CN113782971A - Phased array antenna beam control method, system and storage medium - Google Patents

Phased array antenna beam control method, system and storage medium Download PDF

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Publication number
CN113782971A
CN113782971A CN202110935350.7A CN202110935350A CN113782971A CN 113782971 A CN113782971 A CN 113782971A CN 202110935350 A CN202110935350 A CN 202110935350A CN 113782971 A CN113782971 A CN 113782971A
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wave
wave control
code table
control code
target
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陈雅珍
李波
吴昕颖
金星
张剑
王杨
闫宁
李树
谢涛
彭媛媛
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Beijing Commsat Technology Development Co Ltd
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Beijing Commsat Technology Development Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/28—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the amplitude
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
    • H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
    • H01Q3/38—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters the phase-shifters being digital

Abstract

The embodiment of the invention discloses a phased array antenna beam control method, which comprises the following steps: the wave control mother board receives a switching control instruction, a target wave control code table corresponding to a to-be-switched wave beam which points to the switching requirement on the phased array antenna is searched from a pre-stored information table according to the received switching control instruction, and the target wave control code table is distributed to at least one wave control daughter board; after receiving the target wave control code table, the wave control sub-board determines and adjusts the target amplitude and the target phase of each array element included in the wave beam to be cut through the target wave control code table, so that the phased array antenna realizes the wave beam pointing switching by adjusting the amplitude and the phase of each array element included in the wave beam to be cut. The phased array antenna beam control method provided by the embodiment of the invention can control a plurality of beams simultaneously, and realize rapid and accurate beam pointing switching.

Description

Phased array antenna beam control method, system and storage medium
Technical Field
The invention relates to the technical field of satellite communication, in particular to a phased array antenna beam control method, a phased array antenna beam control system and a storage medium.
Background
With the rapid development of radio frequency and digital integrated circuit technologies, phased array antennas are increasingly widely used in satellite communication systems, radar systems, and electronic countermeasure systems. The phased array antenna performs beam pointing switching by changing the amplitude and the phase of the array unit to complete beam scanning. Therefore, the beam steering system is an important component of the phased array antenna, and directly influences the beam switching time and the beam pointing accuracy of the system.
At present, most phased array beam control systems adopt a centralized calculation control method, namely, according to the beam pointing requirement, the beam control system calculates the amplitude and the phase of each array unit in real time and completes the amplitude attenuation and phase shift control of each unit.
In the traditional phased array antenna, processors such as a DSP (digital signal processor), an FPGA (field programmable gate array) and the like are adopted to solve beam pointing angles in real time and then perform amplitude-phase control on array units, so that the solving process is complex, the consumed time is long, the switching is slow, and communication interruption can be caused to a satellite communication system, and the user experience is influenced; for a radar system, the tracking target may be lost or missed, and the target discovery probability is influenced.
Disclosure of Invention
The embodiment of the invention provides a phased array antenna beam control method, a phased array antenna beam control system and a storage medium, which can simultaneously control a plurality of beams, are applied to beam control in different scenes, realize rapid and accurate beam pointing switching, realize on-orbit reconstruction of a beam control system and optimize the performance of a phased array antenna.
In a first aspect, an embodiment of the present invention provides a phased array antenna beam control method, including:
the wave control mother board receives a switching control instruction, searches a target wave control code table corresponding to a to-be-switched wave beam which points to the switching requirement on the phased array antenna from a pre-stored information table according to the received switching control instruction, and distributes the target wave control code table to at least one wave control daughter board;
after receiving the target wave control code table, the wave control sub-board determines and adjusts the target amplitude and the target phase of each array element included in the wave beam to be cut through the target wave control code table, so that the phased array antenna realizes the wave beam direction switching by adjusting the amplitude and the phase of each array element included in the wave beam to be cut.
Further, the method includes that the wave control mother board receives a switching control instruction, searches a target wave control code table corresponding to a to-be-switched wave beam which points to a switching requirement on the phased array antenna from a pre-stored information table according to the received switching control instruction, and distributes the target wave control code table to at least one wave control daughter board, and includes:
calculating the initial address of a wave control code table corresponding to the wave beam to be cut according to the switching control instruction;
and searching a target wave control code table corresponding to the wave beam to be cut from a pre-stored information table according to the starting address of the wave control code table, and distributing the target wave control code table to a corresponding wave control daughter board.
Further, the information table is stored in a set number of memory chips; the information table comprises a wave control code table corresponding to each wave beam formed by the phased array antenna;
the influence factors of the set number of the memory chips comprise: the storage chip comprises the memory size, the number of wave beams, the total number of wave beam pointing numbers, the wave beam switching time index and the total number of array elements of the phased array antenna.
Further, the calculating a start address of a wave control code table corresponding to the beam to be cut according to the switching control instruction includes:
analyzing the switching control instruction to acquire a beam center frequency point and a beam pointing number contained in the switching control instruction;
acquiring the total number of beam pointing numbers of the phased array antenna, the total number of array elements of the phased array antenna, the number of storage bits of a digital-to-analog conversion control code and the initial position of the wave control code table stored in the at least one storage chip;
and calculating the initial address of the wave control code table corresponding to the wave beam to be cut according to the wave beam central frequency point and the wave beam direction number, the total number of the wave beam direction numbers of the phased array antenna, the total number of the array elements of the phased array antenna, the storage bit number of a digital-to-analog conversion control code and the initial position of the wave control code table stored in the at least one storage chip.
Further, the distributing the target wave control code table to the corresponding wave control daughter board includes:
and distributing the wave control code table to the corresponding wave control daughter board according to the address information in the wave control code table.
Further, after receiving the target wave control code table, the wave control daughter board determines and adjusts the target amplitude and the target phase of each array element included in the beam to be cut through the target wave control code table, including:
and extracting an amplitude-phase control code in the target wave control code table, and determining a phase shift value of the digital phase shifter and an attenuation value of the digital attenuator according to the amplitude-phase control code.
Further, after receiving the target wave control code table, the wave control daughter board determines and adjusts the target amplitude and the target phase of each array element included in the beam to be cut through the target wave control code table, and further includes:
extracting digital-to-analog conversion control codes in the wave control code table, and establishing two paths of orthogonal voltages according to the digital-to-analog conversion control codes;
and determining the target amplitude and the target phase of the corresponding array element of the phased array antenna according to the two paths of orthogonal voltages and a chip characteristic table of the vector modulator.
Further, before the wave control motherboard receives the switching control instruction, the method further includes:
testing the wave control mother board through an upper computer, and establishing the wave control code table; the wave control code table comprises the wave beam central frequency point, the wave beam pointing number, the array element row number, the array element column number and the amplitude and phase control code.
