CN108539436A - A kind of broadband reflection battle array deflation field device of the off-axis low-angle offset-fed of wide-angle - Google Patents
A kind of broadband reflection battle array deflation field device of the off-axis low-angle offset-fed of wide-angle Download PDFInfo
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- CN108539436A CN108539436A CN201810345900.8A CN201810345900A CN108539436A CN 108539436 A CN108539436 A CN 108539436A CN 201810345900 A CN201810345900 A CN 201810345900A CN 108539436 A CN108539436 A CN 108539436A
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- angle
- fed
- reflective array
- feed
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
Abstract
The invention discloses a kind of broadband reflection battle arrays of the off-axis low-angle offset-fed of wide-angle to tighten field device, which is mainly made of reflective array bore with feed.The reflective array that the present invention announces tightens field device, the dead zone plane-wave field that the spherical wave collimation that feed is sent out is emitted by front unit off axis for wide-angle, feed uses accurate paraxial structure to irradiate reflective array with local low-angle offset-fed, makes front remnants mirror image beams far from dead zone to promote plane wave mass.In design by alternative projection algorithm combination filed-close plane wave spectrum transmission technology it is rapid integrated go out best dead zone needed for reflective array bore phase excitation.The present invention is lower than the requirement of traditional reflecting surface to the machining accuracy of reflective array antenna, reflective array bore uses printing circuit structure, simple for process, light structure, and feed wide-band tuning is matched and realizes bore collimation, tighten being realized with a low cost for field system applied to broadband millimeter-wave/submillimeter wave.
Description
Technical field
The present invention relates to Compact Range technical field, more particularly to the broadband reflection battle array of a kind of off-axis low-angle offset-fed of wide-angle
Compact Range, it is high-quality to realize by the optimization layout designs to reflective array bore, offset-fed angle, dead zone position and feed placement
Broadband planar wave dead zone, main application in millimeter wave submillimeter wave precision measurement, antenna radiation pattern or target can be met
The far field plane wave demand of RCS tests.
Background technology
With millimeter wave submillimeter wave technology fast development, millimeter wave Sub-MM Wave Antenna test demand increasingly compel
It cuts.There is technology or the cost disadvantage for being difficult to bear in terms of millimeter wave test in traditional near field, outdoor far field.Compact Range skill
Art has irreplaceable important function in millimeter wave antenna measuring technology, however traditional reflective surface antenna is limited by machinery and adds
It is higher to be applied to submillimeter region more difficulty or manufacturing cost for the rigors of work precision.
Invention content
The present invention goal of the invention be：The difficulty for overcoming millimeter wave reflecting surface Compact Range processing technology, proposes a kind of reflection
Face bore is the broadband reflection battle array Compact Range of the off-axis low-angle offset-fed of wide-angle of plane, as traditional paraboloid Compact Range
Low cost substitutes solution, the use by using higher gain feed and square opening diameter big angle rotary, inhibits bore edge
Aggregation of the diffraction energy in dead zone is blocked, it is incident to compensate the caused feed of frequency variation by the position of resonance matching feed
Wave-front phase mismatch, using off-axis layout, the rotation of front bore, bore phase is comprehensive, edge diffraction inhibits and feed broadband
With irradiation etc. comprehensive designs strategy, build the broadband planar wave dead zone of high quality, be applied to millimeter wave submillimeter wave test.This
Invent the reflective array Compact Range proposed, requirement on machining accuracy than traditional reflective face order of magnitude lower, using printing circuit structure,
It is simple for process, be easily installed transport, manufacturing cost can be reduced, be suitable for meeting inexpensive high-volume testing requirement.
The present invention adopts the following technical scheme that reach foregoing invention purpose：A kind of off-axis low-angle offset-fed of wide-angle
Broadband reflection battle array tightens field device, is mainly made of feed and reflective array antenna, feed and dead zone are located at reflective array antenna axis
Homonymy, dead zone collimated beam of sound tilts outgoing in reflective array antenna mouth face off axis, and the paraxial offset-fed of feed low-angle irradiates reflective array
Bore makes the front mirror image beam of phase-modulation remnants with reversed separate dead zone, to promote dead zone plane wave mass.
A kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle tightens field device, tilts the plane wave of outgoing
Off-axis angle θ be 30~40 degree.
A kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle tightens field device, the accurate paraxial low-angle of feed
Local offset-fed irradiation, feed location are directed toward the side of dead zone setting in the project migration direction of reflective array plane by reflective array center
To about 0.1~0.2 times of focal length of offset distance.
A kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle tightens field device, reflective array square opening diameter layout
Around from axis big angle rotary, rotation angle range is 30~60 degree.
A kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle tightens field device, and the polarization in dead zone is depended on
In feed state and reflective array element characteristics.
The broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle a kind of tightens field device, and reflective array is by spheric wave front
It is corrected into the plane wave wavefront being emitted off axis, bore phase weighting will be emitted under the early fixed constraint of illumination amplitude, and by alternately
The quick transmission theory in projection algorithm combination plane wave angular spectrum near field optimizes the reflective array phase excitation obtained.
A kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle tightens field device, feed to reflective array antenna
Plane projection distance is set as focal length, and the ratio of focal length and reflective array antenna horizontal diagonal line is defined as burnt diameter ratio, recommends burnt diameter ratio
It is 1.5~2, focal length design is conducive to reduce the oblique illumination of front unit and inhibits mirror image beam diffusion.
A kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle tightens field device, feed and the reflective array
Horizontal diagonal line front on bore is opposite, to form accurate paraxial irradiation.
A kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle tightens field device, feed and the reflective array
The local bias of Vertical Diagonal line on bore is opposite, to form local low-angle offset-fed irradiation.
A kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle tightens field device, and it is wide that reflective array tightens field energy
Band work can change caused incident phase to compensate by adjusting the position of feed when bandwidth of operation is more than 5% by frequency
Mismatch.
The principle of the present invention is as follows：The present invention is based on reflective array layout and filed-close plane wave complex optimum technologies, by feed
The spherical wave sent out is emitted at off-axis in front bore in short distance collimation, and the accurate paraxial local offset-fed irradiation in the same direction of feed is anti-
Battle array is penetrated, makes the mirror reflection of front remnants mirror image beams reversely far from dead zone, to promote dead zone plane wave mass, meets antenna survey
The far field condition demand of examination or target RCS tests.
The phase provided needed for reflective array each unit group battle array arrangement mode, i.e. reflective array each unit, by alternative projection algorithm
In conjunction with the quick transmission method in plane wave angular spectrum near field, carries out Plane-Wave Synthesis and optimize to obtain.
The feed of reflective array is laid out, and using paraxial low-angle part offset-fed mode, is avoided feed from being irradiated on reflective array and is produced
Raw mirror reflection wave beam influences the quality in dead zone.
The wideband operation of reflective array Compact Range, since working frequency is from f0Change to f1, reflective array antenna is irradiated to by feed
Incident phase changed, by the f that Focussing is former focal length1/f0Times, you can improve the quality in dead zone.Wherein frequency increases
Added-time feed is needed far from bore, and dead zone wave beam off-axis angle reduces, vice versa.
The present invention compared with the existing technology the advantages of be：
The off-axis offset-fed broadband reflection battle array Compact Range of the present invention, can be as traditional parabolic as a kind of novel Compact Range
Face Compact Range low cost substitute solution, be applied to millimeter wave submillimeter wave test；Broadband reflection battle array proposed by the present invention
Compact Range, requirement on machining accuracy relative loose, using microstrip line printing technology, portable construction, making is simple, is easily installed, can
To reduce manufacturing cost and use cost, and carry out wide-band tuning can wideband operation, be suitble to build millimeter with inexpensive mass
Wave submillimeter wave wave band radiation and scattering test system.
