CN102386983B - Reversely deducing prediction method of electromagnetic coupling between large array antennae of ship - Google Patents

Abstract

The invention provides a reversely deducing prediction method of electromagnetic coupling between large array antennae of a ship. According to an electromagnetic coupling theory of a transmitting array antenna to array elements of a receiving array antenna, a full-wave electromagnetic model is built for a transmitting array antenna model machine and a receiving array element antenna, and premixing simulation solving is carried out on a coupling field of the transmitting array antenna model machine by adopting a consistency diffraction theory and a vector overlaying method on the basis of an amplitude-phase combination theory; an electromagnetic coupling test on a local array antenna is carried out in an open area test site, result of the electromagnetic coupling test on the local array antenna is compared and verified with a network parameter model, and a quantizing factor under an actual condition is used for correcting an interference field propagation model to ensure that simulation calculation is matched with the test result. The method provided by the invention gives play to the accuracy advantage of a full-wave numerical method, and provides an interface for simulation test correction, and the problem of overdesign or underdesign caused by the simulation calculation carried out under an ideal state is solved by reversely deducing.

Description

The anti-Forecasting Methodology of spreading out of electromagnetic coupled between boats and ships large-sized array array antenna

Technical field

The invention belongs to the prediction of boats and ships plateform system level electromagnetic compatible and design field, relate in particular to the large-sized array array antenna electromagnetic compatibility Tangent Model layout designs under the integrated state of a kind of boats and ships radio frequency.

Background technology

Being installed in ship superstructure on the large-sized array array antenna of organizing difference in functionality is conformal more, can realizing the integrated flexible allotment of powerful radio-frequency enabled and radio frequency resource, is the principal mode of boats and ships radio frequency integrated technology, also is the inexorable trend of boats and ships radio-frequency technique development.Yet because the shipboard array antenna transmitting power is large, working band is wide, the compact arrangement of many group patterns antenna can cause serious each other electromagnetic coupled interference, must instruct and support optimizing distribution of array antenna by Accurate Prediction in the design phase.

At present, the prediction of pair array field of antenna electromagnetic coupled mainly comprises two kinds of methods in the design phase: simulation calculation and analogue test.Remain in following problem and can't solve:

(1) simulation calculation mainly adopts the all-wave numerical method, need to carry out the full size grid to simulation object disperses, calculate for electromagnetic coupled between boats and ships large-sized array array antenna, the extensive phase array of several thousand array elements can generate several hundred million grids when discrete, if consider the Ship Structure of the long size of super large electric wave, unknown number quantity will exceed the ability of finding the solution of present most advanced computer, and solving equations can't be restrained.Therefore, numerical method only is applied to the small array antenna self electromagnetism coupling prediction of hundred magnitude array element quantity.

(2) in the development and design stage, still do not possess and utilize complete large-sized array array antenna to carry out the condition of mutual electromagnetic coupled analogue test, only can utilize partial array antenna model machine.Partial array antenna model machine is all different from array element quantity and the beam directional of complete array antenna, has non-linear factor, utilizes can't accurately convert electromagnetic coupled data between complete large-sized array array antenna of electromagnetic coupled test data between the partial array antenna.Therefore, only adopt simulation experiment method to there is no electromagnetic coupled feature between method prediction boats and ships large-sized array array antenna.

The retrieval domestic and foreign literature, the electromagnetic coupled Forecasting Methodology still belongs to blank between boats and ships large-sized array array antenna.

Summary of the invention

The technical problem to be solved in the present invention is: the anti-Forecasting Methodology of spreading out of electromagnetic coupled between a kind of boats and ships large-sized array array antenna is provided, be applicable to the design of optimizing distribution of boats and ships platform large-sized array array antenna electromagnetic compatibility, and not limited by array element quantity, Ship Structure constraint and appointed condition.

