CN101958459B - Geometric modeling method for panel slot antenna - Google Patents
Geometric modeling method for panel slot antenna Download PDFInfo
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- CN101958459B CN101958459B CN 201010289295 CN201010289295A CN101958459B CN 101958459 B CN101958459 B CN 101958459B CN 201010289295 CN201010289295 CN 201010289295 CN 201010289295 A CN201010289295 A CN 201010289295A CN 101958459 B CN101958459 B CN 101958459B
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Abstract
The invention discloses a geometric modeling method for a panel slot antenna, mainly overcoming the defects of poor generality and long modeling period in the traditional geometric modeling method. The geometric modeling method comprises the following modeling steps of: firstly, splitting the antenna into a plurality of subassemblies according to the characteristic of local similarity of a panel slot antenna structure; secondly, establishing a geometric model of each subassembly and translating the geometric models to the corresponding spatial positions through circulating the structural parameter information of each subassembly; and finally, combining according to the affiliation relationship of each subassembly and a submatrix to obtain the geometric model of the whole panel slot antenna. The invention has the advantages of strong generality and high modeling efficiency and can be used for parametrically modeling a large-caliber panel slot antenna.
Description
Technical field
The invention belongs to antenna technical field, relate to the modeling of antenna, specifically in the situation that the Planar Slot Antenna structural parameters are determined, can set up rapidly the geometrical model of antenna, can be used for structure and the emi analysis of antenna.
Background technology
Planar Slot Antenna has the aperture efficiency height, realizes the performances such as Sidelobe easily, is widely used in airborne, the trailer-mounted radar.Antenna structure is typical multilayer, cavity, thin-wall construction, is made of several submatrixs.Each submatrix is made of radiating layer, coupling layer and excitation layer.Wherein radiating layer comprises radiating guide and radiating slot, and radiating slot is out the longitudinal slot on the radiating guide broadside; Coupling layer comprises coupled waveguide and coupling slot, and coupling slot is out the inclined slot on the coupled waveguide broadside; Excitation layer comprises excitation waveguide and excitation seam, and the excitation seam is for opening the longitudinal slot on the excitation waveguide broadside.In the development process of antenna, for realize antenna just, the requirement of intensity and electrical property, its structure and emi analysis are essential.The antenna geometrical model then is the basis of analyzing its structure and electromagnetism.But because the geometrical relationship of this type of antenna structure is comparatively complicated, existing Geometric Modeling Method, its main thought is the geometric parameter information according to antenna, the wave-guide cavity wave part of model antenna, then set up slotted section, again cavity part and slotted section are made up, set up final whole antenna geometrical model.This modeling method is a kind of parametric modeling method of common employing, its versatility is relatively poor, can only be applicable to a kind of geometrical model of topological form, in case antenna topology form changes to some extent, then need again provide the program of whole modeling process, seriously restrict the raising of antenna structure or emi analysis efficient, increased the lead time of antenna, caused the development cost of antenna high.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art, a kind of general Planar Slot Antenna Geometric Modeling Method is provided, improve the efficient of Planar Slot Antenna parametric modeling, reduce the lead time of antenna.
