A large aperture movable antenna of lift type multi-frequency feed change

Abstract

The application discloses a lifting type multi-frequency feed change type large-diameter movable antenna and belongs to the technical field of antennas. The antenna is composed of a lifting mechanism, a servo turntable, a reflector and a multi-frequency band feed source network and the like. Each part is a small-size module unit, can be quickly erected and withdrawn and replaced at a work site. The lifting mechanism is in an inner-outer double-layer cylindrical form, realizes the lifting of the antenna through a telescopic structure and completes the erection, withdrawal and replacement of the feed source and the like of the antenna. The servo turntable adopts an azimuth-elevation structure form and realizes the tracking and pointing of the antenna. The application has the multi-frequency feed change function, widens the working frequency range of the antenna and has high gain electrical performance due to the large-diameter reflector. The movable antenna has good application value in the fields of satellite communication, microwave scattering communication, measurement and control investigation and the like.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to a lift-up multi-frequency switching type large-aperture portable antenna that can realize functions such as satellite communication, microwave scattering communication, telemetry and reconnaissance. Background Technology

[0002] A portable antenna is a detachable communication antenna that can be quickly set up and dismantled, allowing for relocation. To achieve higher data transmission capabilities, a larger antenna aperture is required, necessitating a large-aperture portable antenna solution. However, existing large-aperture portable antennas generally present the following technical challenges:

[0003] 1. The antenna's reflector, mount, and other overall dimensions are large, and the antenna height exceeds the height of a human body, making antenna installation, dismantling, and feed switching operations difficult.

[0004] 2. The antenna has a limited operating frequency range.

[0005] 3. The antenna module has a large storage volume, making transportation difficult. Summary of the Invention

[0006] In view of this, the present invention proposes a lift-up multi-frequency switch-feed type large-aperture portable antenna. It can be quickly connected and disassembled, and has a small envelope volume, making it easy to set up and transport.

[0007] The technical solution provided by this invention is:

[0008] A liftable multi-frequency switch-feed large-aperture portable antenna includes a base assembly and a reflector assembly;

[0009] The base assembly mainly consists of support legs 2, lifting mechanism 1, seat frame mechanism 3, and push rod mechanism 4; wherein, the bottom edge of the lifting mechanism is connected to multiple horizontally arranged support legs, and the middle position of the support legs is connected to the outer cylinder of the lifting mechanism through a support rod 8; the seat frame mechanism 3 is located at the top of the inner cylinder of the lifting mechanism, and the push rod mechanism is connected to one side of the seat frame mechanism.

[0010] The reflective assembly mainly consists of a main reflective surface 5, a feed network 6, and a secondary reflective surface 7. The main reflective surface is installed on the top of the frame structure, and the secondary reflective surface is connected to the center of the main reflective surface through the feed network. The central axes of the main reflective surface 5, the feed network 6, and the secondary reflective surface 7 coincide.

[0011] Furthermore, the support leg is mainly composed of a front section 43, a rear section 46, and a leveling foot 47 connected in sequence; the upper edges of the front and rear sections are hinged by a folding shaft 44, and the lower edges are locked and disassembled by a support leg quick-release pin 45; the connecting surface of the front section 23 is provided with an L-shaped groove 41 and a pin hole 42; the extending direction of the L-shaped groove 41 and the pin hole 42 is parallel to the central axis of the folding shaft.

[0012] Furthermore, the lifting mechanism mainly consists of a base 11, an outer cylinder 12, and an inner cylinder 13; the outer cylinder is fixedly connected to the top of the base, and the inner cylinder is constrained inside the outer cylinder and can slide along the central axis of the outer cylinder.

[0013] The main body of the base is a base frame 22, and multiple pin supports 24 are evenly distributed in the circumferential direction of the base frame 22; each pin support is provided with a cylindrical pin 23 on the upper side and a quick-release pin 25 on the lower side, wherein the cylindrical pin 23 corresponds one-to-one with the L-shaped slot 41, and the pin hole 42 corresponds one-to-one with the quick-release pin 25.

