CN106207488A - A kind of antenna array design method of one-dimensional interference type micro-wave radiometer - Google Patents
A kind of antenna array design method of one-dimensional interference type micro-wave radiometer Download PDFInfo
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- CN106207488A CN106207488A CN201610518499.4A CN201610518499A CN106207488A CN 106207488 A CN106207488 A CN 106207488A CN 201610518499 A CN201610518499 A CN 201610518499A CN 106207488 A CN106207488 A CN 106207488A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0087—Apparatus or processes specially adapted for manufacturing antenna arrays
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Abstract
The present invention relates to a kind of antenna array design method of one-dimensional interference type micro-wave radiometer, including: after determining the Long baselines of aerial array to be designed, calculate the minimal redundancy aerial array of this Long baselines, this minimal redundancy aerial array obtain newly adding antenna element arrangement after one or more groups adds new antenna element；The described baseline redundancy newly adding antenna element arrangement is judged, if the redundancy of remaining baseline in addition to Long baselines is all higher than 1, the most described newly add that antenna element arrangement is preliminary meets design requirement, the most further to newly add antenna element arrangement in redundancy be 2 baseline be analyzed, if two redundancy baseline is made up of four separate units, then think described newly add antenna element arrangement meet final design demand, be aerial array to be designed.
Description
Technical field
The present invention relates to one-dimensional synthetic aperture radiometer field, particularly to the sky of a kind of one-dimensional interference type micro-wave radiometer
Linear array method for designing.
Background technology
Type micro-wave radiometer measurement principle is interfered to be different from traditional true aperture microwave radiometry.Interfere the amplitude that declines
Penetrating meter first to measure object space frequency spectrum, then by Fourier transform, inverting obtains the bright temperature information of target.
The frequency domain continuous sampling interfering type micro-wave radiometer is that the sparse antenna array utilizing appropriate design realizes.Pass
The one-dimensional interference type micro-wave radiometer of system, according to system complexity and the consideration of cost, usually requires that and utilizes minimum number of unit real
Long baselines covers, i.e. minimal redundancy aerial array.Gu Yihui et al. (Gu Yihui, comprehensive hole based on simulated annealing
Footpath thinned array design, Master's thesis, 2010) use simulated annealing to achieve setting of minimal redundancy aerial array arrangement
Meter.
But, in some special applications, such as based on spaceborne one-dimensional synthetic aperture radiometer, its be more concerned be
The reliability of system.According to traditional minimal redundancy aerial array, when any antenna-channel unit lost efficacy, measurement all can be caused
The disappearance of baseline, thus cause the decline of system detection performance.So, in spaceborne application, minimal redundancy antenna array scheme
The demand of reliability cannot be met.
Summary of the invention
It is an object of the invention to overcome existing minimal redundancy antenna array scheme cannot meet lacking of reliability requirement
Fall into, thus a kind of antenna array design method of one-dimensional interference type micro-wave radiometer with higher reliability is provided.
To achieve these goals, the invention provides the antenna array design side of a kind of one-dimensional interference type micro-wave radiometer
Method, including:
After determining the Long baselines of aerial array to be designed, calculate the minimal redundancy antenna array of this Long baselines
Row, are obtained the antenna element that newly adds after one or more groups adds new antenna element by this minimal redundancy aerial array and arrange；To institute
State and newly add the baseline redundancy of antenna element arrangement and judge, if the redundancy of remaining baseline in addition to Long baselines is all higher than
1, the most described newly add that antenna element arrangement is preliminary meets design requirement, the most further to newly adding redundancy in antenna element arrangement
Be 2 baseline be analyzed, if two redundancy baselines are made up of four separate units, then it is assumed that described newly add antenna element arrangement
Meet final design demand, be aerial array to be designed.
In technique scheme, the method specifically includes following steps:
Step 101), determine the Long baselines u of aerial arraymax=Numin；Wherein, umaxIt is Long baselines, uminIt is the shortest
Baseline, N is baseline amount；
Step 102), to utilize simulated annealing to be calculated Long baselines be NuminMinimal redundancy aerial array
Ant1；
Step 103), according to step 102) arrangement Ant of minimum redundant array that obtains1, it is calculated minimum superfluous
The normalization aerial position of remaining aerial array is Antnr, vacant aerial position is Antem, vacant aerial position number is Nem；
Step 104), assume nadd=1,2...n is the antenna element being newly added for meeting aerial array redundancy demand
Number, then for each nadd, it is newly added option A nt of antennaaddHaveIndividual；
Step 105) from nadd=1 starts, and the scheme that each newly adds antenna element carries out exhaustive search, and obtains one
Individual new antenna element arrangement: Antnew=[Antnr∪Antadd]；
Step 106) to step 105) obtained by the baseline redundancy of new antenna element arrangement judge, if except
Outside Long baselines l=N, the redundancy of other baselinesIt is all higher than 1, then it was initially believed that this aerial array meets design requirement, perform
Next step, otherwise, re-execute step 105)；
Step 107), assert that the aerial array meeting design requirement is further analyzed to preliminary, including: continue redundancy
Degree be 2 baseline be analyzed, it is assumed that constitute two redundancy baselines unit be respectively [a1, a2] and [a3, a4], if four changes
Measure the most unequal, then it is assumed that aerial array meets design requirement；If four variablees existing equal two variable, then it is assumed that sky
Linear array is unsatisfactory for demand, re-executes step 105), until obtaining meeting the aerial array that design requires.