The anti-Forecasting Methodology of spreading out of electromagnetic coupled between boats and ships large-sized array array antenna, it is characterized in that: it may further comprise the steps:

1) makes partial array antenna model machine according to the type of boats and ships large-sized array array antenna, partial array antenna model machine is divided into emission array antenna model machine and receiving array antenna model machine, emission array antenna model machine is comprised of emission array-element antenna and emitting module thereof, and the receiving array antenna model machine forms by receiving array-element antenna and receiving unit thereof; Local array antenna model machine is set up all-wave Electromagnetic Simulation model;

Build according to demand ship superstructure simulation steel construction, the simulation steel construction is simulation model or realistic model;

2) dominant frequency frequency spectrum and the out of band spectrum of the emitting module output of each emission array-element antenna in the test emission array antenna model machine, obtain emitting module output frequency and voltage data, as launching the array-element antenna excitation parameters to all-wave Electromagnetic Simulation model assignment, calculate mutual impedance between the surface current density of each emission array-element antenna in the emission array antenna model machine and array-element antenna with moment method, further try to achieve the radiation field of each emission array-element antenna; Introduce the consistency diffraction theory and set up the radiation field propagation model, change integral equation into system of linear equations, adopt the vector superposed emission array antenna model machine of finding the solution in direct projection field, mirror field and the diffraction field on superstructure surface;

3) emission array antenna model machine and single reception array-element antenna are installed on superstructure simulation steel construction outer wall surface, the radiation field of test emission array antenna model machine, the reflection that quantitative analysis superstructure simulation steel construction outer wall surface causes and diffraction are on the impact of electromagnetic coupled, verification emission array radiation field of aerial propagation model;

4) the receiving array antenna model machine on average is divided into four subarrays, mode with single reception array element, single subarray and subarray combination receives respectively, obtain when receiving array element and subarray quantity and increasing progressively, dominant frequency and the outer coupling of band level are at the Changing Pattern of radio-frequency (RF) output end, the correlation models that set up and receive array element, receives subarray quantity and electromagnetic coupled voltage;

Mutual impedance between the emission array-element antenna of trying to achieve 5) employing step 2) makes up complete large-scale emission array aerial radiation model; Adopt step 3) in the radiation field propagation model make up and verification emission array-element antenna and reception array-element antenna between based on the mutual resistance matrix function of multiport network, try to achieve the coupling coefficient between emission array-element antenna and the reception array-element antenna, adopt vector superposed principle to try to achieve complete large-scale emission array antenna to receiving the coupled voltages of array element; Adopt step 4) the middle correlation models that receives array element, receives subarray quantity and electromagnetic coupled voltage, try to achieve complete large-scale emission array radiation field of aerial to the electromagnetic coupled voltage of complete large-scale receiving array antenna.

Press such scheme, described step 1) partial array antenna model machine is the principle antenna equipment that the complete array antenna is developed in design process, the array-element antenna quantity that comprises is generally below 1/20th of complete array bay quantity, be mainly used in the system-level test of design phase, the operation principle of partial array antenna model machine and complete array antenna is basic identical, but partial array antenna model machine is than the easier manufacturing of complete array antenna, repeated disassembled and assembled and movement during more convenient test.

Press such scheme, described step 2) tests emission spectrum at the emitting module delivery outlet of each array-element antenna of emission array antenna, cause the out of band spectrum component to be made an uproar when flooding the end of by when the dominant frequency energy is excessive, carrying out dominant frequency suppresses or filtering, extracting the out of band spectrum component, and then provide excitation parameters for the array-element antenna simulation model.The broadband noise of making an uproar and cause for dominant frequency in the described end.

Press such scheme, described step 3) with array, the array element coupling spectrum signature of signal analyzer test receiving array antenna model machine, and the installation site of replacing receiving array antenna, extract different coupling path structures, different frequency to the quantization influence factor of electromagnetic coupled, verification emission array radiation field of aerial propagation model.

Press such scheme, described step 4) when utilizing single array-element antenna to test reception, press the receiving array antenna polarization mode and arrange the reception array-element antenna, emission array antenna transmission horizontal beam, and when the test tape external spectrum, use the dominant frequency filter.

Emitting module is the RF excited module of array-element antenna.

