VICTS satellite communication antenna

Abstract

The invention relates to the technical field of satellite communication, in particular to a VICTS satellite communication antenna which comprises an orientation rotation structure, an antenna feed plate and an antenna radiation plate which are arranged in sequence. A telescopic structure is arranged between the antenna feed plate and the antenna radiation plate; the telescopic structure stretches out and draws back according to the direction positioning instruction to adjust the relative rotation angle between the antenna feed panel and the antenna radiation panel, so that the direction of an antenna output beam is an initial adjustment rotation direction; the azimuth rotation structure drives the antenna feed disc and the antenna radiation disc to rotate together according to the direction positioning instruction so as to adjust the direction of an antenna output beam from an initial rotation direction to a target output direction; and the antenna feed panel converts a fed high-frequency electromagnetic signal into a linear feed source signal, and radiates the linear feed source signal to an external space through the antenna radiation panel according to a target output direction. The relative rotation angle and the common rotation angle of the feed disc and the radiation disc are independently controlled, and the beam control mode of the antenna is simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of satellite communications, and in particular to a VICTS satellite communications antenna. Background Art

[0002] Satellite communication antennas usually have the ability to adjust the beam in azimuth and elevation to align with high-orbit or low-orbit satellites to achieve communication connections. Common satellite communication antenna forms include parabolic antennas, plate antennas, phased array antennas, and variable inclination continuous transverse slot (VICTS) antennas. Among them, parabolic antennas and plate antennas usually do not have beam scanning capabilities themselves, and rely on the azimuth and elevation servo motor structures outside the antenna to achieve beam adjustment, resulting in a high antenna profile and high wind resistance, which is not conducive to carrier installation. Phased array antennas usually use a large number of antenna units to form an array, and the overall integrated design is complex, and the various chips and devices are expensive and power-hungry.

[0003] The VICTS antenna is a mechanical beam scanning antenna. Each layer of the antenna is driven by a separate motor. The relative rotation or joint rotation between the layers of the antenna depends on the cooperation between the motors. Each motor cannot independently control the relative rotation or joint rotation angle, which makes the beam control algorithm of the VICTS antenna very complex.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide a VICTS satellite communication antenna, aiming to solve the technical problem of complex beam control algorithm of the VICTS antenna in the prior art.

[0006] To achieve the above object, the present invention proposes a VICTS satellite communication antenna, the VICTS satellite communication antenna comprising: an azimuth rotation structure, an antenna feed dish and an antenna radiation dish arranged in sequence from bottom to top; A telescopic structure is provided between the antenna feeding plate and the antenna radiation plate; The telescopic structure is used to receive an input direction positioning instruction, and to telescope according to the direction positioning instruction to adjust the relative rotation angle between the antenna feeding plate and the antenna radiation plate, so that the direction of the antenna output beam is the initial adjustment rotation direction; The azimuth rotation structure is used to receive the direction positioning instruction, and drive the antenna feed plate and the antenna radiation plate to rotate together according to the direction positioning instruction to adjust the direction of the antenna output beam from the initial adjustment rotation direction to the target output direction; The antenna feed plate is used to convert the input high-frequency electromagnetic signal into a linear feed signal, and radiate the linear feed signal to the external space through the antenna radiation plate according to the target output direction.

[0007] Optionally, the antenna feed plate comprises: a line source conversion structure and a feed plate main body structure; The line source conversion structure is arranged on a side close to the azimuth rotation structure, and the feeding disk main body structure is arranged on a side close to the antenna radiation disk; The line source conversion structure is used to convert the high-frequency electromagnetic signal fed into the waveguide port into a linear feed source signal, and transmit the linear feed source signal to the feed disk main structure; The feeding disk main body structure is used to receive the linear feed source signal into the internal cavity, and radiate the linear feed source signal in the internal cavity to the external space through the antenna radiation disk.

[0008] Optionally, a circular through hole is provided in the middle portion of the azimuth rotation structure, and the line source conversion structure further comprises: a waveguide rotation joint; The waveguide rotating joint is connected to the waveguide port of the line source conversion structure through the circular through hole to feed the high-frequency electromagnetic signal into the line source conversion structure.

