CN215680970U

CN215680970U - Vehicle-mounted satellite communication antenna

Info

Publication number: CN215680970U
Application number: CN202121580337.6U
Authority: CN
Inventors: 刘重洋; 王立; 邓庆勇; 刘培帅
Original assignee: Hefei Rhosoon Intelligent Technology Co ltd
Current assignee: Hefei Rhosoon Intelligent Technology Co ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2022-01-28
Anticipated expiration: 2031-07-08

Abstract

The utility model relates to a vehicle-mounted satellite communication antenna which comprises a first driving mechanism, a sliding ring, a second driving mechanism, a sliding rail assembly, a push rod, a connecting rod and a feed source assembly, wherein the first driving mechanism is fixedly connected with the sliding ring to drive the sliding ring to horizontally rotate, the sliding rail assembly is fixedly connected with the top of the sliding ring, the second driving mechanism is fixed at one horizontal end of the sliding rail assembly, the second driving mechanism is fixedly connected with the push rod, the push rod is fixedly connected with the feed source assembly through the connecting rod, and the connecting rod penetrates through the sliding rail assembly and is in sliding connection with the sliding rail assembly. According to the utility model, the first driving mechanism drives the slip ring to rotate by three hundred and sixty degrees so as to realize omnibearing coverage, the second driving mechanism drives the push rod to horizontally move, and the push rod drives the feed source assembly to slide along the sliding rail assembly, so that the feed source assembly is controlled to realize beam pointing at any pitch angle within the range from the zenith to the elevation angle of 10 degrees, and the scanning range of the antenna is enlarged.

Description

Vehicle-mounted satellite communication antenna

Technical Field

The utility model relates to the technical field of satellite communication, in particular to a vehicle-mounted satellite communication antenna.

Background

The communication in motion is short for a mobile satellite ground station communication system. The satellite-ground communication-in-motion is a new application generated in order to meet the requirement of users for transmitting broadband video information in dynamic movement through satellites, and the mobile communication transmission of the broadband information by using the Ku frequency band of the fixed orbit satellites is a new business application. Through the communication-in-motion system, mobile carriers such as vehicles, ships, airplanes and the like can track platforms such as satellites and the like in real time in the motion process, and multimedia information such as voice, data, images and the like can be uninterruptedly transmitted, so that the requirements of various military and civil emergency communication and multimedia communication under mobile conditions can be met.

Currently, "communication in motion" systems use mostly the Ku band to communicate with fixed orbit satellites. According to file requirements of 'general technical requirements for vehicle satellite communication earth stations used in Ku frequency band stationary', 'general technical requirements for Ku frequency band portable satellite communication earth stations' and the like published in 2014, a Ku band 'communication-in-motion' system needs to be composed of an application subsystem, a power supply subsystem, a channel subsystem, an antenna, a control system of the antenna and the like. The antenna system needs to cover uplink/downlink frequency bands simultaneously, wherein the uplink frequency band is 13.75-14.5 GHz, the downlink frequency band is 10.95-11.75 GHz and 12.25-12.75 GHz, and the polarization of the uplink frequency band and the polarization of the downlink frequency band are two orthogonal linear polarizations. To ensure smooth communication between the satellite and the ground mobile device, the system antenna needs to be pointed to the communication satellite in real time.

In order to avoid interference to adjacent satellites when the antenna transmits, the tracking error of the antenna is usually required to be less than 0.1 degrees when the mobile device moves, the feed source also needs to perform rotation tracking, and the polarization isolation between receiving and transmitting is larger than 30 dB. In addition, the document also puts corresponding requirements on the transmission power, the side lobe level, etc. of the antenna.