Some work principle of the present invention is: to an emission array antenna A who comprises N array element, feedback end port driving voltage and electric current satisfy following formula:

$\left[\begin{array}{c}{V}_1\\ {\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HDA0000099333940000021.png"\; state="\{\{state\}\}">V</figure-callout>}}_2\\ .\\ .\\ .\\ V_N\end{array}\right]=\left[\begin{array}{cccc}{Z}_{11}& Z_{12}& ...& Z_{1N}\\ Z_{21}& Z_{22}& ...& Z_{2N}\\ .& .& .& .\\ .& .& .& .\\ .& .& .& .\\ Z_{N1}& {\mathrm{<figure-callout\; id="2"\; label="Z\; N"\; filenames="HDA0000099333940000021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_N& ...& Z_{\mathrm{NN}}\end{array}\right]\left[\begin{array}{c}{I}_1\\ I_2\\ .\\ .\\ .\\ I_N\end{array}\right]---\left(1\right),$

The driving voltage V in formula (1) left side ₁... V _NBe plural number, comprised amplitude and the phase place of driving voltage, wherein, the amplitude of driving voltage obtains by measuring at the emitting module delivery outlet, and the phase place of driving voltage obtains by the directivity of test dominant frequency, harmonic wave, dominant frequency band stray; Z _IjBe mutual resistance matrix Z _AIn element, i and j are any two array-element antenna among the array antenna A, I _i... I _NBe the array-element antenna port current;

To a receiving array antenna B who comprises the individual array element of N ', feedback end port driving voltage and electric current satisfy following formula:

$\left[\begin{array}{c}{V}_{1^{\&prime;}}\\ {\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HDA0000099333940000021.png"\; state="\{\{state\}\}">V</figure-callout>}}_{2^{\&prime;}}\\ .\\ .\\ .\\ V_{N^{\&prime;}}\end{array}\right]=\left[\begin{array}{cccc}{\mathrm{<figure-callout\; id="1"\; label="Z"\; filenames="HDA0000099333940000013.png,HDA0000099333940000021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_{1^{\&prime;}{1}^{\&prime;}}& {\mathrm{<figure-callout\; id="1"\; label="Z"\; filenames="HDA0000099333940000013.png,HDA0000099333940000021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_{1^{\&prime;}{2}^{\&prime;}}& ...& Z_{1^{\&prime;}{N}^{\&prime;}}\\ Z_{2^{\&prime;}{1}^{\&prime;}}& Z_{2^{\&prime;}{2}^{\&prime;}}& ...& Z_{2^{\&prime;}{N}^{\&prime;}}\\ .& .& .& .\\ .& .& .& .\\ .& .& .& .\\ Z_{N^{\&prime;}{1}^{\&prime;}}& Z_{N^{\&prime;}{2}^{\&prime;}}& ...& Z_{N^{\&prime;}{N}^{\&prime;}}\end{array}\right]\left[\begin{array}{c}{I}_{1^{\&prime;}}\\ I_{2^{\&prime;}}\\ .\\ .\\ .\\ I_{N^{\&prime;}}\end{array}\right]---\left(2\right),$

V in the formula (2) _{1 '}... V _{N '}Be driving voltage, Z _{I ' j '}Be mutual resistance matrix Z _BIn element, i ' and j ' are any two array-element antenna among the array antenna B, I _{1 '}... I _{N '}Be the array-element antenna port current; When two array antennas existed simultaneously, existence interacted, and the network paramter models in the formula (1) is presented the end port fill, and driving voltage and electric current satisfy following formula:

Impedance matrix in the following formula can be expressed as with matrix in block form

$\left[\begin{array}{cc}P& Q\\ S& T\end{array}\right]---\left(4\right),$

Wherein P is the mutual resistance matrix between array antenna A port, and Q is array antenna A to the mutual resistance matrix of B (A emission, B receives), S be array antenna B to the mutual resistance matrix of A (B emission, A receives), T is the mutual resistance matrix between array antenna B port.Because the reciprocity of port has S=Q.