In a second aspect, an embodiment of the present invention further provides a phased array antenna beam control system, including: the wave control motherboard and at least one wave control daughter board;
the wave control mother board is connected with each wave control daughter board and used for receiving a switching control instruction, acquiring a target wave control code table corresponding to a to-be-switched wave beam with a directional switching requirement on the phased array antenna according to the received switching control instruction, and distributing the target wave control code table to the at least one wave control daughter board;
and the at least one wave control daughter board is used for determining and adjusting the target amplitude and the target phase of each array element included in the to-be-cut wave beam through the target wave control code table after the target wave control code table is received, so that the phased array antenna realizes the wave beam pointing switching by adjusting the amplitude and the phase of each array element included in the to-be-cut wave beam.
Optionally, the wave control motherboard includes a control center/upper computer interface, a first field programmable gate array chip, and a wave control daughter board interface;
the wave control motherboard receives a switching control instruction through the control center/upper computer interface;
the first field programmable gate array chip is used for calculating a target wave control code table corresponding to the wave beam to be cut according to the switching control instruction;
and the wave control mother board distributes the target wave control code table to the corresponding wave control daughter board through a wave control daughter board interface.
Optionally, the first field programmable gate array chip is specifically configured to:
analyzing the switching control instruction to acquire a beam center frequency point and a beam pointing number contained in the switching control instruction;
acquiring characteristic parameters of the phased array antenna, wherein the characteristic parameters comprise the total number of beam pointing numbers, the total number of array elements of the phased array antenna, the coordinates and the intervals of the array elements of the phased array antenna, the array arrangement mode of the phased array antenna and beam forming;
and calculating a target wave control code table corresponding to the wave beam to be cut according to the wave beam central frequency point, the wave beam pointing number and the characteristic parameters of the phased array antenna.
Optionally, the wave control motherboard further includes: a set number of memory chips;
the storage chip is used for pre-storing a wave control code table corresponding to each wave beam formed by the phased array antenna;
correspondingly, the first field programmable gate array chip is connected with each memory chip, calculates the starting address of the wave control code table corresponding to the wave beam to be cut according to the switching control instruction, and searches the target wave control code table from the memory chip according to the starting address of the wave control code table;
the influence factors of the set number of the memory chips comprise: the storage chip comprises the memory size, the number of wave beams, the total number of wave beam pointing numbers, the wave beam switching time index and the total number of array elements of the phased array antenna.
Optionally, the at least one wave control daughter board includes a wave control mother board interface, at least one digital-to-analog conversion chip, and at least one vector modulator chip, where each digital-to-analog conversion chip is connected to at least one vector modulator chip;
the wave control code table distributed by the wave control mother board is received by the at least one wave control daughter board through the wave control mother board interface;
the at least one digital-to-analog conversion chip is used for extracting digital-to-analog conversion control codes in the wave control code table and establishing two paths of orthogonal voltages according to the digital-to-analog conversion control codes;
and the at least one vector modulator chip is used for determining the amplitude and the phase of the corresponding array element of the phased array antenna according to the two paths of orthogonal voltages combined with a characteristic table of the vector modulator chip.
Optionally, the at least one digital-to-analog conversion chip is further configured to:
and receiving the corresponding wave control code table according to the address information in the wave control code table.
Optionally, the wave control daughter board further includes at least one second field programmable gate array chip, each second field programmable gate array chip is connected to at least one digital-to-analog conversion chip, and the second field programmable gate array chip is configured to receive the wave control code table distributed by the wave control mother board according to address information in the wave control code table, and then distribute the wave control code table to the at least one digital-to-analog conversion chip.
Optionally, the chip characteristic table of the vector modulator is obtained by testing the vector modulator; the vector modulator characteristic table comprises the two paths of orthogonal voltages and the amplitude and the phase of the corresponding array elements.
In a third aspect, an embodiment of the present invention further provides a phased array antenna beam control storage medium, on which a computer program is stored, where the computer program is executed by a processing device to implement the phased array antenna beam control method according to any one of the embodiments of the present invention.
The method comprises the steps that firstly, a switching control instruction is received through a wave control mother board, a target wave control code table corresponding to a to-be-switched wave beam which points to the switching requirement is searched on a phased array antenna from a pre-stored information table according to the received switching control instruction, and the target wave control code table is distributed to at least one wave control daughter board; and then after receiving the target wave control code table, the wave control sub-board determines and adjusts the target amplitude and the target phase of each array element included in the wave beam to be cut through the target wave control code table, so that the phased array antenna realizes the wave beam pointing switching by adjusting the amplitude and the phase of each array element included in the wave beam to be cut. According to the phased array antenna beam control method provided by the embodiment of the invention, the field programmable logic gate array in the wave control motherboard completes the resolving and table look-up of the control instruction, so that the wave control daughter board adjusts the amplitude and the phase of the array element according to the wave control code table, can simultaneously control a plurality of beams, is applied to the beam control of different scenes, realizes the rapid and accurate beam pointing switching, can also realize the in-orbit reconstruction of a beam control system, and optimizes the performance of the phased array antenna.
Drawings
Fig. 1 is a flowchart of a phased array antenna beam control method according to a first embodiment of the present invention;
fig. 2 is a flowchart of a method for distributing a target wave control code table in the second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a beam control system of a single FLASH chip according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a multi-FLASH-chip beam control system according to a second embodiment of the present invention;
fig. 5 is a flowchart of a wave beam control system for searching and distributing a wave control code table in the second embodiment of the present invention;
fig. 6 is a schematic structural diagram of a phased array antenna beam control system in a third embodiment of the present invention;
fig. 7 is a schematic structural diagram of a wave-controlled motherboard according to a third embodiment of the present invention;
fig. 8 is a schematic structural diagram of a wave controller board according to a third embodiment of the present invention;
fig. 9 is a structural diagram of a beam control system including an FPGA chip in a daughter board according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a phased array antenna beam control method according to an embodiment of the present invention, which is applicable to a case where a beam generated by a phased array antenna is switched and controlled, and the method can be executed by a phased array antenna beam control system. As shown in fig. 1, the method specifically comprises the following steps:
and 110, searching a target wave control code table corresponding to the wave beam to be cut from a pre-stored information table by the wave control mother board according to the received switching control instruction, and distributing the target wave control code table to at least one wave control daughter board.
The wave control motherboard may include, but is not limited to, a control center/upper computer interface, a Field Programmable Gate Array (FPGA), a memory chip (FLASH), and a wave control daughter board interface, and is configured to receive a control instruction, resolve an address of a wave control code table, and read and distribute the wave control code table. The control center/upper computer interface is connected with the control center/upper computer module, the wave control daughter board interface is connected with the wave control daughter board module, the FPGA is used for completing resolving of instruction information, address calculation, reading and distributing of a wave control code table, and the FLASH is used for completing storage of the wave control code table.
Further, the switching control instruction received by the wave control motherboard can be sent by the control center/upper computer module, and the control center/upper computer module can determine that the phased array antenna has a target beam direction corresponding to the beam to be switched which is required to be directed to switch, and then generate the switching control instruction according to the target beam direction and send the switching control instruction to the wave control motherboard.
