An antenna near-field test device

Abstract

The present invention relates to the field of antenna near-field testing, and discloses an antenna near-field testing device, including a testing mechanism. The testing mechanism includes a horizontal bracket, a second cantilever is arranged on one side of the horizontal bracket, a supporting column is arranged at the end of the second cantilever, a column bracket is installed on the horizontal bracket, a first cantilever is installed on the column bracket, a fixing ring is arranged at the end of the first cantilever, the axis line of the fixing ring is arranged vertically, and during the process of the column bracket moving together with the first cantilever, the axis line of the fixing ring can coincide with the axis line of the supporting column. A rotating ring is coaxially sleeved in the fixing ring, a track is arranged on the upper end surface of the rotating ring, the track includes two vertical segments arranged vertically and respectively on both sides of the axis line of the rotating ring and an arc segment arranged between the upper ends of the two vertical segments, the axis line of the arc segment intersects with the axis line of the fixing ring, and a probe is installed on the track, and the probe can move on the track.

Description

Technical Field

[0001] The present invention relates to the field of antenna testing, and more particularly to the field of antenna near-field testing. Background Art

[0002] Antenna near-field testing is one of the antenna testing methods. It can collect the amplitude and phase data of the antenna at a relatively short distance and convert it into far-field characteristics through mathematical algorithms, reducing the requirements for large sites. It has the advantages of indoor measurement, all-weather operation, avoiding errors caused by distance, and ensuring the accuracy and repeatability of test results. There are three common antenna near-field testing methods: planar scanning method, cylindrical scanning method, and spherical scanning method. When in use, select the appropriate testing method according to the type of antenna to be tested. For example, in the fields of satellite communication, radar detection, etc., the spherical scanning method is preferred; in the fields of mobile base station antennas, etc., the cylindrical scanning method is preferred; in the fields of butterfly antennas, phased array antennas, etc., the planar scanning method is preferred. Therefore, in the test center, generally three testing devices need to be set up to test different types of antennas, and the cost is relatively high. In addition, when using the spherical scanning method, it is necessary to ensure that the center of the antenna to be tested is placed as close as possible to the center point of the spherical near-field to achieve the best test effect. However, the sizes of different antennas are different, and it is difficult to be at the center point of the spherical near-field. When using the cylindrical or planar scanning method, it is necessary to move the probe at various points on the cylinder or plane, and the test efficiency is relatively low.

[0003] Based on the above, the present invention proposes an antenna near-field testing device, which can improve the test effect or test efficiency of planar or cylindrical or spherical scanning testing while being able to perform planar or cylindrical or spherical scanning testing on the antenna. Summary of the Invention

[0004] To solve the problems mentioned in the above background, the present invention provides an antenna near-field testing device.

[0005] To achieve the above technical objectives, the technical solutions adopted by the present invention are as follows.

[0006] An antenna near-field testing device includes a testing mechanism. The testing mechanism includes a horizontal support. A second cantilever arranged horizontally is provided on one side of the horizontal support. A supporting column arranged vertically is provided at the end of the second cantilever. The upper end of the supporting column is used to place the antenna to be tested.

[0007] A column support is installed on the horizontal support. The moving direction of the column support is horizontally arranged and perpendicular to the extending direction of the second cantilever. A first cantilever is installed on the column support. The moving direction of the first cantilever is vertically arranged. A fixing ring is provided at the end of the first cantilever. The axis line of the fixing ring is vertically arranged. And during the process that the column support moves together with the first cantilever, the axis line of the fixing ring can coincide with the axis line of the supporting column. A rotating ring is coaxially sleeved inside the fixing ring. A track is provided on the upper end surface of the rotating ring.

[0008] The track includes two vertical segments that are vertically arranged and located on both sides of the axis line of the rotating ring respectively, and an arc segment provided between the upper ends of the two vertical segments. The axis line of the arc segment intersects with the axis line of the fixing ring. A probe is installed on the track, and the probe can move on the track.

[0009] As a further improvement and optimization of the present invention, a second linear module for driving the column support to move is provided on the horizontal support. A third linear module for driving the first cantilever to move is provided on the column support. A first motor for driving the rotating ring to rotate is provided on the first cantilever.

[0010] As a further improvement and optimization of the present invention, a rack is provided on the track. The shape of the rack is the same as that of the track and the sizes of both are scaled proportionally.

[0011] There is a connecting support outside the track. A floating support is slidably installed inside the connecting support. The relative sliding direction between the floating support and the connecting support is perpendicular to the extending direction of the track.

