CN102800968B - Nested composite ring microstrip multi-frequency antenna for Beidou navigation system - Google Patents
Nested composite ring microstrip multi-frequency antenna for Beidou navigation system Download PDFInfo
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- CN102800968B CN102800968B CN201210277257.2A CN201210277257A CN102800968B CN 102800968 B CN102800968 B CN 102800968B CN 201210277257 A CN201210277257 A CN 201210277257A CN 102800968 B CN102800968 B CN 102800968B
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Abstract
The invention discloses a nested composite ring microstrip multi-frequency antenna for a Beidou navigation system, relating to a nested composite ring antenna. The invention provides a nested composite ring microstrip multi-frequency antenna for a Beidou navigation system, which has low return loss, high gain and low interference and realizes omnidirectional radiation characteristics. The antenna is provided with a substrate; both sides of the substrate are coated with a copper rectangular substrate; one side of the substrate is etched into a radiation patch, and the other side of the substrate is used as a ground plane; the radiation patch extends outward from the smallest square nested ring at the inner layer to the nested ring at the middle layer, and then extends from the nested ring at the middle layer to the nested ring at the outermost layer; the smallest square nested ring at the inner layer, the nested ring at the middle layer and the nested ring at the outermost layer form a nested composite ring; and the arms of the smallest square nested ring at the inner layer, the nested ring at the middle layer and the nested ring at the outermost layer are equal in width.
Description
Technical field
The present invention relates to a kind of nested complex loop antenna, relate in particular to the micro-band multifrequency antenna of a kind of nested complex loop for triones navigation system.
Background technology
Since two thousand, China has succeeded in sending up navigation positioning satellite of 4 Big Dippeves and No. two navigation positioning satellites of 8 Big Dippeves, and built navigation experiment system of the Big Dipper is also being built No. two global position systems of the Big Dipper covering the whole world.This navigation system possesses location, time service, message and the GPS GPS wide area differential GPS function within the scope of China and surrounding area thereof at present, and at numerous areas such as mapping, telecommunications, water conservancy, communications and transportation, fishery, exploration, forest fire protection and national security, has progressively played a significant role.Antenna, as the vitals of satellite navigation, plays an important role to the quality of satellite navigation system.
Along with the development of Technique of Satellite Navigation and Positioning, satellite navigation system application is constantly expanded, and its terminal receiver type is also more and more.According to purposes, can be divided into vehicular, carrier-borne formula, machine-carried type, spaceborne formula and missile-borne formula etc.So it to terminal antenna require there is electrical characteristic, mechanical property, the stronger ability conforming.Conventional ICBM SHF satellite terminal antenna has crossed dipole antenna, four-arm spiral antenna, microstrip antenna and helical antenna at present.Wherein, microstrip antenna is widely used in ICBM SHF satellite terminal receiving equipment with its good performance.Nineteen fifty-three, professor G.A.DeschamPs proposes to utilize the radiation of microstrip line to make micro-concept with microwave antenna, and nineteen fifty-five H.Gutton and G.Baissinot have applied for patent.1972, awns gloomy (R.E.Munson) and Howell (J.Q.Howell) etc. were succeeded in developing first practical microstrip antenna, and along with the photoetching technique of substrate and the appearance of various low-loss mechanism material, microstrip antenna has obtained developing by leaps and bounds afterwards.Aspect Bandwidth, the people such as CamNguyen has proposed to adopt the modes such as medium substrate, antenna loading, employing, bore coupling of different materials to carry out widening frequency band bandwidth.While realizing double frequency or multifrequency antenna how, D.M.Pozar and K-L professor Wong etc. have proposed to adopt same paster, by the method that loads or crack, change the field distribution of the various natural norms of paster, and then resonance frequency is modulated, finally realize double frequency or multiple-frequency operation; For circular polarization technical elements, a kind of microstrip antenna of bore dual-band dual-circular polarization has altogether been designed in the Zhu Yanling of domestic Xian Electronics Science and Technology University and Jiao Yongchang etc., by working in the nested requirement that realizes dual-band dual-circular polarization of radiation patch of higher mode and main mould, the line polarization wave amplitude that not only can evoke two patterns by feed in addition equates, during 90 ° of phase differences, just can obtain the radiated wave of circular polarization, can also realize circular polarization by quadrature double-fed; Miniaturization for antenna, Hately, M.C and Kabbary, F.M, Stewant, B.G has invented cross field antenna, and this is also small size antenna the earliest, and after this people have worked out and can adopt high-k, cracked, meander technology, loaded the miniaturization that grounding probe, pbg structure, the technology such as fractal realize antenna.
