CN102629709A - Double-frequency broadband multifunctional miniaturization feed source - Google Patents
Double-frequency broadband multifunctional miniaturization feed source Download PDFInfo
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- CN102629709A CN102629709A CN2012101171249A CN201210117124A CN102629709A CN 102629709 A CN102629709 A CN 102629709A CN 2012101171249 A CN2012101171249 A CN 2012101171249A CN 201210117124 A CN201210117124 A CN 201210117124A CN 102629709 A CN102629709 A CN 102629709A
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Abstract
The invention discloses a double-frequency broadband multifunctional miniaturization feed source, comprising a reflecting wall (1), a reflecting wall (2), an activation section (3), an offset horn (4), and a radiant section (5). The reflecting wall (1) and the reflecting wall (2) are gravity curves with different focal distances and different rotation angles. The double-frequency broadband multifunctional miniaturization feed source of the invention has the characteristics of strong anti-interference capability, a broad frequency band, small blocking for a double curvature reflector antenna, and small caused mismatch error.
Description
Technical field
The invention belongs to the Electromagnetic Fields & Magnetic Waves technical field, relate to a kind of radar electric system, particularly a kind of double-frequency broadband multifunctional small-size feed.
Background technology
Low latitude and hedgehopping target are difficult to survey and follow the tracks of, and are four one of threats greatly that radar faces.In existing radar system, it is very useful for the effective investigative range that improves radar that blind technology is mended in the low latitude.The antenna that this radar system adopted is generally operational in two frequency ranges, and the wave beam of each frequency range covers different pitching spatial domains.
Reflector antenna is as the good high-gain aerial of characteristic, and the application in radar system is very extensive.In order to increase low latitude and extreme low-altitude investigative range; The traditional radar system adopts two antennas to form an antenna system, and each antenna covers different spatial domains, but the complex structure of this antenna; Brought difficulty for the design of servo system, cost is also very high simultaneously.Along with being on the increase of radar function demand, double frequency tangent bend figuration reflector antenna, promptly cosecant-squared beam antenna has obtained using widely in this radar system; This antenna is made up of two parts zone; Part zone is a cosecant square shaped-beam at pitching face, is narrow beam at azimuth plane, and another part zone is at the sharp wave bundle of pitching face for covering low latitude angular domain; And be narrow beam, thereby realize the investigative range in full spatial domain at azimuth plane.
As the feed of tangent bend figuration reflector antenna, radiation characteristic will be got well, and volume is little, and structure is wanted firmly generally to adopt horn antenna as feed.In order to satisfy the irradiation requirement of tangent bend figuration reflector antenna zones of different; The antenna that the traditional radar system is adopted has two kinds of forms; A kind of form is formed an antenna system by two antennas, and each antenna covers different spatial domains, and its shortcoming is that antenna structure is complicated; Brought difficulty for the design of servo system, the cost of antenna also increases greatly simultaneously.Another kind of antenna form combines an antenna to form by two feeds, shines same tangent bend reflector antenna by two feeds and forms needed secondary wave beam.The shortcoming of this antenna is that the relative antenna ratio of the physical dimension of feed is bigger, blocks also greatly, and the phase center of feed is difficult to consistent with the focus of tangent bend figuration reflector antenna, causes the secondary pattern variation.
Summary of the invention
Deficiency to feed in the prior art; The present invention provides a kind of double-frequency broadband multifunctional small-size feed; Utilize the principle of horn-reflector antenna; The part of the symmetrical parabola reflecting wall of sectoral horn and one rotation is combined, to different electromagnetic reflection and the transmissison characteristics of polarizing, design a kind of double-frequency broadband multifunctional small-size feed that can realize two-band, orthogonal polarization, different radiation beam direction-pointing functions simultaneously based on geometric optical theory and the grid that polarize.Utilize the radiating aperture of same structure to produce different two radiation beam pointing to of different frequency range; At pitching face; The radiation beam of two frequency ranges has certain included angle; The zones of different of irradiation tangent bend figuration reflector antenna increases the coverage of the secondary wave beam of antenna in the pitching spatial domain, mends the requirement of blind technology to realize the radar system low-to-medium altitude.
Its technical scheme is:
A kind of double-frequency broadband multifunctional small-size feed comprises reflecting wall 1, reflecting wall 2, activation fragment 3, offset horn 4, radiant section 5; Reflecting wall 1 is a different focal with reflecting wall 2, the parabolic curve at different rotary angle.
Described reflecting wall 1 is parts of parabolic curve with reflecting wall 2, and the I wave band adopts metal parabolic wall as reflecting wall 1, and H band adopts the equivalent parabolic wall of polarization stake composition as reflecting wall 2.