[0012] The floating support is located outside the track. A roller is provided on the floating support. The axis line of the roller is parallel to the axis line of the arc segment of the track, and the roller is tangent to the outer surface of the track.

[0013] A gear is provided on the connecting support. The gear meshes with the rack. A second motor for driving the gear to rotate is provided on the connecting support.

[0014] As a further improvement and optimization of the present invention, a spring is provided between the connecting support and the floating support. The elastic force of the spring is used to make the roller and the gear approach each other.

[0015] As a further improvement and optimization of the present invention, two rollers are provided.

[0016] As a further improvement and optimization of the present invention, two floating supports are provided, and the two rollers are respectively provided on the two floating supports.

[0017] As a further improvement and optimization of the present invention, a connecting rod is installed on the connecting bracket. The extending direction of the connecting rod is perpendicular to the extending direction of the track. The connecting rod can move along the extending direction. A first telescopic rod for driving the connecting rod to move is arranged on the connecting bracket. One end of the connecting rod is connected to the probe, and the probe is located inside the track.

[0018] As a further improvement and optimization of the present invention, it further includes a shielding component, which is used to change the shielding coefficient of the area between the track and the supporting column.

[0019] As a further improvement and optimization of the present invention, the shielding component includes a shielding body, a second telescopic rod for driving the shielding body to move, and a first linear module for driving the horizontal bracket to move. The moving direction of the horizontal bracket is parallel to the extending direction of the second cantilever, and the moving direction of the shielding body is parallel to the moving direction of the column bracket. The inside of the shielding body is hollow, and an input pipe and an output pipe are arranged on the outer surface of the shielding body. A number of inlets are arranged in an array on the input pipe, and a number of outlets are arranged in an array on the output pipe. Solenoid valves are arranged at each inlet and each outlet.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] In summary, it can be seen that with this solution, an antenna can be tested by a single testing device in a scanning manner of plane, cylinder or sphere, with lower cost. In addition, during the testing process: a. During spherical testing, according to the known size of the antenna to be tested, the distance parameter between the antenna center and the spherical near-field center point can be obtained. Then, according to the distance parameter, through the cooperation of the second linear module and the third linear module, the position of the track is changed to make the spherical near-field center point coincide with the antenna center to be tested, thus greatly improving the effect of spherical scanning testing; b. During plane and cylinder scanning testing, since the reciprocating movement direction of the probe on the vertical section of the track is the same as the reciprocating movement direction of the first cantilever driven by the third linear module. Therefore, on the one hand, the moving speed of the probe is equal to the sum of the speed of the probe itself and the speed of the first cantilever, so the testing efficiency is significantly improved. On the other hand, the moving range of the probe in the vertical direction is larger than that of the prior art, so the testing effect is better.

[0022] That is, this solution can not only combine the three scanning methods of plane, cylinder and sphere to reduce costs, but also the three scanning methods promote each other, achieving the purpose of improving the testing effect or testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Structural schematic of the present invention Figure 1 ;

[0024] Figure 2 Structural schematic of the present inventionFigure 2 ;

[0025] Figure 3 is a schematic structure of the present invention Figure 3 ;

[0026] Figure 4 is a schematic structural diagram of the test mechanism;

[0027] Figure 5 is a partial schematic of the test mechanism Figure 1 ;

[0028] Figure 6 is a partial schematic of the test mechanism Figure 2 ;

[0029] Figure 7 is a partial schematic of the test mechanism Figure 3 ;

[0030] Figure 8 is a schematic structural diagram of the shielding component.

[0031] The reference numerals in the drawings are:

[0032] 100, test mechanism; 101, first linear module; 102, horizontal bracket; 103, second linear module; 104, column bracket; 105, third linear module; 106, first cantilever; 107, second cantilever; 108, supporting column; 109, fixing ring; 110, rotating ring; 111, first motor; 112, track; 113, rack; 114, connecting bracket; 115, suspension bracket; 116, gear; 117, roller; 118, spring; 119, second motor; 120, first telescopic rod; 121, connecting rod; 122, probe; 200, shielding component; 201, shielding body; 202, second telescopic rod; 203, input pipe; 204, output pipe. Specific Embodiments

[0033] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific embodiments, structures, features and their effects of the present invention as follows.