The micro-realization with multifrequency antenna of nested complex loop based on triones navigation system, major measure has: the coupled resonance frequency modulation technology of radiative unit structure, feed-in structure comprises the position of distributing point and presents gap adjustment, each arm intersecting angle, nested rings size etc.Because the radiating element of this antenna is rectangular radiation patch, with frequency modulation structure, there is Stability Analysis of Structures, save material, cover the advantages such as even, and can reach the requirements of satellite system to terminal antenna such as the Big Dipper and GPS.
Summary of the invention
The object of the present invention is to provide a kind of return loss low, gain high, disturb little and there is the micro-band multifrequency antenna of the nested complex loop for triones navigation system of omnidirectional radiation characteristic.
The present invention is provided with substrate, and described substrate is double-side copper-applying rectangular substrate, and the one side of described substrate is etched into radiation patch, and the another side of substrate is as ground plane; Described radiation patch is to extend outwardly into time outer field nested rings by internal layer smallest square nested rings, and then extend to outermost nested rings by inferior outer field nested rings, described internal layer smallest square nested rings, inferior outer field nested rings form nested complex loop with outermost nested rings, and the width of each arm of described internal layer smallest square nested rings, inferior outer field nested rings and outermost nested rings equates.
Described substrate can adopt ceramic dielectric substrate, and the length of side of substrate can be 25mm ± 0.05mm, and thickness can be 3mm ± 0.05mm.
The width of each arm of described internal layer smallest square nested rings, inferior outer field nested rings and outermost nested rings can be 1～3mm, and the distance between each arm can be 1～4mm; The length of each folding arm of internal layer smallest square nested rings can be 4～10mm, and the length of each folding arm of inferior outer field nested rings can be 8～18mm, and the length of each folding arm of outermost nested rings can be 16～28mm.Folding intersection in 90 ° between each radiation arm of this radiation patch, forms closed nested ring, thus increased antenna bandwidth, reduced antenna return loss, improved antenna gain etc., further optimized the performance of antenna.
Distance between described internal layer smallest square nested rings and time outer field nested rings can be 2mm ± 0.05mm, and the distance between inferior outer field nested rings and outermost nested rings can be 2.5mm ± 0.05mm; The folding brachium of described internal layer smallest square nested rings can be 8mm ± 0.05mm; The length of the folding arm of inferior outer field nested rings can be 15mm ± 0.05mm, and the length of the folding arm of outermost nested rings can be 22mm ± 0.05mm.
The present invention adopts the Rectangular Enclosure with Participating Media substrate of double-sided metal good conductor, in the one side of substrate, is prepared into the ground plate that is covered with good conductor, and another side is prepared into the radiation patch that is covered with specific morphology.This radiation patch is to extend outwardly into time outer field nested rings by the minimum positive square nested rings of internal layer, and then extends to outermost nested rings by inferior outer field nested rings, and this similar fractal form forms the radiation patch of microstrip antenna.
The present invention also adopts the form of coaxial feed, distributing point is on outermost layer nested rings transposition arm, and the horizontal range apart from central point (we are defined as central point the central point of medium substrate) can be 9mm ~ 10mm, distributing point can be 0mm ~ 2mm apart from the vertical range of central point, and the 1mm ~ 3mm that can the vertical direction on outermost layer nested rings transposition arm fluctuates; And can double-fed be set as required, realize intensive multimodal characteristic.
Basic structure of the present invention can guarantee after optimization that frequency covers whole frequency range requirements of Beidou satellite system by adjusting the scope of above each parameter, and S
11can reach-below 10dB, more than gain can reach 2.5dB.
Compare with conventional satellite antenna, the present invention has following outstanding advantage and significant technique effect:
The present invention has adopted the nested rings structure of folding spiral, because nested rings has different resonance lengths, this antenna has similar fractal feature simultaneously, also just make this antenna obtain miniaturization, broadening the bandwidth of antenna, and obtained multi-frequency Characteristic, meet the satellite communication systems such as big-dipper satellite and GPS to the requirement of terminal antenna in, be also expected to compatible other application bands.
Owing to having adopted above-mentioned new structure, this antenna has the feature of omnidirectional radiation, and groundwork frequency is 1.61GHz and 2.49GHz, and working frequency range may be locked in the multiband of 1.605～1.621GHz, 2.485～2.51GHz, absolute bandwidth is better than 10MHz, and relative bandwidth is better than 0.6%.
In sum, the present invention has that structure is new, size is little, radiation characteristic is good, frequency is controlled, it is high to gain, return loss is low, simple in structure, production cost is low, the advantage such as little affected by environment, can meet the requirements of navigation system to terminal antenna such as the Big Dipper and GPS.
