CN111337769B - Horizontal polarization bounded wave electromagnetic pulse simulator, wire grid polar plate and wire grid arrangement method - Google Patents
Horizontal polarization bounded wave electromagnetic pulse simulator, wire grid polar plate and wire grid arrangement method Download PDFInfo
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a horizontal polarization bounded wave electromagnetic pulse simulator, a wire grid polar plate and a wire grid arrangement method. The invention adopts the wire grid layout mode that the number of bus grids pulled out from the edge of the upper half part of the biconical circular section is less than that pulled out from the edge of the lower half part, thereby reducing the use of the number of bus grids forming the simulator; through a specific arrangement, the lengths of all the wire grids pulled out of the upper half part edge of the biconic section are reduced in a mode that all the wire grids pulled out of the upper half part edge of the biconic section are respectively and directly connected with the corresponding part of the wire grids pulled out of the lower half part edge at a certain height from the ground. Compared with the uniform layout mode, the current path flowing through the wire grid is shortest, so that electromagnetic waves radiated to the outer sides of the two polar plates through the wire grid are attenuated, and the minimum value of the field peak value in a certain area in the simulator is not reduced but is increased.
Description
Technical Field
The application mainly relates to a wire grid layout mode of a horizontal polarization bounded wave electromagnetic pulse simulator.
Background
The horizontal polarization bounded wave electromagnetic pulse (EMP) simulator (BAILEY V et al, published in IEEE Trans. plasma Science, 2010, volume 38, page 2557, 2558, "A6-MV pulse to drive horizontal polarized EMP simulators", and Zhuxiangqin et al, published in computational physics, journal, 2019, volume 36, page 691, page 698, "parallel simulation analysis of large horizontal polarization electromagnetic pulse bounded wave electromagnetic pulse simulator") has been widely studied because of its ability to provide two EMP environments, namely "free space" and "near ground" for EMP effect experiments. The simulator mainly comprises a bicone erected in the air, symmetrical wire grid polar plates which are respectively drawn from the edge of the cross section of the bottom of the bicone circular cone to the ground at two sides by the wire grids, and resistors which are connected with the tail ends of the wire grids in series. The working space is located between two symmetrical wire grid plates below the double cone (i.e. inside the simulator).
For the EMP effect experiment, the horizontal polarization bounded wave EMP simulator must provide an effective working space meeting the requirement of a field peak value technical index for a tested device (EUT), namely the minimum value of the field intensity of a measuring point in an inner area of the simulator directly determines the size of the effective experimental area and the performance of the simulator. On the other hand, since the simulator belongs to the guided wave type simulator, the layout of the wire grid plate constituting the simulator directly affects the magnitude of the field peak inside the simulator. Therefore, it is necessary to study the wire grid layout of the wire grid plate in the horizontal polarization bounded wave EMP simulator. BAILEY V et al (see the above-mentioned documents) have given side-view, end-view and top-view schematic diagrams of a horizontally polarized bounded wave EMP simulator, and mention the total number of wire grids forming a single-side wire grid plate of the simulator and how many wire grids are combined into one strand and finally connected to the ground; zhuxiangqin et al (see the aforementioned documents) give a schematic diagram of a simplified structure of a horizontally polarized bounded wave EMP simulator. Neither gives a detailed layout of the wire grids in the wire grid plate of the simulator. And no relevant report exists at home and abroad so far.
Based on the current research on the horizontal polarization bounded wave EMP simulator, the skilled person usually considers the specific design of the wire grid plate as the layout way that the upper end of the wire grid is uniformly distributed on the edge of the cross section of the biconical circular cone bottom.
Disclosure of Invention
The purpose of the application is mainly: the wire grid layout of the horizontal polarization bounded wave electromagnetic pulse simulator is designed, so that the total number of wire grids used for forming a wire grid polar plate of the simulator is small, the total length of the wire grids is short, the number of resistors used as distributed loads is small, the minimum value of a field peak value in a certain area inside the simulator can be improved, the area of an effective experimental area is increased, and the effect of optimizing the wire grid layout of the simulator is achieved.