For achieving the above object, technical scheme of the present invention comprises the steps:
(1) radiating layer with each submatrix of Planar Slot Antenna splits into the radiating guide section that contains a radiating slot, the dimension information of this waveguide segment comprises biasing, length and the width of radiating slot, width, height and the length of radiating guide, and the position relationship of radiating slot and radiating guide, wherein the length of radiating guide is 1/2nd guide wavelengths, and the locus of this waveguide segment is determined by the radiating slot space coordinates;
(2) coupling layer with each submatrix of Planar Slot Antenna splits into the coupled waveguide section that contains a coupling slot, this waveguide segment dimension information comprises inclination angle, length and the width of coupling slot, width, height and the length of coupled waveguide, and the position relationship of coupling slot and coupled waveguide, wherein the length of coupled waveguide is 1/2nd guide wavelengths, and the locus of this waveguide segment is determined by the coupling slot space coordinates;
(3) the excitation layer of the radiating guide section after splitting and coupled waveguide section and Planar Slot Antenna, extract respectively the structural parameters information of radiating slot, coupling slot and excitation seam, this structural parameters information comprises its dimension information, space coordinates information, radiating guide, coupled waveguide, excitation waveguide information, and the affiliated relation information of radiating slot, coupling slot and excitation seam and each submatrix;
(4) with the physical dimension information of radiating slot as cyclic variable, set up the assembly of the radiating guide of radiating slot and 1/2nd guide wavelength length, according to the space coordinates information of radiating slot the assembly of this radiating guide is moved to corresponding locus, according to the affiliated relation information of radiating slot and each submatrix, the assembly merging of this radiating guide is become the radiating layer assembly of each submatrix again;
(5) with the physical dimension information of coupling slot as cyclic variable, set up the assembly of the coupled waveguide of coupling slot and 1/2nd guide wavelength length, according to the space coordinates information of coupling slot the assembly of this coupled waveguide is moved to corresponding locus, according to the affiliated relation information of coupling slot and each submatrix, the assembly merging of this coupled waveguide is become the coupling layer assembly of each submatrix again;
(6) to encourage the physical dimension information of stitching as cyclic variable, set up the assembly of excitation seam and corresponding excitation waveguide, space coordinates information according to the excitation seam will encourage the assembly of waveguide to move to corresponding locus, according to the affiliated relation information of excitation seam with each submatrix, the assembly merging of this excitation waveguide is become the excitation layer assembly of each submatrix again;
(7) radiating layer assembly, coupling layer assembly and the excitation layer assembly with each submatrix merges, and consists of the geometrical model of whole antenna.
Geometric Modeling Method of the present invention has the following advantages:
(1) because the present invention has utilized the design feature of itself local similarity of Planar Slot Antenna, antenna rationally can be split into many similar assemblies, thereby can set up by round-robin method the geometrical model of each assembly.And existing method does not adopt round-robin method to set up its geometrical model, has expended Geometric Modeling person's plenty of time, and has made mistakes easily.Compare with existing Geometric Modeling Method, effectively accelerate the whole geometry modeling process of Planar Slot Antenna, the lead time of having reduced antenna.
(2) since method of the present invention with the correlation of the parameter information of each assembly and inter-module as input message, in case the topological form of antenna changes, only need to revise corresponding antenna parameter message file, just can set up corresponding antenna geometrical model, have versatility.And the program versatility of existing Model-based method method exploitation is relatively poor, in case the topological form of antenna changes, then needs again to develop corresponding program according to the topological form of antenna.Therefore the present invention compares with existing method, has improved antenna Geometric Modeling efficient.
Description of drawings
Fig. 1 is the structure chart of existing Planar Slot Antenna;
Fig. 2 is the submatrix distribution map of Fig. 1 antenna;
Fig. 3 is a certain subarray configuration figure of Fig. 1 antenna;
Fig. 4 is the submatrix radiating layer structure chart of Fig. 1 antenna;
Fig. 5 is the submatrix coupling layer structure chart of Fig. 1 antenna;
Fig. 6 is the subarray excited layer structure chart of Fig. 1 antenna;
Fig. 7 is that the present invention is to the flow chart of Fig. 1 antenna parameter modeling;
Fig. 8 is with the assembly assumption diagram of the inventive method to the submatrix radiating layer fractionation of Fig. 1 antenna;
Fig. 9 is with the assembly assumption diagram of the inventive method to the submatrix coupling layer fractionation of Fig. 1 antenna;
Figure 10 is that the present invention is to the submatrix radiating layer parametric modeling procedure chart of Fig. 1 antenna;
Figure 11 is that the present invention is to the submatrix coupling layer parametric modeling procedure chart of Fig. 1 antenna;
Referring to accompanying drawing the present invention is described in further detail.
Embodiment
With reference to Fig. 1, existing Planar Slot Antenna has the characteristics of multilayer, cavity, thin-wall construction, and according to the requirement of bandwidth, this antenna is comprised of several submatrixs usually, and its submatrix distribution situation as shown in Figure 2.Each submatrix is made of radiating layer, coupling layer and excitation layer again, and as shown in Figure 3, it is respectively radiating layer, coupling layer and excitation layer from top to bottom, wherein:
Uppermost radiating layer, consisted of by some radiating guides and radiating slot, radiating slot is out the longitudinal crack of aspect disalignment on radiating guide, as shown in Figure 4, each root radiating guide has some radiating slots, the two ends of radiating guide are short circuit face, and the centreline spacing of adjacent radiation seam is 1/2nd guide wavelength, is the quarter-wave guide wavelength near the radiating slot of radiating guide short circuit face and the distance of short circuit face.
