CN102955073A - Method for testing insertion loss of filtering and shielding integrated component - Google Patents
Method for testing insertion loss of filtering and shielding integrated component Download PDFInfo
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- CN102955073A CN102955073A CN2012104126283A CN201210412628A CN102955073A CN 102955073 A CN102955073 A CN 102955073A CN 2012104126283 A CN2012104126283 A CN 2012104126283A CN 201210412628 A CN201210412628 A CN 201210412628A CN 102955073 A CN102955073 A CN 102955073A
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- filtering
- integral component
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- insertion loss
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Abstract
The invention relates to the technical field of electronic testing and insertion loss testing, and discloses a method for testing the insertion loss of a filtering and shielding integrated component. According to the method for testing the insertion loss of the filtering and shielding integrated component, equipment adopted at least comprises a special adapter plate, a testing clamp, a signal source, a spectrometer, a coaxial cable and a shielding chamber, wherein the special adapter plate is fixedly connected with a mask of the shielding chamber in a lap joint manner, and a metal mesh liner is additionally arranged at the lap joint part; the signal source is arranged outside the shielding chamber; the spectrometer is arranged inside the shielding chamber; the coaxial cable is used for communicating the signal source with the spectrometer; the coaxial cable penetrates through the special adapter plate and the mask; and the shielding chamber is separately connected with the ground. The method comprises three steps of measuring a direct value, measuring a filtered receiving value of each frequency point and calculating the insertion loss. According to the method, the filtered receiving value of each frequency point is subtracted from the direct value, so that the insertion loss of the filtering and shielding integrated component is obtained with high precision and good university.
Description
Technical field
The present invention relates to Electronic Testing and Analysis of Test Technology for Insertion Loss field, is the insertion loss method of testing of filtering shielding integral component.
Background technology
In recent years, in the electromagnetic compatibility field, anti-electromagnetic interference performance for product requires day by day to increase, this is so that the electromagnetic interference (EMI) inhibition Capability Requirement of product is also more strict, and determine that its anti-electromagnetic interference capability often depends on the filter capacity of the outer line cable of equipment and to the shield effectiveness of cavity, so the filtering shielding integral component that shielding and filtering are melted as the whole body has shown very excellent performance characteristics, and very widely market outlook are arranged.But how to verify the insertion loss of a filtering shielding integral component, also do not have the complete test of a cover, therefore verify the insertion loss of filtering shielding integral component in the urgent need to a kind of insertion loss method of testing of filtering shielding integral component.
Summary of the invention
The insertion loss method of testing that the purpose of this invention is to provide a kind of filtering shielding integral component is applicable to any filtering shielding integral component that is installed on panel, interface, the isolated chambers end face.
Technical scheme of the present invention is the insertion loss method of testing of filtering shielding integral component, its equipment comprises special-purpose card extender, test clip, signal source, frequency spectrograph, coaxial cable and screened room at least, the illiteracy plate overlap joint of special-purpose card extender and screened room is fixing, and installs wire mesh pad additional in lap-joint; Signal source is arranged on outside the screened room, and frequency spectrograph is arranged in the screened room, and coaxial cable is with signal source and frequency spectrograph conducting, and coaxial cable passes special-purpose card extender and covers plate; Screened room connects separately the earth; The insertion loss method of testing of this filtering shielding integral component is carried out according to following step:
Step 1 is surveyed straight-through value; Signal source transmits, and signal directly leads directly to test by the adaptor connector on the screened room wall by the coaxial cable transmission, and namely in the situation without filtering between signal source and the frequency spectrograph, the value that frequency spectrograph records is straight-through value;
Step 2 is surveyed reception value after the filtering of each frequency; Filtering is shielded integral component be fixedly mounted on the special-purpose card extender, conductive gasket is selected whether to install additional according to actual conditions by lap-joint, coaxial cable and the conducting of filtering shielding integral component; The heart yearn folder of test clip is arranged in the screened room, and clamps the loop lead-in wire of coaxial cable, and the folder of drawing of test clip is arranged on outside the screened room, and clamps the PE ground end of filtering shielding integral component; Test after setting, signal source transmits, and the signal transmission reaches frequency spectrograph after shielding integral component through filtering, and frequency spectrograph is measured the reception value behind each frequency process filtering shielding integral component;
Described special-purpose card extender is the card extender according to the illiteracy plate of screened room and the making of filtering shielding integral component.
Described test clip comprises the heart yearn folder and draws folder that it is take the N-type radio frequency connector as pedestal, behind center pit and crust extension line, at the other end weld metal clipping one-tenth of lead-in wire.
Described signal source is function signal generator, modulation signal generator or broadband signal source.
Described frequency spectrograph is the standard device that satisfies 9KHZ to 40GHZ test frequency range.
Described coaxial cable is the coaxial cable that satisfies 9KHZ to 40GHZ test frequency range.
