CN110545144A - Passive intermodulation test system of multiband multiaerial - Google Patents
Passive intermodulation test system of multiband multiaerial Download PDFInfo
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- CN110545144A CN110545144A CN201910781876.7A CN201910781876A CN110545144A CN 110545144 A CN110545144 A CN 110545144A CN 201910781876 A CN201910781876 A CN 201910781876A CN 110545144 A CN110545144 A CN 110545144A
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- 101000796932 Homo sapiens ADP/ATP translocase 1 Proteins 0.000 description 4
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
- H04B17/0085—Monitoring; Testing using service channels; using auxiliary channels using test signal generators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
Abstract
The invention discloses a passive intermodulation test system of a multi-band multi-antenna, which comprises a controller, an intermodulation tester and a single-pole multi-throw switch which are connected in sequence, wherein a plurality of output ends of the single-pole multi-throw switch are respectively connected with a plurality of antennas to be tested; or comprises a controller, more than two intermodulation testers, more than two first single-pole multi-throw switches and a plurality of second single-pole multi-throw switches; the controller is respectively connected with the more than two intermodulation testers; the two or more intermodulation testers are respectively connected with the input ends of the two or more first single-pole multi-throw switches in a one-to-one correspondence manner; a plurality of output ends of each first single-pole multi-throw switch are respectively connected with one input end of a plurality of second single-pole multi-throw switches; and the output ends of the second single-pole multi-throw switches are respectively connected with the tested antennas. The invention can improve the intermodulation test efficiency of a plurality of antennas with multiple frequency bands.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a passive intermodulation test system of a multi-band multi-antenna.
background
along with the commercialization of 5G, many base station products will simultaneously include LTE frequency bands and 5G frequency bands in order to ensure the smooth transition from 4G to 5G, so that one base station antenna product will include a large number of antenna units. Passive intermodulation is a relatively important test parameter for base station antenna products, and if passive intermodulation (especially 3-order intermodulation) is in problem, the receiving of antenna signals can be seriously interfered, so that the performance of the antenna is reduced, and therefore, the intermodulation test of the antenna is a necessary test for ensuring the reliability of the performance of the antenna for production. Based on the above situation, the passive intermodulation test of the multiband multi-antenna has the problem that the number of intermodulation test instruments which are required and have long test time is increased due to the fact that frequency bands are multiple and antennas are multiple.
The existing intermodulation test system is basically that an antenna of one frequency band corresponds to one intermodulation tester, and for the case that one antenna comprises a plurality of frequency bands, one antenna product corresponds to a plurality of intermodulation testers, and different operators finish the test by dividing the test into several times.
For a test system which is placed with an antenna product for testing at one time and needs to test a multi-band antenna for multiple times at present, the time for placing the product on a test fixture is too long, the test period of a single product is long, and multiple operators are needed for completing intermodulation tests of all required frequency bands by one antenna product, so that the whole test cost is too high.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the passive intermodulation test system of the multi-band multi-antenna is provided, and the intermodulation test efficiency of the multi-band multi-antenna can be improved.
In order to solve the technical problems, the invention adopts the technical scheme that: a passive intermodulation test system of a multiband multi-antenna comprises a controller, an intermodulation tester and a single-pole multi-throw switch which are sequentially connected, wherein a plurality of output ends of the single-pole multi-throw switch are respectively connected with a plurality of antennas to be tested.
The invention also provides a passive intermodulation test system of the multiband multi-antenna, which comprises a controller, more than two intermodulation test instruments, more than two first single-pole multi-throw switches and a plurality of second single-pole multi-throw switches, wherein the controller is connected with the first single-pole multi-throw switches; the first single-pole multi-throw switch comprises one input end and a plurality of output ends, and the second single-pole multi-throw switch comprises more than two input ends and one output end; the number of the intermodulation testers, the number of the first single-pole multi-throw switches and the number of the input ends of the second single-pole multi-throw switches are consistent; the number of the output ends of the first single-pole multi-throw switches and the number of the second single-pole multi-throw switches are consistent with the number of the antennas to be tested;
The controller is respectively connected with the more than two intermodulation testers; the more than two intermodulation testers are respectively connected with the input ends of the more than two first single-pole multi-throw switches in a one-to-one correspondence manner; a plurality of output ends of each first single-pole multi-throw switch are respectively connected with one input end of each second single-pole multi-throw switch; and the output ends of the second single-pole multi-throw switches are respectively connected with the tested antennas.
