CN112834833A - Compact range antenna test system - Google Patents
Compact range antenna test system Download PDFInfo
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- CN112834833A CN112834833A CN202110343262.8A CN202110343262A CN112834833A CN 112834833 A CN112834833 A CN 112834833A CN 202110343262 A CN202110343262 A CN 202110343262A CN 112834833 A CN112834833 A CN 112834833A
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- manipulator
- reflector
- compact range
- range antenna
- testing system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
- G01R29/105—Radiation diagrams of antennas using anechoic chambers; Chambers or open field sites used therefor
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- General Physics & Mathematics (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention provides a compact range antenna testing system which comprises a microwave darkroom, a first mechanical arm, a second mechanical arm, a reflector and a feed source, wherein the first mechanical arm, the second mechanical arm, the reflector and the feed source are all arranged in the microwave darkroom, the reflector is arranged on the first mechanical arm, the feed source is arranged on the second mechanical arm and faces the reflector, the reflector is used for focusing emergent waves emitted by the feed source into plane waves and reflecting the plane waves to a part to be tested to form a quiet zone, the first mechanical arm can drive the reflector to move, and the second mechanical arm can drive the feed source to move according to the moving position of the reflector so as to realize translation of the quiet zone. In the compact range antenna test system provided by the invention, the reflector and the feed source are respectively driven to move by the first manipulator and the second manipulator, and the translation of the quiet zone can be realized by combining the real-time matching alignment of the reflector and the feed source, so that a plurality of quiet zones which can be spliced with each other are formed, the space of the quiet zones is multiplied, and the test performance is improved.
Description
Technical Field
The invention relates to the field of antenna testing, in particular to a compact range antenna testing system.
Background
At present, because the indoor far-field distance is difficult to meet the test of a large-caliber antenna, particularly a high-frequency and millimeter-wave antenna, an indirect far-field test method is generally adopted for testing. For example, the compact range antenna test method mainly uses a lens or a paraboloid to enable rays emitted by a point source or a line source to be emitted to an antenna to be tested in parallel, a quasi-plane wave radiation field is generated in a small space, and the near simulation plane wave radiation condition can enable indoor measurement to meet the antenna measurement far-field condition.
In a compact range antenna test system, an approximate plane wave area formed by a reflecting surface is called as a quiet area, an electromagnetic field in the quiet area has small amplitude and phase fluctuation, the plane wave area is less disturbed, the distribution of the plane wave amplitude and the phase meets certain index requirements, the plane wave area can be approximately regarded as a plane wave radiation environment, and the antenna measurement requirements are met. Therefore, in a compact range, the size of a dead zone is an important index reflecting the performance of a compact range testing system, the aperture field distribution of a reflecting surface is influenced by space attenuation and a feed source directional diagram, the aperture utilization rate of the single-reflector compact range is very low due to inconsistent wave front amplitude distribution of primary radiation on the reflecting surface and the diffraction effect existing at the edge of the reflecting surface, and the size of the existing dead zone is only about 30% of that of the reflecting surface generally.
For this reason, the common methods for improving the aperture utilization ratio of the compact range of the reflector generally include: 1) adopting proper parabolic edge treatment, namely adopting sawtooth, cosine and curled edge; 2) a corrugated horn of a gaussian beam is used as a feed source. However, in the existing improvement mode, the improved edge processing mode cannot fully compensate the parabolic aperture field distribution, and the feed source radiation also has large taper, so that the aperture utilization rate of the single reflector compact field is still lower than 60%, and the size of a required dead zone is increased along with the increase of the size of the antenna to be measured, so that the aperture of the single reflector compact field reflector is also forced to be increased greatly, the processing difficulty and the manufacturing cost of the paraboloid are undoubtedly increased, and the problem that the large-aperture paraboloid cannot be integrally processed and molded and the like is caused.
