CN102520262B - Device and method for testing radio-frequency waveguide of deep space aircraft - Google Patents
Device and method for testing radio-frequency waveguide of deep space aircraft Download PDFInfo
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- CN102520262B CN102520262B CN201110362482.1A CN201110362482A CN102520262B CN 102520262 B CN102520262 B CN 102520262B CN 201110362482 A CN201110362482 A CN 201110362482A CN 102520262 B CN102520262 B CN 102520262B
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Abstract
The invention relates to a device for testing the radio-frequency waveguide of a deep space aircraft. The device comprises a upstream part and a downstream part, wherein the upstream part comprises a shielding cavity for shielding wireless signals; the shielding cavity is of a hollow barrel shape, the bottom face and the top face of the shielding cavity are respectively provided with a through hole, and the two through holes are used for the insertion of a receiving antenna of the deep space aircraft and a transmitting antenna of the ground respectively; the inner part of the shielding cavity is coated with a wave-absorbing material; the downstream part comprises an adapter waveguider for shielding a wireless signal and a waveguide coaxial converter for converting the wireless signal into an electric signal transmitted in a wired cable; the adapter waveguider is a hollow tubular connecting cavity, one end of the adapter waveguider is connected with the transmitting antenna of the deep space aircraft, and the other end of the adapter waveguider is connected to the input end of the waveguide coaxial converter; and the output end of the waveguide coaxial converter is connected to a ground testing device through the wired cable.
Description
Technical field
The present invention relates to spacecraft radio frequency testing field, particularly a kind of radio-frequency waveguide of deep space aircraft proving installation.
Background technology
In order to ensure the safety and reliability of space travel, spacecraft all will do a large amount of tests before transmission, and spacecraft radio frequency testing is exactly one wherein.In the prior art, spacecraft radio frequency testing divides wired test, wireless test.Wire radio test refers to that the Receiver And Transmitter of spacecraft connects high frequency cable and carries out radio frequency testing to ground checkout equipment, and the method exists test imperfect (not comprising antenna part), high frequency connector repeatedly will plug problems such as reducing reliability; Less radio-frequency test refers to that the antenna of spacecraft and ground-plane antenna carry out wireless connections test, the method is for deep-space spacecraft, because the energy of wireless electromagnetic wave radiation is huge, tester and operating personnel can not nearby work, therefore need to carry out testing (i.e. EMC factory building) at special electromagnetic wave shielding factory building, having spacecraft needs to turn the problem such as factory's rewiring, workload be large.
Summary of the invention
The present invention seeks to overcome existing deep-space spacecraft radio frequency test method or test imperfect, reliability is lower, or the defect easily damaged human body, thus the proving installation providing a kind of security high, easy to use and method of testing.
In order to reach foregoing invention object, the invention provides a kind of radio-frequency waveguide of deep space aircraft proving installation, comprising ascender and descender; Wherein,
Described ascender comprises the shielding cavity for shielding wireless signal; Described shielding cavity becomes the tubbiness of hollow, has a through hole separately in bottom surface and end face, and these two through holes are respectively used to assign the receiving antenna of described deep-space spacecraft and the emitting antenna on ground; The inside of described shielding cavity scribbles absorbing material;
Described descender comprises the transition waveguide for shielding wireless signal and the waveguide coaxial connecter for wireless signal being converted to the electric signal transmitted in wire cable; Described transition waveguide is the tubulose connection chamber of a hollow, and its one end is connected to the emitting antenna of described deep-space spacecraft, and its other end is connected to the input end of described waveguide coaxial connecter; The output terminal of described waveguide coaxial connecter is connected to the testing apparatus on ground by wire cable.
In technique scheme, the inwall of described transition waveguide scribbles absorbing material.
In technique scheme, the size of the through hole in described shielding cavity is consistent with the outside dimension of the receiving antenna of described deep-space spacecraft, ground launch antenna, makes can closely cooperate between them.