[0014] The outer cylinder 12 and the inner cylinder 13 are connected by a linear guide rail 31, which is used to prevent the outer cylinder 12 and the inner cylinder 13 from rotating relative to each other. A lifting drive mechanism 33 is provided at the bottom of the outer cylinder 12. The output end of the lifting drive mechanism is connected to a lifting screw 32, which is threaded to the bottom of the inner cylinder. The bottom end of the lifting screw is connected to the bottom bearing of the outer cylinder.

[0015] The outer cylinder 12 has a lifting operation hole 21 on one side of its bottom. The main body of the lifting drive mechanism is a reduction mechanism 34. The input end of the reduction mechanism is connected to the lifting operation hole, and the output end is connected to the lifting screw and drives the lifting screw to rotate.

[0016] Furthermore, the linear guide 31 is provided with four sets, and the lifting screw is located at the center of the four sets of linear guides.

[0017] Furthermore, the frame mechanism 3 shown mainly consists of a turntable chassis 51, an orientation drive motor 52, and a worm gear assembly 53; wherein, the turntable chassis 51 is fixedly installed on the top of the inner cylinder;

[0018] The azimuth drive motor and the worm gear assembly are both located on the turntable chassis. The upper surface of the turntable chassis is provided with an azimuth turntable, which is connected to the turntable chassis bearing. The azimuth drive motor 52 drives the worm gear assembly 53 to rotate, which in turn drives the upper azimuth turntable 54 to rotate, thereby realizing the azimuth rotation of the antenna.

[0019] Furthermore, the push rod mechanism includes a pitch turntable 58, a pitch drive support, and a pitch screw 63;

[0020] The pitch turntable is hinged to the azimuth turntable via pitch lugs; the azimuth turntable has a lead screw mounting hole 55 on its rear side, and the pitch drive support is hinged to the lead screw mounting hole via lead screw lugs 65 on both sides of its top; the pitch drive support is also equipped with a pitch motor 61, a pitch reducer 62 and a pitch nut, the pitch motor 61 further drives the pitch nut to rotate through the pitch reducer, and the pitch lead screw located on the pitch drive support is threadedly connected to the pitch nut, and the rotation of the pitch nut drives the extension and retraction of the pitch lead screw;

[0021] The pitch turntable has a pitch hinge hole 59 on its back side, which is connected to a ball joint 64 on the top of the pitch screw.

[0022] Furthermore, a screw cap 56 is provided at the top of the screw mounting hole to provide support and constraint for the pitch drive.

[0023] Furthermore, the strut has a crossbar 49 in the middle and ball joints 50 at both ends. The strut is used to achieve the diagonal reinforcement of the lifting mechanism.

[0024] Furthermore, the main reflective surface is mainly composed of a central body 71, an inner ring panel 72, and an outer ring panel 73. The inner ring panel 72 is positioned and connected by positioning pins and locking pins, and the outer ring panel is connected by locking fasteners. The central body, inner ring panel, and outer ring panel are all made of carbon fiber honeycomb sandwich material.

[0025] Furthermore, the feed network is connected and fixed by a positioning stop that mates with the inner hole of the central body and a non-removable screw.

[0026] The feed network has evenly distributed quick-release screws 76 at the bottom circumference to connect with the center body of the main reflector; the feed network has handles 77 at the bottom and top for easy feed replacement, the middle part is the network assembly and the top is the feed assembly 79;

[0027] The bottom of the sub-reflector is connected to the top of the feed network by a clamping ring 81. The clamping ring is equipped with a clamping screw in the middle for tightening and loosening the clamp. The sub-reflector is a shaped rotary surface, which is supported and positioned by four sets of sub-surface support rods 83.

[0028] As can be seen from the above description, the beneficial effects of the technical solution of the present invention are as follows:

[0029] 1. The movable antenna of this invention adopts a lifting mechanism and a small-sized modular unit scheme, which solves the operational difficulties of large-aperture movable antennas;

[0030] 2. The portable antenna of this invention has multi-frequency switching function, which broadens the antenna's operating frequency range.

[0031] 3. This invention features a movable antenna and a large-aperture reflector, providing high-gain electrical performance.

