CN208013318U - A kind of high-frequency parameter test adapter of multiple power source filter - Google Patents
A kind of high-frequency parameter test adapter of multiple power source filter Download PDFInfo
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- CN208013318U CN208013318U CN201820046125.1U CN201820046125U CN208013318U CN 208013318 U CN208013318 U CN 208013318U CN 201820046125 U CN201820046125 U CN 201820046125U CN 208013318 U CN208013318 U CN 208013318U
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Abstract
The utility model discloses a kind of high-frequency parameter test adapters of multiple power source filter, including：Test fixture shielding box and external port, main test cavity is equipped in the test fixture shielding box, input/output chamber partition board is equipped in the main test chamber body, wherein the inner surface in the main test cavity is additionally provided with test circuit plate, the centre position of the test circuit plate is equipped with device detection pedestal；The input/output chamber partition board is separately positioned on the centre position of the both sides of the test circuit plate, it is opposite with the device detection pedestal, the external port is separately positioned on the centre position of the other both sides of the test circuit plate, is electrically connected with the input/output terminal of the test circuit plate.The utility model proposes a kind of multiple power source filter high-frequency parameter test adapter, can realize the accurate test to power-supply filter common mode/differential mode insertion loss.
Description
Technical field
The utility model is related to reliability screenings and testing field, particularly relate to a kind of high frequency ginseng of multiple power source filter
Number test adapter.
Background technology
In recent years, with the continuous development of electronic equipment, electromagnetic interference has become a kind of serious public hazards, it not only can shadow
Ring equipment normal operation, some even entail dangers to people safety.In order to inhibit electromagnetic interference, power-supply filter meet the tendency of and
It is raw, become the most powerful measure for inhibiting electromagnetic interference.Power-supply filter is low-pass filter, it is one kind by inductance, capacitance
The low-pass filter of composition allows the signal of direct current or 50Hz to pass through, to the higher other signals of frequency and interference signal have compared with
Big attenuation.Interference signal has two kinds of differential mode and common mode, and power-supply filter can play well both interference
Attenuation.The key technical indexes for weighing power-supply filter performance is its high-frequency parameter, i.e. insertion loss, is divided into and is inserted for common mode
Enter loss and Differential Mode insertion loss, particularly important is become to the accurate test of power-supply filter insertion loss.
And the connector lug of power-supply filter is often unshielded and exposed, current each manufacturer and mechanism for testing now
Often device and test equipment are placed in same electromagnetic environment and tested, device is unable to good earth, letter in test process
Number crosstalk is serious, this two large problems seriously restricts the accuracy of power-supply filter insertion loss test.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of tests of the high-frequency parameter of multiple power source filter to be adapted to
Device can realize the accurate test to power-supply filter common mode/differential mode insertion loss.
Based on a kind of above-mentioned purpose high-frequency parameter test adapter of multiple power source filter provided by the utility model, packet
It includes：Test fixture shielding box and external port, are equipped with main test cavity in the test fixture shielding box, in the main test chamber body
Equipped with input/output chamber partition board, wherein the inner surface in the main test cavity is additionally provided with test circuit plate, the test circuit
The centre position of plate is equipped with device detection pedestal；
The input/output chamber partition board is separately positioned on the centre position of the both sides of the test circuit plate, with the device
Part testing base is opposite, and the external port is separately positioned on the centre position of the other both sides of the test circuit plate, and described
The input/output terminal of test circuit plate is electrically connected.
Optionally, the test fixture shielding box includes long slab, the input/output chamber partition board and the test fixture screen
The long slab for covering box is contour.
Optionally, further include difference channel module in the main test chamber body, the difference channel module and the test
Circuit board connects.
Optionally, the material of the main test cavity is brass, and the inner surface of the main test cavity has Gold plated Layer.
Optionally, the external port is connect with SMA (wireless interface) adapter.
Optionally, the test fixture shielding box further includes openable and closable head cover.
Optionally, the inner surface of the head cover has Gold plated Layer.
From the above it can be seen that a kind of high-frequency parameter test of multiple power source filter provided by the utility model is suitable
Orchestration is equipped with input/output chamber partition board by being equipped in test fixture shielding box and main test chamber body, effectively reduces extraneous letter
Number and influence of the input/output signal crosstalk to test result, avoid the generation electromagnetic coupling at input/output signal end from influencing to survey
Test result.Test adapter provided by the utility model is equipped with external port, and external port is connect with SMA adapters, realizes signal
From microstrip line to coaxial transmission, can it directly be attached test with the test equipment of coaxial port, overcome in test process
Device is unable to the problem of good earth, realizes the accurate test to power-supply filter common mode/differential mode insertion loss.
A kind of application of the high-frequency parameter test adapter of multiple power source filter provided by the utility model, which can be improved, to be criticized
The testing efficiency and measuring accuracy of device in production process are measured, it is simple in structure.