At present, a plurality of enterprises at home and abroad have promoted products related to communication in motion, such as a multi-chip antenna promoted by RaySat of israel, an IMVS450M product promoted by tracsar in the united states, a Mijet series product promoted by Starling of israel, and 0.5m and 1.2m vehicle-mounted ring-focus antennas developed by medium and domestic electric group 54. In order to meet the requirement of high-precision real-time tracking and aligning of the antenna to the satellite, the communication-in-motion products all comprise automatic tracking systems. The automatic tracking system measures course angle, longitude and latitude of carrier position and initial angle relative to horizontal plane by GPS, theodolite and strapdown inertial navigation system under initial static condition, then automatically determines antenna elevation angle using horizontal plane as reference according to its posture, geographical position and satellite longitude, rotates azimuth under the premise of keeping elevation angle unchanged to horizontal plane and automatically aligns satellite by signal maximum value mode. In the carrier motion process, the change of the carrier attitude is measured, the change is converted into an error angle of the antenna through the operation of a mathematical platform, the azimuth angle, the pitch angle and the polarization angle of the antenna are adjusted through a servo mechanism, the fact that the antenna is within a specified range with respect to the satellite in the change process of the carrier is guaranteed, and the satellite transmitting antenna tracks the geostationary satellite in real time in the carrier motion process. The system has two tracking modes, namely self-tracking and inertial navigation tracking. The self-tracking is to rely on a satellite beacon to carry out antenna closed loop servo tracking; the inertial navigation tracking is to track the antenna by using the change of a gyro inertial navigation combined sensitive carrier. These two types of tracking can be automatically switched according to the field situation. After the system is switched to automatic tracking after the satellite is pointed, the system works in an automatic tracking mode; meanwhile, the inertial navigation system also enters a working state and continuously outputs data such as antenna polarization, azimuth, pitching and the like. When the antenna beacon signal is interrupted due to occlusion or other reasons, the system automatically switches to the inertial navigation tracking mode.

Regardless of the tracking mode adopted by the antenna, a high-precision servo system is always one of the key parts of the traditional communication-in-motion system. Generally, a high-precision servo system needs to have high tracking precision of about 0.1 degrees, and meanwhile, the communication-in-motion antenna has larger caliber (the caliber of the antenna meeting the network access requirement at present exceeds 1 meter) and weight, so that the high cost of the high-precision servo system is caused. At present, the cost of a high-precision servo system applied to the communication in motion is tens of thousands, even more than a hundred thousand, and accounts for a large part of the cost of the whole communication in motion system, so that the wide application of the communication in motion system in the civil field is limited.

In order to enable the satellite communication in motion to be widely applied to the civil field, for example, to be applied to vehicle-mounted satellite communication, the vehicle-mounted satellite communication antenna needs to ensure the capability of large-angle and high-precision beam scanning and tracking and reduce the cost.

For example, the utility model with the application number "CN 201020158044.4" provides a vehicle satellite communication, in which the vehicle satellite communication antenna is composed of an antenna feeder system, a servo turntable, a sensor and an antenna controller; however, the patent only includes a servo turntable to adjust the direction, the pitch angle adjustment is limited, and the pitch range is small, so that the capability of scanning and tracking a beam at a large angle and with high precision on a satellite is not provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a vehicle-mounted satellite communication antenna to solve the problem that the pitching angle adjustment of the communication antenna is limited.

The utility model solves the technical problems through the following technical means:

a vehicle-mounted satellite communication antenna comprises an antenna housing, wherein the antenna housing is fixedly connected with a bottom plate to form a closed space, a first driving mechanism, a sliding ring, a second driving mechanism, a sliding rail assembly, a push rod, a connecting rod, a feed source assembly, a Luneberg lens and a rotating tray are fixedly arranged in the antenna housing and positioned at the top of the bottom plate, the first driving mechanism is fixedly connected with the rotating tray and drives the rotating tray to rotate, the rotating tray is concentrically provided with the sliding ring, one side of the top of the sliding ring is provided with the sliding rail assembly, one horizontal end of the sliding rail assembly is fixedly provided with the second driving mechanism on the rotating tray, the second driving mechanism penetrates through one end of the sliding rail assembly and is hinged with one end of the push rod, the other end of the push rod is connected with the feed source assembly through the connecting rod, the connecting rod penetrates through a sliding cavity arranged in the sliding rail assembly and is connected with the sliding cavity in a sliding manner, the Luneberg lens is fixed on the top of the rotary tray through the support and is positioned above the sliding rail assembly.