Under the conditions that the radius of the double-cone circular cone bottom of a horizontal polarization bounded wave EMP simulator is kept unchanged, the height of a simulator frame is unchanged, impedance matching of the characteristic of double cones is realized, and the wire grating layout of polar plates on two sides of the simulator is symmetrical, the total number of the wire gratings forming one side of the simulator is selected to be integral multiples of 6, the total number of the wire gratings pulled from the upper half part edge of the section of the side of the circular cone bottom is equal to half of the total number of the wire gratings pulled from the lower half part edge of the section of the side of the circular cone bottom, and the wire gratings forming the wire grating polar plates of the simulator can be used for reducing the total number, the total length and the number of distributed resistors at the tail end when the wire gratings are connected with a certain height from the ground according to a specific distribution. Compared with a layout mode that the upper ends of the wire grids are uniformly distributed on the edge of the section of the cone bottom (the uniform layout mode for short), the wire grids are arranged in a mode that the current path flowing through the wire grids is shortest, so that electromagnetic waves radiated to the outer sides of the two polar plates through the wire grids are attenuated, the minimum value of a field peak value in a certain area in the simulator cannot be reduced, and a new idea of the layout of the wire grids of the horizontally polarized bounded wave electromagnetic pulse simulator is provided.
The application provides the following technical scheme:
in a first aspect, a horizontally polarized bounded wave electromagnetic pulse simulator wire grid arrangement method includes:
(1) determining the total number N of wire grids constituting a single-sided polar plate of a simulatort，NtIs an integer multiple of 6;
(2) total number N of wire gridstDivided into two parts, one part is the total number N of the wire grids pulled from the edge of the upper half part of the circular cone bottom section at one sideuThe other part is the total number N of the wire grids pulled from the edge of the lower half part of the bottom section of the side conedSatisfy Nu＝Nd/2，Nu+Nd＝Nt；
(3) Setting the radius of the circular cone bottom section of the double cones to be R, setting the maximum width of the contact position of the single-side polar plate and the ground to be w, setting the origin O point of an xyz coordinate system to be at the circle center position of the circular cone bottom section of the side, enabling the x axis to pass through the O point along the horizontal direction, enabling the + y axis to pass through the O point upwards along the vertical direction, and then setting the radius of the circular cone bottom section of the double cones to be R, setting the maximum width of the contact position of the single-side polar plate and the ground to be w, setting the origin O point of the xyz coordinate system to be at the circle center position of the circular cone bottom section of the side cone, setting the x axis to pass through the O point along the horizontal direction, setting the x axis to pass through the O point upwards along the vertical direction, and setting the x axis to be at the center position of the circular cone bottom section of the side cone bottom section of the double cones to be R<0, N is drawn from the lower half edge of the side circular cone bottom section y less than or equal to 0 to the side grounddThe/2 wire grids are arranged in the following way:
the upper end of the 1 st wire grid is connected with the edge position of x-R on the section of the cone bottom, and the lower end of the 1 st wire grid is connected with the leftmost side x-w/2 of the bottom of the side electrode plate; cross section of upper end and conic bottom of No. 2 wire gridx-axis counter-clockwise deflection alpha pi/(N)d-1) angularly corresponding edge positions connected with the lower end of the 1 st wire grid at the shortest distance d between adjacent wire grids on the single-sided platex＝w/(Nd-1); the upper end of the ith wire grid is connected with the edge position corresponding to the angle of counterclockwise deflection beta (i-1) alpha from the x axis on the section of the cone bottom, and the interval between the lower end of the ith wire grid and the lower end of the 1 st wire grid is (i-1) dxI is 2-Nd/2；
(4) If the point Q is half of the maximum width of the contact position of the side pole plate and the ground, that is, x is 0, then x is the maximum width<0 region, cross section y of the conical bottom from the side>N of upper half edge of 0 pulled to the side ground u2, the wire grids are arranged preliminarily according to the following modes:
