CN201877576U - Curve array feed source bifocal parabolic reflecting plane space power synthetic antenna - Google Patents
Curve array feed source bifocal parabolic reflecting plane space power synthetic antenna Download PDFInfo
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- CN201877576U CN201877576U CN2010205858923U CN201020585892U CN201877576U CN 201877576 U CN201877576 U CN 201877576U CN 2010205858923 U CN2010205858923 U CN 2010205858923U CN 201020585892 U CN201020585892 U CN 201020585892U CN 201877576 U CN201877576 U CN 201877576U
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Abstract
The utility model provides a curve array feed source bifocal parabolic reflecting plane space power synthetic antenna which consists of a reflecting plane and a feed source array, wherein the reflecting plane of the antenna is a bifocal parabolic reflecting plane which is formed by the means that one parabola with shorter focal distance on a horizontal plane is along with another parabola with longer focal distance on a vertical plane; the feed source array is a parabolic curve feed source array which is formed by the means that a plurality of horn antennas are arranged on a parabola which is formed by the means that the parabola with longer focal distance is horizontally moved to the focal point of the parabola with shorter focal distance; the phase position of each horn antenna is set according to the Huygens-Huygen-fresnel principle; and each horn antenna achieves the maximum in-phase synthesis on the maximum radiation direction. The space power of the feed source array is synthesized to generate radiation to irradiate the bifocal parabolic reflecting plane, and electromagnetic wave is reflected by the bifocal parabolic reflecting plane to form a required wave beam to improve antenna gain. The antenna is simple in structure and high in gain.
Description
Technical field
The utility model relates to the spatial power synthesis technical field, a kind of specifically synthetic parabolic surface type reflector antenna of spatial power that is used for is a kind of reflector antenna technology that superposes and synthesize that the electromagnetic wave that is given off by trumpet array in the space is reflected.
Background technology
In radar, electronic countermeasures and telecommunication, need to obtain powerful directional electromagnetic radiation wave beam.When the individual signals source can not produce enough power, need the synthetic method of employing power, the signal of multichannel lower-wattage is synthesized needed high-power radiation, method has two kinds: the one, adopt power synthetic technique based on circuit or waveguide, utilizing multiple signals the comprise network of circuit or waveguide to carry out power synthesizes, go out by aerial radiation again, but there is loss in comprise network itself, has reduced the synthetic efficient of power; Two are based on the free-space power synthetic technology, by adopting the spatial power synthetic antenna, the multichannel power signal directly is radiated free space by antenna element, by controlling the phase place of each path radiation, the great-power electromagnetic wave beam that directly synthesizes directed radiation at free space, because do not had the loss of comprise network, combined coefficient is higher.
The leading indicator of spatial power synthetic antenna is equivalent isotropically radiated power ERIP, and in order to improve ERIP, except increasing the synthetic power amplifier way of power, the effective way of another one is the gain that increases antenna.Improve the gain of antenna, just must improve the bore of antenna.In microwave band, it is synthetic that the spatial power synthetic antenna can adopt the linear array of the constant amplitude homophase feed of being made up of a plurality of horn antennas to carry out spatial power, increases the gain of the bore of antenna with the raising antenna as reflecting surface with parabolic cylinder.Be placed on the horn antenna array radiates on the parabolic cylinder focal line electromagnetic wave and synthesize high-power sharp-pointed wave beam in the space through parabolic cylinder reflection back.In order further to improve the gain of antenna, just must further improve the length of parabolic cylinder.Yet parabolic-cylinder antenna requires the length of feed array identical with the length of parabolic cylinder, otherwise the gain that can't improve antenna because parabolic cylinder can not get irradiation fully.The length that increases the feed array needs more loudspeaker unit or bigger array element spacing.More loudspeaker unit means more power amplifier way, and this can increase substantially the cost of system; If the increase array element distance is by the aerial array theory, when array element distance during greater than 1 wavelength, graing lobe can appear in antenna pattern, makes power in unwanted direction radiation, and this wastes energy on the one hand, reduce the power combined coefficient, can produce unnecessary interference on the other hand.Because the restriction of this factor, prior art can't obtain the high-power radiation of high-gain, narrow beam.In order to address this problem,, just must improve the design of reflecting surface and feed array for linear array spatial power synthetic antenna.
