CN112305331A - Measuring equipment and method based on multi-probe beam forming technology - Google Patents
Measuring equipment and method based on multi-probe beam forming technology Download PDFInfo
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- CN112305331A CN112305331A CN201910695520.1A CN201910695520A CN112305331A CN 112305331 A CN112305331 A CN 112305331A CN 201910695520 A CN201910695520 A CN 201910695520A CN 112305331 A CN112305331 A CN 112305331A
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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
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
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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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Abstract
The invention discloses a measuring device and a method based on a multi-probe beam forming technology, the measuring method based on the multi-probe beam forming technology is applied to the measuring device based on the multi-probe beam forming technology, the measuring device comprises an anechoic chamber, a console, an annular bracket, a rotating platform of an object to be measured, a beam forming network and at least two actual probes, and the measuring device comprises: absorbing electromagnetic waves and isolating external interference electromagnetic fields through the anechoic chamber; controlling the adjustment of the beam forming network through the console to control the rotation of the object to be tested turntable; the object to be detected is driven to rotate by the object to be detected turntable; and providing signal excitation for at least two actual probes through the beam forming network to generate at least one equivalent probe. The invention uses less probes, the distance between the probes is large, the coupling effect is not obvious, the precision of the test result is high, the structure is simple, and the efficiency is high.
Description
Technical Field
The invention relates to the technical field of measurement of antennas, microwave millimeter wave devices and wireless products, in particular to measuring equipment and a method based on a multi-probe beam forming technology.
Background
A method commonly used in the field of multi-probe method antenna, microwave millimeter wave device and wireless product measurement. The prior multi-probe method realizes oversampling by arranging enough probes uniformly or non-uniformly on the circumference of the bracket. With the development of 5G mobile communication technology, especially for measuring devices working in the millimeter wave frequency range, the demand of sampling points is rapidly increased, and the number of required sampling probes is also increased rapidly. The rapid increase in the number of sampling probes has made it difficult to arrange on a limited space ring support.
Because the installation space of the probes on the annular bracket is limited, the probes can be arranged more densely no matter the probes are arranged uniformly or unevenly, the number of the probes which can be arranged in the limited space is limited, and the coupling effect generated among the crowded probes influences the system test precision to a certain extent, so that how to realize more probes in the limited space and realize decoupling among the probes is one of the difficulties existing in the current measuring equipment and measuring method.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a measuring device and a measuring method based on a multi-probe beam forming technology.
The technical scheme of the invention is as follows:
a measuring method based on multi-probe beam forming technology is applied to measuring equipment based on multi-probe beam forming technology, the measuring equipment comprises an anechoic chamber, a console, an annular support, a rotating platform of an object to be measured, a beam forming network and at least two actual probes, and the measuring method is characterized by comprising the following steps:
absorbing electromagnetic waves and isolating external interference electromagnetic fields through the anechoic chamber;
controlling the adjustment of the beam forming network through the console to control the rotation of the object to be tested turntable;
the object to be detected is driven to rotate by the object to be detected turntable;
providing signal excitation for at least two actual probes through the beam forming network to generate at least one equivalent probe;
and assigning and determining the directionality, the gain, the phase, the beam width and the spatial position of the equivalent probe by controlling the excitation amplitude and the excitation phase of the signal excitation among the actual probes.
Preferably, the beam forming network is provided with output branches corresponding to the number of the actual probes, and each output branch provides specific signal amplitude and phase excitation for one actual probe.
Preferably, the pointing direction, gain, phase, beam width of the equivalent probe and the position of the equivalent probe on the torus by controlling the amplitude and phase excitation of signals specific to different ones of the output branches of the beam forming network.
Preferably, the actual number of probes is different to form a different number and position of equivalent probes.
A measuring device based on multi-probe beam forming technology is characterized by comprising an anechoic chamber, a console, an annular support, an object rotating table, a beam forming network and at least two actual probes, wherein the annular support is vertically arranged in the anechoic chamber, the console is respectively connected with the object rotating table and the beam forming network, the beam forming network is connected with the actual probes, the object rotating table is arranged at the bottom of the annular support, the top of the object rotating table is positioned at the center of the annular support, and the actual probes are arranged on the annular support;
the anechoic chamber is used for absorbing electromagnetic waves and isolating external interference electromagnetic fields;
the control console is used for controlling the adjustment of the beam forming network and controlling the rotation of the object to be detected turntable;
the object to be detected turntable is used for driving the object to be detected to rotate;
the beam forming network provides signal excitation for at least two actual probes to generate at least one equivalent probe;
and assigning and determining the directionality, the gain, the phase, the beam width and the spatial position of the equivalent probe by controlling the excitation amplitude and the excitation phase of the signal excitation among the actual probes.