Present invention also offers a kind of method utilizing described radio-frequency waveguide of deep space aircraft proving installation to carry out radio-frequency plumbing test, comprise the test to uplink communication links and the test to downstream communications link;
The method of testing of uplink communication links is comprised:
Step 1-1), radio-frequency plumbing proving installation ascender is connected between the receiving antenna of deep-space spacecraft in uplink communication links and ground launch antenna;
Step 1-2), the performance index of antenna are tested, to confirm step 1-1) whether the connection that completes normal;
Step 1-3), the receiving antenna of command receiver with described deep-space spacecraft is connected, described ground launch antenna is connected with ground upstream transmitter;
Step 1-4), ground upstream transmitter start work;
Step 1-5), command receiver start work, receive ground up-on command data;
Step 1-6), the electromagnetic leakage intensity of testing radio frequency waveguide test device ascender periphery;
The method of testing of downstream communications link is comprised:
Step 2-1), between emitting antenna that radio-frequency plumbing proving installation descender is connected to deep-space spacecraft in downstream communications link and ground checkout equipment;
Step 2-2), the performance index of antenna are tested, to confirm step 2-1) whether the connection that completes normal;
Step 2-3), command transmitter is connected to the emitting antenna of described deep-space spacecraft;
Step 2-4), command transmitter start work;
Step 2-5), command receiver start work, receive downlink command data;
Step 2-6), the electromagnetic leakage intensity of testing radio frequency waveguide test device descender periphery.
In technique scheme, in step 1-2) in, the performance index of described antenna comprise up standing-wave ratio (SWR) and loss; In step 2-2) in, the performance index of described antenna comprise descending standing-wave ratio (SWR) and loss.
Method of testing of the present invention and proving installation are through having gone sufficient checking on China's first Mars probes, and at emitting antenna 1 meter of from 63W, the safety index that electromagnetic radiation can be born than human body in GB is low more than 2100 times.Under personnel's near work state, total power radio frequency testing can be carried out.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of radio-frequency plumbing Test Application scene;
Fig. 2 is the structural representation of radio-frequency plumbing proving installation descender of the present invention;
Fig. 3 is the structural representation of radio-frequency plumbing proving installation ascender of the present invention;
Fig. 4 is the scheme of installation of radio-frequency plumbing proving installation descender of the present invention in down traffic link;
Fig. 5 is the scheme of installation of radio-frequency plumbing proving installation ascender of the present invention in uplink communication links.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Satellite is a kind of deep-space spacecraft the most common, in the following embodiments just for satellite, is described radio-frequency plumbing proving installation of the present invention.
With reference to figure 1, first the application scenarios of radio-frequency plumbing proving installation of the present invention is described.
The communication process on satellite and ground comprises uplink communication and downlink communication, and described uplink communication refers to that ground-launched wireless signal uploads to satellite, receive by the wireless antenna of satellite; Described downlink communication refers to that wireless signal that the emitting antenna of satellite launches is by ground receiver.Radio-frequency plumbing proving installation of the present invention needs to be tested respectively above-mentioned uplink communication process and downlink communication process when carrying out radio-frequency plumbing test.Therefore, this proving installation comprises ascender and descender.
In fig. 2, radio frequency waveguide test device descender is described in detail.Described descender comprises transition waveguide and waveguide coaxial connecter.Described transition waveguide is the tubulose connection chamber of a hollow, and play the effect of shielding wireless signal, described waveguide coaxial connecter is then for converting the wire signal of Coaxial Cables to by wireless signal.As the preferred implementation of one, the inwall of transition waveguide scribbles absorbing material.
Before satellite being done to radio-frequency plumbing test, need first radio-frequency plumbing proving installation descender to be connected in downlink.As shown in Figure 2, by clip and clamp nut, the emitting antenna of satellite is connected to one end of transition waveguide, the other end of described transition waveguide is connected with the input end of waveguide coaxial connecter by clip, clamp nut equally.The output terminal of described waveguide coaxial connecter is connected on the cable that is connected with ground checkout equipment.Connection between above-mentioned emitting antenna, transition waveguide, waveguide coaxial connecter should be airtight as much as possible, to prevent the leakage of wireless signal.
Radio-frequency plumbing proving installation descender is being connected to after in communication link, is also needing to test the performance index of antenna and waveguide coaxial connecter, whether normal to confirm connection.As shown in Figure 2, before testing, need to adopt network analyzer to receive standing-wave ratio (SWR) and the loss of emitting antenna in radio-frequency plumbing proving installation descender of emitting antenna port, in an example, descending standing-wave ratio (SWR) 1.2G, loss-1dB.After standing-wave ratio (SWR) and loss have been tested, as shown in Figure 4, command transmitter is connected with the low gain emitting antenna of satellite by launched microwave switch, antenna microwave switch successively, descender is connected with ground test cable, after connect ground checkout equipment.Command transmitter on last satellite is started working, and ground testing apparatus receives downlink command data, and tests the electromagnetic leakage intensity of peripheral space simultaneously.