[0009] Optionally, the antenna radiation plate includes: a first slot structure, a second slot structure and a third slot structure arranged in sequence from bottom to top; The width of the slits in the first slit structure is narrower than the width of the slits in the second slit structure; The number of slots in the third slot structure is twice the number of slots in the first slot structure.

[0010] Optionally, the VICTS satellite communication antenna further comprises: a first ball bearing layer; The first ball bearing layer is arranged between the antenna feeding plate and the antenna radiation plate.

[0011] Optionally, the telescopic structure is a first arc-shaped electrically controlled telescopic rod; the telescopic structure further comprises: a first pin structure and a second pin structure arranged at two ends of the first arc-shaped electrically controlled telescopic rod; The first arc-shaped electrically-controlled telescopic rod is connected to the antenna feeding plate through the first pin structure, and the first arc-shaped electrically-controlled telescopic rod is connected to the antenna radiation plate through the second pin structure.

[0012] Optionally, the VICTS satellite communication antenna further comprises: a polarization matching disk and a polarization adjustment structure; The polarization matching disk is arranged on a side of the antenna radiation disk away from the antenna feeding disk; The polarization adjustment structure is arranged between the antenna radiation plate and the polarization matching plate; The polarization adjustment structure is used to receive an input polarization positioning instruction and adjust the polarization direction between the antenna radiation dish and the communication satellite according to the polarization positioning instruction.

[0013] Optionally, the polarization adjustment structure is a second arc-shaped electrically controlled telescopic rod; the polarization adjustment structure further comprises: a third pin structure and a fourth pin structure arranged at two ends of the second arc-shaped electrically controlled telescopic rod; The second arc-shaped electrically-controlled telescopic rod is connected to the antenna radiation disk through the third pin structure, and the second arc-shaped electrically-controlled telescopic rod is connected to the polarization matching disk through the fourth pin structure.

[0014] Optionally, the VICTS satellite communication antenna further comprises: a second ball bearing layer; The second ball bearing layer is arranged between the antenna radiation disk and the polarization matching disk.

[0015] In addition, to achieve the above-mentioned purpose, the present invention also provides a satellite communication system, which includes the VICTS satellite communication antenna as described above.

[0016] The present invention provides a VICTS satellite communication antenna, which comprises: an azimuth rotation structure, an antenna feed disk and an antenna radiation disk which are arranged in sequence from bottom to top; a telescopic structure is arranged between the antenna feed disk and the antenna radiation disk; the telescopic structure is used to receive an input direction positioning instruction, and is telescoped according to the direction positioning instruction to adjust the relative rotation angle between the antenna feed disk and the antenna radiation disk, so that the direction of the antenna output beam is an initial adjustment rotation direction; the azimuth rotation structure is used to receive the direction positioning instruction, and drive the antenna feed disk and the antenna radiation disk to rotate together according to the direction positioning instruction to adjust the direction of the antenna output beam from the initial adjustment rotation direction to a target output direction; the antenna feed disk is used to convert a fed high-frequency electromagnetic signal into a linear feed source signal, and radiate the linear feed source signal to the external space through the antenna radiation disk according to the target output direction. The telescopic drive structure can control the relative rotation angle of the feed dish and the radiation dish, and the corresponding antenna beam can perform large-angle scanning in the pitch plane, while the azimuth rotation structure can control the entire antenna feed dish and the antenna radiation dish to rotate together within 360 degrees in the azimuth plane, thereby adjusting the azimuth angle of the antenna beam. The relative rotation angle and the common rotation angle of the antenna feed dish and the antenna radiation dish are controlled separately, which greatly simplifies the antenna beam control method and improves the beam control accuracy and beam pointing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 A schematic structural diagram of a first embodiment of a VICTS satellite communication antenna according to the present invention; Figure 2 A schematic diagram of a curve showing the corresponding relationship between the elevation angle and the azimuth angle of the beam pointing at different rotation angles in the first embodiment of the VICTS satellite communication antenna of the present invention; Figure 3 A structural schematic diagram of a beam adjustment state in the first embodiment of the VICTS satellite communication antenna of the present invention; Figure 4 It is a schematic diagram of the structure explosion of the second embodiment of the VICTS satellite communication antenna of the present invention; Figure 5 A schematic cross-sectional view of the structure of a second embodiment of a VICTS satellite communication antenna according to the present invention; Figure 6 It is a schematic structural diagram of the third embodiment of the VICTS satellite communication antenna of the present invention.

