A phase center related distance adjustable antenna product

Abstract

The application is suitable for the field of electromagnetic compatibility test device equipment, and provides an antenna product with adjustable phase center related distance, which comprises a bottom plate, the front side and the rear side of the upper surface of the bottom plate are both horizontally fixedly connected with sliding rails, the surface of the sliding rails is slidably sleeved with sliding blocks, the top of the sliding blocks is fixedly connected with sliding plates, the upper surface of the sliding plates is fixedly connected with accommodating boxes, and the surface of the accommodating boxes is provided with a driving mechanism for driving the accommodating boxes to move in the horizontal direction. The antenna product with adjustable phase center related distance moves the accommodating boxes through the driving mechanism to adjust the detection position of the antenna body, so as to accurately adjust the distance between the antenna (original phase center) and the measured object, and further provide a carrier for realizing the compensation adjustment function that the distance between the antenna phase center and the measured object is basically unchanged with the change of the working frequency.

Description

Technical Field

[0001] This invention belongs to the field of electromagnetic compatibility testing equipment, and particularly relates to an antenna product with adjustable phase center correlation distance. Background Technology

[0002] In existing technologies, electromagnetic compatibility (EMC) refers to the ability of a device or system to function normally in its electromagnetic environment without causing unacceptable electromagnetic interference to anything in that environment. Currently, the number of electronic and electrical devices (such as new energy vehicles, medical electrical equipment, and various wireless communication systems) is constantly increasing, leading to increasingly complex electromagnetic environments that may cause electromagnetic interference to communications or other devices. Simultaneously, various electromagnetic radiation sources in the environment also pose the possibility of causing electromagnetic interference to electronic and electrical devices. Therefore, ensuring that electronic and electrical devices can maintain their functions normally under various electromagnetic interference conditions, and limiting the electromagnetic interference they emit to the outside world, is a necessary condition for ensuring the normal operation and safety of electronic and electrical devices, and a necessary measure for maintaining an orderly electromagnetic environment.

[0003] In the electromagnetic compatibility (EMC) testing of electronic or electrical equipment, the antenna is the main testing device for the EMC performance of the equipment. Limit compliance determination must be performed after the EMC performance testing of the electronic or electrical equipment. However, due to uncertainties caused by various influencing factors, the measured results will only approximate the actual measured results. Among these, changes in the antenna phase center and the tolerance of the measurement distance are the main influencing factors, and the uncertainty increases with the measurement distance.

[0004] Currently, antenna detection methods mainly involve fixed detection after selecting a starting position. The lack of freedom in the antenna pointing direction limits the compensation for phase center changes and measurement distance tolerances due to hardware limitations, resulting in low test accuracy. Summary of the Invention

[0005] This invention provides an antenna product with adjustable phase center-related distance, aiming to solve the problem that during the detection process of a fixed antenna position, due to hardware limitations, the phase center change and the allowable error of the measurement distance cannot be compensated, and the uncertainty caused by these two factors will reduce the accuracy of the test results.

[0006] The present invention is implemented as follows: an antenna product with adjustable phase center correlation distance includes a base plate, on the front and rear sides of the upper surface of the base plate, a sliding rail is laterally fixedly connected, a sliding block is slidably sleeved on the surface of the sliding rail, a sliding plate is fixedly connected to the top of the sliding block, a receiving box is fixedly connected to the upper surface of the sliding plate, and a driving mechanism for driving the receiving box to move in the horizontal direction is provided on the surface of the receiving box. A protective back plate is fixedly connected to the rear side of the container. Support rods are vertically fixedly connected to both ends of the top of the protective back plate. A sliding cylinder is slidably sleeved on the surface of the support rod. A first transmission mechanism is provided in the inner cavity of the container to drive the sliding cylinder to move up and down. A transmission box is fixedly connected to the front side of the sliding cylinder. A rotating shaft is rotatably connected inside the transmission box. Both ends of the rotating shaft extend to the outside of the transmission box. An antenna body is detachably mounted on one end of the rotating shaft through a snap-fit ​​structure. A second transmission mechanism for driving the rotating shaft to rotate is provided in the inner cavity of the transmission box.

[0007] Preferably, the drive mechanism includes two support plates, two first motors, and two rack plates. The two rack plates are respectively fixedly connected to the front and rear sides of the upper surface of the base plate. The two support plates are respectively fixedly connected to the front and rear sides of one end face of the support plate. The two first motors are respectively fixedly connected to the surfaces of one and the other support plates. The output shaft of the first motor is fixedly connected to a drive gear that meshes with the rack plate on the same side.

