CN112305322A - Multi-probe antenna testing equipment and method based on spatial distribution - Google Patents
Multi-probe antenna testing equipment and method based on spatial distribution Download PDFInfo
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- CN112305322A CN112305322A CN201910695553.6A CN201910695553A CN112305322A CN 112305322 A CN112305322 A CN 112305322A CN 201910695553 A CN201910695553 A CN 201910695553A CN 112305322 A CN112305322 A CN 112305322A
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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
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0871—Complete apparatus or systems; circuits, e.g. receivers or amplifiers
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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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Abstract
The invention discloses a multi-probe antenna test device and a method based on spatial distribution, the test device comprises an anechoic chamber, a control console, an annular support, a semi-ring support, a rotary table of an object to be tested, a plurality of first probes and a plurality of second probes, the annular support and the semi-ring support are arranged in the anechoic chamber, the control console controls the rotary table of the object to be tested to rotate, the top of the semi-ring support is connected with the top of the annular support, the annular support and the semi-ring support form a first included angle, the rotary table of the object to be tested is arranged at the bottom of the annular support, the top of the rotary table of the object to be tested is positioned in the center of the annular support, the first probes are arranged on the annular support, and the second probes are arranged on the semi-ring support. The invention greatly improves the spatial angle resolution by a mode of spatially distributing a plurality of probes, and realizes the spatial extension of the distance of the probes to realize low coupling.
Description
Technical Field
The invention relates to the technical field of electromagnetic measurement, in particular to multi-probe antenna testing equipment and a multi-probe antenna testing method based on spatial distribution.
Background
The existing multi-probe antenna test method realizes oversampling by uniformly or non-uniformly distributing enough probes on a single annular support. With the rapid development of the current measurement requirements, the number of probes required for a test system has increased dramatically. Arranging a large number of probes on a single ring carrier in a limited space will present a number of technical difficulties. One of them is the coupling problem caused by the over-dense arrangement of the probes, and the coupling effect between the probes seriously affects the accuracy of the measuring system. Therefore, how to properly arrange a large number of probes and how to realize the decoupling between the probes so as to improve the measurement accuracy and efficiency of the system is one of the technical problems in designing the measurement system such as the microwave darkroom and the like at present.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides multi-probe antenna testing equipment and a multi-probe antenna testing method based on spatial distribution.
The technical scheme of the invention is as follows:
a multi-probe antenna test device based on spatial distribution is characterized by comprising an anechoic chamber, a console, an annular bracket, a semi-ring bracket, an object to be tested turntable, a plurality of first probes and a plurality of second probes,
the annular support and the semi-ring support are arranged in the anechoic chamber, the console controls the object to be measured to rotate, the top of the semi-ring support is connected with the top of the annular support, a first included angle is formed between the annular support and the semi-ring support,
the object to be tested rotary table is arranged at the bottom of the annular support, the top of the object to be tested rotary table is located at the center of the annular support, the first probes are uniformly arranged on the annular support, and the second probes are uniformly arranged on the semi-ring support.
Preferably, the wave-absorbing cotton is arranged on the inner wall of the anechoic chamber, and the wave-absorbing cotton absorbs electromagnetic waves.
Preferably, the first included angle is theta, and theta is more than 0 degree and less than or equal to 360 degrees.
Preferably, the first included angle is 90 ° or 270 °.
Preferably, the included angle between the first probe at the top of the annular bracket and the second probe at the top of the semi-ring bracket is a second included angle.
Preferably, the included angle of each adjacent first probe of the ring-shaped support is a third included angle, and the third included angle is half of the second included angle.
Preferably, an included angle between each adjacent second probe of the half-ring bracket is a fourth included angle, and the fourth included angle is half of the second included angle.