[0032] 4. The various modules of the movable antenna of this invention can be quickly connected and disassembled, and the envelope volume is small, making it easy to set up and transport. Attached Figure Description

[0033] To more clearly describe this patent, accompanying drawings are provided below to assist in explaining the background technology, technical principles, and / or certain specific embodiments of this patent.

[0034] Figure 1 Antenna operating status diagram;

[0035] Figure 2 Exploded view of the antenna module;

[0036] Figure 3(a) Schematic diagram of the antenna raising action

[0037] Figure 3(b) shows a schematic diagram of the antenna descent operation;

[0038] Figure 4(a) shows the lifting state of the lifting mechanism;

[0039] Figure 4(b) shows the descent state of the lifting mechanism;

[0040] Figure 5 Lifting mechanism base diagram;

[0041] Figure 6 A partial enlarged view of the lifting operation hole;

[0042] Figure 7 Longitudinal sectional view of the lifting mechanism;

[0043] Figure 8 Diagram of the lifting mechanism drive unit;

[0044] Figure 9 A cross-sectional view of the lifting mechanism;

[0045] Figure 10 Diagram showing the outriggers in their deployed working state.

[0046] Figure 11 Image showing the legs in their stored state.

[0047] Figure 12 Diagram showing the connection status between the lifting mechanism and the outriggers.

[0048] Figure 13 Schematic diagram of the tie rod structure.

[0049] Figure 14 Diagram of the turntable assembly.

[0050] Figure 15 Structural diagram of the detachable lead screw assembly.

[0051] Figure 16 Completed antenna mount installation diagram.

[0052] Figure 17(a) Exploded view of the main reflector.

[0053] Figure 17(b) shows the assembly diagram of the main reflector.

[0054] Figure 18 Schematic diagram of multi-band feed network structure.

[0055] Figure 19 Diagram of sub-reflector composition.

[0056] Figure 20 A diagram showing the completed installation of the antenna reflector.

[0057] The labels in the diagram mean:

[0058] 1. Lifting mechanism; 2. Support leg; 3. Seat frame mechanism; 4. Push rod assembly; 5. Main reflector; 6. Feed network; 7. Secondary reflector; 8. Support rod; 11. Base; 12. Outer cylinder; 13. Inner cylinder; 21. Lifting operation hole; 22. Base frame; 23. Pin; 24. Pin lug; 25. Quick release pin; 26. Base foot; 31. Linear guide rail; 32. Lifting screw; 33. Lifting drive mechanism; 34. Reduction mechanism; 35. Screw ring; 41. Slot; 42. Pin hole; 43. Front section; 44. Folding shaft; 45. Support leg quick release pin; 46. Rear section; 47. Foot; 48. Lug; 49. Crossbar; spherical shape. 50. Hinge, turntable chassis, 51. Azimuth drive motor, 52. Worm gear assembly, 53. Azimuth turntable, 54. Screw mounting hole, 55. Screw cover, 56. Pitch lug, 57. Pitch turntable, 58. Pitch hinge hole, 59. Pitch motor, 61. Pitch reducer, 62. Pitch screw, 63. Screw hinge joint, 64. Screw lug, 65. Center body, 71. Inner ring panel, 72. Outer ring panel, 73. Base ring, 75. Quick-release screw, 76. Handle, 77. Network assembly, 78. Feed assembly, 79. Clamping ring, 81. Locking screw, 82. Secondary support rod, 83. Secondary reflector, 84. Detailed Implementation

[0059] The technical solution of this patent will be described in detail below with reference to the accompanying drawings and specific examples.

[0060] like Figure 1 The diagram shown illustrates the operating status of a lift-up multi-frequency switch-feed portable antenna. Figure 2 The image shows an exploded view of the antenna module. The antenna consists of a lifting mechanism 1, legs 2, a mount mechanism 3, a push rod assembly 4, a reflector 5, a feed network 6, a sub-reflector 7, and a pull rod 8.

[0061] Figures 3(a) and 3(b) show a comparison of the antenna's raised and lowered states. Its lifting mechanism allows for raising and lowering, enabling operations such as antenna setup, dismantling, and feed switching.