the upper end of the 1 st wire grid is connected with the edge position corresponding to the angle of counterclockwise deflection alpha/2 from the y axis on the section of the circular cone bottom, and the interval between the lower end of the 1 st wire grid and the Q point is (1+1/2) dx(ii) a The upper end of the jth wire grating is connected with the edge position corresponding to the angle of (2j-3/2) alpha which is deflected anticlockwise from the y axis on the section of the cone bottom, and the lower end of the jth wire grating is separated from the lower end of the 1 st wire grating by (2j-2) dxJ takes a value of 2 to Nu/2；
(5) N for preliminary arrangement of step (4)uThe/2 wire grids were adjusted as follows:
maintaining and tapering the section y>The upper end position of the j wire grid connected with the upper half part edge of 0 is fixed, and the lower end position is only moved upwards to the (N) th wire grid pulled to the side ground from the lower half part edge of the side cone bottom section y less than or equal to 0d2-2j +1) wire grids, the height of the intersection point of the two wire grids and the ground is hj，hjThe value of (a) is larger than the highest height of resistance loading and smaller than the height of the simulator, and the stability of the erection of the double cones of the simulator is ensured; completion x<Section y in the region 0 from the side cone bottom>N of upper half edge of 0 pulled to the side groundu(ii)/2 final placement of wire grids;
(6) in a symmetrical mode, referring to the wire grid layout of the single-side polar plate in the x <0 region, and taking x ═ 0 as a symmetrical plane, realizing the wire grid layout of the single-side polar plate in the x >0 region, thereby realizing the arrangement of all wire grids on the single-side polar plate;
(7) and (5) referring to the steps (2) to (6), finishing the layout of all the wire grids on the polar plate on the other side of the simulator, so that the wire grids on the polar plates on the two sides are completely arranged in the same mode.
In a second aspect, a method of constructing a horizontally polarized bounded wave electromagnetic pulse simulator includes:
A. erecting a double cone in the air;
B. according to the wire grid arrangement method, wire grids are respectively drawn into symmetrical wire grid polar plates from the edge of the cross section of the double-cone circular cone bottom to the ground at two sides;
C. according to the requirement of high voltage insulation, N is respectively pulled towards the ground of the corresponding side at the lower half part edge of the cross section of the circular cone bottoms at the two sidesdOn the wire grid, from a distance h from the groundRIs initially added along the line downwards with a plurality of resistors acting as distributed loads, given that the peak value of the high voltage excitation source of the simulator is Vs(in units of V), then hRIs taken to satisfy
During specific operation, the distributed load on one side can be added after the wire grid arrangement of the polar plates on the one side is completed, or the distributed load can be added again after the wire grid arrangement of the polar plates on the two sides is finally completed.
In a third aspect, a horizontally polarized bounded wave electromagnetic pulse simulator wire grid plate is obtained according to the wire grid arrangement method.
In a fourth aspect, a horizontally polarized bounded wave electromagnetic pulse simulator is obtained according to the construction method.
The invention has the beneficial effects that:
1) the wire grid layout mode that the number of bus grids pulled out from the edge of the upper half part of the biconical circular section is smaller than that pulled out from the edge of the lower half part is adopted, and the number of bus grids forming the simulator is reduced.
2) Through a specific arrangement, the lengths of all the wire grids pulled out of the upper half part edge of the biconic section are reduced in a mode that all the wire grids pulled out of the upper half part edge of the biconic section are respectively and directly connected with the corresponding part of the wire grids pulled out of the lower half part edge at a certain height from the ground.
3) Because the distributed resistors are added on the wire grid pulled out from the edge of the lower half part, compared with a layout mode (called as a uniform layout mode for short) that the upper end of the wire grid is uniformly distributed on the edge of the bottom section of the biconical cone, the number of the resistors used can be greatly reduced.
4) Compared with the uniform layout mode, the current path flowing through the wire grid is shortest, so that electromagnetic waves radiated to the outer sides of the two polar plates through the wire grid are attenuated, and the minimum value of the field peak value in a certain area in the simulator is not reduced but is increased.
