An antenna test positioning device

Abstract

The application discloses an antenna test positioning device, which comprises a rotating table, a first quick-change assembly, a second quick-change assembly and a positioning assembly. The rotating table comprises a rotating shaft rotatably connected to a mounting table. The first quick-change assembly is fixedly connected to one end of the rotating shaft. The second quick-change assembly is used for detachably connecting an antenna with a universal interface and clamping the first quick-change assembly. The positioning assembly is arranged at the other end of the rotating shaft and is used for limiting the rotation of the rotating shaft. In the application, the second quick-change assembly can be fixed on the antenna outside a microwave darkroom in advance. Inside the microwave darkroom, the antenna can be installed by only clamping the second quick-change assembly on the first quick-change assembly. This is beneficial to quickly assembling and disassembling the antenna in the microwave darkroom, thereby reducing the test environment building time and being beneficial to quickly completing the test of a large number of antennas.

Description

Technical Field

[0001] This invention belongs to the field of microwave communication antenna testing technology, and particularly relates to an antenna testing and positioning device. Background Technology

[0002] Currently, after each phased array antenna is assembled, multiple performance indicators are tested, including beam scanning range, EIRP value, transmit power, pointing accuracy, and beam null. When testing beam scanning range, EIRP value, and pointing accuracy, antenna pattern testing is often required. The antenna pattern refers to the graph showing the relative field strength of the radiated field as a function of direction at a certain distance from the antenna. It is usually identified by two mutually perpendicular planar patterns along the antenna's maximum radiation direction, generally including a planar pattern and a vertical pattern. Furthermore, antenna testing is typically conducted in a microwave anechoic chamber, and the vertical pattern of the antenna beam pointing is measured using a "star-shaped" profile. Therefore, during pattern testing, the antenna needs to be placed on a positioning device to rotate it along its array surface normal axis. The basic accuracy requirements for the positioning device are: rotational positioning accuracy ≤ 0.5°, and axis centering accuracy ≤ 1mm.

[0003] However, the shape and mounting interfaces of phased array antennas are mostly highly customized, with inconsistent interfaces. Therefore, existing positioning devices generally require corresponding installation designs based on the specific interface type of the antenna. These devices lack universal design considerations, resulting in poor versatility and hindering cost control and standardized testing methods. Furthermore, during testing, each antenna requires screws to be installed at the positioning device for assembly and disassembly, leading to lengthy test environment setup times. In conclusion, existing positioning devices are ill-suited for the demands of mass antenna production and rapid testing, wasting limited anechoic chamber testing resources. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides an antenna testing and positioning device that can be quickly assembled and disassembled in a microwave anechoic chamber.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] An antenna testing and positioning device, comprising:

[0007] A turntable, comprising a rotating shaft rotatably connected to a mounting platform;

[0008] The first quick-change assembly is fixedly connected to one end of the rotating shaft;

[0009] The second quick-switch assembly is used for detachable connection of an antenna with a universal interface and for snapping onto the first quick-switch assembly;

[0010] A positioning component is located at the other end of the rotating shaft and is used to limit the rotation of the rotating shaft.

[0011] In one embodiment, the first quick-change assembly includes a dial and a chuck, the axes of which coincide with the axis of the rotating shaft. The dial is fixedly connected to the rotating shaft, and the chuck is rotatably connected to the end of the dial away from the rotating shaft. The dial is provided with a limit block and several positioning holes, and the chuck is provided with a first limiting through groove and several second limiting through grooves extending circumferentially. The limit block is slidably connected in the first limiting through groove, and the two ends of the second limiting through groove are respectively provided with a first hole and a second hole. The diameter of the first hole matches the diameter of the positioning holes, and the diameter of the first hole is larger than the width of the second limiting through groove. The diameter of the second hole matches the width of the second limiting through groove. When the limit block slides to the two ends of the first limiting through groove, the axis of the positioning hole coincides with the axis of the first hole and the axis of the second hole, respectively.