Description of the drawings
Fig. 1 is the three dimensional structure diagram of the present invention；
Fig. 2 is the structural schematic diagram of the present invention；
Fig. 3 is the off-axis offset-fed reflective array Compact Range front rotation layout and cell schematics of the present invention；
Fig. 4 is the Plane-Wave Synthesis Signal Phase Design flow chart of the present invention；
Fig. 5 is the amplitude and phase result obtained using Plane-Wave Synthesis Signal Phase Design, wherein Fig. 5 (a) is amplitude knot
Fruit, Fig. 5 (b) are phase result；
Fig. 6 is that the feed wide-band tuning of off-axis offset-fed reflective array Compact Range is overlooked regarding schematic diagram；
Wherein, 1 is feed, and 2 be offset-fed distance, and 3 be focal length, and 4 be reflective array antenna, and 5 be off-axis exit direction angle, and 6 are
Dead zone, 7 be plane wave angular spectrum method, and 8 be aperture field, and 9 be dead zone near field, and 10 be feed location before frequency deviation movement, and 11 be frequency deviation
Mobile preceding dead zone position, 12 be feed location after frequency deviation movement, and 13 be dead zone position after frequency deviation movement.
Specific implementation mode
Below in conjunction with the accompanying drawings and the present invention is discussed in detail in specific implementation mode.
As shown in Figs. 1-2, which tightens field device and is made of feed 1 and reflective array antenna 4.
The projector distance of feed 1 to reflective array antenna 4 is set to focal length 3, pair for being sized to 1.8 times of reflective arrays of focal length 3
Diagonal length.
The offset-fed distance 2 of 1 part offset-fed reflective array antenna 4 of feed, accurate paraxial low-angle is set as 0.1 times of focal length 3.
Reflective array antenna 4 rotates 45 degree of bore layout using square, which effectively can make edge diffraction to plane
The influence in wave dead zone 6.
Reflective array antenna 4 is manufactured using PCB technology.
The off-axis exit direction angle in plane wave dead zone 5 is set as 35 degree.
Reflective array tighten the dead zone 6 of field device position be scheduled on feed 1 after, 2 times of reflective arrays apart from reflective array antenna 4
Catercorner length.
The phase arrangement mode of array element, i.e., the phase provided needed for reflective array each unit position, by alternating projection are provided
Algorithm combination plane wave angular spectrum method 7 carries out Plane-Wave Synthesis and optimizes to obtain.As shown in figure 3, by close to the one of optimization aim group
Aperture field 8 obtains dead zone near field using plane wave angular spectra theory by inverse Fourier transform to angular spectrum domain by Fourier transformation
9, the new aperture field after being optimized using the inverse operation of aforesaid operations is constrained dead zone near field 9.Such loop iteration
Obtain the target solution of the condition of satisfaction.
The working frequency of the wideband operation of off-axis offset-fed reflective array Compact Range, feed 1 is f0When, position is in 10 (i.e. frequency deviations
Feed location before mobile), preceding dead zone position 11 is moved in dead zone position in frequency deviation, since working frequency is from f0Change to f1, by feed
The incident phase for being irradiated to reflective array is changed, and feed location is moved to 12 from 10 (i.e. feed locations before frequency deviation movement)
The position of (i.e. feed location after frequency deviation movement), dead zone will be moved to 13 (i.e. frequencies from 11 (i.e. frequency deviation moves preceding dead zone position)
Dead zone position after offset is dynamic), this wide-band tuning matches irradiation technique, will improve broadband dead zone quality.
What the present invention did not elaborated partly belongs to techniques well known.