Disclosure of Invention
The invention aims to provide a compact range antenna test system capable of increasing the dead space.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a compact range antenna test system, includes the microwave darkroom to and all locate first manipulator, second manipulator, speculum and feed in the microwave darkroom, the speculum is located on the first manipulator, the feed is located on the second manipulator and towards the speculum sets up, the speculum is used for with the outgoing wave focus that the feed sent becomes the plane wave and reflects the plane wave to the piece department that awaits measuring and form the quiet zone, first manipulator can drive the speculum removes, the second manipulator can be according to the shift position of speculum drives the feed removes in order to realize the translation the quiet zone.
Preferably, the first manipulator and the second manipulator are both multi-axis manipulators, and the positions of the quiet zones can be changed along the vertical, left and right, front and back axial directions in a mutually matched and movable manner.
Preferably, the compact range antenna test system further comprises a to-be-tested piece turntable for fixing the to-be-tested piece and driving the to-be-tested piece to rotate.
More preferably, compact range antenna test system still including erect in bracing piece in the microwave dark room, the bracing piece is including dodging the section, dodge the section along following the orientation up down first manipulator slope or buckle the setting, the revolving stage of awaiting measuring is located dodge the top of section.
Preferably, the compact range antenna testing system further comprises a first wave absorbing baffle laid between the second manipulator and the reflector.
Preferably, the compact range antenna test system further comprises a second wave-absorbing baffle laid between the supporting rod and the reflector.
Furthermore, the microwave dark room comprises a shielding room made of metal materials and a wave-absorbing material attached in the shielding room.
Preferably, the reflector is made of an aluminum alloy material, and the caliber of the reflector is equal to or less than 1.2 meters.
Preferably, compact range antenna test system still including locating first manipulator with link between the speculum, the link include with fixed plate that first manipulator is connected with lay many connecting rods on the fixed plate, the connecting rod is kept away from the one end of fixed plate with the speculum is connected.
Preferably, the feed source is a pyramidal horn feed source.
Compared with the prior art, the scheme of the invention has the following advantages:
in the compact range antenna test system provided by the invention, the reflector and the feed source are respectively driven to move by the first manipulator and the second manipulator, and the translation of the quiet zone can be realized by combining the real-time matching alignment of the reflector and the feed source, so that a plurality of quiet zones which can be spliced with each other are formed, the quiet zone space is multiplied, the test of antennas with more specifications can be adapted, and the accuracy of the test result is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a front view of a compact range antenna test system provided by an embodiment of the present invention;
FIG. 2 is a state diagram of a variation of the compact range antenna test system shown in FIG. 1;
FIG. 3 is a perspective view of the compact range antenna testing system shown in FIG. 1;
FIG. 4 is a schematic illustration of a dead-zone splice of the compact range antenna test system shown in FIG. 1.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
It will be understood by those within the art that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
Fig. 1 to 4 collectively illustrate a compact range antenna test system provided by an embodiment of the present invention, which is used for implementing antenna test under a simulated plane wave radiation condition in a small space, can provide a quiet zone environment required for all-weather antenna test, has a large quiet zone space, is excellent in performance, can adapt to test of antennas of various specifications, and is accurate in test.
As shown in FIG. 1, the compact range antenna testing system 1 comprises a microwave darkroom 11, a first mechanical arm 12, a second mechanical arm 13, a reflector 14, a feed source 15 and a rotating table 16 of a piece to be tested. The first mechanical arm 12, the second mechanical arm 13, the reflecting mirror 14, the feed source 15 and the rotary table 16 of the piece to be measured are all arranged in the microwave darkroom 11, and the microwave darkroom 11 is used for eliminating external electromagnetic interference and providing a pure free space environment.
Specifically, speculum 14 is located on first manipulator 12, second manipulator 13 is used for installing feed 15 and will feed 15 aligns speculum 14, a revolving stage 15 that awaits measuring is used for placing and fixed 2 that await measuring, speculum 14 can with the outgoing wave focus one-tenth plane wave that feed 15 sent and with the plane wave reflection extremely 2 departments that await measuring form quiet zone 100, 2 that await measuring can be the antenna or carry the electronic product of antenna, through quiet zone 100 realizes application scenarios such as antenna directional diagram test, RCS test of 2 that await measuring.
