CN106443210B - System and method for testing three-dimensional space radiation field phase of active base station antenna - Google Patents
System and method for testing three-dimensional space radiation field phase of active base station antenna Download PDFInfo
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- CN106443210B CN106443210B CN201611097633.4A CN201611097633A CN106443210B CN 106443210 B CN106443210 B CN 106443210B CN 201611097633 A CN201611097633 A CN 201611097633A CN 106443210 B CN106443210 B CN 106443210B
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- 230000005855 radiation Effects 0.000 title claims abstract description 58
- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000000523 sample Substances 0.000 claims abstract description 57
- 239000011159 matrix material Substances 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 8
- 230000010287 polarization Effects 0.000 claims description 17
- 238000003491 array Methods 0.000 claims 1
- 230000009977 dual effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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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
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a testing system and a method for the three-dimensional space radiation field phase of an active base station antenna, which aim to solve the defect that ERP and EIS data obtained in the existing near field measurement only contain amplitude values but not phase values, and the far-field ERP and EIS data cannot be calculated, and the technical scheme is characterized in that: a testing system for the three-dimensional space radiation field phase of an active base station antenna comprises a signal source, a multi-probe array device, a switch matrix and a signal analyzer, wherein the signal source is electrically connected with a plurality of radiation units of the active base station antenna and used for providing multipath adjustable radio frequency signals, the multi-probe array device is distributed annularly around the active base station antenna and can form a spherical detection surface, the switch matrix is electrically connected with the multi-probe array device and used for switching a plurality of probes, and the signal analyzer is electrically connected with the switch matrix and used for receiving and processing test data of the multi-probe array device and generating radiation amplitude and phase data. The test system of the invention has the advantage of being able to measure and derive phase information in the near field.
Description
Technical Field
The invention relates to the technical field of antenna measurement, in particular to a system and a method for testing the amplitude and the phase of an antenna radiation field of an active base station.
Background
With the current clear 5G communication form, the application of the base station antenna enters an activation stage, that is, the base station antenna and the base station system are gradually unified to form an active base station antenna, and actually the active base station antenna can be understood as a communication system rather than a simple antenna, and the conventional passive test field cannot meet the spatial radiation characteristic test of the active base station antenna. It is desirable to use ERP, EIS, a parameter describing the radiation performance of the active base station antenna, and to draw the radiation pattern of the active base station antenna by ERP, EIS in each direction of space, however ERP, EIS is based on the modulated signal, and can be understood as amplitude information only and not phase information. It is known that in near field measurement, we obtain the electric field amplitude and phase at enough points on the near field, so that the far field pattern of the antenna to be measured can be calculated, and the amplitude and phase cannot be obtained. ERP and EIS read in near field measurement are only near field results, and phase information is needed to obtain far field description.
Disclosure of Invention
Aiming at the defects existing in the prior art, the first aim of the invention is to provide a testing system for the three-dimensional space radiation field phase of an active base station antenna, which has the advantage of measuring and obtaining the phase information in the near field.
The technical aim of the invention is realized by the following technical scheme: a testing system for the three-dimensional space radiation field phase of an active base station antenna comprises a signal source, a multi-probe array device, a switch matrix and a signal analyzer, wherein the signal source is electrically connected with a plurality of radiation units of the active base station antenna and used for providing multipath adjustable radio frequency signals, the multi-probe array device is distributed annularly around the active base station antenna and can form a spherical detection surface, the switch matrix is electrically connected with the multi-probe array device and used for switching a plurality of probes, and the signal analyzer is electrically connected with the switch matrix and used for receiving and processing test data of the multi-probe array device and generating radiation amplitude and phase data.
By adopting the technical scheme, the active base station antenna is used as an object to be tested for radiation characteristics, and is provided with a plurality of radiation units, so that multiple paths of controllable signals can be fed into a three-dimensional space; during testing, a signal source is controlled to feed multi-path controllable signals into an active base station antenna, a plurality of radiation units of the active base station antenna feed the multi-path controllable signals into a three-dimensional space, then a plurality of probes in a multi-probe array device are switched by using a switch matrix to obtain test data of the whole spherical detection surface, and then the test data are processed by using a signal analyzer to obtain near-field radiation amplitude and phase data of the whole spherical surface.