The invention has the beneficial effects that: by integrating the tests of a plurality of frequency bands in one system, one intermodulation tester can be used for testing a plurality of antenna products containing the same test frequency band in one test, so that the utilization rate of the intermodulation tester is improved; the antennas are placed at the same time for testing, the testing can be completed by taking and placing the antennas once, the taking and placing time of the antennas to be tested is saved, and the equipment cost and the testing cost are both obviously reduced.
Drawings
Fig. 1 is a schematic structural diagram of a passive intermodulation test system of a multiband multi-antenna according to a first embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a passive intermodulation test system of a multiband multi-antenna according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a back side of a test circuit board according to a second embodiment of the present invention;
fig. 4 is a schematic front view of a test circuit board according to a second embodiment of the invention.
Description of reference numerals:
1. A controller; 2. an intermodulation tester; 3. a single-pole, multi-throw switch; 4. a first single pole, multiple throw switch; 5. a second single pole, multiple throw switch; 6. testing the circuit board; 7. a measured antenna; 8. a multi-port transponder;
61. Connecting a cable; 62. and (4) a thimble.
Detailed Description
In order to explain technical contents, objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
The most key concept of the invention is as follows: and simultaneously placing a plurality of antennas with different frequency bands or the same frequency band on a fixture for testing.
Referring to fig. 1, a passive intermodulation test system of a multiband multi-antenna includes a controller, an intermodulation tester and a single-pole multi-throw switch connected in sequence, wherein a plurality of output terminals of the single-pole multi-throw switch are respectively connected with a plurality of antennas to be tested.
Furthermore, the single-pole multi-throw switch also comprises a connecting piece, and a plurality of output ends of the single-pole multi-throw switch are respectively connected with a plurality of antennas to be tested through the connecting piece.
The invention also provides a passive intermodulation test system of the multiband multi-antenna, which comprises a controller, more than two intermodulation test instruments, more than two first single-pole multi-throw switches and a plurality of second single-pole multi-throw switches, wherein the controller is connected with the first single-pole multi-throw switches; the first single-pole multi-throw switch comprises one input end and a plurality of output ends, and the second single-pole multi-throw switch comprises more than two input ends and one output end; the number of the intermodulation testers, the number of the first single-pole multi-throw switches and the number of the input ends of the second single-pole multi-throw switches are consistent; the number of the output ends of the first single-pole multi-throw switches and the number of the second single-pole multi-throw switches are consistent with the number of the antennas to be tested;
The controller is respectively connected with the more than two intermodulation testers; the more than two intermodulation testers are respectively connected with the input ends of the more than two first single-pole multi-throw switches in a one-to-one correspondence manner; a plurality of output ends of each first single-pole multi-throw switch are respectively connected with one input end of each second single-pole multi-throw switch; and the output ends of the second single-pole multi-throw switches are respectively connected with the tested antennas.
The output ends of the second single-pole multi-throw switches are connected with the tested antennas through the connecting pieces respectively.
It can be known from the above description that the intermodulation test efficiency of multiple antennas including multiple frequency bands of the same base station product can be improved, the average test time of a single-antenna product is shortened, the utilization rate of the intermodulation tester is improved, and one intermodulation tester can be used for testing several antenna products including the same test frequency band in one test, thereby achieving the purpose of reducing the production cost.
Furthermore, the device also comprises a multi-port repeater, and the controller is respectively connected with the more than two intermodulation testers through the multi-port repeater.
Furthermore, the connecting piece comprises a test circuit board, a plurality of connecting cables and a plurality of thimbles are arranged on the test circuit board, and the number of the connecting cables and the number of the thimbles are consistent with the number of the antennas to be tested; the plurality of connecting cables are respectively connected with the plurality of thimbles in a one-to-one correspondence manner, and the plurality of thimbles are respectively connected with the plurality of antennas to be tested in a one-to-one correspondence manner.
As can be seen from the above description, it is ensured that the test signal can be transmitted to the antenna under test.
Further, the antenna clamp is further included, and the plurality of antennas to be tested are arranged on the test circuit board through the antenna clamp.
