CN111856153A - Air interface testing device for multi-antenna wireless equipment - Google Patents
Air interface testing device for multi-antenna wireless equipment Download PDFInfo
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- CN111856153A CN111856153A CN201910354915.5A CN201910354915A CN111856153A CN 111856153 A CN111856153 A CN 111856153A CN 201910354915 A CN201910354915 A CN 201910354915A CN 111856153 A CN111856153 A CN 111856153A
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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
- G01R29/10—Radiation diagrams of antennas
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Abstract
The invention discloses a multi-antenna wireless equipment air interface testing device, which comprises: the wave absorbing material is arranged on the inner wall of the darkroom; the coupling probes are movably arranged in the darkroom and used for simultaneously or independently carrying out energy coupling transmission on the antenna in the preset near-field radiation range of the current probe position, wherein the maximum size of metal in all cross sections from the top of each coupling probe to the feeder line within 5 cm is less than or equal to 5 cm, so that the transceiving performance of the multi-antenna wireless device is obtained. According to the testing device provided by the embodiment of the invention, an independent near-field coupling mode can be adopted for the antenna, and the air interface test can be simultaneously or independently carried out on the antenna within the near-field radiation distance, so that the working efficiency of the test is improved, and the accuracy of the test is effectively improved.
Description
Technical Field
The invention relates to the technical field of wireless equipment performance testing, in particular to a multi-antenna wireless equipment air interface testing device.
Background
Before the wireless equipment is sold, the production line of the wireless equipment is mainly used for testing the transceiving performance of the wireless equipment, so that the wireless equipment with the radio frequency performance not meeting the requirement is prevented from being sold, and the user experience is prevented from being influenced.
However, in the related art, the test mode of the wireless device is a single-wire test, but as the number of antennas of the wireless device itself increases, for example, in the MIMO wireless device, there are a plurality of antennas for communication, if the radio frequency performance of each antenna needs to be tested, the time required for the test is long, and the test efficiency is low, and the related art is a far-field test, and the test system cost is high, which needs to be solved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the invention aims to provide a multi-antenna wireless equipment air interface testing device which can improve the working efficiency of testing and the accuracy of testing and is simple and easy to implement.
To achieve the above object, an embodiment of the present invention provides an air interface testing apparatus for a multi-antenna wireless device, including: the wave absorbing material is arranged on the inner wall of the darkroom; the coupling probes are movably arranged in the darkroom and used for simultaneously or independently carrying out energy coupling transmission on the antenna in a preset near-field radiation range of the current probe position, wherein the maximum size of metal in all cross sections of the top of each coupling probe, within 5 cm from the top of the probe, to the feeder line is less than or equal to 5 cm, so that the transceiving performance of the multi-antenna wireless device is obtained.
The air interface testing device of the multi-antenna wireless equipment of the embodiment of the invention simultaneously tests the performance of each antenna of the wireless equipment through the plurality of coupling probes, thereby realizing the purpose that the multi-antenna simultaneously or independently tests the near-field radiation distance.
In addition, the air interface testing apparatus for a multi-antenna wireless device according to the above embodiment of the present invention may further have the following additional technical features:
further, in an embodiment of the present invention, the preset near-field radiation range is obtained according to the following formula:
Wherein D is the maximum physical size of the multi-antenna wireless device, R is the radius of the near-field radiation range, and λ is the wavelength.
Optionally, in an embodiment of the present invention, a maximum dimension of the metal in the cross-section of each coupling probe is smaller than a maximum physical dimension of the multi-antenna wireless device.
Optionally, in an embodiment of the present invention, a maximum size of the metal in the cross-section of each coupling probe is smaller than a maximum physical size of the corresponding antenna.
Optionally, in an embodiment of the present invention, when the multi-antenna wireless device is a mobile terminal, the coupling probe is a broadband probe with a preset bandwidth.
Further, in an embodiment of the present invention, the method further includes: a placement component for placing the multi-antenna wireless device.
Further, in an embodiment of the present invention, the method further includes: and each moving assembly of the plurality of moving assemblies is respectively connected with each coupling probe of the plurality of coupling probes so as to change the position of the corresponding coupling probe.
Further, in an embodiment of the present invention, the method further includes: the vertical position adjusting piece is connected with the placing assembly to adjust the vertical height of the placing assembly.
Further, in an embodiment of the present invention, the method further includes: the first control assembly is connected with the vertical position adjusting piece and the placing assembly to control the vertical position adjusting piece and the placing assembly to execute corresponding actions, so that the multi-antenna wireless device reaches a target position.