Middle coupling layer, consisted of by a coupled waveguide and some coupling slot, coupling slot is out the centroclinal seam of aspect on coupled waveguide, simultaneously coupling slot realizes that coupled waveguide is connected connection with radiating guide, as shown in Figure 5, coupled waveguide has some coupling slots, and the two ends of coupled waveguide are short circuit face, the centreline spacing of adjacent coupled seam is 1/2nd guide wavelength, is 1/2nd guide wavelengths near the coupling slot of coupled waveguide short circuit face and the distance of short circuit face.
Following excitation layer, consisted of by an excitation waveguide and an excitation seam, the excitation seam is for opening the longitudinal crack at excitation waveguide upper strata face disalignment, excitation seam realizes that the excitation waveguide is connected connection with coupled waveguide simultaneously, as shown in Figure 6, one end of excitation waveguide is short circuit face, and the other end then is connected with power division network and carries out feed.
Because the geological information of radiating layer, coupling layer and the excitation layer of each submatrix is different, especially the number of every radiating guide in the submatrix and length is inconsistent, has increased the difficulty of antenna Geometric Modeling.According to the architectural characteristic of radiating layer and coupling layer as can be known, the spacing of adjacent radiation seam or coupling slot satisfies 1/2nd guide wavelength on same radiating guide or the coupled waveguide.As take radiating slot or coupling slot as reference center, the radiating guide corresponding with it or the length of coupled waveguide are taken as 1/2nd guide wavelength, consist of an assembly, then the inter-module difference that consists of of different radiating slots or coupling slot only is that the structural parameters information of radiating slot or coupling slot is different, so this kind inter-module has the characteristics of similitude.So the present invention, has proposed a kind of general antenna geometrical model parametric modeling method according to the characteristics of this local similarity of antenna.Owing to adopted round-robin method to set up each assembly, expanded to a certain extent the scope of application of parametric modeling, can be used for the parametric modeling of same kind antenna.
For antenna shown in Figure 1, the basic ideas that the present invention has provided parametric modeling are: radiating layer, the coupling layer with antenna splits into the assembly that contains a radiating slot or coupling slot first, by the structural parameters of circulate each radiating slot or coupling slot and excitation seam, set up the geometrical model of each assembly and each subarray excited layer; According to the excitation layer of each assembly and each submatrix and the affiliated relation information of submatrix, merge the geometrical model of each assembly and excitation layer again, form final antenna geometrical model.
With reference to Fig. 7, the present invention comprises as follows to the concrete steps of Planar Slot Antenna Geometric Modeling:
The first step: the radiating layer that splits each submatrix
(1a) radiating layer with each submatrix of Planar Slot Antenna splits into the radiating guide section assembly that contains a radiating slot, and as shown in Figure 8, wherein the length of radiating guide section is 1/2nd guide wavelengths;
(1b) extract the structural parameters information of each assembly, comprise the affiliated relation of length, locus coordinate and this assembly and submatrix of height, the radiating guide of width, the radiating guide of biasing, length and width, the radiating guide of radiating slot, its spatial location coordinate is determined by radiating slot center coordinate;
The structural parameters information of (1c) preserving each assembly is editable txt file, the design parameter information of every delegation comprises in the file: radiating slot numbering, radiating slot biasing, radiating slot length, radiating slot width, radiating guide width, radiating guide height, radiating guide segment length, locus coordinate x, y, the affiliated relation of z and this assembly and submatrix, wherein the affiliated relation of assembly and submatrix adopts 0 and 1 to distinguish, 0 this assembly of expression is not in corresponding submatrix, and 1 this assembly of expression is in corresponding submatrix.