Further, the first manipulator 12 can drive the reflecting mirror 14 to move, and the second manipulator 13 can drive the feed source 15 to move along with the reflecting mirror 14 according to the moving position of the reflecting mirror 14, so that the feed source 15 is kept in a state of being aligned with the reflecting mirror 14 in a matching manner. Thereby pass through first manipulator 12 with second manipulator 13 drives respectively speculum 14, feed 15 remove to combine speculum 14 with feed 15's real-time matching is aimed at, realize the translation of quiet zone 100, and then can be right the other positions of the piece 2 that awaits measuring test.
Referring to fig. 2, when the first manipulator 12 drives the reflector 14 to move to three different positions along the vertical direction, the second manipulator 13 drives the feed source 15 to move so as to keep matching alignment with the reflector 14, so that three vertically arranged quiet zones 100 are respectively formed on the turntable 15 of the to-be-tested part, in practical application, the three quiet zones 100 can be spliced to form a larger quiet zone space, and the quiet zone space can be multiplied without using a severely designed turned edge reflector or a gaussian beam feed source, so that the utilization rate of the reflector 14 is effectively improved, and the antenna testing procedures of different specifications and sizes can be adapted, and the accuracy of the testing result is ensured.
Preferably, the first manipulator 12 and the second manipulator 13 are both multi-axis manipulators, which can flexibly position coordinate positions and azimuth directions in a three-dimensional space, and can drive the reflector 14 or the feed source 15 to any position and any angle with high precision, so that the position of the quiet zone 100 can be changed along three axial directions, namely, up and down, left and right, and front and back, in a manner of mutually matching and moving.
As shown in fig. 3, when the first manipulator 12 drives the reflector 14 to move horizontally to three different positions, the second manipulator 13 drives the feed source 15 to move so that the feed source keeps matching with the reflector 14, at this time, the three vertically arranged quiet zones 100 can be horizontally expanded into nine quiet zones 100, a larger quiet zone space is formed by splicing more quiet zones 100, and the utilization rate of the reflector 14 is further improved.
Referring to fig. 4, when the first manipulator 12 drives the reflector 14 to move to three different positions along the front-back direction, the nine quiet zones 100 can be further expanded into twenty-seven quiet zones 100 along the depth direction, so as to further increase the effective quiet zone space.
Preferably, the reflector 14 is made of an aluminum alloy material and has a caliber equal to or less than 1.2 meters. The structure intensity and the light weight are ensured while the convergence and reflection effects on radiation signals are ensured, and the compact range antenna test system 1 can translate and splice the quiet zone 100 without adopting a structure with a larger caliber, so that the manufacturing difficulty and the production cost are effectively reduced.
In this embodiment, the aperture of the reflecting mirror 14 is 1.2 meters, the weight of the reflecting mirror is 180kg, and the first manipulator 12 is a heavy robot, which can drive the reflecting mirror 14 to move along three axial directions by no less than 2 meters; the second manipulator 13 is a small robot, which can drive the feed source 15 to move along three axial directions by a stroke not less than 0.4 m, and the second manipulator 13 can pre-store data through software to inquire the feed source 15 relative to the reflector 14 in real time. Assuming that the aperture utilization rate of the reflector 14 is 33%, the reflector can form a dead zone of 400mm on the turntable 16 of the to-be-measured part with the radiation signal emitted by the feed source 15, and the three dead zones are spliced to form a dead zone space of 1.2 meters, so that the utilization rate can reach 100%.
Preferably, the feed 15 is a pyramid horn feed, and because this compact range antenna test system 1 can realize a plurality of quiet zone spaces timesharing, realizes the expansion of quiet zone through the concatenation in quiet zone space, reaches the purpose that improves the quiet zone utilization ratio at double, consequently need not to dispose the gaussian beam feed, uses conventional pyramid horn feed alright satisfy the test demand, has greatly reduced compact range antenna test system 1's construction cost and use cost.
As shown in fig. 3, the turntable 16 to be tested is a single-axis turntable, and includes a horizontally disposed mounting platform 161 and a driving component 162 for driving the mounting platform 161 to rotate on a horizontal plane, the mounting platform 161 is used for mounting the piece to be tested 2, and the driving component 162 can drive the mounting platform 161 to rotate and drive the piece to be tested 2 to realize 360-degree rotation of the orientation, so as to realize testing of more application scenarios.