Further, in an embodiment of the present invention, the method further includes: a second control component connected to each of the moving components, respectively, to adjust a position and a direction of each of the plurality of coupling probes according to the target position of the multi-antenna wireless device.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a multi-antenna wireless device under test according to the related art;
FIG. 2 is a schematic diagram of a far field test of an antenna wireless device according to the related art;
fig. 3 is a schematic diagram of near field testing of an antenna wireless device according to the related art;
fig. 4 is a schematic view of a coupling test of an antenna wireless device according to the related art;
fig. 5 is a schematic structural diagram of an air interface testing apparatus of a multi-antenna wireless device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a coupling probe according to one embodiment of the present invention;
fig. 7 is a schematic diagram of an air interface testing apparatus of a multi-antenna wireless device according to an embodiment of the present invention;
fig. 8 is a schematic diagram of an air interface testing apparatus of a multi-antenna wireless device according to another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Before describing the air interface testing apparatus for multi-antenna wireless devices according to the embodiments of the present invention, the following briefly describes the defects of the far-field test, the existing near-field testing technique, and the coupling test, taking the multi-antenna wireless terminal test as an example.
Specifically, as shown in fig. 1, a complete 4-antenna wireless terminal is used to simulate a tested piece, a PIFA antenna is placed at each of four corners of a 140 × 70mm PCB, the four antennas are connected to the same ground, and the antenna operates at 3.5 GHz.
In the related art far-field test, as shown in fig. 2, the tested piece is placed in a far-field large dark room, and the test method is as follows: the relative positions of the tested piece and the test antenna are changed by rotating the polar shaft of the rotary table, so that all radiation and receiving performances of the tested piece are tested. However, far field test distances are far enough to meet standard ranging requirements, where the test distance is greater than 2D2And D is the maximum physical size of the tested piece, and lambda is the wavelength, so that the darkroom is large in volume, large in occupied space and easy to be limited by a field, and each antenna is independently opened for evaluation, so that the test efficiency is low.
In the related art near field test, as shown in fig. 3, a plurality of test antennas are disposed inside a shielded room, so that a radiation or reception test is performed on a fixed position of a test object, and an overall value or a maximum value is used as a standard for evaluating performance of the test object. However, although the near-field test has small distance measurement, the shielding chamber can be made smaller, the occupied space is small, and the defect of the far-field test is overcome, the power received by each test antenna needs to be evaluated, the test efficiency is lower, and the test accuracy cannot be guaranteed.
In the related art coupling test, as shown in fig. 4, one or more coupling plates or coupling antennas are placed around the tested object, and all antennas are tested by one coupling antenna, wherein a plurality of coupling antennas are placed to adapt to the operating condition of a wide frequency band, such as one antenna for one test frequency band. Although the shielding chamber can be made very small and the cost is low, the performance of each antenna needs to be tested separately for a multi-antenna tested piece (all antennas cannot be tested simultaneously), the testing time is long, and the coupled antenna or the coupled plate is far away from some antennas, so that the gain is insufficient, the testing precision is low, and the testing accuracy cannot be guaranteed.
The present invention is based on the above problems, and provides an air interface testing apparatus for a multi-antenna wireless device.
The following describes an air interface testing apparatus for a multi-antenna wireless device according to an embodiment of the present invention with reference to the accompanying drawings.
Fig. 5 is a schematic structural diagram of an air interface testing apparatus of a multi-antenna wireless device according to an embodiment of the present invention.
As shown in fig. 5, the air interface testing apparatus 10 of the multi-antenna wireless device includes: a darkroom 100 and a plurality of coupling probes (shown as coupling probe 201, coupling probe 202, coupling probe 203, and coupling probe 204).
Wherein, the inner wall of the darkroom 100 is provided with a wave-absorbing material 101. The plurality of coupling probes are movably disposed in the darkroom 100 and are used for simultaneously or individually performing energy coupling transmission on the antenna within the preset near-field radiation range of the current probe position, wherein the maximum size of the metal in all cross sections within 5cm from the top of each coupling probe to the feeder line is less than or equal to 5cm, so as to obtain the transceiving performance of the multi-antenna wireless device 20. It can be understood that each coupling probe of the plurality of coupling probes can be movably disposed in a one-to-one correspondence manner in the plurality of antennas of the multi-antenna wireless device 20 and disposed within the preset near-field radiation distance, and simultaneously or individually perform energy coupling transmission on the multi-antenna wireless device 20 to be tested, so as to obtain the transceiving performance of the multi-antenna wireless device 20. The testing device 10 of the embodiment of the invention can adopt a single near-field coupling mode for the antennas, and can simultaneously or independently test a plurality of antennas in the near-field radiation distance, thereby not only improving the working efficiency of the test, but also effectively improving the accuracy of the test.