[0012] The second quick-change assembly includes a mounting flange with several positioning posts. Each positioning post has an end and a neck. The diameter of the end matches the diameter of the positioning hole, and the diameter of the neck is not greater than the width of the second limiting through groove. The end passes through the first hole and is positioned and connected in the positioning hole.

[0013] The beneficial effects of the above technical solution are as follows: Rotating the chuck allows the limiting block to slide to one end of the first limiting through groove, so that the axes of the several positioning holes coincide with the axes of the several first holes, thereby facilitating the ends of the several positioning pins to pass through the first holes and fit into the positioning holes. Rotating the chuck in the opposite direction allows the limiting block to slide to the other end of the first limiting through groove, so that the necks of the several positioning pins slide into the second limiting through groove, thereby preventing the positioning pins from being removed from the positioning holes, and thus quickly constraining the second quick-change assembly and its antenna onto the first quick-change assembly. Rotating the chuck again allows the limiting block to slide to one end of the first limiting through groove, so that the axes of the several positioning holes coincide with the axes of the several first holes, thereby facilitating the removal of the ends of the several positioning pins from the positioning holes after passing through the first holes, and thus facilitating the removal of the second quick-change assembly and its antenna from the first quick-change assembly.

[0014] In one embodiment, the first quick-change assembly includes a retaining ring detachably connected to the dial, a chuck rotatably connected to the retaining ring, and the chuck being located between the retaining ring and the dial.

[0015] The beneficial effects of adopting the above technical solution are: the retaining ring can restrict the axial position of the chuck and allow the chuck to rotate relative to the dial.

[0016] In one embodiment, the mounting flange is provided with mounting holes for detachable connection to a universal interface.

[0017] The beneficial effect of adopting the above technical solution is that the mounting flange can be detachably connected to the universal interface on the antenna through the mounting hole.

[0018] In one embodiment, a plurality of positioning holes are evenly arranged circumferentially on the dial, a plurality of second limiting through slots are evenly arranged circumferentially on the chuck, and a plurality of positioning pins are evenly arranged circumferentially on the mounting flange.

[0019] The beneficial effects of adopting the above technical solution are as follows: a number of positioning holes are evenly arranged on the dial along the circumference, a number of second limiting through slots are evenly arranged on the chuck along the circumference, and a number of positioning pins are evenly arranged on the mounting flange along the circumference, so that the force between the first quick-change assembly and the second quick-change assembly is more uniform.

[0020] In one embodiment, the turntable includes a base fixedly connected to a mounting platform and bearings mounted at both ends of the base. The base and bearings are covered with bearing covers, and a first end cover and a second end cover are respectively connected to the two ends of the base and bearing covers. The rotating shaft passes through the first end cover, the bearings and the second end cover.

[0021] The beneficial effects of adopting the above technical solution are as follows: the rotating shaft is rotatably connected to the base through the bearings at both ends, and then rotatably connected to the mounting platform.

[0022] In one embodiment, a scale pointer pointing to the center of the scale on the dial is fixedly connected to the base or bearing cover.

[0023] The beneficial effects of adopting the above technical solution are as follows: the scale is set with scale lines on the circumference of the dial, and the rotation angle of the antenna can be easily read through the scale line pointed to by the scale pointer.

[0024] In one embodiment, the positioning assembly includes a pressure plate sleeved on a rotating shaft, a stop pad fixedly connected to the pressure plate, and a guide cylinder sleeved on a second end cover. The stop pad is located between the pressure plate and the rotating shaft. A plurality of positioning pins are evenly arranged circumferentially on the outer side of the pressure plate. A plurality of grooves are evenly arranged circumferentially on the second end cover. A plurality of guide slots are evenly arranged circumferentially on the guide cylinder. The positioning pins pass through the grooves and are slidably connected in the guide slots. The guide slots include a first guide portion, a second guide portion, and a third guide portion. The first guide portion and the third guide portion are both arranged circumferentially on the guide cylinder. The distance between the first guide portion and the first quick-change assembly is smaller than the distance between the third guide portion and the first quick-change assembly. The two ends of the second guide portion are respectively connected to one end of the first guide portion and one end of the third guide portion.

