CN112162160B - Testing method of Massive MIMO AFU - Google Patents
Testing method of Massive MIMO AFU Download PDFInfo
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- CN112162160B CN112162160B CN202010968308.0A CN202010968308A CN112162160B CN 112162160 B CN112162160 B CN 112162160B CN 202010968308 A CN202010968308 A CN 202010968308A CN 112162160 B CN112162160 B CN 112162160B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention provides a testing method of a Massive MIMO AFU, which comprises the following steps: 1) before the power division network and the calibration network are connected with each other, a signal adapter is arranged at a coupling output port of the filter, an inner guide at one end of the signal adapter is connected with the coupling output port of the filter, an outer guide of the signal adapter is connected with a floor of a calibration network PCB board, 2) the other end of the signal adapter and a radio frequency input port are respectively connected with a vector network analyzer to form a filter test line, the performance of the filter is tested, 3) after the performance test of the filter is finished, the signal adapter is taken down, a feed needle is arranged between the corresponding coupling output port and an antenna input port, 4) the radio frequency input port and an AC (alternating current) port are respectively connected with the vector network analyzer to form an integral performance test line, and the integral performance of the Massive MIMO AFU is tested. The invention has the advantages of simple operation, high test precision and low cost.
Description
Technical Field
The invention relates to the technical field of mobile communication base stations, in particular to a testing method of a Massive MIMO AFU.
Background
The current testing method of the filter in the Massive MIMO AFU generally adopts a method for finding a break between the filter and the antenna to test the coupling output signal. The application number 201920221544.9 discloses an integrated Massive MIMO, a section of broken section is arranged in the output end of a filter and a circuit of a calibration network, two ends of the broken section are respectively provided with a filter performance test point and an antenna performance test point, and after the filter and the antenna performance are respectively tested, a metal sheet is used for connecting the filter and the antenna.
However, the process of setting the broken section to form the test point is very complicated, the filter and the antenna are manually broken, the sectional test method increases the equipment cost and the time cost, the requirement on a test tool is very high, and the test accuracy is not guaranteed.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a testing method of a Massive MIMO AFU, which is simple and convenient to operate, high in testing precision and low in cost.
In order to achieve the above object, the present invention provides a testing method of a passive MIMO AFU, where the passive MIMO AFU includes a reflecting plate, a power division network PCB board disposed on one side of the reflecting plate, and a calibration network PCB board disposed on the other side of the reflecting plate, where the power division network PCB board is provided with a plurality of antenna radiating units and antenna input ports matched with the antenna radiating units, the power division networks on the plurality of antenna radiating units and the power division network PCB board are communicated, the calibration network PCB board is provided with a plurality of filters, and a radio frequency input port and a coupling output port matched with the filters, the plurality of filters are communicated with the calibration network on the calibration network PCB board, a feed pin is disposed between the coupling output port and the antenna input port, the power division network and the calibration network implement electrical signal connection through the feed pin, and the coupling output port is summarized as an AC main port through a power combiner, and the testing method includes the steps of:
1) Before the power division network and the calibration network are connected by the feed pin to realize electric signal connection, a signal adapter is arranged at the coupling output port of the filter, one end of the signal adapter is provided with an outer guide and an inner guide, the inner guide of the signal adapter is connected with the coupling output port of the filter, the outer guide of the signal adapter is lapped with the floor of the PCB of the calibration network,
2) The other end of the signal adapter and the radio frequency input port are respectively connected with a vector network analyzer to form a filter test circuit for testing the performance of the filter,
3) After the performance test of the filter is finished, the signal adapter is taken down, a feed pin is arranged between the corresponding coupling output port and the antenna input port, the power division network and the calibration network realize electric signal connection through the feed pin,
4) And the radio frequency input port and the AC main port are respectively connected with a vector network analyzer to form an overall performance test circuit, and the overall performance of the Massive MIMO AFU is tested.
As a preferable scheme of the invention, the signal adapter is an SMA adapter, a metallized via hole circular ring matched with the inner guide of the SMA adapter is arranged at the coupling output port of the calibration network PCB in the step 1), and the inner guide of the SMA adapter is inserted into the metallized via hole circular ring and is in signal communication with the coupling output port.
