CN209766656U - X-waveband phased-array antenna for satellite-ground high-speed data transmission of commercial satellite - Google Patents
X-waveband phased-array antenna for satellite-ground high-speed data transmission of commercial satellite Download PDFInfo
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- CN209766656U CN209766656U CN201920792640.9U CN201920792640U CN209766656U CN 209766656 U CN209766656 U CN 209766656U CN 201920792640 U CN201920792640 U CN 201920792640U CN 209766656 U CN209766656 U CN 209766656U
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Abstract
The present invention relates to a data transfer antenna for a commercial satellite, and more particularly to a phased array antenna for high speed data transmission for use with a commercial satellite. An X-band phased array antenna for satellite-to-ground high speed data transmission for a commercial satellite, comprising: the 4 x 4 ═ 16 antennas form an antenna array through arrangement, a transmitting assembly formed by a phase shifter and an amplifier is connected behind each antenna, the transmitting assembly calculates the feeding phase of each antenna in the 16 antennas according to the direction of the ground station through a beam controller, and the phase shifter behind each antenna is adjusted through the controller. The utility model discloses an azimuth angle of pitch control range is big, and the volume is littleer, and weight is lighter.
Description
Technical Field
The present invention relates to a data transfer antenna for a commercial satellite, and more particularly to a phased array antenna for high speed data transmission for use with a commercial satellite.
Background
With the development of aerospace technology in China, various civil commercial satellites for earth observation are more and more, and the earth observation data volume is larger and larger. Due to the problems of rocket launching thrust and payload volume, the commercial small satellite needs high launching power, small volume and light weight of the whole satellite, so that the data transmission antenna also needs to have the characteristics of high launching power, small volume, low power consumption, light weight and the like.
The traditional data transmission antenna generally has two systems, one is an S-band data transmission system, and is limited by that the bandwidth is generally only used for data transmission at a rate of less than hundred mega; the other is an X-band data transmission system which is suitable for data transmission with medium and high code rate. In the form of an antenna, the conventional data transmission antenna has two types, namely a wide-beam low-gain antenna and a fixed narrow-beam high-gain antenna. The wide beam antenna is generally connected with a high-power solid-state amplifier or a traveling wave tube amplifier to improve the transmitting power due to low gain; although the fixed narrow-beam high-gain antenna has high gain and small transmitting power, the beam is narrow and the coverage area to the ground is not enough, and the antenna beam must be always aligned to the ground station by changing the attitude of the satellite, which puts an extremely high requirement on the attitude control of the satellite and also influences the main task of the satellite on-ground observation.
The commercial satellite of the X-band data transmission system has high gain and low power consumption; the beam pointing direction can be adjusted according to the direction of the target by the rapid adjustment capability of the beam pointing direction; the device has the characteristics of small volume, light weight and the like, but the device still has the defects of limited azimuth angle and pitch angle range, and a power amplifier is used, so that the volume and the weight have a space for further reducing.
Disclosure of Invention
The utility model aims at solving the above-mentioned problem that prior art exists, provide a commercial satellite high-speed data transmission is with X wave band phased array antenna. The utility model discloses an azimuth angle of pitch control range is big, and the volume is littleer, and weight is lighter.
The utility model discloses the purpose realizes like this: an X-band phased array antenna for satellite-to-ground high speed data transmission for a commercial satellite, comprising: the 4 x 4 ═ 16 antennas form an antenna array through arrangement, a transmitting assembly formed by a phase shifter and an amplifier is connected behind each antenna, the transmitting assembly calculates the feeding phase of each antenna in the 16 antennas according to the direction of the ground station through a beam controller, and the phase shifter behind each antenna is adjusted through the controller.
The commercial satellite-ground high-speed data transmission X-waveband phased-array antenna is characterized in that a triangular grid array is used for the antenna array, every three antennas form an isosceles triangle, the length dx of the bottom edge of the triangle is about 0.5-0.65 lambda, the height dy of the triangle is about 0.42-0.58 lambda, and lambda is the wavelength corresponding to the working frequency of the antenna.