According to the above description, the time for taking and placing the antenna to be measured is saved by placing a plurality of antennas to be measured on the same antenna fixture.
Further, the intermodulation tester comprises a signal generator and a power amplifier, wherein the signal generator is connected with the power amplifier.
Example one
Referring to fig. 1, a first embodiment of the present invention is: the passive intermodulation test system comprises a controller 1, an intermodulation tester 2 and a single-pole multi-throw switch 3 which are sequentially connected, wherein the single-pole multi-throw switch 3 comprises an input end and a plurality of output ends, the number of the output ends is consistent with that of the tested antennas 7, and the plurality of output ends of the single-pole multi-throw switch 3 are respectively connected with the plurality of tested antennas 7 (four output ends and four tested antennas are taken as examples in figure 1).
Furthermore, the single-pole multi-throw switch also comprises a connecting piece, and a plurality of output ends of the single-pole multi-throw switch are respectively connected with a plurality of antennas to be tested through the connecting piece.
In this embodiment, the connecting piece is a test circuit board provided with a plurality of connecting cables and a plurality of thimbles, the plurality of output ends of the single-pole multi-throw switch are respectively connected with the plurality of connecting cables in a one-to-one correspondence manner, the plurality of connecting cables are respectively connected with the plurality of thimbles in a one-to-one correspondence manner, and the plurality of thimbles are respectively connected with the plurality of antennas to be tested in a one-to-one correspondence manner.
Further, an antenna holder (not shown) is included, and the plurality of antennas 7 to be tested are disposed on the test circuit board 6 through the antenna holder.
in this embodiment, the intermodulation tester has integrated a signal generator and a power amplifier, and integrates a plurality of frequency band test modules, for example, four test modules of 900MHz frequency band, 2100MHz frequency band, 2600MHz frequency band, and 3500MHz frequency band.
in the embodiment, the plurality of antennas are placed on one antenna clamp for testing, so that the time for taking and placing the tested antennas is saved; by integrating the tests of a plurality of frequency bands in one system, one intermodulation tester can be used for testing a plurality of antenna products containing the same test frequency band in one test, so that the utilization rate of the intermodulation tester is improved, and the starting time of the intermodulation tester is saved; compared with a test system which only tests one antenna at a time, the average test time of a single antenna is shortened, and the equipment cost and the test cost are reduced.
Example two
Referring to fig. 2-4, the second embodiment of the present invention is: a passive intermodulation test system of a multiband multi-antenna comprises a controller 1, more than two intermodulation test instruments 2, more than two first single-pole multi-throw switches 4 and a plurality of second single-pole multi-throw switches 5; the first single-pole multi-throw switch 4 comprises one input end and a plurality of output ends, and the second single-pole multi-throw switch 5 comprises more than two input ends and one output end; the number of the intermodulation testers 2, the number of the first single-pole multi-throw switches 4 and the number of the input ends of the second single-pole multi-throw switches 5 are consistent; the number of the output ends of the first single-pole multi-throw switch 4 and the number of the second single-pole multi-throw switches 5 are consistent with the number of the tested antennas 7.
In this embodiment and fig. 2, two intermodulation testers, two first single-pole multi-throw switches, four second single-pole multi-throw switches, and four tested antennas are taken as an example for explanation, then the first single-pole multi-throw switch is a single-pole four-throw switch, and the second single-pole multi-throw switch is a single-pole double-throw switch.
The controller 1 is respectively connected with the two intermodulation testers 2, and further connected with the two intermodulation testers 2 through a multiport repeater (HUB) 8; the two intermodulation testers 2 are respectively connected with the two single-pole four-throw switches in a one-to-one correspondence manner, four output ends of the single-pole four-throw switches are respectively connected with one input end of four single-pole two-throw switches, each input end of the four single-pole two-throw switches is respectively connected with one output end of one single-pole four-throw switch, the output ends of the four single-pole two-throw switches are respectively connected with the four tested antennas 7 in a one-to-one correspondence manner, and further, the output ends of the four single-pole two-throw switches are respectively connected with the four tested antennas in a one-to-one correspondence manner through.
In this embodiment, the test circuit board 6 of connecting piece for being equipped with connecting cable and thimble, the quantity of connecting cable and the quantity of thimble are unanimous with the quantity of antenna under test, are equipped with four connecting cable promptly, four connecting cable's one end is connected with four single-pole double-throw switch's output one-to-one respectively, four connecting cable's the other end has welded four thimbles respectively, and four connecting cable are connected with four thimble one-to-ones respectively, and four thimbles are connected with four antenna under test 7 one-to-ones respectively.