Mutual resistance matrix Z _AIn element Z _IjBe the mutual impedance of any two array-element antenna i, j feedback end port among the transmitting-receiving array antenna A, its formula is

$Z_{\mathrm{ij}}=\frac{-1}{I_i{I}_j}\&Integral;\&Integral;\&Integral;E^i\&CenterDot;J^j\mathrm{dV}---\left(5\right),$

E ⁱBe the electric field along array-element antenna j that array-element antenna i produces, J ^jSurface current for array-element antenna j; I _iAnd I _jBe respectively the feedback end electric current of array-element antenna i and j; As i and j during not at same array antenna, E ⁱConsider the impact of diffraction, reflection etc., comprise and introduce the resulting coupling path quantization influence factor of test;

After trying to achieve impedance matrix according to formula (5), can try to achieve the current response of each array element port of disturbed array antenna:

On this basis, adopt counter the spreading out of following methods to find the solution: definition S _AiBe the coupling coefficient of i array-element antenna of array antenna A pair array antenna B, S _AiComputing formula is:

$S_{\mathrm{Ai}}=\underset{n\&Element;A}{\mathrm{\&Sigma;}}{S}_{\mathrm{ni}}{c}_n---\left(7\right),$

$\underset{n\&Element;A}{\mathrm{\&Sigma;}}{\left|c_n\right|}^2=1---\left(8\right),$

In formula (7), (8), n is the radiation array element numbering of array A, S _NiBe the coupling coefficient of array antenna A n array element and array antenna B i array element,

Be respectively incident wave amplitude and the phase place of n array element of array antenna A, formula (8) is to c _nCarried out normalized;

The normalization ripple of the actual coupling of array antenna A pair array antenna B i array element is:

$S_{\mathrm{Ai}}=\underset{n\&Element;A}{\mathrm{\&Sigma;}}{S}_{\mathrm{ni}}{a}_n---\left(9\right),$

a _nBe the normalized incident-wave of n unit of array antenna A, i array element of array antenna A pair array antenna B is at the voltage V of reality coupling _AiAnd electric current I _AiBe respectively:

$V_{\mathrm{Ai}}=s_{\mathrm{Ai}}\&CenterDot;\sqrt{Z_0}---\left(10\right),$

$I_{\mathrm{Ai}}=s_{\mathrm{Ai}}/\sqrt{Z_0}---\left(11\right),$

Z in formula (10), (11) ₀For receiving the characteristic impedance of array-element antenna;

In the receive path of array antenna B, the reception signal of array element has been carried out weighting, the actual voltage of receiving of submatrix is:

N ' is the array element quantity of array antenna B, k _i,

Be respectively amplitude and the phase weighting coefficient of i array element receive path.

Beneficial effect of the present invention is:

1, both brought into play the accuracy advantage of all-wave numerical method, proofreading and correct for analogue test again provides interface, by counter spread out to calculate to have solved carry out the mistake that simulation calculation causes under the perfect condition and design or owe design problem.

2, the electromagnetic coupled that adopts array element level all-wave numerical method and array class multiport network parameter matrix to carry out between boats and ships large-sized array array antenna is found the solution, complete computation influencing each other and electromagnetic coupled between the thousands of array elements of large-sized array array antenna, solved that independent use full wave method calculation scale is little, the difficult problem of array element limited amount.

Description of drawings

Fig. 1 is flow chart of the present invention.

Fig. 2 is the particular flow sheet of one embodiment of the invention.

Fig. 3 is that emitting module is as the equivalent electric circuit of driving source.

Fig. 4 is that receiving unit is as the equivalent electric circuit of load.

Fig. 5 is the anti-solving precision correlation curve that spreads out of electromagnetic coupled between complete large-scale emission array antenna.