[0025] The beneficial effects of adopting the above technical solution are as follows: rotating the guide cylinder allows the positioning pin on the outside of the pressure plate to slide along the guide groove, thereby causing the pressure plate to move axially, and thus causing the stop pad on the pressure plate to move closer to or away from the rotating shaft; wherein, when the stop pad moves closer to and presses against the rotating shaft, the rotating shaft can be stopped from rotating.

[0026] In one embodiment, the size and position of the groove are matched with the size and position of the guide channel, respectively.

[0027] The beneficial effects of adopting the above technical solution are: the size and position of the groove body are matched with the size and position of the guide groove, so as to avoid the groove body interfering with the movement of the positioning pin.

[0028] In one embodiment, the positioning component, the rotating shaft, the first quick-change component, and the second quick-change component are all hollow, and their interiors are connected sequentially.

[0029] The beneficial effects of adopting the above technical solution are as follows: the antenna's tubing can pass through the interior of the second quick-change assembly, the first quick-change assembly, the rotating shaft, and the positioning assembly to prevent the antenna's tubing and cables from getting tangled when the rotating shaft rotates.

[0030] The beneficial effects of this invention are as follows:

[0031] The second quick-connect component can be pre-fixed to the antenna outside the microwave anechoic chamber. That is, the antenna can be installed simply by snapping the second quick-connect component onto the first quick-connect component inside the microwave anechoic chamber. This facilitates the rapid assembly and disassembly of the antenna in the microwave anechoic chamber, thereby reducing the test environment setup time and enabling the rapid testing of a large number of antennas. In addition, the antennas all use a universal interface to connect to the second quick-connect component, which improves versatility, thereby helping to control development costs and standardize testing methods. Attached Figure Description

[0032] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0033] Figure 1 An installation diagram of the present invention is shown;

[0034] Figure 2 A schematic diagram of the structure of the present invention is shown;

[0035] Figure 3 The diagram shows the structure of the first quick-change assembly and the second quick-change assembly in this invention;

[0036] Figure 4 A schematic diagram of the structure at the turntable in this invention is shown;

[0037] Figure 5 A cross-sectional view of the turntable in this invention is shown;

[0038] Figure 6 A cross-sectional view of the positioning component in this invention is shown;

[0039] Figure 7 A schematic diagram of the positioning component in this invention is shown;

[0040] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0041] Figure label:

[0042] 100-Mounting platform, 200-Turntable, 210-Rotating shaft, 220-Base, 230-Bearing cover, 240-Bearing, 250-First end cover, 260-Second end cover, 261-Gate, 270-Scale pointer, 280-Turntable, 300-First quick-change assembly, 310-Scale dial, 311-Positioning hole, 312-Limit block, 320-Chuck, 321-Second limit slot, 322-First limit slot, 330-Fixing ring, 400-Second quick-change assembly, 410-Mounting flange, 420-Mounting hole, 430-Positioning post, 500-Antenna, 600-Positioning assembly, 610-Pressure plate, 620-Stop pad, 630-Positioning pin, 640-Guide cylinder, 641-Guide slot, 700-Pipeline. Detailed Implementation

[0043] The invention will now be further described with reference to the accompanying drawings.

[0044] The existing antenna positioning device design is generally as follows: the antenna is installed on the positioning device using a conventional screw-on method; the positioning device is a one-dimensional rotating mechanism with the antenna array normal as the axis, the rotating mechanism is supported by a small-diameter rolling bearing, the rotating mechanism is designed with an indexing disk, and after the indexing disk rotates to the required position, the disk is fixed by a positioning pin or bolt rod; the antenna cable or conduit runs along the rotating mechanism of the positioning device to the fixed point of the positioning device to connect with the antenna test equipment, or the cable and conduit are directly connected to the antenna test equipment.