Preferably, the actual probes are arranged uniformly or non-uniformly on the ring support.
Preferably, the inner wall of the anechoic chamber is a conductor layer which is used for isolating external electromagnetic waves, and the inner wall of the anechoic chamber is provided with wave-absorbing cotton which absorbs the electromagnetic waves.
Preferably, the wave-absorbing cotton is of a three-dimensional space structure, and the three-dimensional space structure is a cylinder, a sphere or a hexahedral diagram.
Preferably, the beam forming network is provided with output branches corresponding to the number of the actual probes, and each output branch provides specific signal amplitude and phase excitation for one actual probe.
Preferably, the console includes hardware and control software.
The substantial effects of the invention are as follows: the invention uses less actual probes, adopts the beam forming technology to obtain more equivalent probes, and the equivalent probes do not occupy the physical space on the actual annular bracket; the physical space of the actual probe on the annular bracket is far away, the coupling effect is not obvious, the coupling effect does not exist between the equivalent probe and the actual probe, and the measurement result is accurate; the invention has simple structure and high efficiency, the number of the used actual probes is far less than that of the existing multi-probe measuring system, and the problems of realizing more probes in a limited space and realizing decoupling between the probes are effectively solved.
Drawings
FIG. 1 is a schematic structural diagram of an anechoic chamber, an annular support, a turntable for an object to be measured, and an actual probe according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a beam forming network according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a console according to an embodiment of the present invention;
FIG. 4 is a structural distribution diagram of an equivalent probe generated on a toroidal support according to an embodiment of the present invention;
FIG. 5 is a structural distribution diagram of an equivalent probe generated on a toroidal support according to another embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following figures and embodiments:
as shown in fig. 1-5, a measurement method based on multi-probe beam forming technology is applied to a measurement device based on multi-probe beam forming technology, the measurement device includes a console 10, an anechoic chamber 11, a ring-shaped support 12, an object-to-be-measured turntable 13, a beam forming network 14 and at least two actual probes, and includes the following steps:
assigning values and determining the directionality, gain, phase, beam width and spatial position of the equivalent probe by controlling the excitation amplitude and the excitation phase of the signal excitation between the actual probes
Step S1: the electromagnetic wave is absorbed and the external interference electromagnetic field is isolated through the anechoic chamber 11;
step S2: the control console 10 controls the adjustment of the beam forming network 14 and controls the rotation of the object to be tested turntable 13;
step S3: the object to be detected is driven to rotate by the object to be detected rotary table 13;
step S4: providing signal excitation for at least two actual probes through a beam forming network 14 to generate at least one equivalent probe;
step S5: and assigning and determining the directionality, gain, phase, beam width and spatial position of the equivalent probe by controlling the excitation amplitude, the excitation phase and the system correction unit of the signal excitation among the actual probes.
By the method, the number of original actual probes can be extremely small, the number of equivalent probes generated by beam forming between any two or more actual probes is far larger than the number of original actual probes, and for example, for a common 24-probe electromagnetic detection system, the number of actual probes can be reduced to 5 by the method. The method not only reduces the number cost of the actual probes, but also solves the coupling problem caused by over-dense probe installation.
Specifically, the number of actual probes on the ring support 12 is N, the total number of beams generated by beam forming performed by two or more actual probes in any combination is equal to M,
therefore, after the beamforming technique, the total number of sampling probes available on the torus 12 is the sum T of the actual number of probes and the equivalent number of probes, i.e., T is M + N. And, the equivalent probe M is much larger than the actual probe N, obviously, the requirement of the multi-probe measuring system can be met by using a few actual probes.
Under the condition of few original actual probes, the actual probes can be arranged on the annular bracket 12 at a far distance, and the coupling effect between the actual probes is small and even can be ignored; meanwhile, the equivalent probe is not coupled with the actual probe, so that the method has the another advantage that the coupling effect between the probes is very small compared with the traditional multi-probe measuring system, and the accuracy of the measuring result can be greatly improved.
Preferably, the beam forming network 14 is provided with a number of output branches corresponding to the number of actual probes, and each output branch provides a specific signal amplitude and phase excitation for one actual probe.
Preferably, the pointing direction, gain, phase, beamwidth and position on the ring support 12 of the equivalent probe can be adjusted by controlling the amplitude and phase excitation of the signals specific to the different output branches of the beam forming network 14.
Preferably, different said actual number of probes forms different equivalent number and positions of probes.
Preferably, the beam width, gain, and beam width of the equivalent probe are the same as those of the actual probe, and the phase of the equivalent probe is obtained by adjusting the beam forming network 14.
Preferably, the equivalent probe positions are generated by the beam forming network 14 controlling the different actual probe numbers and signal excitations.