Embodiment

Design philosophy of the present invention as shown in Figure 1,1) theoretical to the electromagnetic coupled of receiving array antenna array element according to the emission array antenna, to emission array antenna model machine with receive array-element antenna and set up the all-wave electromagnetic model, and adopt the consistency diffraction theory and be combined to theoretical vector superposed method based on the width of cloth and the coupled field of emission array antenna model machine is pre-mixed emulation finds the solution; The electromagnetic coupled of 2) carrying out the partial array antenna at open test site is tested, electromagnetic coupled result of the test and network paramter models contrast verification with the partial array antenna, with the quantizing factor correction interference field propagation model under the physical condition, match to guarantee simulation calculation and result of the test; The test of described electromagnetic coupled comprises between emission array antenna model machine and the receiving array antenna model machine and emission array antenna model machine is tested with the electromagnetic coupled between the reception array-element antenna; 3) employing is tested the excitation parameters of acquisition and based on the mutual resistance matrix function model of multiport network counter the spreading out of electromagnetic coupled between the large-sized array array antenna is found the solution.

The anti-Forecasting Methodology of spreading out of electromagnetic coupled may further comprise the steps between boats and ships large-sized array array antenna:

1) makes partial array antenna model machine according to the type of boats and ships large-sized array array antenna, partial array antenna model machine is divided into emission array antenna model machine and receiving array antenna model machine, emission array antenna model machine is comprised of emission array-element antenna and emitting module thereof, and the receiving array antenna model machine forms by receiving array-element antenna and receiving unit thereof; Local array antenna model machine is set up all-wave Electromagnetic Simulation model; Partial array antenna model machine is the principle antenna equipment that the complete array antenna is developed in design process, and the array-element antenna quantity that comprises is below 1/20th of complete array bay quantity.

Build according to demand ship superstructure simulation steel construction, the simulation steel construction is simulation model or realistic model.

2) dominant frequency frequency spectrum and the out of band spectrum of the emitting module output of each emission array-element antenna in the test emission array antenna model machine, obtain emitting module output frequency and voltage data, as launching the array-element antenna excitation parameters to all-wave Electromagnetic Simulation model assignment, calculate mutual impedance between the surface current density of each emission array-element antenna in the emission array antenna model machine and array-element antenna with moment method, further try to achieve the radiation field of each emission array-element antenna; Introduce the consistency diffraction theory and set up the radiation field propagation model, change integral equation into system of linear equations, adopt the vector superposed emission array antenna model machine of finding the solution in direct projection field, mirror field and the diffraction field on superstructure surface.

Emitting module delivery outlet test emission spectrum in each array-element antenna of emission array antenna, cause the out of band spectrum component to be made an uproar when flooding the end of by when the dominant frequency energy is excessive, carry out that dominant frequency suppresses or filtering, extracting the out of band spectrum component, and then provide excitation parameters for the array-element antenna simulation model.

3) emission array antenna model machine and single reception array-element antenna are installed on superstructure simulation steel construction outer wall surface, the radiation field of test emission array antenna model machine, the reflection that quantitative analysis superstructure simulation steel construction outer wall surface causes and diffraction are on the impact of electromagnetic coupled, verification emission array radiation field of aerial propagation model.

Array, array element coupling spectrum signature with signal analyzer test receiving array antenna model machine, and the installation site of replacing receiving array antenna, extract different coupling path structures, different frequency to the quantization influence factor of electromagnetic coupled, verification emission array radiation field of aerial propagation model.The coupling path structure is usually chosen chamfering and is blocked etc. and may have the larger special construction of impact, and frequency is selected typical frequencies according to actual conditions.

4) the receiving array antenna model machine on average is divided into four subarrays, mode with single reception array element, single subarray and subarray combination receives respectively, obtain when receiving array element and subarray quantity and increasing progressively, dominant frequency and the outer coupling of band level are at the Changing Pattern of radio-frequency (RF) output end, the correlation models that set up and receive array element, receives subarray quantity and electromagnetic coupled voltage.

When utilizing single array-element antenna to test reception, press the receiving array antenna polarization mode and arrange the reception array-element antenna, emission array antenna transmission horizontal beam, and when the test tape external spectrum, use the dominant frequency filter.

