CN106446377A - Method and system for calculating pilot frequency multi-antenna electromagnetic field distribution - Google Patents
Method and system for calculating pilot frequency multi-antenna electromagnetic field distribution Download PDFInfo
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Abstract
The invention discloses a method for calculating pilot frequency multi-antenna electromagnetic field distribution. The method includes the following steps that 1, a multi-antenna electromagnetic field simulation model of an actual scene is established; 2, simulation excitation is applied to each antenna independently, the simulation frequency is set as the working frequency of the antenna, simulation run of the multi-antenna electromagnetic field simulation model is carried out, and magnetic field distribution conditions of all points in a region when the antenna works independently are obtained; 3, electromagnetic field components of all the points in the direction X, the direction Y and the direction Z when the antennas work independently are superposed respectively, and components of compound fields of the points in the direction X, the direction Y and the direction Z are obtained; 4, the components of the compound fields of all the points in the direction X, the direction Y and the direction Z are subjected to vector synthesis, and pilot frequency multi-antenna electromagnetic field distribution is obtained. Under the circumstance of multi-antenna pilot frequency work, electromagnetic field distribution in space can be accurately calculated, and therefore the influences of space electromagnetic fields on electronic parts and people in the space can be accurately analyzed.
Description
Technical field
The invention belongs to Electromagnetic Fields ＆ Magnetic Waves technical field, calculate alien frequencies multiple antennas electromagnetism more particularly, to a kind of
The method and system of field distribution.
Background technology
Calculate antenna peripheral electromagnetic field and multiple methods are distributed with, one kind of most common of which is exactly to be imitated with electromagnetic simulation software
True calculating.And existing Ge great commercial electromagnet simulation software, such as FEKO, CST etc., calculate multiple antennas magnetic distribution when
Wait, all can only calculate the magnetic distribution in same frequency for each Antenna Operation.But in practical situations both, such as on naval vessel
Multiple antenna, they work at different frequencies simultaneously.Prior art cannot relatively accurately calculate the electromagnetism on naval vessel
Field distribution, thus electromagnetic environment on the naval vessel shadow to other electronic units and ship's staff cannot relatively accurately be studied
Ring.
Content of the invention
Defect for prior art and urgent needss, the invention provides a kind of calculate alien frequencies multiple antennas magnetic distribution
Method and system.
A kind of method calculating alien frequencies multiple antennas magnetic distribution, comprises the following steps：
(1) set up the multiple antennas electromagnetic-field simulation model of actual scene；
(2) separately simulation excitation is applied to every slave antenna, simulation frequency is set to the operating frequency of this antenna,
Simulation run multiple antennas electromagnetic-field simulation model, obtains this antenna and works independently the Distribution of Magnetic Field situation of each point in time domain；
(3) when each antenna working independently, at each point, X, Y, the electromagnetic field component in Z-direction are superimposed respectively, obtain this point
Composite Field component in the X, Y, Z direction；
(4) in the component of X, Y, Z-direction, Vector modulation is carried out to each point Composite Field, obtain alien frequencies multiple antennas electromagnetic field and divide
Cloth.
Further, the specific implementation of described step (3) is：
(3-1) appoint in the zone and take 1 point of i, according to its x, y, z coordinate, read this point electromagnetic field in the X, Y, Z direction
Component, i.e. field intensity size in X-direction | Exi| and phase place Φxi, the field intensity size in Y-direction | Eyi| and phase place Φyi, in Z-direction
Field intensity size | Ezi| and phase place Φzi, that is,
Exi=| Exi|cos(ωit+Φxi)
Eyi=| Eyi|cos(ωit+Φyi)
Ezi=| Ezi|cos(ωit+Φzi)
Wherein, i=1,2 ..., n, n are antenna amount, ωiFor angular frequency.
(3-2) component of each X in putting, Y, Z-direction is stacked up, obtain this Composite Field in the X, Y, Z direction
Component, that is,
Ex=Ex1+Ex2+...+Exn
Ey=Ey1+Ey2+...+Eyn
Ez=Ez1+Ez2+...+Ezn.