Thereby first actuating mechanism drives rotatory tray three hundred sixty degrees rotations all-round covers to realize the wave beam pointing in arbitrary position, and second actuating mechanism drive push rod horizontal motion, the push rod drives the feed subassembly and slides along slide rail set spare, thereby control the feed subassembly and realize from the sky top (10 elevation) to the arbitrary angle of pitch wave beam pointing in 80 elevation angle scopes, increased the scanning range of antenna.

As a further scheme of the utility model: first actuating mechanism includes motor cabinet, first motor, action wheel, belt and from the driving wheel, wherein, on the motor cabinet was fixed in the base, according to the place of wanting the work select can, the motor cabinet is fixed with first motor and in order to support first motor, the vertical downward just output shaft fixedly connected with action wheel of first motor, the cover is equipped with the belt on the action wheel, and is connected from the driving wheel through the belt, the bottom from the driving wheel is provided with the supporting part of rotation connection, top and rotatory tray fixed connection from the driving wheel.

When first motor work rotated, the drive action wheel rotated, and the action wheel passes through the belt and rotates with the follow driving wheel, just so can drive the sliding ring and rotate, and first motor also can vertically upwards place, and first motor is servo motor, can just reversing.

As a further scheme of the utility model: the driven wheel is of an annular structure, and the driven wheel is matched with the supporting part and is rotationally connected with the supporting part.

As a further scheme of the utility model: the second driving mechanism comprises a second motor, a gear and a rack, wherein the second motor is fixed to the top of the rotating tray through bolts, the output end of the second motor penetrates through the top of the horizontal end of the sliding rail assembly, the output shaft of the second driving mechanism penetrates through the sliding rail assembly and is fixedly connected with the gear, the gear and the rack are meshed with each other and connected, the rack is arranged at the top of the sliding rail, and one end, away from the gear, of the rack is hinged to the push rod through a pin shaft and a shaft seat.

As a further scheme of the utility model: the rack comprises a rack part and a sliding rod part, the rack part is meshed with the gear, the bottom of the rack part is fixedly connected with the sliding rod part into an integral structure, and the sliding rod part is connected with the sliding ring in a sliding mode.

As a further scheme of the utility model: the sliding rail assembly comprises a sliding rail body and a sliding cavity, wherein the bottom of the sliding rail body is fixedly connected with the top of the rotating tray, and the sliding cavity is formed in the sliding rail body and used for accommodating the connecting rod to slide.

When the sliding ring rotates, the supporting column is driven to rotate, and the supporting column further drives the sliding rail body to rotate.

As a further scheme of the utility model: the push rod includes first hinge hole, second hinge hole, the push rod is articulated through first hinge hole and rack, the push rod is articulated through the one end of second hinge hole and connecting rod, the other end of connecting rod runs through sliding chamber body and fixedly connected with feed subassembly.

Second motor work drives gear revolve, and gear and rack mesh and drive rack horizontal motion, and rack and push rod fixed connection, push rod horizontal motion also can follow thereupon, like this the push rod will give connecting rod one horizontally power, forces the connecting rod to move thereupon, again because the connecting rod sets up in sliding chamber, thereby the connecting rod can slide in sliding chamber, just so can realize the feed subassembly and move along sliding chamber.

As a further scheme of the utility model: the push rod is a rectangular plate or a cylindrical rod.

As a further scheme of the utility model: the feed source assembly comprises a feed source body, a polarization motor and a microwave assembly, wherein the polarization motor is fixedly connected with the connecting rod, an output shaft of the polarization motor is fixedly connected with the feed source body, the microwave assembly is fixed at one end of the polarization motor, which is far away from the feed source body, and the polarization motor is used for realizing polarization adjustment; the microwave component is formed by integrating a duplexer, an LNB and a BUC.

As a further scheme of the utility model: the system also comprises an inertial navigation module, a Beidou module and a controller;

the inertial navigation module is fixed at the feed source and is electrically connected with the controller through a lead, and the inertial navigation module moves along with the feed source, records the position and state information of the feed source in real time and provides the position and state information of the feed source to the controller;

the Beidou module is fixedly arranged in the antenna housing, needs to be far away from the servo motor, the sliding ring and the sliding rail as far as possible to reduce interference, is connected with the controller through a lead and provides the relative position of the antenna and the satellite to the controller in real time;

the controller is fixedly arranged inside the antenna housing.