Further, the outer guide of the SMA connector comprises four rectangular bosses, the four rectangular bosses are arranged on the periphery of the inner guide of the SMA connector in a square shape, the inner guide of the SMA connector is located in the center of the square shape, four notches matched with the four rectangular bosses are formed in the calibration network PCB, the bottoms of the notches are located on the floor of the calibration network PCB, and the outer guide of the SMA connector is inserted into the notches and communicated with the floor at the bottom of the notches.
Furthermore, the metallized layers Kong Yuanhuan and the notch form a fixed seat, and the SMA connector and the fixed seat are fixed in a binding belt or hand manner in the filter performance testing process.
And further, the step 2) is to connect the other end of the SMA connector and the radio frequency input port with the vector network analyzer respectively to form a filter test line, test the performance of the filter, and connect the AC main port and the antenna input port with the vector network analyzer respectively to form an antenna test line after the performance test of the filter is finished, and test the performance of the antenna radiating unit.
Further, the steps 1) to 4) are performed in a darkroom.
Before the power dividing network and the calibration network are connected with electric signals through the feed pins, an SMA connector is arranged at a coupling output port of the filter, and the SMA connector is connected with a vector network analyzer, so that the performance of the filter is rapidly tested, no tooling assistance is needed, the testing stability and accuracy can be ensured, and the design of a Massive MIMO AFU is greatly simplified. After the performance test of the filter is completed, a feed needle is installed, and the overall performance of the Massive MIMO AFU is tested. The whole testing process is simple, the Massive MIMO AFU is not structurally changed, time and labor are saved, and cost is reduced.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is a structural diagram of a power division network PCB board.
Fig. 3 is a structural diagram of a calibration network PCB board.
Fig. 4 is a partial structural view of the coupling output port.
Fig. 5 is a block diagram of an SMA joint.
Fig. 6 is a longitudinal cross-sectional view of fig. 5.
In the figure: the antenna comprises a 1-antenna radiating unit, a 2-power division network PCB, a 3-reflecting plate, a 4-filter, a 5-calibration network PCB, a 6-radio frequency input port, a 7-feed pin, an 8-coupling output port, a 9-AC main port, a 10-signal adapter, a 10.1-outer conductor, a 10.2-inner conductor, a 11-notch and a 12-metallized via hole ring.
Detailed Description
The following describes the invention in further detail, including preferred embodiments, by way of the accompanying drawings and by way of examples of some alternative embodiments of the invention.
As shown in fig. 1 to 6, a testing method of a Massive MIMO AFU (array antenna of a Massive multiple input and output integrated filter) includes a reflecting plate 3, a power division network PCB board 2 disposed on one side of the reflecting plate 3, and a calibration network PCB board 5 disposed on the other side of the reflecting plate 3, a plurality of antenna radiating units 1 and antenna input ports matched with the antenna radiating units 1 are disposed on the power division network PCB board 2, the plurality of antenna radiating units 1 are communicated with the power division network on the power division network PCB board 2, the calibration network PCB board 5 is provided with a plurality of filters 4, a radio frequency input port 6 matched with the filters 4, and a coupling output port 8, the plurality of filters 4 are communicated with the calibration network on the calibration network PCB board 5, a feed pin 7 is disposed between the coupling output port 8 and the antenna input ports, the power division network and the calibration network realize electrical signal connection through the feed pin 7, and the coupling output port 8 is summarized into an AC main port 9 through a combiner.
As shown in fig. 1, 4, 5 and 6, the test method includes the following steps:
1) Before the power dividing network and the calibration network are connected by means of the feed pin 7 by means of an electrical signal, a signal adapter 10 is arranged at the coupling outlet 8 of the filter 4. As shown in fig. 5 and 6, in this embodiment, the signal adapter adopts an SMA adapter, one end of the SMA adapter is provided with an inner conductor 10.2 and an outer conductor 10.1, a metallized via hole ring 12 matched with the inner conductor 10.2 of the SMA adapter is disposed at the coupling output port 8 of the calibration network PCB board 5, and the inner conductor 10.2 of the SMA adapter is inserted into the metallized via hole ring 12 and is in signal communication with the coupling output port 8. The outer guide 10.1 of the SMA connector comprises four rectangular bosses, the four rectangular bosses are arranged on the periphery of the inner guide 10.2 of the SMA connector in a square shape, the inner guide 10.2 of the SMA connector is located in the center of the square shape, four notches 11 matched with the four rectangular bosses are formed in the calibration network PCB 5, the bottoms of the notches 11 are located on the floor of the calibration network PCB 5, and the outer guide 10.1 of the SMA connector is inserted into the notches 11 and is communicated with the floor at the bottom of the notches 11.