[0019] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] The main solution of the embodiment of the present invention is: the VICTS satellite communication antenna includes: an azimuth rotation structure 1, an antenna feed plate 2 and an antenna radiation plate 3 arranged in sequence from bottom to top; a telescopic structure 4 is arranged between the antenna feed plate 2 and the antenna radiation plate 3. The telescopic structure 4 can be used to receive the input direction positioning instruction, and telescope according to the direction positioning instruction to adjust the relative rotation angle between the antenna feed plate 2 and the antenna radiation plate 3, so that the direction of the antenna output beam is the initial adjustment rotation direction; the azimuth rotation structure 1 is used to receive the direction positioning instruction, and drive the antenna feed plate 2 and the antenna radiation plate 3 to rotate together according to the direction positioning instruction to adjust the direction of the antenna output beam from the initial adjustment rotation direction to the target output direction; the antenna feed plate 2 is used to convert the input high-frequency electromagnetic signal into a linear feed source signal, and radiate the linear feed source signal to the external space through the antenna radiation plate 3 according to the target output direction.

[0025] Satellite communication antennas usually have the ability to adjust the beam in azimuth and elevation to align with high-orbit or low-orbit satellites to achieve communication connections. Common satellite communication antennas include parabolic antennas, plate antennas, phased array antennas, and VICTS antennas. Among them, parabolic antennas and plate antennas usually do not have beam scanning capabilities themselves, and rely on the azimuth and elevation servo motor structures outside the antenna to achieve beam adjustment, resulting in a high antenna profile and high wind resistance, which is not conducive to carrier installation. Array antennas usually use a large number of antenna units to form an array, and adjust the amplitude and phase information of the antenna units through electronic phase shifter chips to achieve beam scanning of the antenna array without rotating the antenna surface. Phased array antennas have a low profile and fast beam scanning speed, but the overall integrated design is complex, and the various chips and devices are expensive and power-hungry. The VICTS antenna is a mechanical beam scanning antenna, usually composed of a stack of feed dishes, radiation dishes, polarization dishes, etc. The adjustment of the beam in the azimuth and elevation planes is achieved by rotating each layer of dishes in the horizontal plane. There is no need to rotate the antenna dish in the elevation plane, and the overall low-profile design can be achieved. In the rotation of each layer of the VICTS antenna, the relative rotation angle of the feed dish and the radiation dish is crucial to changing the direction of the beam elevation angle. The relative rotation angle of the feed dish and the radiation dish is nonlinear with the beam azimuth and elevation angles. If at a certain moment, the beam needs to be controlled to point to a specific elevation angle A and azimuth angle B, it is necessary to first find the relative rotation angle C corresponding to the elevation angle A according to the relative rotation angle of the feed dish and the radiation dish, and the corresponding relationship between the elevation angle and the azimuth angle, and then control the feed dish and the radiation dish to reach this relative rotation angle C. At this time, the azimuth angle corresponding to the beam is B'. In most cases, B' is not equal to the required azimuth angle B. At this time, the feed dish and the radiation dish are rotated together (joint rotation only changes the azimuth angle without affecting the beam elevation angle A), so that the beam reaches the azimuth angle B from the azimuth angle B', thereby completing the beam pointing adjustment. Each layer of the antenna has a separate motor drive. The relative rotation or joint rotation between the antenna layers depends on the cooperation between the motors. Each motor cannot independently control the relative rotation or joint rotation angle, which makes the beam control algorithm of the VICTS antenna very complicated. To achieve high-precision pointing of the antenna beam, the tolerance between the servo structures corresponding to each dish and the synchronous cooperation of the motors are very high.

