Direct drive VICTS satellite communication antenna

Abstract

The application discloses a kind of direct drive VICTS satellite communication antennas, including: rotor and stator;The rotor includes sequentially superimposed: feed layer, radiation layer, lower polarization layer and upper polarization layer;The stator is used to fix the feed layer in rotor, radiation layer, lower polarization layer and upper polarization layer;The application solves the problem that the rotation accuracy and response speed of the existing VICTS phased array antenna are slow, which generally adopts the transmission mode of motor driven gear or belt.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of satellite communication systems, in particular to a direct-drive VICTS satellite communication antenna. BACKGROUND

[0002] In a conventional satellite antenna servo control system, a direct-current motor or a permanent magnet synchronous motor is usually used, and the motor and the antenna are connected through an intermediate link. The commutator, position sensor and the like in the direct-current motor complicate the electrical connection of the system, make maintenance difficult, and the commutation friction easily causes the system stability to decrease, which has great limitations in a high-speed rotating satellite antenna system. The permanent magnet synchronous motor has simple structure, high power density and high control precision, and although the performance of the motor in the satellite antenna AC servo control system is good, the motor also inevitably uses a coupling and a gear when connected with the satellite antenna, which makes the system more complex, increases the response time and reduces the reliability. SUMMARY

[0003] In view of the above problems in the prior art, the direct-drive VICTS satellite communication antenna provided by the application solves the problem that the rotation precision and response speed of a VICTS phased array antenna are slow because the VICTS phased array antenna usually adopts a transmission mode in which a motor drives a gear or a belt.

[0004] To achieve the above-mentioned application purposes, the application adopts the technical scheme of a direct-drive VICTS satellite communication antenna, which comprises a rotor and a stator.

[0005] The rotor comprises, in sequence, a feed layer, a radiation layer, a lower polarization layer and an upper polarization layer.

[0006] The stator is used for fixing the feed layer, the radiation layer, the lower polarization layer and the upper polarization layer in the rotor.

[0007] The application has the advantages that the motor and the satellite antenna are integrated, the antenna body becomes the rotor, the intermediate connection link is reduced, the system structure is simplified, the satellite searching time is shortened, and the system reliability is improved.

[0008] The rotor is directly driven by the stator coil on the stator, so that the response speed of the rotor is fast and the control precision is high.

[0009] Further, bearing balls are arranged between the upper polarization layer and the lower polarization layer, between the lower polarization layer and the radiation layer, and between the radiation layer and the feed layer.

[0010] The beneficial effect of the above further solution is that bearing balls are set between each layer of the antenna to facilitate the relative movement between the feed layer, radiation layer, lower polarization layer and upper polarization layer, so that each layer can move independently and the movement direction can be controlled at will.

[0011] Furthermore, the stator comprises: a stator coil, fastening screws, a housing and a base plate;

[0012] The fastening screws are used to fix the housing to the base plate; the stator coil is fixed to the housing.

[0013] The beneficial effect of the above further solution is that the fastening screws, the housing and the base plate are devices for fixing the rotor and are carriers of the rotor.

[0014] Furthermore, the stator further comprises: a spring; and a portion of the spring which is sleeved on the fastening screw and exposed on the outer shell.

[0015] The beneficial effect of the above further solution is that when the feed layer, radiation layer, lower polarization layer or upper polarization layer rotates, axial movement is bound to occur. The present invention suppresses the axial jump of the antenna by providing a spring on the fastening screw.

[0016] Furthermore, the number of the stator coils is 12, wherein every four stator coils are located at the same position of the rotor.

[0017] Furthermore, the rotor further includes: permanent magnets; the number of the permanent magnets is 12, and every four permanent magnets are located at the same position of the rotor.

[0018] Furthermore, a bearing ball is provided between the feed layer and the base plate.

[0019] The beneficial effect of the above further solution is that after the bearing spheres are arranged between the feed layer and the base plate, the movement of the feed layer is facilitated.