The commercial satellite-ground high-speed data transmission X-band phased array antenna is characterized in that the controller adjusts the phase shifter through a feed network for transmitting radio frequency signals.
The commercial satellite earth high-speed data transmission is provided with an X-waveband phased array antenna, the beam controller is powered by an independent power supply, and the input voltage of the power supply is 28V.
The commercial satellite-ground high-speed data transmission X-waveband phased array antenna is characterized in that each antenna in the antenna array is connected with a transmitting component through an SMP interface.
The utility model discloses a X wave band phased array antenna has replaced traditional low-gain double-wire helical antenna and the fixed narrow beam single armed helical antenna of high-gain, adopt 4X 4 become 16 antennas and constitute the antenna array through appropriate arrangement, every antenna has all connected one at the back and has moved looks ware and amplifier, and calculate the feed phase place of every antenna in 16 antennas according to the direction of ground station through the controller, adjust the latter looks ware of every antenna and make the electromagnetic wave that 16 antennas launch realize the electromagnetic wave homophase stack in the direction at ground station place through the controller, just so can accomplish the continuous tracking of high-gain wave beam to ground station position, realize the high-speed data transmission of satellite load data to ground station, the utility model discloses have antenna gain height, equivalent transmitting power reaches 22.5dBW, antenna radiation direction is at azimuth 360, the pitch angle is flexibly adjustable within 60 degrees, a high-power amplifier connected behind the traditional antenna is omitted, and the antenna has the advantages of small volume, light weight, low power consumption and the like. The specific technical indexes are shown in table 1.
Table 1 technical indices:
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the antenna array.
Detailed Description
Referring to fig. 1, an X-band phased array antenna for satellite-ground high-speed data transmission of a commercial satellite comprises: 4, 4-16 antennas are formed by arranging an antenna array 1, a transmitting component 3 formed by a phase shifter and an amplifier is connected behind each antenna, the transmitting component calculates the feeding phase of each antenna in 16 antennas according to the direction of a ground station through a beam controller 3, and the phase shifter behind each antenna is adjusted through the controller.
Referring to fig. 2, the X-band phased array antenna for high-speed data transmission in satellite-ground of commercial satellite is a triangular grid array for the antenna array, wherein every three antennas 6 form an isosceles triangle, the base side length dx of the triangle is about 0.5-0.65 λ, and the height dy of the triangle is about 0.42-0.58 λ, where λ is the wavelength corresponding to the operating frequency of the antenna.
The commercial satellite earth high-speed data transmission X-band phased array antenna uses the controller to adjust the phase shifter through the feed network 4 for transmitting radio frequency signals.
The commercial satellite earth high-speed data transmission is provided with an X-waveband phased array antenna, the beam controller is powered by an independent power supply 5, and the input voltage of the power supply is 28V.
The commercial satellite-ground high-speed data transmission X-waveband phased array antenna is characterized in that each antenna in the antenna array is connected with a transmitting component through an SMP interface.
Example (b):
The design mode of the antenna unit adopts the design of an X-band dielectric horn antenna, energy is introduced into a rectangular waveguide structure of the antenna through an SMP (symmetrical multi processing) feed pin at the tail end of the antenna, then electromagnetic energy is cut into two parts of linearly polarized waves with equal energy and 90-degree fragrance difference by loading a circularly polarized piece, and the two parts of linearly polarized waves are spatially synthesized to form left-handed or right-handed circularly polarized waves; the whole array adopts 4 × 4 ═ 16 array elements, a triangular distribution array is adopted to reduce the coupling between the units to realize better axial ratio performance and higher array combining efficiency, the axial ratio performance of the antenna array is further improved in a secondary rotation array combining mode, so that the requirement of polarization multiplexing is met, the appearance of the real array is in rectangular distribution, and the space between the units does not have grating lobes within the range of +/-60 degrees.
