CN102904064A - Antenna - Google Patents
Antenna Download PDFInfo
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- CN102904064A CN102904064A CN2012103754853A CN201210375485A CN102904064A CN 102904064 A CN102904064 A CN 102904064A CN 2012103754853 A CN2012103754853 A CN 2012103754853A CN 201210375485 A CN201210375485 A CN 201210375485A CN 102904064 A CN102904064 A CN 102904064A
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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 the microwave communication field, certain satellite S frequency range phased array antenna (being operated in the reception antenna of S frequency range) is the phased array antenna of 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, bay has been proposed the requirement of high-gain and miniaturization.The common method that is used for improving the antenna element gain is the antenna with radiating enclosures, for example increase horn structure in the microband paste radiation direction and improve gain, but such structural antenna efficient is lower, antenna pattern main lobe symmetry and roll-off relatively poorly, and antenna overall dimensions and mass ratio are larger.The shortcoming that present 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 is difficult for processing.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, the antenna of a kind of high-gain, miniaturization, simple in structure, easy processing is provided.
Above-mentioned purpose of the present invention is achieved by following technical solution:
A kind of antenna comprises micro-strip excitation device and cavity; The top diameter of cavity is larger than base diameter; Described cavity comprises a plurality of cone-shaped cavities that distribute successively from top to bottom, and the slope of a plurality of cone-shaped cavities that distribute from top to bottom becomes large gradually; Described micro-strip excitation device is positioned at cavity.
Described a plurality of cone-shaped cavity is 3.
The height of each cone-shaped cavity is equal to 1/4 operation wavelength.
Described micro-strip excitation device comprises upper strata parasitic patch, lower floor's radiation patch and dielectric support rod; Described dielectric support rod is suspended from upper strata parasitic patch and lower floor's radiation patch in the air.
Described upper strata parasitic patch and lower floor's radiation patch are circle.
Described dielectric support rod is four polyimides dielectric rods.
The bottom of described cavity is as the ground plate of micro-strip excitation device.
Described antenna also comprises the feed part, and described current feed department divides and comprises a plurality of coaxial feed probe, forms a plurality of through holes be used to holding described feed probes in the bottom of cavity, and described a plurality of coaxial feed probe contact with the lower floor radiation patch.
Described a plurality of coaxial feed probe is 4 square coaxial feed probe.
The present invention compared with prior art has following advantage:
1, by adopting multistage gradual change cone-shaped cavity structure, can effectively reduce cavity cross-section, make it to have cramped construction; Adopt this sudden change discontinuous construction, strengthened significantly concentrating of the interior local field strength of cavity, the backward radiation electromagnetic wave is reflected, and with the forward radiation ripple with superimposed, the final forward radiation that strengthens to greatest extent antenna, thereby make antenna obtain high-gain and good main lobe characteristic, antenna aperture efficient reaches 94.8%; The antenna structure compactness is convenient to the group battle array, can realize miniaturization and the lightweight of array;
2, antenna structure of the present invention has overcome the shortcomings of traditional corrugated horn and helical antenna, has advantages of that intensity is high, section is low, simple in structure, easily processing and easily installation, and electrical property is good, has realized high-gain and high efficiency.
Therefore 3, adopt this antenna to be convenient to realize miniaturization and the lightweight of aerial array as array element, in phased array antenna system, be with a wide range of applications in the especially high rail reconnaissance spacecraft reception antenna system.
Description of drawings
Fig. 1 is the multistage gradual change cone-shaped cavity of high-gain of the present invention antenna structure view;
Fig. 2 is the multistage gradual change cone-shaped cavity of high-gain of the present invention antenna structure profile;
Fig. 3 is micro-strip excitation device structural representation of the present invention;
Fig. 4 is multi-stage taper radiating enclosures structural representation of the present invention;
Fig. 5 is the square coaxial feed part-structure of the present invention 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 as antenna structure view of the present invention, be illustrated in figure 2 as antenna structure profile of the present invention, antenna of the present invention comprises micro-strip excitation device 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 excitation device 1 is positioned at cavity 2, and is installed in the bottom centre position of cavity 2; Give micro-strip excitation device 1 feed by feed part 3.Adopt multistage gradual change cone-shaped cavity can improve antenna efficiency and gain, reduce simultaneously the antenna section height.Antenna maximum caliber in the present embodiment is in 250mm～265mm scope, and antenna section height maximum is in 95mm～105mm scope.Require to determine the progression of cone-shaped cavity according to antenna gain requirement, antenna aperture and section height; Progression is fewer, and the antenna section height is lower, if but to reach 15dBi gain, then can so that antenna pattern main lobe symmetry and roll-off relatively poor, antenna aperture efficient step-down simultaneously; Progression is higher, antenna square chart main lobe symmetry and roll-off better, but the antenna section height is higher, is unfavorable for realizing miniaturization and the lightweight of antenna, progression too much also can cause the antenna aperture utilization ratio to reduce, simultaneously also because the increase of mutual coupling will be unfavorable for antenna array.The 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 and improve to greatest extent the antenna aperture efficiency goal according to antenna gain, strengthen concentrating of the interior local field strength of cavity, optimal design goes out every grade of cone-shaped cavity bottom surface and end face diameter.
