CN102904064B - Antenna - Google Patents
Antenna Download PDFInfo
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- CN102904064B CN102904064B CN201210375485.3A CN201210375485A CN102904064B CN 102904064 B CN102904064 B CN 102904064B CN 201210375485 A CN201210375485 A CN 201210375485A CN 102904064 B CN102904064 B CN 102904064B
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Abstract
The invention relates to an antenna, comprising a micro-strip exciter (1) and a chamber (2), wherein the diameter of the top of the chamber (2) is greater than that of the bottom of the chamber (2); the chamber (2) comprises a plurality of cone-shaped chambers sequentially distributed from bottom to top; the slopes of the plurality of cone-shaped chambers distributed from bottom to top are gradually increased; and the micro-strip exciter is located in the chamber (2). The antenna is high in gain, miniaturized, simple in structure and easy to process.
Description
Technical field
The present invention relates to a kind of antenna.
Background technology
In field of microwave communication, the phased array antenna that certain satellite S frequency range phased array antenna (being operated in the reception antenna of S frequency range) is high-gain large area scanning, working method is double-circle polarization, simultaneously for improving the ability of scouting intercepted signal, and reduce antenna element and number of active lanes, high-gain and miniaturized requirement are proposed to bay.The common method being used for improving antenna element gain is the antenna of band radiating enclosures, such as increase horn structure in microband paste radiation direction and improve gain, but such structural antenna efficiency comparison is low, antenna pattern main lobe symmetry and roll-off poor, and antenna overall dimensions and quality comparation large.The shortcoming that current domestic and international existing high-gain enhancement mode antenna has mostly is: a. size is large, and volume is large, and aperture efficiency is low; B. complex structure, not easily processes.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of high-gain, miniaturization, structure antenna that is simple, that easily process are provided.
Above-mentioned purpose of the present invention is achieved by following technical solution:
A kind of antenna, comprises micro-strip exciter and cavity; The top diameter of cavity is larger than base diameter; Described cavity comprises the multiple cone-shaped cavities distributed successively from top to bottom, and the slope of the multiple cone-shaped cavities distributed from top to bottom becomes large gradually; Described micro-strip exciter is positioned at cavity.
Described multiple cone-shaped cavity is 3.
The height of each cone-shaped cavity is equal to 1/4 operation wavelength.
Described micro-strip exciter comprises upper strata parasitic patch, lower floor's radiation patch and dielectric support rod; Upper strata parasitic patch and lower floor's radiation patch are suspended from air by described dielectric support rod.
Described upper strata parasitic patch and lower floor's radiation patch are circle.
Described dielectric support rod is four polyimide media rods.
The bottom of described cavity is as the ground plate of micro-strip exciter.
Described antenna also comprises feed part, and described current feed department divides and comprises multiple coaxial feed probe, forms multiple through hole for holding described feed probes in the bottom of cavity, and described multiple coaxial feed probe contacts with lower floor radiation patch.
Described multiple coaxial feed probe is 4 square coaxial feed probe.
The present invention compared with prior art tool has the following advantages:
1, by adopting multistage gradual change cone-shaped cavity structure, effectively can reduce cavity cross-section, making it that there is cramped construction; Adopt this sudden change discontinuous construction, strengthen the remarkable of local field strength in cavity to concentrate, backward radiation electromagnetic wave is reflected, and with forward radiation ripple in-phase stacking, the final forward radiation strengthening antenna to greatest extent, thus making antenna obtain high-gain and good main lobe characteristic, antenna aperture efficiency reaches 94.8%; Compact being convenient to of antenna structure organizes battle array, can realize miniaturization and the lightweight of array;
2, antenna structure of the present invention overcomes the shortcomings of traditional corrugated horn and helical antenna, and have the advantage that intensity is high, section is low, structure is simple, easily process and easily install, electrical property is excellent, achieves high-gain and high efficiency.
3, adopt this antenna to be convenient to realize miniaturization and the lightweight of aerial array as array element, therefore in phased array antenna system, be with a wide range of applications in especially high rail reconnaissance spacecraft reception antenna system.
