An array antenna tester

Abstract

The utility model discloses an array antenna tester, including the crystal oscillator of generating signal source, the rotary table of installing antenna body and be used for to the network analyzer of antenna body test, the rotary table includes the base, the bearing fixedly embedded in the top of base and the rotating plug -in the inner ring of bearing's rotating lever, the rotating lever upper end fixedly connected with the carousel, the carousel bottom is provided with a plurality of circumferential distribution's rolling assembly, a plurality of circumferential distribution's support rod are fixedly connected with the base top. In the utility model, through the support ring to the ball is supported, namely indirectly to the carousel is supported, when the rotating lever and the carousel are driven by power rotation, the ball can be rolled in the arc -shaped groove inside the support ring, to guarantee the carousel steady rotation, thereby guaranteeing the stable rotation of antenna body, will not happen accidental swing, will not to the test process, equipment safety and final result produce multidimensional harm.

Description

Technical Field

[0001] This utility model relates to the field of antenna testing equipment technology, specifically an array antenna tester. Background Technology

[0002] Antenna testers typically refer to antenna testing systems, which usually include components such as antenna test turntables, network analyzers, and signal generators. They are used to measure various key performance indicators of antennas, such as gain and radiation patterns. The signal generator generates a specific frequency signal, which is amplified and fed into an auxiliary transmitting antenna for transmission into space. The turntable rotates the antenna under test at a set angle to receive the space signal. The network analyzer is connected to the antenna under test to measure the amplitude and phase of the received signal in real time and transmits the data to the control system. The software processes the signal data at different angles, plots the two-dimensional / three-dimensional radiation pattern of the antenna at that frequency, and calculates indicators such as half-power beamwidth (HPBW) and sidelobe level (SLL).

[0003] Turntable systems typically use motors to drive rotation. When the array antenna is heavy, the turntable drive shaft may wobble due to excessive load, causing the antenna to sway and become unstable. This can pose multi-dimensional hazards to the testing process, equipment safety, and final results. For example, radiation pattern measurements rely on the turntable's angular accuracy (e.g., data acquisition in 0.1° steps). Drive shaft wobble can cause random deviations (potentially ±0.5° or more) between the actual antenna pointing and the set angle. Furthermore, during wobble, the drive bearing is no longer subjected to a stable axial load, but rather to high-frequency alternating stress (impact forces generated by the swaying). Over time, the shaft material is prone to cracking, and may eventually break suddenly during high-load testing.

[0004] The utility model patent with publication number CN222926799U, entitled "An Antenna Tester for an Array Antenna," describes in its specification that "by driving a motor, the support platform can rotate along a rotating groove via a circular protrusion, thereby facilitating the rotation of the support platform." However, the drive bearing of the motor has a large load capacity, which can easily cause the array antenna to sway. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an array antenna tester that solves the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an array antenna tester, comprising a crystal oscillator for generating a signal source, a turntable for mounting the antenna body, and a network analyzer for testing the antenna body. The turntable includes a base, a bearing fixedly embedded in the top of the base, and a rotating rod rotatably inserted into the inner ring of the bearing. A turntable is fixedly connected to the upper end of the rotating rod, and multiple circumferentially distributed rolling components are provided at the bottom of the turntable. Multiple circumferentially distributed support rods are fixedly connected to the top of the base, and a support ring is fixedly connected to the upper end of the support rods. The rolling components can roll on the top of the support ring.

[0009] Preferably, the rolling assembly includes a connecting rod fixedly connected to the bottom of the turntable, a spherical shell fixedly connected to the lower end of the connecting rod, a rolling ball movably disposed inside the spherical shell, the lower end of the rolling ball extending to the outside of the spherical shell, and an annular arc groove opened at the top of the support ring, the lower end of the rolling ball being rotatably disposed inside the arc groove.

[0010] Preferably, a fixed clamping plate is fixedly connected to the top of the turntable, and a movable clamping plate is detachably installed on the fixed clamping plate. The movable clamping plate and the fixed clamping plate cooperate to clamp and fix the main rod of the antenna body.

[0011] Preferably, the movable clamping plate is fixedly connected to two symmetrically distributed studs on the side near the fixed clamping plate. The fixed clamping plate has symmetrically distributed through holes. The ends of the studs pass through the through holes and are threaded with nuts. The nuts are in contact with the fixed clamping plate.

[0012] Preferably, the movable clamping plate and the fixed clamping plate each have an arc-shaped clamping opening on their opposite sides, and a rubber pad is fixedly connected to the inner wall of the clamping opening.

[0013] Preferably, a driven gear is coaxially fixedly connected to the rotating rod, a motor is fixedly installed on the base, a driving gear is fixedly connected to the output end of the motor, the driving gear meshes with the driven gear, and the pitch circle diameter of the driving gear is smaller than that of the driven gear.