As shown in fig. 3 to 4, fig. 3 is a schematic view of the back surface of the test circuit board, and fig. 4 is a schematic view of the front surface of the test circuit board, in which the shaded portion is a copper-clad area, four connection cables 61 are soldered to the back surface of the test circuit board 6, and four pins 62 are soldered to the front surface of the test circuit board 6 (the front surface and the back surface of the test circuit board are connected by via holes). Through setting up connecting cable and thimble, realize test signal from single-pole double-throw to the transmission of antenna under test.
further, an antenna fixture (not shown in the figure) is also included, and the antenna fixture can be used for placing a plurality of antennas to be tested at one time. In this embodiment, four antennas to be tested are arranged on the test circuit board through the antenna fixture, that is, the four antennas to be tested are arranged on the antenna fixture, the antenna fixture provided with the four antennas to be tested is arranged on the test circuit board during testing, and the antennas to be tested are contacted with the thimble. The test of the four tested antennas can be completed in the process of taking and placing the antenna clamp at one time.
The controller may be a test terminal (e.g., a computer) including test software for sending a signal for initiating the intermodulation test and selecting a test frequency band. The intermodulation tester and the single-pole four-throw switch, the single-pole four-throw switch and the single-pole double-throw switch, and the single-pole double-throw switch are connected with the test circuit board through the low intermodulation cable and the joint, frequency signals sent by the intermodulation tester are transmitted to the test circuit board through the single-pole four-throw switch and the single-pole double-throw switch, and then the frequency signals are output to the tested antenna which is placed on the test circuit board through the antenna clamp through the connecting cable on the test circuit board and the thimble which is in contact with the tested antenna, so that the transmission of the signals is realized.
In this embodiment, a single intermodulation tester has integrated a signal generator and a power amplifier, and integrates two frequency band test modules, for example, one intermodulation tester integrates two test modules in the 900MHz frequency band and the 2100MHz frequency band, and the other intermodulation tester integrates two test modules in the 2600MHz frequency band and the 3500MHz frequency band. Further, in the testing process, the tested antenna of the corresponding frequency band can be selected for testing according to the frequency band of the testing module integrated by the intermodulation tester in the testing system.
Further, an antenna tag can be arranged on the antenna to be tested, and the antenna tag is provided with a unique identifier of the antenna to be tested, such as a two-dimensional code.
The positions of the four antennas to be measured on the antenna fixture are uniquely fixed according to the frequency bands, for example, ANT1 is at the upper left corner, ANT2 is at the upper right corner, ANT3 is at the lower left corner, and ANT4 is at the lower right corner of the antenna fixture. The test software has preset the ports of the SPDT (single pole double throw switch), SP4T (single pole four throw switch) and the intermodulation tester corresponding to the tested antenna at a fixed position on the antenna fixture, so as to control the switch to be closed during testing and ensure that correct signals are transmitted to the corresponding antenna. Before testing, the four-antenna two-dimensional code entry testing system is sequentially scanned according to a preset sequence of testing software, for example, the ANT1, the ANT2, the ANT3 and the ANT4 are scanned for the first time. The testing software is started by one key and then sequentially completes the testing from the ANT1 to the ANT4, the first testing data to the fourth testing data correspond to the ANT1 to the ANT4 respectively, the testing software automatically corresponds to the testing data to the two-dimensional code scanned into the system and automatically records the testing data in the background, and meanwhile, a window of the testing software displays the testing result so as to inform an operator to process the antenna to be tested according to the testing result.