Accompanying drawing explanation
Fig. 1 is high-gain of the present invention multistage gradual change cone-shaped cavity antenna structure view;
Fig. 2 is high-gain of the present invention multistage gradual change cone-shaped cavity antenna structure profile;
Fig. 3 is micro-strip exciter structural representation of the present invention;
Fig. 4 is multi-stage taper radiating enclosures structural representation of the present invention;
Fig. 5 is the present invention's square coaxial feed part-structure schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, content of the present invention is described in further detail:
Be illustrated in figure 1 antenna structure view of the present invention, be illustrated in figure 2 antenna structure profile of the present invention, antenna of the present invention comprises micro-strip exciter 1, multistage gradual change cone of radiation cavity 2 and feed part 3 as seen from the figure.The open top of multistage gradual change cone of radiation cavity 2, bottom lock.The diameter at top is larger than the diameter of bottom.The slope of multistage gradual change cone of radiation cavity 2 becomes large successively.Micro-strip exciter 1 is positioned at cavity 2, and is arranged on the bottom centre position of cavity 2; Micro-strip exciter 1 feed is given by feed part 3.Adopt multistage gradual change cone-shaped cavity can improve antenna efficiency and gain, reduce antenna section height simultaneously.Antenna maximum caliber in present embodiment is within the scope of 250mm ~ 265mm, and antenna section height is maximum within the scope of 95mm ~ 105mm.The progression determining cone-shaped cavity is required according to antenna gain requirement, antenna aperture and section height; Progression is fewer, and antenna section height is lower, but to reach 15dBi gain, then can make antenna pattern main lobe symmetry and roll-off poor, antenna aperture efficiency step-down simultaneously; Progression is higher, antenna square chart main lobe symmetry and roll-off better, but antenna section height is higher, is unfavorable for the miniaturization and the lightweight that realize antenna, progression too much also can cause antenna aperture utilization ratio to reduce, simultaneously also because the increase of mutual coupling will be unfavorable for antenna array.Cone slope is determined by every grade of cone-shaped cavity height and cone-shaped cavity bottom surface, end face diameter, every grade of cone-shaped cavity height is equal to 1/4 operation wavelength, require according to antenna gain and improve antenna aperture efficiency goal to greatest extent, in reinforcement cavity, local field strength is concentrated, and optimal design goes out every grade of cone-shaped cavity bottom surface and end face diameter.
As shown in Figure 3, micro-strip exciter 1 is made up of upper strata parasitic patch 4, lower floor's radiation patch 5 and passive four polyimide material dielectric support rods 6.Four polyimide material dielectric support rods 6 are evenly distributed on circumferentially same, for upper strata parasitic patch 4, lower floor's radiation patch 5 being suspended from air.Dielectric support rod 6 one end and upper strata parasitic patch 4 are fixed, and the other end contacts (as shown in Figure 2) with the bottom of cavity 2 through lower floor's radiation patch 5.Parasitic patch 4 and radiation patch 5 all adopt circular configuration.The radius of the radius ratio lower floor radiation patch 5 of upper strata parasitic patch 4 is little, and upper strata parasitic patch 4 is mainly used for Bandwidth, and lower floor's radiation patch 5 is mainly used in regulating gain.The diameter d 4=52mm of its parasitic patch 4 at the middle and upper levels, relative to the height h4=17mm of multistage gradual change cone of radiation cavity bottom, thickness m4=1mm, the diameter d 5=75mm of radiation patch 5, relative to the height h5=5.8mm of multistage gradual change cone of radiation cavity bottom, thickness m5=1mm.Micro-strip exciter adopts double-decker, and parasitic patch and radiation patch adopt hanging structure, and support with four polyimide media rods, adopts said structure effective broadening antenna impedance bandwidth, and reduces loss.