A measuring device based on multi-probe beam forming technology comprises a console 10, an anechoic chamber 11, an annular support 12, an object rotating table 13 to be measured, a beam forming network 14 and at least two actual probes, wherein the annular support 12 is vertically arranged in the anechoic chamber 11, the console 10 is respectively connected with the object rotating table 13 to be measured and the beam forming network 14, the beam forming network 14 is connected with the actual probes, the object rotating table 13 to be measured is arranged at the bottom of the annular support 12, the top of the object rotating table 13 to be measured is positioned at the center of the annular support 12, and the actual probes are arranged on the annular support 12;
an anechoic chamber 11 for absorbing electromagnetic waves and isolating external interfering electromagnetic fields;
the control console 10 is used for controlling the adjustment of the beam forming network 14 and controlling the rotation of the object to be tested rotary table 13;
the object to be tested rotary table 13 is used for driving the object to be tested to rotate;
the beam forming network 14 provides signal excitation for at least two actual probes to generate at least one equivalent probe;
and assigning and determining the directionality, gain, phase, beam width and spatial position of the equivalent probe by controlling the excitation amplitude and the excitation phase of signal excitation among the actual probes.
Preferably, the actual probes are arranged uniformly or non-uniformly on the toroidal support 12.
Preferably, the outer wall of the anechoic chamber 11 is a conductor layer, the conductor layer is used for isolating external electromagnetic waves, the inner wall of the anechoic chamber 11 is provided with wave-absorbing cotton 111, and the wave-absorbing cotton 111 absorbs the electromagnetic waves.
Preferably, the wave-absorbing cotton 111 is a three-dimensional space structure, and the three-dimensional space structure may be, but is not limited to, a cylinder, a sphere, or a hexahedral diagram.
Preferably, the beam forming network 14 is provided with a number of output branches corresponding to the number of actual probes, and each output branch provides a specific signal amplitude and phase excitation for one actual probe.
Preferably, the console 10 includes hardware and control software, and functions to issue commands to control the rotation of the turntable and the power distribution ratio and phase assignment of the beam forming network.
FIG. 4 is a schematic diagram of the distribution of the present invention for generating a new equivalent probe by a synthesized beam between two adjacent actual probes. As shown in fig. 4, 12 actual probes 1, 2, 3, …, 11, 12 are evenly distributed on the ring support; with the center of the ring support as the origin, the separation angle between each actual probe is 360/12-30 degrees. And obtaining a new equivalent probe N' by controlling the excitation amplitude, the phase and the system correction unit of the Nth and the (N + 1) th actual probes. The gain and the beam width of the equivalent sampling probe N' are the same as those of an actual probe. The position of the equivalent sampling probe N' is in the middle position of the Nth actual probe and the (N + 1) th actual probe. Thus, the equivalent probes produced by the 12 actual probes are 1 ', 2', 3 ', …, 11'. Specifically, the equivalent probe 1' is generated by the actual probe 1 and the actual probe 2 through beam synthesis; the equivalent probe 2' is generated by the actual probe 2 and the actual probe 3 through beam synthesis, and so on. In the scheme of the embodiment, 12 actual probes are utilized, 11 equivalent probes are obtained through the synthesized beam between two adjacent actual probes, and 23 probes are obtained in total, so that the requirement of a 24-probe method test system can be met. Compared with the traditional 24-probe method test system, the number of the actual probes is reduced by 11.
Fig. 5 shows the method of the present invention for generating a new equivalent sampling probe by a synthesized beam between two or more arbitrary combinations of not all adjacent actual probes. As shown in fig. 5, 11 actual probes 1, 2, 3, …, 11 are non-uniformly distributed on the ring-shaped support 12. Wherein, the center of the ring support is taken as an original point, and the included angle between adjacent actual probes is 30 degrees or 60 degrees. If the included angle between the adjacent actual probes is 30 degrees, an equivalent probe exists between the adjacent actual probes; if the included angle between adjacent actual probes is 60 degrees, two equivalent probes exist between the adjacent actual probes. Specifically, the equivalent probe 1' is obtained by beam-forming the actual probe 1 and the actual probe 2; the equivalent probe 2' is obtained by beam synthesis of the actual probe 2 and the actual probe 3; the equivalent probe 3 'and the equivalent probe 4' are obtained by beam forming among the actual probe 3, the actual probe 4 and the actual probe 5; the equivalent probe 5 'and the equivalent probe 6' are obtained by beam forming among the actual probe 4, the actual probe 5, the actual probe 6 and the actual probe 7; the equivalent probe 7 'and the equivalent probe 8' are obtained by beam forming among the actual probe 6, the actual probe 7 and the actual probe 8; the equivalent probe 9' is obtained by beam synthesis of the actual probe 8 and the actual probe 9; the equivalent probe 10 'and the equivalent probe 11' are obtained by beam synthesis among the actual probe 8, the actual probe 9, the actual probe 10 and the actual probe 11; the equivalent sampling probe 12' is obtained by beam combination of the actual probe 10 and the actual probe 11. Obviously, in the embodiment, 12 new equivalent probes are generated by selecting the synthetic beam between two or more than two arbitrarily combined non-all adjacent actual probes by using 11 actual probes, the total number of the probes can be ensured to be 24, and the requirement of the 24-probe method test system is met. Compared with the traditional 24-probe method test system, the number of the actual probes is reduced by 12.