[0026] Reference Figure 1 , Figure 1 FIG. 4 is a schematic diagram of the structure of the first embodiment of the VICTS satellite communication antenna of the present invention. Figure 1As shown, in this embodiment, the telescopic structure can control the relative rotation angle of the feed plate and the radiation plate by extending and shortening, and adjust the angle of the antenna beam in the pitch plane according to the received direction positioning instruction, wherein the direction positioning instruction can be a control instruction calculated based on the satellite's ephemeris data and the ground GPS coordinates to drive the antenna to point to the satellite. For a VICTS antenna, the corresponding relationship curve between the rotation angle of the feed plate and the beam pointing formed in space can be obtained through modeling simulation or actual measurement. Figure 2 , Figure 2 Schematic diagram of the corresponding relationship curve between the elevation angle and the azimuth angle of the beam pointing at different rotation angles in the first embodiment of the VICTS satellite communication antenna of the present invention. cal ,φ cal ) and (θ closeed ,φ closeded ) represent the beam pointing elevation angle (angle away from the array normal) and azimuth angle obtained by full-wave simulation, theoretical model in dynamic coordinate system and theoretical model in fixed reference coordinate system, respectively.

[0027] Due to the change of the relative rotation angle, the azimuth angle of the antenna will also change when the pitch angle changes. After the telescopic structure is telescopically adjusted, the direction of the antenna output beam is the initial adjustment rotation direction, and its azimuth angle is not the required azimuth angle. Therefore, the azimuth rotation structure is controlled to rotate the antenna as a whole, and the azimuth angle of the beam is adjusted to the target angle, so that the direction of the antenna output beam changes from the initial adjustment rotation direction to the target output direction, thereby completing the adjustment of the beam pointing. Among them, the initial adjustment rotation direction can be the direction of the antenna after the telescopic structure of the antenna performs the first adjustment according to the direction positioning instruction to determine the pitch angle and the relative rotation angle. The target output direction can be the direction of the antenna after the azimuth rotation structure of the antenna performs the second adjustment according to the direction positioning instruction to determine the azimuth angle corresponding to the relative rotation angle. For example: if the satellite is at a position where the antenna pitch angle is 40 degrees and the azimuth angle is 50 degrees, the antenna needs to adjust the beam to point to the satellite. First, according to the corresponding relationship curve, it can be found that when the pitch angle is 40 degrees, the relative rotation angle between the corresponding feed dish and the radiation dish is 30 degrees, so the relative rotation angle is satisfied by adjusting the telescopic structure. After the rotation, according to the corresponding relationship curve, it can be known that the azimuth angle of the antenna is 80 degrees, which does not meet the target azimuth angle required by the satellite. Therefore, through the azimuth rotation structure, the feed dish and the radiation dish are rotated at the same time, and the azimuth angle is adjusted from 80 degrees to 50 degrees (because the feed dish and the radiation dish rotate together, the pitch angle will not change at this time), completing the entire beam adjustment process, and achieving the purpose of beam pointing to satellite communication. Figure 3 , Figure 3 It is a structural schematic diagram of a beam adjustment state in the first embodiment of the VICTS satellite communication antenna of the present invention.

[0028] It should be understood that the beam formed in space is formed by the interference of electromagnetic waves radiated by multiple antennas in space, not by the change of the radiation direction of a single antenna. That is, by changing the phase distribution state of the signal transmitted to each antenna, the direction of the beam formed by the antenna array in space can be changed.