The invention is further provided with: the multi-probe array device comprises a mounting ring, a plurality of probes arranged on the mounting ring, a bearing table rotatably connected to the turntable base and used for placing an active base station antenna, and a driving device used for driving the bearing table to rotate so as to form a detection spherical surface, wherein the active base station antenna is arranged at the center of the mounting ring.
Through adopting above-mentioned technical scheme, active basic station antenna is located the central point of many probes, and a plurality of probes can carry out equidistant test to active basic station antenna, and through drive arrangement drive plummer rotation, can switch to next tangent plane and carry out data detection after detecting the data of one tangent plane of active basic station antenna again, finally obtain the radiation amplitude and the phase place data of whole spherical field.
The invention is further provided with: the driving device comprises a driving motor, a driving gear fixed on the rotating shaft of the driving motor, and a driven gear fixed on the bearing table and meshed with the driving gear.
By adopting the technical scheme, the driving motor is started, and drives the driving gear to rotate, so that the driven gear is driven to rotate, and the bearing table is rotated to drive the active base station antenna to rotate relatively relative to the mounting ring to form the detection spherical surface.
The invention is further provided with: the probe is a vertically crossed dual-polarized probe.
By adopting the technical scheme, the dual-polarized probe has two polarization states of H polarization and V polarization, so that two groups of data can be detected under the two polarization states respectively.
The invention is further provided with: the driving motor adopts a servo motor.
By adopting the technical scheme, the controllability of the servo motor is higher, and the rotating angle of the bearing table is more conveniently controlled.
The second object of the present invention is to provide a method for testing the phase of a radiation field in three-dimensional space of an active base station antenna, which has the advantage of measuring the phase information in the near field.
The technical aim of the invention is realized by the following technical scheme: a method for testing the phase of three-dimensional space radiation field of active base station antenna includes
A step of controlling a signal source to feed a plurality of controllable signals to an active base station antenna so that a plurality of radiation units feed the plurality of controllable signals to a three-dimensional space;
a step of switching a plurality of probes and polarization by a switch matrix, obtaining test data of each probe and sending the test data to the signal analyzer for processing so as to obtain radiation amplitude and phase data of an active base station antenna in a section;
and rotating the bearing table to test the radiation amplitude and phase data in the other section of the active base station antenna, thereby obtaining the whole spherical near-field radiation amplitude and phase data.
By adopting the technical scheme, the radiation amplitude and phase data in one section of the active base station antenna are firstly obtained, then the radiation amplitude and phase data in a plurality of sections are sequentially obtained, finally the whole spherical near-field radiation amplitude and phase data are obtained, and the far-field ERP and EIS data can be calculated through the obtained near-field ERP and EIS data and the detected radiation amplitude and phase data, so that the overall performance of the active base station antenna can be better described.
In summary, the invention has the following beneficial effects:
firstly, through a multi-probe array device, a switch matrix and a signal analyzer, radiation amplitude and phase data of the whole spherical near field of an active base station antenna can be detected;
secondly, the servo motor drives the bearing table to rotate to form a detection spherical surface, so that the controllability is good and the detection precision is high;
thirdly, the probe is a vertically crossed dual-polarized probe, and two groups of data can be detected in two polarization states respectively.
Drawings
Fig. 1 is a schematic diagram of a signal source feeding multiple signals to an active base station according to a first embodiment;
FIG. 2 is a schematic diagram of the structure of the first embodiment;
fig. 3 is a flowchart of a second embodiment.
In the figure: 1. an active base station antenna; 11. a radiation unit; 2. a signal source; 31. a mounting ring; 32. a probe; 33. a carrying platform; 341. a driving motor; 342. a drive gear; 343. a driven gear; 4. a switch matrix; 5. a signal analyzer; 6. a radio frequency cable.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Embodiment one: as shown in FIG. 1, the active base station antenna 1 is provided with a plurality of radiating units 11, the radiating units 11 are connected with a signal source 2 through a radio frequency cable 6, and the signal source 2 provides multipath adjustable radio frequency signals for the radiating units 11;
as shown in fig. 2, a multi-probe array device is arranged outside the active base station antenna 1, and the multi-probe array device comprises a mounting ring 31, a plurality of probes 32, a bearing table 33 and a driving device; the probes 32 are fixed on the mounting ring 31 through radio frequency interfaces and are uniformly distributed around the axis direction of the mounting ring 31, the active base station antenna 1 is arranged at the center of the mounting ring 31, and the probes 32 adopt vertically crossed dual-polarized probes 32 which have two polarization states of H polarization and V polarization, so that two groups of data can be detected under the two polarization states respectively; the bearing table 33 is rotationally connected to the turntable base, a holding column is fixed on the lower surface of the bearing table 33 at the center position of the mounting ring 31, the active base station antenna 1 is placed on the bearing table 33, the bearing table 33 can drive the active base station antenna 1 to rotate when rotating, a darkroom is usually arranged outside the test system, and the turntable base is provided with the bottom of the darkroom;
as shown in fig. 2, the driving device includes a driving motor 341, a driving gear 342 and a driven gear 343, the driving motor 341 is fixed in the active base station by a bolt, the driving motor 341 adopts a servo motor, the control is more convenient and the control precision is higher, the driving gear 342 is sleeved on the rotating shaft of the driving motor 341, and the driven gear 343 is sleeved on the holding column and meshed with the driving gear, so that the driving motor 341 is started to drive the bearing table 33 to rotate.