[0045] Therefore, existing antenna positioning devices require lengthy setup times during testing because each antenna needs to have its mounting screws disassembled and reassembled. The positioning pins on the indexing disc can only position at fixed angles, making the positioning method inflexible. Furthermore, during installation, gaps between the positioning pins and the pin holes can cause the rotating mechanism to wobble, resulting in inaccurate positioning. If a bolt-rod solution is used, the bolt-rod is tightened via a handle, and the tightening torque is arbitrary, posing a risk of unreliable locking. In addition, antenna cables and conduits are prone to tangling during testing, affecting testing efficiency.

[0046] This invention provides an antenna testing and positioning device, such as... Figure 1 As shown, it includes:

[0047] Turntable 200, turntable 200 includes a rotating shaft 210 rotatably connected to mounting platform 100;

[0048] The first quick-change assembly 300 is fixedly connected to one end of the rotating shaft 210;

[0049] The second quick-switch assembly 400 is used for detachable connection of the antenna 500 with a universal interface and for snap-fitting the first quick-switch assembly 300.

[0050] Positioning component 600 is disposed at the other end of rotating shaft 210 and is used to limit the rotation of rotating shaft 210.

[0051] Understandably, the second quick-switch assembly 400 can be pre-fixed to the antenna 500 outside the microwave anechoic chamber. That is, the antenna 500 can be installed simply by snapping the second quick-switch assembly 400 onto the first quick-switch assembly 300 inside the microwave anechoic chamber. This facilitates the rapid assembly and disassembly of the antenna 500 in the microwave anechoic chamber, thereby reducing the test environment setup time and enabling the rapid completion of mass testing of antennas 500. In addition, all antennas 500 use a universal interface to connect to the second quick-switch assembly 400, which improves versatility, thereby helping to control development costs and standardize testing methods.

[0052] It should be noted that the mounting platform 100 can be a truss, which can raise the installation height of the antenna test positioning device. The height of the mounting platform 100 can be determined according to specific requirements.

[0053] In one embodiment, such as Figure 2 and Figure 3 As shown, the first quick-change assembly 300 includes a dial 310 and a chuck 320. The axes of both the dial 310 and the chuck 320 coincide with the axis of the rotating shaft 210. The dial 310 is fixedly connected to the rotating shaft 210, and the chuck 320 is rotatably connected to the end of the dial 310 away from the rotating shaft 210. The dial 310 is provided with a limit block 312 and several positioning holes 311. The chuck 320 is provided with a first limiting through groove 322 extending circumferentially and several second limiting through grooves 321. The 312 is slidably connected in the first limiting groove 322. The two ends of the second limiting groove 321 are respectively provided with a first hole and a second hole. The diameter of the first hole matches the diameter of the positioning hole 311. The diameter of the first hole is larger than the width of the second limiting groove 321. The diameter of the second hole matches the width of the second limiting groove 321. When the limiting block 312 slides to both ends of the first limiting groove 322, the axis of the positioning hole 311 coincides with the axis of the first hole and the axis of the second hole, respectively.

[0054] The second quick-change assembly 400 includes a mounting flange 410, on which a plurality of positioning posts 430 are provided. Each positioning post 430 has an end and a neck. The diameter of the end matches the diameter of the positioning hole 311, and the diameter of the neck is not greater than the width of the second limiting through groove 321. The end passes through the first hole and is positioned and connected in the positioning hole 311.

[0055] Understandably, rotating the chuck 320 allows the limiting block 312 to slide to one end of the first limiting groove 322, so that the axes of the plurality of positioning holes 311 coincide with the axes of the plurality of first holes, thereby facilitating the ends of the plurality of positioning pins 430 to pass through the first holes and fit into the positioning holes 311. Then, rotating the chuck 320 in the opposite direction allows the limiting block 312 to slide to the other end of the first limiting groove 322, so that the necks of the plurality of positioning pins 430 slide into the second limiting groove 321, thus preventing the positioning pins 430 from being removed from the positioning holes 311, thereby quickly constraining the second quick-change assembly 400 and its antenna 500 onto the first quick-change assembly 300; then rotating the chuck 320 again... 20, the limiting block 312 can slide to one end of the first limiting through groove 322, so that the axes of the plurality of positioning holes 311 respectively coincide with the axes of the plurality of first holes, thereby facilitating the removal of the ends of the plurality of positioning posts 430 from the positioning holes 311 after passing through the first holes, which in turn facilitates the removal of the second quick-change assembly 400 and the antenna 500 on it from the first quick-change assembly 300; in summary, the first quick-change assembly 300 and the second quick-change assembly 400 have simple structures, and the first quick-change assembly 300 and the second quick-change assembly 400 can be quickly connected or separated, which helps to save the installation time of the antenna 500, so as to facilitate the rapid completion of the testing of a large number of antennas 500.