The inertial navigation module gives the instantaneous state of the antenna motion unit, and the controller completes calculation and drives the first motor, the second motor and the polarization motor to work.

The utility model has the advantages that:

1. the feed source has a simple structure, the second driving mechanism is fixedly connected with the push rod and drives the push rod to horizontally move, the push rod horizontally moves to drive the feed source component to slide along the slide rail component, and the Luneberg lens is fixed at the top of the rotary tray through the support and is positioned above the slide rail component, so that beam scanning can be realized by only one feed source; the problem of limited pitch angle is overcome in a large range (+ -80 degrees) of three-hundred and sixty-degree azimuth and pitch, so that the satellite beam scanning and tracking device has the capability of scanning and tracking beams with large angle and high precision.

2. Compared with the traditional communication-in-motion antenna, the lens antenna has lower side lobe while having high gain; this allows the antenna to transmit with less interference to neighboring satellites while receiving at a lower level of interference from other signal sources.

3. The lens structure can enable the servo system to realize beam pointing adjustment in a large range only by rotating the feed source, thereby greatly reducing the load of the servo system and further reducing the overall power consumption and cost of the system.

Drawings

Fig. 1 is a first axis view of the on-board satellite communication antenna of the present invention.

Fig. 2 is a second axis view of the on-board satellite communication antenna of the present invention.

Fig. 3 is a schematic structural view of the rack in the present invention.

FIG. 4 is a schematic view of the local axis measurement of the on-board satellite communication antenna according to the present invention

Figure 5 is a schematic of a single feed gain for a 200mm diameter luneberg lens.

Fig. 6 is a schematic diagram of a simulated one-dimensional feed coverage of a luneberg lens (200 mm in diameter) of the feed in the moving process of the feed in the utility model.

Figure 7 is a schematic of a single feed gain at 160mm diameter for a luneberg lens.

Fig. 8 is a schematic diagram of a simulated one-dimensional feed coverage of a luneberg lens (160 mm in diameter) of the feed in the moving process of the feed in the utility model.

Figure 9 is a schematic of a single feed gain for a luneberg lens diameter of 350 mm.

In the figure, 1-a first driving mechanism, 101-a motor base, 102-a first motor, 103-a driving wheel, 104-a belt, 105-a driven wheel, 2-a slip ring, 3-a supporting column, 4-a second driving mechanism, 401-a second motor, 402-a gear, 403-a rack, 4031-a rack part, 4032-a sliding rod part, 5-a sliding rail component, 501-a sliding rail body, 502-a sliding cavity, 6-a push rod, 601-a first hinge hole, 602-a second hinge hole, 7-a connecting rod, 8-a feed source component, 801-a feed source body, 802-a polarization motor, 803-a microwave component, 9-a luneberg lens, 10-a rotating tray, 11-a radome; 12. a slide rail; 13. a support portion.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1, 2, 3 and 4, fig. 1 is a schematic structural diagram of a vehicle-mounted satellite communication antenna according to the present invention; fig. 1 is a first axial view of a vehicle-mounted satellite communication antenna according to the present invention, fig. 2 is a second axial view of the vehicle-mounted satellite communication antenna according to the present invention, fig. 3 is a structural view of a rack according to the present invention, and fig. 4 is a partial axial view of the vehicle-mounted satellite communication antenna according to the present invention; the antenna housing comprises an antenna housing 11 with a closed structure, the antenna housing 11 is fixedly connected with a bottom plate through bolts to form a closed space, a first driving mechanism 1, a sliding ring 2, a second driving mechanism 4, a sliding rail assembly 5, a push rod 6, a connecting rod 7, a feed source assembly 8, a Luneberg lens 9 and a rotating tray 10 are fixedly arranged inside the antenna housing 11 and positioned at the top of the bottom plate, wherein the first driving mechanism 1 is fixedly connected with the rotating tray 10 and drives the rotating tray 10 to rotate, the sliding ring 2 is concentrically arranged at the center of the rotating tray 10, the sliding rail assembly 5 fixedly connected with the bolts is arranged at the top of the rotating tray 10 at one side of the sliding ring 2, the second driving mechanism 4 is fixedly fixed with the rotating tray 10 through the bolts at one horizontal end of the sliding rail assembly 5, and the second driving mechanism 4 penetrates through one end of the sliding rail assembly 5 and is hinged with one end of the push rod 6, the other end of the push rod 6 is connected with the feed source assembly 8 through a connecting rod 7, the connecting rod 7 penetrates through a sliding cavity 502 formed in the sliding rail assembly 5 and is in sliding connection with the sliding cavity 502, and the luneberg lens 9 is fixed to the top of the rotating tray 10 through a support bolt and is located above the sliding rail assembly 5.