Further, the specific implementation of described step (4) is：
(4-1) to each point Composite Field the amplitude of component in the X, Y, Z direction squared and, then extraction of square root, obtain final product
Electromagnetic field field intensity size at this point
(4-2) computer azimuth tangent of an angle
(4-3) calculate pitching tangent of an angle
Further, described multiple antennas electromagnetic-field simulation model adopts appointing in electromagnetic simulation software FEKO, CST, HFSS
Meaning is a kind of to be built.
A kind of system calculating alien frequencies multiple antennas magnetic distribution, including with lower module：
Model construction module, for setting up the multiple antennas electromagnetic-field simulation model of actual scene；
Single antenna emulation module, for separately applying simulation excitation to every slave antenna, simulation frequency is set to
The operating frequency of this antenna, simulation run multiple antennas electromagnetic-field simulation model, obtain this antenna and work independently each point in time domain
Distribution of Magnetic Field situation；
Single-point magnetic field superposition module, for when each antenna is worked independently at each point X, Y, the electromagnetic field in Z-direction divide
Amount is superimposed respectively, obtains this Composite Field component in the X, Y, Z direction；
Magnetic vector synthesis module, for carrying out Vector modulation to each point Composite Field in the component of X, Y, Z-direction, obtains different
Frequency multiple antennas magnetic distribution.
Further, described single-point magnetic field superposition module includes：
Single-point magnetic field extracting sub-module, takes 1 point of i for appointing in the zone, according to its x, y, z coordinate, read this point X,
Electromagnetic field component in Y, Z-direction, i.e. field intensity size in X-direction | Exi| and phase place Φxi, the field intensity size in Y-direction | Eyi|
And phase place Φyi, the field intensity size in Z-direction | Ezi| and phase place Φzi, that is,
Exi=| Exi|cos(ωit+Φxi)
Eyi=| Eyi|cos(ωit+Φyi)
Ezi=| Ezi|cos(ωit+Φzi)
Wherein, i=1,2 ..., n, n are antenna amount, ωiFor angular frequency,.
Single-point magnetic field superposition submodule, the component for the X in putting each, Y, Z-direction stacks up, and obtains this point multiple
Close field component in the X, Y, Z direction, that is,
Ex=Ex1+Ex2+…+Exn
Ey=Ey1+Ey2+…+Eyn
Ez=Ez1+Ez2+…+Ezn.
Further, described magnetic vector synthesis module includes：
Electromagnetic field field intensity calculating sub module, the amplitude for the component in the X, Y, Z direction to each point Composite Field is squared
With, then extraction of square root, obtain final product electromagnetic field field intensity size at this point
Azimuth tangent calculating sub module, for computer azimuth tangent of an angle
Angle of pitch tangent calculating sub module, for calculating pitching tangent of an angle
Further, described multiple antennas electromagnetic-field simulation model adopts appointing in electromagnetic simulation software FEKO, CST, HFSS
Meaning is a kind of to be built.
The Advantageous Effects of the present invention are embodied in：
Under the scene of multiple antennas alien frequencies work, the electromagnetic field that the present invention can relatively accurately calculate in space divides
Cloth, such that it is able to the impact to the electronic unit in this space and personnel for the accurate analysis space electromagnetic field.
Brief description
The flow chart that Fig. 1 calculates alien frequencies multiple antennas magnetic distribution method for the present invention；
Fig. 2 is FEKO phantom schematic diagram provided in an embodiment of the present invention；
Fig. 3 for calculating the X-component of gained compound field with the present invention in the embodiment of the present invention and calculates institute with simulation software
Obtain the comparison diagram of compound field X-component；
Fig. 4 for calculating the Y-component of gained compound field with the present invention in the embodiment of the present invention and calculates institute with simulation software
Obtain the comparison diagram of compound field Y-component；
Fig. 5 for calculating the Z component of gained compound field with the present invention in the embodiment of the present invention and calculates institute with simulation software
Obtain the comparison diagram of compound field Z component；
Fig. 6 is to calculate gained compound field with the present invention in the embodiment of the present invention to calculate gained compound electric with simulation software
The comparison diagram of field；
Fig. 7 is to calculate the azimuth in gained compound field direction with the present invention in the embodiment of the present invention and use simulation software meter
Calculate the azimuth comparison diagram in gained compound field direction；
Fig. 8 is to calculate the angle of pitch in gained compound field direction with the present invention in the embodiment of the present invention and use simulation software meter
Calculate the angle of pitch comparison diagram in gained compound field direction.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, and
It is not used in the restriction present invention.As long as additionally, involved technical characteristic in each embodiment of invention described below
The conflict of not constituting each other just can be mutually combined.
