CN106483388A - A kind of detection means of the hardened structure radiation-emitting intensity of line and determination method - Google Patents
A kind of detection means of the hardened structure radiation-emitting intensity of line and determination method Download PDFInfo
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- CN106483388A CN106483388A CN201611049759.4A CN201611049759A CN106483388A CN 106483388 A CN106483388 A CN 106483388A CN 201611049759 A CN201611049759 A CN 201611049759A CN 106483388 A CN106483388 A CN 106483388A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
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- General Physics & Mathematics (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention discloses a kind of detection means of the hardened structure radiation-emitting intensity of line and determination method, including being arranged at semi-anechoic chamber（3）Interior test desk（4）, the test desk（4）Upper tiling has metallic plate（6）, the test desk（4）Upper horizontal is provided with single cable（7）, the cable（7）Top port and Network Analyzer（8）Port one connect, the cable（7）Terminal prot pass through shorting stub（9）With the metallic plate（6）It is connected；The cable（7）And metallic plate（6）The hardened structure of composition line, biconical antenna（10）Receive the radiation of the hardened structure of the line, the biconical antenna（10）Output port directly export transmission coefficient or with the Network Analyzer（8）Port two connect.A kind of detection means of the hardened structure radiation-emitting intensity of line that the present invention is provided and determination method, apparatus structure is simple, measurement result true and accurate.
Description
Technical field
The present invention relates to a kind of detection means of the hardened structure radiation-emitting intensity of line and determination method, belong to electromagnetism and
Hold technical field.
Background technology
Among conventional electromagnetic compatibility detection at present and EMC Design, the hardened structure of line is present wherein in a large number.For example
MIL-STD461F is with regard to being often related to the hardened structure of line in all kinds of detections of Devices to test.And this kind of structure is electronic equipment low
Frequency range（30MHz-200MHz）One of exceeded principal element of electromagnetic radiation.Therefore the radiation-emitting intensity of the hardened structure of line can be to whole
The electromagnetic radiation performance of system produces potential impact, even results in the exceeded situation of system radiation-emitting intensity, therefore, to line
The research and analysis of hardened structure radiation-emitting intensity are very important.
Among common electronic equipment and EMC Design, line plate radiator structure is often met.In order to line plate
The radiation-emitting intensity of structural radiation body is analyzed.For the common method of testing of the hardened structure radiation-emitting intensity of line be one
Under the driving of fixed power signal, the reception antenna using the hardened structure of range line is strong to measure the electromagnetic radiation which gives off
Degree.But, the measurement of the method is related to numerous test equipment such as EMI receiver, test result receive environmental factor and
The impact of test equipment, is easy to produce error.
Content of the invention
The technical problem to be solved is to provide a kind of detection means of the hardened structure radiation-emitting intensity of line, should
Apparatus structure is simple, measurement result true and accurate；Further, the present invention provides a kind of inspection of the hardened structure radiation-emitting intensity of line
Cls analysis method, the method are emulated using two-port network and actual test, and then strong to the hardened structure radiation-emitting of line
Degree is analyzed, and this method simplifies the complexity of test, while the error that conventional method EMI is received in test can be reduced,
Improve the accuracy to the hardened structure EMI radiation emissive porwer analysis of line.
For solving above-mentioned technical problem, the technical solution used in the present invention is：
A kind of detection means of the hardened structure radiation-emitting intensity of line, including the test desk being arranged in semi-anechoic chamber, the survey
Tiling on examination table has metallic plate, and the test desk upper horizontal is provided with single cable, the top port of the cable and network
The port one of analyzer connects, and the terminal prot of the cable is connected with the metallic plate by shorting stub；The cable and gold
The hardened structure of category plate composition line, biconical antenna receive the radiation of the hardened structure of the line, and the output port of the biconical antenna is directly defeated
Go out transmission coefficient or be connected with the port two of the Network Analyzer.
The hardened structure of the line is with ground by some grounding coppers.
The output port of the top port of the cable and the biconical antenna is all by coaxial line and the network analysis
Instrument is connected.
Absorbing material is provided with the wall of the semi-anechoic chamber.
The hardened structure of the line is the hardened structure of single line line.
The cable using 1.3 m of length copper cash, the Cable radius R be 1.32mm, cable top port and
Add the discrete port of 50 Ω between metallic plate；The shorting stub is for being vertically arranged and being highly 5cm；In the vertical of the cable
Bisector, places the bipyramid with cable level at a distance of 1m and at the position of 1.2 m of semi-anechoic chamber Metal ground
Antenna.
The Network Analyzer is Agilent portable network analyzer.
Cable top port is connected with port one by standard sub-miniature A connector.
