CN216209487U - Compact range air interface test equipment - Google Patents
Compact range air interface test equipment Download PDFInfo
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- CN216209487U CN216209487U CN202122305040.5U CN202122305040U CN216209487U CN 216209487 U CN216209487 U CN 216209487U CN 202122305040 U CN202122305040 U CN 202122305040U CN 216209487 U CN216209487 U CN 216209487U
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Abstract
The utility model discloses a compact range air interface test device, which comprises: the measuring antenna, the object placing table and the rotatable connecting rod are all positioned in the darkroom; the object placing table is used for placing a tested piece; rotatable connecting rod is used for fixing measure the antenna, measure the antenna setting and be in put thing platform top makes it is in to put the thing platform the quiet zone of measure the antenna, rotatable connecting rod can be arc motion is done to the top of being surveyed the piece, in order to drive measure the antenna right it carries out the spherical scanning to be surveyed the piece. The testing distance is effectively shortened by the compact field reflecting surface or the plane wave generator, so that the required dark room space is reduced, the tested pieces with different sizes can be better adapted through the lifting assembly, and the spherical scanning or measurement of the tested pieces can be realized through the rotatable connecting rod.
Description
Technical Field
The utility model relates to the technical field of antenna testing devices, in particular to compact range air interface testing equipment.
Background
The antenna is generally in a far field state when used for communication, radar, remote control, etc., so that an ideal test field capable of providing uniform plane electromagnetic waves is required to correctly measure the radiation characteristic of the antenna. In order to reduce the measurement error caused by the phase difference of the electromagnetic waves incident on the aperture of the antenna to be measured, the distance R between the antenna to be measured and the measurement antenna is required to be larger than the minimum test distance 2D 2/lambda. However, with the large-scale deployment of 5G, the operating frequencies of antennas, mobile phones, various intelligent internet of things terminals and the like gradually increase, and the distances of far-field conditions of large-scale tested pieces such as base station antennas, intelligent refrigerators, power cabinets and the like become very long, and if the far-field measurement is directly performed, the microwave dark room needs to be very large in size, and the cost is increased.
One of the common methods of near field antenna testing, except for the far field. Among them, in the field of testing antennas and terminals, the multi-probe spherical field is widely accepted with the most testing efficiency and relatively small size. However, the existing multi-probe spherical near field is not formed on an active test algorithm of a 5G base station complete machine, and measurement under the near field distance cannot be carried out. Meanwhile, in order to improve the testing precision, the more sampling points are needed by the near-far field conversion algorithm, the more probes are needed, the larger the testing radius is, the larger the overall space size is, and particularly for large-volume equipment, the height of the spherical near field of a 128 probe is often more than 10 meters.
The conventional compact range also faces the problem of large size, and one of the new technologies adopts a plane wave generator test system, so that the test distance can be effectively shortened. However, in order to measure a 3D radiation pattern, U-shaped rotary tables are mostly adopted in the two fields, and aiming at large-size equipment, the rotary tables are complex in design, large in rotation radius and inconvenient to test.
SUMMERY OF THE UTILITY MODEL
The utility model provides a compact range air interface test device, which comprises: the measuring antenna, the object placing table and the rotatable connecting rod are all positioned in the darkroom;
the object placing table is used for placing a tested piece;
rotatable connecting rod is used for fixing measure the antenna, measure the antenna setting and be in put thing platform top makes it is in to put the thing platform the quiet zone of measure the antenna, rotatable connecting rod can be arc motion is done to the top of being surveyed the piece, in order to drive measure the antenna right it carries out the spherical scanning to be surveyed the piece.
Furthermore, a rotating assembly is arranged on the plane of the object placing table away from the measured piece, and the object placing table can adjust the positions of the measured piece and the measuring antenna through the rotating assembly;
the object placing table is far away from the plane of the measured piece, and a lifting assembly is further arranged on the plane of the object placing table and used for adjusting the position of the measured piece in the quiet zone.