It is an advantage of the current invention that: realize high reliability one-dimensional interference type micro-wave radiometer with minimum antenna element quantity
Antenna array design, i.e. disappearance any cell in the case of, still can ensure systemic-function (observation base does not lacks).
Accompanying drawing explanation
Fig. 1 is the flow chart of the antenna array design method of the one-dimensional interference type micro-wave radiometer of the present invention；
Fig. 2 is to utilize the aerial array row in the case of the calculated minimal redundancy of simulated annealing in one example
Cloth schematic diagram；
Fig. 3 is the schematic diagram of the minimal redundancy aerial array baseline redundancy situation corresponding to example shown in Fig. 2；
Fig. 4 is the schematic diagram of the antenna array design result obtained by employing the inventive method；
Fig. 5 is the schematic diagram of the redundancy situation of baseline.
Detailed description of the invention
In conjunction with accompanying drawing, the invention will be further described.
In one embodiment, the redundant antenna array design methodology of the present invention is applied to the ocean salt of spaceborne L-band
In degree measurement system, it will be appreciated that those skilled in the art that the redundant antenna array design methodology of the present invention is also applied for it
The one-dimensional interference type micro-wave radiometer measurement system of all band.
As it is shown in figure 1, the redundant antenna array design methodology of the present invention can be specifically described as:
Step 101), determine the Long baselines u of aerial arraymax=Numin；Wherein, umaxIt is Long baselines, uminIt is the shortest
Baseline, N is baseline amount.
Step 102), to utilize simulated annealing to be calculated Long baselines be NuminMinimal redundancy aerial array
Ant1；Wherein, described simulated annealing is prior art, turns round and look at the paper of benefit brightness as mentioned in the background art " based on simulation
The aperture synthesis thinned array design of annealing algorithm " just realization to simulated annealing describe.
Step 103), according to step 102) arrangement Ant of minimum redundant array that obtains1, it is calculated minimum superfluous
The normalization aerial position of remaining aerial array is Antnr, vacant aerial position is Antem, vacant aerial position number is Nem；Wherein,
Described normalization aerial position refers to aerial position by antenna distance normalization minimum in aerial array, such as between three antennas
Away from being followed successively by 0.5m, 2m, then normalization aerial position is [126].The position calculation of normalization antenna is prior art, the most not
Repeat herein.
Step 104), assume nadd=1,2...n is the antenna element being newly added for meeting aerial array redundancy demand
Number, then for each nadd, it is newly added option A nt of antennaaddHaveIndividual；
Step 105) from nadd=1 starts, and the scheme that each newly adds antenna element carries out exhaustive search, and obtains one
Individual new antenna element arrangement: Antnew=[Antnr∪Antadd]；
Step 106) to step 105) obtained by the baseline redundancy of new antenna element arrangement judge, if except
Outside Long baselines l=N, the redundancy of other baselinesIt is all higher than 1, then it was initially believed that this aerial array meets design requirement, perform
Next step, otherwise, re-execute step 105)；
Step 107), assert that the aerial array meeting design requirement is further analyzed to preliminary, including: continue redundancy
Degree be 2 baseline be analyzed, it is assumed that constitute two redundancy baselines unit be respectively [a1, a2] and [a3, a4], if four changes
Measure the most unequal, then it is assumed that aerial array meets design requirement；If four variablees existing equal two variable, then it is assumed that sky
Linear array is unsatisfactory for demand, re-executes step 105), until obtaining meeting the aerial array that design requires.
Use the aerial array designed by method of the present invention, lack any one antenna element, all will not cause measurement
The disappearance of baseline, so more existing method for designing reliability is higher.
In an embodiment, antenna form is parabolic cylindricality reflector antenna, and antenna Long baselines is designed as u=
30du, wherein du=0.6125 λ is the shortest baseline.In the case of Fig. 2 is for utilizing the calculated minimal redundancy of simulated annealing
Aerial array arrangement, antenna element number is N=10, and the normalization position of antenna element is Antnr=[0,2,4,5,13,14,
23,24,29,30], aerial array spare bits is set to Antem=[1,3,6,7,8,9,10,11,12,15,16,17,18,19,20,
21,22,25,26,27,28], vacant positional number Nem=21.Fig. 3 is minimal redundancy aerial array baseline redundancy situation, permissible
See that the redundancy of baseline cannot meet the demand of system reliability.The method of the present invention is the antenna in the case of minimal redundancy
On the basis of array arrangement, add new antenna element, design requirement can be reached to new aerial array redundancy.The present invention
Method from nadd=1 proceeds by exhaustive, can be calculated naddWhen=1, antenna array scheme hasKind, nadd
When=2, antenna array scheme hasTime, antenna array scheme hasKind.Then in often group
When becoming a new aerial array, in real time the redundancy of aerial array is differentiated, when occurring that a new aerial array makes
The redundancy of each baseline be both greater than 1 (except Long baselines) time, then to the baseline that redundancy is 2 to examining further
Look into.In designing at one, the result of program output is total feed number 13, and each baseline redundancy is all higher than 1 (except the longest base
Line), but check and find that the baseline aerial position that one of them redundancy is 2 is respectively as follows: [3 6]；[6 10], if in the case of this
6 unit damage, and can cause this Baseline absence, be unsatisfactory for design requirement.Continue search for the array of redundancy both greater than 1 and carry out
Checking (redundancy is the baseline of 2), final output meets the antenna array design result of design requirement.Fig. 4 is by side of the present invention
Antenna array design result obtained by method, in figure, light color is initial antenna array, and black feed is based on minimum redundant array
The feed newly added in the case of arrangement, total feed number is 14.Fig. 5 is the redundancy situation of baseline, it can be seen that except the longest base
The redundancy of other baselines of line is both greater than 1, and the baseline that redundancy is 2 meets design requirement.
