CN206876773U - A kind of near field test system - Google Patents
A kind of near field test system Download PDFInfo
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- CN206876773U CN206876773U CN201720343250.4U CN201720343250U CN206876773U CN 206876773 U CN206876773 U CN 206876773U CN 201720343250 U CN201720343250 U CN 201720343250U CN 206876773 U CN206876773 U CN 206876773U
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- near field
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Abstract
The utility model discloses a kind of near field test system, including anechoic chamber, turntable, N number of test antenna (N is natural number and N ＞ 1), Antenna support structure, it is characterised in that the test antenna is installed on Antenna support structure with the distance different away from turntable at least two.The utility model can obtain the signal away from the different distance of measured piece at least two in single pass, and the phase information of measured piece can be obtained by calculating.Therefore on the premise of the testing time is not increased, connection cables can be avoided and use extra equipment, testing cost is reduced, also provide a simple and quick solution for the test of the active antenna without referenced interface.
Description
Technical field
It the utility model is related to field of measuring technique, more particularly to a kind of near field test system of wireless performance parameter.
Background technology
Antenna near-field test is divided into three kinds of sphere, cylinder and plane, and planar near-field test is generally used for that wave beam is narrower and method
To the antenna of radiation, cylinder near-field test is for general on orientation and the one of scanning plane of pitching has compared with broad beam and another
The narrower antenna of face wave beam, and sphere near-field test is generally used for various types of antennas.
In general, the test of active antenna is by the way of far field test, but for bore is larger or working frequency range
Higher antenna, its far field is in larger distance, and in general far field test condition can not meet, in this case, can use near
Field test.In the prior art, emitter or vector network analyzer need to be used to the near-field test of active antenna, respectively from hair
Penetrating source or the coupling of power amplifier end, to measuring instrumentss, the phase with measuring antenna is contrasted, obtained reference signal all the way
The phase information of sampling.This just needs to connect extra cable and equipment, on the one hand adds testing cost, is on the other hand increased
The connecting cable added can cause the uncertainty of test result to a certain extent.In addition, some novel all-in-ones is active
Antenna structure closely, does not remain for the radio frequency interface (hereinafter referred to as " referenced interface ") of above-mentioned reference device in advance, then without
Method is tested the phase of active antenna by the way of above-mentioned reference source.
Utility model content
For overcome the deficiencies in the prior art, the utility model proposes a kind of near-field test system suitable for active antenna
System, is not required to connect extra equipment (vector network analyzer) by cable, the active antenna of integration can be tested, especially
It is can to carry out phase alignment and measurement, and phased array antenna antenna pattern for active phase array antenna and its unit
Measurement.
To achieve the above object, the utility model first aspect embodiment proposes a kind of technical scheme：
A kind of near field test system, including anechoic chamber, turntable, N number of test antenna (N is natural number and N ＞ 1), antenna
Supporting construction, it is characterised in that the test antenna is installed on Antenna support structure with the distance different away from turntable at least two
On.
Further, the Antenna support structure also includes a rotating mechanism.
Further, the test antenna arranges in circular arc, and the turntable is located at the home position of the circular arc.
Further, the test antenna is in circular arrangement, and the turntable is located at the home position of the annulus.
Further, the Antenna support structure also includes a circumferentially rotated rotating machine of control test antenna
Structure.
Further, the circumferentially rotated angle of the Antenna support structure is less than or equal to away from turntable same distance
The maximum of the differential seat angle of adjacent test antenna.
Compared to existing test system, the utility model at least has the following advantages that：
1. test antenna is installed on Antenna support structure with the distance different away from turntable at least two, in single pass
The signal away from the different distance of measured piece at least two can be obtained, the phase information of measured piece can be obtained by calculating.Therefore exist
On the premise of not increasing the testing time, connection cables can be avoided and use extra equipment, testing cost is reduced, also for without ginseng
The test for examining the active antenna of interface provides a simple and quick solution.
2. coordinating the use of rotating mechanism to form the scanning plane of higher resolution, the precision of test is improved, and can reduce
The quantity of antenna is tested, interference caused by so as to reduce the reflection tested in darkroom between antenna.
3. the setting of different coverings can be carried out according to the difference of measured piece testing requirement by testing the space arrangement of antenna, such as quilt
The main radiation direction of part antenna is surveyed as normal direction or is concerned only with partial radiation characteristic, then test antenna can be arranged as circular arc,
Its radian size is set according to testing requirement；As measured piece antenna be omnidirectional or concern integral radiation characteristic, then can be by test days
Line is arranged as 360 ° of annular.