Specifically, the phased array antenna is an antenna which changes the shape of a directional pattern by controlling the feeding phase of an array unit in the array antenna, and the direction of a beam can be changed by controlling the phase, so that the purpose of beam scanning is achieved. A wave beam (wave beam) refers to a shape formed on the surface of the earth by electromagnetic waves emitted from a satellite antenna. The phased array antenna can generate one or more beams, and for the beams needing to be subjected to pointing switching, control instructions can be generated according to the pitch angle and the azimuth angle of the target beam pointing to perform the switching of the beam pointing. The control center/upper computer module can obtain the pitch angle and the azimuth angle pointed by the target wave beam through calculation, the pitch angle and the azimuth angle are represented by the wave beam pointing number, and a wave beam switching control instruction containing the wave beam pointing number is generated and sent to the wave control motherboard.
Optionally, the wave control motherboard receives a switching control instruction sent by the control center/upper computer module through the control center/upper computer interface, the FPGA parses the switching control instruction, reads a corresponding wave control code table from the FLASH according to the switching control instruction, and finally distributes the wave control code table to the wave control daughter board through the wave control daughter board interface.
In this embodiment, the method for searching, by the wave control motherboard, a target wave control code table corresponding to a to-be-switched wave beam that is required to point to switching and exists on the phased array antenna from a pre-stored information table according to the received switching control instruction, and distributing the target wave control code table to the at least one wave control daughter board may be: calculating the initial address of a wave control code table corresponding to the wave beam to be cut according to the switching control instruction; and searching a target wave control code table corresponding to the wave beam to be cut from a pre-stored information table according to the starting address of the wave control code table, and distributing the target wave control code table to the corresponding wave control sub-board.
TABLE 1
Figure BDA0003212831360000091
Table 1 is a wave control code table in the embodiment of the present invention, as shown in table 1, assuming that a signal bandwidth is 1GHz and a frequency interval is 100MHz, a beam center frequency may be divided into 11 levels, assuming that a phased array antenna needs to cover a range of ± 50 degrees on the ground, 128 beam direction numbers may be calculated according to parameters such as a satellite orbit altitude, and each beam direction number corresponds to a beam direction pitch angle (θ) and an azimuth angle (θ)
Figure BDA0003212831360000092
) In combination, for a 64-element phased array antenna, the coordinates corresponding to each element are (1,1), (1,2) … (8,8), and each element corresponds to two digital-to-analog conversion control codes (DAC control codes) in the wave control code table.
Optionally, the switching control instruction includes a beam center frequency point and a beam direction number of a beam to be switched, the FPGA chip may analyze the beam center frequency point and the beam direction number in the switching control instruction, then calculate a start address of a corresponding wave control code table, search a corresponding target wave control code table from an information table prestored in the FLASH according to the start address of the wave control code table, and finally distribute the target wave control code table to the wave control daughter board through the wave control daughter board interface according to the address.
And step 120, after receiving the target wave control code table, the wave control daughter board determines and adjusts the target amplitude and the target phase of each array element included in the wave beam to be cut through the target wave control code table, so that the phased array antenna realizes the beam pointing switching by adjusting the amplitude and the phase of each array element included in the wave beam to be cut.
The wave control daughter board includes, but is not limited to, a wave control mother board interface, a digital-to-analog conversion chip (DAC), a Vector Modulator chip (VM) and a radio frequency interface, and is configured to receive a wave control code table sent by the wave control mother board, and complete modulation of amplitude and phase according to DAC control codes in the wave control code table. The wave control motherboard interface is connected with the wave control motherboard, the radio frequency interface is connected with the radio frequency module, the DAC chip is used for converting digital signals into analog signals and outputting the analog signals to the control end of the VM chip, and the VM chip is used for completing amplitude and phase modulation according to the analog signals sent by the DAC.
In this embodiment, after receiving the target wave control code table, the wave control daughter board determines and adjusts the target amplitude and the target phase of each array element included in the beam to be cut through the target wave control code table in a manner that: and extracting an amplitude-phase control code in the target wave control code table, and determining the phase shift value of the digital phase shifter and the attenuation value of the digital attenuator according to the amplitude-phase control code.
Optionally, the wave control code table may include an amplitude-phase control code, where the amplitude-phase control code corresponds to a target amplitude and a target phase of each array element included in the to-be-switched wave control of the phased array antenna. The wave control daughter board can obtain the amplitude-phase control code from the target wave control code table, and determines the phase shift value of the digital phase shifter and the attenuation value of the digital attenuator according to the amplitude-phase control code, thereby controlling the amplitude and the phase of the corresponding array element.
In this embodiment, after receiving the target wave control code table, the mode of determining the target amplitude and the target phase of each array element included in the beam to be cut by the wave control daughter board through the target wave control code table may also be: extracting digital-to-analog conversion control codes in a wave control code table, and establishing two paths of orthogonal voltages according to the digital-to-analog conversion control codes; and determining the amplitude and the phase of the corresponding array element of the phased array antenna according to the two paths of orthogonal voltages and the characteristic table of the chip of the vector modulator.
Optionally, the DAC chip may extract two DAC control codes from the received wave control code table, and establish two paths of orthogonal voltages (I/Q two paths of voltages) according to the two DAC control codes and send the two paths of orthogonal voltages to the VM chip. The VM chip can be an analog IQ vector modulator, the amplitude and the phase of an array element corresponding to a wave beam to be cut can be determined according to the received I/Q two-path voltage, and the corresponding relation between the amplitude and the phase of the array element and the I/Q two-path voltage is in accordance with a VM chip characteristic table.
Further, the chip characteristic table of the vector modulator is obtained by testing the vector modulator; the vector modulator characteristic table comprises two paths of orthogonal voltages and amplitudes and phases of corresponding array elements.
Optionally, the characteristic table of each VM chip is related to itself, and the VM chip characteristic table may be tested at the time of factory shipment to obtain the VM chip characteristic table, so as to form an amplitude and phase change table for voltage control, thereby determining a corresponding relationship between the amplitude and the phase and the I/Q two-path voltage values generated by the DAC. Furthermore, the VM chip characteristic table can be interpolated according to system requirements, the control precision of amplitude and phase is improved, the precision of beam switching is further improved, theoretically, the precision can be infinitely improved through interpolation, and errors are reduced.
Furthermore, after the wave control board determines the target amplitude and the target phase of each array element included in the wave beam to be cut, the radio frequency module can send the target amplitude and the target phase of each array element to the phased array antenna, so that the phased array antenna can realize the wave beam direction switching by adjusting the amplitude and the phase of each array element included in the wave beam to be cut.
The radio frequency module is a module responsible for loading and transmitting radio frequency signals. After the wave control board determines the target amplitude and the target phase of each array element included in the wave beam to be cut, the radio frequency module can send the target amplitude and the target phase to the phased array antenna, and the wave beam direction is related to the amplitude and the phase of the array elements.
In this embodiment, before the wave control motherboard receives the switching control instruction, the wave control motherboard can be tested by the upper computer to establish a wave control code table; the wave control code table comprises wave beam central frequency points, wave beam pointing numbers, array element row numbers, array element column numbers and digital-to-analog conversion control codes.
