CN102955085A - Radio frequency leakage test method - Google Patents
Radio frequency leakage test method Download PDFInfo
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- CN102955085A CN102955085A CN2012104126264A CN201210412626A CN102955085A CN 102955085 A CN102955085 A CN 102955085A CN 2012104126264 A CN2012104126264 A CN 2012104126264A CN 201210412626 A CN201210412626 A CN 201210412626A CN 102955085 A CN102955085 A CN 102955085A
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Abstract
The invention relates to the technical field of an electronic test and a radio frequency leakage test, and provides a radio frequency leakage test method. Equipment comprises a radio frequency conversion device, a receiving antenna, a receiver, a signal source, a coaxial cable and a shielding room. The radio frequency conversion device is conducted with the signal source through the coaxial cable; the radio frequency conversion device and the coaxial cable are arranged outside the shielding room; the radio frequency conversion device is fixedly arranged on a test through hole of a wall body of the shielding room through a flange; the receiving antenna is conducted with the receiver through the coaxial cable, and the receiving antenna and the receiver are arranged in the shielding room; the receiving antenna is aligned to the test through hole of the wall body of the shielding room and the distance between the top end of the receiving antenna and the test through hole is D; and a radio frequency leakage test is carried out by three steps of measuring a direct through value, measuring an actual value and calculating a radio frequency leakage amount. The radio frequency leakage test method adopts a testing method of subtracting an actual receiving value by the direct through value so that the final test result has high precision and small errors.
Description
Technical field
The present invention relates to Electronic Testing and radio-frequency leakage and measure the examination technical field, is a kind of radio-frequency leakage 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 anti-electromagnetic interference capability of the Related products such as some radio frequency bindiny mechanisms requires more and more stricter, and the ability that determines its anti-electromagnetic interference (EMI) in space often depends on the external leakage rate of its equipment cavity self, because modern electronic equipment develops towards miniaturization, thereby so that some radio frequency connectors, the radio-frequency devices such as waveguide or waveguide switch can't accurately test out the radio-frequency leakage amount of himself.Therefore, verify the radio-frequency leakage amount of the radio-frequency devices such as some radio frequency connectors, waveguide or waveguide switch in the urgent need to a kind of radio-frequency leakage method of testing.
Summary of the invention
The purpose of this invention is to provide a kind of radio-frequency leakage method of testing, by using the combination of receiving antenna and radio frequency conversion equipment, be applicable to the radio-frequency leakage test of the radio-frequency devices such as radio frequency connector, waveguide or waveguide switch.
Technical scheme of the present invention is a kind of radio-frequency leakage method of testing, its equipment comprises radio frequency conversion equipment, receiving 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 signal source conducting, they are arranged on outside the screened room, and the radio frequency conversion equipment is fixed on the test via hole place of screened room body of wall by flange; Receiving antenna is by coaxial cable and receiving instrument conducting, and they are arranged in the screened room, and receiving antenna is over against the test via hole of screened room body of wall, and the distance between receiving antenna top and test via hole is D; This radio-frequency leakage 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, exterior wall by screw and screened room is fixed, and installs conductive gasket additional between the exterior wall of metal flange and screened room.
Described receiving antenna is toroidal magnetic field test antenna, dipole antenna or microwave horn antenna, and it receives the 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.
Distance D between described receiving antenna top and test via hole is less than or equal to 30 centimetres.
But characteristics of the present invention are the radio-frequency leakage amounts 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 structural representation of radio-frequency leakage test.
Fig. 2 is when measured device is arranged, the structural representation of radio-frequency leakage test.
Among the figure: 1, radio frequency conversion equipment; 2, receiving antenna; 3, receiving instrument; 4, signal source; 5, coaxial cable; 6, screened room; 7, measured device; D, receiving antenna top and the distance of testing via hole.
Embodiment
A kind of radio-frequency leakage method of testing, the equipment that it uses comprises radio frequency conversion equipment 1, receiving 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 signal source 4 conductings, and they are arranged on outside the screened room 6.Radio frequency conversion equipment 1 is by being fixed on the test via hole place of screened room 6 bodies of wall, and its middle part is provided with metal flange, fixes by the exterior wall of screw and screened room 6, installs conductive gasket additional between the exterior wall 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 antenna 2 is by coaxial cable 5 and receiving instrument 3 conductings, and they are arranged in the screened room 6.Receiving antenna 2 is over against the test via hole of screened room 6 bodies of wall, and the distance between receiving antenna 2 tops and test via hole is D, and D is less than or equal to 30cm.