A kind of determination method of the hardened structure radiation-emitting intensity of line, comprises the following steps：
S01, is believed using driving of the discrete port of 50 Ω as the hardened structure of line is added between cable top port and metallic plate
Number port, sets up full-wave simulation model the port record full-wave simulation using the discrete port of 50 Ω and biconical antenna with CST
The Electromagnetic Simulation result of model, the Electromagnetic Simulation result are transmission coefficient one, and now, the output port of the biconical antenna is straight
Connect output transmission coefficient one；
S02, using Network Analyzer as the drive signal of the hardened structure of line, is sent out by Network Analyzer call wire plate structural radiation
The actual test result that penetrates, the actual test result are transmission coefficient two, now, the top port of cable and Network Analyzer
Port one connect, the output port of the biconical antenna is connected with the port two of the Network Analyzer；
S03, comparative analysis transmission coefficient one and transmission coefficient two, such as difference less, illustrate that Electromagnetic Simulation real result is accurate
Really.
A kind of detection means of the hardened structure radiation-emitting intensity of line that the present invention is provided and determination method, be mainly
Understand the problem of the radiation-emitting intensive analysis of the hardened structure of line never under same parameter.Final investigation cable actuated port（Begin
End port）And the size of the transmission coefficient between biconical antenna output port, emulation and test are analyzed, make to measure
The test result true and accurate of the hardened structure radiation-emitting intensity of line, error are little.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the schematic diagram of biconical antenna and cable relative position in the present invention；
Fig. 4 is that biconical antenna is in S under different polarized states in the present invention21Test and simulation result figure；
Fig. 5 for the hardened structure of center line of the present invention under identical arrangement using different length cable simulation result comparison diagram；
Fig. 6 is that cable is in S under differing heights in the present invention21Test and simulation result figure.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is further described.
As shown in Fig. 1 ~ Fig. 3, a kind of detection means of the hardened structure radiation-emitting intensity of line, including being arranged at semi-anechoic chamber
Test desk 4 in 3, tiling on the test desk 4 have metallic plate 6, and 4 upper horizontal of the test desk is provided with single cable 7, institute
The port one of the top port and Network Analyzer 8 of stating cable 7 is connected, and the terminal prot of the cable 7 is by shorting stub 9 and institute
State metallic plate 6 to be connected；The cable 7 and metallic plate 6 constitute the hardened structure of line, and biconical antenna 10 receives the spoke of the hardened structure of the line
Penetrate, the output port of the biconical antenna 10 is directly exported transmission coefficient or is connected with the port two of the Network Analyzer 8.
The hardened structure of the line is grounded by some ground connection copper strips 11.
The output port of the top port of the cable 7 and the biconical antenna 10 is all by coaxial line 12 and the network
Analyzer 8 is connected.
Absorbing material 5 is provided with the wall of the semi-anechoic chamber 3.
The hardened structure of the line is the hardened structure of single line line.
The deficiency of the hardened structure radiation-emitting intensive analysis of the line that cable 7 and metallic plate 6 constituted for conventional method, this
Bright emulated using simple two-port network and test analysis.The arrangement of whole simulation model 1 and actual test module 2 according to
The requirement of MIL-STD-461F.
Simulation model 1 and actual test module 2 are may be contained within semi-anechoic chamber 3.
Actual test module 2 includes test desk 4, and tiling on the test desk 4 has metallic plate 6,4 top water of the test desk
Put down and single cable 7 is provided with, the top port of the cable 7 is connected with the port one of Network Analyzer 8, the end of the cable 7
End port is connected with the metallic plate 6 by shorting stub 9, the hardened structure spoke of the line for receiving the cable 7 and the composition of metallic plate 6
The output port of the biconical antenna 10 that penetrates is connected with the port two of the Network Analyzer 8.
Simulation model 1 includes all parts of actual test module 2, but do not need the output port of the biconical antenna 10 with
The port two of the Network Analyzer 8 connects, but the output port for replacing with the biconical antenna 10 directly exports transmission system
Number.
A kind of detection means of the hardened structure radiation-emitting intensity of line that the present invention is provided and determination method, apparatus structure
Simply, measurement result true and accurate.
Cable 7 adopts 1.3 m copper lines of length, adds 50 Ω discrete end between 7 top port of cable and metallic plate 6
Mouthful, the terminal prot of cable 7 is connected with metallic plate 6 by shorting stub 9.Additionally in the perpendicular bisector of cable 7, with cable 7
Level places biconical antenna 10 at the position of 1m and 3 Metal ground of semi-anechoic chamber, 1.2 m, for receiving the hardened structure spoke of line
The radiation-emitting intensity of beam.7 radius R of the cable is 1.32mm；The shorting stub 9 is for being vertically arranged and being highly 5cm.Adopt
The drive signal of the hardened structure of the line that constituted as cable 7 and metallic plate 6 with Agilent portable network analyzer, biconical antenna
The radiation-emitting signal that the hardened structure of line that 10 receiving cables 7 and metallic plate 6 constitute is produced.Cable 7 in above-mentioned whole device structure
Length, cable 7 can all change apart from the height of metallic plate 6.Final cable 7 of investigating drives port and biconical antenna 10
Transmission coefficient S between output port21Size.