As shown in Figure 3, micro-strip excitation device 1 is comprised 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 the same circumference, are used for upper strata parasitic patch 4, lower floor's radiation patch 5 are suspended from air.Dielectric support rod 6 one ends and upper strata parasitic patch 4 are fixing, and the other end passes lower floor's radiation patch 5 and contacts (as shown in Figure 2) with the bottom of cavity 2.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 mainly is Bandwidth, and lower floor's radiation patch 5 is mainly used in regulating gain.It is the diameter d 4=52mm of parasitic patch 4 at the middle and upper levels, with respect 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, with respect to the height h5=5.8mm of multistage gradual change cone of radiation cavity bottom, thickness m5=1mm.The micro-strip excitation device adopts double-decker, and parasitic patch and radiation patch adopt hanging structure, and supports with four polyimides dielectric rods, the effective broadening of employing said structure the antenna impedance bandwidth, and reduced loss.
Such as Fig. 2, shown in 4; Multistage gradual change cone-shaped cavity 2 is preferably three grades, formed by 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 diameters and second level cone-shaped cavity 8 bottom surface equal diameters, second level cone-shaped cavity 8 end face diameters and third level cone-shaped cavity 9 bottom surface equal diameters.It is large that the slope of three grades of cone-shaped cavities becomes successively.Multistage gradual change cone-shaped cavity 2 bottom surfaces are as ground plate, and 4 square openings 10 that are used for holding feed probes are set.Profile take cone-shaped cavity bottom surface line as datum line, is got the cone slope that tangent value is every grade of cavity to the angle between every grade of cavity bus and the datum line as shown in Figure 2.First order cone-shaped cavity 7 bottom surface diameter d 7=190mm wherein, the cone slope is k1=1.6, cone-shaped cavity 8 bottom surface diameters in the second level are d8=233.4mm, the cone slope is k2=3.8, third level cone-shaped cavity 9 bottom surface diameters are d9=251.8mm, and the 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 diameters are 1.86 operation wavelengths.The multistage gradual change cone-shaped cavity of high-gain antenna adopts 3 grades of Different Slope gradual change cone-shaped cavities, can make the interior local field strength of cavity significantly concentrated, when reaching 15dB i high-gain, improved to greatest extent antenna aperture efficient, the antenna pattern main lobe roll-offs near linearity, the whole section height of antenna is lower simultaneously, is convenient to realize miniaturization and the lightweight of antenna.
As shown in Figure 5, feed part 3 comprises a plurality of coaxial feed, described a plurality of coaxial feed is preferably 4 square coaxial feed, square coaxial feed is comprised of square coaxial feed probe 11 and square coaxial dielectric 12 and square coaxial outer conductor 13, and 4 square coaxial feed probe 11 are passed behind the through hole 10 of cavity 2 bottoms with lower floor radiation patch 5 and contacted.4 square coaxial feed probe 11 are distributed on the same circumference centered by the center of circle, bottom of cavity 2; Its amplitude is identical, and phase place differs 90 ° successively.11 pairs of lower floor's radiation patch of 4 square coaxial feed probe 5 that feed partly adopts phase place to differ successively 90 ° are carried out balanced feeding, can conveniently obtain the double-circle polarization performance, have significantly improved axial ratio bandwidth and circular polarization performance.
The operation principle of antenna of the present invention is as follows:
Antenna is comprised of micro-strip excitation device and multistage gradual change cone-shaped cavity, the micro-strip excitation device adopts double-decker, paster by up and down two different-diameters and height, unsettled placement forms, be used for broadening impedance bandwidth, and reduce the wastage, wherein lower floor's radiation patch is identical by 4 amplitudes, and phase place differs successively 90 ° square coaxial feed probe and carries out balanced feeding; Multistage gradual change cone-shaped cavity has adopted 3 grades of cavity body structures of gradual change of Different Slope, because the micro-strip excitation device is the electromagnetic wave of the single TE11 pattern of radiation only, suppressed the generation of higher mode, these sudden change discontinuous constructions have been strengthened again significantly concentrating of the interior local field strength of cavity simultaneously; By every grade of cone slope of complex optimum and cone height, make after the backward radiation reflection of electromagnetic wave with the forward radiation ripple with superimposed, until the major lobe of directional diagram is roll-offed near linearity when satisfying required high-gain, and radiating enclosures maximum caliber and section are minimized, and final design goes out to have the high-gain aerial of good electrical properties.