A multi-probe antenna test method based on spatial distribution comprises any one of the above multi-probe antenna test devices based on spatial distribution, and is characterized by comprising the following steps:
absorbing electromagnetic waves through the anechoic chamber;
the object to be detected is driven to rotate by the object to be detected turntable;
extracting a first coupling coefficient of each adjacent first probe and a second coupling coefficient of each adjacent second probe;
and adjusting each first coupling coefficient and each second coupling coefficient through a numerical comparison method and software calibration to enable the coupling degree of each adjacent first probe to be equal and the coupling degree of each adjacent second probe to be equal.
Preferably, the first coupling coefficient and the second coupling coefficient are adjusted by adding decoupling circuits to the first probe and the second probe.
Preferably, the first coupling coefficient and the second coupling coefficient are adjusted by loading metamaterial structures on the first probe and the second probe.
The substantial effects of the invention are as follows: the invention respectively installs the probes on the ring bracket and the semi-ring bracket in a way of spatially distributing a plurality of probes, thereby greatly improving the spatial angular resolution and realizing the low coupling by expanding the distance of the probes in space; according to the invention, decoupling is realized by adopting software correction and hardware loading according to the principle that the coupling degrees of adjacent probes are equal, and the problem of coupling generated when the distance between the ring support and the top probe of the semi-ring support is relatively close is solved.
Drawings
FIG. 1 is a plan view of a structure according to an embodiment of the present invention;
FIG. 2 is a structural distribution diagram of a probe in a half-ring bracket according to an embodiment of the present invention;
FIG. 3 is a structural distribution diagram of a probe on a ring support according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a probe on a semi-ring stent mapped onto a ring stent according to an embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following figures and embodiments:
as shown in fig. 1 to 4, a multi-probe antenna test device based on spatial distribution comprises an anechoic chamber 11, a console, a ring-shaped support 12, a semi-ring support 13, a rotary table 14 for an object to be tested, a plurality of first probes and a plurality of second probes,
the ring-shaped support 12 and the semi-ring support 13 are arranged in the anechoic chamber 11, the console controls the object rotating table 14 to rotate, the top of the semi-ring support 13 is connected with the top of the ring-shaped support 12, the ring-shaped support 12 and the semi-ring support 13 form a first included angle,
the object rotary table 14 to be tested is arranged at the bottom of the annular support 12, the top of the object rotary table 14 to be tested is located at the center of the annular support 12, the first probes are uniformly arranged on the annular support 12, and the second probes are uniformly arranged on the semi-ring support 13.
And taking the center of the annular support 12 as an origin, wherein an included angle between the second probe at the top of the semi-ring support 13 and the first probe at the top of the annular support 12 is a second included angle. The included angle of each adjacent first probe of the ring-shaped support 12 is a third included angle, and the third included angle is 2 times of the second included angle. The included angle of each adjacent second probe of the half-ring bracket 13 is a fourth included angle, and the fourth included angle is 2 times of the second included angle. From the space, the plane where the semi-ring support 13 is located is mapped onto the plane where the ring support 12 is located in a rotating manner, and it can be seen that each second probe on the semi-ring support 13 is just inserted between every two first probes on the ring support 12, so that the spatial angular resolution is doubled.
Preferably, the wave-absorbing cotton is arranged on the inner wall of the anechoic chamber 11, and the electromagnetic wave is absorbed by the wave-absorbing cotton to reduce electromagnetic reflection.
Preferably, the first included angle is theta, and theta is more than 0 degree and less than or equal to 90 degrees. Further, the first included angle is 90 °.
Preferably, a coordinate system is established by taking the center of the annular support 12 as an origin and taking a first probe pointing to the top of the annular support 12 as the z-axis positive direction, and the first probe and the second probe are distributed at intervals in the pitch angle θ direction.
A multi-probe antenna test method based on spatial distribution comprises any one of the multi-probe antenna test devices based on spatial distribution, and is characterized by comprising the following steps:
step S1: the electromagnetic wave is absorbed by the anechoic chamber 11.
Step S2: the object to be tested is driven to rotate by the object to be tested turntable 14.