[0020] Furthermore, a bearing ball is provided between the upper polarization layer and the outer shell.

[0021] The beneficial effect of the above further solution is that after the bearing ball is arranged between the upper polarization layer and the outer shell, the movement of the upper polarization layer is facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the rotor and stator coil;

[0023] Figure 2 Schematic diagram of the structure of the junction of the rotor and the stator;

[0024] Among them, 1. upper polarization layer; 2. lower polarization layer; 3. radiation layer; 4. feed layer; 5. stator coil; 6. permanent magnet; 7. bearing ball; 8. fastening screw; 9. spring; 10. outer shell; 11. bottom plate; 51. first stator coil; 52. second stator coil; 53. third stator coil; 54. fourth stator coil. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0026] like Figures 1-2 As shown, a direct-drive VICTS satellite communication antenna includes: a rotor and a stator;

[0027] The rotor comprises: a feed layer 4, a radiation layer 3, a lower polarization layer 2 and an upper polarization layer 1 stacked in sequence;

[0028] The stator is used to fix the feeding layer 4, the radiation layer 3, the lower polarization layer 2 and the upper polarization layer 1 in the rotor.

[0029] The present invention integrates the motor and the satellite antenna so that the antenna body becomes the rotor, reduces intermediate connection links, simplifies the system structure, shortens the satellite search time, and improves the system reliability.

[0030] The rotor is directly driven by controlling the stator coil 5 on the stator, so that the rotor responds quickly and has high control accuracy.

[0031] A bearing sphere 7 is provided between the upper polarization layer 1 and the lower polarization layer 2 , a bearing sphere 7 is provided between the lower polarization layer 2 and the radiation layer 3 , and a bearing sphere 7 is provided between the radiation layer 3 and the feed layer 4 .

[0032] Bearing spheres 7 are provided between each layer of the antenna to facilitate relative movement between the feed layer 4, the radiation layer 3, the lower polarization layer 2 and the upper polarization layer 1, so that each layer can move independently and the movement direction can be controlled at will.

[0033] The stator includes: stator coil 5, fastening screws 8, housing 10 and base plate 11;

[0034] The fastening screws 8 are used to fix the housing 10 to the base plate 11 ; the stator coil 5 is fixed to the housing 10 .

[0035] The fastening screws 8, the housing 10 and the base plate 11 are devices for fixing the rotor and are the carriers of the rotor.

[0036] The stator further includes a spring 9 ; the spring 9 is sleeved on the portion of the fastening screw 8 exposed on the housing 10 .

[0037] When the feed layer 4, radiation layer 3, lower polarization layer 2, or upper polarization layer 1 rotates, axial movement is inevitable. The present invention suppresses axial runout of the antenna layer and reduces friction by providing a spring 9 on the fastening screw 8. The radial displacement of the antenna rotor of each layer is less than 0.05 mm, and the friction torque of the motor at any position is less than 0.2 N·m, meeting the requirements of the airborne impact and vibration environment.

[0038] The number of stator coils 5 is 12, wherein every four stator coils 5 are located at the same position of the rotor.

[0039] like Figure 1 As shown, the four stator coils 5 in the same orientation are respectively: a first stator coil 51 , a second stator coil 52 , a third stator coil 53 and a fourth stator coil 54 .

[0040] The rotor further includes: permanent magnets 6; the number of the permanent magnets 6 is 12, and every four permanent magnets 6 are located at the same position of the rotor.

[0041] like Figure 2 As shown, when the rotor is stationary, the permanent magnets 6 can be rotated to face the stator coils 5 , with one stator coil 5 corresponding to one layer of permanent magnets 6 .

[0042] The permanent magnet 6 on the upper polarization layer 1 is controlled by supplying power to the first stator coil 51 , thereby controlling the rotation speed and rotation angle of the upper polarization layer 1 .