The substantial effects of the invention are as follows: the invention uses less actual probes, adopts the beam forming technology to obtain more equivalent probes, and the equivalent probes do not occupy the physical space on the actual annular bracket; the physical space of the actual probe on the annular bracket is far away, the coupling effect is not obvious, the coupling effect does not exist between the equivalent probe and the actual probe, and the measurement result is accurate; the invention has simple structure and high efficiency, and the number of the used actual probes is far less than that of the existing multi-probe measuring system.
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.
Claims (10)
1. A measuring method based on multi-probe beam forming technology is applied to measuring equipment based on multi-probe beam forming technology, the measuring equipment comprises an anechoic chamber, a console, an annular support, a rotating platform of an object to be measured, a beam forming network and at least two actual probes, and the measuring method is characterized by comprising the following steps:
absorbing electromagnetic waves and isolating external interference electromagnetic fields through the anechoic chamber;
controlling the adjustment of the beam forming network through the console to control the rotation of the object to be tested turntable;
the object to be detected is driven to rotate by the object to be detected turntable;
providing signal excitation for at least two actual probes through the beam forming network to generate at least one equivalent probe;
and assigning and determining the directionality, the gain, the phase, the beam width and the spatial position of the equivalent probe by controlling the excitation amplitude and the excitation phase of the signal excitation among the actual probes.
2. The multi-probe beam forming technique based measurement method according to claim 1, wherein the beam forming network is provided with a number of output branches corresponding to the number of the actual probes, and each output branch provides a specific signal amplitude and phase excitation for one of the actual probes.
3. The multi-probe beamforming technique-based measurement method according to claim 2, wherein the pointing direction, gain, phase, beamwidth of the equivalent probe and the position of the equivalent probe on the torus by controlling the signal amplitude and phase excitation specific to different output branches of the beamforming network.
4. The multi-probe beam forming technique based measurement method of claim, wherein different actual probe numbers form different equivalent probe numbers and positions.
5. A measuring device based on multi-probe beam forming technology is characterized by comprising an anechoic chamber, an annular support, an object rotating table to be measured, a beam forming network and at least two actual probes, wherein the annular support is vertically arranged in the anechoic chamber, a console is respectively connected with the object rotating table to be measured and the beam forming network, the beam forming network is connected with the actual probes, the object rotating table to be measured is arranged at the bottom of the annular support, the top of the object rotating table to be measured is positioned at the center of the annular support, and the actual probes are arranged on the annular support;
the anechoic chamber is used for absorbing electromagnetic waves and isolating external interference electromagnetic fields;
the control console is used for controlling the adjustment of the beam forming network and controlling the rotation of the object to be detected turntable;
the object to be detected turntable is used for driving the object to be detected to rotate;
the beam forming network provides signal excitation for at least two actual probes to generate at least one equivalent probe;
and assigning and determining the directionality, the gain, the phase, the beam width and the spatial position of the equivalent probe by controlling the excitation amplitude and the excitation phase of the signal excitation among the actual probes.
6. The multi-probe beamforming technology-based measurement device according to claim 5, wherein the actual probes are uniformly or non-uniformly arranged on the ring support.
7. The measurement device based on the multi-probe beam forming technology of claim 6, wherein the anechoic chamber inner wall is a conductor layer, the conductor layer is used for isolating external electromagnetic waves, and the anechoic chamber inner wall is provided with wave-absorbing cotton, and the wave-absorbing cotton absorbs the electromagnetic waves.
8. The measuring equipment based on the multi-probe beam forming technology according to claim 7, wherein the wave-absorbing cotton is of a three-dimensional space structure, and the three-dimensional space structure is a cylinder, a sphere or a hexahedron.
9. The multi-probe beam forming technique based measurement device of claim 5, wherein the beam forming network is provided with a number of output branches corresponding to the number of actual probes, each output branch providing a specific signal amplitude and phase excitation for one of the actual probes.
10. The multi-probe beamforming technique based measurement device of claim 5, wherein the console comprises hardware and control software.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115102635A (en) * | 2022-06-14 | 2022-09-23 | 西安交通大学 | Air interface test system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115102635A (en) * | 2022-06-14 | 2022-09-23 | 西安交通大学 | Air interface test system and method |
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