Mutual impedance between the emission array-element antenna of trying to achieve 5) employing step 2) makes up complete large-scale emission array aerial radiation model; Adopt step 3) in the radiation field propagation model make up and verification emission array-element antenna and reception array-element antenna between based on the mutual resistance matrix function of multiport network, try to achieve the coupling coefficient between emission array-element antenna and the reception array-element antenna, adopt vector superposed principle to try to achieve complete large-scale emission array antenna to receiving the coupled voltages of array element; Adopt step 4) the middle correlation models that receives array element, receives subarray quantity and electromagnetic coupled voltage, try to achieve complete large-scale emission array radiation field of aerial to the electromagnetic coupled voltage of complete large-scale receiving array antenna.

Fig. 2 is the particular flow sheet of one embodiment of the invention.

(1) sets up emission array antenna model machine and the receiving array antenna model machine all-wave Electromagnetic Simulation model respectively comprise 300 emission array-element antenna (array element quantity be complete large-sized array array antenna 1/20th), change integral equation into system of linear equations.Dominant frequency frequency spectrum, harmonic spectrum and the band stray frequency spectrum of the different emitting modules of test emission array antenna model machine, obtain emitting module frequency and voltage sample data and encourage as array-element antenna, calculate the current density on port current and array-element antenna surface with moment method.

(2) emission array antenna model machine is decomposed into comprises driving source, transmission line, array-element antenna.Driving source comprises internal resistance Z _g, in excitation port A, B position, emitting module is as the driving source of antenna 1, and internal resistance is Z _g=50 Ω, antenna are considered as two terminal impedances, as the load Z of transmission line ₀, as shown in Figure 3; In the receive path, receiving unit is as the reception load of antenna 1, and internal resistance also is Z _L=50 Ω, as shown in Figure 4.The transmitting/receiving assembly of 50 Ω and characteristic impedance Z ₀The transmission line of=50 Ω links to each other, calculate mutual impedance characteristic between the emission array-element antenna, further try to achieve the radiation field of each emission array-element antenna, determine the coupling direction and find the solution the radiation field of each emission array-element antenna according to the consistency diffraction theory, when adopting the vector superposed method that is combined to based on the width of cloth to obtain the emission of emission array antenna model machine in direct projection field, mirror field and the diffraction field on superstructure surface.

(3) use respectively single reception array-element antenna and receiving array antenna model machine as reception antenna, on the adherent diverse location that is arranged in the superstructure outer wall construction.When utilizing single reception array-element antenna to test reception, polarization mode by actual receiving array antenna is arranged array-element antenna, the emission array antenna model machine emission level wave beam (angle of pitch 0 degree, azimuth 0 is spent), and when test harmonic spectrum and band stray frequency spectrum, use the dominant frequency filter.Quantitative analysis outer wall and deck reflection, glancing incidence and edge diffraction are on the impact of electromagnetic coupled, and the radiation field propagation model of correct transmission array antenna model machine carries out parametric compensation to theoretical model.

(4) will launch the partial array antenna partition is four subarrays, carry out the emission of multi-beam angle in the mode of single subarray and subarray combination respectively, when research emission array quantity constantly increases progressively, the width of cloth of dominant frequency, harmonic wave and band stray is combined to rule, sets up the correlation models of emission array element quantity and coupled voltages.

(5) adopt the mutual impedance the Theory Construction to comprise the complete large-sized array array antenna emission space spectrum signature model of 6000 array elements and the coupling model of complete large-sized array array antenna.Set up between emission array-element antenna and the reception array-element antenna mutual resistance matrix function based on multiport network, with receiving array antenna center array element and simultaneously modeling of array element on every side, obtain electromagnetic coupled voltage between the complete large-scale front under center array element port current and consideration center array element and the condition of array element mutual impedance on every side.

Fig. 5 is the anti-solving precision correlation curve that spreads out of electromagnetic coupled between complete large-scale emission array antenna, and wherein counter spreading out predicts the outcome with the measured result compare error less than 3dB, can satisfy the engineering design demand.