Brief description of the drawings
The above-mentioned and/or additional aspect of the utility model and advantage from the following description of the accompanying drawings of embodiments will
Become obvious and be readily appreciated that, wherein：
Fig. 1 is the schematic diagram of the utility model embodiment 1, anechoic chamber, not shown in figure；
Fig. 2 is the schematic diagram of the utility model embodiment 2, anechoic chamber, not shown in figure；
Fig. 3 is the schematic diagram of the utility model embodiment 3, anechoic chamber, not shown in figure；
Fig. 4 is the schematic diagram of the utility model embodiment 4, anechoic chamber, not shown in figure.
Embodiment
Embodiment of the present utility model is elaborated below.It is emphasized that the description below is only example
Property, it is intended to for explaining the utility model, and it is not intended that to limitation of the present utility model.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or two
More than, unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the utility model.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it
" under " can directly be contacted including the first and second features, it is not directly to contact but lead to that can also include the first and second features
The other characterisation contact crossed between them.Moreover, fisrt feature second feature " on ", " top " and " above " include the
One feature is directly over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.First is special
Sign second feature " under ", " lower section " and " below " including fisrt feature directly over second feature and oblique upper, or only
Represent that fisrt feature level height is less than second feature.
The utility model near field test system includes anechoic chamber, and the turntable for placing measured piece is used for inside darkroom,
Antenna support structure inside darkroom, and (N is natural number and N ＞ to the N number of test antenna being installed on Antenna support structure
1).Refering to Fig. 1, in the utility model embodiment 1, Antenna support structure 201 is semicircular arc, and turntable 101 is located at the semicircle
The home position of arc, 6 first test antennas 301 and 7 second test antennas 302 are installed on Antenna support structure 201, its
In the first test antenna 301 it is relatively near away from turntable 101, the second test antenna 302 away from turntable 101 farther out.Antenna support structure 201 is also
Including a rotating mechanism 401.Rotating mechanism 401 can be the arc-shaped guide rail driven by motor-driven gear, or other
The structure rotated can be achieved.In embodiment 1, test antenna is symmetrical, therefore 180 ° of the rotation of turntable 101 can complete hemisphere face
Scanning.If testing antenna asymmetric distribution, turntable 101 need to rotate 360 °.Antenna support structure 201 can pass through rotating mechanism
401 control test antennas are circumferentially rotated, so as to improve scanning sample precision, the circumferentially rotated angle etc.
When the maximum of the differential seat angle of the adjacent test antenna away from the same distance of turntable 101, you can realize full luffing angle (measured piece
± 90 ° around normal direction) scanning, and sampling precision can flexible modulation as needed.In the present embodiment, due to testing antenna
Be uniformly distributed, the differential seat angle of the adjacent test antenna away from the same distance of turntable 101 is 15 °, therefore, when test antenna circumferentially
When the angle that direction rotates covers 15 °, you can realize the scanning of full luffing angle.During test, the first test antenna 301 can be passed through
Obtain away from the signal at measured piece closer distance, the signal away from measured piece compared with distant location obtained by the second test antenna 302,
When turntable 101 completes 180 ° of rotation, you can obtain the hemispherical sample information of two different radiis, pass through different radii
On amplitude information can calculate the phase information for obtaining measured piece, and the far field of measured piece can be obtained by Near-far fields transfer algorithm
Radiation characteristic.It follows that the utility model on the premise of the testing time is not increased, can avoid connection cables and using extra
Equipment, reduce testing cost, reduce the noise jamming in darkroom, the also test for the active antenna without referenced interface carries
A simple and quick solution is supplied.
Refering to Fig. 2, the near field test system of the utility model embodiment 2 is substantially the same manner as Example 1, and difference is
Antenna support structure 201 is the half of positive 20 quadrangle, and polygonized structure is easy to test the positioning and installation of antenna, test days
Line still arranges in circular arc.
Refering to Fig. 3, the near field test system of the utility model embodiment 3 is substantially the same manner as Example 2, and difference is
Antenna support structure 201 is positive ten octagon, the 9 first test antennas 301 and 9 second test antennas being mounted thereon
302 be in circular arrangement.In addition, the differential seat angle of the adjacent test antenna away from the same distance of turntable 101 is 20 °, therefore, work as survey
When the circumferentially rotated angle of examination antenna covers 20 °, the scanning of full luffing angle can be achieved.