Drawings
FIG. 1 shows N drawn from the lower half edge of the circular cone bottom section y of one side cone ≦ 0 to the ground of the side conedSchematic diagram of layout of 2 wire grids. Fig. 1 shows only x, considering that the wire grid layout has left/right symmetry for a plane where x is 0<Wire grid of 0 region. In the figure, NdThe total number of the wire grids pulled from the edge of the lower half part of the side cone bottom section y is less than or equal to 0; w is the maximum width of the contact position of the wire grid polar plate of the simulator and the ground, dx＝w/(Nd-1) is the shortest interval between adjacent wire grids on the same wire grid plate contacted with the ground, the origin O point of the xyz coordinate system is positioned at the center of the section of the cone bottom on one side, and R is the radius of the cone bottom (the same below). In addition, the figure is also marked with the NdThe 2 nd wire grid and the ith wire grid (i is from 2 to N) in the 2 nd wire gridd/2) angles alpha and beta corresponding to the upper ends of the wire grids, and the spacing d between the lower ends of adjacent wire gridsx。
FIG. 2 is x<Area 0 is taken from the circular cone base section y of the side cone>N of upper half edge of 0 pulled to the side grounduSchematic diagram of preliminary layout of 2 wire grids. In the figure, NuIs a section y from the side cone bottom>0 toThe total number of the wire grids pulled by the half part of the edge; the point Q is half of the maximum width of the contact position of the wire grid plate of the simulator and the ground (namely, the position where x is 0). In addition, N is also marked in the figureuOf the/2 wire grids, the 1 st wire grid and the jth wire grid (j takes a value of 2-N)uThe position of/2) includes the included angles alpha/2 and theta corresponding to the upper ends of the two.
FIG. 3 is x<And (3) a schematic diagram of a layout mode (referred to as a "uniform layout mode" for short) in which the upper ends of the wire grids in the region of 0 are uniformly distributed on the edge of the circular cone bottom section of the side cone. In the figure, NtThe total number of wire grids forming one side plate of the simulator. The 1 st wire grid and the kth wire grid are marked in the figure (k takes a value of 2-N)t/2) and NthtThe upper ends and the lower ends of the first two wire grids are positioned at an included angle corresponding to the joint of the upper ends of the first two wire grids and the edge of the section of the cone bottom
(getting
And
and a space d between lower ends of adjacent wire gridsw＝w/(Nt-1)。
Detailed Description
In order to reduce the number of bus grids, the total length of the grids and the number of resistors used as distributed loads, which form the simulator, and ensure that the minimum value of the field peak value in the internal area of the simulator is not reduced, a special grid layout mode is adopted in the application. The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
In this embodiment, the peak value V of the high voltage excitation source of the simulator is sets3 MV; the total number of the wire grids forming the single-side polar plate of the simulator is NtThe height of the simulator is 10 m; the double cone half angles are both 32 degrees, so the distance between the polar plates on the two sides of the simulator is 32 m. The biconic impedance is 150 omega. FIG. 1 shows N drawn from the lower half edge of the circular cone bottom section y of one side cone ≦ 0 to the ground of the side coned/2 wire grid clothSchematic diagram of the office approach. The structure is as shown in figure 1: n is a radical ofd＝2NtA/3; in order to meet the impedance matching condition, the maximum width w of the single-side polar plate is 43 m; dx＝w/(Nd-1) is the shortest interval between adjacent wire grids on the same wire grid plate in contact with the ground, the origin O point of the xyz coordinate system is located at the center of the cross section of the cone bottom of the side cone, and the radius R of the biconic circular cone bottom is 1.25m (the same below). In addition, the included angle α ═ pi/(N) in the figured-1); beta is (i-1) alpha, i is 2-Nd/2. FIG. 2 is x<Area 0 is a cross section y taken from the bottom of the side cone>N of upper half edge of 0 pulled to the side grounduSchematic diagram of preliminary layout of 2 wire grids. In the figure, Nu＝NtA/3; the point Q is half of the maximum width of the contact position of the wire grid plate of the simulator and the ground (namely, the position where x is 0). Theta is (2j-3/2) alpha, and j is 2-Nu/2。
The concrete links are introduced as follows:
(1) selecting the total number N of wire grids forming the single-side polar plate of the simulatortAnd ensure NtIs an integer multiple of 6.
