CN109030960B - S parameter testing method for 5G antenna filter integrated unit - Google Patents
S parameter testing method for 5G antenna filter integrated unit Download PDFInfo
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- CN109030960B CN109030960B CN201810488522.9A CN201810488522A CN109030960B CN 109030960 B CN109030960 B CN 109030960B CN 201810488522 A CN201810488522 A CN 201810488522A CN 109030960 B CN109030960 B CN 109030960B
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Abstract
A5G antenna filter integrated unit S parameter testing method is characterized in that a network vector analyzer, a multi-channel matrix switch and a multi-channel probe testing board are placed in a darkroom, one port of the network vector analyzer is connected with a CAL port in a 5G antenna filter integrated unit, the other port of the network vector analyzer is connected with an input port of the multi-channel matrix switch, one output port of the multi-channel matrix switch is connected with a back connector of one port of the multi-channel probe testing board, and a connector, connected with the multi-channel matrix switch and the multi-channel probe testing board, of the multi-channel matrix switch is inserted into any one metal probe testing hole in the first step, so that S parameters of a 5G antenna not integrated with a filter unit are obtained.
Description
Technical Field
The invention relates to the technical field of mobile communication 5G base stations, in particular to a method for testing S parameters of a 5G antenna filter integrated unit.
Background
The large-scale and light-weight antenna array design is the first problem to be solved by the 5G communication technology. The existing 5G AAS active antenna system adopts an antenna + RRU, a filter module is embedded in the RRU system, and a filter unit is integrated in an antenna part by the new generation AAS. The existing antenna feed and calibration network adopts a layout of a PCB microstrip line or a strip line, as shown in FIG. 1, the through feed network needs to be broken when the antenna filter is integrated, and then two ends of the through feed network are embedded into a filter unit, as shown in FIG. 2. Due to network open circuit, the existing antenna amplitude-phase consistency test method (testing antenna calibration CAL port to RF port S parameter) cannot work.
Disclosure of Invention
The invention aims to solve the problem that the existing antenna amplitude-phase consistency test method cannot be suitable for a novel antenna integrating a filter unit in an antenna part when the existing antenna amplitude-phase consistency test method is applied to a new generation of AAS (amplitude-phase-sequence), and provides a 5G antenna filter integration unit S parameter test method
In order to solve the technical problems, the invention adopts the technical scheme that:
A5G antenna filter integrated unit S parameter testing method comprises the following steps:
step one, arranging a darkroom;
step two, placing the 5G antenna filter integrated unit to be tested in the darkroom in the step one, connecting a section of microstrip line or strip line between each filter and the coupler in the 5G antenna filter integrated unit, and then connecting a metal probe test hole on each microstrip line or strip line;
thirdly, taking a network vector analyzer, a multi-channel matrix switch and a multi-channel probe test board, placing the network vector analyzer, the multi-channel matrix switch and the multi-channel probe test board into a darkroom, wherein one port of the network vector analyzer is connected with a CAL port in the 5G antenna filter integrated unit, the other port of the network vector analyzer is connected with an input port of the multi-channel matrix switch, one output port of the multi-channel matrix switch is connected with a back connector of one port of the multi-channel probe test board, and a connector of the multi-channel matrix switch and the multi-channel probe test board is inserted into any one metal probe test hole in the second step, so that S parameters of the 5G antenna not integrated with the;
step four, keeping the connection relation and parameters of the network vector analyzer, the multi-channel matrix switch and the multi-channel probe test board in the step three unchanged, and pulling out the connector connected with the multi-channel matrix switch inserted into the metal probe test hole connected in the step two to insert into the RF port on the corresponding line, so as to obtain S parameters of the line corresponding to the 5G antenna filter integrated unit;
and step five, repeating the step two to the step four until the measurement of all the lines is completed.