The utility model content
The purpose of this utility model is to overcome the shortcoming of prior art, a kind of novel reflecting surface spatial power synthetic antenna is provided, the reflecting surface of this antenna is a bifocal parabolic reflector that forms along the longer parabola of another focal length on the vertical plane at the short parabola of focal length on the horizontal plane with, the feed array is a plurality of horn antennas to be arranged in moved to by above-mentioned long focal parabola that institute forms parabolic curve feed array on the parabola that the focus place of above-mentioned short focal parabola forms, the phase place of each horn antenna is according to Huygens---and the Fei Nieer principle is provided with, and each horn antenna reaches maximum same being combined on the greatest irradiation direction.It is synthetic that the feed array carries out spatial power, the radiation irradiation bifocal parabolic reflector of generation, and the wave beam that the formation of bifocal parabolic reflector reflection electromagnetic wave needs is to improve antenna gain.
Be the technical scheme that realizes that the purpose of this utility model adopts: a kind of curve pattern feed bifocal parabolic reflector spatial power synthetic antenna, it is characterized in that, form by reflecting surface and feed array; Described reflecting surface is that the summit that will be positioned at first parabolic curve on x-y plane (horizontal plane) is placed on second parabolic curve that is positioned at y-z plane (vertical plane), under the state vertical of the plane that keeps the first parabolic curve place with second parabolic curve, scan the bifocal parabolic surface that forms along second parabolic curve by first parabolic curve, wherein, the focal length F1 of the focal length F2 of first parabolic curve＜second parabolic curve; Described feed array is meant the horn antenna of arranging by the 3rd parabolic curve, and described the 3rd parabolic curve is second parabolic curve moves to first parabolic curve at the axis of upper edge, y-z plane second parabolic curve the formed parabolic curve of focus; Its phase center was on the 3rd parabolic curve when described horn antenna was arranged, and the sensing of all horn antennas is parallel, and direction is in the centre of the subtended angle of first parabolic curve; The current feed phase φ of described each horn antenna disposes according to following formula:
In the formula: φ is the current feed phase of horn antenna, and λ is an electromagnetic wavelength, and l is the distance of the phase center of horn antenna to the focus of second parabolic curve.
Described reflecting surface is meant the reflecting surface that employing has the materials such as copper, aluminium or iron of good reflection to make to electromagnetic wave.
The described second parabolic curve focal length F1 should guarantee that described feed array equals the subtended angle of second parabolic curve to this focus to the subtended angle of the focus of second parabolic curve; Choosing of the focal length F2 of first parabolic curve should guarantee that first parabolic curve equals the 10db width of described horn antenna directional pattern main lobe on the x-y plane to the subtended angle of its focus.
From patent documentation, there is not to find to be used for the related data of the synthetic parabolic surface type reflector antenna of spatial power, the utility model with respect to the advantage and the effect of prior art is:
1, compare with parabolic cylinder type reflecting surface spatial power synthetic antenna, the utility model is independently controlled synthetic performance of spatial power and radiation beam performance.
2, under the loudspeaker way situation identical with the feed unit, the utility model is compared with parabolic cylinder type reflecting surface spatial power synthetic antenna has higher actinal surface utilization ratio.
3, under the loudspeaker way situation identical with the feed unit, the utility model and the higher gain of specific energy acquisition mutually of parabolic cylinder type reflecting surface spatial power synthetic antenna.
4, antenna of the present utility model can reduce minor level, avoids Power leakage, improves the synthetic efficient of power.
Description of drawings
Fig. 1 is the structural representation of curve pattern feed bifocal parabolic reflector spatial power synthetic antenna of the present utility model;
Wherein, 1 is horn antenna, and 2 is the feed array of being made up of horn antenna, and 3 is the bifocal reflecting surface.
Fig. 2 a is the reflecting surface on the Y-Z plane (vertical plane) and the formation schematic diagram of feed array;
Fig. 2 b is the formation schematic diagram of first parabolic curve on the X-Y plane;
Wherein 4 is second parabolic curve, and F1 is its focal length, and H1 is its projected length, the 8th, and its focus; 5 is first parabolic curves, and F2 is its focal length, and H2 is its standoff height, the 6th, and its focus, Ψ is its subtended angle, Ψ
0It is its original position (with respect to its axis); Ψ
mIt is the orientation angle (with respect to the axis of first parabolic curve) of horn antenna; 7 is the 3rd parabolic curves, and d is its distance to second parabolic curve.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Embodiment
Curve pattern feed bifocal parabolic reflector spatial power synthetic antenna structure of the present utility model as shown in Figure 1, parabolic curve feed array 2 and bifocal parabolic surface type reflector antenna 3 that the entire antenna system is made up of horn antenna 1 constitute.Reflecting surface is by the material that electromagnetic wave is had good reflection (as copper, aluminium, iron etc.)