Optionally, the antenna array is assumed to be two-dimensionally arranged at equal intervals on the rectangular boundary of a rectangular grid, and the sum of the wave positions θ is designed to cover the ground
Figure BDA0003212831360000121
The angle changes the beam direction only by changing the phase of the array element, does not attenuate the amplitude, and the calculation formula of the phase shift value of each array element is as follows:
Figure BDA0003212831360000122
wherein, i and j are the row number and the column number of the array element respectively, C (i and j) is the phase shift value of the array element, theta,
Figure BDA0003212831360000123
pitch and azimuth, respectively, pointed by the beam, X ═ i × dx,Y＝j×djAre the coordinate values of the array elements, wherein dxArray element line spacing, dyIs the array element column spacing.
And testing the wave control motherboard by the upper computer according to the phase shift value and the VM characteristic table obtained by the calculation, correspondingly searching the VM chip to obtain two paths of I/Q input voltages required by a certain phase shift value, converting the I/Q input voltages into DAC control codes required by the DAC chip according to the digital-to-analog conversion relation of the DAC chip, and correspondingly storing a beam central frequency point, a beam pointing number, an array element row number, an array element column number and the DAC control codes in a FLASH so as to determine a control instruction required for switching a certain beam to a set pointing direction.
The method comprises the steps that firstly, a switching control instruction is received through a wave control mother board, a target wave control code table corresponding to a to-be-switched wave beam which points to the switching requirement is searched on a phased array antenna from a pre-stored information table according to the received switching control instruction, and the target wave control code table is distributed to at least one wave control daughter board; and then after receiving the target wave control code table, the wave control sub-board determines and adjusts the target amplitude and the target phase of each array element included in the wave beam to be cut through the target wave control code table, so that the phased array antenna realizes the wave beam pointing switching by adjusting the amplitude and the phase of each array element included in the wave beam to be cut. According to the phased array antenna beam control method provided by the embodiment of the invention, control instruction resolving and table lookup are completed through the FPGA chip in the wave control motherboard, so that the wave control daughter board adjusts the amplitude and the phase of the array element according to the wave control code table, a plurality of beams can be controlled simultaneously, the method is applied to beam control of different scenes, and rapid and accurate beam pointing switching is realized. In addition, when the system requirements change, partial channel failure, temperature drift factors and the like influence the antenna performance, on-orbit reconstruction can be carried out on wave control system software, a reconstruction instruction and a reconstruction program are injected to the satellite-borne computer through a satellite communication link, the wave control system is controlled to complete on-orbit reconstruction of the FPAG and the wave control code table, and the phased array antenna performance is optimized.
Example two
Fig. 2 is a flowchart of a method for distributing a target wave control code table in the second embodiment of the present invention, and this embodiment is applicable to a case where a wave control motherboard searches for a target wave control code table corresponding to a beam to be cut from a pre-stored information table, and distributes the target wave control code table to at least one wave control daughter board. As shown in fig. 2, the method specifically includes the following steps:
and step 111, calculating the starting address of the wave control code table corresponding to the wave beam to be cut according to the switching control instruction.
Optionally, the phased array antenna may generate one or more beams, each beam has a corresponding wave control code table, the wave control motherboard may analyze and calculate the received switching control instruction to obtain an initial address of the wave control code table corresponding to the beam to be switched, which is stored in the FLASH, and according to the address, the corresponding wave control code table may be obtained.
In this embodiment, the manner of calculating the start address of the wave control code table corresponding to the beam to be cut according to the switching control instruction may be: analyzing the switching control instruction to obtain a beam center frequency point and a beam pointing number contained in the switching control instruction; acquiring the total number of beam pointing numbers of the phased array antenna, the total number of array elements of the phased array antenna, the storage bit number of a digital-to-analog conversion control code and the initial position of a wave control code table stored in at least one storage chip; and calculating the initial address of the wave control code table corresponding to the wave beam to be cut according to the central frequency point and the direction number of the wave beam, the total number of the direction numbers of the wave beams of the phased array antenna, the total number of array elements of the phased array antenna, the number of storage bits of one digital-to-analog conversion control code and the initial position of the wave control code table stored in at least one storage chip.
Optionally, the FPGA chip in the wave control motherboard can analyze the beam center frequency point and the beam direction number in the beam switching instruction, and knowing the total number of the beam direction numbers of the phased array antenna, the total number of the array elements of the phased array antenna, the storage bit number of one digital-to-analog conversion control code, and the initial position of the wave control code table stored in at least one storage chip, the initial address of the wave control code table corresponding to the beam to be cut can be calculated, and the calculation formula is as follows:
Figure BDA0003212831360000141
in the formula, ADD is the starting address of the wave control code table corresponding to the wave beam to be cut, ADD _0 is the starting position of all the wave control code tables stored in the FLASH, num _ f0 is the analyzed wave beam center frequency point, N _ loc is the total number of the wave beam pointing numbers, N _ arr is the total number of the array elements, N _ bit is the storage bit number of a digital-to-analog conversion control code, num _ loc is the analyzed wave beam pointing number, and 2 represents two paths of voltages of I/Q.
Fig. 3 is a schematic structural diagram of a single FLASH chip beam control system in this embodiment, and as shown in the drawing, the system structure includes a wave control motherboard, a wave control daughter board, and a radio frequency module, and can control a beam to perform fast switching of beam pointing according to switching control instruction information sent by a control center/upper computer. The wave control motherboard comprises a FLASH chip, an FPGA chip and a control interface; the wave control sub-board comprises a DAC chip, a VM chip and a control interface. Taking a phased array antenna for 64-array element single-beam satellite communication load as an example, that is, N _ arr is 64; assuming a signal bandwidth of 1GHz and a frequency interval of 100MHz, the beam center frequency is divided into 11 levels, i.e., N _ f0 is 11; assuming that the phased array antenna needs to cover the range of +/-50 degrees of the ground, calculating the number of wave bits to be 128 according to parameters such as satellite orbit height and the like, namely N _ loc is 128; assuming that the beam center frequency number num _ f0 is 3, the beam direction number num _ loc is 5, and a control code of the DAC is stored with 16 bits, the start position of the wave control code table is calculated as:
ADD＝ADD_0+(3-1)×128×64×2×16+(5-1)×64×2×16，
wherein, ADD _0 is the initial position of all wave control code tables stored in FLASH.
And 112, searching a target wave control code table corresponding to the wave beam to be cut from a pre-stored information table according to the initial address of the wave control code table, and distributing the target wave control code table to the corresponding wave control sub-board.
Optionally, an information table is stored in the wave control motherboard in advance, a wave control code table of each beam is stored in the information table, and after the FPGA chip calculates an initial address of the wave control code table, the target wave control code table corresponding to the beam to be cut can be searched according to the address and then distributed to the wave control daughter board.
In this embodiment, the information table is stored in a set number of memory chips; the information table comprises a wave control code table corresponding to each wave beam formed by the phased array antenna; the factors influencing the set number of memory chips include: the memory size of the memory chip, the number of wave beams, the total number of the wave beam pointing numbers, the wave beam switching time index and the total number of the array elements of the phased array antenna are stored.