[0029] It should be noted that the telescopic structure can accurately control the telescopic distance (angle) according to the instructions. It can use a linear electric telescopic rod or an arc-shaped electric telescopic rod. In actual application, the arc-shaped electric telescopic rod may need to be customized and developed, but it is more in line with the shape of each layer of VICTS. The linear electric telescopic rod is widely used in various scenarios of electric telescopic control. It is easier to obtain but will increase the structural area of ​​the overall horizontal plane. The telescopic structure can also be set as a motor to control the upper and lower pull rods. The motor is connected to the upper and lower pull rods through gears, and the two ends of the two pull rods are connected to the antenna feed plate and the radiation plate respectively. When the motor rotates clockwise, the two pull rods extend to both ends, and the relative rotation angle of the corresponding feed plate and the radiation plate increases. When the motor rotates counterclockwise, the two pull rods shorten to both ends, and the relative rotation angle of the corresponding feed plate and the radiation plate decreases. The purpose of controlling the antenna beam can also be achieved by controlling the forward and reverse rotation of the motor. In this scheme, the arc-shaped electric telescopic rod is used to illustrate the distance. There are many specific schemes for realizing the performance of the telescopic structure, which are not limited in detail.

[0030] In this embodiment, the VICTS satellite communication antenna includes: an azimuth rotation structure, an antenna feed dish and an antenna radiation dish arranged in sequence from bottom to top; a telescopic structure is arranged between the antenna feed dish and the antenna radiation dish; the telescopic structure is used to receive an input direction positioning instruction, and to telescope according to the direction positioning instruction to adjust the relative rotation angle between the antenna feed dish and the antenna radiation dish, so that the direction of the antenna output beam is the initial adjustment rotation direction; the azimuth rotation structure is used to receive the direction positioning instruction, and to drive the antenna feed dish and the antenna radiation dish to rotate together according to the direction positioning instruction to adjust the direction of the antenna output beam from the initial adjustment rotation direction to the target output direction; the antenna feed dish is used to convert the input high-frequency electromagnetic signal into a linear feed source signal, and radiate the linear feed source signal to the external space through the antenna radiation dish according to the target output direction. The telescopic drive structure can control the relative rotation angle of the feed dish and the radiation dish, and the corresponding antenna beam can perform large-angle scanning in the pitch plane, while the azimuth rotation structure can control the entire antenna feed dish and the antenna radiation dish to rotate together within 360 degrees in the azimuth plane, thereby adjusting the azimuth angle of the antenna beam. The relative rotation angle and the common rotation angle of the antenna feed dish and the antenna radiation dish are controlled separately, which greatly simplifies the antenna beam control method and improves the beam control accuracy and beam pointing stability.

[0031] Reference Figure 4 , Figure 4 FIG. 2 is a schematic diagram of an exploded structure of a second embodiment of a VICTS satellite communication antenna according to the present invention. Figure 4 As shown, in this embodiment, the same or similar contents as those in the first embodiment can be referred to the above description and will not be described in detail later. The VICTS satellite communication antenna comprises: a line source conversion structure 21 and a feed disk main structure 22; the line source conversion structure 21 is arranged on a side close to the azimuth rotation structure 1, and the feed disk main structure 22 is arranged on a side close to the antenna radiation disk 3.

[0032] It should be noted that the line source conversion structure 21 can be used to convert the high-frequency electromagnetic signal fed into the waveguide port into a linear feed signal, and transmit the linear feed signal to the feed disk main structure 22; the feed disk main structure 22 can be used to receive the linear feed signal into the internal cavity, and radiate the linear feed signal in the internal cavity to the external space through the antenna radiation disk 3.

[0033] Furthermore, a first ball layer 23 is provided between the antenna feed plate 2 and the antenna radiation plate 3 , wherein the first ball layer 23 includes a plurality of round balls to facilitate relative rotational movement between the antenna feed plate 2 and the antenna radiation plate 3 .

[0034] In a possible implementation, the telescopic structure 4 is an arc-shaped electrically controlled telescopic rod; the telescopic structure 4 further includes: a first pin structure 41 and a second pin structure 42 arranged at both ends of the arc-shaped electrically controlled telescopic rod; the arc-shaped electrically controlled telescopic rod is connected to the antenna feeding plate 2 through the first pin structure 41, and the arc-shaped electrically controlled telescopic rod is connected to the antenna radiation plate 3 through the second pin structure 42. The telescopic structure 4 also plays a role in fixing the relative positions of the antenna feeding plate 2 and the antenna radiation plate 3.

