CN202916358U - Waveguide switch shielding effectiveness test device - Google Patents
Waveguide switch shielding effectiveness test device Download PDFInfo
- Publication number
- CN202916358U CN202916358U CN 201220550831 CN201220550831U CN202916358U CN 202916358 U CN202916358 U CN 202916358U CN 201220550831 CN201220550831 CN 201220550831 CN 201220550831 U CN201220550831 U CN 201220550831U CN 202916358 U CN202916358 U CN 202916358U
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- China
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- waveguide switch
- test
- radio frequency
- screened room
- shield effectiveness
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Abstract
The utility model relates to the technical field of electronic tests and shielding effectiveness tests, and discloses a waveguide switch shielding effectiveness test device. The waveguide switch shielding effectiveness test device comprises a radio frequency conversion device, a transmitting antenna, a receiver, a signal source, coaxial cables and a shielding room. The waveguide switch shielding effectiveness test device is characterized in that the radio frequency conversion device is in conduction with the receiver through a coaxial cable, the radio frequency conversion device and the receiver are arranged inside the shielding room, the radio frequency conversion device is fixed at the position of a test via hole in the wall of the shielding room; the signal source is in conduction with the transmitting antenna through a coaxial cable, the signal source and the transmitting antenna are arranged outside the shielding room, the transmitting antenna faces the test via hole in the wall of the shielding room directly, the distance between the top of the transmitting antenna and the test via hole is D; and the shielding effectiveness test is performed according to three steps, including the direct conduction value measuring step, the actual value measuring step and the shielding effectiveness calculation step. According to the waveguide switch shielding effectiveness test method, the result is acquired by subtracting the actual receiving value from the direct conduction value, so the final test result has advantages of high accuracy and small error.
Description
Technical field
The utility model relates to Electronic Testing and shield effectiveness technical field of measurement and test, is a kind of waveguide switch shield effectiveness proving installation.
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 proving installation.
Summary of the invention
The purpose of this utility model provides a kind of waveguide switch shield effectiveness proving installation, and 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.
The technical solution of the utility model is a kind of waveguide switch shield effectiveness proving installation, 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.
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 B of described emitting antenna top and test via hole is less than or equal to 30 centimetres.
But characteristics of the present utility model 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 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
Below in conjunction with embodiment the utility model is further described.
Fig. 1 is during without measured device, the device synoptic diagram of waveguide switch shield effectiveness method of testing.
Fig. 2 is when measured device is arranged, the device synoptic 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 proving installation, 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 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 proving installation, it 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.
2. a kind of waveguide switch shield effectiveness proving installation 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 proving installation 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 proving installation 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 proving installation 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 proving installation 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 proving installation 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 proving installation described in according to claim 1 is characterized in that: the distance B 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 |
|---|---|---|---|
| CN 201220550831 CN202916358U (en) | 2012-10-25 | 2012-10-25 | Waveguide switch shielding effectiveness test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220550831 CN202916358U (en) | 2012-10-25 | 2012-10-25 | Waveguide switch shielding effectiveness test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202916358U true CN202916358U (en) | 2013-05-01 |
Family
ID=48164661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220550831 Expired - Fee Related CN202916358U (en) | 2012-10-25 | 2012-10-25 | Waveguide switch shielding effectiveness test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202916358U (en) |
-
2012
- 2012-10-25 CN CN 201220550831 patent/CN202916358U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130501 Termination date: 20141025 |
|
| EXPY | Termination of patent right or utility model |