By above design, the electrical property of the multistage gradual change cone-shaped cavity of high-gain of the present invention antenna can reach:
Polarization mode: left-right-hand circular polarization;
Gain: 15.1dBi; Center of antenna frequency place maximum gain is 15.1dBi, and greater than 15dBi, major lobe of directional diagram symmetry is relatively good in 7.2% relative bandwidth, major lobe of directional diagram taper and roll-off comparatively fast, and antenna aperture efficient is 94.8%.
Standing wave:＜1.4 (in bandwidth ranges); This antenna can obtain the performance of VSWR＜1.4 in 14% relative bandwidth.
Axial ratio:＜1.2dB (in bandwidth range); Less than 1.2dB, circular polarization characteristics is good in ± 25 ° of beam areas.
Because the multistage gradual change cone-shaped cavity of high-gain of the present invention antenna has advantages of high-gain, high efficiency, low section, antenna pattern main lobe symmetry and roll-offs, therefore can form 32 yuan of thinned arraies by the multistage gradual change cone-shaped cavity of high-gain of the present invention antenna, at the diameter of antenna array less than 2m, gain is greater than 28.1dBi in ° situation of scanning angle ± 13, and the array Sidelobe Suppression is to less than-16dB.
The above; only be the embodiment of the best of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
The content that is not described in detail in the specification of the present invention belongs to this area professional and technical personnel's known technology.
Claims (9)
1. an antenna comprises micro-strip excitation device (1) and cavity (2); Cavity (2) top diameter larger than base diameter; It is characterized in that: described cavity (2) comprises a plurality of cone-shaped cavities that distribute successively from top to bottom, and the slope of a plurality of cone-shaped cavities that distribute from top to bottom becomes large gradually; Described micro-strip excitation device is positioned at cavity (2).
2. multistage gradual change cone-shaped cavity antenna according to claim 1, it is characterized in that: described a plurality of cone-shaped cavities are 3.
3. multistage gradual change cone-shaped cavity antenna according to claim 1 and 2, it is characterized in that: the height of each cone-shaped cavity is equal to 1/4 operation wavelength.
4. antenna according to claim 1 is characterized in that: described micro-strip excitation device (1) comprises upper strata parasitic patch (4), lower floor's radiation patch (5) and dielectric support rod (6); Described dielectric support rod (6) is suspended from upper strata parasitic patch (4) and lower floor's radiation patch (5) in the air.
5. antenna according to claim 4, it is characterized in that: described upper strata parasitic patch (4) and lower floor's radiation patch (5) are circle.
6. it is characterized in that according to claim 4 or 5 described antennas: described dielectric support rod (6) is four polyimides dielectric rods (6).
7. according to claim 1 or 4 described antennas, it is characterized in that: the bottom of described cavity (2) is as the ground plate of micro-strip excitation device (1).
8. multistage gradual change cone-shaped cavity antenna according to claim 7, it is characterized in that: described antenna also comprises feed part (3), described feed part (3) comprises a plurality of coaxial feed probe, form a plurality of through holes be used to holding described feed probes in the bottom of cavity (2), described a plurality of coaxial feed probe contact with lower floor's radiation patch (5).
9. multistage gradual change cone-shaped cavity antenna according to claim 8, it is characterized in that: described a plurality of coaxial feed probe are 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210375485.3A CN102904064B (en) | 2012-09-29 | 2012-09-29 | Antenna |
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| CN102904064A true CN102904064A (en) | 2013-01-30 |
| CN102904064B 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181050A (en) * | 2017-04-06 | 2017-09-19 | 上海交通大学 | The high-gain circular polarised array antenna of bowl-type 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 |
| CN111740214A (en) * | 2020-06-20 | 2020-10-02 | 北京华龙通科技有限公司 | Measuring antenna adopting wave dish-shaped director |
| CN113644447A (en) * | 2020-05-11 | 2021-11-12 | 诺基亚通信公司 | Antenna device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170220A (en) * | 2007-10-30 | 2008-04-30 | 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 |
-
2012
- 2012-09-29 CN CN201210375485.3A patent/CN102904064B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170220A (en) * | 2007-10-30 | 2008-04-30 | 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181050A (en) * | 2017-04-06 | 2017-09-19 | 上海交通大学 | The high-gain circular polarised array antenna of bowl-type 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 |
| CN113644447A (en) * | 2020-05-11 | 2021-11-12 | 诺基亚通信公司 | Antenna device |
| CN111740214A (en) * | 2020-06-20 | 2020-10-02 | 北京华龙通科技有限公司 | Measuring antenna adopting wave dish-shaped director |
| 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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| CN102904064B (en) | 2015-02-11 |
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