Specifically, as shown in fig. 6, it can be understood that the portion of the coupling probe within 5cm from the radiating top toward the feeder line direction satisfies: the maximum dimension of the metal of all cross sections is less than or equal to 5 cm. For example, a coupling probe consists of three parts: the coupling probe comprises a medium, a metal and a feeder line, wherein the feeder line is used for feeding radio frequency signals, the top of the coupling probe is a radiation top end, and any cross section meets the following conditions within a range from the top of the coupling probe to 5cm of the feeder line: the maximum dimension of the metal in all cross sections from the top to the 5cm of the feed line is less than 5cm, and it will be understood by those skilled in the art that any probe in fig. 6 can be configured in a similar manner, and is not limited to an antenna design of this structure, as long as the maximum dimension of the metal in the cross section is less than 5cm, so as to simultaneously or separately perform energy coupling transmission on the antenna within the near-field radiation distance of the current probe.
Optionally, in an embodiment of the present invention, the preset near-field radiation range is obtained according to the following formula:
Where D is the maximum physical size of the multi-antenna wireless device, R is the radius of the near-field radiation range, i.e., R is the near-field radiation distance, and λ is the wavelength.
In the embodiment of the present invention, the near field radiation test is implemented on the tested piece, but the near field radiation test is substantially different from the near field test in the related art, and the near field radiation test is described in detail below:
for example, the coupling probe and the multi-antenna wireless device 20 according to the embodiment of the present invention have an antenna distance smaller than the far field and are in near-field coupling, and specifically, for a small-sized antenna to be tested (the physical size is smaller than half of the wavelength), the distance from the position of the antenna to be tested R is defined as:
λ < R ≦ 2 λ belongs to the transmission near field region (transition zone);
2 lambda < R belongs to the radiation far field region.
Aiming at the tested piece, the distance between the coupling probe and the antenna of the tested piece is smaller than the far field condition, and the antenna is in a reaction near field region
For the measured antenna with electric size (the physical size is more than or equal to half of the wavelength), the distance from the measured antenna R is defined as,
For the tested piece, the distance between the coupling probe and the antenna of the tested piece is smaller than the far-field condition, and the coupling probe is in a radiation near-field region.
In summary, the testing apparatus 10 of the embodiment of the present invention can not only make each coupling probe correspond to one tested antenna, so as to obtain each antenna information of the multi-antenna wireless device 20 quickly, and even perform testing simultaneously, but also have smaller testing path loss compared with the related art, each tested antenna has one coupling antenna close to and corresponding to the tested antenna, and belongs to near field coupling, and the path loss is far smaller than that of the testing systems in all schemes in the related art, so that the testing dynamic is large.
Further, in one embodiment of the present invention, the maximum dimension of the metal within the cross-section of each coupling probe is less than the maximum physical dimension of the multi-antenna wireless device, and/or the maximum dimension of the metal within the cross-section of each coupling probe is less than the maximum physical dimension of the corresponding antenna.
It is appreciated that in embodiments of the present invention, the coupling probe size (without feeder) antenna aperture is smaller than the maximum physical size of the multi-antenna wireless device 20, and/or the coupling probe size (without feeder) antenna aperture is smaller than the maximum physical size of its corresponding antenna under test on the multi-antenna wireless device 20, thereby ensuring the accuracy of the test.
Optionally, in an embodiment of the present invention, when the multi-antenna wireless device is a mobile terminal, the coupling probe is a broadband probe with a preset bandwidth, for example, one probe covering all sub6G frequency bands can be used.
For example, in sub6G, when the mobile phone is used as a tested piece, at least 4 coupling probes are respectively located at 4 corners of the tested piece, and the coupling probes can be broadband probes, so that when the test frequency is changed, other antennas do not need to be switched, the simultaneous test of the transceiving performance of the multiple antennas can be realized, the test working efficiency is greatly improved, and the test time is reduced. Wherein, the preset bandwidth can be set by those skilled in the art according to actual situations.