Preferably, in the embodiment, the sliding track of the feed source assembly 8 sliding along the sliding cavity 502 is arc-shaped, the sliding track is below the luneberg lens 9, and one end of the sliding track is flush with the 1/3-1/2 height of the luneberg lens 9, and the other end of the sliding track is directly below the luneberg lens 9.

Thereby first actuating mechanism 1 drives rotatory tray 10 three hundred sixty degrees rotations and all-round cover to realize the wave beam of arbitrary position directional, and 6 horizontal motion of second actuating mechanism 4 drive push rod, push rod 6 drives feed subassembly 8 and slides along slide rail set 5, thereby control feed subassembly 8 and realize from the zenith (90 elevation) to arbitrary pitch angle wave beam directional of 10 elevation (80 depression) within ranges, increased the scanning range of antenna.

The shape of the radome 11 can be selected according to actual working requirements, and in this embodiment, the radome is preferably a hollow cylinder structure with two ends connected, and one end of the radome is welded with an 1/2 ellipsoidal shell.

In fig. 1, further, in this embodiment, the first driving mechanism 1 includes a motor base 101, a first motor 102, a driving wheel 103, a belt 104, and a driven wheel 105, where the motor base 101 may be fixed on a base by bolts, and is selected according to a place to be worked, the motor base 101 is fixed on the first motor 102 by bolts to support the first motor 102, the first motor 102 is vertically downward and has an output shaft fixedly connected with the driving wheel 103, the driving wheel 103 is sleeved with the belt 104 and is connected with the driven wheel 105 by the belt 104, a supporting portion 13 rotatably connected is disposed at the bottom of the driven wheel 105, the supporting portion 13 simultaneously plays a role of supporting the driving wheel 105, the top of the driven wheel 105 is fixedly connected with the rotating tray 10 by bolts, and a hole is formed in the middle of the rotating tray 10 to accommodate the slip ring 2.

The slip ring 2 is used to connect one end of the lead to the rotating tray 10 and the other end to the fixed part support part 13, so as to prevent the winding phenomenon during the rotation, and the connection structure of the slip ring 2 and the lead is the prior art and is not within the protection scope of the utility model.

The driven wheel 105 is of an annular structure, the driven wheel 105 is matched with the supporting portion 13 and is connected with the supporting portion 13 in a rotating mode, a protruding portion is arranged in the middle of the supporting portion 13, and the protruding portion penetrates through the middle of the driven wheel 105 and is attached to the inner wall of the driven wheel 105 in a rotating mode.

When the first motor 102 works and rotates, the driving wheel 103 is driven to rotate, the driving wheel 103 rotates with the driven wheel 105 through the belt 104, and the driven wheel 105 is fixedly connected with the rotating tray 10, so that the rotating tray 10 can be driven to rotate.

The first motor 102 is a servo motor, and can rotate in forward and reverse directions.

In fig. 4, further, in this embodiment, the slip ring further includes a supporting column 3, and the supporting column 3 is sleeved outside the slip ring 2.

In fig. 1 and 2, the second driving mechanism 4 includes a second motor 401, a gear 402, and a rack 403, wherein the second motor 401 is fixed on the top of the rotating tray 10 by bolts, an output end of the second motor 401 penetrates through the top of the horizontal end of the sliding rail assembly 5, an output shaft of the second driving mechanism 4 penetrates through the sliding rail assembly 5 and is fixedly connected with the gear 402, the gear 402 and the rack 403 are engaged with each other and connected, the rack 403 is disposed on the top of the sliding rail 12 in a sliding manner, and one end of the rack 403, which is far away from the gear 402, is hinged to the push rod 6 through a pin shaft and a shaft seat.