[0008] Preferably, the first transmission mechanism includes two second motors and two second pulleys. The two second pulleys are respectively disposed at the top ends of one and the other of the support rods. The two second motors are respectively disposed at one end and the other end of the inner cavity of the receiving box. The output shaft of the second motor is fixedly connected to a transmission rod. The rear end of the transmission rod extends to the outside of the receiving box and is fixedly connected to a first pulley. The first pulley and the support rod are connected by a transmission belt. The inner wall surface of the sliding cylinder is fixedly connected to one side of the corresponding second pulley.

[0009] Preferably, rollers are rotatably connected to the top and bottom of both ends of the inner wall of the sliding cylinder, and the rollers abut against the surface of the support rod.

[0010] Preferably, the second transmission mechanism includes a fourth motor and a second transmission gear. The fourth motor is fixedly connected to the inner wall of the transmission box, and the second transmission gear is fixedly connected to the surface of the rotating shaft located in the inner cavity of the transmission box. The output shaft of the fourth motor is fixedly connected to a first transmission gear that meshes with the second transmission gear.

[0011] Preferably, the snap-fit ​​structure includes a connecting cylinder, which is fixedly connected to one end of the rotating shaft. The input end of the rotating shaft is embedded inside the connecting cylinder. A snap-fit ​​bolt is provided at the top of the connecting cylinder, and the inner end of the snap-fit ​​bolt abuts against the surface of the antenna body.

[0012] Preferably, a plurality of casters are fixedly connected to the lower surface of the base plate, and a plurality of telescopic foot pads are fixedly connected to the lower surface of the base plate.

[0013] Preferably, the surface of the receiving box is provided with a number of heat dissipation holes, and a fourth motor is fixedly connected between the top of the receiving box and the front side of the protective back plate.

[0014] Preferably, a storage box is fixedly connected to the other end of the base plate. The front and rear ends of the bottom of the inner wall of the storage box are both vertically fixedly connected to a fixing box. The top of the fixing box is provided with a telescopic lifting rod through a lifting mechanism. A connecting plate is fixedly connected to the top of the lifting rod. A toolbox is detachably connected to the upper surface of the connecting plate through connecting bolts. A partition is fixedly connected to the inner wall of the toolbox.

[0015] Preferably, the lifting mechanism includes a third motor, a threaded rod, and a threaded sleeve. The third motor is fixedly connected to the bottom of the inner wall of the fixed box. The threaded rod is vertically fixedly connected to the output shaft of the third motor. The threaded sleeve is threadedly connected to the surface of the threaded rod. The bottom end of the lifting rod is pulled out and extends into the inner cavity of the fixed box and is fixedly connected to the surface of the threaded sleeve. Beneficial effects

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: An antenna product with adjustable phase center correlation distance, after the drive mechanism operates, can move the housing to adjust the detection distance of the antenna body. After the first transmission mechanism operates, the detection height of the antenna body can be adjusted. And after the second transmission mechanism drives the rotating shaft to rotate, the rotation angle of the antenna body can be adjusted. This multi-dimensional adjustment freedom allows for accurate adjustment of the distance between the antenna and the object under test. In the testing of electronic and electrical equipment, it further enables a compensation adjustment function that ensures the distance from the object under test remains essentially constant despite changes in the phase center with the operating frequency. This reduces the uncertainty caused by changes in the antenna phase center and the allowable tolerance of the measurement distance, thereby improving the accuracy of the test results. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view of the present invention. Figure 3 This is a top view of the structure of the present invention; Figure 4 This is a schematic diagram of the structure of the first transmission mechanism in this invention; Figure 5 This is a schematic diagram of the structure of the second transmission mechanism in this invention; Figure 6This is a schematic diagram of the lifting mechanism in this invention.

[0018] In the diagram: 1. Base plate; 2. Casters; 3. Telescopic feet; 4. Sliding plate; 5. Sliding block; 6. Sliding track; 7. Support plate; 8. First motor; 9. Drive gear; 10. Rack plate; 11. Storage box; 12. Heat dissipation hole; 13. Transmission rod; 14. First pulley; 15. Support rod; 16. Sliding cylinder; 17. Transmission box; 18. Transmission belt; 19. First transmission gear; 20. Rotating shaft; 21. Second transmission gear; 22. Antenna body; 23. Snap-fit ​​bolt; 24. Roller; 25. Second pulley; 26. Storage box; 27. Fixing box; 28. Third motor; 29. ​​Threaded rod; 30. Threaded sleeve; 31. Lifting rod; 32. Connecting plate; 33. Connecting bolt; 34. Toolbox; 35. Partition; 36. Fourth motor; 37. Protective back plate; 38. Connecting cylinder; 39. Second motor. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] Please see Figure 1-6 The present invention provides a technical solution: an antenna product with adjustable phase center related distance. In the process of electromagnetic compatibility testing of electronic and electrical equipment, this product provides a carrier for realizing the adjustment function of the antenna phase center remaining basically unchanged from the distance to the test object as the operating frequency changes.