In addition, in an embodiment of the present invention, the test apparatus 10 of the embodiment of the present invention further includes: and placing the component. Wherein the placement component is used to place the multi-antenna wireless device 20.
It is understood that a placement assembly, such as a placement table with clamps, may be provided in the darkroom 100 to place the multi-antenna wireless device 20 on the placement assembly to facilitate air interface testing of the multi-antenna wireless device 20. In addition, the placing assembly can also adjust the horizontal pose of the wireless setting 20, for example, the wireless setting 20 is controlled to change the pose clockwise, so as to meet the testing requirement.
Further, in an embodiment of the present invention, the testing apparatus 10 of the embodiment of the present invention further includes: a plurality of moving assemblies. Wherein each moving assembly of the plurality of moving assemblies is respectively connected with each coupling probe of the plurality of coupling probes so as to change the position of the corresponding coupling probe.
It is understood that the moving component can be a moving table provided with a roller to arbitrarily adjust the position of the coupling probe to achieve the corresponding arrangement with the antenna of the tested piece.
Further, in an embodiment of the present invention, the testing apparatus 10 of the embodiment of the present invention further includes: a vertical position adjusting member. Wherein, vertical position adjustment spare links to each other with placing the subassembly to the vertical height of adjustment placing the subassembly.
It can be understood that, a vertical position adjusting member is disposed at the implied bottom end, for example, two supports are disposed at an interval, each support may include two hinged rod bodies, a lower end of each rod body is rotatably fitted to the darkroom bottom end, and an upper end of each rod body is movably fitted to the placing table, so that the placing posture of the multi-antenna wireless device 20 can be adjusted by adjusting the vertical height of the placing assembly relative to the darkroom bottom end, to adjust according to the testing requirements, for example, the multi-antenna wireless device 20 is disposed at the center of the darkroom 100.
In the embodiment of the present invention, the placement member and the placement member may be movably disposed by the vertical position adjustment member, so that the antenna wireless device 20 may be conveniently adjusted in the horizontal direction and/or the vertical direction, and the flexibility and the applicability of the apparatus are improved.
Further, in an embodiment of the present invention, the testing apparatus 10 of the embodiment of the present invention further includes: a first control assembly. Wherein the first control assembly is connected to the vertical position adjustment assembly and the placement assembly to control the vertical position adjustment assembly and the placement assembly to perform corresponding actions so that the multi-antenna wireless device 20 reaches the target position.
It is understood that the vertical position adjustment and placement assembly can be controlled manually or automatically by a predetermined program, such as automatically raising and rotating the multi-antenna wireless device 20 to a testing position, i.e., a target position, required by the test to meet the testing requirements.
Further, in an embodiment of the present invention, the testing apparatus 10 of the embodiment of the present invention further includes: a second control assembly. Wherein the second control assembly is connected to each of the moving assemblies, respectively, to adjust the position and orientation of each of the plurality of coupled probes based on the target position of the multi-antenna wireless device 20.
It can be understood that the testing apparatus 10 according to the embodiment of the present invention can be adjusted manually or automatically by the control component, so as to improve the intelligence and controllability of the testing apparatus. Specifically, the measured part is placed on the placing component, the coupling probes are placed on the moving component, each coupling probe is connected with one moving component and can move independently, the placing component can lift, and then the one-to-one correspondence setting of the coupling probes and the antennas is realized, so that the measuring device is more flexible and is simple and easy to realize.
For example, after the tested object is fixed by the placing assembly, the operator may move the tested object to the midpoint position of the darkroom 100 by controlling the placing assembly and the vertical position adjusting assembly through the manual adjusting or controlling assembly, and then move the coupling probe to the corresponding position of each antenna of the tested object by controlling the moving assembly through the manual adjusting or controlling assembly, so as to perform the near-field coupling antenna test within the near-field radiation distance.
It can be understood that, in the embodiment of the present invention, the multi-antenna wireless device 20, that is, the device to be measured, is placed in a shielded darkroom 100, the inner wall of the darkroom 100 is provided with the wave-absorbing material 101, and a plurality of coupling probes are placed in the darkroom 100, the coupling probes are used for each coupling probe to align with one antenna on the multi-antenna wireless device 20 to perform energy coupling transmission, the coupling probes are all located in the near-field radiation range of the multi-antenna wireless device 20, and the positions and directions of the coupling antennas can be adjusted so that each coupling antenna and the corresponding antenna of the multi-antenna wireless device 20 form one-to-one coupling transmission.