[0056] It should be noted that, in order to facilitate the rotation of the rotating shaft 210, a turntable 280 can be fixedly connected to the end of the rotating shaft 210 away from the first quick-change assembly 300; in order to facilitate the rotation of the chuck 320, an outwardly extending handle can be provided on the side of the chuck 320.

[0057] It should also be noted that the length of the end of the positioning post 430 can be matched with the depth of the positioning hole 311, so as to facilitate the restriction of the axial movement of the positioning post 430 by the chuck 320.

[0058] In one embodiment, the first quick-change assembly 300 includes a retaining ring 330 detachably connected to the dial 310, a chuck 320 rotatably connected to the retaining ring 330, and the chuck 320 is located between the retaining ring 330 and the dial 310.

[0059] Understandably, the retaining ring 330 can restrict the axial position of the chuck 320 and allow the chuck 320 to rotate relative to the dial 310.

[0060] It should be noted that an appropriate axial gap can be reserved between the retaining ring 330 and the dial 310 to prevent the chuck 320 from rotating with the retaining ring 330 and the dial 310.

[0061] It should also be noted that the outer diameter of the retaining ring 330 can match the diameter of the center hole of the mounting flange 410, so as to facilitate the radial limiting of the mounting flange 410 by the retaining ring 330. That is, afterward, it is only necessary to rotate the mounting flange 410 to align the positioning pin 430 with the first hole and the positioning hole 311.

[0062] In one embodiment, the mounting flange 410 is provided with mounting holes 420 for detachable connection to a universal interface.

[0063] Understandably, the mounting flange 410 can be detachably connected to the universal interface on the antenna 500 via the mounting hole 420.

[0064] It should be noted that the universal interface on mounting hole 420 and antenna 500 can be connected by bolts.

[0065] In one embodiment, a plurality of positioning holes 311 are evenly arranged circumferentially on the dial 310, a plurality of second limiting through grooves 321 are evenly arranged circumferentially on the chuck 320, and a plurality of positioning pins 430 are evenly arranged circumferentially on the mounting flange 410.

[0066] It is understandable that a number of positioning holes 311 are evenly arranged circumferentially on the dial 310, a number of second limiting through slots 321 are evenly arranged circumferentially on the chuck 320, and a number of positioning pins 430 are evenly arranged circumferentially on the mounting flange 410, so as to make the force between the first quick-change assembly 300 and the second quick-change assembly 400 more uniform.

[0067] In one embodiment, such as Figure 4 and Figure 5 As shown, the turntable 200 includes a base 220 fixedly connected to the mounting platform 100 and bearings 240 installed at both ends of the base 220. The base 220 and bearings 240 are covered with bearing covers 230. The two ends of the base 220 and bearing covers 230 are respectively connected to a first end cover 250 and a second end cover 260. The rotating shaft 210 passes through the first end cover 250, the bearings 240 and the second end cover 260.

[0068] Understandably, the rotating shaft 210 is rotatably connected to the base 220 via bearings 240 at both ends, and then rotatably connected to the mounting platform 100.

[0069] It should be noted that the bearings 240 at both ends of the rotating shaft 210 should be of the same model.

[0070] In one embodiment, a scale pointer 270 pointing to the center of the scale on the dial 310 is fixedly connected to the base 220 or the bearing cover 230.

[0071] Understandably, the dial 310 has scale lines on its circumference, and the rotation angle of the antenna 500 can be easily read by the scale line pointed to by the scale pointer 270.