In figure 3, radio frequency waveguide test device ascender is described in detail.Described ascender comprises shielding cavity, and described shielding cavity becomes the tubbiness of hollow, but has through hole in bottom surface and end face, and these two through holes are respectively used to assign the receiving antenna of satellite and the emitting antenna on ground.The size of described through hole should be consistent as far as possible with the outside dimension of satellite earth antenna, ground launch antenna, makes can closely cooperate between them.Absorbing material is scribbled in the inside of shielding cavity.
Before satellite being done to radio-frequency plumbing test, need first radio-frequency plumbing proving installation ascender to be connected in up-link.As shown in Figure 3; the receiving antenna outside surface of satellite needs the part paper self-adhesive tape be connected with shielding cavity to be protected; then two semicircular geometrical clamps are installed at the position being enclosed with paper self-adhesive tape at receiving antenna; these two geometrical clamps are fixed by lock-screw, should be noted that the screw thread coupling of two geometrical clamps is good when mounted.Receiving antenna is assigned the corresponding through hole into shielding cavity, shielding cavity is directly connected and fixed with receiving antenna geometrical clamp by screw thread, recycles clip and reinforces at the receiving antenna of satellite and the coupling part of shielding cavity, prevent the leakage of wireless signal as far as possible.The connection between the emitting antenna on ground and shielding cavity can be realized in a similar fashion.Although in figure 3, the receiving antenna of satellite is low gain receiving antenna, but high-gain receiving antenna adopts the ascender of radio-frequency plumbing proving installation equally, be that the size of through hole on the size of shielding cavity, shielding cavity etc. needs to be adjusted according to high-gain receiving antenna.
Radio-frequency plumbing proving installation ascender is being connected to after in communication link, is also needing to test the performance index of antenna, whether normal to confirm connection.As shown in Figure 3, the loss after using network analyzer test receiving antenna port standing-wave ratio (SWR) to be connected with shielding cavity with receiving antenna.In an example, up standing-wave ratio (SWR) 1.1G, loss-23dB.Up standing-wave ratio (SWR) obtained herein and the descending standing-wave ratio (SWR) calculated before all meet the requirement that standing-wave ratio (SWR) is less than 1.5.But because up shielding cavity is large, therefore aerial loss is also large.After standing-wave ratio (SWR) and loss have been tested, as shown in Figure 5, use satellite high frequency cable to be connected and fixed command receiver and receiving antenna, shielding cavity is connected with ground test cable, after connect ground upstream transmitter.Ground upstream transmitter start work, by adding the mode of cable and attenuator between transmitter and shielding cavity, realizes the requirement of shielding cavity input port signal intensity about-110dBmW.Receiver start work is tested, and receives ground up-on command data.And test the electromagnetic leakage intensity of shielding cavity peripheral space simultaneously.
In the radio-frequency plumbing test process shown in Fig. 4, Fig. 5, the transmission of wireless signal all completes with reception in radio-frequency plumbing proving installation, and radio-frequency plumbing proving installation can be shielded the wireless signal in transmitting procedure, efficiently avoid the leakage of wireless signal.Electromagnetic screen testing apparatus can be installed in dotted line frame position in FIG, and test result shows that the safety index that electromagnetic radiation can be born than human body in GB is low more than 2100 times at emitting antenna 1 meter of from 63W.
Claims (2)
1. a radio-frequency waveguide of deep space aircraft proving installation, is characterized in that, comprises ascender and descender; Wherein,
Described ascender comprises the shielding cavity for shielding wireless signal; Described shielding cavity becomes the tubbiness of hollow, has a through hole separately in bottom surface and end face, and these two through holes are respectively used to assign the receiving antenna of described deep-space spacecraft and the emitting antenna on ground; The inside of described shielding cavity scribbles absorbing material;
The size of the through hole in described shielding cavity is consistent with the outside dimension of the receiving antenna of described deep-space spacecraft, ground launch antenna, makes can closely cooperate between them;
Described descender comprises the transition waveguide for shielding wireless signal and the waveguide coaxial connecter for wireless signal being converted to the electric signal transmitted in wire cable; Described transition waveguide is the tubulose connection chamber of a hollow, and its one end is connected to the emitting antenna of described deep-space spacecraft, and its other end is connected to the input end of described waveguide coaxial connecter; The output terminal of described waveguide coaxial connecter is connected to the testing apparatus on ground by wire cable; The inwall of described transition waveguide scribbles absorbing material.