Compared with a far field test, a near field test and a coupling test in the related technology, the embodiment of the invention can realize the rapid production line test of the multi-antenna wireless terminal, has higher working efficiency of the test, can effectively ensure the accuracy and precision of the test and effectively meet the test requirement.
The apparatus 10 of an embodiment of the present invention is described below by way of example in terms of serial testing and parallel testing.
The first embodiment is as follows:
first, the position and orientation of the coupling probes are maneuvered for the multi-antenna wireless device 20 to find the position and orientation of each coupling probe that meets the test requirements. The power test of a mobile phone production line with 4 antennas is taken as an example:
the antenna naming is as shown in fig. 7, and the mobile phone antenna names the tested antennas 1, 2, 3 and 4; the coupling probes are named coupling probes 5, 6, 7, 8.
Adjusting the positions of all the coupling probes to enable the physical positions of the coupling probes to be positioned in the near field of the mobile phone and close to the corresponding antenna positions, wherein the antenna 1 to be measured corresponds to the coupling antenna 5 in the example; the tested antenna 2 corresponds to the coupling antenna 6; the antenna to be measured 3 corresponds to the coupling antenna 7; the antenna under test 4 corresponds to the coupling antenna 8.
It will be appreciated that this step need only be done once for a product (or similar product). The position of the coupling probe corresponding to the test antenna can be found.
Secondly, each time one path of the antenna to be tested is opened, the power coupled to the corresponding coupling antenna is tested, such as: turning on the antenna to be tested No. 1 (turning off all other antennas to be tested), and reading the coupling energy record of the antenna to be coupled No. 5 as P5; turning on the antenna to be tested No. 2 (turning off all other antennas to be tested), and reading the coupling energy record of the antenna to be coupled No. 6 as P6; turning on the antenna to be tested No. 3 (turning off all other antennas to be tested), and reading the coupling energy record of the antenna to be coupled No. 5 as P7; turning on the antenna to be tested No. 4 (turning off all other antennas to be tested), and reading the coupling energy record of the antenna to be coupled No. 5 as P8; after the completion, the differences between the P5, P6, P7 and P8 and the preset values or the test values of the golden machine (the golden machine refers to a standard machine which is verified to be trouble-free) are compared to judge whether a problem exists.
Example two:
the position and orientation of the coupling probes are first maneuvered for the multi-antenna wireless device 20 to find the position and orientation of each coupling probe that meets the test requirements. The power test of a mobile phone production line with 4 antennas is taken as an example:
the antenna naming is as shown in fig. 8, and the mobile phone antenna names the tested antennas 1, 2, 3 and 4; coupling Probe naming coupling probes 5, 6, 7, 8
Adjusting the positions of all the coupling probes to enable the physical positions of the coupling probes to be positioned in the near field of the mobile phone and close to the corresponding antenna positions, wherein the antenna 1 to be measured corresponds to the coupling antenna 5 in the example; the tested antenna 2 corresponds to the coupling antenna 6; the antenna to be measured 3 corresponds to the coupling antenna 7; the antenna under test 4 corresponds to the coupling antenna 8. And requires that the coupling energy between corresponding antennas be greater than the coupling energy between non-corresponding antennas. The concrete expression is as follows.
The fixed mobile phone, taking the position adjustment of the coupling antenna 5 as an example, explains: adjusting the position of the No. 5 coupling antenna to enable only the No. 5 coupling antenna to transmit, wherein the coupling energy on the No. 1 antenna to be tested is greater than the energy coupled to all other antennas to be tested; similarly, the position of the No. 6 coupling antenna is adjusted, so that only the No. 6 coupling antenna transmits, and the coupling energy on the No. 2 antenna to be tested is greater than the energy coupled to all other antennas to be tested; adjusting the position of the No. 7 coupling antenna to enable only the No. 7 coupling antenna to transmit, wherein the coupling energy on the No. 3 antenna to be tested is greater than the energy coupled to all other antennas to be tested; and adjusting the position of the No. 8 coupling antenna to enable only the No. 8 coupling antenna to transmit, wherein the coupling energy on the No. 4 antenna to be tested is larger than the energy coupled to all other antennas to be tested.
This step is done only once for a product (or similar product) to find the location where the coupling probe fits the test antenna.