The invention can place different antennas containing a plurality of different frequency bands on a clamp for testing, also can place a plurality of antennas of the same frequency band on a clamp for testing, the clamp for placing the antenna can prepare a plurality of sets, when one set of clamp for placing the antenna is used for testing, the other set of clamp can be provided with the antenna, compared with a testing system for testing only one antenna at a time, the average testing time of a single antenna is greatly shortened; meanwhile, tests of a plurality of frequency bands are integrated in one system, so that the utilization rate of an intermodulation tester is improved, for example, a base station comprises two antennas, an antenna 1 comprises frequency bands of 900MHz and 1800MHz, and an antenna 2 comprises 1800MHz and 2100MHz, four intermodulation testers are required in the traditional test mode (the antenna 1 needs one intermodulation tester of 900MHz and 1800MHz, and the antenna 2 needs 1 intermodulation tester of 1800MHz and 2100 MHz), each antenna is tested twice, and the test is totally performed four times; by adopting the test system of the invention, the antenna 1 and the antenna 2 can be simultaneously placed in one test system to finish the test at one time, so that 1800MHz intermodulation instrument modules can be shared, the number of the intermodulation instrument test modules is reduced to 3 sets, meanwhile, two antennas are placed on one set of clamp, the test can be finished by taking and placing at one time, and the equipment cost and the test cost are both obviously reduced.
in summary, the passive intermodulation test system of multiple bands and multiple antennas provided by the invention can improve the intermodulation test efficiency of multiple antennas containing multiple bands of the same base station product, reduce the average test time of a single antenna product, and simultaneously improve the utilization rate of the intermodulation test instrument, and one intermodulation test instrument can be used for testing multiple antenna products containing the same test frequency band in one test, thereby achieving the purpose of reducing the production cost.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (8)
1. The passive intermodulation test system of the multiband multi-antenna is characterized by comprising a controller, an intermodulation tester and a single-pole multi-throw switch which are sequentially connected, wherein a plurality of output ends of the single-pole multi-throw switch are respectively connected with a plurality of antennas to be tested.
2. The passive intermodulation test system of the multiband multiple antenna of claim 1, further comprising a connection member through which the plurality of output terminals of the single-pole multiple-throw switch are connected to the plurality of antennas under test, respectively.
3. A passive intermodulation test system of a multiband multi-antenna is characterized by comprising a controller, more than two intermodulation test instruments, more than two first single-pole multi-throw switches and a plurality of second single-pole multi-throw switches; the first single-pole multi-throw switch comprises one input end and a plurality of output ends, and the second single-pole multi-throw switch comprises more than two input ends and one output end; the number of the intermodulation testers, the number of the first single-pole multi-throw switches and the number of the input ends of the second single-pole multi-throw switches are consistent; the number of the output ends of the first single-pole multi-throw switches and the number of the second single-pole multi-throw switches are consistent with the number of the antennas to be tested;
The controller is respectively connected with the more than two intermodulation testers; the more than two intermodulation testers are respectively connected with the input ends of the more than two first single-pole multi-throw switches in a one-to-one correspondence manner; a plurality of output ends of each first single-pole multi-throw switch are respectively connected with one input end of each second single-pole multi-throw switch; and the output ends of the second single-pole multi-throw switches are respectively connected with the tested antennas.
4. The passive intermodulation test system of the multiband multi-antenna of claim 3, further comprising a connection member through which the output terminals of the second plurality of single-pole multi-throw switches are connected to the plurality of antennas under test, respectively.
5. The passive intermodulation test system of the multiband multi-antenna of claim 3, further comprising a multi-port repeater, wherein the controller is connected to the two or more intermodulation test instruments through the multi-port repeater, respectively.
6. The passive intermodulation test system of multiband multiple antenna of claim 2 or 5, wherein the connector comprises a test circuit board, on which a plurality of connection cables and a plurality of pins are arranged, the number of the connection cables and the number of the pins are consistent with the number of the antennas to be tested; the plurality of connecting cables are respectively connected with the plurality of thimbles in a one-to-one correspondence manner, and the plurality of thimbles are respectively connected with the plurality of antennas to be tested in a one-to-one correspondence manner.
7. The passive intermodulation test system of multiple band multiple antenna of claim 6 further comprising an antenna fixture by which the multiple antennas under test are disposed on the test circuit board.
8. The passive intermodulation test system of a multiband multiple antenna according to claim 1 or 3, wherein the intermodulation test instrument comprises a signal generator and a power amplifier, the signal generator being connected to the power amplifier.
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| WO2021147279A1 (en) * | 2020-01-23 | 2021-07-29 | 维沃移动通信有限公司 | Radio frequency front-end circuit and electronic device |
| CN113541725A (en) * | 2021-09-14 | 2021-10-22 | 上海豪承信息技术有限公司 | Diversity switch assembly, radio frequency device and communication equipment |
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