Described screened room is electrical measurement screened room, shielded anechoic chamber or semi-anechoic chamber.
Characteristics of the present invention are by using straight-through value to deduct reception value after the filtering of each frequency, draw the insertion loss of filtering shielding integral component, and the method precision height, versatility are good.
Description of drawings
The present invention is further illustrated below in conjunction with embodiment.
Fig. 1 is when shielding integral component without filtering, the structural representation of the insertion loss method of testing of filtering shielding integral component.
Fig. 2 is when filtering shielding integral component is arranged, the structural representation of the insertion loss method of testing of filtering shielding integral component.
Fig. 3 is the test clip structural representation.
Among the figure: 1, special-purpose card extender; 2, test clip; 3, signal source; 4, frequency spectrograph; 5, coaxial cable; 6, screened room; 7, filtering shielding integral component; 8, cover plate.
Embodiment
Embodiment 1
The insertion loss method of testing of filtering shielding integral component, its equipment comprises special-purpose card extender 1, test clip 2, signal source 3, frequency spectrograph 4, coaxial cable 5 and screened room 6 at least, special-purpose card extender 1 is fixing with illiteracy plate 8 overlap joints of screened room 6, and installs wire mesh pad additional in lap-joint; Signal source 3 is arranged on outside the screened room 6, and frequency spectrograph 4 is arranged in the screened room 6, and coaxial cable 5 is with signal source 3 and frequency spectrograph 4 conductings, and coaxial cable 5 passes special-purpose card extender 1 and covers plate 8; Screened room 6 connects separately the earth.
Embodiment 2
The insertion loss method of testing of filtering shielding integral component, its equipment comprises special-purpose card extender 1, test clip 2, signal source 3, frequency spectrograph 4, coaxial cable 5 and screened room 6 at least.
As shown in Figure 1, screened room 6 is electrical measurement screened room, shielded anechoic chamber or semi-anechoic chamber, and screened room 6 connects separately the earth.The setting of screened room 6 is for complete Isolation input, output signal, makes the test result that obtains true.
Special-purpose card extender 1 is that special-purpose card extender 1 is fixing with illiteracy plate 8 overlap joints of screened room 6 according to the illiteracy plate 8 of screened room 6 and the card extender of filtering shielding integral component 7 making, and installs wire mesh pad additional in lap-joint.Effectively filtering is shielded integral component and screened room (6) by this connected mode and form a whole, finish the insertion loss test.
Frequency spectrograph 4 is the standard devices that satisfy 9KHZ to 40GHZ test frequency range, is arranged in the screened room 6.
After setting above each parts, carry out the test of insertion loss, the insertion loss method of testing of this filtering shielding integral component is carried out according to following step:
Step 1 is surveyed straight-through value; Signal source 3 transmits, and signal is transmitted by coaxial cable 5, directly leads directly to test by the adaptor connector on screened room 6 walls, and namely in the situation without filtering between signal source 3 and the frequency spectrograph 4, the value that frequency spectrograph 4 records is straight-through value.
Step 2 as shown in Figure 2, is surveyed reception value after the filtering of each frequency; Filtering is shielded integral component 7 be fixedly mounted on the special-purpose card extender 1, conductive gasket is selected whether to install additional according to actual conditions by lap-joint, coaxial cable 5 and 7 conductings of filtering shielding integral component; The heart yearn folder of test clip 2 is arranged in the screened room 6, and clamps the loop lead-in wire of coaxial cable 5, and the folder of drawing of test clip 2 is arranged on outside the screened room 6, and clamps the PE ground end of filtering shielding integral component 7; Test after setting, signal source 3 transmits, and the signal transmission reaches frequency spectrograph 4 after shielding integral component 7 through filtering, and frequency spectrograph 4 is measured the reception value behind each frequency process filtering shielding integral component 7.
As shown in Figure 3, test clip 2 comprises the heart yearn folder and draws folder that it is take the N-type radio frequency connector as pedestal, behind center pit and crust extension line, at the other end weld metal clipping one-tenth of lead-in wire.
The insertion loss method of testing of this filtering shielding integral component draws the insertion loss of filtering shielding integral component 7 by using straight-through value to deduct reception value after the filtering of each frequency, and the method precision height, versatility are good.
The parts that present embodiment is not described in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not one by one narration.