Wherein, the slide rail 12 is fixed on the top of the rotary tray 10 by bolts.

It can be understood that, be provided with the limiting plate around rack 403, the bottom surface of rack 403 and the top of slide rail 12 are laminated sliding connection mutually, and front and back limiting plate laminates with the front and back side of slide rail 12 mutually respectively, can play limiting displacement like this and prevent 403 from droing.

Further, as shown in fig. 3, fig. 3 is a schematic structural view of the rack of the present invention; the rack 403 comprises a rack portion 4031 and a sliding rod portion 4032, the rack portion 4031 is meshed with the gear 402, the bottom of the rack portion 4031 is fixedly connected with the sliding rod portion 4032 into a whole, limiting plates are symmetrically and fixedly arranged in the front and back of the sliding rod portion 4032, and the bottom of the sliding rod portion 4032 is attached to the top of the sliding rail 12.

In fig. 1 and 2, the slide rail assembly 5 includes a slide rail body 501 and a slide cavity 502, wherein the bottom of the slide rail body 501 is welded or fixedly connected to the top end of the rotating tray 10 by a bolt, and the slide rail body 501 is provided with the slide cavity 502 for accommodating the connecting rod 7 to slide.

In fig. 1 and 2, further, in this embodiment, the push rod 6 includes a first hinge hole 601 and a second hinge hole 602, the push rod 6 is hinged to the rack 403 through the first hinge hole 601, the push rod 6 is hinged to one end of the connecting rod 7 through the second hinge hole 602, and the other end of the connecting rod 7 penetrates through the sliding cavity 502 and is fixedly connected with the feed source assembly 8.

In this embodiment, the second motor 401 drives the gear 402 to rotate, the gear 402 is meshed with the rack 403 and drives the rack 403 to horizontally move on the slide rail 12, the rack 403 is hinged to the push rod 6, the push rod 6 also moves along with the rack, so that the push rod 6 gives a force to the connecting rod 7 to force the connecting rod 7 to move along with the rack, and the connecting rod 7 is disposed in the slide cavity 502, so that the connecting rod 7 slides in the slide cavity 502, and the connecting rod 7 is fixedly connected with the feed source assembly 8, so that the feed source assembly 8 can move along the slide cavity 502, and the feed source assembly 8 is controlled to realize any pitch angle beam pointing within a range from a zenith (90-degree elevation angle) to a 10-degree elevation angle (80-degree depression angle), thereby increasing the scanning range of the antenna.

As shown in fig. 1 and fig. 2, further, the feed source assembly 8 includes a feed source body 801, a polarization motor 802, and a microwave assembly 803, wherein the polarization motor 802 is fixedly connected to the connecting rod 7 by a bolt, an output shaft of the polarization motor 802 is fixedly connected to the feed source body 801, one end of the polarization motor 802 (i.e., the bottom of the polarization motor 802) far away from the feed source body 801 is fixedly connected to the microwave assembly 803 by a bolt, and the polarization motor 802 is used for realizing polarization adjustment of the feed source body 801.

The microwave component 803 is formed by integrating a duplexer, an LNB, and a BUC, where the LNB is a low noise down converter, and the BUC is an up-conversion power amplifier.

In this embodiment, the feed source body 801 and the duplexer are connected by a cable, and the duplexer is divided into two paths and respectively connected with the LNB and the BUC by cables.

In addition, the first motor, the second motor and the polarization motor in this embodiment are all electrically connected to the power driving module and the controller through wires, and the first motor, the second motor and the polarization motor are controlled by the controller to work as the prior art, which is not described in detail herein.

The working principle is as follows:

when the first motor 102 works and rotates, the driving wheel 103 is driven to rotate, and the driving wheel 103 and the driven wheel 105 rotate through the belt 104, so that the rotating tray 10 can be driven to rotate, and the sliding rail body 501 is driven to rotate;

the second motor 401 works to drive the gear 402 to rotate, the gear 402 is meshed with the rack 403 and drives the rack 403 to horizontally move, the rack 403 is hinged to the push rod 6, the push rod 6 can move along with the rack, the push rod 6 can provide force for the connecting rod 7, the connecting rod 7 is forced to move along with the rack, and the connecting rod 7 is arranged in the sliding cavity 502, so that the connecting rod 7 can slide in the sliding cavity 502, the feed source assembly 8 can move along the sliding cavity 502, the feed source assembly 8 is controlled to achieve beam pointing at any pitch angle within the range from the zenith (90-degree elevation angle) to 10-degree elevation angle, and the scanning range of the antenna is enlarged.