2) The other end of the SMA connector and the radio frequency input port 6 are respectively connected with a vector network analyzer to form a filter 4 test line, the performance of the filter 4 is tested, the metallized via hole ring 12 and the notch 11 form a fixed seat, and the SMA connector and the fixed seat are fixed in a binding belt or hand-held mode in the process of testing the performance of the filter 4. After the performance test of the filter 4 is finished, the AC main port 9 and the antenna input port are respectively connected with a vector network analyzer to form an antenna test line, and the performance of the antenna radiating unit 1 is tested.
3) After the performance test of the filter 4 is finished, the SMA connector is taken down, a feed pin 7 is arranged between the corresponding coupling output port 8 and the antenna input port, the power division network and the calibration network are connected by the feed pin 7 to realize electric signal connection,
4) The radio frequency input port 6 and the AC main port 9 are respectively connected with a vector network analyzer to form an overall performance test circuit, and the overall performance of the Massive MIMO AFU is tested.
The SMA joint adopted in the testing method can provide good standing wave ratio, has small signal reflection, can effectively transmit signals, and increases testing precision.
All the steps are carried out in a darkroom, the darkroom consists of a shielding shell, a shielding door, a ventilation waveguide window, various power filters and the like, the interference of external electromagnetic wave signals to test signals is reduced, meanwhile, the electromagnetic wave absorbing material can reduce the influence of multipath effects caused by reflection of walls and ceilings on test results, and the accuracy of the test method is enhanced.
The test contents of the steps 1) to 4) include, but are not limited to, the amplitude and the phase of the filter, the antenna radiating element and the Massive MIMO AFU.
The test method in the prior art is that a section of broken section is arranged in the output end of the filter 4 and the circuit of the calibration network, a performance test point of the filter 4 is arranged on the circuit of the broken section, which is close to one end of the filter 4, an antenna performance test point is arranged on the circuit of the broken section, which is close to one end of the calibration network, the input end of the filter 4 and the performance test point of the filter 4 are matched to form a performance test circuit of the filter 4, the AC main port 9 and the antenna performance test point are matched to form an antenna performance test circuit, and the AC main port 9 and the input end of the filter 4 are matched to form an integral performance test circuit. When the method is used for testing the performance of the filter 4, the broken section is required to be set manually, the working hours and the material cost are increased, meanwhile, the requirement on a test tool is very high, and the test accuracy is low.
Compared with the prior art, the invention has the advantages that:
1. As shown in fig. 1, a broken section is not required to be set, an SMA connector is arranged at the coupling output port 8 of the filter 4, the inner guide 10.2 of the SMA connector is connected with the coupling output port 8 of the filter 4, the outer guide 10.1 of the SMA connector is lapped with the floor of the calibration network PCB 5, the outer end of the SMA connector and the radio frequency input port 6 are respectively connected with the vector network analyzer to form a filter 4 test line, and the performance of the filter 4 is tested. And the working hours and the cost are saved.
2. The overall performance of the filter 4, the antenna radiating unit 1 and the Massive MIMO AFU can be tested by adopting a vector network analyzer, a special test tool is not needed, and the test accuracy is high.
3. Since the performance of the test filter 4 is before the power division network and the calibration network are connected by the power supply pin 7, the filter 4 can be quickly corrected after the test is completed without disassembling the whole structure.