The transmitting component 2 is composed of four same four-channel X-band transmitting modules, and mainly realizes the shunting, phase shifting and amplification of radio frequency signals and finally sends the radio frequency signals to an antenna. Each transmitting module comprises a radio frequency circuit and a control circuit. The radio frequency circuit comprises a common end drive amplifier, a four-in-one Wilkinson power divider, a numerical control phase shifter, a final stage amplifier, an isolator, a high-frequency circuit board and a shell; the control part mainly comprises a debit chip, a three-eight decoder, a register and the like.
The feed network 3 is composed of two stages of one-to-two Wilkinson power dividers, firstly, the radio-frequency signal is divided into two parts through the one-stage one-to-two Wilkinson power divider, and then the two one-to-two Wilkinson power dividers are cascaded to realize one-to-four power distribution.
The beam control unit 4 mainly functions to: 1) angle resolving, namely calculating the phase of each antenna unit according to the antenna beam pointing angle information, and obtaining control data of the phase shifter in each transmitting assembly by using table lookup to complete control of the phase shifter; 2) and power supply conversion for providing required power supply for each circuit in the beam control unit.
The hardware mainly comprises an FPGA circuit, a power supply circuit, a clock circuit, a downloading circuit, a configuration chip, a FLASH memory, an RS422 communication interface and the like.
FPGA circuit
Xilinx XQR4VSX55 chips were used as core control chips. The series of chips have advanced system integration capability in the industry, low power consumption, high speed and rich connection functions, and can realize the lowest total cost suitable for mass application.
Power supply circuit of beam control unit
The FPGA power supply circuit is composed of an FPGA power supply circuit and a memory power supply circuit. 3.3V, 2.5V, 1.8V and 1.25V required by the FPGA and the storage circuit are mainly generated.
FLASH memory
For storing amplitude phase data of the antenna elements.
The clock circuit is used for providing 50MHz working clock for the FPGA.
Download interface
And the JTAG downloading interface is used for downloading the program into the FPGA by the PC, and simultaneously, the program can be solidified in the configuration chip.
Configuration circuit
When the FPGA program is lost due to power failure, the configuration circuit stores the FPGA program in a configuration chip, and the FPGA automatically reads the FPGA program from the configuration chip after the FPGA program is powered on.
The wave control unit software mainly comprises: instruction receiving module, telemetry data sending module, instruction processing module, pointing accuracy correction, function calculation module, phase compensation module, phase shifter interface module, phase shifter chip direct control module, parameter setting module, reset module, instruction feedback module and other instruction receiving modules
And the instruction receiving module receives serial port data sent by the task processor according to a communication protocol, judges a frame head and a frame tail and checks.
Telemetry data transmission module
And receiving information required to be returned by the instruction feedback module, and sending the information to the task processor according to the communication protocol. Instruction processing module
And judging the instruction according to the information received by the instruction receiving module, and processing the instruction and distributing and coordinating the task.
Correction of pointing accuracy
And when the pointing precision correction module receives correct angle information, mapping the received angle data to a new pointing angle according to an interpolation algorithm and correction data. The correction data is provided by the complete machine test, and the interpolation algorithm is one-dimensional linear interpolation.
Function calculation module
And the function calculation module calculates corresponding sine and cosine values according to the corrected pointing angle.
Phase calculation module
And the phase calculation module calculates the phase value of each channel according to the pointing angle and the trigonometric function value.
Phase compensation module
The phase compensation module adds the result of the phase calculation to the channel calibration data and the phase compensation data. Phase shifter interface module
The phase shifter interface module directly controls the phase shifter and can switch between phase distribution and debugging. And when the phase distribution module is used, the phase of each channel is controlled to be output in a time-sharing manner.
Phase shifter chip direct control module
The method is used for the task processor to directly debug the phase shifter chip.
Parameter setting module
The pointing correction data and the phase compensation data are stored, and the data writing and replacement can be controlled by upper computer software.
Reset module
The power-on initial reset and instruction reset functions are realized, and the mode adopts asynchronous reset and synchronous release.