Second step: the coupling layer that splits each submatrix
(2a) coupling layer of each submatrix splits into the coupled waveguide section assembly that contains a coupling slot, as shown in Figure 9, wherein the length of coupled waveguide section is 1/2nd guide wavelengths, and for the assembly near coupled waveguide short circuit face, the length of its coupled waveguide section is 3/4ths guide wavelengths;
(2b) extract the structural parameters information of each assembly, the affiliated relation that comprises coupling slot inclination angle, coupling slot length, coupling slot width, coupled waveguide width, coupled waveguide height, coupled waveguide length, locus coordinate and this assembly and submatrix, wherein the locus coordinate of this assembly is determined by coupling slot center coordinate;
The structural parameters information of (2c) preserving each assembly is editable txt file, the design parameter information of every delegation comprises in the file: the locus coordinate x of coupling slot numbering, coupling slot inclination angle, coupling slot length, coupling slot width, coupled waveguide width, coupled waveguide height, coupled waveguide segment length, this assembly, y, the affiliated relation of z and this assembly and submatrix.
The 3rd step: extract each subarray excited layer structural parameters information
(3a) from the excitation layer of Planar Slot Antenna, extract the structural parameters information of each subarray excited layer, comprise excitation seam biasing, excitation seam length, excitation seam width, excitation duct width, excitation duct height, excitation waveguide length, excitation seam center to the affiliated relation of distance, this excitation layer space coordinates and this excitation layer and the submatrix of excitation waveguide short face, wherein the space coordinates of this excitation layer is definite by the coordinate of excitation seam center;
The structural parameters information of (3b) preserving each subarray excited layer is editable txt file, the design parameter information of every delegation is included as in the file: excitation seam numbering, the biasing of excitation seam, excitation seam length, excitation seam width, excitation duct width, excitation duct height, excitation waveguide segment length, excitation seam center are to the distance of excitation waveguide short face, the locus coordinate x of this excitation layer, y, the affiliated relation of z and this excitation layer and submatrix.
The 4th step: the Geometric Modeling of radiating layer assembly
The radiating layer component file that (4a) utilizes the first step to provide, adopt radiating slot numbering, radiating slot biasing, radiating slot length, radiating slot width, radiating guide width, radiating guide height and radiating guide segment length in every delegation modular construction parameter information in circulation this document, set up the geometrical model of each radiating layer assembly, carry out as follows:
(4a1) according to radiating guide information, set up the radiating guide of 1/2nd guide wavelength length;
(4a2) according to the dimension information of radiating slot, set up radiating slot;
(4a3) take radiating guide upper strata broadside face geometric center as the coordinate center, the translation radiating slot, with geometric center and this coordinate center superposition of radiating slot subsurface, the rotation radiating slot makes its long limit parallel with the waveguide length direction;
(4a4) according to the biased data in the dimension information of radiating slot, radiating slot is departed from corresponding distance along its short side direction, again this radiating slot and radiating guide are merged, form final radiating guide assembly, namely obtain the geometrical model of radiating layer assembly;
The radiating layer component file that (4b) utilizes the first step to provide, adopt the locus coordinate x in every delegation component parameter information in circulation this document, y, z, each radiating layer assembly geometrical model is moved to corresponding locus, obtain the as shown in figure 10 radiating layer assembly combination assumption diagram of each submatrix.
The 5th step: the Geometric Modeling of coupling layer assembly
The radiating layer component file that (5a) utilizes second step to provide, adopt coupling slot numbering, coupling slot inclination angle, coupling slot length, coupling slot width, coupled waveguide width, coupled waveguide height and coupled waveguide segment length in every delegation component parameter information in circulation this document, set up the geometrical model of each coupling layer assembly, carry out as follows:
(5a1) according to coupled waveguide information, set up the coupled waveguide of 1/2nd guide wavelength length;
(5a2) according to the dimension information of coupling slot, set up coupling slot;
(5a3) take coupled waveguide upper strata broadside face geometric center as the coordinate center, translation coupling slot, with geometric center and this coordinate center superposition of coupling slot subsurface, the rotation radiating slot makes its long limit parallel with the waveguide length direction;
(5a4) according to the inclination data in the dimension information of radiating slot, further with radiating slot along the corresponding angle of waveguide length direction rotation, this coupling slot and coupled waveguide are merged, form final coupled waveguide assembly, namely obtain the geometrical model of coupling layer assembly;
The coupling layer component file that (5b) utilizes second step to provide, adopt the locus coordinate x in every delegation component parameter information in circulation this document, y, z, each coupling layer assembly geometrical model is moved to corresponding locus, obtain the as shown in figure 11 coupling layer assembly combination assumption diagram of each submatrix.