The above description is only of the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a test method of Massive MIMO AFU, massive MIMO AFU includes reflecting plate (3), locates power division network PCB board (2) of reflecting plate (3) one side and locates calibration network PCB board (5) of reflecting plate (3) opposite side, be equipped with a plurality of antenna radiation unit (1) and the antenna input port that matches with antenna radiation unit (1) on power division network PCB board (2), power division network intercommunication on a plurality of antenna radiation unit (1) and power division network PCB board (2), be equipped with a plurality of filters (4) and radio frequency input port (6) and coupling delivery outlet (8) that match with filters (4) on calibration network PCB board (5), be equipped with feed pin (7) between coupling delivery outlet (8) and the antenna input port, power division network and calibration network realize electrical signal connection through feed pin (7), coupling delivery outlet (8) are AC total mouth (9) through the power combiner, its test method includes following steps:
1) Before the power division network and the calibration network are connected by the feed pin (7), a signal adapter (10) is arranged at a coupling output port (8) of the filter (4), one end of the signal adapter is provided with an outer guide (10.1) and an inner guide (10.2), the inner guide (10.2) of the signal adapter is connected with the coupling output port (8) of the filter (4), the outer guide (10.1) of the signal adapter is lapped with the floor of the calibration network PCB (5),
2) The other end of the signal adapter and the radio frequency input port (6) are respectively connected with a vector network analyzer to form a test line of the filter (4) to test the performance of the filter (4),
3) After the performance test of the filter (4) is finished, the signal adapter is taken down, a feed pin (7) is arranged between the corresponding coupling output port (8) and the antenna input port, the power division network and the calibration network are connected by the feed pin (7) to realize electric signal connection,
4) And the radio frequency input port (6) and the AC main port (9) are respectively connected with a vector network analyzer to form an overall performance test circuit, and the overall performance of the Massive MIMO AFU is tested.
2. The method for testing a Massive MIMO AFU according to claim 1, wherein: the signal adapter (10) is an SMA adapter, a metallized via hole circular ring (12) matched with an inner guide (10.2) of the SMA adapter is arranged at a coupling output port (8) of the calibration network PCB (5) in the step 1), and the inner guide (10.2) of the SMA adapter is inserted into the metallized via hole circular ring (12) and is in signal communication with the coupling output port (8).
3. The method for testing a Massive MIMO AFU according to claim 2, wherein: the outer guide (10.1) of the SMA connector comprises four rectangular bosses, the four rectangular bosses are arranged on the periphery of the inner guide (10.2) of the SMA connector in a square shape, the inner guide (10.2) of the SMA connector is located in the center of the square shape, four notches (11) matched with the four rectangular bosses are formed in the calibration network PCB (5), the bottoms of the notches (11) are located on the floor of the calibration network PCB (5), and the outer guide (10.1) of the SMA connector is inserted into the notches (11) and is communicated with the floor at the bottom of the notches (11).
4. A method for testing a Massive MIMO AFU according to claim 3, wherein: the metallized via hole ring (12) and the notch (11) form a fixed seat, and the SMA connector and the fixed seat are fixed in a binding belt or hand manner in the performance test process of the filter (4).
5. The method for testing a Massive MIMO AFU according to claim 1, wherein: the step 2) is to connect the other end of the signal adapter (10) and the radio frequency input port (6) with the vector network analyzer respectively to form a test circuit of the filter (4), test the performance of the filter (4), and connect the AC main port (9) and the antenna input port with the vector network analyzer respectively to form an antenna test circuit after the performance test of the filter (4) is finished, so as to test the performance of the antenna radiating unit (1).
6. A method for testing a Massive MIMO AFU according to any of claims 1-5, characterized by: the steps 1) to 4) are all carried out in a dark room.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010968308.0A CN112162160B (en) | 2020-09-15 | 2020-09-15 | Testing method of Massive MIMO AFU |
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| CN202010968308.0A CN112162160B (en) | 2020-09-15 | 2020-09-15 | Testing method of Massive MIMO AFU |
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| CN112162160B true CN112162160B (en) | 2024-05-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115732921A (en) * | 2021-08-30 | 2023-03-03 | 武汉凡谷电子技术股份有限公司 | AFU antenna and test method thereof |
| CN116500397B (en) * | 2023-02-24 | 2025-12-19 | 河北北芯半导体科技有限公司 | Capacitor parameter testing capability verification article and preparation method thereof |
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