Further, the rotatable connecting rod comprises: a fixed section and a movable section;
one end of the movable section is movably connected with one end of the fixed section, and the other end of the movable section is used for fixing the measuring antenna; one end of the fixed section is fixed in the darkroom;
the movable section can use the connecting point of the fixed section as an axis to do arc motion above the object placing table.
Further, the rotatable connecting rod further comprises: a drive motor and an antenna mounting plate;
the driving motor is arranged at the connecting point and is used for driving the movable section to rotate in an arc shape;
the measuring antenna is fixed at the other end of the movable section through the antenna mounting plate.
Furthermore, the fixed section and the movable section are both arc-shaped, the circle center of which is close to the object placing table.
Further, still include: the microprocessor is respectively connected with the measuring antenna, the driving motor, the rotating assembly and the lifting assembly and is used for setting and controlling parameters of connected devices, and the measuring instrument is respectively connected with the measuring antenna and a tested device; the device under test includes a passive or active antenna.
Further, the measuring instruments comprise a network analyzer, an oscilloscope, a frequency spectrograph, a vector signal generator and a vector signal analyzer.
Furthermore, the surface of the rotatable connecting rod is provided with a wave absorbing layer.
Further, the test antenna is one of: a metal reflector antenna, a lens antenna, or a plane wave generator;
the plane wave generator comprises a parabolic metal reflecting surface compact field with a feed source, a lens type compact field or a compact field reflector based on a probe array antenna.
Furthermore, the rotation angle of the movable section is more than or equal to 180 degrees.
The implementation of the utility model has the following technical effects:
according to the compact range air interface test equipment provided by the utility model, the design of a rotary table for three-dimensional radiation measurement in the prior art is simplified in a mode of scanning by the rotating assembly and the measuring antenna arranged on the arc-shaped sliding rail, when a tested piece is tested, the technical problem of overlarge rotating radius in the prior art can be reduced by applying the test equipment provided by the utility model, and the measuring antenna can realize spherical scanning of the tested piece through arc-shaped rotation of the rotatable connecting rod, so that the problem of space resource waste in a test area in the prior art is solved. The measuring antenna adopts an arc sliding mode to enable the sampling of the three-dimensional space to be more flexible.
The utility model effectively shortens the testing distance by tightening the reflecting surface of the field or the plane wave generator, thereby reducing the space of a darkroom. In addition, the lifting assembly is added, so that the device can be better adapted to the measured pieces with different sizes.
Drawings
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
FIG. 1 is a schematic structural diagram of a compact range air interface test equipment structure provided by the present invention;
wherein: 1-measuring antenna, 2-placing table, 4-darkroom, 5-measured piece, 6-microprocessor, 7-measuring instrument;
21-rotating assembly, 22-lifting assembly, 23-base;
31-fixed section, 32-movable section, 33-driving motor and 34-antenna mounting plate.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, and the "connection" may be either an electrical connection or a communications connection.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
In one aspect, the present invention provides a compact range air interface test device, and fig. 1 is a schematic structural diagram of a structure of the compact range air interface test device provided in the present invention, as shown in fig. 1, including: the measuring antenna 1, the object placing table 2 and the rotatable connecting rod are all positioned in the darkroom 4;
the object placing table 2 is used for placing a tested piece 5;
rotatable connecting rod is used for fixing measure antenna 1, measure antenna 1 and set up put 2 tops of thing platform, make it is in to put thing platform 2 the quiet zone of measure antenna 1, rotatable connecting rod can be arc motion is done to the top of survey piece 5, in order to drive measure antenna 1 is right it carries out the spherical scanning to be surveyed piece 5.