Receiving antenna 2 is toroidal magnetic field test antenna, dipole antenna or microwave horn antenna, and it receives the test frequency range is 9KHz to 40GHz.
Receiving instrument 3 is receiver or frequency spectrograph.
The coaxial cable 5 that connects each several part in the device is the coaxial cables that can satisfy 9KHz to 40GHz test.
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 radio-frequency leakage.
This radio-frequency leakage 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. radio-frequency leakage method of testing, its equipment comprises radio frequency conversion equipment (1), receiving 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 signal source (4) conducting, they are arranged on outside 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 by flange; Receiving antenna (2) is by coaxial cable (5) and receiving instrument (3) conducting, and they are arranged in the screened room (6), and receiving antenna (2) is over against the test via hole of screened room (6) body of wall, and the distance between receiving antenna (2) top and test via hole is D; This radio-frequency leakage method of testing is carried out according to following step:
Step 1 is surveyed straight-through value; Signal source (4) is sent signal, incident wave is imported into the inside of screened room (6) through radio frequency conversion equipment (1) along the test via hole of screened room (6), and is received by receiving antenna (2), locates to obtain straight-through value at receiving instrument (3);
Step 2 is surveyed actual value; Measured device (7) is arranged on the interior test via hole place of screened room (6), installs shielding gasket additional between the surface of contact of measured device (7) and screened room (6) body of wall; After setting measured device (7), signal source (4) is sent signal, incident wave is imported into the inside of screened room (6) through radio frequency conversion equipment (1) along the test via hole of screened room (6), incident wave is by behind the measured device (7), received by receiving antenna (2), locate to obtain actual value at receiving instrument (3);
Step 3 is calculated the radio-frequency leakage amount; The straight-through value that obtains with step 1 deducts the actual value that step 2 obtains, and calculates the radio-frequency leakage amount.
2. a kind of radio-frequency leakage 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, exterior wall by screw and screened room (6) is fixed, and installs conductive gasket additional between the exterior wall of metal flange and screened room (6).
3. a kind of radio-frequency leakage method of testing described in according to claim 1, it is characterized in that: described receiving antenna (2) is toroidal magnetic field test antenna, dipole antenna or microwave horn antenna, it receives test frequency range is 9KHz to 40GHz.
4. a kind of radio-frequency leakage 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 radio-frequency leakage 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 radio-frequency leakage 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 radio-frequency leakage 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 radio-frequency leakage method of testing described in according to claim 1, it is characterized in that: the distance D between described receiving 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 |
|---|---|---|---|
| CN2012104126264A CN102955085A (en) | 2012-10-25 | 2012-10-25 | Radio frequency leakage test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104126264A CN102955085A (en) | 2012-10-25 | 2012-10-25 | Radio frequency leakage test method |
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|---|---|
| CN102955085A true CN102955085A (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104126264A Pending CN102955085A (en) | 2012-10-25 | 2012-10-25 | Radio frequency leakage test method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018072458A1 (en) * | 2016-10-17 | 2018-04-26 | 华讯方舟科技有限公司 | Microwave converter input isolation testing method and system |
| WO2019179499A1 (en) * | 2018-03-22 | 2019-09-26 | 中兴通讯股份有限公司 | Radio frequency test probe, radio frequency test system and method |
| CN116209235A (en) * | 2023-05-05 | 2023-06-02 | 北京航天天美科技有限公司 | Performance optimization method of special cabinet with high reliability for military use |
Citations (5)
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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 CN2012104126264A patent/CN102955085A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Non-Patent Citations (2)
| Title |
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| 殷海成 等: "射频同轴电缆屏蔽衰减测试方法的比较", 《光纤与电缆及其应用技术》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018072458A1 (en) * | 2016-10-17 | 2018-04-26 | 华讯方舟科技有限公司 | Microwave converter input isolation testing method and system |
| WO2019179499A1 (en) * | 2018-03-22 | 2019-09-26 | 中兴通讯股份有限公司 | Radio frequency test probe, radio frequency test system and method |
| CN116209235A (en) * | 2023-05-05 | 2023-06-02 | 北京航天天美科技有限公司 | Performance optimization method of special cabinet with high reliability for military use |
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Application publication date: 20130306 |