(2) The total number N of the wire grids pulled from the upper half part edge of the section of the circular cone bottom at one sideuEqual to the total number N of wire grids pulled from the edge of the lower half part of the wire griddHalf of (i.e. satisfy N)u＝N d2; and satisfy Nu+Nd＝Nt. Accordingly, according to N given in (1)tBy obtaining NuAnd NdValue of (1), i.e. Nd＝2Nt/3；Nu＝Nt/3。
(3) If the maximum width of the contact position of the wire grid polar plate of the simulator and the ground is w, the shortest interval d between adjacent wire grids on the same wire grid polar plate contacted with the groundx＝w/(Nd-1). At x<0, pulling N from the lower half edge of the circular cone bottom section y of one side cone to the ground of the side in the mode shown in figure 1dAnd 2 wire grids. The upper end of the 1 st wire grating is connected with the edge position of x ═ R on the section of the cone bottom, and the lower end is connected with the leftmost side of the bottom of the wire grating polar plate; upper end and conical bottom of No. 2 wire gratingα ═ pi/(N) in cross sectiond-1) the corresponding edge positions are connected with a lower end of the 1 st wire grid at a distance d from the lower end of the 1 st wire gridx(ii) a Similarly, the ith root (i takes values from 2 to N)dAnd/2) the upper end of the wire grid is connected with the edge position corresponding to the angle beta (i-1) alpha on the section of the cone bottom, and the interval between the lower end of the wire grid and the lower end of the 1 st wire grid is (i-1) dx. In the above manner, x is completed<N in the area 0 is pulled from the lower half edge of the cone bottom section y of one side cone less than or equal to 0 to the ground of the side conedAnd/2 arrangement of wire grids.
(4) Similarly, at x<0, cross-section y from the circular base of the side cone in the manner shown in FIG. 2>The upper half edge of 0 is pulled to the ground of the side NuAnd 2 wire grids. The upper end of the 1 st wire grid is connected with the edge position corresponding to alpha/2 on the section of the cone bottom in the figure 2, and the lower end of the wire grid is separated from the Q point by (1+1/2) dx(ii) a J-th wire grating (j takes a value of 2-N)u/2) is connected to the edge position corresponding to θ ═ 2j-3/2 a on the section of the cone bottom in fig. 2, and the interval between the lower end of the upper end of the lower end of the upper end of the 1 st wire grid and the lower end of the upper end of the lower end of the 1 st wire grid is (2j-2) dx. In the above manner, x is completed<Section y of the base of the lateral cone in the region 0>N of upper half edge of 0 pulled to the side grounduPreliminary layout of 2 wire grids.
(5) According to the above items (3) and (4), in x<In the region 0, the circular cone base section y of the side cone>0, the j-th wire grid (j is 1-N) pulled by the edge of the upper half part of the wire grid to the ground of the sideuThe contact point between the contact point and the ground is (N) th when the contact point is pulled to the ground of the side from the lower half edge of the circular cone bottom section y of the side cone, which is less than or equal to 0d2-2j +1) the contact point of the wire grid with the ground. To reduce the cross-section y of the base of the cone from one side>N of upper half edge of 0 pulled to the side grounduThe use of 2 wire grid lengths to maintain the above-mentioned cross section with the cone base y>J-th wire grating (j is 1-N) connected with the edge of the upper half part of 0uThe upper end of the cone is fixed, and the lower end is only moved upwards to the (N) th position that the lower half part edge of the cone bottom section y of the side cone is less than or equal to 0 is pulled to the side groundd2-2j +1) wire grids, the height of the intersection point of the two wire grids and the ground is hj. In the above manner, x is completed<Section y of the base of the cone in the region 0 from one side>N of upper half edge of 0 pulled to the side groundu/2 final layout of wire grid.
(6) And (4) according to the corresponding wire grid layout of the single-side wire grid plate in the x <0 region in the steps (3) to (5), realizing the wire grid layout of the side wire grid plate in the x >0 region in a symmetrical mode, and further realizing the layout of all wire grids on the side wire grid plate.
(7) According to the requirement of high voltage insulation, N is respectively pulled towards the ground of the corresponding side at the lower half part edge of which the cross section y of the circular cone bottom at the two sides is less than or equal to 0dOn the wire grid, from a distance h from the groundRIs initially added down the line to a plurality of resistors acting as distributed loads having a total resistance of 75 omega (the total resistance of the distributed loads being half the biconic impedance). Considering hRMust satisfy
In this example, take hR＝1.59m。
(8) On the basis of (7), in a similar way, the layout of all wire grids on the polar plate on the other side of the simulator and the resistance loading used as the distributed load are completed, so that the wire grid layout and the resistance loading of the polar plates on the two sides are completely the same, and the wire grid layout and the distributed load loading of the horizontal polarization bounded wave EMP simulator are realized.
