Ka-band multi-beam satellite communication terminal

Abstract

The utility model provides a Ka frequency band multi-beam satellite communication terminal, comprising a housing, an active phased-array antenna module arranged in the housing, the active phased-array antenna module is connected with a tracking control module through a down-conversion module and an up-conversion module, the tracking control module is connected with a power supply management module and a communication interface, and the power supply management module is connected with the communication interface. The power management module is provided with a power interface, and the active phased-array antenna module comprises a transmitting array antenna and a receiving array antennae. The Ka frequency band satellite phased-array antenna satellite communication terminal has the advantages of small size, light weight, high gain, low power consumption, strong anti-interference capability and the like; a multi-beam phased-array antenna in an antenna multiplexing form is adopted, so that communication continuity and stability can be ensured in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of satellite communications, in particular to a Ka-band multi-beam satellite communication terminal. Background Art

[0002] Currently, traditional satellite communication terminals have limited bandwidth, large size and weight, and are difficult to effectively match low-orbit satellite communications. Utility Model Content

[0003] The technical problem solved by the present invention is to provide a Ka-band multi-beam satellite communication terminal to solve the problems raised in the above background technology.

[0004] The technical problem solved by the present invention is achieved by the following technical solution: A Ka-band multi-beam satellite communication terminal, comprising: a shell, an active phased array antenna module is arranged in the shell, the active phased array antenna module is connected to a tracking control module through a down-conversion module and an up-conversion module, the tracking control module is connected to a power management module and a communication interface, the power management module is provided with a power interface, the active phased array antenna module comprises a transmitting array antenna and a receiving array antenna, the transmitting array antenna adopts 256 transmitting array elements, the antenna polarization mode is circular polarization, each array element is followed by a shifter and an attenuator, the amplitude and phase consistency of the antenna array element is corrected by adjusting the phase shifter and the attenuator, and the antenna beam pointing is controlled at the same time, the 256 array elements are finally combined into a radio frequency input port and connected to the up-conversion module; the receiving array antenna adopts 256 receiving array elements, the antenna polarization mode is circular polarization, and each unit antenna passes through a low noise amplifier and a filter.

[0005] Furthermore, the down-conversion module and the up-conversion module are loaded with the up-conversion module in order to convert the intermediate frequency output signal of the modem into a radio frequency signal and transmit it through the array antenna; similarly, the down-conversion module outputs the intermediate frequency signal, wherein the three beams of the receiving array antenna are respectively connected to the three-way frequency conversion module and sent to the modem, and the fourth beam of the receiving antenna sends out the radio frequency signal and is connected to the down-conversion module, and then undergoes AD sampling and is sent to the antenna control board for DBF processing.

[0006] Furthermore, the tracking control module includes an antenna control module: using the terminal attitude data output by the attitude sensor and the position data of the GPS / Beidou positioning terminal, combined with the real-time position of the satellite, the real-time relative position of the antenna and the satellite is calculated, and then the phase shifter in the antenna transceiver component is controlled according to the antenna control board to control the beam pointing.

[0007] Furthermore, the tracking control module includes a posture sensor module: providing posture information of the terminal, including heading angle, pitch angle, and roll angle information.

[0008] Furthermore, the power management module provides power to each module through DC / DC according to the power provided by the terminal carrier.

[0009] Furthermore, the shell is arranged in a three-layer structure of upper, middle and lower layers. The uppermost layer is the active phased array module and BD / GPS module, the middle layer is the frequency conversion module, and the lowermost layer is the attitude sensor module and the power supply module.

[0010] Compared with the existing technology, the beneficial effects of the present invention are: the satellite communication terminal using the Ka-band satellite phased array antenna has the advantages of small size, light weight, high gain, low power consumption and strong anti-interference ability, and adopts a multi-beam phased array antenna in the form of antenna multiplexing, which can ensure communication continuity and stability in real time.

[0011] Modular design: Based on the current 8*8 transceiver module, further optimize the performance to achieve the advantages of easy assembly and reconfiguration of the module.

[0012] Lightweight design: Based on different scenarios and UAV payload requirements, the design is further optimized to provide technical support for the miniaturization and lightweight design of target equipment.

[0013] Multi-beam and large bandwidth design: Verify large bandwidth communications under fast movement (currently for high-orbit satellites) and low-orbit satellite tracking and switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] Figure 2 This is a connection diagram of the utility model

[0016] Figure 3 This is a schematic diagram of the installation of the present utility model.

[0017] Figure 4 This is a schematic diagram of the down-conversion channel circuit of the utility model.