Optionally, the information table may be stored in the FLASH chip, and the information table includes a wave control code table corresponding to each beam formed by the phased array antenna. In the wave beam control system, one wave control mother board comprises at least one FLASH chip, and the number of the FLASH chips is related to the size of a chip memory, the number of wave beams, a wave beam switching time index and the number of array elements of a phased array antenna. For example, for a phased array antenna that needs to control multiple beams, the wave control code tables of multiple beams can be stored in one FLASH chip, and at this time, the FPGA chip needs to read the wave control code tables of multiple beams in sequence and control them in sequence; the wave control code table of each beam can also be stored in different FLASH chips, and at the moment, the FPGA can simultaneously read a plurality of wave control code tables and control the switching of a plurality of beams.
Fig. 4 is a schematic structural diagram of a multi-FLASH-chip beam control system in this embodiment, as shown in the figure, taking a phased array antenna for satellite communication load with 16 beams of 512 array elements as an example, that is, N _ arr is 512, and N _ f0 is 16, 16 FLASH chips may be used to connect with an FPGA, each FLASH stores a beam control code table of one beam, after the beam control system receives a beam switching instruction sent from a control center, the FPGA calculates a start address of each beam control code table, and then reads the beam control code tables of each beam in parallel from the FLASH and completes beam switching control at the same time.
In this embodiment, the method for distributing the target wave control code table to the corresponding wave control daughter board may be: and distributing the wave control code table to the corresponding wave control daughter boards according to the address information in the wave control code table.
Optionally, the address information in the wave control code table is an array element coordinate, which may be represented by an array element row number and a column number in the wave control code table, and each wave control daughter board controls a corresponding array element. When the wave control code table is distributed to the wave control sub-boards, the wave control code table of the corresponding array element of each wave control sub-board can be sent according to the row number and the column number of the array element. As shown in fig. 3, the DAC chip selected in the wave control daughter board has 32 pins, and can control 16 VM chips of a single beam simultaneously, and 64 array elements require 4 DAC chips in total. Because each DAC chip is connected with the fixed 16 VM chips, the radio frequency module to be controlled by each DAC chip is also fixed, the wave control code table corresponding to the array element is directly sent according to the connecting pins when the wave control code table is distributed, and the address does not need to be recalculated.
Fig. 5 is a flowchart of searching and distributing a wave control code table by a wave beam control system in an embodiment of the present invention, as shown in the figure, after receiving a wave beam switching control instruction, an FPGA chip parses the control instruction and calculates an initial address of the wave control code table, reads a target wave control code table from a FLASH chip according to the address, and then distributes the target wave control code table to a DAC chip in a wave control daughter board, and the DAC chip establishes a voltage according to a DAC control code in the wave control code table, so that a VM chip completes amplitude-phase control according to the voltage.
Firstly, calculating a starting address of a wave control code table corresponding to a wave beam to be cut according to a switching control instruction; and searching a target wave control code table corresponding to the wave beam to be cut from a pre-stored information table according to the initial address of the wave control code table, and distributing the target wave control code table to the corresponding wave control sub-board. The method for distributing the target wave control code table provided by the embodiment of the invention has the advantages that the wave control code table is pre-stored in FLASH, the wave control code table of the wave beam to be cut is searched by calculating the initial address of the wave control code table and then is distributed to the wave control daughter board, the DAC control code does not need to be calculated in real time, the purposes of quick searching and distribution can be achieved, the program design is simplified by pre-calculating and programming searching, the occupied resource is less, the method has strong universality and can be applied to wave beam control of different scenes. In addition, the FPGA chip can be connected with a plurality of FLASH chips, the number of the FLASH chips can be reasonably selected according to the number of wave beams, the total number of wave beam pointing numbers, the wave beam switching time index, the number of array elements of the phased array antenna and other factors, and the FPGA can simultaneously read the wave control code tables stored by the plurality of FLASH chips after calculating addresses, so that the rapid wave beam pointing switching is realized.
EXAMPLE III
Fig. 6 is a schematic structural diagram of a phased array antenna beam control system according to a third embodiment of the present invention. As shown in fig. 6, the system includes: a wave control motherboard 210 and at least one wave control daughter board 220.
And the wave control mother board 210 is connected with each wave control daughter board, and is used for receiving the switching control instruction, acquiring a target wave control code table corresponding to a to-be-switched wave beam with a directional switching requirement on the phased array antenna according to the received switching control instruction, and distributing the target wave control code table to at least one wave control daughter board.
Optionally, the phased array antenna beam control system may include a control center/upper computer module, and the control center/upper computer module may obtain a pitch angle and an azimuth angle pointed by the target beam through calculation, represent the pitch angle and the azimuth angle by the beam pointing number, generate a beam switching control instruction including the beam pointing number, and send the beam switching control instruction to the wave control motherboard 210.
Optionally, the wave control motherboard 210 includes a control center/upper computer interface, a first field programmable gate array chip, and a wave control daughter board interface. Wherein, the wave control motherboard receives a switching control instruction through a control center/upper computer interface; the first field programmable gate array chip is used for calculating a target wave control code table corresponding to the wave beam to be cut according to the switching control instruction; and the wave control mother board distributes the target wave control code table to the corresponding wave control daughter board through the wave control daughter board interface.
Fig. 7 is a schematic structural diagram of a wave control motherboard according to an embodiment of the present invention, and as shown in the figure, the wave control motherboard 210 may include, but is not limited to, a control center/upper computer interface, a first Field Programmable Gate Array (FPGA), and a wave control daughter board interface, and is configured to complete receiving of a control instruction, address resolution of a wave control code table, and reading and distributing of the wave control code table. The control center/upper computer interface is connected with the control center/upper computer module, and the wave control motherboard 210 can receive a switching control instruction sent by the control center/upper computer module through the control center/upper computer interface; the first FPGA chip is used for completing resolving of a switching control instruction, address calculation of a wave control code table, reading and distribution of the wave control code table; the wave control daughter board interface is connected to the wave control daughter board module, and the wave control motherboard 210 can distribute the wave control code table corresponding to the wave beam to be cut to the wave control daughter board through the wave control daughter board interface.
Optionally, the wave-controlled motherboard 210 further includes a set number of memory chips; the storage chip is used for storing an information table, and the information table comprises a wave control code table corresponding to each wave beam formed by the phased array antenna; the first field programmable gate array chip is connected with each storage chip; the factors influencing the set number of memory chips include: the memory size of the memory chip, the number of wave beams, the total number of the wave beam pointing numbers, the wave beam switching time index and the number of array elements of the phased array antenna are stored.
Specifically, the wave control motherboard 210 stores an information table in advance, the information table stores a wave control code table of each beam, and the wave control motherboard 210 includes a set number of memory chips (FLASH chips) for storing an information table including the wave control code table corresponding to each beam. The first FPGA chip is connected with each FLASH chip and can read the wave control code table from the FLASH according to the wave beam switching control instruction.