The execution sequence of the steps is not absolutely limited unless explicit order association is present.
Furthermore, according to FIG. 3, x is<The upper ends of the wire grids in the region of 0 are uniformly distributed on the edge of the cone-shaped section on one side (referred to as a uniform distribution mode). Wherein, the corresponding included angle of the joint of the upper end of the 1 st wire grid and the edge of the section of the double-cone circular cone bottom is
And is
The lower end is connected with the leftmost x (w/2) position at the bottom of the wire grid polar plate; the kth wire grating (k takes a value of 2-N)tThe corresponding included angle of the joint of the upper end of the cone bottom section edge is
The distance between the lower end of the first wire grid and the lower end of the 1 st wire grid is (k-1) dw，dw＝w/(Nt-1); then, by means of symmetry, the uniform layout of the wire grids of the horizontal polarization bounded wave EMP simulator is completed, and N is the position of the wire gridstA plurality of resistors serving as distributed loads having a total resistance of 75 Ω were added to the root wire grid from 1.59m above the ground, starting along the line downwards.
And translating the origin O of the xyz coordinate system to the central position O 'point of the double-cone tip of the simulator along the z axis to obtain a new x' y 'z' coordinate system. Considering the symmetry of the radiation field of the simulator in the new coordinate system, the minimum value of the field peak in the test area of 11m (x 'direction) × 9m (z' direction) on the horizontal plane 1m away from the ground inside the simulator is the same as the minimum values of the field peak of (x ', z') coordinates of the center point of (0,0) m and the other three corner points (5.5,0) m, (0,4.5) m and (5.5,4.5) m, respectively. The peak values of the four measurement point fields obtained by simulation using the present invention and the uniform layout are shown in table 1.
TABLE 1
As can be seen from Table 1, the minimum value of the field peak in the 11m × 9m test area is located at the corner point (± 5.5, ± 4.5) m of the area; and when the invention is adopted, N is takentThe minimum ratio of the field peak value of the region obtained by 36 adopts a uniform layout modeNtThe minimum value at 96 is also larger. In addition, since the total number of wire grids used in the present invention is small, the total number of resistors used as distributed loads is correspondingly reduced. Compared with the uniform layout mode of the wire grids, the wire grid array testing device has the advantages that the total number of the wire grids is reduced, the total length of the wire grids is reduced, the total number of the resistors used as distributed loads is reduced, and the minimum value of the field intensity peak value in a certain testing area in the simulator cannot be reduced but is increased. And the minimum value of the field intensity peak value in the test area is increased, so that the effective test area of the simulator is increased, and the radiation performance of the simulator is enhanced, thereby illustrating the effectiveness of the invention.
Due to the universality of the wire grid layout mode of the horizontal polarization bounded wave electromagnetic pulse simulator, when the height of the simulator is different and the radius of the bottom of the biconical circular cone or the half angle of the biconical cone of the simulator is different, the wire grid layout mode is still applicable and can obtain more satisfactory results than the uniform layout mode with the same total number of the wire grids. By adopting the wire grid layout designed by the invention, under the conditions of less total number of the wire grids, smaller total length of the wire grids and less total number of the resistors used as distributed loads, the minimum value of the field intensity peak value in a certain test area in the simulator is increased, so that the effective experimental area is increased, and the radiation performance of the simulator is improved.