Description of the drawings
Fig. 1 is power-supply filter Common Mode insertion loss test circuit principle schematic in the prior art；
Fig. 2 is power-supply filter Differential Mode insertion loss test circuit principle schematic in the prior art；
Fig. 3 is the embodiment signal of the high-frequency parameter test adapter of multiple power source filter provided by the utility model
Figure；
Fig. 4 is the power supply of the embodiment of the high-frequency parameter test adapter of multiple power source filter provided by the utility model
Filter Common Mode insertion loss test adapter schematic diagram；
Fig. 5 is the power supply of the embodiment of the high-frequency parameter test adapter of multiple power source filter provided by the utility model
Filter Differential Mode insertion loss test adapter schematic diagram.
Specific implementation mode
To make the purpose of this utility model, technical solution and advantage be more clearly understood, below in conjunction with specific embodiment, and
With reference to attached drawing, the utility model is further described.
Based on above-mentioned purpose, the embodiments of the present invention propose a kind of high-frequency parameter test of multiple power source filter
Adapter can realize the accurate test to power-supply filter common mode/differential mode insertion loss.
Power-supply filter is the low-pass filter with non-standard interface, and conventional test equipment is standard coaxial interface,
Directly the insertion loss of power-supply filter can not be tested.The insertion loss of power-supply filter be divided into Common Mode insertion loss and
Differential Mode insertion loss, as shown in Figure 1, for power-supply filter Common Mode insertion loss test circuit principle schematic in the prior art,
Common Mode insertion loss test is that the input of device left end two-way is measured the value of the right both ends output signal, calculated with signal all the way
Analysis obtains the value of Common Mode insertion loss.
As shown in Fig. 2, for power-supply filter Differential Mode insertion loss test circuit principle schematic in the prior art, differential mode is inserted
It is that signal all the way is resolved into two paths of signals by difference channel to supply the left input terminal of power-supply filter to enter loss test, is measured right
The value of side both ends output signal calculates analysis and obtains the value for inserting mould insertion loss.
As shown in figure 3, the implementation of the high-frequency parameter test adapter for multiple power source filter provided by the utility model
It illustrates and is intended to；Based on above-mentioned purpose, the utility model proposes a kind of high-frequency parameter test adapter of multiple power source filter,
Including test fixture shielding box and external port 2, main test cavity, the main test cavity are equipped in the test fixture shielding box
It is interior to be equipped with input/output chamber partition board 5, wherein the inner surface in the main test cavity is additionally provided with test circuit plate 4, the test
The centre position of circuit board 4 is equipped with device detection pedestal 1；
The input/output chamber partition board 5 is separately positioned on the centre position of the both sides of the test circuit plate 4, and described
Device detection pedestal 1 is opposite, and the external port 2 is separately positioned on the centre position of the other both sides of the test circuit plate 4, with
The input/output terminal of the test circuit plate 4 is electrically connected.
The test fixture shielding box includes long slab 6, the input/output chamber partition board 5 and the test fixture shielding box
Long slab 6 it is contour.
As shown in figure 3, the external port 2 is separately positioned on the both sides of the outside of the test fixture shielding box.
As shown in figure 4, the implementation of the high-frequency parameter test adapter for multiple power source filter provided by the utility model
The power-supply filter Common Mode insertion loss test adapter schematic diagram of example；Common Mode insertion loss test adapter includes test fixture
Shielding box and external port 2 are equipped with main test cavity in the test fixture shielding box, be equipped in the main test chamber body input/
Output cavity partition board 5, wherein the inner surface in the main test cavity is additionally provided with test circuit plate 4, in the test circuit plate
Meta position has installed device detection pedestal 1, and the input/output chamber partition board 5 is separately positioned on the both sides of the test circuit plate 4
Centre position, opposite with the device detection pedestal 1, the external port 2 is arranged in the other both sides of the test circuit plate 4
Centre position is electrically connected with the input/output terminal of the test circuit plate 4.
As shown in figure 5, the implementation of the high-frequency parameter test adapter for multiple power source filter provided by the utility model
The power-supply filter Differential Mode insertion loss test adapter schematic diagram of example；Further include difference channel module in the main test chamber body
6, the difference channel module 6 is connect with the test circuit plate 4, and difference channel module 6 is welded on the test circuit plate 4
For will signal differential be all the way two paths of signals.
The material of the main test cavity is brass, and the inner surface of the main test cavity has Gold plated Layer, for testing
The isolation of device input/output signal, avoids signal cross-talk in journey.
The external port 2 is connect with SMA (wireless interface) adapter, by SMA adapters realize signal from microstrip line to
Coaxial transmission directly can be attached test with the test equipment of coaxial port.
The test fixture shielding box further includes openable and closable head cover 3.The inner surface of the head cover 3 has Gold plated Layer.