Further preferred, described polarization stake is equidistant metallic conductor, and spacing is 1/9th operation wavelengths.
Described activation fragment 3 is the square wave guide of 31 * 31mm.
Long-armed 6 and galianconism 7 of described offset horn 4 are dissymmetrical structures.
Described radiant section 5, the I wave band is partly done a subtended angle at bore and is formed E face loudspeaker as radiating aperture, and H band adopts and is placed on equivalent radiating aperture of the inner polarization grid sheet of bore 8 formations.
Further, described polarization grid sheet 8 is the equally spaced metallic conductor of equal thickness, and spacing is 1/9th operation wavelengths.
Compared with prior art, beneficial effect of the present invention is:
(1) technical scheme of the present invention can satisfy the requirement that the two-band, orthogonal polarization, different beams of tangent bend figuration reflector antenna are pointed to simultaneously;
(2) double-frequency broadband multifunctional small-size feed of the present invention is easy to adjust the relativeness between feed phase center and tangent bend figuration reflector antenna focus, realizes the different performance of secondary wave beam;
(3) antijamming capability of the present invention is strong, bandwidth;
(4) feed is little to blocking of tangent bend figuration reflector antenna, and the mismatch error that causes is little.
Description of drawings
Fig. 1 is a schematic diagram of the present invention;
Fig. 2 is a double-frequency broadband multifunctional small-size feed structure elevation cross-sectional view of the present invention;
Fig. 3 is the geometry figure of double-frequency broadband multifunctional small-size feed bore of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done explanation in further detail.
Operation principle of the present invention is following: the present invention has used the operation principle of horn-reflector antenna; With reference to coordinate system shown in Figure 1; Parabolic focus places origin of coordinates O; Its focal axis is in-
direction; At this moment; When the ripple of ducting shines on the parabola; Form radiation beam through parabolic reflector, its wave beam greatest irradiation direction edge-
direction, phase center then is similar to the center at radiating aperture.If is that initial point is along counterclockwise and angle [alpha] of clockwise direction rotation and β with parabolical focal axis x with coordinate origin O; Form x ' oy ' and x " oy " coordinate; Corresponding parabola parameter is chosen in x ' oy ' and x " oy " coordinate system; Then under the constant situation of loudspeaker bore, its wave beam greatest irradiation direction then points to-
and-
direction.Utilize this principle, can change the beam position of feed.Pumping signal encourages feed by input port in addition, and for the pumping signal of difference polarization, different parabolic wall catoptric arrangements have produced the field distribution of feed different caliber, thereby obtain the radiation beam of the frequency range separately characteristic of demands of different.Specific embodiment of the present invention is following:
According to the requirement of antenna system to feed, the elevation cross-sectional view of double-frequency broadband multifunctional small-size feed is as shown in Figure 2.Because excitation port will adapt to two kinds of polarization of two frequency ranges; Consider the requirement of Feed Horn azimuth plane beamwidth; And be limited in main die worker to mode of operation and do, activation fragment 3 is selected the square wave guide of 31 * 31mm, and it directly links to each other with offset horn 4; The I band configuration is EBAC ' among the figure, and the H band structure is EBAC among the figure.
Article two, the polar coordinates formula of parabola reflecting wall is following:
H band
The I wave band
F in the formula
1And f
2Be two parabolical focal lengths, θ is point and the line of focus and the angle of X axle on the parabola, and α and β are two parabolical anglecs of rotation.
In the present embodiment according to secondary wave beam require us to get the focal length that satisfies index request, the θ angle and the different anglecs of rotation.The polarization stake is from C ' some beginning, and CC ' is the parabola of H band, the metal wall of two the shared CC ' of wave band formations in the practical application.The original position C of reflecting wall 2 confirms long-armed 6 and galianconism 7 of dissymmetrical structure offset horn.Reflecting wall 1 is confirmed the parabola reflecting wall of feed.
Fig. 3 is the geometry of feed radiating aperture, and the I wave band is an E face horn structure, and the width of bore is 47mm, and H band adopts and is placed in parallel in the equivalent radiating aperture of the inner polarization grid sheet of E face loudspeaker 8 formations, and the bore width is 31mm.Satisfied the requirement of antenna different frequency range azimuth plane directional diagram.
Adopt the aluminium alloy Welding Structure to satisfy the overall structure requirement of feed at last.
The above is merely the preferable embodiment of the present invention, and protection scope of the present invention is not limited thereto, and the loudspeaker size that can change parabolical focal length, initial angle, the anglec of rotation and radiant section realizes different frequency range, the function that different beams points to.Any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses, and the simple change of the technical scheme that obtains or equivalence replacement all fall in protection scope of the present invention with may be obvious that.