[0034] Embodiment 1

[0035] Referring to Figures 1-7 , an antenna near-field test device includes a test mechanism 100. The test mechanism 100 includes a horizontal bracket 102. A second cantilever 107 arranged horizontally is provided on one side of the horizontal bracket 102. A supporting column 108 arranged vertically is provided at the end of the second cantilever 107. The upper end of the supporting column 108 is used to place the antenna to be tested, and the placement method can be achieved by existing technologies and will not be elaborated here.

[0036] A vertical column support 104 and a second linear module 103 for driving the vertical column support 104 to move are installed on the horizontal support 102. The moving direction of the vertical column support 104 is horizontally arranged and perpendicular to the extending direction of the second cantilever 107.

[0037] A first cantilever 106 and a third linear module 105 for driving the first cantilever 106 to move are installed on the vertical column support 104. The moving direction of the first cantilever 106 is vertically arranged.

[0038] A fixing ring 109 is arranged at the end of the first cantilever 106. The axis line of the fixing ring 109 is vertically arranged, and during the process of the vertical column support 104 moving together with the first cantilever 106, the axis line of the fixing ring 109 can coincide with the axis line of the supporting column 108.

[0039] A rotating ring 110 is coaxially sleeved inside the fixing ring 109, and a first motor 111 for driving the rotating ring 110 to rotate is arranged on the first cantilever 106.

[0040] A track 112 is arranged on the upper end surface of the rotating ring 110. When the rotating ring 110 rotates, it will drive the track 112 to rotate together. The track 112 includes two vertical segments which are vertically arranged and located on both sides of the axis line of the rotating ring 110 respectively, and an arc segment arranged between the upper ends of the two vertical segments. The axis line of the arc segment intersects with the axis line of the fixing ring 109.

[0041] A probe 122 is installed on the track 112. The probe 122 can move on the track 112 and the probe 122 can extend and retract. The extending and retracting direction of the probe 122 is perpendicular to the extending direction of the track 112.

[0042] In the first embodiment, the antenna can be tested by using a planar or cylindrical or spherical scanning method. Specifically:

[0043] Place the antenna to be tested on the upper end of the supporting column 108. Initially, the axis line of the fixing ring 109 coincides with the axis line of the supporting column 108. According to the known size of the antenna to be tested, the distance parameter between the antenna center and the spherical near-field center point can be obtained. Then, according to the distance parameter, through the cooperation of the second linear module 103 and the third linear module 105, the position of the track 112 is changed, so that the spherical near-field center point can coincide with the center of the antenna to be tested. Finally, the first motor 111 drives the rotating ring 110 to rotate. The rotating ring 110 drives the track 112 and the probe 122 to rotate together. At the same time, the probe 122 makes a reciprocating motion on the arc segment of the track 112. The two cooperate to realize the spherical scanning test of the antenna to be tested;

[0044] Place the antenna to be tested on the upper end of the supporting column 108. Drive the rotating ring 110 to rotate through the first motor 111. The rotating ring 110 drives the track 112 and the probe 122 to rotate together. At the same time, the probe 122 reciprocates on the vertical section of the track 112. At the same time, the third linear module 105 drives the first cantilever 106 to reciprocate in the vertical direction. The first cantilever 106 drives the probe 122 to move together, and the moving direction of the first cantilever 106 is the same as the moving direction of the probe 122 on the vertical section. The three cooperate to realize the cylindrical surface scanning test of the antenna to be tested;

[0045] Place the antenna to be tested on the upper end of the supporting column 108. The probe 122 reciprocates on the vertical section of the track 112. At the same time, the third linear module 105 drives the first cantilever 106 to reciprocate in the vertical direction. The first cantilever 106 drives the probe 122 to move together, and the moving direction of the first cantilever 106 is the same as the moving direction of the probe 122 on the vertical section. At the same time, the second linear module 103 drives the column support 104 to move. The column support 104 drives the probe 122 to move together. The three cooperate to realize the plane scanning test of the antenna to be tested;

[0046] In summary, it can be seen that this solution can test the antenna in a plane, cylindrical surface or spherical surface scanning mode with a single test device, and the cost is lower. In addition, during the test process: a. During the spherical surface test, according to the known size of the antenna to be tested, the distance parameter between the antenna center and the spherical near-field center point can be obtained. Then, according to the distance parameter, through the cooperation of the second linear module and the third linear module, the position of the track is changed to make the spherical near-field center point coincide with the antenna center to be tested, thus greatly improving the effect of the spherical surface scanning test; b. During the plane and cylindrical surface scanning tests, since the reciprocating movement direction of the probe on the vertical section of the track is the same as the reciprocating movement direction of the third linear module driving the first cantilever, on the one hand, the moving speed of the probe is equal to the sum of the speed of the probe itself and the speed of the first cantilever, so the test efficiency is significantly improved. On the other hand, the moving range of the probe in the vertical direction is larger than that of the prior art, so the test effect is better.