In order to solve the above technical problem, in the antenna-filter integrated unit, as shown in fig. 2, a microstrip line or a strip line is designed between the filter and the Coupler (Coupler), and a metal probe test hole T1/T2 is connected. Before embedding the filter, S parameters from an antenna calibration CAL port to a metal probe test hole T port are collected and used as antenna amplitude-phase consistency reference data. And (4) independently acquiring S parameters of the filter as the amplitude-phase consistency reference of the filter. After a Filter Unit (Filter Unit) is embedded, S parameters from the CAL port to the RF port are collected and used as integrated amplitude-phase consistency reference data of the antenna Filter. Through S parameter cascade derivation, the amplitude-phase consistency data of the filter after integration can be deduced. The method can solve the problem of respective amplitude and phase consistency of the antenna and the filter after the antenna filter is analyzed and integrated.
The invention has the beneficial effects that: the patent provides a new testing method for solving the problem of testing the amplitude-phase consistency among channels after the antenna filter is integrated, and the problem that the traditional testing method cannot be used is solved.
Drawings
Fig. 1 shows an antenna structure without an integrated filter.
Fig. 2 shows the antenna structure of the now integrated filter.
FIG. 3 is a schematic diagram of a multi-channel probe test board structure.
Fig. 4 is a schematic structural diagram of a network vector analyzer.
Fig. 5 is a schematic diagram of a multi-channel matrix switch structure.
Detailed Description
The specific embodiment shown in the figure is as follows:
A5G antenna filter integrated unit S parameter testing method comprises the following steps:
step one, arranging a darkroom;
step two, placing the 5G antenna filter integrated unit to be tested in the darkroom in the step one, connecting a section of microstrip line or strip line between each filter and the coupler in the 5G antenna filter integrated unit, and then connecting a metal probe test hole on each microstrip line or strip line;
thirdly, taking a network vector analyzer, a multi-channel matrix switch and a multi-channel probe test board, placing the network vector analyzer, the multi-channel matrix switch and the multi-channel probe test board into a darkroom, wherein one port of the network vector analyzer is connected with a CAL port in the 5G antenna filter integrated unit, the other port of the network vector analyzer is connected with an input port of the multi-channel matrix switch, one output port of the multi-channel matrix switch is connected with a back connector of one port of the multi-channel probe test board, and a connector of the multi-channel matrix switch and the multi-channel probe test board is inserted into any one metal probe test hole in the second step, so that S parameters of the 5G antenna not integrated with the;
step four, keeping the connection relation and parameters of the network vector analyzer, the multi-channel matrix switch and the multi-channel probe test board in the step three unchanged, and pulling out the connector connected with the multi-channel matrix switch inserted into the metal probe test hole connected in the step two to insert into the RF port on the corresponding line, so as to obtain S parameters of the line corresponding to the 5G antenna filter integrated unit;
and step five, repeating the step two to the step four until the measurement of all the lines is completed.
For the calibration of the parameters from the CAL port to the T port S of the test antenna, a network vector analyzer, a multi-channel matrix switch and a multi-channel probe test board are used, for example, a two-port network analyzer is used, one port 41 of the network vector analyzer is connected with the 5G antenna filter integrated unit calibration CAL port 21, and the other port 42 of the network vector analyzer is connected with the port 51 of the multi-channel matrix switch. The ports 52 of the multi-channel matrix switch are connected to the back connectors of the ports 32 of the multi-channel probe test board (as shown in fig. 3), the ports 32 of the probe test board are inserted into one of the ports T122 of the antenna board, and the S-parameters of the antenna without integrated filter are obtained by scanning and switching the multi-channel matrix switch. After the test is completed, the port 52 of the multi-channel matrix switch can be directly connected with the RF port, and is used for measuring the S parameter after the 5G antenna filter is integrated, so as to obtain the integrated S parameter. The test needs to be performed in a dark room environment.
The technical solutions and embodiments of the present invention are not limited, and the same solutions or effects as those of the technical solutions and embodiments of the present invention are within the scope of the present invention.