Step S3: a first coupling coefficient of each adjacent first probe and a second coupling coefficient of each adjacent second probe are extracted.
Step S4: and adjusting each first coupling coefficient and each second coupling coefficient through a numerical comparison method and software calibration to ensure that the coupling degree of each adjacent first probe is equal to the coupling degree of each adjacent second probe.
Preferably, the first and second coupling coefficients are adjusted by adding decoupling circuits to the first and second probes.
Preferably, the first coupling coefficient and the second coupling coefficient are adjusted by loading the metamaterial structure on the first probe and the second probe.
As shown in fig. 2 and 3, the total number of the first probes on the ring-shaped support 12 is 47, and the first probes on the ring-shaped support 12 are respectively a first probe P1, a first probe P2, a first probe … and a first probe P47 which are clockwise rotated for one circle from the first probe P1 at the bottom; wherein the first probe P24 is the top probe of the torus shaped stent. The total number of the second probes on the semi-ring bracket 13 is 24, and the second probes P ' 1, P ' 2, … and P ' 24 on the semi-ring bracket 13 are respectively formed by clockwise winding a circle from the top; the second probe P' 1 is the probe on top of the half-ring bracket 13.
The included angle between two adjacent first probes on the annular support 12 is 7.5 °. The included angle between the top probe P' 1 on the half-ring support 13 and the top probe P24 on the ring support 12 is 3.75 ° to phi 1/2, and the included angle between two adjacent second probes on the half-ring support 13 is 7.5 °.
Therefore, in terms of space, if the plane where the half-ring support 13 is located is mapped onto the plane where the ring support 12 is located, it can be seen that the probes of the half-ring support 13 are just inserted between the first probes of the ring support 12, respectively, fig. 4 shows a schematic diagram that the probes on the half-ring support 13 are mapped onto the ring support 12, it can be seen that the spatial included angles between all the probes are 3.75 °, and therefore, the spatial angular resolution obtained by the system is 3.75 °.
Since the top first probe P24 on the ring support 12 is closest to the top second probe P' 1 on the half-ring support 13, the actual distance is related to the number of probes placed and the diameter of the ring. The coupling effect generated by the first probe P24 and the second probe P' 1 is much larger than that generated by other probes, and the coupling between the two probes has a large influence on the system test accuracy.
When the measuring system operates normally, each probe works independently, and meanwhile, the consistency of the radiation performance of the probes needs to be kept, so that extra errors caused by the inconsistency of the performance of the probes in the test can be avoided; according to the fact that the coupling degrees of the probes near the junction of the ring-shaped support 12 and the semi-ring support 13 are equal, taking five probes as an example for comparison, the coupling degrees of the first probe P22, the first probe P23, the first probe P24, the first probe P25 and the first probe P26 of the ring-shaped support 12 are equal; meanwhile, the coupling degrees of the second probe P ' 1, the second probe P ' 2, the second probe P ' 3, the second probe P ' 4 and the second probe P ' 5 of the semi-ring bracket 13 are equal to each other, so that the semi-ring bracket can obtain the condition that the coupling degrees are equal
Wherein S is the coupling degree of the probes, K1 and K' 1 are coupling coefficients less than or equal to 1, and the closer the values are to 1, the closer the coupling degree between every two probes is.
Specifically, in order to satisfy the expressions (1) and (2), it is only necessary to adjust the values of the coefficients K1, K2, K3, K4, and K '1, K' 2, K '3, K' 4, respectively.
Specifically, in order to obtain the coefficients K1, K2, K3, K4, and K '1, K' 2, K '3, and K' 4 so that the equations (1) and (2) are simultaneously established, a decoupling circuit can be added between probes on hardware, and metamaterial structures and other methods can be loaded to adjust the coefficients; at the same time, the optimal coefficient combination is achieved through software correction.
The method combining the software correction and the hardware loading can realize the purpose of the multi-probe decoupling technology.
