CN105896070A - Ultra-wideband microstrip antenna based on rectangular stepped structural fractal - Google Patents
Ultra-wideband microstrip antenna based on rectangular stepped structural fractal Download PDFInfo
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- CN105896070A CN105896070A CN201610266415.2A CN201610266415A CN105896070A CN 105896070 A CN105896070 A CN 105896070A CN 201610266415 A CN201610266415 A CN 201610266415A CN 105896070 A CN105896070 A CN 105896070A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
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Abstract
The invention discloses an ultra-wideband microstrip antenna based on the rectangular stepped structural fractal. The ultra-wideband microstrip antenna includes a dielectric substrate, a metal ground plate, a radiation patch unit and an impedance matching microstrip feeder. The radiation patch unit and the impedance matching microstrip feeder are arranged on the front of the dielectric substrate. The metal ground plate is arranged on the back of the dielectric substrate. The radiation patch unit includes a first-order fractal structure, a tapered slot structure, a second-order fractal structure and a transform matching microstrip feeder. The first-order fractal structure includes a first rectangular radiation patch, a second rectangular radiation patch and a third rectangular radiation patch which are arranged in an inverted ladder shape. The central portion of the first-order fractal structure is provided with the tapered slot structure which is self-similar to the first-order fractal structure. The central portion of the tapered slot structure is provided with the second-order fractal structure. By adopting a new fractal structure, the invention broadens the frequency band of the antenna, reduces the size of the antenna and enables the antenna to meet ultra-wideband characteristics in 3GHz-12.9GHz. Meanwhile, the antenna is simple in structure, low in profile, and easy to install and integrate.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of miniaturization based on rectangular step structure
Fractal ultra-wideband microstrip antenna.
Background technology
Antenna is one of most important parts in wireless telecommunications and radar system, and its performance quality directly concerns whole
The communication quality of individual system or detectivity.In recent years, along with developing rapidly of radio communication, networking covers
Region is on the increase, and the demand of various data services also sharply increases, and conventional communication equipment and pattern are
Cannot adapt to modern communications multi-service, two-forty, high-quality requirement, Antenna Design is faced with new choosing
War.For adapting to the demand for development of Modern wireless communication, the at present both at home and abroad research of antenna mainly towards miniaturization,
Several direction such as broadband and multiband is carried out.
The Antenna Design that is created as of fractals provides new approach.Fractal antenna refers to that geometry has
Self-similarity, space filling and dimension, an electrical property generally class antenna in multi-resonant characteristic.Fractal
Antenna is the product that fractals combine with antenna technology.First pass is delivered from nineteen ninety-five N.Cohen
Since the paper of fractal antenna, the upsurge of fractal antenna research does not subtracts and has realized business application.Mesh
Before the fractal structure that used both at home and abroad be concentrated mainly on Sierpinski carpet, Hilbert cueve,
On the famous fractal structures such as Cantor set, and considerable work is around the optimization of these antenna and carries out,
The most fractal kind and data are infinite many, it is easy to the new fractal structure antenna of operation can be micro-
Research with fractal antenna provides theoretical foundation and data support.
Summary of the invention
It is an object of the invention to provide a kind of ultra-wideband microstrip antenna using new fractal structure.The present invention
The described ultra-wideband microstrip antenna simple in construction fractal based on rectangular step structure, it is possible to meet
Ultra broadband characteristic requirements in the range of 3GHz-12.9GHz, fully ensures that the reliability of ultra-wideband communication system.
For achieving the above object, the technical solution used in the present invention is:
Based on the ultra-wideband microstrip antenna that rectangular step structure is fractal, including medium substrate, metal ground plate, radiation
Chip unit and impedance matching microstrip feed line, described radiation patch unit and impedance matching microstrip feed line are arranged
In the front of medium substrate, described metal ground plate is arranged on the back side of medium substrate, described radiation patch
Blade unit includes single order fractal structure, gradual change trough body structure, second order fractal structure and Transformation Matching microstrip feed line,
Described single order fractal structure includes the first rectangular radiation patch of arrangement, the second rectangular radiation in inverted steps shape
Paster and the 3rd rectangular radiation patch, offer gradual change trough body structure, gradual change cell body in the middle part of single order fractal structure
Structure and single order fractal structure self similarity, be provided with second order fractal structure in the middle part of gradual change trough body structure.