[0062] Figures 4(a) and 4(b) show the lifting and lowering states of the lifting mechanism, respectively. The lifting mechanism includes a base 11, an outer cylinder 12, and an inner cylinder 13. The antenna mount mechanism is installed on the top of the inner cylinder, and the antenna lifts and lowers as the inner cylinder extends and retracts.

[0063] like Figure 5 The diagram shows the base of the lifting mechanism. The base has base feet 26 at its bottom, and three sets of pin supports 24 are evenly distributed around the circumference of the base frame 22. Each pin support has a cylindrical pin 23 on its upper side and a quick-release pin 25 on its lower side, both used for quick connection with the support. A lifting operation hole 21 is provided at the top of the base, allowing the lifting mechanism to move up and down by rotation.

[0064] like Figure 6 The image shown is a partial enlarged view of the lifting operation hole.

[0065] like Figure 7 The figure shows a longitudinal sectional view of the lifting mechanism. The outer cylinder 12 and the inner cylinder 13 of the lifting mechanism are connected by a linear guide rail 31. A lifting drive mechanism 33 is provided at the bottom of the lifting mechanism, and a lifting screw 32 is provided at the central axis position. The lifting operation hole is connected to the lifting drive mechanism.

[0066] like Figure 8 The diagram shows the drive unit of the lifting mechanism. Its outermost part is the lifting operation hole, which connects to the reduction mechanism 34, thereby driving the lifting screw to rotate. The inner sleeve, acting as the screw nut, is threadedly connected to the lifting screw 32. By rotating the operation hole, the lifting screw is driven to rotate, thus realizing the lifting action of the lifting mechanism.

[0067] like Figure 9 The figure shows a cross-sectional view of the lifting mechanism. Four sets of linear guide rails 31 are evenly distributed along the circumference inside the lifting mechanism, and a lifting screw 32 is located at the central axis.

[0068] like Figure 10 The diagram shows the antenna legs in their deployed working state. The legs consist of a front end 43, a rear end 46, and a base 47. The top of the front end has a slot 41 and a pin hole 42, which can be quickly connected to the base of the lifting mechanism. The middle of the legs has a folding shaft 44 and a quick-release pin 45. Pulling out the quick-release pin allows the legs to be folded and stored.

[0069] like Figure 11The diagram shows the legs in their retracted state. Folding the front and rear sections together significantly reduces the size of the antenna unit module.

[0070] like Figure 12 The diagram shows the connection between the lifting mechanism and the outrigger. The slot 41 of the outrigger engages with the pin 23 of the lifting mechanism base, and the pin hole 42 of the outrigger engages with the quick-release pin 25 of the lifting mechanism base, thus achieving a stable connection between the outrigger and the lifting mechanism. The top of the lifting mechanism is provided with a lug 48 for the ball joint connection of the pull rod.

[0071] like Figure 13 The diagram shows the components of the strut. The strut has a crossbar 49 in the middle and ball joints 50 at both ends. The tie rods provide diagonal reinforcement for the lifting mechanism.

[0072] like Figure 14 The diagram shows the turntable assembly. The turntable chassis 51 is connected to the lifting mechanism. The azimuth drive motor 52 drives the worm gear assembly 53 to rotate, which in turn drives the upper azimuth turntable 54 to rotate, thus realizing the azimuth rotation of the antenna. A lead screw mounting hole 55 is provided on the rear side of the azimuth turntable for mounting the lead screw assembly. A lead screw cap 56 is provided on the top of the lead screw mounting hole to secure the lead screw assembly. A pitch turntable 58 is provided on the top of the pitch lug 57 to support the center body of the main reflector. A pitch hinge hole is provided on the back of the pitch turntable for connection with the ball joint of the lead screw assembly.

[0073] like Figure 15 The diagram shows the structure of the detachable lead screw assembly. Lead screw lugs 65 are provided on both the left and right sides of the lead screw assembly, connecting to the turntable. A pitch reducer 62 is provided at the front end of the pitch motor 61, which drives the pitch lead screw 63 to achieve telescopic movement. The top of the pitch lead screw is a lead screw hinge joint 64, which connects to the pitch hinge hole 59 of the turntable.

[0074] like Figure 16 The diagram shows the completed installation of the antenna mount. The outriggers are connected to the base of the lifting mechanism, the tie rods are used for reinforcement, the turntable is installed on top of the lifting mechanism, and the detachable lead screw assembly is connected to the turntable.