[0021] Includes a base plate 1, with sliding rails 6 horizontally fixedly connected to the front and rear sides of the upper surface of the base plate 1. Sliding blocks 5 are slidably fitted on the surface of the sliding rails 6. A sliding plate 4 is fixedly connected to the top of the sliding block 5. A receiving box 11 is fixedly connected to the upper surface of the sliding plate 4. A driving mechanism for driving the receiving box 11 to move in the horizontal direction is provided on the surface of the receiving box 11.

[0022] A protective back plate 37 is fixedly connected to the rear side of the container 11. Support rods 15 are vertically fixedly connected to both ends of the top of the protective back plate 37. A sliding cylinder 16 is slidably sleeved on the surface of the support rod 15. A first transmission mechanism for driving the sliding cylinder 16 to move up and down is provided in the inner cavity of the container 11.

[0023] A transmission box 17 is fixedly connected to the front side of the sliding cylinder 16. A rotating shaft 20 is rotatably connected inside the transmission box 17. Both ends of the rotating shaft 20 extend to the outside of the transmission box 17. An antenna body 22 is detachably mounted on one end of the rotating shaft 20 through a snap-fit ​​structure. A second transmission mechanism for driving the rotating shaft 20 to rotate is provided in the inner cavity of the transmission box 17.

[0024] After the drive mechanism is activated, it can move the housing 11, thereby adjusting the detection distance of the antenna body 22. After the first transmission mechanism is activated, the detection height of the antenna body 22 can be adjusted. After the second transmission mechanism drives the rotating shaft 20 to rotate, the rotation angle of the antenna body 22 can be adjusted. These multiple adjustment functions avoid the uncertainty caused by the antenna phase center as an influencing factor, reduce the measurement distance tolerance, and realize the automatic control function that keeps the distance from the object under test basically unchanged as the phase center changes with the working frequency, which is beneficial for antenna detection.

[0025] Furthermore, the drive mechanism includes two support plates 7, two first motors 8, and two rack plates 10. The two rack plates 10 are respectively fixedly connected to the front and rear sides of the upper surface of the base plate 1, and the two support plates 7 are respectively fixedly connected to the front and rear sides of one end face of the support plate 7.

[0026] Two first motors 8 are fixedly connected to the surfaces of one and the other support plates 7, respectively. The output shaft of the first motor 8 is fixedly connected to a drive gear 9 that meshes with the rack plate 10 on the same side.

[0027] In this embodiment, after the first motor 8 drives the drive gear 9 to rotate, it can drive the sliding block 5 to slide on the surface of the sliding track 6 through the meshing connection of the rack plate 10, thereby driving the container 11 to move in the horizontal direction.

[0028] Furthermore, the first transmission mechanism includes two second motors 39 and two second pulleys 25. The two second pulleys 25 are respectively disposed at the top of one and the other support rod 15, and the two second motors 39 are respectively disposed at one end and the other end of the inner cavity of the receiving box 11.

[0029] The output shaft of the second motor 39 is fixedly connected to a transmission rod 13. The rear end of the transmission rod 13 extends to the outside of the receiving box 11 and is fixedly connected to a first pulley 14. The first pulley 14 and the support rod 15 are connected by a transmission belt 18. The inner wall of the sliding cylinder 16 is fixedly connected to one side of the corresponding second pulley 25.

[0030] In this embodiment, after the second motor 39 drives the first pulley 14 to rotate through the transmission rod 13, the sliding cylinder 16 can be driven to slide on the surface of the support rod 15 through the connection and support of the second pulley 25.

[0031] Furthermore, rollers 24 are rotatably connected to the top and bottom of both ends of the inner wall of the sliding cylinder 16, and the rollers 24 abut against the surface of the support rod 15.

[0032] In this embodiment, the roller 24 rotates during the sliding process of the sliding cylinder 16, which improves the smoothness and stability of the sliding cylinder 16 during movement.

[0033] Furthermore, the second transmission mechanism includes a fourth motor 36 and a second transmission gear 21. The fourth motor 36 is fixedly connected to the inner wall of the transmission box 17, and the second transmission gear 21 is fixedly connected to the surface of the rotating shaft 20 located in the inner cavity of the transmission box 17. The output shaft of the fourth motor 36 is fixedly connected to a first transmission gear 19 that meshes with the second transmission gear 21.