As shown in fig. 2, the multi-probe array device is electrically connected to a switch matrix 4 through a cable, and the switch matrix 4 is used for switching the plurality of probes 32 and polarization in the multi-probe array device, so that each probe 32 detects a set of data in an H-polarization state and a V-polarization state; the switch matrix 4 is electrically connected to the signal analyzer 5 through a cable, the signal analyzer 5 receives test data detected by the plurality of probes 32, performs operation and processing to obtain amplitude and phase data of near-field radiation, and typically, the signal analyzer 5 adopts a network analyzer.
During testing, the control signal source 2 feeds multi-path controllable signals into the active base station antenna 1, so that a plurality of radiation units 11 of the active base station antenna 1 feed the multi-path controllable signals into a three-dimensional space, then a switch matrix 4 is used for switching a plurality of probes 32 and polarization in a multi-probe array device to obtain data in one section of the active base station antenna 1, then a driving motor 341 is started to drive a bearing table 33 to rotate, and then the active base station antenna 1 is driven to rotate to another section, the rotation angle can be determined according to the data amount required by the tested active base station antenna 1, the plurality of probes 32 and polarization are switched again through the switch matrix 4 to obtain the data in the section, and the like, until the mounting ring 31 rotates to form a complete detection sphere, and then data detection is completed; the data detected by each probe 32 are sent to the signal analyzer 5, which computes and processes the data to obtain the amplitude and phase data of the near-field radiation.
Embodiment two: a method for testing the phase of the three-dimensional space radiation field of an active base station antenna is shown in fig. 3, and comprises the following steps: the control signal source 2 feeds a plurality of controllable signals into the active base station antenna 1, and after the active base station antenna 1 receives the signals, the plurality of radiation units 11 respond to the signals and send the controllable signals to the three-dimensional space;
step two: switching the plurality of probes 32 and the polarization through the switch matrix 4, sequentially enabling the H polarization and the V polarization of each probe 32 to detect one group and send the detected group to the signal analyzer 5, and calculating and processing by the signal analyzer 5 to obtain radiation amplitude and phase data in one section of the active base station antenna 1;
step three: controlling a driving motor 341 to drive a bearing table 33 to rotate, so that the active base station antenna 1 rotates to another section, testing radiation phase data in the section and sending the radiation phase data to a signal analyzer 5, calculating and processing by the signal analyzer 5 to obtain radiation amplitude and phase data in the section of the active base station antenna 1, transmitting the data detected by a probe 32 to the signal analyzer 5 in a complex form, and calculating amplitude and phase values according to the values of real parts and imaginary parts of the complex number; data as measured by probe 32 is sent to the signal analyzer in the form of a+biThe amplitude value can be obtained through calculationPhase valueStep four: the test procedure of the third step is repeated until the mounting ring 31 forms a finished detection sphere relative to the active base station antenna 1, thereby obtaining near-field radiation amplitude and phase data of the whole sphere, namely obtaining near-field ERP and EIS data and detected radiation amplitude and phase data, and calculating far-field ERP and EIS data through the radiation amplitude and phase data.