Furthermore, in the beam control system, the number of the FLASH chips is related to the chip memory size, the number of the beams, the total number of the beam pointing numbers, the beam switching time index, the number of the array elements of the phased array antenna, and other factors. The memory occupied by the wave control code table in the FLASH chip can be calculated by the following formula:
N_flash＝N_f0×N_loc×N_arr×2×N_bit，
the method comprises the steps that N _ FLASH is the size of a memory occupied by a wave control code table in a FLASH chip, N _ f0 is the total number of wave beam frequency levels, N _ arr is the total number of wave beam pointing numbers, N _ arr is the total number of phased array antenna array elements, and N _ bit is the storage bit number of a digital-to-analog conversion control code.
The more wave beams generated by the phased array antenna, the more wave control code tables required by wave beam control, and the more information in the wave control code tables, the more FLASH chip memories are required. Under the condition of meeting the storage requirement, the number of the FLASH chips can be reasonably increased so as to reduce the beam switching time. For example, for a phased array antenna that needs to control multiple beams, the wave control code tables of multiple beams may be stored in one FLASH chip, and at this time, the first FPGA chip needs to read the multiple beam wave control code tables in sequence and control them in sequence; the wave control code table of each beam can also be stored in different FLASH chips, and at the moment, the first FPGA can simultaneously read a plurality of wave control code tables and control the switching of a plurality of beams.
Optionally, the first field programmable gate array chip is specifically configured to: analyzing the switching control instruction to obtain a beam center frequency point and a beam pointing number contained in the switching control instruction; acquiring characteristic parameters of the phased array antenna, wherein the characteristic parameters comprise the total number of beam pointing numbers, the total number of array elements of the phased array antenna, the coordinates and the intervals of the array elements of the phased array antenna, the array arrangement mode of the phased array antenna and beam forming; and calculating a target wave control code table corresponding to the wave beam to be cut according to the wave beam central frequency point, the wave beam pointing number and the characteristic parameters of the phased array antenna.
Specifically, the first FPGA chip may analyze a beam center frequency point and a beam direction number in the beam switching instruction, and knowing a total number of the beam direction numbers of the phased array antenna, a total number of array elements of the phased array antenna, a storage bit number of one digital-to-analog conversion control code, and an initial position of the wave control code table stored in at least one storage chip, the initial address of the target wave control code table corresponding to the beam to be switched may be calculated, where the calculation formula is as described in the above embodiment.
Optionally, the wave control motherboard 210 further includes an upper computer interface, a power interface, a clock interface, an RS422-SPI conversion circuit, and a power modulation circuit, where the upper computer interface is connected to the upper computer module and is configured to receive a control instruction when testing the wave control motherboard, the RS422-SPI conversion circuit is configured to complete conversion of instruction information, and the power modulation circuit is configured to complete voltage modulation and control.
And the at least one wave control daughter board 220 is configured to determine and adjust a target amplitude and a target phase of each array element included in the to-be-cut wave beam through the target wave control code table after receiving the target wave control code table, so that the phased array antenna realizes the beam pointing switching by adjusting the amplitude and the phase of each array element included in the to-be-cut wave beam.
The at least one wave control daughter board 220 comprises a wave control mother board interface, at least one digital-to-analog conversion chip and at least one vector modulator chip, wherein each digital-to-analog conversion chip is connected with at least one vector modulator chip; at least one wave control daughter board 220 receives a wave control code table distributed by the wave control mother board 210 through a wave control mother board interface; the at least one digital-to-analog conversion chip is used for extracting digital-to-analog conversion control codes in the wave control code table and establishing two paths of orthogonal voltages according to the digital-to-analog conversion control codes; and the at least one vector modulator chip is used for determining the amplitude and the phase of the corresponding array element of the phased array antenna according to the two paths of orthogonal voltages and the characteristic table of the vector modulator chip.
Fig. 8 is a schematic structural diagram of a wave control daughter board according to an embodiment of the present invention, and as shown in the figure, the wave control daughter board 220 includes, but is not limited to, a wave control motherboard interface, a digital-to-analog conversion chip (DAC), a Vector Modulator chip (VM), and a radio frequency interface, and is configured to receive a wave control code table sent by the wave control motherboard, and complete modulation of amplitude and phase according to a DAC control code in the wave control code table. The wave control motherboard interface is connected with the wave control motherboard, the radio frequency interface is connected with the radio frequency module, the DAC chip is used for converting digital signals into analog signals and outputting the analog signals to the control end of the VM chip, and the VM chip is used for completing amplitude and phase modulation according to the analog signals sent by the DAC.
Further, the DAC chip may extract two DAC control codes from the received wave control code table, and establish two paths of orthogonal voltages (I/Q two paths of voltages) according to the two DAC control codes and send the two paths of orthogonal voltages to the VM chip. The VM chip can be an analog IQ vector modulator, the amplitude and the phase of an array element corresponding to a wave beam to be cut can be determined according to the received two paths of voltages of the I/Q and a VM chip characteristic table, and the corresponding relation between the amplitude and the phase of the array element and the two paths of voltages of the I/Q is in accordance with the VM chip characteristic table.
Optionally, the at least one digital-to-analog conversion chip is further configured to: and receiving the corresponding wave control code table according to the address information in the wave control code table.
Specifically, the address information in the wave control code table is an array element coordinate, which can be represented by an array element row number and a column number in the wave control code table, and each wave control daughter board controls a corresponding array element. When the wave control code table is distributed to the wave control sub-boards, the wave control code table of the corresponding array element of each wave control sub-board can be sent according to the row number and the column number of the array element.
Optionally, the wave control daughter board 220 further includes at least one second field programmable gate array chip, each second field programmable gate array chip is connected to at least one digital-to-analog conversion chip, and the second field programmable gate array chip is configured to receive the wave control code table distributed by the wave control mother board according to address information in the wave control code table, and then distribute the wave control code table to at least one digital-to-analog conversion chip.
Fig. 9 is a structural diagram of a beam control system including an FPGA chip in a daughter board according to an embodiment of the present invention, and as shown in the figure, the system is a phased array antenna beam control system with 576 array elements, which can simultaneously form 2 beams, and the coverage area under the satellite has 512 numbered beam directions, and each beam can be rapidly switched among 512 beam directions. According to the system, a second FPGA chip is added in the wave control daughter board, the wave control mother board firstly sends the wave control code table to the second FPGA chip in the wave control daughter board, and then the second FPGA chip completes DAC control and DAC control code distribution. The wave control daughter board of the system has 9 second FPGA chips, the second FPGA chip of each wave control daughter board controls 64 array elements, namely, the 9 daughter boards FPGA control 2 wave beams of 576 array elements. Meanwhile, the system adopts 2 FLASH chips to be connected with a first FPGA chip of a wave control motherboard, each FLASH chip stores a wave control code table of a wave beam, and after the wave control system receives a wave beam switching instruction sent by a control center/upper computer module, the first FPGA chip calculates the initial address of each wave beam wave control code table, then reads the wave control code table of each wave beam in the FLASH in parallel and completes wave beam switching control at the same time.