[0035] It should be understood that a plurality of arc-shaped electrically controlled telescopic rods may be provided in the telescopic structure 4 to jointly control the relative movement between the antenna feed plate 2 and the antenna radiation plate 3. For example, within a 360-degree horizontal rotation range, three sets of telescopic rods are used to control the relative rotation movement between the two layers of the plate, and the three sets of structures are spaced 120 degrees apart from each other. This design can make the two layers of the plate more stable.

[0036] Reference Figure 5 , Figure 5The schematic diagram of the cross-section of the structure of the second embodiment of the VICTS satellite communication antenna of the present invention is shown in FIG. The middle part of the azimuth rotation structure 1 is provided with a circular through hole to facilitate the installation of the waveguide rotation joint. The line source conversion structure 21 also includes: a waveguide rotation joint 21a; the waveguide rotation joint 21a is connected to the waveguide port of the line source conversion structure 21 through the circular through hole, which can ensure that the high-frequency electromagnetic signal can always be stably fed into the line source conversion structure 21 during the rotation of the azimuth plane.

[0037] It should be understood that the high-frequency electromagnetic signal enters from the waveguide rotating joint 21a of the line source conversion structure 21, passes through the 1-to-N cavity-type power splitting network, forms a high-frequency electromagnetic field (i.e., the above-mentioned linear feed source signal) with nearly equal amplitude and phase, and reaches the coupling position 21b. A coupling gap 22a of appropriate size is opened at the position corresponding to the coupling position 21b of the line source conversion structure above and below the main structure of the feed disk 22, and the interior of the main structure of the feed disk is a circular cavity 22b. The high-frequency electromagnetic field propagated to the coupling position 21b of the line source conversion structure passes through the coupling gap 22a and enters the cavity 22b for propagation.

[0038] Furthermore, the antenna radiation plate 3 includes: a first slot structure 31, a second slot structure 32 and a third slot structure 33 arranged in sequence from bottom to top, and the three-layer structure can be fixed together by a plurality of screws 34. The width of the slot in the first slot structure 31 is narrower than the width of the slot in the second slot structure 32; the number of slots in the third slot structure 33 is twice the number of slots in the first slot structure 31, forming a plurality of radiation pairs respectively. Each layer of the antenna radiation plate can be processed separately, and the structure is simple, and laser cutting and punching can be used. Finally, the three layers are combined together to realize the design of the radiation plate, which is easy to process and has low cost.

[0039] In a possible implementation, the electromagnetic field energy enters from the slot 35a of the first slot structure 31 of the feed plate, passes through the wider slot of the second slot structure 32, and is transmitted to the two slots 35b and 35c at the corresponding position of the third slot structure 33, and radiates to the external free space, and 35a, 35b and 35c form a 1:2 radiation pair. Several such radiation pairs in the antenna feed plate 3 can efficiently radiate the energy of the high-frequency electromagnetic field propagating in the cavity 22b of the antenna feed plate 2, forming a high-gain antenna beam.

[0040] It should be noted that when the radiation slot 35a of the antenna feed disk 3 and the coupling slot 22a of the antenna feed disk 2 are parallel to each other, the amplitude and phase of the high-frequency signal radiated by the feed disk slot are in a distribution state, forming a directional beam. When the radiation disk rotates a certain angle relative to the feed disk, the radiation slot 35a of the antenna feed disk 3 and the coupling slot 22a of the antenna feed disk 2 are no longer parallel to each other, but have a certain angle. At this time, the amplitude and phase of the high-frequency signal radiated by the feed disk slot are in another distribution state, forming another directional beam. Since the beam formed in space is formed by the interference of electromagnetic waves radiated by multiple antennas in space, it is not that the radiation direction of a single antenna has changed. That is, by changing the phase distribution state of the signal transmitted to each antenna, the direction of the beam formed by the antenna array in space can be changed. Each slot on the antenna radiation disk in the VICTS antenna is an antenna unit, and multiple slots are multiple antenna units. The change in the phase state between them is achieved by rotating the feed disk. When the feed plate rotates by one angle, the signal phase of each slot radiation is distributed, which corresponds to the direction of the high-gain interference beam formed by the interference of electromagnetic waves emitted by multiple slots in space. Therefore, by controlling the relative rotation angle of the feed plate and the radiation plate to change the signal phase of each radiation slot of the feed plate, the direction of the antenna beam can be controlled.