In particular, the camera 4 may be a microwave camera 4. The dead space is the area in the microwave anechoic chamber 4 where the interference of stray waves is the least. The electrical performance of the chamber 4 is described primarily by the characteristics of the quiet zone. The characteristics of the quiet zone are described in turn in terms of parameters such as the size of the quiet zone, the maximum reflectivity level within the quiet zone, cross-polarization, field strength uniformity, path loss, intrinsic radar cross section, operating frequency range, etc. Where the maximum reflectivity level in the quiet zone is the dominant factor. Therefore, a dark chamber 4 is designed, and the size of the dark chamber 4, the selection of the wave-absorbing material and the like are determined according to the performance index of the quiet zone. It is understood that the dead space is determined according to the size of the microwave anechoic chamber 4 and the like.
The measuring antenna 1 can be used for transmitting test signals from external equipment, such as a computer or the like, or for receiving signals from the piece under test 5. The measuring antenna 1 can adopt a metal reflecting surface antenna, a lens antenna or a plane wave generator, the plane wave generator is a one-dimensional or two-dimensional antenna array, unit arrays are arranged on the antenna array at equal intervals or unequal intervals, a phase shifting module and an amplitude modulation module are integrated behind each or a plurality of arrays, and specific excitation values are given to the unit arrays by changing the states of phase shifting and amplitude, so that quasi-plane waves can be formed in a short distance, and far-field test conditions are met. The compact range air interface test equipment provided by the utility model adopts the plane wave generator, can shorten the test distance, effectively reduces the test space, does not need to convert the collected data into a near-far-field algorithm any more after a far-field condition is formed, and reduces the difficulty of the system.
The function of the rotatable connecting rod is to drive the measuring antenna 1 (plane wave generator) to make mechanical movement in an arc-shaped track. That is, the arc-shaped motion track of the rotatable connecting rod may be that the measured object 5 is taken as a central point, and one side, the top and the other side of the measured object 5 are sequentially scanned by the measuring antenna 1 arranged at the end, and it can be understood that the measuring antenna 1 may scan or measure at least a half area of the measured object 5, that is, the rotation angle of the movable segment 32 is greater than or equal to 180 degrees.
In some possible embodiments, the object placing table 2 is provided with a rotating assembly 21 away from the plane of the object to be measured 5, and the object placing table 2 can adjust the positions of the object to be measured 5 and the measuring antenna 1 through the rotating assembly 21;
the object placing table 2 is far away from the plane of the measured piece 5, and a lifting assembly 22 is further arranged on the plane of the measured piece 5, wherein the lifting assembly 22 is used for adjusting the position of the measured piece 5 in a quiet area.
The object placing table 2 can be provided with a rotating assembly 21 and a lifting assembly 22 away from the plane on which the measured object 5 is placed, the object placing table 2 can adjust the position of the plane of the measured object 5 relative to the measuring antenna 1 through the rotating assembly 21, and the lifting assembly 22 is used for adjusting the position of the measured object 5 in a dead space. The rotating assembly 21 can be arranged at the bottom of the object placing table 2 to drive the detected piece 5 to rotate 0-360 degrees on the object placing table 2. The lifting component 22 can be located above the rotating component 21 and can be used for adjusting the height of the object placing table 2 in a plane perpendicular to the plane, the size and the position of the internal antenna of the object placing table are different due to the fact that the types of the object to be measured 5 are different, the object to be measured 5 can be located in a dead space of the position of the measuring antenna 1 during testing through the rotating component 21 and the lifting component 22, and the adaptability of the device is improved.
The tested piece 5 can comprise an intelligent Internet of things module and/or a terminal, such as an intelligent household appliance, an intelligent electric power cabinet and the like, and can also comprise various communication equipment such as a communication base station, an antenna, a radar and the like.
On the basis of the above embodiments, in an embodiment of the present specification, the rotatable connecting rod includes: a fixed section 31 and a movable section 32;
one end of the movable section 32 is movably connected with one end of the fixed section 31, and the other end of the movable section 32 is used for fixing the measuring antenna 1; one end of the fixed section 31 is fixed on the inner wall of the darkroom 4;
the movable section 32 can move in an arc shape above the object placing table 2 by taking the connection point of the fixed section 31 as an axis.