Example 2

The embodiment 2 is different from the embodiment 1 in that the navigation device further comprises an inertial navigation module, a Beidou module and a controller;

the inertial navigation module is fixed at the feed source through a bolt and is electrically connected with the controller through a lead, and the inertial navigation module moves along with the feed source, records the position and state information of the feed source in real time and provides the position and state information to the controller;

the Beidou module is arranged in the antenna housing 11 through bolts, and needs to be far away from the servo motor 102, the slip ring 2 and the slide rail 5 as far as possible so as to reduce interference, and the Beidou module is connected with the controller through a lead wire and provides the relative position of the antenna and the satellite to the controller in real time;

the controller bolt is arranged inside the antenna housing.

It should be noted that the beidou module, the inertial navigation module and the controller in this embodiment are all existing products, and detailed description is omitted here.

The working principle is as follows: the inertial navigation module gives the instantaneous state of the antenna motion unit, and the controller completes calculation and drives the first motor, the second motor and the polarization motor to work.

It should be noted that, in the simulation experiment performed in this embodiment, the feed source moving range is twice as large as the sliding range of the feed source body 801 along the slide rail body 501 in the vehicle-mounted satellite communication antenna in embodiment 1, and because the arc motions along the left half or the right half of the luneberg lens 9 are symmetrical, the simulation experiment here can completely show the gain effect of the mechanical structure.

Wherein, fig. 5 is a schematic diagram of a single feed source gain when the diameter of the luneberg lens is 200mm (at this time, the feed source is located right below the luneberg lens); fig. 6 is a schematic diagram of a simulated one-dimensional feed coverage of a luneberg lens (with a diameter of 200mm) in the moving process of the feed according to the present invention, as shown in fig. 5 and 6, it can be seen from fig. 5 that the gain is 27dB, the 3dB beam width is 6.9 °, and it can be seen from fig. 6 that the 3dB beam coverage is ± 80 °, and it is estimated that when the lens diameter is 350mm, the gain is 32dB, and the 3dB beam width is 4 °.

FIG. 7 is a schematic of a single feed gain for a Luneberg lens diameter of 160 mm; fig. 8 is a schematic diagram of a simulated one-dimensional feed coverage of a luneberg lens (diameter 160mm) of the feed in the moving process of the utility model, as shown in fig. 7 and 8, it can be seen from fig. 7 that the gain is 26.5dB, the 3dB beam width is 7.4 °, and it is known from fig. 8 that the 3dB beam coverage is ± 80 °; it was estimated that when the lens diameter was 300mm, the gain was 31.8dB and the 3dB beam width was 4 deg..

FIG. 9 is a schematic of a single feed gain for a Luneberg lens diameter of 350 mm; only a single feed simulation calculation was performed for a luneberg lens 350mm in diameter, limited by the computational power, and it can be seen from fig. 9 that the gain was 32dB, the 3dB beamwidth was 4 °, and the estimated values were accurate.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A vehicle-mounted satellite communication antenna is characterized by comprising an antenna housing (11), wherein the antenna housing (11) is fixedly connected with a bottom plate to form a closed space, a first driving mechanism (1), a sliding ring (2), a second driving mechanism (4), a sliding rail assembly (5), a push rod (6), a connecting rod (7), a feed source assembly (8), a Luneberg lens (9) and a rotating tray (10) are fixedly arranged inside the antenna housing (11) and positioned at the top of the bottom plate, the first driving mechanism (1) is fixedly connected with the rotating tray (10) and drives the rotating tray (10) to rotate, the sliding ring (2) is concentrically arranged on the rotating tray (10), the sliding rail assembly (5) is arranged on one side of the top of the sliding ring (2), and a second driving mechanism (4) is fixed at one horizontal end of the sliding rail assembly (5) and on the rotating tray (10), the second driving mechanism (4) penetrates through one end of the sliding rail assembly (5) and is hinged to one end of the push rod (6), the other end of the push rod (6) is connected with the feed source assembly (8) through a connecting rod (7), the connecting rod (7) penetrates through a sliding cavity (502) formed in the sliding rail assembly (5) and is in sliding connection with the sliding cavity (502), and the Luneberg lens (9) is fixed to the top of the rotating tray (10) through the support and is located above the sliding rail assembly (5).