Emulation and test comparison analysis result are as shown in Fig. 4 ~ Fig. 6.
The Network Analyzer 8 is Agilent portable network analyzer.
7 top port of the cable is connected with port one by standard sub-miniature A connector.
A kind of determination method of the hardened structure radiation-emitting intensity of line, this analysis method using Electromagnetic Simulation and actual are surveyed
The method of examination comparative analysis.Electromagnetic Simulation sets up full-wave simulation model with CST, and the foundation of model is according to MIL-STD461F's
Requirement is carried out, as shown in Fig. 1 ~ Fig. 3.For accuracy and the authenticity of verifying electromagnetic emulation, experiment test is adopted further（I.e.
Actual test）Method, part of detecting includes electromagnetic compatible dark chamber（That is semi-anechoic chamber 3）, vector network analyzer（That is network
Analyzer 8）, coaxial line 12 etc..The arrangement of same actual test in strict accordance with the requirement of MIL-STD461F, as Fig. 1 ~ Fig. 3 institute
Show.Finally Electromagnetic Simulation result and actual test result are contrasted, by the result under different conditions is analyzed, finally draw
The conclusion of the hardened structure radiation-emitting intensity of line.
Experiment is radiant body using the hardened structure of single line line, if the radius of cable 7 is R, 4 surface metal plate 6 of distance test table
Distance be H, apart from table side Edge Distance be L, biconical antenna 10 apart from cable 7 distance be D.Portable using Agilent
The drive signal of the hardened structure of line that Network Analyzer constitutes as cable 7 and metallic plate 6,7 top port of cable passes through standard SMA
Joint is connected with 8 port one of Network Analyzer, for the preferably hardened structure radiation-emitting intensity of research and analysis line, its tag wire
Cable 7 is directly connected with metallic plate 6, and now 7 terminal of cable is in short-circuit condition.8 port two of Network Analyzer be located at cable
10 output port of biconical antenna of 1 m distant place of front is connected.The intensity of final emulation and the hardened structure radiation-emitting of p-wire is led to
Source driving signal is crossed in above-mentioned two-port network to the S of reception antenna output end21To characterize.
As shown in figure 4, no matter biconical antenna 10 connects 6 radiant body of wire rewinding board in vertical polarization or horizontal polarization state
, there is obvious resonance phenomena in 115 MHz in radiation-emitting.The hardened structure of line that cable 7 and metallic plate 6 constitute is found through analysis
In radiant body, the length of cable 7 is 1.3 m, and respective frequencies f are 230 MHz, and resonant frequency is about f/2.It can be seen that the length of cable 7
Impact S21The resonant frequency of curve.
As shown in figure 5, in the hardened structure radiant body of the line that constitutes of cable 7 and metallic plate 6 cable 7 effect length resonance frequency
Rate, when the length of cable 7 risen in MIL-STD461F by 1.3 m require 2 m of maximum length when, S21Maximum corresponds to frequency
75MHz is moved to from 115 MHz, it is seen that the cable 7 under certain power signal and the resonance frequency of the hardened structure of the line of the composition of metallic plate 6
Rate has direct relation with the length of cable.
While Fig. 4 in emulation and test result show wire rope 7 apart from metallic plate 6 contour in the case of, 80MHz-
The hardened structure radiant body of line that 150MHz frequency ranges cable 7 and metallic plate 6 constitute is in reception antenna（That is biconical antenna 10）Place
In vertical direction, radiation-emitting intensity is higher than horizontal direction, it is seen that this frequency range（That is 80MHz-150MHz）Interior vertical polarization radiation is sent out
Penetrate leading role is accounted in whole system radiation-emitting.
As shown in fig. 6, emulation and test show that cable 7 increases 5cm, cable 7 and metallic plate 6 apart from the height H of metallic plate 6
Radiation-emitting intensity of the hardened structure of the line of composition at reception antenna increases 3-5dB.
When the circuit current intensity flowed in loop of the free space intermediate ring road area for S is I, frequency is the signal of F, away from
With a distance from loop for produced radiation intensity away from D it is.When cable 7 with metallic plate 6 apart from H compared with hour, the electric current on cable 7
Little with current path loop area S that the loop current on metallic plate 6 is formed so that loop current is to the contribution amount very little that radiates.
But the increase with 7 placing height H of cable, it is meant that 7 earth terminal of cable is elongated, current path loop area S become big therewith, therefore electric
Flow the contribution amount to radiating and also mutually strain big, ultimately result in the radiation-emitting of the hardened structure of line that whole cable 7 and metallic plate 6 constitute
Intensity becomes big.