The technical thought of the present invention is：Electromagnetic field at a certain position be by each electromagnetic field component by vector superposed and
Become, all of spatial electromagnetic field component is decomposed on three directions of x, y, z by the present invention, then respectively on these three directions
By important for institute addition, that is, obtain Composite Field in three square upward components of x, y, z, more just can have been obtained by the rule of Vector modulation
Size and Orientation to Composite Field.As shown in figure 1, the method that the present invention calculates alien frequencies multiple antennas magnetic distribution includes following step
Suddenly：
(1) set up the multiple antennas electromagnetic-field simulation model of actual scene.
Multiple antennas electromagnetic-field simulation model can adopt electromagnetic simulation software FEKO, CST, HFSS etc..Fig. 2 provides the present invention
One example, builds model using electromagnetic simulation software FEKO, and in model, antenna material is perfact conductor, antenna A1 operating frequency
For f1, antenna A2 operating frequency be f2, antenna length is l, Antenna Operation environment is free space, near field domain such as Fig. 2 ash
Shown in the domain of zone.
(2) separately simulation excitation is applied to every slave antenna, simulation frequency is set to the operating frequency of this antenna,
Simulation run multiple antennas electromagnetic-field simulation model, obtains this antenna and works independently the Distribution of Magnetic Field situation of each point in time domain
In above-mentioned model, only driving source is added to antenna A1, and simulation frequency is set to f1, run phantom and enter
Row simulation calculation, when obtaining antenna A1 and working independently, the field distribution situation of each point in domain.
Driving source is added to the antenna A2 in phantom, and simulation frequency is set to f2, run phantom and carry out
Simulation calculation, when obtaining antenna A2 and working independently, the field distribution situation of each point in domain.
In the manner described above, driving source is individually applied to all of antenna, simulation frequency is set to the work of this antenna
Frequency, simulation calculating obtains each antenna and works independently the Distribution of Magnetic Field situation of each point in time domain
(3) when each antenna working independently, at each point, X, Y, the electromagnetic field component in Z-direction are superimposed respectively, obtain this point
Composite Field component in the X, Y, Z direction.This step comprises following sub-step：
(3-1) appoint in domain and take a bit, take point (x0,y0,z0), according to its x, y, z coordinate, in above-mentioned steps (1-
2) in the destination file of the emulation carrying out in, read the result of calculation of this point, i.e. field intensity size in X-direction | Exi| and phase place
Φxi, the field intensity size in Y-direction | Eyi| and phase place Φyi, the field intensity size in Z-direction | Ezi| and phase place Φzi, that is,
Exi=| Exi|cos(ωit+Φxi)
Eyi=| Eyi|cos(ωit+Φyi)
Ezi=| Ezi|cos(ωit+Φzi)
Wherein, i=1,2 ..., n, n are antenna amount, ωiFor angular frequency
The component of each X in putting, Y, Z-direction is stacked up, obtain this Composite Field in the X, Y, Z direction minute
Amount, that is,
Ex=Ex1+Ex2+…+Exn
Ey=Ey1+Ey2+…+Eyn
Ez=Ez1+Ez2+…+Ezn
(4) in the component of X, Y, Z-direction, Vector modulation is carried out to each point Composite Field, obtain alien frequencies multiple antennas electromagnetic field and divide
Cloth.This step comprises following sub-step：
(4-1) by squared for the amplitude of three components and, then extraction of square root, be electromagnetic field field intensity size at this point.
I.e.