[0072] It should be noted that the scale line is marked every 1° around the dial 310, and the tip of the scale pointer 270 is 1mm away from the dial 310.

[0073] In one embodiment, such as Figure 6 and Figure 7 As shown, the positioning assembly 600 includes a pressure plate 610 sleeved on the rotating shaft 210, a stop pad 620 fixedly connected to the pressure plate 610, and a guide cylinder 640 sleeved on the second end cover 260. The stop pad 620 is located between the pressure plate 610 and the rotating shaft 210. Several positioning pins 630 are evenly arranged circumferentially on the outer side of the pressure plate 610. Several grooves 261 are evenly arranged circumferentially on the second end cover 260. Several guide slots 641 are evenly arranged circumferentially on the guide cylinder 640. The positioning pins 630 pass through the grooves 261 and are slidably connected in the guide slots 641. The guide slots 641 include a first guide portion, a second guide portion, and a third guide portion. The first guide portion and the third guide portion are both arranged circumferentially on the guide cylinder 640. The distance between the first guide portion and the first quick-change assembly 300 is smaller than the distance between the third guide portion and the first quick-change assembly 300. The two ends of the second guide portion are respectively connected to one end of the first guide portion and one end of the third guide portion.

[0074] It is understandable that rotating the guide cylinder 640 allows the positioning pin 630 on the outside of the pressure plate 610 to slide along the guide groove 641, thereby causing the pressure plate 610 to move axially, and thus causing the stop pad 620 on the pressure plate 610 to move closer to or away from the rotating shaft 210; wherein, when the stop pad 620 moves closer to and presses against the rotating shaft 210, the rotating shaft 210 can be stopped from rotating.

[0075] It should be noted that a handle may also be provided on the outside of the guide cylinder 640 to facilitate rotation of the guide cylinder 640.

[0076] In one embodiment, the size and position of the groove 261 are matched with the size and position of the guide groove 641, respectively.

[0077] Understandably, the size and position of the groove 261 are matched with the size and position of the guide groove 641 to avoid the groove 261 interfering with the movement of the locating pin 630.

[0078] In one embodiment, the positioning component 600, the rotating shaft 210, the first quick-change component 300, and the second quick-change component 400 are all hollow, and their interiors are connected sequentially.

[0079] Understandably, the conduit 700 of the antenna 500 can pass through the interior of the second quick-switch assembly 400, the first quick-switch assembly 300, the rotating shaft 210, and the positioning assembly 600, and then connect to a liquid cooling source or antenna electrical performance testing instrument fixed to the ground. This is to prevent the conduit and cable of the antenna 500 from getting tangled when the rotating shaft 210 rotates, thereby avoiding wear or breakage of the conduit and cable connection after being pulled, and thus providing reliability for the antenna 500 test connection.

[0080] It should be noted that the rotating shaft 210 relies on the large-diameter hole at its center and the bearings 240 with a large span at both ends for support, thereby increasing its rigidity, reducing the deformation of the antenna 500, and improving the installation accuracy of the antenna 500. At the same time, it can also significantly increase the maximum load weight of the antenna test and positioning device, so that the antenna test and positioning device can be compatible with more antennas 500, improving the versatility of the antenna test and positioning device, thereby reducing the types of positioning devices and reducing testing costs.

