Variable-aperture satellite antenna device

Abstract

The utility model belongs to the technical field of satellite communication, and provides a variable-aperture satellite antenna device, which is characterized in that an adjustable antenna panel comprises a main lobe surface and an auxiliary lobe surface; the main petal surface is connected with the base through a rotating shaft, and the auxiliary petal surfaces are buckled on the two sides of the main petal surface respectively; the feed source is connected with the base through a connecting rod, and the receiving and transmitting end of the feed source faces the adjustable antenna panel; the front end of the receiving and transmitting end of the feed source is provided with a wave-transparent mirror used for changing the radiation angle. According to the utility model, the adjustable antenna panel is respectively arranged to be the main lobe surface and the auxiliary lobe surface, the main lobe surface or the combination of the main lobe surface and the auxiliary lobe surface is used according to actual conditions, when only the main lobe surface works, the receiving area is small, so that the signal receiving capability is relatively weak, and the wave-transparent mirror is arranged to change the radiation angle, so that the signal receiving capability is improved. Therefore, the radiation intensity when only the main lobe surface works is enhanced, the antenna performance is improved, and the side lobe characteristic requirement of a small-caliber antenna is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of satellite communications, and in particular relates to a satellite antenna device with a variable caliber. Background Art

[0002] With the increasing demand for domestic emergency and mass incident handling, the need for social rescue missions by emergency departments such as fire fighting, and the advantages of satellite communication equipment in handling emergency incidents, portable satellite communication systems have been widely used.

[0003] In satellite communication systems, antenna performance directly affects the quality of signal reception and transmission. Antenna gain is one of the important indicators to measure antenna performance. It is the ratio of the power density of the signal generated by the actual antenna and the ideal radiating unit at the same point in space under the condition of equal input power. Usually, satellite antenna gain is related to the equivalent aperture of the antenna surface. The larger the equivalent aperture, the larger the receiving area and the greater the antenna gain. The signal values ​​that satellite antennas can receive in different regions are different. Small-aperture antennas will not be able to work properly in areas with low signal values. Therefore, by increasing the antenna aperture, the signal receiving area will increase, thereby increasing the antenna gain and improving the antenna performance, so that it can be used normally in areas with low signal values.

[0004] At the same time, in the field of satellite communications, the D / λ (ratio of aperture to wavelength) of small-aperture antennas is usually small, which means that their sidelobe characteristics may cause interference to other nearby satellites. In order to protect nearby satellites from being disturbed by the off-axis radiation of the antenna and ensure the stable operation of the entire satellite network, the sidelobe characteristics of small-aperture antennas need to meet a series of regulations and standards.

[0005] How to quickly adjust the portable satellite antenna according to the actual situation on site has become an important task in emergency rescue, emergency response and various communication guarantees. The installation steps of the spliced ​​petal portable antenna on the market are complicated, and the antenna diameter is fixed and cannot be changed, which causes inconvenience in installation and use. Utility Model Content

[0006] In order to overcome the problems existing in the prior art, the purpose of the utility model is to provide a satellite antenna device with a variable aperture.

[0007] The utility model adopts the following technical solutions to solve the technical problems: a base, an adjustable antenna panel and a feed source; the adjustable antenna panel includes a main lobe surface and a side lobe surface; the main lobe surface is connected to the base rotating shaft, and the side lobe surfaces are installed on both sides of the main lobe surface; the feed source is connected to the base through a connecting rod, and the transceiver end of the feed source faces the adjustable antenna panel; a wave-transmitting mirror for changing the radiation angle is arranged at the front end of the transceiver end of the feed source, and the wave-transmitting mirror faces the main lobe surface.

[0008] Its main working principle is that, in actual use, the aperture of the adjustable antenna panel can be adjusted as needed, specifically by installing or removing the second lobe and the third lobe on both sides of the main lobe. In the process of changing the aperture of the adjustable antenna panel, since the radiation angle of the feed source will not change due to the change in the aperture of the adjustable antenna panel, it is also necessary to install a wave-transmitting mirror in front of the feed transceiver when only the main lobe is working, so as to change the radiation angle of the feed source and enhance the radiation intensity when only the main lobe is working.

[0009] Preferably, the main lobe surface includes a first lobe surface, and the secondary lobe surface includes a second lobe surface and a third lobe surface;

[0010] The first petal surface is connected to the base rotating shaft, and the second petal surface and the third petal surface are respectively buckled on both sides of the first petal surface.

[0011] Preferably, it comprises a fixing plate; the feed source is mounted on one side of the fixing plate, the wave-transmitting mirror is mounted on the other side of the fixing plate, and the feed source and the wave-transmitting mirror are connected to the connecting rod shaft via the fixing plate.

[0012] Preferably, the fixed plate includes a main board and a sub-board; the feed source is installed on the main board, and the waveguide is installed on the sub-board; a slot is provided in the middle of the main board, positioning slots are provided on both sides of the slot, and positioning strips are provided on both sides of the sub-board, and the sub-board is inserted into the positioning slot through the positioning strip to cooperate with the main board.