In some possible embodiments, a base 23 is further disposed below the object placing table 2 for fixing the rotating assembly 21 and the lifting assembly 22, and a plurality of universal wheels may be disposed below the base 23 for facilitating the movement of the object placing table 2.
The fixed section 31 and the movable section 32 are both arc-shaped with the circle center close to the object placing table 2.
Specifically, when the fixed section 31 and the movable section 32 are arc-shaped, the centers of circles of the fixed section 31 and the movable section 32 may be the same, that is, the fixed section 31 and the movable section 32 may form a concentric arc-shaped structure after being connected. One end of the fixed section 31 can be fixed inside the darkroom 4, optionally, one end of the fixed section 31 can be fixed on the base 23, and the other end of the fixed section 31 can be movably connected with one end of the movable section 32, so as to ensure that the movable section 32 can move in an arc shape towards two sides of the plane where the fixed section 31 is located by taking the connecting point as an axis. It should be noted that the centers of the movable section 32 and the fixed section 31 are on the side close to the object placing table 2.
The fixed section 31 and the movable section 32 may be movably connected, for example, the fixed section 31 and the movable section 32 may be connected in a telescopic manner, that is, the movable section 32 may adjust the height of the arc rotation of the movable section 32 in a telescopic manner, so as to adapt to more heights of the measured part 5.
On the basis of the above embodiment, in an embodiment of the present specification, the rotatable connecting rod further includes: a drive motor 33 and an antenna mounting plate 34;
the driving motor 33 is arranged at the connecting point and is used for driving the movable section 32 to rotate in an arc shape;
the measuring antenna 1 is fixed to the other end of the movable section 32 by the antenna mounting plate 34.
Specifically, the installation direction of the measuring antenna 1 may be determined according to the position of the object placing table 2.
On the basis of the above embodiments, in an embodiment of the present specification, the method further includes: the microprocessor 6 is respectively connected with the measuring antenna 1, the driving motor 33, the rotating assembly 21 and the lifting assembly 22 and is used for setting and controlling parameters of connected devices, and the measuring instrument 7 is respectively connected with the measuring antenna 1 and the measured device 5; the piece under test 5 comprises a passive or active antenna.
On the basis of the above embodiments, in an embodiment of the present specification, the measurement instrument 7 includes a network analyzer, an oscilloscope, a frequency spectrograph, a vector signal generator, and a vector signal analyzer.
In particular, the micro-chamber 4 is similar to the optical chamber 4, except that the micro-chamber 4 is shielded from electromagnetic waves of other wavelengths as well as visible light. The microwave dark room 4 can be a closed space made of wave-absorbing material, and it can be understood that the dark room 4 is a pure electromagnetic environment, so as to conveniently eliminate external electromagnetic interference. The material of the microwave dark room 4 can be any wave-absorbing material, such as ferrite wave-absorbing material, and the ferrite wave-absorbing material has the characteristics of high absorption frequency band, high absorptivity, thin matching thickness and the like. The main working principle of the magnetic field generating device is that according to the rule that electromagnetic waves propagate in a medium from a low-magnetism guide direction to a high-magnetism guide direction, the high-magnetism-conductivity ferrite is used for guiding the electromagnetic waves, a large amount of radiation energy of the electromagnetic waves is absorbed through resonance, and then the energy of the electromagnetic waves is converted into heat energy through coupling. The microwave anechoic chamber 4 is used for antenna measurement. For indoor measurements, the anechoic chamber 4 should be able to radiate the transmitting antenna directly to the radio frequency energy outside the main beam region of the receiving antenna, and absorb or change its reflection direction as much as possible so that it does not enter the main beam region of the receiving antenna, i.e. a quiet zone approximately without reflection is provided in the region where the receiving antenna is located.