[0014] (III) Beneficial Effects

[0015] This invention provides an array antenna tester, which has the following advantages:

[0016] 1. In this utility model, the ball is supported by a support ring, which indirectly supports the turntable. When the rotating rod and the turntable are driven by power rotation, the ball can roll inside the arc groove of the support ring to ensure the smooth rotation of the turntable, thereby ensuring the stable rotation of the antenna body and preventing accidental swaying; it will not cause multi-dimensional harm to the testing process, equipment safety and final results; it ensures that the actual pointing of the antenna is the same as the set angle, which meets the measurement standard; and it also avoids the situation where the shaft material is prone to cracking under long-term action, and may eventually break suddenly during high-load testing.

[0017] 2. In this utility model, the starting motor drives the driving gear to rotate, the driving gear drives the driven gear to rotate, and the driven gear drives the rotating rod and the turntable to rotate. Since the pitch circle diameter of the driving gear is smaller than that of the driven gear, the speed is reduced, ensuring that the turntable and the antenna body on its top rotate smoothly. Attached Figure Description

[0018] Figure 1 This is a front-view three-dimensional structural diagram of an array antenna tester proposed in this utility model;

[0019] Figure 2 This is a rear-view three-dimensional structural diagram of an array antenna tester proposed in this utility model;

[0020] Figure 3 for Figure 1 Enlarged structural diagram at point A;

[0021] Figure 4 for Figure 2 Enlarged structural diagram at point B;

[0022] Figure 5 This is a structural diagram of the antenna installation state of an array antenna tester proposed in this utility model;

[0023] Figure 6 This is a structural diagram of the antenna separation state of an array antenna tester proposed in this utility model.

[0024] In the diagram: 1. Base; 2. Bearing; 3. Rotating rod; 4. Turntable; 5. Support rod; 6. Support ring; 601. Arc groove; 7. Connecting rod; 8. Spherical shell; 9. Rolling ball; 10. Moving clamp plate; 11. Fixed clamp plate; 12. Stud; 13. Nut; 14. Driven gear; 15. Driving gear; 16. Motor; 17. Antenna body; 171. Main rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Please see Figures 1 to 3 This utility model provides a technical solution: an array antenna tester, including a crystal oscillator for generating a signal source, a turntable for mounting an antenna body 17, and a network analyzer for testing the antenna body 17. The turntable includes a base 1, a bearing 2 fixedly embedded in the top of the base 1, and a rotating rod 3 rotatably inserted into the inner ring of the bearing 2. A turntable 4 is fixedly connected to the upper end of the rotating rod 3. Multiple circumferentially distributed rolling components are provided at the bottom of the turntable 4. Multiple circumferentially distributed support rods 5 are fixedly connected to the top of the base 1. A support ring 6 is fixedly connected to the upper end of the support rods 5. The rolling components can roll on the top of the support ring 6.

[0027] When the rotating rod 3 is driven by an external force, it can rotate on the bearing 2, causing the turntable 4 to rotate synchronously; the rolling component at the bottom of the turntable 4 rolls on the support ring 6, which improves the stability of the turntable 4 when it rotates.

[0028] Reference Figure 3 The rolling assembly includes a connecting rod 7 fixedly connected to the bottom of the turntable 4. A ball shell 8 is fixedly connected to the lower end of the connecting rod 7. A rolling ball 9 is movably arranged inside the ball shell 8. The lower end of the rolling ball 9 extends to the outside of the ball shell 8. An annular arc groove 601 is opened at the top of the support ring 6. The lower end of the rolling ball 9 is rotatably arranged inside the arc groove 601.

[0029] The ball 9 is supported by the support ring 6, which indirectly supports the turntable 4. When the rotating rod 3 and the turntable 4 are driven by power rotation, the ball 9 can roll inside the arc groove 601 of the support ring 6 to ensure the smooth rotation of the turntable 4, thereby ensuring the stable rotation of the antenna body 17 and preventing accidental swaying. This will not cause multi-dimensional harm to the testing process, equipment safety, and final results. It will also ensure that the actual pointing angle of the antenna body 17 is the same as the set angle, which meets the measurement standards. It will also avoid the situation where the shaft material is prone to cracking under long-term action, and may eventually break suddenly during high-load testing.

[0030] Reference Figure 2 , Figures 4 to 6 A fixed clamping plate 11 is fixedly connected to the top of the turntable 4. A movable clamping plate 10 is detachably installed on the fixed clamping plate 11. The movable clamping plate 10 and the fixed clamping plate 11 cooperate to clamp and fix the main rod 171 of the antenna body 17.

[0031] When installing the antenna body 17, the main rod 171 at its bottom is inserted between the movable clamping plate 10 and the fixed clamping plate 11. The movable clamping plate 10 is brought close to the fixed clamping plate 11, so that the movable clamping plate 10 and the fixed clamping plate 11 clamp the main rod 171.