The 6th step: the Geometric Modeling of excitation layer
(6a) utilize the 3rd to go on foot the excitation layer file that provides, adopt the seam of the excitation in each line parameter information numbering in circulation this document, the biasing of excitation seam, excitation seam length, excitation seam width, excitation duct width, excitation duct height, excitation waveguide segment length and excitation seam center to the distance of excitation waveguide short face, set up the geometrical model of each subarray excited layer, carry out as follows:
(6a1) according to excitation waveguide information, set up the excitation waveguide;
(6a2) according to the dimension information of excitation seam, set up the excitation seam;
(6a3) take excitation waveguide upper strata broadside face geometric center as the coordinate center, translation excitation seam, with geometric center and this coordinate center superposition of excitation seam subsurface, the rotation excitation seam makes its long limit parallel with the waveguide length direction;
(6a4) according to the amount of bias data in the dimension information of excitation seam, further will encourage seam to depart from corresponding distance along its short side direction;
(6a5) further will encourage seam along its long side direction translation, satisfy and encourage the seam geometric center to the distance that encourages waveguide one end in the dimension information that encourages seam, should encourage seam and excitation waveguide to merge, form final field wave guide assembly, namely obtain the excitation layer geometrical model;
(6b) utilize the 3rd to go on foot the excitation layer file that provides, adopt the locus coordinate x in each line parameter information in circulation this document, y, z moves to corresponding locus with each excitation layer geometrical model.
The 7th step: merge the whole geometry model that obtains antenna
Utilize the excitation layer file that radiating layer file that the first step provides, coupling layer file that second step provides and the 3rd step provide, adopt in each line parameter information and affiliated relation information submatrix in each file of circulation, merge the radiating layer assembly geometrical model, coupling layer assembly geometrical model and the excitation layer assembly geometrical model that belong to same submatrix, obtain the geometrical model of each submatrix, namely obtain the geometrical model of integrated antenna.
Claims (7)
1. a Planar Slot Antenna Geometric Modeling Method comprises the steps:
(1) radiating layer with each submatrix of Planar Slot Antenna splits into the radiating guide section assembly that contains a radiating slot, the dimension information of this radiating guide section assembly comprises biasing, length and the width of radiating slot, width, height and the length of radiating guide, and the position relationship of radiating slot and radiating guide, wherein the length of radiating guide is 1/2nd guide wavelengths, and the locus of this radiating guide section assembly is determined by the radiating slot space coordinates;
(2) coupling layer with each submatrix of Planar Slot Antenna splits into the coupled waveguide section assembly that contains a coupling slot, this coupled waveguide section size of components information comprises inclination angle, length and the width of coupling slot, width, height and the length of coupled waveguide, and the position relationship of coupling slot and coupled waveguide, wherein the length of coupled waveguide is 1/2nd guide wavelengths, and the locus of this coupled waveguide section assembly is determined by the coupling slot space coordinates;
(3) the excitation layer of the radiating layer after splitting and coupling layer and Planar Slot Antenna, extract respectively the structural parameters information of radiating slot, coupling slot and excitation seam, this structural parameters information comprises its dimension information, space coordinates information, radiating guide, coupled waveguide, excitation waveguide information, and the affiliated relation information of radiating slot, coupling slot and excitation seam and each submatrix;
(4) with the physical dimension information of radiating slot as cyclic variable, set up the radiating guide section assembly of radiating slot and 1/2nd guide wavelength length, according to the space coordinates information of radiating slot this radiating guide section assembly is moved to corresponding locus;
(5) with the physical dimension information of coupling slot as cyclic variable, set up the coupled waveguide section assembly of coupling slot and 1/2nd guide wavelength length, according to the space coordinates information of coupling slot this coupled waveguide section assembly is moved to corresponding locus;
(6) to encourage the physical dimension information of stitching as cyclic variable, set up excitation seam and corresponding excitation waveguide, should encourage waveguide to move to corresponding locus according to the space coordinates information that encourages seam;
(7) according to radiating slot, coupling slot and the excitation seam affiliated relation information with each submatrix, radiating guide section assembly, coupled waveguide section assembly and excitation waveguide are merged into geometrical model into each submatrix, consist of the geometrical model of whole antenna.
