CN102955086A - Method for testing shielding effectiveness of waveguide transfer switch - Google Patents
Method for testing shielding effectiveness of waveguide transfer switch Download PDFInfo
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- CN102955086A CN102955086A CN201210412777XA CN201210412777A CN102955086A CN 102955086 A CN102955086 A CN 102955086A CN 201210412777X A CN201210412777X A CN 201210412777XA CN 201210412777 A CN201210412777 A CN 201210412777A CN 102955086 A CN102955086 A CN 102955086A
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Abstract
The invention relates to the technical field of electronic testing and shielding effectiveness testing, and in particular relates to a method for testing the shielding effectiveness of a waveguide transfer switch. The equipment used in the method comprises a radio frequency conversion device, a transmitting antenna, a receiving instrument, a signal source, a coaxial cable and a shielding room. The method is characterized in that the radio frequency conversion device is communicated with the receiving instrument through the coaxial cable; the radio frequency conversion device and the receiving instrument are arranged inside the shielding room; the radio frequency conversion device is fixed at a testing through hole of the wall in the shielding room; the signal source is communicated with the transmitting antenna through the coaxial cable; the signal source and the transmitting antenna are arranged outside the shielding room; the transmitting antenna aligns with the testing through hole in the wall of the shielding room; the distance between the top of the transmitting antenna and the testing through hole is D; and the shielding effectiveness is tested in three steps including measuring a direct connection value, measuring a practical value and calculating the shielding effectiveness. According to the method for testing the shielding effectiveness of the waveguide transfer switch, as the testing method that a practical receiving value is subtracted from the direct connection value is adopted, the ultimate testing result is high in precision and few in error.
Description
Technical field
The present invention relates to Electronic Testing and shield effectiveness technical field of measurement and test, is a kind of waveguide switch shield effectiveness method of testing.
Background technology
In recent years, in electromagnetic compatibility and the communications field, anti-electromagnetic interference performance for product requires more and more higher, because the electromagnetic interference (EMI) emissions frequency range of each electronic product is more and more wider, the high band interfering frequency is more and more, this is so that the application of waveguide device is more and more, scope is more and more wider, this just requires radio frequency bindiny mechanism, the anti-electromagnetic interference capability of the Related products such as hyperchannel waveguide switch requires more and more stricter, and the ability that determines its anti-electromagnetic interference (EMI) in space often depends on the shield effectiveness of its equipment cavity self, because modern electronic equipment is towards diversification, miniaturization development, thereby so that some waveguide switch passages increase.General shield effectiveness method of testing can't accurately test out the shield effectiveness of hyperchannel waveguide switch at present.Therefore, verify the shield effectiveness of the radio-frequency devices such as some radio frequency connectors, waveguide or hyperchannel waveguide switch in the urgent need to a kind of waveguide switch shield effectiveness method of testing.
Summary of the invention
The purpose of this invention is to provide a kind of waveguide switch shield effectiveness method of testing, it is to be combined by emitting antenna and radio frequency conversion equipment, can be applicable to the radio-frequency devices such as radio frequency connector, waveguide or hyperchannel waveguide switch.
Technical scheme of the present invention is a kind of waveguide switch shield effectiveness method of testing, its equipment comprises radio frequency conversion equipment, emitting antenna, receiving instrument, signal source, coaxial cable and screened room, it is characterized in that: the radio frequency conversion equipment is by coaxial cable and receiving instrument conducting, they place in the screened room, and the radio frequency conversion equipment is fixed on the test via hole place of screened room body of wall; Signal source is by coaxial cable and emitting antenna conducting, and they place outside the screened room, and emitting antenna is over against the test via hole of screened room body of wall, and the emitting antenna top is D with the distance of test via hole; This waveguide switch shield effectiveness method of testing is carried out according to following step:
Described radio frequency conversion equipment is Waveguide coaxial conversion equipment, bi-directional RF connector or bidirectional metal shield electric-connector, its middle part is provided with metal flange, inwall by screw and screened room is fixed, and installs conductive gasket additional between the inwall of metal flange and screened room.
Described emitting antenna is toroidal magnetic field test antenna, dipole antenna or microwave horn antenna, and its transmission test frequency range is 9KHz to 40GHz.
Described receiving instrument is receiver or frequency spectrograph.
Described signal source is function signal generator, modulation signal generator or broadband signal source.
Described coaxial cable is the coaxial cable that can satisfy 9KHz to 40GHz test.
Described screened room is electromagnetic shielding chamber, shielded anechoic chamber or semi-anechoic chamber.
The distance D of described emitting antenna top and test via hole is less than or equal to 30 centimetres.