Instruction feedback module
And returning temperature data, phase distribution results and the like.
The power supply unit 5 is mainly composed of a DC-DC device, and is provided with a peripheral filter circuit, a protection circuit, and a soft start circuit. The power supply module converts the external +30V power supply into a secondary power supply required by the interior and components of the product. Power supply protection design
The input position of the +30V power supply bus is provided with a fuse to protect the power supply bus, so that the power supply bus is prevented from being damaged by accidental short circuit of a product.
Surge suppression measures
An EMI filter and a DC-DC power supply inlet in the product both comprise energy storage filter capacitors, and the EMI filter and the DC-DC power supply inlet are short-circuited (virtual short) at the moment of power-on, so that large surge current is generated to impact a fuse and a power bus, and a surge suppression circuit is designed to limit the power-on surge current.
Power supply conversion
The 28V power supply is converted into a voltage value required by the transmitting component 2 and the wave control unit 4.
Secondary power supply filter design
And II-type secondary power supply filtering is designed at the rear end of the DC-DC, and the influence of DC-DC switching noise on a digital circuit is inhibited by matching large and small capacitors and magnetic beads. And a secondary power ground is used for arranging a filter capacitor on the shell to inhibit common-mode interference.
And a bypass capacitor is arranged at the rear end of the LDO and near each digital circuit power supply pin, so that the influence of high-speed switching of the circuit on a secondary power supply is suppressed.
Secondary power distribution design
The power module provides 5V and +8V power supply for the wave control assembly, and the control module provides control signals for the wave control assembly. In order to prevent the power supply of the wave control assembly and the accidental state caused by the instability of the control signal in the power-on process, the scheme is designed to control the power supply of the wave control assembly. And controlling the +/-5V and +8V power supply of the wave control component by using an Inhibit enable control pin of the DC-DC.
Claims (5)
1. An X-band phased array antenna for satellite-to-ground high speed data transmission for a commercial satellite, comprising: the 4 x 4 ═ 16 antennas form an antenna array through arrangement, a transmitting assembly formed by a phase shifter and an amplifier is connected behind each antenna, the transmitting assembly calculates the feeding phase of each antenna in the 16 antennas according to the direction of the ground station through a beam controller, and the phase shifter behind each antenna is adjusted through the controller.
2. The commercial satellite land high-speed data transmission X-band phased array antenna as claimed in claim 1, wherein said antenna array is a triangular grid array, each three antennas form an isosceles triangle, the base length dx of the triangle is 0.5-0.65 λ, and the height dy of the triangle is 0.42-0.58 λ, where λ is the wavelength corresponding to the operating frequency of the antenna.
3. The commercial satellite-ground high-speed data transmission X-band phased array antenna of claim 1, wherein said controller adjusts said phase shifters through a feed network that transmits radio frequency signals.
4. The commercial satellite-ground high-speed data transmission X-band phased array antenna of claim 1, wherein said beam controller is powered by a separate power supply having an input voltage of 28V.
5. The commercial satellite-ground high-speed data transmission X-band phased array antenna of claim 1, wherein each antenna in said antenna array is interfaced with a transmit module using an SMP interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920792640.9U CN209766656U (en) | 2019-05-29 | 2019-05-29 | X-waveband phased-array antenna for satellite-ground high-speed data transmission of commercial satellite |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920792640.9U CN209766656U (en) | 2019-05-29 | 2019-05-29 | X-waveband phased-array antenna for satellite-ground high-speed data transmission of commercial satellite |
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| CN209766656U true CN209766656U (en) | 2019-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071374A (en) * | 2019-05-29 | 2019-07-30 | 上海京济通信技术有限公司 | Commercial satellite star ground high-speed digital transmission X-band phased array antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071374A (en) * | 2019-05-29 | 2019-07-30 | 上海京济通信技术有限公司 | Commercial satellite star ground high-speed digital transmission X-band phased array antenna |
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