(4-2) size of Y-direction component, than the size of upper X-direction component, obtains azimuthal tangent, that is,
(4-3) X-direction component and the resultant vector size of Y-direction component, than the size of upper Z-direction component, obtain the angle of pitch
Tangent, that is,
In view of current simulation calculation software can only calculate the situation with frequency work for each antenna, verify meter of the present invention for convenience
Calculate the correctness of result, in this example, choose operating frequency f1=f2=20MHz, such that it is able to by the present invention result of calculation with
The result of calculation contrast of simulation software.As shown in table 1-3, in table, 2,3,4 are classified as solution point to the calculation result data of simulation software
Position coordinateses, 5,6 are classified as the amplitude of X-direction electric field component, phase place, and 7,8 are classified as the amplitude of Y-direction electric field component, phase place, 9,
10 are classified as the amplitude of Z-direction electric field component, phase place.
Partial electric-field data when table 1 antenna A1 works independently
Partial electric-field data when table 2 antenna A2 works independently
Table 3 compound field partial data
In the present embodiment, length l=λ/4 of two antennas, wherein λ is operation wavelength, and the spacing between two antennas is 5 λ, takes
The electric field intensity at point (- 20, -20,0.1) place, as calculating target, from the data of Fig. 3 and Fig. 4, can find in step (3)
Required data.Data is substituted into computing formula, is sequentially completed subsequent step, each step result of calculation calculates knot with simulation software
Fruit is to such as shown in Fig. 3 Fig. 8.
As it will be easily appreciated by one skilled in the art that the foregoing is only presently preferred embodiments of the present invention, not in order to
Limit the present invention, all any modification, equivalent and improvement made within the spirit and principles in the present invention etc., all should comprise
Within protection scope of the present invention.
Claims (8)
1. a kind of method calculating alien frequencies multiple antennas magnetic distribution is it is characterised in that comprise the following steps：
(1) set up the multiple antennas electromagnetic-field simulation model of actual scene；
(2) separately simulation excitation is applied to every slave antenna, simulation frequency is set to the operating frequency of this antenna, emulation
Run multiple antennas electromagnetic-field simulation model, obtain this antenna and work independently the Distribution of Magnetic Field situation of each point in time domain；
(3) when each antenna working independently, at each point, X, Y, the electromagnetic field component in Z-direction are superimposed respectively, obtain this point and are combined
Field component in the X, Y, Z direction；
(4) in the component of X, Y, Z-direction, Vector modulation is carried out to each point Composite Field, obtain alien frequencies multiple antennas magnetic distribution.
2. a kind of method calculating alien frequencies multiple antennas magnetic distribution according to claim 1 is it is characterised in that described step
Suddenly the specific implementation of (3) is：
(3-1) appoint in the zone and take 1 point of i, according to its x, y, z coordinate, read this point electromagnetic field component in the X, Y, Z direction,
I.e. field intensity size in X-direction | Exi| and phase place Φxi, the field intensity size in Y-direction | Eyi| and phase place Φyi, the field in Z-direction
Powerful little | Ezi| and phase place Φzi, that is,
Exi=| Exi|cos(ωit+Φxi)
Eyi=| Eyi|cos(ωit+Φyi)
Ezi=| Ezi|cos(ωit+Φzi)
Wherein, i=1,2 ..., n, n are antenna amount, ωiFor angular frequency.
(3-2) component of each X in putting, Y, Z-direction is stacked up, obtain this Composite Field in the X, Y, Z direction minute
Amount, that is,
Ex=Ex1+Ex2+...+Exn
Ey=Ey1+Ey2+...+Eyn
Ez=Ez1+Ez2+...+Ezn.
3. a kind of method calculating alien frequencies multiple antennas magnetic distribution according to claim 2 is it is characterised in that described step
Suddenly the specific implementation of (4) is：
(4-1) to each point Composite Field the amplitude of component in the X, Y, Z direction squared and, then extraction of square root, obtain final product this point
Place's electromagnetic field field intensity size
(4-2) computer azimuth tangent of an angle
(4-3) calculate pitching tangent of an angle
4. a kind of calculating alien frequencies multiple antennas magnetic distribution according to claim 1 or 2 or 3 method it is characterised in that
Described multiple antennas electromagnetic-field simulation model adopts any one structure in electromagnetic simulation software FEKO, CST, HFSS.