Claims (7)
1. filtering shields the insertion loss method of testing of integral component, its equipment comprises special-purpose card extender (1), test clip (2), signal source (3), frequency spectrograph (4), coaxial cable (5) and screened room (6) at least, special-purpose card extender (1) is fixing with illiteracy plate (8) overlap joint of screened room (6), and installs wire mesh pad additional in lap-joint; Signal source (3) is arranged on outside the screened room (6), and frequency spectrograph (4) is arranged in the screened room (6), and coaxial cable (5) is with signal source (3) and frequency spectrograph (4) conducting, and coaxial cable (5) passes special-purpose card extender (1) and covers plate (8); Screened room (6) connects separately the earth; The insertion loss method of testing of this filtering shielding integral component is carried out according to following step:
Step 1 is surveyed straight-through value; Signal source (3) transmits, signal is transmitted by coaxial cable (5), directly lead directly to test by the adaptor connector on screened room (6) wall, namely in the situation without filtering between signal source (3) and the frequency spectrograph (4), the value that frequency spectrograph (4) records is straight-through value;
Step 2 is surveyed reception value after the filtering of each frequency; Filtering is shielded integral component (7) be fixedly mounted on the special-purpose card extender (1), conductive gasket is selected whether to install additional according to actual conditions by lap-joint, coaxial cable (5) and the conducting of filtering shielding integral component (7); The heart yearn folder of test clip (2) is arranged in the screened room (6), and clamps the loop lead-in wire of coaxial cable (5), and the folder of drawing of test clip (2) is arranged on outside the screened room (6), and clamps the PE ground end of filtering shielding integral component (7); Test after setting, signal source (3) transmits, and the signal transmission reaches frequency spectrograph (4) after shielding integral component (7) through filtering, and frequency spectrograph (4) is measured the reception value behind each frequency process filtering shielding integral component (7);
Step 3 is calculated insertion loss; The straight-through value that obtains with step 1 deducts reception value after the filtering that step 2 obtains each frequency, draws the insertion loss of filtering shielding integral component (7).
2. the insertion loss method of testing of the shielding of the filtering described in according to claim 1 integral component is characterized in that: described special-purpose card extender (1) is the card extender of making according to the illiteracy plate (8) of screened room (6) and filtering shielding integral component (7).
3. the insertion loss method of testing of the shielding of the filtering described in according to claim 1 integral component, it is characterized in that: described test clip (2) comprises the heart yearn folder and draws folder, it is as pedestal take the N-type radio frequency connector, behind center pit and crust extension line, at the other end weld metal clipping one-tenth of lead-in wire.
4. the insertion loss method of testing of the shielding of the filtering described in according to claim 1 integral component, it is characterized in that: described signal source (3) is function signal generator, modulation signal generator or broadband signal source.
5. the insertion loss method of testing of the shielding of the filtering described in according to claim 1 integral component, it is characterized in that: described frequency spectrograph (4) is the standard device that satisfies 9KHZ to 40GHZ test frequency range.
6. the insertion loss method of testing of the shielding of the filtering described in according to claim 1 integral component, it is characterized in that: described coaxial cable (5) is the coaxial cable that satisfies 9KHZ to 40GHZ test frequency range.
7. the insertion loss method of testing of the shielding of the filtering described in according to claim 1 integral component, it is characterized in that: described screened room (6) is electrical measurement screened room, shielded anechoic chamber or semi-anechoic chamber.
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| CN201210412628.3A CN102955073B (en) | 2012-10-25 | 2012-10-25 | The insertion loss test method of filtering shielding integral component |
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| CN201210412628.3A CN102955073B (en) | 2012-10-25 | 2012-10-25 | The insertion loss test method of filtering shielding integral component |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105510722A (en) * | 2015-12-09 | 2016-04-20 | 上海精密计量测试研究所 | Flat absorbing material insertion loss measurement apparatus and measurement method |
| CN110531167A (en) * | 2019-09-16 | 2019-12-03 | 西安兆格电子信息技术有限公司 | A kind of cable pathways Insertion Loss measuring device and measurement method |
| CN110596501A (en) * | 2019-10-17 | 2019-12-20 | 中国人民解放军军事科学院国防工程研究院 | Performance test system of power filter under simulated actual working state |
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| CN201616496U (en) * | 2009-11-09 | 2010-10-27 | 东莞市苏普尔电子科技有限公司 | Novel radio frequency device of passive filter series |
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Cited By (3)
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| CN105510722A (en) * | 2015-12-09 | 2016-04-20 | 上海精密计量测试研究所 | Flat absorbing material insertion loss measurement apparatus and measurement method |
| CN110531167A (en) * | 2019-09-16 | 2019-12-03 | 西安兆格电子信息技术有限公司 | A kind of cable pathways Insertion Loss measuring device and measurement method |
| CN110596501A (en) * | 2019-10-17 | 2019-12-20 | 中国人民解放军军事科学院国防工程研究院 | Performance test system of power filter under simulated actual working state |
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| CN102955073B (en) | 2018-08-17 |
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Denomination of invention: Insertion loss test method of filter shield integrated module Effective date of registration: 20210508 Granted publication date: 20180817 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: Xi'an Kairong Electronic Technologies Co.,Ltd. Registration number: Y2021990000400 |