[0034] In this embodiment, after the fourth motor 36 is working, it can drive the first transmission gear 19 to rotate, and then drive the rotating shaft 20 to rotate through the transmission of the second transmission gear 21.

[0035] Furthermore, the snap-fit ​​structure includes a connecting cylinder 38, which is fixedly connected to one end of the rotating shaft 20. The input end of the rotating shaft 20 is embedded inside the connecting cylinder 38. A snap-fit ​​bolt 23 is provided on the top of the connecting cylinder 38, and the inner end of the snap-fit ​​bolt 23 abuts against the surface of the antenna body 22.

[0036] In this embodiment, after the antenna body 22 is embedded inside the connecting cylinder 38, the locking bolt 23 is twisted. When the bottom end of the locking bolt 23 comes into contact with the surface of the antenna body 22, the antenna body 22 can be fixed.

[0037] Furthermore, several casters 2 are fixedly connected to the lower surface of the base plate 1, and several telescopic foot pads 3 are fixedly connected to the lower surface of the base plate 1.

[0038] In this embodiment, the casters 2 facilitate the movement of the base plate 1, and the telescopic feet 3 facilitate the support and fixation of the base plate 1 after it has been moved.

[0039] Furthermore, the surface of the housing 11 is provided with several heat dissipation holes 12, and a fourth motor 36 is fixedly connected between the top of the housing 11 and the front side of the protective back plate 37.

[0040] In this embodiment, the heat dissipation hole 12 facilitates ventilation and heat dissipation of the inner cavity of the receiving box 11, and the transmission rod 13 strengthens the connection between the first pulley 14 and the receiving box 11.

[0041] Furthermore, a storage box 26 is fixedly connected to the other end of the base plate 1. A fixing box 27 is vertically fixedly connected to the front and rear ends of the bottom of the inner wall of the storage box 26. A telescopic lifting rod 31 is set on the top of the fixing box 27 through a lifting mechanism.

[0042] A connecting plate 32 is fixedly connected to the top of the lifting rod 31. A toolbox 34 is detachably connected to the upper surface of the connecting plate 32 via connecting bolts 33. A partition 35 is fixedly connected to the inner wall of the toolbox 34.

[0043] In this embodiment, the partition 35 divides the interior of the toolbox 34 into multiple cavities, which facilitates the storage of different tools, and the toolbox 34 can be stored or moved out by the drive mechanism.

[0044] Furthermore, the lifting mechanism includes a third motor 28, a threaded rod 29, and a threaded sleeve 30. The third motor 28 is fixedly connected to the bottom of the inner wall of the fixed box 27, and the threaded rod 29 is vertically fixedly connected to the output shaft of the third motor 28.

[0045] The threaded sleeve 30 is threadedly connected to the surface of the threaded rod 29, and the bottom end of the lifting rod 31 is pulled out and extended into the inner cavity of the fixed box 27, and is fixedly connected to the surface of the threaded sleeve 30.

[0046] In this embodiment, after the third motor 28 drives the threaded rod 29 to rotate, it can drive the threaded sleeve 30 to move. By connecting the lifting rod 31, the toolbox 34 can be driven to move up and down.

[0047] The working principle and usage process of this invention: After the invention is installed, the drive mechanism moves the housing 11, thereby adjusting the detection distance of the antenna body 22. Then, the detection height of the antenna body 22 can be adjusted by the first transmission mechanism. After the second transmission mechanism drives the rotating shaft 20 to rotate, the rotation angle of the antenna body 22 can be adjusted. These multiple adjustment functions are used to accurately adjust the distance between the antenna and the object under test. Furthermore, this invention provides a platform for achieving a compensation adjustment function where the phase center changes with the working frequency while the distance from the object under test remains basically unchanged.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An antenna product with adjustable phase center correlation distance, comprising a base plate (1), characterized in that: The front and rear sides of the upper surface of the base plate (1) are both horizontally fixedly connected to sliding rails (6). The surface of the sliding rails (6) is slidably fitted with sliding blocks (5). The top of the sliding blocks (5) is fixedly connected to a sliding plate (4). The upper surface of the sliding plate (4) is fixedly connected to a receiving box (11). The surface of the receiving box (11) is provided with a driving mechanism to drive the receiving box (11) to move in the horizontal direction. The rear side of the container (11) is fixedly connected to a protective back plate (37). Both ends of the top of the protective back plate (37) are vertically fixedly connected to support rods (15). A sliding cylinder (16) is slidably sleeved on the surface of the support rod (15). The inner cavity of the container (11) is provided with a first transmission mechanism to drive the sliding cylinder (16) to move up and down. The front side of the sliding cylinder (16) is fixedly connected to a transmission box (17). The transmission box (17) is rotatably connected to a rotating shaft (20). Both ends of the rotating shaft (20) extend to the outside of the transmission box (17). One end of the rotating shaft (20) is detachably provided with an antenna body (22) through a snap-fit ​​structure. The inner cavity of the transmission box (17) is provided with a second transmission mechanism to drive the rotating shaft (20) to rotate.