Claims (7)
1. a double-frequency broadband multifunctional small-size feed comprises reflecting wall (1), reflecting wall (2), activation fragment (3), offset horn (4), radiant section (5); It is characterized in that: reflecting wall (1) and reflecting wall (2) are different focal, the parabolic curve at different rotary angle.
2. double-frequency broadband multifunctional small-size feed according to claim 1; It is characterized in that: described reflecting wall (1) and reflecting wall (2) are the parts of parabolic curve; The I wave band adopts metal parabolic wall as reflecting wall (1), and H band adopts the equivalent parabolic wall of polarization stake composition as reflecting wall (2).
3. double-frequency broadband multifunctional small-size feed according to claim 2 is characterized in that: described polarization stake is equidistant metallic conductor, and spacing is 1/9th operation wavelengths.
4. double-frequency broadband multifunctional small-size feed according to claim 1 is characterized in that: described activation fragment (3) is the square wave guide of 31 * 31mm.
5. double-frequency broadband multifunctional small-size feed according to claim 1 is characterized in that: long-armed (6) and the galianconism (7) of described offset horn (4) are dissymmetrical structures.
6. double-frequency broadband multifunctional small-size feed according to claim 1; It is characterized in that: described radiant section (5); The I wave band is partly done a subtended angle at bore and is formed E face loudspeaker as radiating aperture, and H band adopts and is placed on the inner equivalent radiating aperture of polarization grid sheet (8) formation of bore.
7. double-frequency broadband multifunctional small-size feed according to claim 6 is characterized in that: described polarization grid sheet (8) is the equally spaced metallic conductor of equal thickness, and spacing is 1/9th operation wavelengths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101171249A CN102629709A (en) | 2012-04-20 | 2012-04-20 | Double-frequency broadband multifunctional miniaturization feed source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101171249A CN102629709A (en) | 2012-04-20 | 2012-04-20 | Double-frequency broadband multifunctional miniaturization feed source |
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| Publication Number | Publication Date |
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| CN102629709A true CN102629709A (en) | 2012-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101171249A Pending CN102629709A (en) | 2012-04-20 | 2012-04-20 | Double-frequency broadband multifunctional miniaturization feed source |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531909A (en) * | 2013-10-16 | 2014-01-22 | 北京理工大学 | Terahertz frequency-scanning H-plane sectoral horn antenna and preparation method thereof under bulk silicon MEMS (micro-electromechanical system) process |
| CN107404000A (en) * | 2017-07-14 | 2017-11-28 | 南京邮电大学 | A kind of sugared spade-type fan-shaped beam horizontal sweep antenna |
| CN112350073A (en) * | 2020-09-29 | 2021-02-09 | 北京理工大学 | Ultra-large-diameter reflecting antenna based on secondary mirror array |
| CN112952356A (en) * | 2020-12-24 | 2021-06-11 | 中国航空工业集团公司沈阳飞机设计研究所 | L-waveband broom-shaped antenna |
-
2012
- 2012-04-20 CN CN2012101171249A patent/CN102629709A/en active Pending
Non-Patent Citations (4)
| Title |
|---|
| SANDLER: "Paraboloidal Reflector Patterns for Off-Axis Feed", 《IRE TRANSACTIONS ON ANTENNAS AND PROPAGATION》 * |
| 田伟: "偏置喇叭抛物盒馈源", 《中国优秀硕士论文电子期刊网》 * |
| 郑会利等: "一种偏置喇叭抛物盒馈源的研究", 《西安电子科技大学学报》 * |
| 郑会利等: "一种新型的双波束指向馈源喇叭", 《电波科学学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531909A (en) * | 2013-10-16 | 2014-01-22 | 北京理工大学 | Terahertz frequency-scanning H-plane sectoral horn antenna and preparation method thereof under bulk silicon MEMS (micro-electromechanical system) process |
| CN107404000A (en) * | 2017-07-14 | 2017-11-28 | 南京邮电大学 | A kind of sugared spade-type fan-shaped beam horizontal sweep antenna |
| CN107404000B (en) * | 2017-07-14 | 2020-03-31 | 南京邮电大学 | Sugar shovel type fan-shaped wave beam horizontal scanning antenna |
| CN112350073A (en) * | 2020-09-29 | 2021-02-09 | 北京理工大学 | Ultra-large-diameter reflecting antenna based on secondary mirror array |
| CN112952356A (en) * | 2020-12-24 | 2021-06-11 | 中国航空工业集团公司沈阳飞机设计研究所 | L-waveband broom-shaped antenna |
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Application publication date: 20120808 |