Satellite navigation system terminal antenna.Utilize structural optimization of the present invention, can be locked in flexibly and easily Big Dipper series global position system by demand, the many radiation arms of nested composite construction, are also expected to the different frequency range of compatible other satellite navigation system antennas.
The present invention adopts that this radiation patch not only has novel structure, size is little, and the advantage such as it is high to have gain, and return loss is little, and directional characteristic is good.
Accompanying drawing explanation
Fig. 1 is the micro-band multifrequency antenna of the nested complex loop radiation patch structural representation based on triones navigation system of the embodiment of the present invention.
Fig. 2 is the micro-band multifrequency antenna of the nested complex loop side schematic view based on triones navigation system of the embodiment of the present invention.
Fig. 3 is the micro-return loss (S with multifrequency antenna of the nested complex loop based on triones navigation system of the embodiment of the present invention
11) performance map.In Fig. 4, abscissa represents frequency Frequency (GHz), and ordinate represents return loss intensity The return loss of the antenna (dB).
Fig. 4 is the micro-polar coordinates E face directional diagram with multifrequency antenna of the nested complex loop based on triones navigation system of the embodiment of the present invention.
Fig. 5 is the micro-polar coordinates H face directional diagram with multifrequency antenna of the nested complex loop based on triones navigation system of the embodiment of the present invention.
Embodiment
Below in conjunction with typical three slot array embodiment and accompanying drawing, the invention will be further described.
With reference to Fig. 1 and 2, the embodiment of the present invention is provided with substrate 1, and described substrate 1 is double-side copper-applying rectangular substrate, and the one side of described substrate 1 is etched into radiation patch 2, and the another side of substrate 1 is as ground plane 3; Described radiation patch is to extend outwardly into time outer field nested rings by internal layer smallest square nested rings, and then extend to outermost nested rings by inferior outer field nested rings, described internal layer smallest square nested rings, inferior outer field nested rings form nested complex loop with outermost nested rings, the width of each arm of described internal layer smallest square nested rings, inferior outer field nested rings and outermost nested rings equates
Described substrate 1 can adopt ceramic dielectric substrate, and the length of side of substrate can be 25mm ± 0.05mm, and thickness can be 3mm ± 0.05mm.
The width of each arm of described internal layer smallest square nested rings, inferior outer field nested rings and outermost nested rings can be 1～3mm, and the distance between each arm can be 1～4mm; The length of each folding arm of internal layer smallest square nested rings can be 4～10mm, and the length of each folding arm of inferior outer field nested rings can be 8～18mm, and the length of each folding arm of outermost nested rings can be 16～28mm.Folding intersection in 90 ° between each radiation arm of this radiation patch, forms closed nested ring, thus increased antenna bandwidth, reduced antenna return loss, improved antenna gain etc., further optimized the performance of antenna.
Distance between described internal layer smallest square nested rings and time outer field nested rings can be 2mm ± 0.05mm, and the distance between inferior outer field nested rings and outermost nested rings can be 2.5mm ± 0.05mm; The folding brachium of described internal layer smallest square nested rings can be 8mm ± 0.05mm; The length of the folding arm of inferior outer field nested rings can be 15mm ± 0.05mm, and the length of the folding arm of outermost nested rings can be 22mm ± 0.05mm.
Referring to Fig. 3, as seen from Figure 3, the working frequency range of the present embodiment antenna is 1.605～1.621GHz, 2.485～2.51GHz, in working frequency range return loss all-below 10dB, be about-22.57dB of return loss minimum at 1.61GHz place, the be about-23.64dB of return loss minimum at 1.2.492GHz place.At whole passband internal antenna return loss (S
11) performance can meet the demands.The absolute bandwidth that antenna of the present invention is 1.61GHz in working frequency points is better than 10MHz, working frequency points is that the absolute bandwidth at 2.492GHz place is better than 8MHz relative bandwidth and is better than 0.32%, and this money antenna is omnidirectional radiation, therefore can be advantageously applied in the satellite systems such as big-dipper satellite and GPS.
Referring to Fig. 4 and Fig. 5, Fig. 4 is E face directional diagram, and Fig. 5 is H face directional diagram.From figure, we can see the episternites gain that adopts this new antenna structure effectively to suppress antenna, have improved antenna gain, make antenna meet well the requirement of Beidou satellite navigation system.
Referring to table 1, table 1 has provided the affect situation of manufacture mismachining tolerance of the present invention on antenna performance.
Table 1
Note: the existing certain redundancy of data in table, between each data, there is certain relevance, what provide is equalization characteristic, according to demand particular design.
Manufacture mismachining tolerance of the present invention is little on the impact of each parameter of antenna in allowed limits.For example, distance, the size of ceramic dielectric substrate, dielectric-slab copper-clad thickness, feed position equal error between folding spiral arm are controlled in 10%, and the relative dielectric constant error of ceramic dielectric substrate is while being controlled in 2%, the parameters of antenna changes little.