2. utilize the radio-frequency waveguide of deep space aircraft proving installation of claim 1 to carry out a method for radio-frequency plumbing test, comprise the test to uplink communication links and the test to downstream communications link;
The method of testing of uplink communication links is comprised:
Step 1-1), radio-frequency plumbing proving installation ascender is connected between the receiving antenna of deep-space spacecraft in uplink communication links and ground launch antenna;
Step 1-2), the performance index of antenna are tested, to confirm step 1-1) whether the connection that completes normal;
Step 1-3), the receiving antenna of command receiver with described deep-space spacecraft is connected, described ground launch antenna is connected with ground upstream transmitter;
Step 1-4), ground upstream transmitter start work;
Step 1-5), command receiver start work, receive ground up-on command data;
Step 1-6), the electromagnetic leakage intensity of testing radio frequency waveguide test device ascender periphery;
The method of testing of downstream communications link is comprised:
Step 2-1), between emitting antenna that radio-frequency plumbing proving installation descender is connected to deep-space spacecraft in downstream communications link and ground checkout equipment;
Step 2-2), the performance index of antenna are tested, to confirm step 2-1) whether the connection that completes normal;
Step 2-3), command transmitter is connected to the emitting antenna of described deep-space spacecraft;
Step 2-4), command transmitter start work;
Step 2-5), command transmitter starts working, ground checkout equipment receives downlink command data;
Step 2-6), the electromagnetic leakage intensity of testing radio frequency waveguide test device descender periphery;
In step 1-2) in, the performance index of described antenna comprise up standing-wave ratio (SWR) and loss; In step 2-2) in, the performance index of described antenna comprise descending standing-wave ratio (SWR) and loss.
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| CN201110362482.1A CN102520262B (en) | 2011-11-15 | 2011-11-15 | Device and method for testing radio-frequency waveguide of deep space aircraft |
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| CN102520262B true CN102520262B (en) | 2015-03-11 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103675501A (en) * | 2012-09-21 | 2014-03-26 | 北京航天长征飞行器研究所 | Wireless transmission waveguide test device |
| CN102981065B (en) * | 2012-11-02 | 2014-12-10 | 中原工学院 | Sectioned tubular measurement device and test method for shielding effectiveness of electromagnetic shielding fabric |
| CN103051396A (en) * | 2012-12-11 | 2013-04-17 | 上海卫星工程研究所 | Test method of deep-space high-stability beacon |
| CN103840897B (en) * | 2014-02-28 | 2016-05-11 | 北京航天飞行控制中心 | A kind of deep space link allowance modification method |
| CN104462188B (en) * | 2014-10-23 | 2017-09-12 | 北京空间飞行器总体设计部 | A kind of method of testing and system of the planning of spacecraft intelligent task |
| CN113113772B (en) * | 2021-04-06 | 2022-08-19 | 上海航天测控通信研究所 | Waveguide antenna adapter for satellite wireless test |
| CN113815909B (en) * | 2021-09-09 | 2023-10-27 | 中国人民解放军63920部队 | Uplink determining method and device for peer-to-peer mode combination configuration spacecraft |
| CN114024883B (en) * | 2021-11-05 | 2023-11-17 | 江西洪都航空工业集团有限责任公司 | Method, device and system for open-loop parallel testing of multiple products of data link |
| CN114465672B (en) * | 2022-01-14 | 2023-12-12 | 上海卫星工程研究所 | Test method and system for radio frequency forwarding system of Mars detector emission field emission area |
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| US20060199543A1 (en) * | 2005-03-04 | 2006-09-07 | Raysat Cyprus Ltd. | Low cost indoor test facility and method for mobile satellite antennas |
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| US20100109957A1 (en) * | 2008-11-04 | 2010-05-06 | Electronics And Telecommunications Research Institute | Apparatus for measuring antenna radiation performance and method of designing the same |
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| US6188365B1 (en) * | 1998-03-13 | 2001-02-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Testing device and method |
| US20060199543A1 (en) * | 2005-03-04 | 2006-09-07 | Raysat Cyprus Ltd. | Low cost indoor test facility and method for mobile satellite antennas |
| US20100109957A1 (en) * | 2008-11-04 | 2010-05-06 | Electronics And Telecommunications Research Institute | Apparatus for measuring antenna radiation performance and method of designing the same |
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