[0013] Preferably, both ends of the fixing plate are provided with first rotating holes, the end of the connecting rod is provided with a second rotating hole that cooperates with the first rotating hole, and the first rotating hole and the second rotating hole are fixedly matched by a screw.

[0014] Preferably, a circular groove is provided on the periphery of the second rotating hole with the second rotating hole as the center, and limiting parts are provided on both sides of the first rotating hole, the limiting parts cooperate with the circular groove, and the limiting parts rotate along the circular groove.

[0015] Preferably, bayonet holes are provided on both sides of the main flap surface, and the main flap surface is connected and cooperated with the second flap surface and the third flap surface through the bayonet holes.

[0016] Preferably, it further comprises a lifting rod; one end of the lifting rod is connected to the connecting rod, and the other end of the lifting rod is connected to the base, and the lifting rod can push the connecting rod to lift or lower.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] By setting the adjustable antenna panel into a main lobe and a side lobe respectively, and using the main lobe or a combination of the main lobe and the side lobe according to actual conditions, the aperture of the adjustable antenna panel can be adjusted. At the same time, when only the main lobe is working, its receiving area is small, resulting in relatively weak signal receiving capability. For this reason, a wave-transmitting mirror for changing the radiation angle is arranged at the front end of the transceiver end of the feed source, thereby enhancing the radiation intensity when only the main lobe is working, improving the antenna performance, and at the same time, meeting the side lobe characteristic requirements of small-aperture antennas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the variable aperture satellite antenna in a state of installing a larger aperture;

[0021] Figure 2 A schematic diagram of a variable aperture satellite antenna in a small aperture state;

[0022] Figure 3 for Figure 2 Part A partial schematic diagram;

[0023] Figure 4 for Figure 2 Part B partial schematic diagram;

[0024] Figure 5 Schematic diagram of the feed source irradiation range;

[0025] Figure 6 Schematic diagram of the illumination range of the feed source and wave-transmitting mirror combination.

[0026] 1. Base; 2. Adjustable antenna panel; 20. First petal; 21. Second petal; 22. Third petal; 24. Bayonet; 3. Feed source; 4. Wave-transmitting mirror; 5. Fixing plate; 50. Main board; 51. Sub-board; 52. Slot; 53. Positioning groove; 54. Positioning strip; 55. First rotating hole; 56. Limiting part; 6. Connecting rod; 60. Second rotating hole; 61. Circular groove; 7. Lifting rod. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned purposes, features and advantages of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the utility model, and the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] This solution specifically discloses a satellite antenna device with a variable aperture, such as Figure 1-Figure 6 As shown, it includes a base 1, an adjustable antenna panel 2 and a feed source 3. The adjustable antenna panel 2 is connected to the base 1 through a rotating shaft, and the feed source 3 is connected to the base 1 through a connecting rod 6. Therefore, when stored, the feed source 3 and the adjustable antenna panel 2 are stored by interlocking with each other, reducing the volume occupied by storage. When work is needed, the variable-caliber satellite antenna device is taken out, and the adjustable antenna panel 2 and the feed source 3 are unfolded to enter the working state.

[0030] At the same time, according to actual conditions, the adjustable antenna panel 2 uses a combination of a main lobe and a side lobe, and in this embodiment, the first lobe 20 or a combination of the first lobe 20, the second lobe 21 and the third lobe 22 is used. Of course, the total number of the main lobe and the side lobe is not limited to three. Specifically, under normal conditions, such as Figure 1 As shown, the first petal surface 20, the second petal surface 21 and the third petal surface 22 need to be assembled and installed to form a reflection surface with a larger diameter to reflect signals in a larger area; in an emergency, in order to save time, such as Figure 2 As shown, in the state where the second petal surface 21 and the third petal surface 22 are not assembled, only the first petal surface 20 is unfolded to start working. The present application achieves the change of the caliber by increasing or decreasing the petal surface in this way.

[0031] At the same time, Figure 5As shown in the figure, the solid line area is the reflection area of ​​the adjustable antenna panel 2, and the dotted line area is the area without the corresponding adjustable antenna panel 2, which means that when the aperture of the adjustable antenna panel 2 is reduced, the radiation angle of the feed source 3 will not change, so the irradiation range of the feed source 3 will exceed the reflection surface of the adjustable antenna panel 2. The dotted line area has no corresponding adjustable antenna panel 2, resulting in reduced radiation intensity. Figure 6 As shown, a wave-transmitting mirror 4 needs to be installed at the front end of the feed source 3, so as to enhance the radiation intensity when only the main lobe is working, improve the antenna performance, and meet the side lobe characteristic requirements of small-aperture antennas.

[0032] In some optional embodiments, a fixing plate 5 is provided, and the feed source 3 and the wave mirror 4 are respectively mounted on both sides of the fixing plate 5, and the feed source 3 and the wave mirror 4 are connected to the rotating shaft of the connecting rod 6 through the fixing plate 5, so as to fix the feed source 3 and the wave mirror 4.