On the basis of the above embodiments, in an embodiment of the present disclosure, a connected length of the fixed section 31 and the movable section 32 should be greater than a preset distance length, where the preset distance length is half of a circumference of a circle where the fixed section 31 is located.
On the basis of the above embodiment, in an embodiment of the present specification, a wave absorbing layer is disposed on a surface of the rotatable connecting rod.
Specifically, in order to reduce the influence of the rotatable connecting rod on the test, a wave-absorbing material is laid on the surface of the rotatable connecting rod, and the specific wave-absorbing material is not specifically limited in the embodiment of the present specification and may be the same as the wave-absorbing material of the anechoic chamber 4.
On the basis of the above embodiments, in an embodiment of the present specification, the test antenna is one of: a metal reflector antenna, a lens antenna, or a plane wave generator;
the plane wave generator comprises a parabolic metal reflecting surface compact field with a feed source, a lens type compact field or a compact field reflector based on a probe array antenna.
On the basis of the above embodiments, in one embodiment of the present specification, the diameter of the circle on which the arc-shaped track is located is larger than the length or width of the measured piece 5.
During the measurement process, the microprocessor 6 can be connected with a test instrument (such as a network analyzer) through a standard interface such as GPIB or USB; the device is connected with the measuring antenna 1, the driving motor 33, the rotating assembly 21 and the lifting assembly 22 through control interfaces; the test instrument is connected with each radio frequency unit, the plane wave generator, the antenna to be tested and the like through the radio frequency interface; the computer can control various test instruments, radio frequency equipment, plane wave generators, measured object rotating tables and the like, and further realize data scanning of the 3D spherical surface (or partial spherical surface), wherein the data scanning comprises amplitude and phase scanning and the like. The test meter is used for analyzing the test signal.
The purpose of compact range air interface test equipment test is as follows:
with the rapid development of wireless communication, the objects measured by OTA are beginning to be more expressed as intelligent terminals in various industries, such as consumer electronics, intelligent home appliances, smart grid, etc. The OTA test item mainly includes the radiation and receiving performance, such as TRP, which reflects the transmission power condition of the terminal complete machine and needs to be obtained by performing surface integration and averaging on the transmission power of the whole radiation 3D spherical surface. The device passes through the cooperation of azimuth axis and arc slide rail, has accomplished the sampling of each point on the 3D sphere space.
It should be noted that the compact range air interface test device can be placed in an external field or dark room 4 or other test environments, and can be used for performance measurement of the mobile communication device.
According to the compact range air interface test equipment provided by the utility model, the design of a rotary table for three-dimensional radiation measurement in the prior art is simplified in a mode that the rotary component 21 and the measuring antenna 1 arranged on the arc-shaped sliding rail scan, when large-scale intelligent equipment is tested, the application of the compact range air interface test equipment provided by the utility model can reduce the technical problem of overlarge rotating radius in the prior art, and can solve the problem of space resource waste in a test area in the prior art. The measuring antenna 1 adopts an arc sliding mode to enable the sampling of the three-dimensional space to be more flexible.
The present invention effectively shortens the test distance by tightening the field reflecting surface or the plane wave generator, thereby reducing the space of the darkroom 4 required. Moreover, the lifting assembly 22 is added, so that the device can be better adapted to the tested pieces 5 with different sizes.
It should be noted that, in the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is intended or should be construed to indicate or imply relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego the subject matter and should not be construed as an admission that the applicant does not consider such subject matter to be part of the disclosed subject matter.
Claims (10)
1. A compact range air interface test apparatus, comprising: the measuring antenna (1), the object placing table (2) and the rotatable connecting rod are all positioned in the darkroom (4);
the object placing table (2) is used for placing a tested piece (5);
rotatable connecting rod is used for fixing measure antenna (1), measure antenna (1) and set up put thing platform (2) top, make put thing platform (2) and be in the quiet zone of measuring antenna (1), rotatable connecting rod can be the arc motion is done to the top of being surveyed piece (5), in order to drive measure antenna (1) right it carries out the spherical scanning to be surveyed piece (5).