But characteristics of the present invention are the shield effectivenesss that go out measured device by the isolation of radio frequency conversion equipment, screened room, receiving instrument Validity Test, owing to having adopted straight-through value (value that receiving instrument receives during without measured device) to deduct the method for testing of actual reception value, so that test net result precision is high, error is little.
Description of drawings
The present invention is further illustrated below in conjunction with embodiment.
Fig. 1 is during without measured device, the device schematic diagram of waveguide switch shield effectiveness method of testing.
Fig. 2 is when measured device is arranged, the device schematic diagram of waveguide switch shield effectiveness method of testing.
Among the figure: 1, radio frequency conversion equipment; 2, emitting antenna; 3, receiving instrument; 4, signal source; 5, coaxial cable; 6, screened room; 7, measured device; D, emitting antenna top and the distance of testing via hole.
Embodiment
A kind of waveguide switch shield effectiveness method of testing, the equipment that it uses has comprised radio frequency conversion equipment 1, emitting antenna 2, receiving instrument 3, signal source 4, coaxial cable 5 and screened room 6.
As shown in Figure 1, radio frequency conversion equipment 1 is by coaxial cable 5 and receiving instrument 3 conductings, and they place in the screened room 6.Radio frequency conversion equipment 1 is arranged on the test via hole place of screened room 6 inwalls, and its middle part is provided with metal flange, fixes by the inwall of screw and screened room 6, installs conductive gasket additional between the inwall of metal flange and screened room 6.
Radio frequency conversion equipment 1 is Waveguide coaxial conversion equipment, bi-directional RF connector or bidirectional metal shield electric-connector.
Receiving instrument 3 is receiver or frequency spectrograph.
Emitting antenna 2 is toroidal magnetic field test antenna, dipole antenna or microwave horn antenna, and its transmission test frequency range is 9KHz to 40GHz.
The coaxial cable 5 that connects each several part in the device is the coaxial cables that can satisfy 9KHz to 40GHz test.
Screened room 6 is electromagnetic shielding chamber, shielded anechoic chamber or semi-anechoic chamber, its objective is to prevent that incoming signal from directly disturbing receiving instrument 3 and emitting antenna 2, and then affects the authenticity of testing and a kind of isolation environment that adopts.
When radio frequency conversion equipment 1, emitting antenna 2, receiving instrument 3, signal source 4, coaxial cable 5 and screened room 6 according to above-mentioned method after setting completed, can carry out the test of shield effectiveness.
This waveguide switch shield effectiveness method of testing is carried out according to following step:
The method of testing that value (value that receiving instrument receives during without measured device) deducts actual reception value is led directly in this employing, so that test net result precision is high, error is little.
The parts that the 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 (8)
1. waveguide switch shield effectiveness method of testing, its equipment comprises radio frequency conversion equipment (1), emitting antenna (2), receiving instrument (3), signal source (4), coaxial cable (5) and screened room (6), it is characterized in that: radio frequency conversion equipment (1) is by coaxial cable (5) and receiving instrument (3) conducting, they place in the screened room (6), and radio frequency conversion equipment (1) is fixed on the test via hole place of screened room (6) body of wall; Signal source (4) is by coaxial cable (5) and emitting antenna (2) conducting, and they place outside the screened room (6), and emitting antenna (2) is over against the test via hole of screened room (6) body of wall, and emitting antenna (2) top is D with the distance of test via hole; This waveguide switch shield effectiveness method of testing is carried out according to following step:
Step 1 is surveyed straight-through value; Signal source (4) is sent signal, and sends incident wave by emitting antenna (2), after directly receiving by radio frequency conversion equipment (1), locates to get straight-through value at receiving instrument (3);
Step 2 is surveyed actual value; Measured device (7) is arranged on the outer test via hole place of screened room (6), and measured device (7) installs shielding gasket additional with the surface of contact of screened room (6); After setting measured device (7), signal source (4) is sent signal, and sends incident wave by emitting antenna (2), after directly receiving by radio frequency conversion equipment (1), locates to obtain actual value at receiving instrument (3);
Step 3 is calculated shield effectiveness; Deduct the actual value that obtains in the step 2 with the straight-through value that obtains in the step 1, acquired results is the shield effectiveness of measured device (7).
2. a kind of waveguide switch shield effectiveness method of testing described in according to claim 1, it is characterized in that: described radio frequency conversion equipment (1) is Waveguide coaxial conversion equipment, bi-directional RF connector or bidirectional metal shield electric-connector, its middle part is provided with metal flange, inwall by screw and screened room (6) is fixed, and installs conductive gasket additional between the inwall of metal flange and screened room (6).