[0081] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0082] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. An antenna testing and positioning device, characterized in that, include: A turntable (200) includes a rotating shaft (210) rotatably connected to a mounting platform (100). A first quick-change assembly (300) is fixedly connected to one end of the rotating shaft (210); The second quick-switch assembly (400) is used for detachably connecting an antenna (500) with a universal interface and for snapping onto the first quick-switch assembly (300). A positioning component (600) is disposed at the other end of the rotating shaft (210), and the positioning component (600) is used to restrict the rotation of the rotating shaft (210); The first quick-change assembly (300) includes a dial (310) and a chuck (320). The axes of the dial (310) and the chuck (320) coincide with the axis of the rotating shaft (210). The dial (310) is fixedly connected to the rotating shaft (210), and the chuck (320) is rotatably connected to the end of the dial (310) away from the rotating shaft (210). The dial (310) is provided with a limit block (312) and a plurality of positioning holes (311), and the chuck (320) is provided with a first limiting through groove (322) extending circumferentially and a plurality of second limiting through grooves (321). The limiting block (312) is slidably connected in the first limiting through groove (322). The two ends of the second limiting through groove (321) are respectively provided with a first hole and a second hole. The diameter of the first hole matches the diameter of the positioning hole (311). The diameter of the first hole is larger than the width of the second limiting through groove (321). The diameter of the second hole matches the width of the second limiting through groove (321). When the limiting block (312) slides to both ends of the first limiting through groove (322), the axis of the positioning hole (311) coincides with the axis of the first hole and the axis of the second hole, respectively. The second quick-change assembly (400) includes a mounting flange (410), on which a plurality of positioning posts (430) are provided. Each positioning post (430) has an end and a neck. The diameter of the end matches the diameter of the positioning hole (311), and the diameter of the neck is not greater than the width of the second limiting through groove (321). The end passes through the first hole and is positioned and connected in the positioning hole (311).

2. The antenna testing and positioning device according to claim 1, characterized in that, The first quick-change assembly (300) includes a retaining ring (330) detachably connected to the dial (310), and a chuck (320) rotatably connected to the retaining ring (330), the chuck (320) being located between the retaining ring (330) and the dial (310).

3. The antenna testing and positioning device according to claim 1, characterized in that, The mounting flange (410) is provided with mounting holes (420) for detachable connection of the universal interface.

4. The antenna testing and positioning device according to claim 1, characterized in that, A plurality of positioning holes (311) are evenly arranged circumferentially on the dial (310), a plurality of second limiting through grooves (321) are evenly arranged circumferentially on the chuck (320), and a plurality of positioning pins (430) are evenly arranged circumferentially on the mounting flange (410).

5. The antenna testing and positioning device according to claim 1, characterized in that, The turntable (200) includes a base (220) fixedly connected to the mounting platform (100) and bearings (240) installed at both ends of the base (220). The base (220) and the bearings (240) are covered with bearing covers (230). The two ends of the base (220) and the bearing covers (230) are respectively connected to a first end cover (250) and a second end cover (260). The rotating shaft (210) passes through the first end cover (250), the bearings (240) and the second end cover (260).

6. The antenna testing and positioning device according to claim 5, characterized in that, A scale pointer (270) pointing to the center of the scale on the dial (310) is fixedly connected to the base (220) or the bearing cover (230).

7. The antenna testing and positioning device according to claim 5, characterized in that, The positioning assembly (600) includes a pressure plate (610) sleeved on the rotating shaft (210), a stop pad (620) fixedly connected to the pressure plate (610), and a guide cylinder (640) sleeved on the second end cover (260). The stop pad (620) is located between the pressure plate (610) and the rotating shaft (210). A plurality of positioning pins (630) are evenly arranged circumferentially on the outer side of the pressure plate (610). A plurality of grooves (261) are evenly arranged circumferentially on the second end cover (260). A plurality of guide cylinders (640) are evenly arranged circumferentially on the guide cylinder (640). The guide groove (641) is slidably connected to the guide groove (641) after the positioning pin (630) passes through the groove body (261); the guide groove (641) includes a first guide part, a second guide part and a third guide part, the first guide part and the third guide part are both arranged circumferentially on the guide cylinder (640), the distance between the first guide part and the first quick-change assembly (300) is less than the distance between the third guide part and the first quick-change assembly (300), and the two ends of the second guide part are respectively connected to one end of the first guide part and one end of the third guide part.

8. The antenna testing and positioning device according to claim 7, characterized in that, The dimensions and position of the groove (261) are respectively matched with the dimensions and position of the guide groove (641).

9. The antenna testing and positioning device according to claim 1, characterized in that, The positioning component (600), the rotating shaft (210), the first quick-change component (300), and the second quick-change component (400) are all hollow, and their interiors are connected sequentially.

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