[0075] Figures 17(a) and (b) show schematic diagrams of the disassembly and assembly of the antenna's main reflector. The main reflector consists of a central body 71, an inner ring panel 72, and an outer ring panel 73. The inner ring panel is positioned and connected using a locating pin and locking pin structure, while the outer ring panel is connected using locking fasteners. The central body, inner ring panel, and outer ring panel are all made of carbon fiber honeycomb sandwich material, which has the advantages of being lightweight and having high rigidity.

[0076] like Figure 18The diagram shows a multi-band feed network. The antenna has multiple feed networks for different frequency bands. Each feed network uses a standardized mounting interface, and is connected and fixed using non-removable screws through a positioning stop that mates with the inner hole of the central body. Figure 18 The images show the Ku-band and X-band feed networks. The base ring 75 of the multi-band feed network has a standardized mounting structure and dimensions, with evenly distributed quick-release screws 76 along its circumference for connection to the center of the main reflector. Handles 77 are located at the bottom and top of the feed network for easy feed replacement; the middle section contains the network assembly, and the top section contains the feed assembly 79.

[0077] like Figure 19 The diagram shows the composition of the sub-reflector. Its bottom is a clamping ring 81, which connects to the top of the feed network. A clamping screw is located in the middle of the clamping ring for tightening and loosening the clamp. The sub-surface is a shaped rotary surface, supported and positioned by four sets of sub-surface support rods 83.

[0078] like Figure 20 The diagram shows the completed installation of the movable antenna reflector. Its feed network is installed to the center of the reflector surface using quick-release screws, and the sub-surface is positioned at the top of the feed network using a clamping ring.

[0079] During the setup or dismantling of the antenna, the above steps can be adjusted in sequence as needed to achieve the setup or dismantling of a movable antenna.

Claims

1. A lift-up, multi-frequency switched-feed, large-aperture portable antenna, comprising a base assembly and a reflector assembly; characterized in that, The base assembly consists of a support leg (2), a lifting mechanism (1), a seat frame mechanism (3), and a push rod mechanism (4); wherein, the bottom edge of the lifting mechanism is connected to multiple horizontally arranged support legs, and the middle position of the support leg is connected to the outer cylinder of the lifting mechanism through a support rod (8); the seat frame mechanism (3) is located at the top of the inner cylinder of the lifting mechanism, and the push rod mechanism is connected to one side of the seat frame mechanism. The reflective assembly consists of a main reflective surface (5), a feed network (6), and a secondary reflective surface (7); the main reflective surface is mounted on the top of the frame structure, and the secondary reflective surface is connected to the center of the main reflective surface through the feed network, wherein the central axes of the main reflective surface (5), the feed network (6), and the secondary reflective surface (7) coincide. The lifting mechanism consists of a base (11), an outer cylinder (12), and an inner cylinder (13); the outer cylinder is fixedly connected to the top of the base, and the inner cylinder is constrained inside the outer cylinder and can slide along the central axis of the outer cylinder; a lifting drive mechanism (33) is provided at the bottom of the outer cylinder (12), and a lifting screw (32) is connected to the output end of the lifting drive mechanism. The lifting screw is threadedly connected to the bottom of the inner cylinder; the bottom end of the lifting screw is connected to the bottom bearing of the outer cylinder. The feed network is fitted with the inner hole of the center body through a positioning stop. The feed network has evenly distributed quick-release screws (76) in the circumferential direction at the bottom, which are connected to the center body of the main reflector. The feed network has handles (77) at the bottom and top.

2. The lift-up multi-frequency switch-feed type large-aperture portable antenna according to claim 1, characterized in that, The support leg is composed of a front section (43), a rear section (46), and a leveling foot (47) connected in sequence; the upper edges of the front and rear sections are hinged by a folding shaft (44), and the lower edges are locked and disassembled by a support leg quick-release pin (45); the connecting surface of the front section (43) is provided with an L-shaped slot (41) and a pin hole (42); the extending direction of the L-shaped slot (41) and the pin hole (42) is parallel to the central axis of the folding shaft.