[0041] Reference Figure 6 , Figure 6 FIG. 2 is a schematic diagram of the structure of the third embodiment of the VICTS satellite communication antenna of the present invention. The third embodiment of the VICTS satellite communication antenna of the present invention is proposed based on the above embodiments. Figure 3 As shown, in this embodiment, the same or similar contents as those in the first embodiment and the second embodiment can be referred to the above introduction and will not be described in detail later.

[0042] In satellite communications, the polarization direction of satellite signals is usually fixed, generally including linear polarization (vertical / horizontal polarization) and circular polarization (left-hand / right-hand polarization). The polarization of the VICTS antenna mainly depends on the direction of the radiation slot of the antenna radiation dish. In the process of adjusting the beam, the antenna radiation dish will rotate arbitrarily, causing the linear polarization direction to change. In this case, if the received satellite signal is circularly polarized, it will not have much impact, because the linear polarization antenna can receive circularly polarized signals. If the received satellite signal is also linearly polarized, the reception effect is best when the polarization is aligned. If the polarization of the satellite signal is perpendicular to the polarization direction of the antenna, the signal reception effect will be greatly reduced.

[0043] To solve the above problems, the VICTS satellite communication antenna may also include: a polarization matching disk 5 and a polarization adjustment structure 6; the polarization matching disk 5 is arranged on the side of the antenna radiation disk 3 away from the antenna feeding disk 2; the polarization adjustment structure 6 is arranged between the antenna radiation disk 3 and the polarization matching disk 5; the polarization adjustment structure 6 is used to receive the input polarization positioning instruction, and adjust the polarization direction between the antenna radiation disk 3 and the communication satellite according to the polarization positioning instruction.

[0044] In a possible implementation, the polarization adjustment structure 6 is an arc-shaped electrically controlled telescopic rod; the polarization adjustment structure 6 also includes: a third pin structure 61 and a fourth pin structure 62 arranged at both ends of the arc-shaped electrically controlled telescopic rod; the arc-shaped electrically controlled telescopic rod is connected to the antenna radiation disk 3 through the third pin structure 61, and the arc-shaped electrically controlled telescopic rod is connected to the polarization matching disk 5 through the fourth pin structure 62. Similar to the above-mentioned telescopic structure, the polarization adjustment structure 6 can also adopt a variety of different schemes that can achieve the performance of the telescopic structure, which are not limited in detail. A second ball layer can also be provided between the antenna radiation disk 3 and the polarization matching disk 5, and the second ball layer contains a plurality of round balls to facilitate the relative rotational movement between the antenna radiation disk 3 and the polarization matching disk 5.

[0045] It should be noted that after the antenna radiation disk rotates, the polarization matching disk 5 can be adjusted to rotate through the polarization positioning instruction so that the polarization direction of the VICTS antenna matches the polarization direction of the satellite signal.

[0046] In some designs, the polarization matching disk can be divided into an upper polarization layer and a lower polarization layer (not shown in the figure) to achieve a more complex polarization adjustment function. This embodiment only shows the application of one polarization layer.