Secondly, the tested antenna is opened at the same time, and the power coupled by the corresponding coupling antenna is tested, such as: recording the power of the No. 5 coupling antenna as Q5; recording the power of the No. 6 coupling antenna as Q6; recording the power of the No. 7 coupling antenna as Q7; recording the power of the No. 8 coupling antenna as Q8; after completion, the difference between the Q5, Q6, Q7 and Q8 and the preset value or the test value of the golden machine (the golden machine refers to a standard machine which is verified to be not problematic) is compared to judge whether a problem exists.
In summary, in the embodiment of the present invention, not only the test scheme is fast, and each coupling probe corresponds to one tested antenna, and can quickly obtain information of each antenna of the tested device, but also in the second embodiment, 4 pieces of tested antenna information can be obtained at one time, the test speed is much faster than that of the related art, and compared with the related art, the second embodiment has smaller test path loss, each tested antenna has one coupling antenna close to and corresponding to it, and belongs to near field coupling, and the path loss is much smaller than that of all test systems in the related art, so the test dynamic is large.
According to the air interface testing device of the multi-antenna wireless equipment, the performance of each antenna of the wireless equipment is tested simultaneously or independently through the plurality of coupling probes, the testing requirement is effectively met, the aim of simultaneously testing the plurality of antennas can be achieved, the antennas can be in an independent near-field coupling mode, namely, different antennas are in an independent coupling mode, the plurality of antennas can be tested simultaneously, the distance between the coupling probes and the antennas of the tested piece belongs to the near-field radiation distance which is smaller than the far-field distance and is in near-field coupling, the testing efficiency is effectively improved, the testing accuracy is effectively improved, and the air interface testing device is simple and easy to achieve.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. An air interface testing device for a multi-antenna wireless device, comprising:
the wave absorbing material is arranged on the inner wall of the darkroom;
the coupling probes are movably arranged in the darkroom and used for simultaneously or independently carrying out energy coupling transmission on the antenna in a preset near-field radiation range of the current probe position, wherein the maximum size of metal in all cross sections of the top of each coupling probe, within 5 cm from the top of the probe, to the feeder line is less than or equal to 5 cm, so that the transceiving performance of the multi-antenna wireless device is obtained.
2. The apparatus of claim 1, wherein the preset near-field radiation range is obtained according to the following formula:
Wherein D is the maximum physical size of the multi-antenna wireless device, R is the radius of the near-field radiation range, and λ is the wavelength.
3. The apparatus of claim 1, wherein a maximum dimension of the metal within the cross-section of each coupling probe is less than a maximum physical dimension of the multi-antenna wireless device.
4. A device according to claim 1 or 3, wherein the maximum dimension of the metal in the cross-section of each coupling probe is less than the maximum physical dimension of the corresponding antenna.
5. The apparatus of claim 1, wherein the coupling probe is a wideband probe with a predetermined bandwidth when the multi-antenna wireless device is a mobile terminal.
6. The apparatus of claim 1, further comprising:
a placement component for placing the multi-antenna wireless device.
7. The apparatus of claim 6, further comprising:
and each moving assembly of the plurality of moving assemblies is respectively connected with each coupling probe of the plurality of coupling probes so as to change the position of the corresponding coupling probe.
8. The apparatus of claim 7, further comprising:
the vertical position adjusting piece is connected with the placing assembly to adjust the vertical height of the placing assembly.
9. The apparatus of claim 8, further comprising:
the first control assembly is connected with the vertical position adjusting piece and the placing assembly to control the vertical position adjusting piece and the placing assembly to execute corresponding actions, so that the multi-antenna wireless device reaches a target position.
10. The apparatus of claim 9, further comprising:
a second control component connected to each of the moving components, respectively, to adjust a position and a direction of each of the plurality of coupling probes according to the target position of the multi-antenna wireless device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910354915.5A CN111856153A (en) | 2019-04-29 | 2019-04-29 | Air interface testing device for multi-antenna wireless equipment |
| PCT/CN2020/081379 WO2020220878A1 (en) | 2019-04-29 | 2020-03-26 | Multiple-antenna wireless device radio interface testing apparatus |
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| CN201910354915.5A CN111856153A (en) | 2019-04-29 | 2019-04-29 | Air interface testing device for multi-antenna wireless equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112834830A (en) * | 2021-02-05 | 2021-05-25 | 中国人民解放军海军航空大学航空作战勤务学院 | Antenna near-field coupling measurement device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834830A (en) * | 2021-02-05 | 2021-05-25 | 中国人民解放军海军航空大学航空作战勤务学院 | Antenna near-field coupling measurement device and method |
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