The above is only the preferred embodiment of the present invention, it should be pointed out that：Ordinary skill people for the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (9)
1. the detection means of the hardened structure radiation-emitting intensity of a kind of line, it is characterised in that including being arranged at semi-anechoic chamber（3）Interior
Test desk（4）, the test desk（4）Upper tiling has metallic plate（6）, the test desk（4）Upper horizontal is provided with solid wire
Cable（7）, the cable（7）Top port and Network Analyzer（8）Port one connect, the cable（7）Terminal prot
By shorting stub（9）With the metallic plate（6）It is connected；The cable（7）And metallic plate（6）The hardened structure of composition line, biconical antenna
（10）Receive the radiation of the hardened structure of the line, the biconical antenna（10）Output port directly export transmission coefficient or with described
Network Analyzer（8）Port two connect.
2. the detection means of the hardened structure radiation-emitting intensity of a kind of line according to claim 1, it is characterised in that：The line
Hardened structure passes through some ground connection copper strips（11）Ground connection.
3. the detection means of the hardened structure radiation-emitting intensity of a kind of line according to claim 1, it is characterised in that：The line
Cable（7）Top port and the biconical antenna（10）Output port all pass through coaxial line（12）With the Network Analyzer
（8）It is connected.
4. the detection means of the hardened structure radiation-emitting intensity of a kind of line according to claim 1, it is characterised in that：Described half
Anechoic chamber,（3）Wall on be provided with absorbing material（5）.
5. the detection means of the hardened structure radiation-emitting intensity of a kind of line according to claim 1, it is characterised in that：The line
Hardened structure is the hardened structure of single line line.
6. the detection means of the hardened structure radiation-emitting intensity of a kind of line according to claim 1, it is characterised in that：The line
Cable（7）Using the copper cash of 1.3 m of length, the cable（7）Radius R is 1.32mm, the cable（7）Top port and metallic plate
（6）Between add the discrete port of 50 Ω；The shorting stub（9）For being vertically arranged and being highly 5cm；In the cable（7）Hang down
Straight bisector, with cable（7）Level is at a distance of 1m and apart from the semi-anechoic chamber（3）Place at the position of 1.2 m of Metal ground
The biconical antenna（10）.
7. the detection means of the hardened structure radiation-emitting intensity of a kind of line according to claim 1, it is characterised in that：The net
Network analyzer（8）For Agilent portable network analyzer.
8. the detection means of the hardened structure radiation-emitting intensity of a kind of line according to claim 1, it is characterised in that：The line
Cable（7）Top port is connected with port one by standard sub-miniature A connector.
9. a kind of determination method of the hardened structure radiation-emitting intensity of line according to any one of claim 1 ~ 8, which is special
Levy and be：Comprise the following steps：
S01, using the cable（7）Top port and metallic plate（6）Between add the discrete port of 50 Ω as the hardened structure of line
Drive signal port, sets up full-wave simulation model and using the discrete port of 50 Ω and biconical antenna with CST（10）Port note
The Electromagnetic Simulation result of record full-wave simulation model, the Electromagnetic Simulation result are transmission coefficient one, now, the biconical antenna
（10）Output port directly export transmission coefficient one；
S02, using Network Analyzer（8）As the drive signal of the hardened structure of line, by Network Analyzer（8）The hardened structure of call wire
The actual test result of radiation-emitting, the actual test result are transmission coefficient two, now, the cable（7）Top end
Mouth and Network Analyzer（8）Port one connect, biconical antenna（10）Output port and the Network Analyzer（8）Port
Two connections；
S03, comparative analysis transmission coefficient one and transmission coefficient two, such as difference less, illustrate that Electromagnetic Simulation real result is accurate
Really.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611049759.4A CN106483388A (en) | 2016-11-24 | 2016-11-24 | A kind of detection means of the hardened structure radiation-emitting intensity of line and determination method |
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| CN201611049759.4A CN106483388A (en) | 2016-11-24 | 2016-11-24 | A kind of detection means of the hardened structure radiation-emitting intensity of line and determination method |
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| CN201611049759.4A Pending CN106483388A (en) | 2016-11-24 | 2016-11-24 | A kind of detection means of the hardened structure radiation-emitting intensity of line and determination method |
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Cited By (2)
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| CN109633513A (en) * | 2018-12-20 | 2019-04-16 | 北京无线电计量测试研究所 | A kind of determination method and system of installation electromagnetical radiation test darkroom performance |
| CN112632823A (en) * | 2020-12-21 | 2021-04-09 | 广州广电计量检测股份有限公司 | Simulation method and device for predicting electromagnetic radiation |
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