The formation method of bifocal parabolic surface type reflecting surface is shown in Fig. 2 a, and first parabolic curve 5 on the horizontal plane (x-y plane) forms bifocal parabolic surface 3 along second parabolic curve, 4 scannings on the vertical plane (y-z plane).Wherein, the focal length F1 of the focal length F2 of first parabolic curve 5＜second parabolic curve 4, the summit of first parabolic curve 5 is on second parabolic curve 4 during scanning, and the plane at first parabolic curve, 5 places keeps vertical with second parabolic curve 4.The second parabolic curve focal length F1 should guarantee that described feed array equals the subtended angle of second parabolic curve to this focus to the subtended angle of the focus of second parabolic curve; Choosing of the focal length F2 of first parabolic curve should guarantee that first parabolic curve equals the 10db width of described horn antenna directional pattern main lobe on the x-y plane to the subtended angle of its focus.
Horn antenna 1 is arranged by the 3rd parabolic curve 7, that to be second parabolic curves 4 move to the focus 6 of first parabolic curve 5 at the axis of vertical plane upper edge second parabolic curve 4 to the 3rd parabolic curve 7 is formed, the phase center of horn antenna 1 is placed on the 3rd parabolic curve 7 during arrangement, and horn antenna 1 points to parallel and points to the centre of the subtended angle of first parabolic curve 5.
The electromagnetic wave that the current feed phase of each horn antenna 1 equals to be positioned at the point source institute radiation on the focus 8 of second parabolic curve 4 passes to the phase place of position of the phase center of horn antenna 1, promptly according to
Formula configuration, wherein φ is the current feed phase of horn antenna 1, λ is an electromagnetic wavelength, l is the distance of the phase center of horn antenna 1 to the focus 8 of second parabolic curve 4.The length of the feed array 2 that horn antenna 1 is formed should make its subtended angle to the focus 8 of second parabolic curve 4 equal the subtended angle of parabola 4 to its focus 8.
The design principle of antenna of the present utility model is: the electromagnetic wave that radiates from each horn antenna carries out power in the space synthetic, is radiated on the bifocal parabolic surface.At vertical plane (y-z face), when phase place is provided with according to the method described above, according to Huygens---the Fei Nieer principle, it is identical with the electromagnetic wave of the point source radiation that is positioned at the parabola focus to be radiated at the synthetic electromagnetic wave of reflecting surface, after parabolic reflector, can form plane wave, shown in Fig. 2 a; At horizontal plane, the feed array is positioned at the focus of first parabolic curve 5, forms plane wave after parabolic reflector.Therefore, adopt design of the present utility model, the synthetic electromagnetic wave of parabolic linear array can form sharp-pointed wave beam through behind the reflecting surface.Owing to increase the bore of bifocal parabolic reflector under the situation that can remain unchanged in the way of power integrated array, the therefore gain that can increase the power synthetic antenna improves the equivalent isotropically radiated power ERIP of system.
The parameter that adopts in this example is: operating frequency is 12.5GHz, the second parabolic curve F1=86cm, standoff height H1=68.95cm; The first parabola focal length F2=31.228cm, the H2=72.12cm of projection width, subtended angle are Ψ=55 °, Ψ
0=5 °, Ψ
m=32.5 °; The feed array equals 19.050mm by 16 width, and the E face horn antenna that highly equals 42mm is formed.Result of calculation shows, its gain is 32.45dB, and with same projected area, form the gain that the parabolic cylinder spatial power synthetic antenna of 16 unit linear arrays irradiations compares with same E face loudspeaker and improved 1.45dB, thereby the raising of ERIP value has also improved 1.45dB.
The foregoing description is the utility model preferred implementation; but execution mode of the present utility model is not restricted to the described embodiments; anyly do not deviate from the change done under spirit of the present utility model and the principle, modification, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within the protection range of the present utility model.