2. The compact air interface test equipment according to claim 1,
a rotating assembly (21) is arranged on the plane of the object placing table (2) far away from the measured piece (5), and the object placing table (2) can adjust the positions of the measured piece (5) and the measuring antenna (1) through the rotating assembly (21);
the object placing table (2) is far away from the plane of the measured piece (5), and a lifting assembly (22) is further arranged, wherein the lifting assembly (22) is used for adjusting the position of the measured piece (5) in a quiet zone.
3. The compact range opening testing apparatus of claim 2, wherein the rotatable connecting bar comprises: a fixed section (31) and a movable section (32);
one end of the movable section (32) is movably connected with one end of the fixed section (31), and the other end of the movable section (32) is used for fixing the measuring antenna (1); one end of the fixed section (31) is fixed in the darkroom (4);
the movable section (32) can do arc motion above the object placing table (2) by taking the connecting point of the fixed section (31) as an axis.
4. The compact range air interface test equipment of claim 3, wherein the rotatable connecting rod further comprises: a drive motor (33) and an antenna mounting plate (34);
the driving motor (33) is arranged at the connecting point and is used for driving the movable section (32) to rotate in an arc shape;
the measuring antenna (1) is fixed at the other end of the movable section (32) through the antenna mounting plate (34).
5. The compact range air interface testing device according to claim 4, wherein the fixed section (31) and the movable section (32) are both arc-shaped with the circle center near the object placing table (2).
6. The compact range air interface test equipment of claim 4, further comprising: the device comprises a microprocessor (6) and a measuring instrument, wherein the microprocessor (6) is respectively connected with the measuring antenna (1), the driving motor (33), the rotating assembly (21) and the lifting assembly (22) and is used for setting and controlling parameters of connected devices, and the measuring instrument is respectively connected with the measuring antenna (1) and a measured part (5); the piece under test (5) comprises a passive or active antenna.
7. The compact farm air interface test equipment of claim 3, wherein the instrumentation comprises a network analyzer, an oscilloscope, a spectrometer, a vector signal generator, and a vector signal analyzer.
8. The compact level air interface test equipment according to any one of claims 1 to 4, wherein the surface of the rotatable connecting rod is provided with a wave absorbing layer.
9. The compact range air interface test equipment according to any one of claims 1 to 4, wherein the measuring antenna is one of: a metal reflector antenna, a lens antenna, or a plane wave generator;
the plane wave generator comprises a parabolic metal reflecting surface compact field with a feed source, a lens type compact field or a compact field reflector based on a probe array antenna.
10. The compact range air interface test equipment according to any one of claims 3 to 5, wherein the rotation angle of the movable section (32) is equal to or greater than 180 degrees.
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| CN202122305040.5U CN216209487U (en) | 2021-09-23 | 2021-09-23 | Compact range air interface test equipment |
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| CN113848394A (en) * | 2021-09-23 | 2021-12-28 | 南京捷希科技有限公司 | Compact range air interface test equipment |
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| CN113848394A (en) * | 2021-09-23 | 2021-12-28 | 南京捷希科技有限公司 | Compact range air interface test equipment |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Room 312, Building B, Xingzhi Science and Technology Park, No. 6 Xingzhi Road, Nanjing Economic and Technological Development Zone, Jiangsu Province, 210038 Patentee after: Nanjing Jiexi Technology Co.,Ltd. Country or region after: China Patentee after: Jiangsu Weber Communication Technology Co.,Ltd. Address before: No. 278, Zhonghua Road, Qinhuai District, Nanjing, Jiangsu Patentee before: NANJING JIEXI TECHNOLOGY Co.,Ltd. Country or region before: China Patentee before: Jiangsu Weber Communication Technology Co.,Ltd. |