Optionally, the chip characteristic table of the vector modulator is obtained by testing the vector modulator; the vector modulator characteristic table comprises two paths of orthogonal voltages and amplitudes and phases of corresponding array elements.
Specifically, the VM chip characteristic table is obtained by testing the VM chip; the VM chip characteristic table comprises two paths of I/Q voltages and amplitudes and phases of corresponding array elements.
Optionally, the characteristic table of each VM chip is related to itself, and the VM chip characteristic table may be tested at the time of factory shipment to obtain the VM chip characteristic table, so as to form an amplitude and phase change table for voltage control, thereby determining a corresponding relationship between the amplitude and the phase and the I/Q two-path voltage values generated by the DAC. Furthermore, the VM chip characteristic table can be interpolated according to system requirements, the control precision of amplitude and phase is improved, the precision of beam switching is further improved, theoretically, the precision can be infinitely improved through interpolation, and errors are reduced.
Optionally, the wave control board 220 further includes a power modulation chip to complete voltage modulation and control.
Optionally, the phased array antenna beam control system may include a radio frequency module, the radio frequency module is a module responsible for loading and transmitting radio frequency signals, after the wave control board 220 determines the target amplitude and the target phase of each array element included in the beam to be cut, the radio frequency module may send the target amplitude and the target phase to the phased array antenna, and the beam direction is related to the amplitude and the phase of the array element, so that the phased array antenna realizes beam switching by adjusting the amplitude and the phase of the array element.
Optionally, the phased array antenna beam switching control system further includes an upper computer module, and the upper computer module is used for testing the wave control motherboard and establishing a wave control code table; the wave control code table comprises wave beam central frequency points, wave beam pointing numbers, array element row numbers, array element column numbers and two-bit digital-to-analog conversion control codes.
Specifically, the antenna array surface is assumed to be two-dimensionally arranged at equal intervals on the rectangular boundary of a rectangular grid, and the sum of the wave positions theta and theta is designed to cover the ground
Figure BDA0003212831360000231
The angle changes the beam direction only by changing the phase of the array elements, and does not perform amplitude attenuation, and the phase shift value calculation formula of each array element is as described in the above embodiment.
And testing the wave control motherboard by the upper computer according to the phase shift value and the VM characteristic table obtained by the calculation, correspondingly searching the VM chip to obtain two paths of I/Q input voltages required by a certain phase shift value, converting the I/Q input voltages into DAC control codes required by the DAC chip according to the digital-to-analog conversion relation of the DAC chip, and correspondingly storing a beam central frequency point, a beam pointing number, an array element row number, an array element column number and the DAC control codes in a FLASH so as to determine a control instruction required for switching a certain beam to a set pointing direction.
The embodiment of the invention provides a phased array antenna beam control system, which comprises: the wave control motherboard and at least one wave control daughter board; the wave control mother board is connected with each wave control daughter board and used for receiving a switching control instruction, acquiring a target wave control code table corresponding to a to-be-switched wave beam with a directional switching requirement on the phased array antenna according to the received switching control instruction, and distributing the target wave control code table to at least one wave control daughter board; and the wave control sub-board is used for determining and adjusting the target amplitude and the target phase of each array element included in the wave beam to be cut through the target wave control code table after the target wave control code table is received, so that the phased array antenna realizes the wave beam pointing switching by adjusting the amplitude and the phase of each array element included in the wave beam to be cut. According to the phased array antenna beam control system provided by the embodiment of the invention, the field programmable logic gate array in the wave control motherboard completes resolving and table look-up of the control instruction, so that the wave control daughter board adjusts the amplitude and the phase of the array element according to the digital-to-analog conversion control code in the wave control code table, can simultaneously control a plurality of beams, is applied to beam control in different scenes, realizes rapid and accurate beam pointing switching, can also realize on-track reconstruction of the beam control system, and optimizes the performance of the phased array antenna.
The system can execute the methods provided by all the embodiments of the disclosure, and has corresponding functional modules and beneficial effects for executing the methods. For technical details that are not described in detail in this embodiment, reference may be made to the methods provided in all the foregoing embodiments of the disclosure.
Example four
Embodiments of the present invention provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processing apparatus, implements a phased array antenna beam control method as in embodiments of the present invention. The computer readable medium of the present invention described above may be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In contrast, in the present disclosure, a computer readable signal medium may comprise a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, optical cables, RF (radio frequency), etc., or any suitable combination of the foregoing.
In some embodiments, the clients, servers may communicate using any currently known or future developed network Protocol, such as HTTP (HyperText Transfer Protocol), and may interconnect with any form or medium of digital data communication (e.g., a communications network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), the Internet (e.g., the Internet), and peer-to-peer networks (e.g., ad hoc peer-to-peer networks), as well as any currently known or future developed network.
The computer readable medium may be embodied in the electronic device; or may exist separately without being assembled into the electronic device.
The computer readable medium carries one or more programs which, when executed by the electronic device, cause the electronic device to: the control center/upper computer module determines a target beam direction corresponding to a beam to be cut which has a direction switching requirement on the phased array antenna, generates a switching control instruction according to the target beam direction and sends the switching control instruction to a wave control mother board; the wave control mother board receives a switching control instruction, a target wave control code table corresponding to a to-be-switched wave beam which points to the switching requirement on the phased array antenna is searched from a pre-stored information table according to the received switching control instruction, and the target wave control code table is distributed to at least one wave control daughter board; after receiving the target wave control code table, the wave control sub-board determines and adjusts the target amplitude and the target phase of each array element included in the wave beam to be cut through the target wave control code table, so that the phased array antenna realizes the wave beam pointing switching by adjusting the amplitude and the phase of each array element included in the wave beam to be cut.
Computer program code for carrying out operations for the present disclosure may be written in any combination of one or more programming languages, including but not limited to an object oriented programming language such as Java, Smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units described in the embodiments of the present disclosure may be implemented by software or hardware. Where the name of an element does not in some cases constitute a limitation on the element itself.
The functions described herein above may be performed, at least in part, by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standard Products (ASSPs), systems on a chip (SOCs), Complex Programmable Logic Devices (CPLDs), and the like.
In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (17)

1. A phased array antenna beam steering method, comprising:
the wave control mother board receives a switching control instruction, searches a target wave control code table corresponding to a to-be-switched wave beam which points to the switching requirement on the phased array antenna from a pre-stored information table according to the received switching control instruction, and distributes the target wave control code table to at least one wave control daughter board;
after receiving the target wave control code table, the wave control sub-board determines and adjusts the target amplitude and the target phase of each array element included in the wave beam to be cut through the target wave control code table, so that the phased array antenna realizes the wave beam direction switching by adjusting the amplitude and the phase of each array element included in the wave beam to be cut.
2. The method according to claim 1, wherein the wave control motherboard receives a switching control instruction, searches a target wave control code table corresponding to a to-be-switched wave beam which is required by pointing to switching and exists on the phased array antenna from a pre-stored information table according to the received switching control instruction, and distributes the target wave control code table to at least one wave control daughter board, and the method comprises the following steps:
calculating the initial address of a wave control code table corresponding to the wave beam to be cut according to the switching control instruction;
and searching a target wave control code table corresponding to the wave beam to be cut from a pre-stored information table according to the starting address of the wave control code table, and distributing the target wave control code table to a corresponding wave control daughter board.