The area of described first rectangular radiation patch is 10*16mm2, the area of the second rectangular radiation patch is 3.5*12
mm2, the area of the 3rd rectangular radiation patch is 1.4*8mm2。
Described gradual change trough body structure includes the first rectangle cell body of arrangement, the second rectangle cell body and the 3rd in inverted steps shape
Rectangle cell body, the area of the first rectangle cell body is 5*8mm2, the area of the second rectangle cell body is 2.5*6mm2,
The area of the 3rd rectangle cell body is 1*4mm2。
Described second order fractal structure includes the 4th rectangular radiation patch, the 5th rectangular radiation patch and the 6th rectangular radiation
Paster, the area of the 4th rectangular radiation patch is 2.5*4mm2, the area of the 5th rectangular radiation patch is 1.5*3
mm2, the area of the 6th rectangular radiation patch is 0.6*2mm2。
Described single order fractal structure, gradual change trough body structure and second order fractal structure is all symmetrical along center of antenna longitudinal axis
Arrange.
The length of described medium substrate, width and height are respectively 35mm, 30mm and 1.6mm.
Described metal ground plate is rectangle, and the length and width of metal ground plate is respectively 11.5mm and 30mm.
The present invention on the basis of rectangular microstrip antenna, by the first rectangular radiation patch arranged in inverted steps shape,
Second rectangular radiation patch and the 3rd rectangular radiation patch composition single order fractal structure as basic radiating element,
The impedance matching of antenna can be better achieved；The present invention utilizes and is opened in the middle part of single order fractal structure and with one
The gradual change trough body structure of rank fractal structure self similarity, the further broadening bandwidth of antenna；The present invention is in gradual change
Introduce the second order fractal structure with gradual change trough body structure self similarity in the middle part of trough body structure, again change low-frequency electrical
The path of stream, reduces low-frequency resonant frequency, the most also can introduce multifrequency resonance, it is achieved thereby that antenna
Ultra broadband；Overall structure of the present invention is simple, and section is low, it is easy to install and integrated.
Accompanying drawing explanation
Fig. 1 is the structural representation of present media substrate front side；
Fig. 2 is the structural representation of present media substrate back；
Fig. 3 be in embodiment based on the fractal ultra-wideband microstrip antenna of rectangular step structure at 3GHz-12.9GHz
Interior return loss simulation result figure；
Fig. 4 be in embodiment based on the fractal ultra-wideband microstrip antenna of rectangular step structure at 3GHz-12.9GHz
The simulation result figure of interior voltage standing wave ratio；
Fig. 5 is corresponding at 3.3GHz based on the ultra-wideband microstrip antenna that rectangular step structure is fractal in embodiment
Radiation characteristic EH surface radiation directional diagram；
Fig. 6 is corresponding at 7.2GHz based on the ultra-wideband microstrip antenna that rectangular step structure is fractal in embodiment
Radiation characteristic EH surface radiation directional diagram；
Fig. 7 is corresponding at 11.3GHz based on the ultra-wideband microstrip antenna that rectangular step structure is fractal in embodiment
Radiation characteristic EH surface radiation directional diagram.
Detailed description of the invention
As shown in Figure 1 to Figure 2, a kind of ultra broadband fractal based on rectangular step structure of the present invention is micro-
Band antenna, including medium substrate 1, metal ground plate 2, radiation patch unit and impedance matching microstrip feed line 3.
Radiation patch unit and impedance matching microstrip feed line 3 are arranged on the front of medium substrate 1.Metal ground plate 2
It is arranged on the back side of medium substrate 1.The present embodiment based on rectangular microstrip antenna, i.e. use length,
Width and height respectively 35mm, 30mm and 1.6mm and the FR4 epoxy resin that dielectric constant is 4.4 cover copper
Plate, as medium substrate 1, uses length and width to be respectively the rectangle copper sheet of 11.5mm and 30mm as metal
Earth plate 2, can realize ultra broadband characteristic, can reduce again the volume of antenna.
Radiation patch unit in the present invention includes single order fractal structure, gradual change trough body structure, the fractal knot of second order
Structure and Transformation Matching microstrip feed line 4.Single order fractal structure, gradual change trough body structure and second order fractal structure are all along sky
Line center longitudinal axis is symmetrical arranged.Single order fractal structure includes the first rectangular radiation patch of the arrangement in inverted steps shape
Sheet the 5, second rectangular radiation patch 6 and the 3rd rectangular radiation patch 7.The length of the first rectangular radiation patch 5
L and width W can approximate and determine according to the following formula:
Wherein εeFor effective dielectric constant, h is thickness of dielectric layers, λ0For the wavelength of free space, c is the light velocity, εrFor
Medium relative dielectric constant.In the present embodiment, the area of the first rectangular radiation patch 5 is 10*16mm2, second
The area of rectangular radiation patch 6 is 3.5*12mm2, the area of the 3rd rectangular radiation patch 7 is 1.4*8mm2。
Impedance matching microstrip feed line 3 uses the characteristic impedance of 50 Ω, and its width can calculate according to TXLine software,
Belonging to prior art, here is omitted.The single order fractal structure of the present invention uses generally rectangular grading structure,
Impedance matching can be better achieved.