Claims (10)
1. a kind of broadband reflection battle array of off-axis low-angle offset-fed of wide-angle tightens field device, it is characterised in that：Device is mainly by presenting
Source (1) and reflective array antenna (4) form, and feed (1) and dead zone (6) are located at phase the same side of reflective array physical axis, and dead zone is put down
Surface wave beam tilts outgoing in reflective array antenna (4) mouth face, the paraxial low-angle offset-fed irradiation reflective array antenna (4) of feed (1) off axis
Mouthful face makes the front mirror image beam of phase-modulation remnants in heteropleural negative direction far from dead zone (6), to promote dead zone plane wave matter
Amount.
2. a kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle according to claim 1 tightens field device, special
Sign is：The off-axis angle θ of the plane wave for tilting outgoing is 30~40 degree.
3. a kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle according to claim 1 tightens field device, special
Sign is：The accurate paraxial low-angle part offset-fed irradiation of the feed, feed location the project migration direction of reflective array plane by
It is directed toward the direction of dead zone setting, about 0.1~0.2 times of focal length of offset distance in reflective array center.
4. a kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle according to claim 1 tightens field device, special
Sign is：Reflective array antenna (4) square opening diameter layout around from axis big angle rotary, rotation angle range is 30~60 degree.
5. an a kind of broadband reflection battle array deflation field device for the off-axis low-angle offset-fed of wide-angle according to claim 1,
It is characterized in that：The polarization in dead zone depends on feed state and reflective array element characteristics.
6. a kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle according to claim 1 tightens field device, special
Sign is：Spheric wave front is corrected into the plane wave wavefront being emitted off axis by reflective array antenna (4), in the fixed constraint of illumination amplitude
It is lower to be emitted bore phase weighting, and optimized by the quick transmission theory in alternative projection algorithm combination spectrum of plane waves near field obtain it is anti-
Penetrate a gust phase excitation.
7. a kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle according to claim 1 tightens field device, special
Sign is：The feed to reflective array antenna (4) plane projection distance is set as focal length, focal length and reflective array antenna horizontal diagonal
The ratio of line is defined as burnt diameter ratio, and it is 1.5~2 to recommend burnt diameter ratio, focal length design be conducive to reduce the oblique illumination of front unit and
Inhibit mirror image beam diffusion.
8. a kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle according to claim 1 tightens field device, special
Sign is：The feed is opposite with the horizontal diagonal line front on the reflective array antenna (4) bore, to form accurate paraxial photograph
It penetrates.
9. a kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle according to claim 1 tightens field device, special
Sign is：The feed is opposite with the local low-angle biasing of the Vertical Diagonal line on the reflective array antenna (4) bore, with shape
It is irradiated at local offset-fed.
10. a kind of broadband reflection battle array of the off-axis low-angle offset-fed of wide-angle according to claim 1 tightens field device, special
Sign is：The reflective array tightens field energy wideband operation, can be mended by adjusting the position of feed when bandwidth of operation is more than 5%
Repay the mismatch of incident phase caused by being changed by frequency.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810345900.8A CN108539436B (en) | 2018-04-18 | 2018-04-18 | Wide-angle off-axis small-angle offset-fed broadband reflection array compact field device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345900.8A CN108539436B (en) | 2018-04-18 | 2018-04-18 | Wide-angle off-axis small-angle offset-fed broadband reflection array compact field device |
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| CN108539436A true CN108539436A (en) | 2018-09-14 |
| CN108539436B CN108539436B (en) | 2020-10-02 |
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Cited By (2)
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| CN112034266A (en) * | 2020-05-25 | 2020-12-04 | 北京中测国宇科技有限公司 | Millimeter wave multi-feed source compact range testing system |
| CN112399792A (en) * | 2020-12-07 | 2021-02-23 | 北京航天长征飞行器研究所 | Multi-source electromagnetic wave beam crosstalk inhibition method and device and computer storage medium |
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| CN112399792A (en) * | 2020-12-07 | 2021-02-23 | 北京航天长征飞行器研究所 | Multi-source electromagnetic wave beam crosstalk inhibition method and device and computer storage medium |
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| CN108539436B (en) | 2020-10-02 |
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