[0018] Figure 5 This is a schematic diagram of the up-conversion channel circuit of the utility model.

[0019] Figure 6 This is a schematic diagram of the AD sampling circuit of the present utility model. DETAILED DESCRIPTION

[0020] In order to make the technical means for realizing the present invention, the creative features, the purpose and the effect easily understood, the present invention is further explained below in conjunction with specific illustrations. In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components.

[0021] Example 1

[0022] like Figures 1 to 6 As shown, a Ka-band multi-beam satellite communication terminal includes: a shell, an active phased array antenna module is provided in the shell, the active phased array antenna module is connected to a tracking control module through a down-conversion module and an up-conversion module, the tracking control module is connected to a power management module and a communication interface, the power management module is provided with a power interface, the active phased array antenna module includes a transmitting array antenna and a receiving array antenna, the transmitting array antenna uses 256 transmitting array elements, the antenna polarization mode is circular polarization, each array element is followed by a shifter and an attenuator, the antenna array element amplitude and phase consistency is corrected by adjusting the phase shifter and attenuator, and the antenna beam pointing is controlled at the same time, the 256 array elements are finally combined into a radio frequency input port and connected to the up-conversion module; the receiving array antenna uses 256 receiving array elements, the antenna polarization mode is circular polarization, and each unit antenna passes through a low noise amplifier and a filter.

[0023] Example 2

[0024] like Figures 1 to 6 As shown, a Ka-band multi-beam satellite communication terminal includes: a shell, an active phased array antenna module is provided in the shell, the active phased array antenna module is connected to a tracking control module via a down-conversion module and an up-conversion module, the tracking control module is connected to a power management module and a communication interface, the power management module is provided with a power interface, the active phased array antenna module includes a transmitting array antenna and a receiving array antenna, the down-conversion module and the up-conversion module are loaded with an up-conversion module to convert the intermediate frequency output signal of the modem into a radio frequency signal and transmit it through the array antenna; similarly, the down-conversion module outputs an intermediate frequency signal, wherein the three beams of the receiving array antenna are respectively connected to the three-way frequency conversion module and sent to the modem, and the fourth beam of the receiving antenna respectively sends out radio frequency signals, which are connected to the down-conversion module, undergo AD sampling, and are sent to the antenna control board for DBF processing.

[0025] Example 3

[0026] like Figures 1 to 6As shown, a Ka-band multi-beam satellite communication terminal includes: a shell, an active phased array antenna module is provided in the shell, the active phased array antenna module is connected to a tracking control module via a down-conversion module and an up-conversion module, the tracking control module is connected to a power management module and a communication interface, the power management module is provided with a power interface, the active phased array antenna module includes a transmitting array antenna and a receiving array antenna, and the tracking control module includes an antenna control module: the terminal attitude data output by the attitude sensor and the position data of the GPS / Beidou positioning terminal are combined with the real-time position of the satellite to calculate the real-time relative position of the antenna and the satellite, and then the phase shifter in the antenna transceiver assembly is controlled by the antenna control board to control the beam pointing.

[0027] Example 4

[0028] like Figures 1 to 6 As shown, a Ka-band multi-beam satellite communication terminal includes: a shell, an active phased array antenna module is provided in the shell, the active phased array antenna module is connected to a tracking control module via a down-conversion module and an up-conversion module, the tracking control module is connected to a power management module and a communication interface, the power management module is provided with a power interface, the active phased array antenna module includes a transmitting array antenna and a receiving array antenna, and the tracking control module includes a posture sensor module: providing posture information of the terminal, providing information including heading angle, pitch angle, and roll angle.

[0029] Example 5

[0030] like Figures 1 to 6 As shown, a Ka-band multi-beam satellite communication terminal includes: a shell, an active phased array antenna module is provided in the shell, the active phased array antenna module is connected to a tracking control module via a down-conversion module and an up-conversion module, the tracking control module is connected to a power management module and a communication interface, the power management module is provided with a power interface, the active phased array antenna module includes a transmitting array antenna and a receiving array antenna, and the power management module provides power to each module through DC / DC according to the power provided by the terminal carrier.

[0031] Example 6

[0032] like Figures 1 to 6As shown, a Ka-band multi-beam satellite communication terminal includes: a shell, an active phased array antenna module is provided in the shell, the active phased array antenna module is connected to a tracking control module via a down-conversion module and an up-conversion module, the tracking control module is connected to a power management module and a communication interface, the power management module is provided with a power interface, the active phased array antenna module includes a transmitting array antenna and a receiving array antenna, and the shell is arranged in a three-layer structure of upper, middle and lower layers, the top layer is the active phased array array module and BD / GPS module, the middle layer is the frequency conversion module, and the bottom layer is the attitude sensor module and the power module.