The present invention offers gradual change trough body structure in the middle part of single order fractal structure, and gradual change trough body structure divides with single order
Shape structure self similarity, including first rectangle cell body the 8, the second rectangle cell body 9 and the 3rd arranged in inverted steps shape
Rectangle cell body 10, gradual change trough body structure can change the flow direction of electric current in radiation patch, thus increase effective road
Footpath, the bandwidth of further broadening antenna.Wherein, self similarity is the existing noun in fractal structure, this area
Technical staff is expressly understood that its implication, the problem that the most there is not insufficient disclosure.In the present embodiment
The area of the first rectangle cell body 8 is 5*8mm2, the area of the second rectangle cell body 9 is 2.5*6mm2, the 3rd square
The area of shape cell body 10 is 1*4mm2。
The present invention is provided with second order fractal structure in the middle part of gradual change trough body structure, including the 4th rectangular radiation patch
11, the 5th rectangular radiation patch 12 and the 6th rectangular radiation patch 13, second order fractal structure can reduce low frequency
Resonant frequency, improves the low frequency matching problem of antenna, can realize multifrequency resonance phenomena simultaneously.In this enforcement
The area of four rectangular radiation patch 11 is 2.5*4mm2, the area of the 5th rectangular radiation patch 12 is 1.5*3mm2,
The area of the 6th rectangular radiation patch 13 is 0.6*2mm2.One end of Transformation Matching microstrip feed line 4 connects the
The bottom of six rectangular radiation patch 13, the other end of Transformation Matching microstrip feed line 4 is connected to the second rectangular radiation
Paster 6, it is achieved the impedance matching between single order fractal structure and second order fractal structure.
As shown in Figure 3 and Figure 4, utilize HFSS11 software to dividing based on rectangular step structure in the present embodiment
The ultra-wideband microstrip antenna of shape carries out simulation optimization, it is known that this antenna return loss in 3GHz-12.9GHz
Parameter S11 is less than-10dB, meets ultra broadband characteristic；This antenna voltage standing wave ratio in 3GHz-12.9GHz
VSWR is less than 2, meets the requirement of communication system engineering.As shown in Figures 5 to 7, the base in the present embodiment
The ultra-wideband microstrip antenna H face fractal in rectangular step structure is all protected at 3.3GHz, 7.2GHz and 11.3GHz
Hold good omnidirectional radiation characteristic.
The ultra-wideband microstrip antenna fractal based on rectangular step structure of the present invention is new fractal by using
Structure, both broadening antenna frequency band, reduced antenna volume, achieved again antenna in 3GHz-12.9GHz
Meeting ultra broadband characteristic, antenna structure is simple simultaneously, and section is low, it is easy to install and integrated.
Claims (7)
1. based on the ultra-wideband microstrip antenna that rectangular step structure is fractal, including medium substrate, metal ground plate, radiation patch unit and impedance matching microstrip feed line, described radiation patch unit and impedance matching microstrip feed line are arranged on the front of medium substrate, described metal ground plate is arranged on the back side of medium substrate, it is characterized in that: described radiation patch unit includes single order fractal structure, gradual change trough body structure, second order fractal structure and Transformation Matching microstrip feed line, described single order fractal structure includes the first rectangular radiation patch of arrangement in inverted steps shape, second rectangular radiation patch and the 3rd rectangular radiation patch, gradual change trough body structure is offered in the middle part of single order fractal structure, gradual change trough body structure and single order fractal structure self similarity, second order fractal structure it is provided with in the middle part of gradual change trough body structure.