Embodiments of the invention have provided reception and the transmitting antenna that a frequency range is the satellite navigation system of 1.605～1.621GHz, 2.485～2.51GHz.High performance dielectric baseplate material in embodiment can adopt and be greater than 6 high-dielectric-constant ceramics or modified epoxy composite ceramics as substrate, the composite ceramics that the desirable relative dielectric constant of representative value is 10, the length of side of ceramic dielectric plate is 15～35mm, thick is 1～4mm, and can adopt representative value is the ceramic dielectric plate of 25mm * 25mm * 3mm size.
Claims (7)
1. for the micro-band multifrequency antenna of nested complex loop of triones navigation system, it is characterized in that being provided with substrate, described substrate is double-side copper-applying rectangular substrate, and the one side of described substrate is etched into radiation patch, and the another side of substrate is as ground plane; Described radiation patch is to extend outwardly into time outer field nested rings by internal layer smallest square nested rings, and then extend to outermost nested rings by inferior outer field nested rings, described internal layer smallest square nested rings, inferior outer field nested rings form nested complex loop with outermost nested rings, and the width of each arm of described internal layer smallest square nested rings, inferior outer field nested rings and outermost nested rings equates.
2. the micro-band multifrequency antenna of the nested complex loop for triones navigation system as claimed in claim 1, is characterized in that described substrate adopts ceramic dielectric substrate, and the length of side of substrate is 25mm ± 0.05mm, and thickness is 3mm ± 0.05mm.
3. the micro-band multifrequency antenna of the nested complex loop for triones navigation system as claimed in claim 1, is characterized in that the width of each arm of described internal layer smallest square nested rings, inferior outer field nested rings and outermost nested rings is 1～3mm.
4. the micro-band multifrequency antenna of the nested complex loop for triones navigation system as claimed in claim 1, is characterized in that the distance between described internal layer smallest square nested rings, inferior outer field nested rings and each arm of outermost nested rings is 1～4mm.
5. the micro-band multifrequency antenna of the nested complex loop for triones navigation system as claimed in claim 1, the length that it is characterized in that each folding arm of described internal layer smallest square nested rings is 4～10mm, the length of each folding arm of inferior outer field nested rings is 8～18mm, and the length of each folding arm of outermost nested rings is 16～28mm.
6. the micro-band multifrequency antenna of the nested complex loop for triones navigation system as claimed in claim 1, it is characterized in that the distance between described internal layer smallest square nested rings and time outer field nested rings is 2mm ± 0.05mm, the distance between inferior outer field nested rings and outermost nested rings is 2.5mm ± 0.05mm.
7. the micro-band multifrequency antenna of the nested complex loop for triones navigation system as claimed in claim 1, the folding brachium that it is characterized in that described internal layer smallest square nested rings is 8mm ± 0.05mm; The length of the folding arm of inferior outer field nested rings is 15mm ± 0.05mm, and the length of the folding arm of outermost nested rings is 22mm ± 0.05mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354809A (en) * | 2011-08-09 | 2012-02-15 | 华南理工大学 | Double-frequency and double-polarization antenna capable of operating in compass satellite navigation system and mobile third-generation (3G) network |
| CN102456947A (en) * | 2010-10-22 | 2012-05-16 | 北京协和航电科技有限公司 | Single-layer circularly symmetric GPS-BD (Global Position System-Big Dipper) dual-frequency microstrip antenna |
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| CN100385738C (en) * | 2003-09-16 | 2008-04-30 | 电子科技大学 | Directional diagram reconstructed microstrip antenna with ring-shaped groove of |
| JP2010200207A (en) * | 2009-02-27 | 2010-09-09 | Nec Corp | Multiple loop antenna |
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| CN102456947A (en) * | 2010-10-22 | 2012-05-16 | 北京协和航电科技有限公司 | Single-layer circularly symmetric GPS-BD (Global Position System-Big Dipper) dual-frequency microstrip antenna |
| CN102354809A (en) * | 2011-08-09 | 2012-02-15 | 华南理工大学 | Double-frequency and double-polarization antenna capable of operating in compass satellite navigation system and mobile third-generation (3G) network |
Non-Patent Citations (2)
| Title |
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| 用于BD-2卫星导航系统的小型化微带天线研究;陈苗苗;《万方数据库》;20120731;论文正文第73页第2行至第80页第4行，图4.16、4.20 * |
| 陈苗苗.用于BD-2卫星导航系统的小型化微带天线研究.《万方数据库》.2012,论文正文第73页第2行至第80页第4行，图4.16、4.20. * |
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