3. a kind of waveguide switch shield effectiveness method of testing described in according to claim 1, it is characterized in that: described emitting antenna (2) is toroidal magnetic field test antenna, dipole antenna or microwave horn antenna, and its transmission test frequency range is 9KHz to 40GHz.
4. a kind of waveguide switch shield effectiveness method of testing described in according to claim 1, it is characterized in that: described receiving instrument (3) is receiver or frequency spectrograph.
5. a kind of waveguide switch shield effectiveness method of testing described in according to claim 1, it is characterized in that: described signal source (4) is function signal generator, modulation signal generator or broadband signal source.
6. a kind of waveguide switch shield effectiveness method of testing described in according to claim 1, it is characterized in that: described coaxial cable (5) is the coaxial cable that can satisfy 9KHz to 40GHz test.
7. a kind of waveguide switch shield effectiveness method of testing described in according to claim 1, it is characterized in that: described screened room (6) is electromagnetic shielding chamber, shielded anechoic chamber or semi-anechoic chamber.
8. a kind of waveguide switch shield effectiveness method of testing described in according to claim 1 is characterized in that: the distance D of described emitting antenna (2) top and test via hole is less than or equal to 30 centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210412777XA CN102955086A (en) | 2012-10-25 | 2012-10-25 | Method for testing shielding effectiveness of waveguide transfer switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210412777XA CN102955086A (en) | 2012-10-25 | 2012-10-25 | Method for testing shielding effectiveness of waveguide transfer switch |
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| CN102955086A true CN102955086A (en) | 2013-03-06 |
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| CN201210412777XA Pending CN102955086A (en) | 2012-10-25 | 2012-10-25 | Method for testing shielding effectiveness of waveguide transfer switch |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760445A (en) * | 2014-01-24 | 2014-04-30 | 中国人民解放军军械工程学院 | Method for testing shielding effectiveness of irregular structure cavity based on reverberation room |
| CN105096583A (en) * | 2015-03-20 | 2015-11-25 | 蒋海兵 | Shielding structure for remote controller test and remote controller test equipment |
| CN107843793A (en) * | 2017-11-24 | 2018-03-27 | 广州力赛计量检测有限公司 | A kind of testing jig, shield effectiveness test system and its method of testing |
| 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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| USH321H (en) * | 1984-03-08 | 1987-08-04 | The United States Of America As Represented By The Secretary Of The Air Force | Machined two-piece microwave waveguide |
| US6255830B1 (en) * | 1998-05-04 | 2001-07-03 | Nortel Networks Limited | Method of testing shielding effectiveness and electromagnetic field generator for use in testing shielding effectiveness |
| CN2837946Y (en) * | 2005-11-11 | 2006-11-15 | 埃泰克汽车电子(芜湖)有限公司 | RF tester |
| CN101662078A (en) * | 2009-07-30 | 2010-03-03 | 北京大泽科技有限公司 | Small shielding body electromagnetic shielding performance testing device, system and method therefor |
| CN102735972A (en) * | 2012-06-20 | 2012-10-17 | 西安空间无线电技术研究所 | Method for detecting electromagnetism leakage degree of passive product |
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2012
- 2012-10-25 CN CN201210412777XA patent/CN102955086A/en active Pending
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| USH321H (en) * | 1984-03-08 | 1987-08-04 | The United States Of America As Represented By The Secretary Of The Air Force | Machined two-piece microwave waveguide |
| US6255830B1 (en) * | 1998-05-04 | 2001-07-03 | Nortel Networks Limited | Method of testing shielding effectiveness and electromagnetic field generator for use in testing shielding effectiveness |
| CN2837946Y (en) * | 2005-11-11 | 2006-11-15 | 埃泰克汽车电子(芜湖)有限公司 | RF tester |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760445A (en) * | 2014-01-24 | 2014-04-30 | 中国人民解放军军械工程学院 | Method for testing shielding effectiveness of irregular structure cavity based on reverberation room |
| CN103760445B (en) * | 2014-01-24 | 2016-03-16 | 中国人民解放军军械工程学院 | A kind of irregular structure cavity shield effectiveness method of testing based on reverberation chamber |
| CN105096583A (en) * | 2015-03-20 | 2015-11-25 | 蒋海兵 | Shielding structure for remote controller test and remote controller test equipment |
| CN107843793A (en) * | 2017-11-24 | 2018-03-27 | 广州力赛计量检测有限公司 | A kind of testing jig, shield effectiveness test system and its method of testing |
| 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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Application publication date: 20130306 |