Claims (5)

1. the anti-Forecasting Methodology of spreading out of electromagnetic coupled between boats and ships large-sized array array antenna, it is characterized in that: it may further comprise the steps:

1) makes partial array antenna model machine according to the type of boats and ships large-sized array array antenna, partial array antenna model machine is divided into emission array antenna model machine and receiving array antenna model machine, emission array antenna model machine is comprised of emission array-element antenna and emitting module thereof, and the receiving array antenna model machine forms by receiving array-element antenna and receiving unit thereof; Local array antenna model machine is set up all-wave Electromagnetic Simulation model;

Build according to demand ship superstructure simulation steel construction, the simulation steel construction is simulation model or realistic model;

2) dominant frequency frequency spectrum and the out of band spectrum of the emitting module output of each emission array-element antenna in the test emission array antenna model machine, obtain emitting module output frequency and voltage data, as launching the array-element antenna excitation parameters to all-wave Electromagnetic Simulation model assignment, calculate mutual impedance between the surface current density of each emission array-element antenna in the emission array antenna model machine and array-element antenna with moment method, further try to achieve the radiation field of each emission array-element antenna; Introduce the consistency diffraction theory and set up the radiation field propagation model, change integral equation into system of linear equations, adopt the vector superposed emission array antenna model machine of finding the solution in direct projection field, mirror field and the diffraction field on superstructure surface;

3) emission array antenna model machine and single reception array-element antenna are installed on superstructure simulation steel construction outer wall surface, the radiation field of test emission array antenna model machine, the reflection that quantitative analysis superstructure simulation steel construction outer wall surface causes and diffraction are on the impact of electromagnetic coupled, verification emission array radiation field of aerial propagation model;

4) the receiving array antenna model machine on average is divided into four subarrays, mode with single reception array element, single subarray and subarray combination receives respectively, obtain when receiving array element and subarray quantity and increasing progressively, dominant frequency and the outer coupling of band level are at the Changing Pattern of radio-frequency (RF) output end, the correlation models that set up and receive array element, receives subarray quantity and electromagnetic coupled voltage;

Mutual impedance between the emission array-element antenna of trying to achieve 5) employing step 2) makes up complete large-scale emission array aerial radiation model; Adopt radiation field propagation model in the step 3) to make up and verification emission array-element antenna and reception array-element antenna between based on the mutual resistance matrix function of multiport network, try to achieve the coupling coefficient between emission array-element antenna and the reception array-element antenna, adopt vector superposed principle to try to achieve complete large-scale emission array antenna to receiving the coupled voltages of array element; Adopt the correlation models that receives array element in the step 4), receives subarray quantity and electromagnetic coupled voltage, try to achieve complete large-scale emission array radiation field of aerial to the electromagnetic coupled voltage of complete large-scale receiving array antenna.

2. the anti-Forecasting Methodology of spreading out of electromagnetic coupled between boats and ships large-sized array array antenna according to claim 1, it is characterized in that: described step 1) partial array antenna model machine is the principle antenna equipment that the complete array antenna is developed in design process, and the array-element antenna quantity that comprises is below 1/20th of complete array bay quantity.

3. the anti-Forecasting Methodology of spreading out of electromagnetic coupled between boats and ships large-sized array array antenna according to claim 1, it is characterized in that: described step 2) test emission spectrum at the emitting module delivery outlet of each array-element antenna of emission array antenna, cause the out of band spectrum component to be made an uproar when flooding the end of by when the dominant frequency energy is excessive, carrying out dominant frequency suppresses or filtering, extracting the out of band spectrum component, and then provide excitation parameters for the array-element antenna simulation model.

4. the anti-Forecasting Methodology of spreading out of electromagnetic coupled between boats and ships large-sized array array antenna according to claim 1, it is characterized in that: described step 3) also comprises array, the array element coupling spectrum signature with signal analyzer test receiving array antenna model machine, and the installation site of replacing receiving array antenna, extract different coupling path structures, different frequency to the quantization influence factor of electromagnetic coupled, verification emission array radiation field of aerial propagation model.

5. the anti-Forecasting Methodology of spreading out of electromagnetic coupled between boats and ships large-sized array array antenna according to claim 1, it is characterized in that: described step 4) is when utilizing single array-element antenna to test reception, press the receiving array antenna polarization mode and arrange the reception array-element antenna, emission array antenna transmission horizontal beam, and when the test tape external spectrum, use the dominant frequency filter.

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