[0047] In addition, in order to achieve the above-mentioned purpose, an embodiment of the present invention also proposes a satellite communication system. Since this satellite communication system includes the above-mentioned VICTS satellite communication antenna, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0048] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

[0049] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0051] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A VICTS satellite communication antenna, characterized in that: The VICTS satellite communication antenna comprises: an azimuth rotation structure, an antenna feed plate and an antenna radiation plate arranged in sequence from bottom to top; A telescopic structure is provided between the antenna feeding plate and the antenna radiation plate; The telescopic structure is used to receive an input direction positioning instruction, and to telescope according to the direction positioning instruction to adjust the relative rotation angle between the antenna feeding plate and the antenna radiation plate, so that the direction of the antenna output beam is the initial adjustment rotation direction; The azimuth rotation structure is used to receive the direction positioning instruction, and drive the antenna feed plate and the antenna radiation plate to rotate together according to the direction positioning instruction to adjust the direction of the antenna output beam from the initial adjustment rotation direction to the target output direction; The antenna feed plate is used to convert the input high-frequency electromagnetic signal into a linear feed signal, and radiate the linear feed signal to the external space through the antenna radiation plate according to the target output direction.

2. The VICTS satellite communication antenna according to claim 1, characterized in that: The antenna feed plate comprises: a line source conversion structure and a feed plate main body structure; The line source conversion structure is arranged on a side close to the azimuth rotation structure, and the feeding disk main body structure is arranged on a side close to the antenna radiation disk; The line source conversion structure is used to convert the high-frequency electromagnetic signal fed into the waveguide port into a linear feed source signal, and transmit the linear feed source signal to the feed disk main structure; The feeding disk main body structure is used to receive the linear feed source signal into the internal cavity, and radiate the linear feed source signal in the internal cavity to the external space through the antenna radiation disk.

3. The VICTS satellite communication antenna according to claim 2, characterized in that: A circular through hole is provided in the middle part of the azimuth rotation structure, and the line source conversion structure further comprises: a waveguide rotation joint; The waveguide rotating joint is connected to the waveguide port of the line source conversion structure through the circular through hole to feed the high-frequency electromagnetic signal into the line source conversion structure.

4. The VICTS satellite communication antenna according to claim 3, characterized in that: The antenna radiation plate comprises: a first slot structure, a second slot structure and a third slot structure arranged in sequence from bottom to top; The width of the slits in the first slit structure is narrower than the width of the slits in the second slit structure; The number of slots in the third slot structure is twice the number of slots in the first slot structure.

5. The VICTS satellite communication antenna according to claim 1, characterized in that: The VICTS satellite communication antenna further comprises: a first ball bearing layer; The first ball bearing layer is arranged between the antenna feeding plate and the antenna radiation plate.

6. The VICTS satellite communication antenna according to claim 5, characterized in that: The telescopic structure is a first arc-shaped electrically controlled telescopic rod; the telescopic structure further comprises: a first pin structure and a second pin structure arranged at two ends of the first arc-shaped electrically controlled telescopic rod; The first arc-shaped electrically-controlled telescopic rod is connected to the antenna feeding plate through the first pin structure, and the first arc-shaped electrically-controlled telescopic rod is connected to the antenna radiation plate through the second pin structure.

7. The VICTS satellite communication antenna according to claim 1, characterized in that: The VICTS satellite communication antenna also includes: a polarization matching plate and a polarization adjustment structure; The polarization matching disk is arranged on a side of the antenna radiation disk away from the antenna feeding disk; The polarization adjustment structure is arranged between the antenna radiation plate and the polarization matching plate; The polarization adjustment structure is used to receive an input polarization positioning instruction and adjust the polarization direction between the antenna radiation dish and the communication satellite according to the polarization positioning instruction.

8. The VICTS satellite communication antenna according to claim 7, characterized in that: The polarization adjustment structure is a second arc-shaped electrically controlled telescopic rod; the polarization adjustment structure further comprises: a third pin structure and a fourth pin structure arranged at two ends of the second arc-shaped electrically controlled telescopic rod; The second arc-shaped electrically-controlled telescopic rod is connected to the antenna radiation disk through the third pin structure, and the second arc-shaped electrically-controlled telescopic rod is connected to the polarization matching disk through the fourth pin structure.

9. The VICTS satellite communication antenna according to claim 8, characterized in that: The VICTS satellite communication antenna further comprises: a second ball bearing layer; The second ball bearing layer is arranged between the antenna radiation disk and the polarization matching disk.

10. A communication system, characterized in that: The communication system comprises the VICTS satellite communication antenna according to any one of claims 1 to 9.

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