[0033] In some optional embodiments, such as Figure 3 As shown, the fixing plate 5 includes a main board 50 and a sub-board 51; the feed source 3 is mounted on the main board 50, and the wave mirror 4 is mounted on the sub-board; a slot 52 is provided in the middle of the main board 50, and positioning slots 53 are provided on both sides of the slot 52, and positioning bars 54 are provided on both sides of the sub-board 51, and the sub-board 51 is inserted into the positioning slots 53 through the positioning bars 54 to cooperate with the main board 50. During use, when the wave mirror 4 is not needed, the sub-board 51 with the wave mirror 4 installed is taken out along the slot 52 and away from the main board 50, thereby realizing the separation of the wave mirror 4 and the feed source 3; when the wave mirror 4 is needed, the sub-board 51 with the wave mirror 4 installed is inserted into the main board 50 along the slot 52, thereby realizing the installation of the wave mirror 4 and the feed source 3. In this way, the wave mirror 4 can be quickly disassembled or installed, which greatly improves the convenience of operation.

[0034] In some optional embodiments, first rotating holes 55 are provided at both ends of the fixing plate 5, and second rotating holes 60 are provided at the end of the connecting rod 6 to cooperate with the first rotating holes 55. The first rotating holes 55 and the second rotating holes 60 are fixed together by screws. By loosening the screws, the direction of the fixing plate 5 can be adjusted along the first rotating holes 55 and the second rotating holes 60; when the adjustment is completed, the screws are locked to complete the adjustment of the direction of the fixing plate 5.

[0035] In some optional embodiments, such as Figure 4 As shown, in order to allow the fixing plate 5 to rotate smoothly, a circular groove 61 is provided on the periphery of the second rotating hole 60 with the second rotating hole 60 as the center, and limiting portions 56 are provided on both sides of the first rotating hole 55. The limiting portions 56 cooperate with the circular groove 61, and the limiting portions 56 rotate along the circular groove 61. The circular groove 61 guides the limiting portions 56, thereby further improving the stability of the rotation.

[0036] In some optional embodiments, bayonet holes 24 are provided on both sides of the first flap surface 20 , and the first flap surface 20 is connected and matched with the second flap surface 21 and the third flap surface 22 through the bayonet holes 24 .

[0037] In some optional embodiments, a lifting rod 7 is further included; one end of the lifting rod 7 is connected to the connecting rod 6, and the other end of the lifting rod 7 is connected to the base 1, and the lifting rod 7 can push the connecting rod 6 to rise or fall.

[0038] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A satellite antenna device with a variable aperture, characterized in that: include: Base, adjustable antenna panel and feed; The adjustable antenna panel includes a main lobe surface and a side lobe surface; The main lobe surface is connected to the base shaft, and the secondary lobe surfaces are installed on both sides of the main lobe surface. The feed source is connected to the base through a connecting rod, and the transmitting and receiving end of the feed source faces the adjustable antenna panel; A wave-transmitting mirror for changing the radiation angle is arranged at the front end of the transceiver end of the feed source, and the wave-transmitting mirror faces the main lobe surface.

2. The variable aperture satellite antenna device according to claim 1, characterized in that: The main lobe surface includes a first lobe surface, and the secondary lobe surface includes a second lobe surface and a third lobe surface; The first petal surface is connected to the base rotating shaft, and the second petal surface and the third petal surface are respectively buckled on both sides of the first petal surface.

3. The variable aperture satellite antenna device according to claim 1, characterized in that: Includes fixing plate; The feed source is installed on one side of the fixed plate, and the wave-transmitting mirror is installed on the other side of the fixed plate. The feed source and the wave-transmitting mirror are connected to the connecting rod shaft through the fixed plate.

4. The variable aperture satellite antenna device according to claim 3, characterized in that: The fixed plate includes a main plate and a sub-plate; The feed source is installed on the main board, and the wave-transmitting mirror is installed on the sub-board; a slot is provided in the middle of the main board, positioning slots are provided on both sides of the slot, and positioning strips are provided on both sides of the sub-board. The sub-board is inserted into the positioning slot through the positioning strips to cooperate with the main board.

5. The variable aperture satellite antenna device according to claim 3, characterized in that: The two ends of the fixing plate are provided with first rotating holes, the end of the connecting rod is provided with a second rotating hole that matches with the first rotating hole, and the first rotating hole and the second rotating hole are fixedly matched by a screw.

6. The variable aperture satellite antenna device according to claim 5, characterized in that: A circular groove is arranged around the second rotating hole with the second rotating hole as the center. Limiting parts are arranged on both sides of the first rotating hole. The limiting parts cooperate with the circular groove and rotate along the circular groove.

7. The variable aperture satellite antenna device according to claim 2, characterized in that: Bayonet holes are provided on both sides of the main flap surface, and the main flap surface is connected and matched with the second flap surface and the third flap surface through the bayonet holes.

8. The variable aperture satellite antenna device according to claim 2, characterized in that: Also includes lifting rod; One end of the lifting rod is connected to the connecting rod, and the other end of the lifting rod is connected to the base. The lifting rod can push the connecting rod to lift or descend.

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