3. The method of claim 2, wherein the table of information is stored in a set number of memory chips; the information table comprises a wave control code table corresponding to each wave beam formed by the phased array antenna;
the influence factors of the set number of the memory chips comprise: the storage chip comprises the memory size, the number of wave beams, the total number of wave beam pointing numbers, the wave beam switching time index and the total number of array elements of the phased array antenna.
4. The method according to claim 2, wherein the calculating a start address of a wave control code table corresponding to the beam to be cut according to the switching control instruction comprises:
analyzing the switching control instruction to acquire a beam center frequency point and a beam pointing number contained in the switching control instruction;
acquiring the total number of beam pointing numbers of the phased array antenna, the total number of array elements of the phased array antenna, the number of storage bits of a digital-to-analog conversion control code and the initial position of the wave control code table stored in the at least one storage chip;
and calculating the initial address of the wave control code table corresponding to the wave beam to be cut according to the wave beam central frequency point and the wave beam direction number, the total number of the wave beam direction numbers of the phased array antenna, the total number of the array elements of the phased array antenna, the storage bit number of a digital-to-analog conversion control code and the initial position of the wave control code table stored in the at least one storage chip.
5. The method of claim 2, wherein distributing the target wave control code table to corresponding wave control daughter boards comprises:
and distributing the wave control code table to the corresponding wave control daughter board according to the address information in the wave control code table.
6. The method according to claim 1, wherein the determining and adjusting, by the wave control daughter board after receiving the target wave control code table, the target amplitude and the target phase of each array element included in the beam to be cut through the target wave control code table includes:
and extracting an amplitude-phase control code in the target wave control code table, and determining a phase shift value of the digital phase shifter and an attenuation value of the digital attenuator according to the amplitude-phase control code.
7. The method according to claim 1, wherein the wave control daughter board determines and adjusts a target amplitude and a target phase of each array element included in the beam to be cut through the target wave control code table after receiving the target wave control code table, further comprising:
extracting digital-to-analog conversion control codes in the wave control code table, and establishing two paths of orthogonal voltages according to the digital-to-analog conversion control codes;
and determining the target amplitude and the target phase of the corresponding array element of the phased array antenna according to the two paths of orthogonal voltages and a chip characteristic table of the vector modulator.
8. The method of claim 1, wherein before the wave-controlled motherboard receives the switching control command, the method further comprises:
testing the wave control mother board through an upper computer, and establishing the wave control code table; the wave control code table comprises the wave beam central frequency point, the wave beam pointing number, the array element row number, the array element column number and the amplitude and phase control code.
9. A phased array antenna beam steering system, comprising: the wave control motherboard and at least one wave control daughter board;
the wave control mother board is connected with each wave control daughter board and used for receiving a switching control instruction, acquiring a target wave control code table corresponding to a to-be-switched wave beam with a directional switching requirement on the phased array antenna according to the received switching control instruction, and distributing the target wave control code table to the at least one wave control daughter board;
and the at least one wave control daughter board is used for determining and adjusting the target amplitude and the target phase of each array element included in the to-be-cut wave beam through the target wave control code table after the target wave control code table is received, so that the phased array antenna realizes the wave beam pointing switching by adjusting the amplitude and the phase of each array element included in the to-be-cut wave beam.
10. The system of claim 9, wherein the wave control motherboard comprises a control center/upper computer interface, a first field programmable gate array chip, and a wave control daughter board interface;
the wave control motherboard receives a switching control instruction through the control center/upper computer interface;
the first field programmable gate array chip is used for calculating a target wave control code table corresponding to the wave beam to be cut according to the switching control instruction;
and the wave control mother board distributes the target wave control code table to the corresponding wave control daughter board through a wave control daughter board interface.
11. The system of claim 10, wherein the first field programmable gate array chip is specifically configured to:
analyzing the switching control instruction to acquire a beam center frequency point and a beam pointing number contained in the switching control instruction;
acquiring characteristic parameters of the phased array antenna, wherein the characteristic parameters comprise the total number of beam pointing numbers, the total number of array elements of the phased array antenna, the coordinates and the intervals of the array elements of the phased array antenna, the array arrangement mode of the phased array antenna and beam forming;
and calculating a target wave control code table corresponding to the wave beam to be cut according to the wave beam central frequency point, the wave beam pointing number and the characteristic parameters of the phased array antenna.
12. The system of claim 10, wherein the wave-controlled motherboard further comprises: a set number of memory chips;
the storage chip is used for pre-storing a wave control code table corresponding to each wave beam formed by the phased array antenna;
correspondingly, the first field programmable gate array chip is connected with each memory chip, calculates the starting address of the wave control code table corresponding to the wave beam to be cut according to the switching control instruction, and searches the target wave control code table from the memory chip according to the starting address of the wave control code table;
the influence factors of the set number of the memory chips comprise: the storage chip comprises the memory size, the number of wave beams, the total number of wave beam pointing numbers, the wave beam switching time index and the total number of array elements of the phased array antenna.
13. The system according to claim 9, wherein said at least one wave control daughter board comprises a wave control motherboard interface, at least one digital-to-analog conversion chip, and at least one vector modulator chip, each digital-to-analog conversion chip connected to at least one vector modulator chip;
the wave control code table distributed by the wave control mother board is received by the at least one wave control daughter board through the wave control mother board interface;
the at least one digital-to-analog conversion chip is used for extracting digital-to-analog conversion control codes in the wave control code table and establishing two paths of orthogonal voltages according to the digital-to-analog conversion control codes;
and the at least one vector modulator chip is used for determining the amplitude and the phase of the corresponding array element of the phased array antenna according to the two paths of orthogonal voltages combined with a characteristic table of the vector modulator chip.
14. The system of claim 13, wherein the at least one digital-to-analog conversion chip is further configured to:
and receiving the corresponding wave control code table according to the address information in the wave control code table.
15. The system according to claim 13, wherein the wave control daughter board further comprises at least one second field programmable gate array chip, each second field programmable gate array chip is connected to at least one digital-to-analog conversion chip, and the second field programmable gate array chip is configured to receive the wave control code table distributed by the wave control mother board according to the address information in the wave control code table, and then distribute the wave control code table to the at least one digital-to-analog conversion chip.
16. The system of claim 13, wherein the vector modulator chip characterization table is obtained by testing the vector modulator; the vector modulator characteristic table comprises the two paths of orthogonal voltages and the amplitude and the phase of the corresponding array elements.
17. A computer readable storage medium having stored thereon a computer program, characterized in that the program, when executed by a processing means, implements a phased array antenna beam steering method according to any of claims 1-8.
CN202110935350.7A 2021-08-16 2021-08-16 Phased array antenna beam control method, system and storage medium Pending CN113782971A (en)

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