[0047] That is, this solution can not only combine the three scanning modes of plane, cylindrical surface and spherical surface to reduce the cost, but also the three scanning modes promote each other to achieve the purpose of improving the test effect or test efficiency.

[0048] Further, referring to Figures 5-7 , a rack 113 is arranged on the track 112. The shape of the rack 113 is the same as that of the track 112 and the sizes of the two are scaled in the same proportion.

[0049] There is a connection bracket 114 outside the track 112. A suspension bracket 115 is slidably installed inside the connection bracket 114. The relative sliding direction between the suspension bracket 115 and the connection bracket 114 is perpendicular to the extension direction of the track 112.

[0050] The suspension bracket 115 is located outside the track 112. There are rollers 117 provided on the suspension bracket 115. The axis line of the rollers 117 is parallel to the axis line of the arc section of the track 112. The rollers 117 are tangent to the outer surface of the track 112. There are two rollers 117.

[0051] There is a gear 116 provided on the connection bracket 114. The gear 116 meshes with the rack 113. There is a second motor 119 provided on the connection bracket 114 for driving the gear 116 to rotate.

[0052] A spring 118 is provided between the connection bracket 114 and the suspension bracket 115. The elastic force of the spring 118 is used to cause relative movement between the connection bracket 114 and the suspension bracket 115, so that the rollers 117 and the gear 116 approach each other, keeping the gear 116 meshed with the rack 113. And by driving the gear 116 to rotate through the second motor 119, the connection bracket 114 and the suspension bracket 115 can be driven to move on the track 112.

[0053] Further, there are two suspension brackets 115. The two rollers 117 are respectively provided on the two suspension brackets 115. The significance is that during the movement, there is the following situation: one roller 117 is located on the arc section of the track 112, and the other roller 117 is located on the vertical section of the track 112. In this case, if the two rollers 117 are on the same suspension bracket 115, although it does not affect the movement of the connection bracket 114 and the suspension bracket 115 on the track 112, an assembly gap needs to be reserved for the transition of the roller 117 between the arc section and the vertical section, and the movement accuracy is relatively low. On the contrary, in this solution, the two rollers 117 are respectively provided on the two suspension brackets 115. In this case, no assembly gap needs to be reserved, and the roller 117 can also complete a smooth transition between the arc section and the vertical section, with higher movement accuracy. Higher movement accuracy is more beneficial for the scanning test of the antenna.

[0054] Further, a connecting rod 121 is installed on the connection bracket 114. The extension direction of the connecting rod 121 is perpendicular to the extension direction of the track 112. The connecting rod 121 can move along the extension direction. There is a first telescopic rod 120 provided on the connection bracket 114 for driving the connecting rod 121 to move. Existing electric telescopic rod technology can be used, etc., which will not be elaborated. One end of the connecting rod 121 is connected to the probe 122. The probe 122 is located inside the track 112. The significance is that it can change the distance between the probe 122 and the antenna to be tested.

[0055] Embodiment 2

[0056] During the actual use of the antenna, there are inevitably shielding media such as buildings and trees between the antenna and the receiving device. Therefore, referring to Figure 1 and Figure 8 , this test device further includes a first linear module 101 for driving the horizontal bracket 102 to move. The moving direction of the horizontal bracket 102 is parallel to the extending direction of the second cantilever 107.

[0057] This test device further includes a shielding component 200. The shielding component 200 includes a shielding body 201 and a second telescopic rod 202 for driving the shielding body 201 to move. The moving direction of the shielding body 201 is parallel to the moving direction of the column bracket 104. The inside of the shielding body 201 is hollow. An input pipe 203 and an output pipe 204 are arranged on the outer surface of the shielding body 201. A number of inlets are arranged in an array on the input pipe 203, and a number of outlets are arranged in an array on the output pipe 204. Solenoid valves are arranged at each inlet and each outlet. The significance is that through the cooperation of multiple solenoid valves, shielding media with different shielding coefficients can be injected into the shielding body 201. Then, through the cooperation of the first linear module 101 and the second telescopic rod 202, the shielding body 201 can be located between the track 112 and the supporting column 108, so that there is a shielding medium with an adjustable shielding coefficient between the antenna and the probe 122.