Claims (4)
1. A method of horizontally-polarized bounded-wave electromagnetic pulse simulator wire grid arrangement, comprising:
(1) determining the total number N of wire grids constituting a single-sided polar plate of a simulatort，NtIs an integer multiple of 6;
(2) total number N of wire gridstDivided into two parts, one part is the total number N of the wire grids pulled from the edge of the upper half part of the circular cone bottom section at one sideuThe other part is the total number N of the wire grids pulled from the edge of the lower half part of the bottom section of the side conedSatisfy Nu＝Nd/2，Nu+Nd＝Nt；
(3) The radius of the cross section of the double-cone circular cone bottom is R, and the single-side polar plate and the ground are connectedThe maximum width of the surface contact position is w, the origin O point of an xyz coordinate system is positioned at the circle center position of the side cone bottom section, the x axis passes through the O point along the horizontal direction, the + y axis passes through the O point along the vertical direction, and then the X axis passes through the O point along the vertical direction<0, N is drawn from the lower half edge of the side circular cone bottom section y less than or equal to 0 to the side grounddThe/2 wire grids are arranged in the following way:
the upper end of the 1 st wire grid is connected with the edge position of x-R on the section of the cone bottom, and the lower end of the 1 st wire grid is connected with the leftmost side x-w/2 of the bottom of the side electrode plate; the upper end of the 2 nd wire grid and the section of the cone bottom deflect anticlockwise from the x axis in the opposite direction by alpha-pi/(N)d-1) angularly corresponding edge positions connected with the lower end of the 1 st wire grid at the shortest distance d between adjacent wire grids on the single-sided platex＝w/(Nd-1); the upper end of the ith wire grid is connected with the edge position corresponding to the angle of counterclockwise deflection beta (i-1) alpha from the x axis on the section of the cone bottom, and the interval between the lower end of the ith wire grid and the lower end of the 1 st wire grid is (i-1) dxI is 2-Nd/2；
(4) If the point Q is half of the maximum width of the contact position of the side pole plate and the ground, that is, x is 0, then x is the maximum width<0 region, cross section y of the conical bottom from the side>N of upper half edge of 0 pulled to the side groundu2, the wire grids are arranged preliminarily according to the following modes:
the upper end of the 1 st wire grid is connected with the edge position corresponding to the angle of counterclockwise deflection alpha/2 from the y axis on the section of the circular cone bottom, and the interval between the lower end of the 1 st wire grid and the Q point is (1+1/2) dx(ii) a The upper end of the jth wire grating is connected with the edge position corresponding to the angle of (2j-3/2) alpha which is deflected anticlockwise from the y axis on the section of the cone bottom, and the lower end of the jth wire grating is separated from the lower end of the 1 st wire grating by (2j-2) dxJ takes a value of 2 to Nu/2；
(5) N for preliminary arrangement of step (4)uThe/2 wire grids were adjusted as follows:
maintaining and tapering the section y>The upper end position of the j wire grid connected with the upper half part edge of 0 is fixed, and the lower end position is only moved upwards to the side from the lower half part edge of the side cone bottom section y being less than or equal to 0Pulled by the ground (N)d2-2j +1) wire grids, the height of the intersection point of the two wire grids and the ground is hj，hjThe value of (a) is larger than the highest height of resistance loading and smaller than the height of the simulator, and the stability of the erection of the double cones of the simulator is ensured; completion x<Section y in the region 0 from the side cone bottom>N of upper half edge of 0 pulled to the side groundu(ii)/2 final placement of wire grids;
(6) in a symmetrical mode, referring to the wire grid layout of the single-side polar plate in the x <0 region, and taking x ═ 0 as a symmetrical plane, realizing the wire grid layout of the single-side polar plate in the x >0 region, thereby realizing the arrangement of all wire grids on the single-side polar plate;
(7) and (5) referring to the steps (2) to (6), finishing the layout of all the wire grids on the polar plate on the other side of the simulator, so that the wire grids on the polar plates on the two sides are completely arranged in the same mode.
2. A method of constructing a horizontally polarized bounded wave electromagnetic pulse simulator, comprising:
A. erecting a double cone in the air;
B. the wire grid arrangement method as claimed in claim 1, wherein the wire grid is drawn into symmetrical wire grid plates from the edge of the cross section of the double-cone circular cone bottom to the ground at both sides;
C. according to the requirement of high voltage insulation, N is respectively pulled towards the ground of the corresponding side at the lower half part edge of the cross section of the circular cone bottoms at the two sidesdOn the wire grid, from a distance h from the groundRIs initially added along the line downwards with a plurality of resistors acting as distributed loads, given that the peak value of the high voltage excitation source of the simulator is VsThen h isRIs taken to satisfy
3. A horizontally polarized bounded wave electromagnetic pulse simulator wire grid plate obtained by the wire grid arrangement method of claim 1.
4. A horizontally polarized bounded wave electromagnetic pulse simulator obtained according to the construction method of claim 2.
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