The compact range antenna test system 1 further comprises a support rod 17, wherein the support rod 17 is vertically arranged in the microwave darkroom 11 and supports the turntable 16 of the piece to be tested.
Preferably, the bracing piece 17 includes dodges the section 171, dodge section 171 along from the orientation up orientation down the slope of first manipulator 12 or the setting of buckling, a revolving stage 16 that awaits measuring is located dodge the top of section 171, through dodge section 171 makes bracing piece 17 keeps away from test signal's radiation range as far as possible to make it have less back vision reflection, avoid causing the influence to the test result.
Furthermore, the anechoic chamber 11 comprises a shielding chamber (not shown, the same below) made of a metal material and a wave-absorbing material (not shown, the same below) attached in the shielding chamber, and the anechoic chamber 11 simulates a free space environment, so that all-weather antenna test work can be realized without being interfered by external environmental factors. Secondly, the microwave darkroom 11 can also effectively prevent the interference of external electromagnetic waves, so that the internal test operation is not influenced by the external electromagnetic environment, and the internal test signal can be prevented from radiating outwards to form an interference source, thereby avoiding polluting the surrounding electromagnetic environment and ensuring that each test device can work normally.
Preferably, the compact range antenna test system 1 further includes a wave absorbing baffle 18, the wave absorbing baffle 18 includes a first wave absorbing baffle 181 laid in the horizontal direction between the second manipulator 13 and the reflector 14, and a second wave absorbing baffle 182 laid in the vertical direction between the support rod 17 and the reflector 14, and the metal structures such as the servo system, the manipulator, the support rod and the like on the signal radiation path of the feed source 15 are isolated and absorbed by the first wave absorbing baffle 181 and the second wave absorbing baffle 182, so as to meet the test environment requirements.
As shown in fig. 3, the compact range antenna testing system 1 further includes a connecting frame 19, the connecting frame 19 is disposed on the first manipulator 12 and is used for installing the reflector 14, the connecting frame 19 includes a fixing plate 191 connected to the first manipulator 12 and a plurality of connecting rods 192 disposed on the fixing plate 191 at intervals, one end of the connecting rod 192, which is away from the fixing plate 191, is connected to the reflector 14, and the connecting rods 192 are connected to the reflector 14, so as to ensure the connection strength and stability of the reflector 14, thereby preventing the first manipulator 12 from shaking or loosening when driving the reflector 14 to move, and ensuring the transmission precision and the positioning precision of the first manipulator 12 to the reflector 14.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a compact range antenna test system, a serial communication port, include the microwave darkroom to and all locate first manipulator, second manipulator, speculum and feed in the microwave darkroom, the speculum is located on the first manipulator, the feed is located go up and move towards on the second manipulator the speculum sets up, the speculum be used for with the outgoing wave focus that the feed sent becomes the plane wave and reflects the plane wave to a waiting to measure department and form the quiet zone, first manipulator can drive the speculum removes, the second manipulator can be according to the shift position of speculum drives the feed removes in order to realize the translation the quiet zone.
2. The compact range antenna testing system of claim 1, wherein the first and second manipulators are multi-axis manipulators, and the first and second manipulators are configured to move in cooperation with each other to change the position of the quiet zone along three axial directions, i.e., up and down, left and right, and front and back.
3. The compact range antenna testing system of claim 1, further comprising a to-be-tested piece turntable for holding the to-be-tested piece and driving the to-be-tested piece to rotate.
4. The compact range antenna testing system of claim 3, further comprising a support rod erected in the microwave darkroom, wherein the support rod comprises an avoiding section, the avoiding section is arranged in a manner of inclining or bending towards the first manipulator along a direction from bottom to top, and the rotary table of the piece to be tested is arranged at the top end of the avoiding section.
5. The compact range antenna testing system of claim 1, further comprising a first absorbing baffle disposed between the second manipulator and the mirror.
6. The compact range antenna testing system of claim 4, further comprising a second wave absorbing baffle disposed between the support rod and the reflector.