The substantial effects of the invention are as follows: the invention respectively installs the probes on the ring-shaped bracket and the semi-ring bracket in a mode of spatially distributing a plurality of probes, thereby greatly improving the spatial angular resolution and realizing the low coupling by expanding the distance of the probes in space; according to the invention, decoupling is realized by adopting software correction and hardware loading according to the principle that the coupling degrees of adjacent probes are equal, and the problem of coupling generated when the distance between the ring support and the top probe of the semi-ring support is relatively close is solved.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
The invention is described above with reference to the accompanying drawings, which are illustrative, and it is obvious that the implementation of the invention is not limited in the above manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and technical solution, or to apply the inventive concept and technical solution to other fields without modification.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113433395A (en) * | 2021-06-09 | 2021-09-24 | 北京大学 | Electromagnetic pulse radiation characteristic measuring device and measuring method thereof |
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CN202000994U (en) * | 2010-12-13 | 2011-10-05 | 西安威盛电子仪器有限公司 | Double far-field electromagnetic focusing thickness meter |
CN202362271U (en) * | 2011-11-10 | 2012-08-01 | 成都中鼎华强科技有限公司 | Probe box applied to wellhead nondestructive examination on drilling rig |
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CN105547664A (en) * | 2015-12-04 | 2016-05-04 | 大庆市万和石油科技开发有限公司 | Petroleum drilling machine crown block fast wheel operation state non-contact measurement method |
CN108020170A (en) * | 2017-12-11 | 2018-05-11 | 中北大学 | A kind of not equidistant dislocation type collocation structure of optical intensity modulation type fibre optical sensor |
CN210894512U (en) * | 2019-07-30 | 2020-06-30 | 泰姆瑞技术(深圳)有限公司 | Multi-probe antenna test equipment based on spatial distribution |
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- 2019-07-30 CN CN201910695553.6A patent/CN112305322A/en active Pending
Patent Citations (7)
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CN202000994U (en) * | 2010-12-13 | 2011-10-05 | 西安威盛电子仪器有限公司 | Double far-field electromagnetic focusing thickness meter |
CN202362271U (en) * | 2011-11-10 | 2012-08-01 | 成都中鼎华强科技有限公司 | Probe box applied to wellhead nondestructive examination on drilling rig |
CN203906183U (en) * | 2014-03-10 | 2014-10-29 | 刘海龙 | Two-way contra-rotating round rail carrying Y-shaped multi-blade fluid energy collecting multi-unit power generating windmill |
CN105547664A (en) * | 2015-12-04 | 2016-05-04 | 大庆市万和石油科技开发有限公司 | Petroleum drilling machine crown block fast wheel operation state non-contact measurement method |
CN105470816A (en) * | 2015-12-25 | 2016-04-06 | 王鹏 | Lightning protection apparatus used for overhead line |
CN108020170A (en) * | 2017-12-11 | 2018-05-11 | 中北大学 | A kind of not equidistant dislocation type collocation structure of optical intensity modulation type fibre optical sensor |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113433395A (en) * | 2021-06-09 | 2021-09-24 | 北京大学 | Electromagnetic pulse radiation characteristic measuring device and measuring method thereof |
CN113433395B (en) * | 2021-06-09 | 2022-03-25 | 北京大学 | An electromagnetic pulse radiation characteristic measuring device and its measuring method |
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Effective date of registration: 20230826 Address after: 518000 Room 201, building 4, South Taiyun chuanggu, Tangwei community, Fenghuang street, Guangming District, Shenzhen, Guangdong Applicant after: Shenzhen Xinghang Wulian science and Technology Co.,Ltd. Address before: 103-102, Qixing Chuangye building, No.5, Beier lane, Chuangye 2nd Road, Dalang community, Xin'an street, Bao'an District, Shenzhen, Guangdong 518000 Applicant before: TERMWAY TECHNOLOGY (SHENZHEN) CO.,LTD. |