5. a kind of system calculating alien frequencies multiple antennas magnetic distribution is it is characterised in that include with lower module：
Model construction module, for setting up the multiple antennas electromagnetic-field simulation model of actual scene；
Single antenna emulation module, for separately applying simulation excitation to every slave antenna, simulation frequency is set to this sky
The operating frequency of line, simulation run multiple antennas electromagnetic-field simulation model, obtain this antenna and work independently the magnetic of each point in time domain
Field distribution situation；
Single-point magnetic field superposition module, for when each antenna is worked independently at each point X, Y, the electromagnetic field component in Z-direction divide
It is not superimposed, obtain this Composite Field component in the X, Y, Z direction；
Magnetic vector synthesis module, for carrying out Vector modulation to each point Composite Field in the component of X, Y, Z-direction, obtains alien frequencies many
Electromagnetic Fields of Antenna is distributed.
6. a kind of system calculating alien frequencies multiple antennas magnetic distribution according to claim 5 is it is characterised in that described list
Point magnetic field superposition module includes：
Single-point magnetic field extracting sub-module, takes 1 point of i for appointing in the zone, according to its x, y, z coordinate, reads this point in X, Y, Z
Electromagnetic field component on direction, i.e. field intensity size in X-direction | Exi| and phase place Φxi, the field intensity size in Y-direction | Eyi| and
Phase place Φyi, the field intensity size in Z-direction | Ezi| and phase place Φzi, that is,
Exi=| Exi|cos(ωit+Φxi)
Eyi=| Eyi|cos(ωit+Φyi)
Ezi=| Ezi|cos(ωit+Φzi)
Wherein, i=1,2 ..., n, n are antenna amount, ωiFor angular frequency,.
Single-point magnetic field superposition submodule, the component for the X in putting each, Y, Z-direction stacks up, and obtains this Composite Field
Component in the X, Y, Z direction, that is,
Ex=Ex1+Ex2+...+Exn
Ey=Ey1+Ey2+...+Eyn
Ez=Ez1+Ez2+...+Ezn.
7. a kind of system calculating alien frequencies multiple antennas magnetic distribution according to claim 6 is it is characterised in that described magnetic
Field vector synthesis module includes：
Electromagnetic field field intensity calculating sub module, for the component in the X, Y, Z direction to each point Composite Field amplitude squared and, so
Extraction of square root afterwards, obtains final product electromagnetic field field intensity size at this point
Azimuth tangent calculating sub module, for computer azimuth tangent of an angle
Angle of pitch tangent calculating sub module, for calculating pitching tangent of an angle
8. a kind of calculating alien frequencies multiple antennas magnetic distribution according to claim 5 or 6 or 7 system it is characterised in that
Described multiple antennas electromagnetic-field simulation model adopts any one structure in electromagnetic simulation software FEKO, CST, HFSS.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111209663A (en) * | 2019-12-31 | 2020-05-29 | 华中科技大学 | Modeling analysis method and system for equivalent ultra-long wave antenna array of high-voltage power grid |
| CN113158605A (en) * | 2021-03-10 | 2021-07-23 | 南京工程学院 | SiC MOSFET near-zone electromagnetic field modeling method |
| CN113435144A (en) * | 2021-06-29 | 2021-09-24 | 中国电子科技集团公司第五十四研究所 | Far-field data interaction method from Siwave to CST |
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|---|---|---|---|---|
| CN111209663A (en) * | 2019-12-31 | 2020-05-29 | 华中科技大学 | Modeling analysis method and system for equivalent ultra-long wave antenna array of high-voltage power grid |
| CN113158605A (en) * | 2021-03-10 | 2021-07-23 | 南京工程学院 | SiC MOSFET near-zone electromagnetic field modeling method |
| CN113158605B (en) * | 2021-03-10 | 2024-02-13 | 南京工程学院 | SiC MOSFET near-zone electromagnetic field modeling method |
| CN113435144A (en) * | 2021-06-29 | 2021-09-24 | 中国电子科技集团公司第五十四研究所 | Far-field data interaction method from Siwave to CST |
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