (en) * | 2003-08-14 | 2005-02-16 | 大同股份有限公司 | Slotted antenna for portable wireless communication device |
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| CN1881681A (en) | 2006-12-20 |
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