7. The compact range antenna testing system of claim 1, wherein the anechoic chamber comprises a shielded chamber made of a metallic material and a wave-absorbing material attached to the shielded chamber.
8. The compact range antenna testing system of claim 1, wherein said reflector is made of an aluminum alloy material having an aperture equal to or less than 1.2 meters.
9. The compact range antenna testing system according to claim 1, further comprising a connecting frame disposed between the first manipulator and the reflector, the connecting frame including a fixing plate connected to the first manipulator and a plurality of connecting rods disposed on the fixing plate, wherein an end of the connecting rod remote from the fixing plate is connected to the reflector.
10. A compact range antenna testing system according to claim 1, wherein the feed is a pyramidal horn feed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110343262.8A CN112834833A (en) | 2021-03-30 | 2021-03-30 | Compact range antenna test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110343262.8A CN112834833A (en) | 2021-03-30 | 2021-03-30 | Compact range antenna test system |
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| CN112834833A true CN112834833A (en) | 2021-05-25 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113533864A (en) * | 2021-07-01 | 2021-10-22 | 北京邮电大学 | Three-reflector compact range antenna measurement system, structure and parameter determination method |
| CN113533863A (en) * | 2021-06-23 | 2021-10-22 | 北京邮电大学 | Amplitude scanning system |
| CN113848394A (en) * | 2021-09-23 | 2021-12-28 | 南京捷希科技有限公司 | Compact range air interface test equipment |
| CN114325133A (en) * | 2021-11-26 | 2022-04-12 | 中国电子科技集团公司第三十九研究所 | Microwave darkroom compact range test system |
| CN114566808A (en) * | 2022-03-01 | 2022-05-31 | 北京中测国宇科技有限公司 | Compact-range-based millimeter wave phased array antenna amplitude and phase calibration system and method |
| CN115276836A (en) * | 2022-07-18 | 2022-11-01 | 深圳市通用测试系统有限公司 | Compact range testing system |
| CN116047176A (en) * | 2022-12-05 | 2023-05-02 | 北京信凯达科技有限公司 | Darkroom electromagnetic detection system with automatic avoidance device and detection method thereof |
-
2021
- 2021-03-30 CN CN202110343262.8A patent/CN112834833A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113533863A (en) * | 2021-06-23 | 2021-10-22 | 北京邮电大学 | Amplitude scanning system |
| CN113533863B (en) * | 2021-06-23 | 2022-07-12 | 北京邮电大学 | Amplitude scanning system |
| CN113533864A (en) * | 2021-07-01 | 2021-10-22 | 北京邮电大学 | Three-reflector compact range antenna measurement system, structure and parameter determination method |
| CN113533864B (en) * | 2021-07-01 | 2022-07-29 | 北京邮电大学 | Three-reflector compact range antenna measurement system, structure and parameter determination method |
| CN113848394A (en) * | 2021-09-23 | 2021-12-28 | 南京捷希科技有限公司 | Compact range air interface test equipment |
| CN114325133A (en) * | 2021-11-26 | 2022-04-12 | 中国电子科技集团公司第三十九研究所 | Microwave darkroom compact range test system |
| CN114566808A (en) * | 2022-03-01 | 2022-05-31 | 北京中测国宇科技有限公司 | Compact-range-based millimeter wave phased array antenna amplitude and phase calibration system and method |
| CN114566808B (en) * | 2022-03-01 | 2024-05-28 | 北京中测国宇科技有限公司 | Millimeter wave phased array antenna amplitude and phase calibration system and method based on compact range |
| CN115276836A (en) * | 2022-07-18 | 2022-11-01 | 深圳市通用测试系统有限公司 | Compact range testing system |
| CN116047176A (en) * | 2022-12-05 | 2023-05-02 | 北京信凯达科技有限公司 | Darkroom electromagnetic detection system with automatic avoidance device and detection method thereof |
| CN116047176B (en) * | 2022-12-05 | 2023-12-19 | 北京信凯达科技有限公司 | Darkroom electromagnetic detection system with automatic avoidance device and detection method thereof |
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