[0033] The tracking of the phased array antenna adopts program guidance. The tracking board receives the information forwarded by the data transmission subsystem (the carrier's orbit information, timing information, carrier heading angle, roll angle, and pitch angle) and the longitude of the satellite, and calculates the azimuth and pitch angle of the antenna pointing to the satellite in real time. It converts them into azimuth and pitch angle values in the polar coordinate system in real time, and uses the converted antenna pointing as the target angle to control the beam pointing so that the beam direction is aligned with the satellite.

[0034] Program tracking is a control algorithm used to calculate the antenna beam pointing angle in real time based on the sensors on the carrier, and control the antenna beam pointing so that the antenna beam direction always points to the satellite when the carrier is in motion.

[0035] The biggest advantage of program tracking is that its tracking technology can point directly to the satellite without being affected by obstructions and can restore communication with the satellite in time after the obstruction ends.

[0036] The specific implementation of program tracking is: combining the longitude and latitude of the synchronous satellite and the geographic longitude and latitude of the carrier measured by Beidou / GPS to solve the antenna beam pointing angle in the geographic coordinate system, and then comparing the collected carrier's attitude information to solve the antenna beam pointing angle in the carrier coordinate system.

[0037] The multi-beam array antenna adopts a multiplexing form. Each receiving antenna is divided into four channels. Each channel contains a shifter and attenuator for phase and amplitude control to form a receiving beam. Similarly, the four channels in each antenna are synthesized with the one channel split by other antennas to form four receiving beams, supporting simultaneous communication with multiple satellites.

[0038] This utility model mainly supports low-orbit satellite Internet communication services that can cover the world, have low latency, and high bandwidth, and will be widely used in remote area communications, marine operations, and aviation broadband fields; it uses multi-beam reception to achieve real-time beam switching to ensure communication continuity.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A Ka-band multi-beam satellite communication terminal, comprising: The shell is characterized in that: an active phased array antenna module is provided in the shell, and the active phased array antenna module is connected to the tracking control module through a down-conversion module and an up-conversion module. The tracking control module is connected to a power management module and a communication interface, and the power management module is provided with a power interface. The active phased array antenna module includes a transmitting array antenna and a receiving array antenna. The transmitting array antenna adopts 256 transmitting array elements, and the antenna polarization mode is circular polarization. Each array element is followed by a shifter and an attenuator. The amplitude and phase consistency of the antenna array element is corrected by adjusting the phase shifter and the attenuator, and the antenna beam pointing is controlled at the same time. The 256 array elements are finally combined into a radio frequency input port and connected to the up-conversion module; the receiving array antenna adopts 256 receiving array elements, and the antenna polarization mode is circular polarization. Each unit antenna passes through a low noise amplifier and a filter.

2. The Ka-band multi-beam satellite communication terminal according to claim 1, wherein: The down-conversion module and the up-conversion module are loaded with the up-conversion module in order to convert the intermediate frequency output signal of the modem into a radio frequency signal and transmit it through the array antenna; similarly, the down-conversion module outputs the intermediate frequency signal, wherein the three beams of the receiving array antenna are respectively connected to the three-way frequency conversion module and sent to the modem, and the fourth beam of the receiving antenna sends out the radio frequency signal and connects to the down-conversion module, and then undergoes AD sampling and is sent to the antenna control board for DBF processing.

3. The Ka-band multi-beam satellite communication terminal according to claim 1, wherein: The tracking control module includes an antenna control module: it uses the terminal attitude data output by the attitude sensor and the position data of the GPS / Beidou positioning terminal, and then combines them with the real-time position of the satellite to calculate the real-time relative position of the antenna and the satellite, and then controls the phase shifter in the antenna transceiver component to control the beam pointing according to the antenna control board.

4. The Ka-band multi-beam satellite communication terminal according to claim 1, wherein: The tracking control module includes a posture sensor module: providing posture information of the terminal, including heading angle, pitch angle, and roll angle information.

5. The Ka-band multi-beam satellite communication terminal according to claim 1, wherein: The power management module provides power to each module through DC / DC according to the power provided by the terminal carrier.

6. The Ka-band multi-beam satellite communication terminal according to claim 1, characterized in that: The shell is arranged in a three-layer structure of upper, middle and lower layers. The uppermost layer is the active phased array module and BD / GPS module, the middle layer is the frequency conversion module, and the lowermost layer is the attitude sensor module and the power supply module.

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