2. The antenna product with adjustable phase center correlation distance as described in claim 1, characterized in that: The drive mechanism includes two support plates (7), two first motors (8), and two rack plates (10). The two rack plates (10) are fixedly connected to the front and rear sides of the upper surface of the base plate (1), respectively. The two support plates (7) are fixedly connected to the front and rear sides of one end face of the support plate (7), respectively. The two first motors (8) are fixedly connected to the surfaces of one and the other support plates (7), respectively. The output shaft of the first motor (8) is fixedly connected to a drive gear (9) that meshes with the rack plate (10) on the same side.

3. The antenna product with adjustable phase center correlation distance as described in claim 1, characterized in that: The first transmission mechanism includes two second motors (39) and two second pulleys (25). The two second pulleys (25) are respectively located at the top of one and the other of the support rod (15). The two second motors (39) are respectively located at one end and the other end of the inner cavity of the receiving box (11). The output shaft of the second motor (39) is fixedly connected to a transmission rod (13). The rear end of the transmission rod (13) extends to the outside of the receiving box (11) and is fixedly connected to a first pulley (14). The first pulley (14) and the support rod (15) are connected by a transmission belt (18). The inner wall of the sliding cylinder (16) is fixedly connected to one side of the corresponding second pulley (25).

4. The antenna product with adjustable phase center correlation distance as described in claim 1, characterized in that: Rollers (24) are rotatably connected to the top and bottom of both ends of the inner wall of the sliding cylinder (16), and the rollers (24) abut against the surface of the support rod (15).

5. The antenna product with adjustable phase center correlation distance as described in claim 1, characterized in that: The second transmission mechanism includes a fourth motor (36) and a second transmission gear (21). The fourth motor (36) is fixedly connected to the inner wall of the transmission box (17), and the second transmission gear (21) is fixedly connected to the surface of the rotating shaft (20) located in the inner cavity of the transmission box (17). The output shaft of the fourth motor (36) is fixedly connected to a first transmission gear (19) that meshes with the second transmission gear (21).

6. The antenna product with adjustable phase center correlation distance as described in claim 1, characterized in that: The snap-fit ​​structure includes a connecting cylinder (38), which is fixedly connected to one end of the rotating shaft (20). The input end of the rotating shaft (20) is embedded inside the connecting cylinder (38). A snap-fit ​​bolt (23) is provided on the top of the connecting cylinder (38), and the inner end of the snap-fit ​​bolt (23) abuts against the surface of the antenna body (22).

7. The antenna product with adjustable phase center correlation distance as described in claim 1, characterized in that: The lower surface of the base plate (1) is fixedly connected with several casters (2), and the lower surface of the base plate (1) is fixedly connected with several telescopic foot pads (3).

8. The antenna product with adjustable phase center correlation distance as described in claim 1, characterized in that: The surface of the container (11) is provided with several heat dissipation holes (12), and a fourth motor (36) is fixedly connected between the top of the container (11) and the front side of the protective back plate (37).

9. The antenna product with adjustable phase center correlation distance as described in claim 1, characterized in that: The other end of the base plate (1) is fixedly connected to a storage box (26). The front and rear ends of the bottom of the inner wall of the storage box (26) are both vertically fixedly connected to a fixing box (27). The top of the fixing box (27) is provided with a telescopic lifting rod (31) through a lifting mechanism. The top of the lifting rod (31) is fixedly connected to a connecting plate (32). The upper surface of the connecting plate (32) is detachably connected to a toolbox (34) through connecting bolts (33). The inner wall of the toolbox (34) is fixedly connected to a partition (35).

10. The antenna product with adjustable phase center correlation distance as described in claim 9, characterized in that: The lifting mechanism includes a third motor (28), a threaded rod (29), and a threaded sleeve (30). The third motor (28) is fixedly connected to the bottom of the inner wall of the fixed box (27). The threaded rod (29) is vertically fixedly connected to the output shaft of the third motor (28). The threaded sleeve (30) is threadedly connected to the surface of the threaded rod (29). The bottom end of the lifting rod (31) is pulled out and extended into the inner cavity of the fixed box (27) and is fixedly connected to the surface of the threaded sleeve (30).

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