2. as claimed in claim 1 based on the ultra-wideband microstrip antenna that rectangular step structure is fractal, it is characterised in that: the area of described first rectangular radiation patch is 10*16mm2, the area of the second rectangular radiation patch is 3.5*12 mm2, the area of the 3rd rectangular radiation patch is 1.4*8 mm2。
3. as claimed in claim 2 based on the ultra-wideband microstrip antenna that rectangular step structure is fractal, it is characterized in that: described gradual change trough body structure includes the first rectangle cell body, the second rectangle cell body and the 3rd rectangle cell body of arrangement in inverted steps shape, and the area of the first rectangle cell body is 5*8mm2, the area of the second rectangle cell body is 2.5*6 mm2, the area of the 3rd rectangle cell body is 1*4 mm2。
4. as claimed in claim 3 based on the ultra-wideband microstrip antenna that rectangular step structure is fractal, it is characterized in that: described second order fractal structure includes the 4th rectangular radiation patch, the 5th rectangular radiation patch and the 6th rectangular radiation patch, and the area of the 4th rectangular radiation patch is 2.5*4mm2, the area of the 5th rectangular radiation patch is 1.5*3 mm2, the area of the 6th rectangular radiation patch is 0.6*2 mm2。
5. as claimed in claim 4 based on the ultra-wideband microstrip antenna that rectangular step structure is fractal, it is characterised in that: described single order fractal structure, gradual change trough body structure and second order fractal structure are all symmetrical arranged along center of antenna longitudinal axis.
6. as claimed in claim 5 based on the ultra-wideband microstrip antenna that rectangular step structure is fractal, it is characterised in that: the length of described medium substrate, width and height are respectively 35mm, 30mm and 1.6mm.
7. as claimed in claim 6 based on the ultra-wideband microstrip antenna that rectangular step structure is fractal, it is characterised in that: described metal ground plate is rectangle, and the length and width of metal ground plate is respectively 11.5mm and 30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610266415.2A CN105896070B (en) | 2016-04-26 | 2016-04-26 | Divide the ultra-wideband microstrip antenna of shape based on rectangular step structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610266415.2A CN105896070B (en) | 2016-04-26 | 2016-04-26 | Divide the ultra-wideband microstrip antenna of shape based on rectangular step structure |
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| CN105896070A true CN105896070A (en) | 2016-08-24 |
| CN105896070B CN105896070B (en) | 2019-03-12 |
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| CN201610266415.2A Expired - Fee Related CN105896070B (en) | 2016-04-26 | 2016-04-26 | Divide the ultra-wideband microstrip antenna of shape based on rectangular step structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069218A (en) * | 2017-05-09 | 2017-08-18 | 中电科微波通信（上海）股份有限公司 | Radiating guide and receiving system |
| CN109037936A (en) * | 2018-07-27 | 2018-12-18 | 东华大学 | A kind of broadband microstrip patch antenna |
| WO2021000147A1 (en) * | 2019-06-30 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Radiation element and antenna |
| CN112798830A (en) * | 2021-03-18 | 2021-05-14 | 深圳大学 | Switching device suitable for multi-antenna test and use method thereof |
| CN114709608A (en) * | 2022-04-13 | 2022-07-05 | 河北工业大学 | Novel ultra-wideband planar monopole antenna |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102694247A (en) * | 2012-05-08 | 2012-09-26 | 哈尔滨工程大学 | Integrated narrow band/ultra wide band cognitive radio antenna |
| CN102969564B (en) * | 2012-11-30 | 2015-10-28 | 华南理工大学 | The pocket super-broadband trap antenna that second order notch bandwidth is controlled |
| CN103259086B (en) * | 2013-04-19 | 2016-05-11 | 郑州轻工业学院 | A kind of super wide band plane Miniaturized Microstrip Antennas |
| CN204696234U (en) * | 2014-07-04 | 2015-10-07 | 云南大学 | A kind of ultra-wideband antenna based on fractal structure |
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2016
- 2016-04-26 CN CN201610266415.2A patent/CN105896070B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069218A (en) * | 2017-05-09 | 2017-08-18 | 中电科微波通信（上海）股份有限公司 | Radiating guide and receiving system |
| CN107069218B (en) * | 2017-05-09 | 2023-06-23 | 中电科微波通信（上海）股份有限公司 | Waveguide antenna and signal receiving system |
| CN109037936A (en) * | 2018-07-27 | 2018-12-18 | 东华大学 | A kind of broadband microstrip patch antenna |
| WO2021000147A1 (en) * | 2019-06-30 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Radiation element and antenna |
| CN112798830A (en) * | 2021-03-18 | 2021-05-14 | 深圳大学 | Switching device suitable for multi-antenna test and use method thereof |
| CN114709608A (en) * | 2022-04-13 | 2022-07-05 | 河北工业大学 | Novel ultra-wideband planar monopole antenna |
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| CN105896070B (en) | 2019-03-12 |
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Granted publication date: 20190312 Termination date: 20210426 |