Test adapter provided by the utility model is equipped with dedicated test shielding box, primarily serves following two aspects
Effect：First, shielding external electromagnetic signal, utmostly reduces interference of the external electromagnetic signal to test result；Second is that shielding is defeated
Enter/the crosstalk of output end electromagnetic signal, the generation electromagnetic coupling at input/output signal end is avoided to influence test result.
A kind of application method of the high-frequency parameter test adapter of multiple power source filter provided by the utility model：Right
When the test of power-supply filter Common Mode insertion loss and Differential Mode insertion loss, the hardware device mainly used be Network Analyzer and
The test cable to match.When test, the system that Network Analyzer is formed with test cable is calibrated first, is mainly relatively removed
The test error that test equipment and test cable itself introduce；Secondly, the Common Mode insertion loss of power-supply filter and differential mode are inserted
The test adapter for entering loss is respectively connected to the test system of Network Analyzer and test cable composition, mask placement device testing base
Corresponding position, cover tightly the head cover of test fixture shielding box, operation Network Analyzer is realized to be inserted into power-supply filter common mode and be damaged
The test of consumption and Differential Mode insertion loss.
From above-described embodiment as can be seen that a kind of high frequency ginseng for multiple power source filter that the utility model embodiment provides
Number test adapter is equipped with input/output chamber partition board by being equipped in test fixture shielding box and main test chamber body, effectively subtracts
The influence of small outer signals and input/output signal crosstalk to test result avoids the generation electromagnetism coupling at input/output signal end
Group photo rings test result.Test adapter provided by the utility model is equipped with external port, and external port is connect with SMA adapters, real
Signal is showed from microstrip line to coaxial transmission, directly can be attached test with the test equipment of coaxial port, overcome survey
Device is unable to the problem of good earth during examination, realizes the accurate test to power-supply filter common mode/differential mode insertion loss.
A kind of application of the high-frequency parameter test adapter of multiple power source filter provided by the utility model, which can be improved, to be criticized
The testing efficiency and measuring accuracy of device in production process are measured, it is simple in structure.
Those of ordinary skills in the art should understand that：The discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under the thinking of the utility model, the above reality
Applying can also be combined between the technical characteristic in example or different embodiment, and there are the utility model as described above
Many other variations of different aspect, for simplicity, they are not provided in details.Therefore, all spirit in the utility model
Within principle, any omission, modification, equivalent replacement, improvement for being made etc. should be included in the scope of protection of the utility model
Within.
Claims (7)
1. a kind of high-frequency parameter test adapter of multiple power source filter, which is characterized in that including：Test fixture shielding box and
External port is equipped with main test cavity in the test fixture shielding box, be equipped in the main test chamber body input/output chamber every
Plate, wherein the inner surface in the main test cavity is additionally provided with test circuit plate, the centre position of the test circuit plate is equipped with
Device detection pedestal；
The input/output chamber partition board is separately positioned on the centre position of the both sides of the test circuit plate, is surveyed with the device
Examination pedestal is opposite, and the external port is separately positioned on the centre position of the other both sides of the test circuit plate, with the test
The input/output terminal of circuit board is electrically connected.
2. a kind of high-frequency parameter test adapter of multiple power source filter according to claim 1, which is characterized in that institute
It includes long slab to state test fixture shielding box, and the long slab of the input/output chamber partition board and the test fixture shielding box is contour.
3. a kind of high-frequency parameter test adapter of multiple power source filter according to claim 1, which is characterized in that institute
It further includes difference channel module to state in main test chamber body, and the difference channel module is connect with the test circuit plate.
4. a kind of high-frequency parameter test adapter of multiple power source filter according to claim 1, which is characterized in that institute
The material for stating main test cavity is brass, and the inner surface of the main test cavity has Gold plated Layer.
5. a kind of high-frequency parameter test adapter of multiple power source filter according to claim 1, which is characterized in that institute
External port is stated to connect with SMA wireless interface adapters.
6. a kind of high-frequency parameter test adapter of multiple power source filter according to claim 1, which is characterized in that institute
It further includes openable and closable head cover to state test fixture shielding box.
7. a kind of high-frequency parameter test adapter of multiple power source filter according to claim 6, which is characterized in that institute
The inner surface for stating head cover has Gold plated Layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820046125.1U CN208013318U (en) | 2018-01-11 | 2018-01-11 | A kind of high-frequency parameter test adapter of multiple power source filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820046125.1U CN208013318U (en) | 2018-01-11 | 2018-01-11 | A kind of high-frequency parameter test adapter of multiple power source filter |
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| CN208013318U true CN208013318U (en) | 2018-10-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113514702A (en) * | 2021-03-24 | 2021-10-19 | 上海克开电器有限公司 | Test box for insertion loss test |
-
2018
- 2018-01-11 CN CN201820046125.1U patent/CN208013318U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113514702A (en) * | 2021-03-24 | 2021-10-19 | 上海克开电器有限公司 | Test box for insertion loss test |
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