It should be noted last that, above example is only in order to illustrate technical scheme and unrestricted.Although ginseng
According to embodiment, the present invention is described in detail, it will be understood by those within the art that, the technical side to the present invention
Case is modified or equivalent, and without departure from the spirit and scope of technical solution of the present invention, it all should be contained in the present invention
Right in the middle of.
Claims (2)
1. an antenna array design method for one-dimensional interference type micro-wave radiometer, including:
After determining the Long baselines of aerial array to be designed, calculate the minimal redundancy aerial array of this Long baselines, by
This minimal redundancy aerial array obtains the antenna element that newly adds after one or more groups adds new antenna element and arranges；Newly add described
The baseline redundancy of antenna element arrangement judges, if the redundancy of remaining baseline in addition to Long baselines is all higher than 1, then and institute
State and newly add that antenna element arrangement is preliminary meets design requirement, be 2 to newly adding redundancy in antenna element arrangement the most further
Baseline is analyzed, if two redundancy baselines are made up of four separate units, then it is assumed that the described antenna element that newly adds is arranged satisfied
Final design demand, is aerial array to be designed.
The antenna array design method of one-dimensional interference type micro-wave radiometer the most according to claim 1, it is characterised in that should
Method specifically includes following steps:
Step 101), determine the Long baselines u of aerial arraymax=Numin；Wherein, umaxIt is Long baselines, uminIt it is the shortest base
Line, N is baseline amount；
Step 102), to utilize simulated annealing to be calculated Long baselines be NuminMinimal redundancy aerial array Ant1；
Step 103), according to step 102) arrangement Ant of minimum redundant array that obtains1, it is calculated minimal redundancy antenna
The normalization aerial position of array is Antnr, vacant aerial position is Antem, vacant aerial position number is Nem；
Step 104), assume nadd=1,2...n is the antenna element being newly added for meeting aerial array redundancy demand
Number, then for each nadd, it is newly added option A nt of antennaaddHaveIndividual；
Step 105) from nadd=1 starts, and the scheme that each newly adds antenna element carries out exhaustive search, and obtains one newly
Antenna element arrangement: Antnew=[Antnr∪Antadd]；
Step 106) to step 105) obtained by the baseline redundancy of new antenna element arrangement judge, if except the longest base
Outside line l=N, the redundancy of other baselinesIt is all higher than 1, then it was initially believed that this aerial array meets design requirement, perform next
Step, otherwise, re-executes step 105)；
Step 107), assert that the aerial array meeting design requirement is further analyzed to preliminary, including: continue to redundancy be
The baseline of 2 is analyzed, it is assumed that the unit constituting two redundancy baselines is respectively [a1, a2] and [a3, a4], if four variablees are all
Unequal, then it is assumed that aerial array meets design requirement；If four variablees existing equal two variable, then it is assumed that antenna array
Row are unsatisfactory for demand, re-execute step 105), until obtaining meeting the aerial array that design requires.
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Cited By (3)
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| CN106785488A (en) * | 2017-01-17 | 2017-05-31 | 中国科学院国家空间科学中心 | The method for designing of the interference type micro-wave radiometer antenna array based on modularization submatrix |
| CN106785485A (en) * | 2016-12-29 | 2017-05-31 | 华中科技大学 | A kind of one-dimensional dual redundant aerial array and building method |
| CN109239699A (en) * | 2018-09-17 | 2019-01-18 | 西安空间无线电技术研究所 | A kind of spaceborne Distributed Integration aperture microwave radiation meter systems and design method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106785488B (en) * | 2017-01-17 | 2019-08-20 | 中国科学院国家空间科学中心 | The design method of interference type micro-wave radiometer antenna array based on modularization submatrix |
| CN109239699A (en) * | 2018-09-17 | 2019-01-18 | 西安空间无线电技术研究所 | A kind of spaceborne Distributed Integration aperture microwave radiation meter systems and design method |
| CN109239699B (en) * | 2018-09-17 | 2021-04-13 | 西安空间无线电技术研究所 | Satellite-borne distributed synthetic aperture microwave radiometer system and design method |
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| CN106207488B (en) | 2018-10-02 |
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