Refering to Fig. 4, the near field test system of the utility model embodiment 4 is similar to previous embodiment, and difference is
Antenna support structure 201 is linear, and the 5 first test antennas 301 and 4 second test antennas 302 being mounted thereon are in
Arranged in a straight line, on test antenna center axis of symmetry, Antenna support structure 201 can be controlled turntable 101 by rotating mechanism 401
System test antenna moves along a straight line in its orientation.When turntable 101 completes 180 ° of rotation, you can obtain two away from tested
The sample information of the circular flat of part different distance.
Above-described embodiment only lists several situations and illustrated, and the quantity that antenna is tested in the utility model is only to show
, the quantity that antenna is tested in practical application is multifactor related to test frequency, testing radius, antenna performance etc.；In embodiment
The arrangement mode of test antenna, the rotating manner of turntable and angle/distance, the rotating manner for testing antenna and angle/distance are only
For example, can be configured in practical application according to specific testing requirement, except hemisphere Surface scan, the sphere in embodiment are swept
Retouch, outside flat scanning, also cylinder scanning can be realized by the rotating manner and angle/distance for adjusting turntable and test antenna, or
The scanning of given shape.
Above content is to combine specific/preferred embodiment further detailed description of the utility model, no
It can assert that specific implementation of the present utility model is confined to these explanations.For the common skill of the utility model art
For art personnel, without departing from the concept of the premise utility, it can also make to the embodiment that these have been described
Some replacements or modification, and these are substituted or variant should all be considered as belonging to the scope of protection of the utility model.
Claims (6)
1. a kind of near field test system, including anechoic chamber, turntable, N number of test antenna, N is natural number and N ＞ 1, antenna mounting
Structure, it is characterised in that the test antenna is installed on Antenna support structure with the distance different away from turntable at least two.
2. near field test system as claimed in claim 1, it is characterised in that the Antenna support structure also includes a rotation
Mechanism.
3. near field test system as claimed in claim 1, it is characterised in that the test antenna arranges in circular arc, described
Turntable is located at the home position of the circular arc.
4. near field test system as claimed in claim 1, it is characterised in that the test antenna is in circular arrangement, described
Turntable is located at the home position of the annulus.
5. the near field test system as described in any in claim 3 or 4, it is characterised in that the Antenna support structure also wraps
Include a circumferentially rotated rotating mechanism of control test antenna.
6. near field test system as claimed in claim 5, it is characterised in that the Antenna support structure is circumferentially rotated
Angle be less than or equal to the adjacent test antenna away from turntable same distance differential seat angle maximum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720343250.4U CN206876773U (en) | 2017-04-02 | 2017-04-02 | A kind of near field test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720343250.4U CN206876773U (en) | 2017-04-02 | 2017-04-02 | A kind of near field test system |
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| Publication Number | Publication Date |
|---|---|
| CN206876773U true CN206876773U (en) | 2018-01-12 |
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ID=61342657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720343250.4U Active CN206876773U (en) | 2017-04-02 | 2017-04-02 | A kind of near field test system |
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| CN (1) | CN206876773U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872801A (en) * | 2017-04-02 | 2017-06-20 | 深圳市通用测试系统有限公司 | A kind of near field test system |
| TWI738123B (en) * | 2018-11-27 | 2021-09-01 | 日商森田科技股份有限公司 | Test device for communication equipment |
| CN114070428A (en) * | 2022-01-11 | 2022-02-18 | 中国信息通信研究院 | Method and system for testing active performance of finished automobile antenna |
-
2017
- 2017-04-02 CN CN201720343250.4U patent/CN206876773U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872801A (en) * | 2017-04-02 | 2017-06-20 | 深圳市通用测试系统有限公司 | A kind of near field test system |
| CN106872801B (en) * | 2017-04-02 | 2024-04-30 | 深圳市通用测试系统有限公司 | Near field test system |
| TWI738123B (en) * | 2018-11-27 | 2021-09-01 | 日商森田科技股份有限公司 | Test device for communication equipment |
| CN114070428A (en) * | 2022-01-11 | 2022-02-18 | 中国信息通信研究院 | Method and system for testing active performance of finished automobile antenna |
| CN114070428B (en) * | 2022-01-11 | 2022-03-29 | 中国信息通信研究院 | Method and system for testing active performance of finished automobile antenna |
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