Firstly, radiation phase data in one section of the active base station antenna 1 are obtained, then radiation amplitude and phase data in a plurality of sections are sequentially obtained, finally, near-field radiation amplitude and phase data of the whole spherical surface are obtained, near-field ERP and EIS data are obtained through an existing test mode, and then the detected radiation amplitude and phase data are combined, so that the far-field ERP and EIS data can be calculated, and the overall performance of the active base station antenna 1 can be better described.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (5)
1. A testing system for the three-dimensional space radiation field phase of an active base station antenna is characterized in that: the system comprises a signal source (2) which is electrically connected with a plurality of radiating units (11) of an active base station antenna (1) and is used for providing multipath adjustable radio frequency signals, a multi-probe array device which is distributed annularly around the active base station antenna (1) and can form a spherical detection surface, a switch matrix (4) which is electrically connected with the multi-probe array device and is used for switching a plurality of probes (32), and a signal analyzer (5) which is electrically connected with the switch matrix (4) and is used for receiving and processing test data of the multi-probe array device and generating radiation amplitude and phase data;
the multi-probe (32) array device comprises a mounting ring (31), a plurality of probes (32) arranged on the mounting ring (31), a bearing table (33) rotatably connected to a turntable base and used for placing an active base station antenna (1), and a driving device used for driving the bearing table (33) to rotate so as to form a detection sphere, wherein the active base station antenna (1) is arranged at the center of the mounting ring (31);
the system control signal source (2) feeds multi-path controllable signals to the active base station antenna (1), so that a radiation unit (11) of the active base station antenna (1) feeds the multi-path controllable signals to a three-dimensional space, and then a switch matrix (4) is utilized to switch a plurality of probes (32) and arrays in the multi-probe array device, so that data in one section of the active base station antenna (1) is obtained; then the driving device drives the bearing table (33) to rotate, and data in another tangent plane are obtained again until complete detection spherical surface data are obtained; the data measured by the probe (32) are sent to the signal analyzer (5) in the form of a+bi according to，And calculating to obtain an amplitude value A and a phase value P.
2. The system for testing the three-dimensional space radiation field phase of an active base station antenna according to claim 1, wherein: the driving device comprises a driving motor (341), a driving gear (342) fixed on the rotating shaft of the driving motor (341), and a driven gear (343) fixed on the bearing table (33) and meshed with the driving gear (342).
3. The system for testing the three-dimensional space radiation field phase of an active base station antenna according to claim 1, wherein: the probe (32) is a vertically crossed dual polarized probe (32).
4. The system for testing the three-dimensional space radiation field phase of an active base station antenna according to claim 2, wherein: the driving motor (341) adopts a servo motor.
5. A method for testing the three-dimensional space radiation field phase of an active base station antenna, which is applied to the testing system of the three-dimensional space radiation field phase of the active base station antenna according to any one of claims 1 to 4, and is characterized in that: comprising
A step of feeding a plurality of controllable signals to the active base station antenna (1) by the control signal source (2) so that the plurality of radiating elements (11) feed the plurality of controllable signals to the three-dimensional space;
a step of switching a plurality of probes (32) and polarization by a switch matrix (4), obtaining test data of each probe (32) and sending the test data to a signal analyzer (5) for processing so as to obtain radiation amplitude and phase data of an active base station antenna (1) in a tangent plane; and rotating the bearing table (33) to test the radiation amplitude and phase data in the other section of the active base station antenna (1) so as to obtain the whole spherical near-field radiation amplitude and phase data.
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| CN201611097633.4A CN106443210B (en) | 2016-12-03 | 2016-12-03 | System and method for testing three-dimensional space radiation field phase of active base station antenna |
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| CN108414990A (en) * | 2018-02-27 | 2018-08-17 | 北京环境特性研究所 | A kind of target scattering characteristics measuring system and method |
| CN109725275B (en) * | 2018-12-26 | 2022-08-30 | 刘科宏 | Probe calibration method based on near-field multi-probe antenna measurement system |
| CN111025033B (en) * | 2020-01-02 | 2021-12-10 | 北京建筑大学 | Radiation pattern measuring method and system for internal antenna of wireless smoke sensor |
| CN116420082A (en) * | 2020-10-22 | 2023-07-11 | 是德科技股份有限公司 | System and method for performing measurements on a measured antenna offset from the center of the dead zone |
| CN112711040B (en) * | 2020-12-18 | 2024-06-21 | 中国信息通信研究院 | Satellite navigation antenna performance evaluation system and method |
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Effective date of registration: 20240122 Address after: 518000 unit 2, floor 2, No.5, Hualian Industrial Zone, Xinshi community, Dalang street, Longhua District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN XINYI TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 571126 No. 6, Tanxiang village, Lingshan Town, Meilan District, Haikou City, Hainan Province Patentee before: Liu Kehong Country or region before: China |