As Fig. 2, shown in 4; Multistage gradual change cone-shaped cavity 2 is preferably three grades, be made up of first order cone-shaped cavity 7, second level cone-shaped cavity 8 and third level cone-shaped cavity 9, first order cone-shaped cavity 7 end face diameter is equal with second level cone-shaped cavity 8 basal diameter, and second level cone-shaped cavity 8 end face diameter is equal with third level cone-shaped cavity 9 basal diameter.The slope of three grades of cone-shaped cavities becomes large successively.Multistage gradual change cone-shaped cavity 2 bottom surface as ground plate, and arranges 4 for holding the square opening 10 of feed probes.Profile as shown in Figure 2, with cone-shaped cavity bottom surface line for datum line, gets to the angle between every grade of cavity bus and datum line the cone slope that tangent value is every grade of cavity.Wherein first order cone-shaped cavity 7 basal diameter d7=190mm, cone slope is k1=1.6, second level cone-shaped cavity 8 basal diameter is d8=233.4mm, cone slope is k2=3.8, third level cone-shaped cavity 9 basal diameter is d9=251.8mm, and cone slope is k3=8.5, end face diameter (maximum actinal surface diameter) 260mm, every grade of cone-shaped cavity height is equal to 1/4 operation wavelength, and multistage gradual change cone-shaped cavity 2 maximum caliber diameter is 1.86 operation wavelengths.High-gain multistage gradual change cone-shaped cavity antenna adopts 3 grades of Different Slope gradual change cone-shaped cavities, local field strength in cavity can be made significantly concentrated, antenna aperture efficiency is improve to greatest extent while reaching 15dB i high-gain, antenna pattern main lobe is close to linearly roll-offing, entire physical section height is lower simultaneously, is convenient to the miniaturization and the lightweight that realize antenna.
As shown in Figure 5, feed part 3 comprises multiple coaxial feed, described multiple coaxial feed is preferably 4 square coaxial feed, square coaxial feed is made up of square coaxial feed probe 11 and square coaxial dielectric 12 and square coaxial outer conductor 13, and 4 square coaxial feed probe 11 contact with lower floor radiation patch 5 through after the through hole 10 bottom cavity 2.4 square coaxial feed probe 11, centered by the center of circle, bottom of cavity 2, are distributed in circumferentially same; Its amplitude is identical, and phase place differs 90 ° successively.4 square coaxial feed probe, 11 pairs of lower floor's radiation patch 5 that feed part adopts phase place to differ 90 ° successively carry out balanced feeding, can conveniently obtain double-circle polarization performance, significantly improve axial ratio bandwidth and circular polarization performance.
The operation principle of antenna of the present invention is as follows:
Antenna is made up of micro-strip exciter and multistage gradual change cone-shaped cavity, micro-strip exciter adopts double-decker, be made up of the paster of upper and lower two different-diameters with height, unsettled placement, for broadening impedance bandwidth, and reduce the wastage, wherein lower floor's radiation patch is identical by 4 amplitudes, and the square coaxial feed probe that phase place differs 90 ° successively carries out balanced feeding; Multistage gradual change cone-shaped cavity have employed gradual change 3 grades of cavity body structures of Different Slope, due to the electromagnetic wave of the micro-strip exciter only TE11 pattern that radiation is single, inhibit the generation of higher mode, simultaneously these sudden change discontinuous constructions strengthen again significantly concentrating of local field strength in cavity; By complex optimum every grade cone slope and cone height, make after backward radiation reflection of electromagnetic wave with forward radiation ripple in-phase stacking, linearly roll-off until the major lobe of directional diagram is close while meeting required high-gain, and make radiating enclosures maximum caliber and section minimize, final design goes out to have the high-gain aerial of good electrical properties.
By above design, the electrical property of high-gain of the present invention multistage gradual change cone-shaped cavity antenna can reach:
Polarization mode: left-right-hand circular polarization;
Gain: 15.1dBi; Center of antenna frequency place maximum gain is 15.1dBi, and in the relative bandwidth of 7.2%, be greater than 15dBi, major lobe of directional diagram symmetry is relatively good, major lobe of directional diagram taper and roll-off very fast, and antenna aperture efficiency is 94.8%.
Standing wave: < 1.4 (in bandwidth range); This antenna can obtain the performance of VSWR < 1.4 in the relative bandwidth of 14%.