Claims (3)
1. a curve pattern feed bifocal parabolic reflector spatial power synthetic antenna is characterized in that, is made up of reflecting surface and feed array; Described reflecting surface is that the summit that will be positioned at first parabolic curve on x-y plane is placed on second parabolic curve that is positioned at the y-z plane, under the state vertical of the plane that keeps the first parabolic curve place with second parabolic curve, scan the bifocal parabolic surface that forms along second parabolic curve by first parabolic curve, wherein, the focal length F2 of the focal length F1 of first parabolic curve＜second parabolic curve; Described feed array is meant the horn antenna of arranging by the 3rd parabolic curve, and described the 3rd parabolic curve is second parabolic curve moves to first parabolic curve at the axis of upper edge, y-z plane second parabolic curve the formed parabolic curve of focus; Its phase center was on the 3rd parabolic curve when described horn antenna was arranged, and the sensing of all horn antennas is parallel, and direction is in the centre of the subtended angle of first parabolic curve; The current feed phase φ of described each horn antenna disposes according to following formula:
In the formula: φ is the current feed phase of horn antenna, and λ is an electromagnetic wavelength, and l is the distance of the phase center of horn antenna to the focus of second parabolic curve.
2. curve pattern feed bifocal parabolic reflector spatial power synthetic antenna according to claim 1 is characterized in that described reflecting surface is meant the reflecting surface that employing has copper, aluminium or the iron of good reflection to make to electromagnetic wave.
3. curve pattern feed bifocal parabolic reflector spatial power synthetic antenna according to claim 1, it is characterized in that choosing of the described second parabolic curve focal length F1 should guarantee that described feed array equals the subtended angle of second parabolic curve to this focus to the subtended angle of the focus of second parabolic curve; Choosing of the focal length F2 of first parabolic curve should guarantee that first parabolic curve equals the 10db width of described horn antenna directional pattern main lobe on the x-y plane to the subtended angle of its focus.
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|---|---|---|---|
| CN2010205858923U CN201877576U (en) | 2010-10-28 | 2010-10-28 | Curve array feed source bifocal parabolic reflecting plane space power synthetic antenna |
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| CN2010205858923U CN201877576U (en) | 2010-10-28 | 2010-10-28 | Curve array feed source bifocal parabolic reflecting plane space power synthetic antenna |
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| CN201877576U true CN201877576U (en) | 2011-06-22 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104200A (en) * | 2010-10-28 | 2011-06-22 | 华南理工大学 | Space power synthetic antenna of curve array feed source bifocal parabolic reflecting surface |
| CN103066397A (en) * | 2012-11-30 | 2013-04-24 | 北京遥测技术研究所 | Wide-angle scanning bell-shaped double-refracting-surface lens antenna |
| CN103078162A (en) * | 2013-01-11 | 2013-05-01 | 东南大学 | MMW (millimeter waves) terahertz quasi optical beam power synthesis network |
| CN110649397A (en) * | 2019-09-27 | 2020-01-03 | 中国电子科技集团公司第三十八研究所 | Reconfigurable planar reflective array antenna of integrated reflective array |
| CN112307588A (en) * | 2020-11-10 | 2021-02-02 | 西安工程大学 | Non-uniform parabolic array antenna design method |
-
2010
- 2010-10-28 CN CN2010205858923U patent/CN201877576U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104200A (en) * | 2010-10-28 | 2011-06-22 | 华南理工大学 | Space power synthetic antenna of curve array feed source bifocal parabolic reflecting surface |
| CN102104200B (en) * | 2010-10-28 | 2013-09-25 | 华南理工大学 | Space power synthetic antenna of curve array feed source bifocal parabolic reflecting surface |
| CN103066397A (en) * | 2012-11-30 | 2013-04-24 | 北京遥测技术研究所 | Wide-angle scanning bell-shaped double-refracting-surface lens antenna |
| CN103066397B (en) * | 2012-11-30 | 2015-05-27 | 北京遥测技术研究所 | Wide-angle scanning bell-shaped double-refracting-surface lens antenna |
| CN103078162A (en) * | 2013-01-11 | 2013-05-01 | 东南大学 | MMW (millimeter waves) terahertz quasi optical beam power synthesis network |
| CN110649397A (en) * | 2019-09-27 | 2020-01-03 | 中国电子科技集团公司第三十八研究所 | Reconfigurable planar reflective array antenna of integrated reflective array |
| CN110649397B (en) * | 2019-09-27 | 2021-05-18 | 中国电子科技集团公司第三十八研究所 | Reconfigurable planar reflective array antenna of integrated reflective array |
| CN112307588A (en) * | 2020-11-10 | 2021-02-02 | 西安工程大学 | Non-uniform parabolic array antenna design method |
| CN112307588B (en) * | 2020-11-10 | 2024-02-06 | 西安工程大学 | Non-uniform parabolic array antenna design method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20131028 |