3. The lift-up multi-frequency switch-feed type large-aperture portable antenna according to claim 1, characterized in that, The base is equipped with base feet at its bottom; The main body of the base is a base frame (22), and multiple pin supports (24) are evenly distributed in the circumferential direction of the base frame (22); each pin support is provided with a cylindrical pin (23) on the upper side and a quick-release pin (25) on the lower side, wherein the cylindrical pin (23) corresponds to the L-shaped slot (41) one by one, and the pin hole (42) corresponds to the quick-release pin (25) one by one; The outer cylinder (12) and the inner cylinder (13) are connected by a linear guide (31), which is used to prevent the outer cylinder (12) and the inner cylinder (13) from rotating relative to each other. The outer cylinder (12) has a lifting operation hole (21) on one side of its bottom. The main body of the lifting drive mechanism is a reduction mechanism (34). The input end of the reduction mechanism is connected to the lifting operation hole, and the output end is connected to the lifting screw and drives the lifting screw to rotate.

4. A lift-up multi-frequency switch-feed type large-aperture portable antenna according to claim 3, characterized in that, The linear guide (31) is provided in four sets, and the lifting screw is located at the center of the four sets of linear guides.

5. A lift-up multi-frequency switch-feed type large-aperture portable antenna according to claim 1, characterized in that, The mounting mechanism (3) consists of a turntable chassis (51), an orientation drive motor (52), and a worm gear assembly (53); wherein the turntable chassis (51) is fixedly installed on the top of the inner cylinder; The azimuth drive motor and the worm gear assembly are both located on the turntable chassis. The upper surface of the turntable chassis is provided with an azimuth turntable, which is connected to the turntable chassis bearing. The azimuth drive motor (52) drives the worm gear assembly (53) to rotate, thereby driving the upper azimuth turntable (54) to rotate, thus realizing the azimuth rotation of the antenna.

6. A lift-up multi-frequency switch-feed type large-aperture portable antenna according to claim 5, characterized in that, The push rod mechanism includes a pitch turntable (58), a pitch drive support, and a pitch screw (63). The pitch turntable is hinged to the azimuth turntable via pitch lugs; the azimuth turntable is provided with a screw mounting hole (55) on the rear side, and the pitch drive support is hinged to the screw mounting hole via screw lugs (65) on both sides of its top; the pitch drive support is also provided with a pitch motor (61), a pitch reducer (62) and a pitch nut, the pitch motor (61) further drives the pitch nut to rotate through the pitch reducer, the pitch screw located on the pitch drive support is threadedly connected to the pitch nut, and the rotation of the pitch nut drives the extension and retraction of the pitch screw; The pitch turntable has a pitch hinge hole (59) on its back side, which is connected to a ball joint (64) on the top of the pitch screw.

7. A lift-up multi-frequency switch-feed type large-aperture portable antenna according to claim 6, characterized in that, The top of the lead screw mounting hole is provided with a lead screw cover (56) to constrain the pitch drive support.

8. A lift-up multi-frequency switch-feed type large-aperture portable antenna according to claim 1, characterized in that, The strut has a horizontal bar (49) in the middle and ball joints (50) at both ends. The strut is used to achieve the diagonal reinforcement of the lifting mechanism.

9. A lift-up multi-frequency switch-feed type large-aperture portable antenna according to claim 1, characterized in that, The main reflective surface is composed of a central body (71), an inner ring panel (72), and an outer ring panel (73). The inner ring panel (72) is positioned and connected by positioning pins and locking pins, and the outer ring panel is connected by locking fasteners. The central body, inner ring panel, and outer ring panel are all made of carbon fiber honeycomb sandwich material.

10. A lift-up multi-frequency switch-feed type large-aperture portable antenna according to claim 1, characterized in that, The feed network and the central body are connected and fixed with non-removable screws; The middle part of the feed network is the network component, and the top part is the feed component (79); the bottom of the sub-reflector is a clamping ring (81) that is connected to the top of the feed network. The clamping ring is provided with a clamping screw in the middle for tightening and loosening the clamping ring; the sub-reflector is a shaped rotary surface, which is supported and positioned by four sets of sub-surface support rods (83).

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