Claims (1)
1. A5G antenna filter integrated unit S parameter testing method is characterized in that: the method comprises the following steps:
step one, arranging a darkroom;
step two, placing the 5G antenna filter integrated unit to be tested in the darkroom in the step one, wherein the antenna filter integrated unit opens the through feed network and then embeds two ends of the through feed network into the filter unit, a section of microstrip line or strip line is connected between each filter and the coupler in the 5G antenna filter integrated unit, and then a metal probe test hole is connected on each microstrip line or strip line;
thirdly, taking a network vector analyzer, a multi-channel matrix switch and a multi-channel probe test board, placing the network vector analyzer, the multi-channel matrix switch and the multi-channel probe test board into a darkroom, wherein one port of the network vector analyzer is connected with a CAL port in the 5G antenna filter integrated unit, the other port of the network vector analyzer is connected with an input port of the multi-channel matrix switch, one output port of the multi-channel matrix switch is connected with a back connector of one port of the multi-channel probe test board, and a connector of the multi-channel matrix switch and the multi-channel probe test board is inserted into any one metal probe test hole in the second step, so that S parameters of the 5G antenna without the integrated filter unit are obtained and used as filter amplitude;
step four, keeping the connection relation and parameters of the network vector analyzer, the multi-channel matrix switch and the multi-channel probe test board in the step three unchanged, and pulling out the connector connected with the multi-channel matrix switch inserted into the metal probe test hole connected in the step two to insert into the RF port on the corresponding line, so as to obtain S parameters of the line corresponding to the 5G antenna filter integrated unit;
and step five, repeating the step two to the step four until the measurement of all the lines is completed.
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| WO2020232564A1 (en) * | 2019-05-17 | 2020-11-26 | 罗森伯格技术（昆山）有限公司 | Massive mimo antenna assembly and method for testing modules thereof |
| CN112039561B (en) * | 2019-05-17 | 2022-05-17 | 罗森伯格技术有限公司 | Massive MIMO antenna assembly and sub-module testing method thereof |
| CN110768733B (en) * | 2019-11-26 | 2021-12-14 | 武汉虹信科技发展有限责任公司 | Method and device for testing large-scale array antenna of integrated filter |
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| JP2003240817A (en) * | 2003-02-17 | 2003-08-27 | Nec Tokin Corp | High frequency characteristic measurement method for high frequency component |
| CN1728449A (en) * | 2004-07-29 | 2006-02-01 | 智邦科技股份有限公司 | Antenna |
| JP2006067236A (en) * | 2004-08-26 | 2006-03-09 | Sharp Corp | Radio communication system |
| CN201159750Y (en) * | 2008-02-04 | 2008-12-03 | 南京恩瑞特实业有限公司 | Intelligent antenna S parameter measuring equipment |
| KR20120072111A (en) * | 2010-12-23 | 2012-07-03 | 한국전자통신연구원 | Calibration method using a vector network analyser and delay time measurememt using the same |
| CN202034480U (en) * | 2011-01-13 | 2011-11-09 | 中国计量学院 | Microstrip antenna possessing filtering function |
| US9031523B2 (en) * | 2012-06-26 | 2015-05-12 | Htc Corporation | Systems and methods for determining antenna impedance |
| CN102830298B (en) * | 2012-07-27 | 2017-04-12 | 中兴通讯股份有限公司 | Method and device for testing radio frequency index and wireless index of active antenna system |
| CN103809056B (en) * | 2014-02-14 | 2016-08-24 | 南京捷希科技有限公司 | S parameter and passive intermodulation integrated test system |
| CN104967490B (en) * | 2015-04-30 | 2017-11-10 | 中国电子科技集团公司第四十一研究所 | A kind of free space transmission reflects calibration method |
| CN104993886B (en) * | 2015-07-02 | 2017-07-14 | 中国空间技术研究院 | A kind of amplitude-frequency phase-frequency characteristic plotting curves method of passive device |
| CN105548978B (en) * | 2015-12-16 | 2017-10-03 | 中国电子科技集团公司第四十一研究所 | A kind of phased array antenna active refelction coefficient test system and method |
| CN105720364B (en) * | 2016-04-06 | 2019-03-05 | 华南理工大学 | It is a kind of with highly selective and low-cross polarization dual polarization filter antenna |
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