2. modeling method according to claim 1, wherein said radiating guide, coupled waveguide information include its height and width information.
3. modeling method according to claim 1, wherein said excitation waveguide information comprises its length information, elevation information and width information.
4. modeling method according to claim 1, the affiliated relation information of wherein said radiating slot, coupling slot and excitation seam and each submatrix, to distinguish with 0 and 1, namely 0 this radiating slot of expression, coupling slot and excitation seam be not in corresponding submatrix, and 1 this radiating slot of expression, coupling slot and excitation are sewn in the corresponding submatrix.
5. modeling method according to claim 1, the described radiating guide section assembly of setting up radiating slot and 1/2nd guide wavelength length of step (4) wherein, carry out as follows:
(4a) according to radiating guide information, set up the radiating guide of 1/2nd guide wavelength length;
(4b) according to the dimension information of radiating slot, set up radiating slot;
(4c) take radiating guide upper strata broadside face geometric center as the coordinate center, the translation radiating slot, with geometric center and this coordinate center superposition of radiating slot subsurface, the rotation radiating slot makes its long limit parallel with the waveguide length direction;
(4d) according to the amount of bias data in the dimension information of radiating slot, radiating slot is departed from corresponding distance along its short side direction, again this radiating slot and radiating guide are merged, form final radiating guide section assembly.
6. modeling method according to claim 1, the described coupled waveguide section assembly of setting up coupling slot and 1/2nd guide wavelength length of step (5) wherein, carry out as follows:
(5a) according to coupled waveguide information, set up the coupled waveguide of 1/2nd guide wavelength length;
(5b) according to the dimension information of coupling slot, set up coupling slot;
(5c) take coupled waveguide upper strata broadside face geometric center as the coordinate center, translation coupling slot, with geometric center and this coordinate center superposition of coupling slot subsurface, rotation coupling slot makes its long limit parallel with the waveguide length direction;
(5d) according to the inclination data in the dimension information of coupling slot, further with coupling slot along the corresponding angle of waveguide length direction rotation, this coupling slot and coupled waveguide are merged, form final coupled waveguide section assembly.
7. modeling method according to claim 1, the wherein described foundation excitation of step (6) seam and excitation waveguide, carry out as follows:
(6a) according to excitation waveguide information, set up the excitation waveguide;
(6b) according to the dimension information of excitation seam, set up the excitation seam;
(6c) take excitation waveguide upper strata broadside face geometric center as the coordinate center, translation excitation seam, with geometric center and this coordinate center superposition of excitation seam subsurface, the rotation excitation seam makes its long limit parallel with the waveguide length direction;
(6d) according to the amount of bias data in the dimension information of excitation seam, further will encourage seam to depart from corresponding distance along its short side direction;
(6e) further will encourage seam along its long side direction translation, and satisfy and encourage the seam geometric center to the distance that encourages waveguide one end in the dimension information that encourages seam, should encourage seam and encourage waveguide to merge, form final excitation waveguide.
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| CN109672026B (en) * | 2018-12-11 | 2021-06-04 | 上海无线电设备研究所 | Modularized integrated broadband millimeter wave waveguide slot antenna array |
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| CN101252223A (en) * | 2008-04-03 | 2008-08-27 | 西安电子科技大学 | Method for determining flatness of flat plate slotted antenna array face |
| CN101252224A (en) * | 2008-04-08 | 2008-08-27 | 西安电子科技大学 | Prediction method of flat plate slit aerial seam manufacturing accuracy for electrical property influence |
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| CN101252223A (en) * | 2008-04-03 | 2008-08-27 | 西安电子科技大学 | Method for determining flatness of flat plate slotted antenna array face |
| CN101252224A (en) * | 2008-04-08 | 2008-08-27 | 西安电子科技大学 | Prediction method of flat plate slit aerial seam manufacturing accuracy for electrical property influence |
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