[0043] The permanent magnet 6 on the lower polarization layer 2 is controlled by supplying power to the second stator coil 52 , thereby controlling the rotation speed and rotation angle of the lower polarization layer 2 .

[0044] The permanent magnet 6 on the radiation layer 3 is controlled by supplying power to the third stator coil 53 , thereby controlling the rotation speed and rotation angle of the radiation layer 3 .

[0045] The permanent magnet 6 on the feed layer 4 is controlled by supplying power to the fourth stator coil 54 , thereby controlling the rotation speed and rotation angle of the feed layer 4 .

[0046] For example: 1. When the fourth stator coil 54 and the third stator coil 53 are energized, the feeding layer 4 and the radiation layer 3 can be controlled to have the same rotation speed by controlling the energizing time and amount of the fourth stator coil 54 and the third stator coil 53, thereby achieving 360° azimuth scanning of the beam.

[0047] 2. The feeding layer 4 and the radiating layer 3 have different rotation speeds, and relative motion occurs between them. The beam scans through the gap between the two layers to achieve beam pitch scanning, which can achieve pitch scanning of 0-85°.

[0048] 3. When the first stator coil 51 and the second stator coil 52 are energized, the rotation of the lower polarization layer 2 and the upper polarization layer 1 is controlled to achieve matching adjustment of the polarization state of the antenna and the satellite.

[0049] A bearing ball 7 is provided between the feed layer 4 and the bottom plate 11. After the bearing ball 7 is provided between the feed layer 4 and the bottom plate 11, the movement of the feed layer 4 is facilitated.

[0050] A bearing ball 7 is provided between the upper polarization layer 1 and the housing 10. The bearing ball 7 is provided between the upper polarization layer 1 and the housing 10 to facilitate the movement of the upper polarization layer 1.

[0051] In summary, the beneficial effects of the present invention are:

[0052] 1. The present invention integrates the motor and the satellite antenna into one, and directly controls the permanent magnet 6 on the rotor through the stator coil 5 on the stator, thereby achieving direct control of the antenna, avoiding intermediate structures, and improving control accuracy.

[0053] 2. The spring 9 and the housing 10 of the present invention cooperate to form a pre-tightening mechanism, which can suppress the axial runout of the antenna, improve the rotation accuracy of the antenna rotor, and further improve the reliability of the system.

Claims

1. A phased array antenna, characterized in that: include: rotor and stator; The rotor comprises: a feed layer (4), a radiation layer (3), a lower polarization layer (2), and an upper polarization layer (1) stacked in sequence; a bearing sphere (7) is provided between the upper polarization layer (1) and the lower polarization layer (2), a bearing sphere (7) is provided between the lower polarization layer (2) and the radiation layer (3), and a bearing sphere (7) is provided between the radiation layer (3) and the feed layer (4); The stator is used to fix the feed layer (4), the radiation layer (3), the lower polarization layer (2) and the upper polarization layer (1) in the rotor; the stator comprises: a stator coil (5), a fastening screw (8), a housing (10) and a base plate (11); The fastening screws (8) are used to fix the housing (10) and the base plate (11); The stator coil (5) is fixed to the housing (10); The rotor further comprises permanent magnets (6); the number of the permanent magnets (6) is 12, and every four permanent magnets (6) are located at the same position of the rotor.

2. The phased array antenna according to claim 1, wherein: The stator further comprises: a spring (9); the spring (9) is sleeved on the portion of the fastening screw (8) exposed on the housing (10).

3. The phased array antenna according to claim 1, wherein: The number of the stator coils (5) is 12, wherein every four stator coils (5) are located at the same position of the rotor.

4. The phased array antenna according to claim 1, wherein: A bearing ball (7) is provided between the feed layer (4) and the bottom plate (11).

5. The phased array antenna according to claim 1, wherein: A bearing ball (7) is provided between the upper polarization layer (1) and the outer shell (10).

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