[0032] Reference Figure 4Two symmetrically distributed studs 12 are fixedly connected to the side of the movable clamping plate 10 near the fixed clamping plate 11. The fixed clamping plate 11 has symmetrically distributed through holes. The ends of the studs 12 pass through the through holes and are threaded with nuts 13. When the antenna body 17 is locked, the nuts 13 abut against the fixed clamping plate 11.

[0033] When the moving clamp 10 is brought close to the fixed clamp 11, the stud 12 passes through the corresponding through hole. Then, the nut 13 is screwed on the end of the stud 12 to achieve the locking purpose, ensuring that the moving clamp 10 and the fixed clamp 11 firmly clamp the main rod 171.

[0034] Reference Figure 4 Both the movable clamping plate 10 and the fixed clamping plate 11 have arc-shaped clamping openings on opposite sides, and rubber pads are fixedly connected to the inner walls of the clamping openings.

[0035] Both sides adopt an arc-shaped design, which fits the outer contour of the main rod 171 better, increases the contact area between the clamping plate and the workpiece, and is less prone to slippage compared to flat clamping, thus improving clamping stability.

[0036] The rubber pad on the inner wall of the clamping opening is an important auxiliary structure. On the one hand, the rubber material has a certain elasticity, which can play a buffering role during clamping, reducing the hard pressure of the clamping plate on the surface of the main rod 171 and protecting the main rod 171 from scratches. On the other hand, the rubber has a large coefficient of friction, which can further enhance the friction between the clamping plate and the main rod 171, preventing the main rod 171 from loosening or shifting during clamping.

[0037] Reference Figures 5-6 A driven gear 14 is coaxially fixedly connected to the rotating rod 3, and a motor 16 is fixedly installed on the base 1. A driving gear 15 is fixedly connected to the output end of the motor 16. The driving gear 15 meshes with the driven gear 14, and the pitch circle diameter of the driving gear 15 is smaller than that of the driven gear 14.

[0038] The motor 16 is started, which drives the drive gear 15 to rotate. The drive gear 15 drives the driven gear 14 to rotate, and the driven gear 14 drives the rotating rod 3 and the turntable 4 to rotate. Since the pitch circle diameter of the drive gear 15 is smaller than that of the driven gear 14, the speed is reduced, ensuring that the turntable 4 and the antenna body 17 on its top rotate smoothly.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An array antenna tester, comprising a crystal oscillator for generating a signal source, a turntable for mounting an antenna body (17), and a network analyzer for testing the antenna body (17), characterized in that: The turntable includes a base (1), a bearing (2) fixedly embedded in the top of the base (1), and a rotating rod (3) rotatably inserted into the inner ring of the bearing (2). A turntable (4) is fixedly connected to the upper end of the rotating rod (3). Multiple circumferentially distributed rolling components are provided at the bottom of the turntable (4). Multiple circumferentially distributed support rods (5) are fixedly connected to the top of the base (1). A support ring (6) is fixedly connected to the upper end of the support rods (5). The rolling components can roll on the top of the support ring (6).

2. The array antenna tester according to claim 1, characterized in that: The rolling assembly includes a connecting rod (7) fixedly connected to the bottom of the turntable (4). The lower end of the connecting rod (7) is fixedly connected to a spherical shell (8). A rolling ball (9) is movably arranged inside the spherical shell (8). The lower end of the rolling ball (9) extends to the outside of the spherical shell (8). The top of the support ring (6) is provided with an annular arc groove (601). The lower end of the rolling ball (9) is rotatably arranged inside the arc groove (601).

3. The array antenna tester according to claim 1, characterized in that: The top of the turntable (4) is fixedly connected to a fixed clamping plate (11), and a movable clamping plate (10) is detachably installed on the fixed clamping plate (11). The movable clamping plate (10) and the fixed clamping plate (11) cooperate to clamp and fix the main rod (171) of the antenna body (17).

4. The array antenna tester according to claim 3, characterized in that: The movable clamping plate (10) is fixedly connected to two symmetrically distributed studs (12) on the side near the fixed clamping plate (11). The fixed clamping plate (11) has symmetrically distributed through holes. The ends of the studs (12) are set through the through holes. The ends of the studs (12) are threaded with nuts (13). The nuts (13) are in contact with the fixed clamping plate (11).

5. An array antenna tester according to claim 3, characterized in that: The moving clamp (10) and the fixed clamp (11) each have an arc-shaped clamping opening on one side, and a rubber pad is fixedly connected to the inner wall of the clamping opening.

6. The array antenna tester according to claim 1, characterized in that: A driven gear (14) is coaxially fixedly connected to the rotating rod (3), and a motor (16) is fixedly installed on the base (1). A driving gear (15) is fixedly connected to the output end of the motor (16). The driving gear (15) meshes with the driven gear (14), and the pitch circle diameter of the driving gear (15) is smaller than that of the driven gear (14).

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