2. An on-board satellite communication antenna according to claim 1, characterized in that the first drive mechanism (1) comprises a motor base (101), a first motor (102), a driving wheel (103), a belt (104) and a driven wheel (105), wherein,

the motor cabinet (101) is fixedly connected with a first motor (102) to support the first motor (102), the first motor (102) vertically faces downwards, an output shaft is fixedly connected with a driving wheel (103), a belt (104) is sleeved on the driving wheel (103) and is connected with a driven wheel (105) through the belt (104), a supporting portion (13) connected in a rotating mode is arranged at the bottom of the driven wheel (105), and the top of the driven wheel (105) is fixedly connected with a rotating tray (10).

3. An on-board satellite communication antenna according to claim 2, wherein the driven wheel (105) is a ring-shaped structure, and the driven wheel (105) is coupled to the support portion (13) for rotation.

4. The vehicle-mounted satellite communication antenna according to claim 1, wherein the second driving mechanism (4) comprises a second motor (401), a gear (402) and a rack (403), wherein the second motor (401) is fixed on the top of the rotating tray (10) through a bolt, the output end of the second motor (401) penetrates through the top of the horizontal end of the sliding rail assembly (5), the output shaft of the second driving mechanism (4) penetrates through the sliding rail assembly (5) and is fixedly connected with the gear (402), the gear (402) is meshed with the rack (403) and is connected with the rack (403), the rack (403) is arranged on the top of the sliding rail (12), and the end, away from the gear (402), of the rack (403) is hinged to the push rod (6) through a pin shaft seat.

5. Vehicle satellite communication antenna according to claim 4, characterized in that the rack (403) comprises a rack portion (4031) and a sliding rod portion (4032), the rack portion (4031) is engaged with the gear (402), the bottom of the rack portion (4031) is fixedly connected with the sliding rod portion (4032) as a whole, and the sliding rod portion (4032) is connected with the sliding ring (2) in a sliding manner.

6. The vehicle-mounted satellite communication antenna according to claim 4, wherein the slide rail assembly (5) comprises a slide rail body (501) and a slide cavity (502), wherein the bottom of the slide rail body (501) is fixedly connected with the top of the rotating tray (10), and the slide rail body (501) is provided with the slide cavity (502) to accommodate the connecting rod (7) in a sliding manner.

7. The vehicle satellite communication antenna according to claim 6, wherein the push rod (6) comprises a first hinge hole (601) and a second hinge hole (602), the push rod (6) is hinged with the rack (403) through the first hinge hole (601), the push rod (6) is hinged with one end of the connecting rod (7) through the second hinge hole (602), and the other end of the connecting rod (7) penetrates through the sliding cavity (502) and is fixedly connected with the feed source assembly (8).

8. An on-board satellite communication antenna according to claim 6, characterized in that the push rod (6) is a rectangular plate or a cylindrical rod.

9. An on-vehicle satellite communication antenna of claim 4, characterized in that, the feed subassembly (8) includes feed body (801), polarization motor (802), microwave subassembly (803), wherein, polarization motor (802) and connecting rod (7) fixed connection, and the output shaft fixed connection of polarization motor (802) has feed body (801), the one end that polarization motor (802) kept away from feed body (801) is fixed with microwave subassembly (803).

10. The vehicle-mounted satellite communication antenna according to claim 4, further comprising an inertial navigation module, a Beidou module and a controller, wherein the inertial navigation module is fixed at the feed source and electrically connected with the controller through a wire; the Beidou module is arranged inside the antenna housing (11) and is connected with the controller through a wire; the controller sets up inside the antenna house.