Axial ratio: < 1.2dB (in bandwidth range); In ± 25 ° of beam areas, be less than 1.2dB, circular polarization characteristics is good.
Due to the advantage that high-gain of the present invention multistage gradual change cone-shaped cavity antenna has high-gain, high efficiency, low section, antenna pattern main lobe symmetry and roll-offed, therefore 32 yuan of thinned arraies can be formed by high-gain of the present invention multistage gradual change cone-shaped cavity antenna, 2m is less than at the diameter of antenna array, in ° situation of scanning angle ± 13, gain is greater than 28.1dBi, and array Sidelobe Suppression is to being less than-16dB.
The above; be only the embodiment of the best of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
The content be not described in detail in specification of the present invention belongs to the known technology of professional and technical personnel in the field.
Claims (4)
1. an antenna, comprises micro-strip exciter (1), cavity (2) and feed part (3); The top diameter of cavity (2) is larger than base diameter; It is characterized in that: described micro-strip exciter is positioned at cavity (2), and is arranged on the bottom centre position of cavity (2), cavity (2) bottom is circular planar disk-like; Cavity (2) sidewall is that slope becomes large multistage gradual change cone-shaped cavity gradually from top to bottom, and cavity (2) sidewall is connected with cavity bottom; The bottom of described cavity (2) is as the ground plate of micro-strip exciter (1);
Described micro-strip exciter (1) comprises upper strata parasitic patch (4), lower floor's radiation patch (5) and dielectric support rod (6); Upper strata parasitic patch (4) and lower floor's radiation patch (5) are suspended from air by described dielectric support rod (6); Described upper strata parasitic patch (4) and lower floor's radiation patch (5) are circle; Described dielectric support rod (6) is four polyimide media rods (6); The radius of radius ratio lower floor radiation patch (5) of upper strata parasitic patch (4) is little;
Described feed part (3) comprises multiple coaxial feed probe, forms multiple through hole for holding described feed probes in the bottom of cavity (2), and described multiple coaxial feed probe contacts with lower floor's radiation patch (5).
2. antenna according to claim 1, is characterized in that: described multistage gradual change cone-shaped cavity is 3 grades of gradual change cone-shaped cavities.
3. antenna according to claim 1 and 2, is characterized in that: the height of every grade of cone-shaped cavity is equal to 1/4 operation wavelength.
4. antenna according to claim 1, is characterized in that: described multiple coaxial feed probe is 4 square coaxial feed probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210375485.3A CN102904064B (en) | 2012-09-29 | 2012-09-29 | Antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210375485.3A CN102904064B (en) | 2012-09-29 | 2012-09-29 | Antenna |
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| CN102904064A CN102904064A (en) | 2013-01-30 |
| CN102904064B true CN102904064B (en) | 2015-02-11 |
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| CN201210375485.3A Active CN102904064B (en) | 2012-09-29 | 2012-09-29 | Antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181050B (en) * | 2017-04-06 | 2020-01-07 | 上海交通大学 | High-gain circularly polarized array antenna of bowl-shaped high-impedance reflector |
| CN110828983A (en) * | 2019-10-18 | 2020-02-21 | 江苏三和欣创通信科技有限公司 | Dual-frequency microstrip antenna device |
| CN111525275A (en) * | 2020-05-06 | 2020-08-11 | 合肥若森智能科技有限公司 | Variable polarization luneberg lens antenna |
| CN111740214B (en) * | 2020-06-20 | 2022-08-05 | 北京华龙通科技有限公司 | Measuring antenna adopting wave dish-shaped director |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101170220B (en) * | 2007-10-30 | 2011-04-27 | 北京卫星信息工程研究所 | Dual-frequency band and dual round polarization rear radiation spiral antenna |
| CN101436715A (en) * | 2008-12-05 | 2009-05-20 | 邢红兵 | Dual polarization back cavity type radiating antenna |
| CN201601227U (en) * | 2009-12-15 | 2010-10-06 | 西安科技大学 | Indoor MIMO antenna |
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