[0058] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An antenna near-field test device, comprising a test mechanism (100), characterized in that: The testing mechanism (100) comprises a transverse support (102), a second cantilever (107) arranged horizontally is provided on one side of the transverse support (102), a supporting column (108) arranged vertically is provided at the end of the second cantilever (107), and the upper end of the supporting column (108) is used to place an antenna to be tested; A column support (104) is mounted on the transverse support (102), the movement direction of the column support (104) is arranged horizontally and is perpendicular to the extension direction of the second cantilever (107), a first cantilever (106) is mounted on the column support (104), the movement direction of the first cantilever (106) is arranged vertically, a fixing ring (109) is arranged at the end of the first cantilever (106), the axis of the fixing ring (109) is arranged vertically, and when the column support (104) moves with the first cantilever (106), the axis of the fixing ring (109) can coincide with the axis of the supporting column (108), a rotating ring (110) is coaxially sleeved inside the fixing ring (109), and a track (112) is arranged on the upper end surface of the rotating ring (110); The track (112) comprises two vertical sections arranged vertically and respectively located on both sides of the axis of the rotating ring (110), and an arc section arranged between the upper ends of the two vertical sections, the axis of the arc section intersecting with the axis of the fixed ring (109), and a probe (122) is installed on the track (112), and the probe (122) can move on the track (112).

2. The antenna near-field test device according to claim 1, characterized in that: The transverse support (102) is provided with a second linear module (103) for driving the column support (104) to move, the column support (104) is provided with a third linear module (105) for driving the first cantilever (106) to move, and the first cantilever (106) is provided with a first motor (111) for driving the rotating ring (110) to rotate.

3. The antenna near-field test device according to claim 1, characterized in that: A rack (113) is provided on the track (112), the shape of the rack (113) is consistent with the shape of the track (112), and the sizes of the two are scaled in the same proportion; A connecting bracket (114) is provided outside the track (112), a suspension bracket (115) is slidably mounted inside the connecting bracket (114), and a relative sliding direction between the suspension bracket (115) and the connecting bracket (114) is perpendicular to an extension direction of the track (112); The suspension bracket (115) is located outside the track (112), and a roller (117) is provided on the suspension bracket (115). The axis of the roller (117) is parallel to the axis of the arc segment of the track (112), and the roller (117) is tangent to the outer surface of the track (112); A gear (116) is provided on the connecting bracket (114), the gear (116) is meshed with the rack (113), and a second motor (119) for driving the gear (116) to rotate is provided on the connecting bracket (114).

4. The antenna near-field test device according to claim 3, characterized in that: A spring (118) is provided between the connecting bracket (114) and the suspension bracket (115), and the elastic force of the spring (118) is used to bring the roller (117) and the gear (116) closer to each other.

5. The antenna near-field test device according to claim 3, characterized in that: Two rollers (117) are provided.

6. The antenna near-field test device according to claim 5, characterized in that: Two suspension brackets (115) are provided, and the two rollers (117) are respectively provided on the two suspension brackets (115).

7. The antenna near-field test device according to claim 4, characterized in that: A connecting rod (121) is mounted on the connecting bracket (114); the extending direction of the connecting rod (121) is perpendicular to the extending direction of the track (112); the connecting rod (121) can move along the extending direction; a first telescopic rod (120) for driving the connecting rod (121) to move is disposed on the connecting bracket (114); one end of the connecting rod (121) is connected to a probe (122); and the probe (122) is located on the inner side of the track (112).

8. The antenna near-field test device according to claim 3, characterized in that: Also included is a shielding assembly (200), which is used to change the shielding coefficient of the area between the track (112) and the supporting column (108).

9. The antenna near-field test device according to claim 8, characterized in that: The shielding assembly (200) comprises a shielding body (201), a second telescopic rod (202) for driving the shielding body (201) to move, and a first linear module (101) for driving the cross support (102) to move, the movement direction of the cross support (102) being parallel to the extension direction of the second cantilever (107), the movement direction of the shielding body (201) being parallel to the movement direction of the column support (104), the interior of the shielding body (201) being hollow, an input pipe (203) and an output pipe (204) being arranged on the outer surface of the shielding body (201), a plurality of inlets being arranged in an array on the input pipe (203), a plurality of outlets being arranged in an array on the output pipe (204), and a solenoid valve being arranged at each inlet and each outlet.

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