CN115296045A - Sparse antenna array applied to low-orbit satellite internet broadband terminal - Google Patents

Sparse antenna array applied to low-orbit satellite internet broadband terminal Download PDF

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Publication number
CN115296045A
CN115296045A CN202211114782.2A CN202211114782A CN115296045A CN 115296045 A CN115296045 A CN 115296045A CN 202211114782 A CN202211114782 A CN 202211114782A CN 115296045 A CN115296045 A CN 115296045A
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array
sub
group
antenna
sparse
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Inventor
刘又嘉
许堂明
谭勇
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Chongqing Liangjiang Satellite Mobile Communication Co Ltd
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Chongqing Liangjiang Satellite Mobile Communication Co Ltd
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Priority to CN202211114782.2A priority Critical patent/CN115296045A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
    • 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
    • H01Q3/32—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 mechanical means
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

The application discloses be applied to sparse antenna array of low earth orbit satellite internet broadband terminal, including sparse array: the sparse array comprises a plurality of array units, and each array unit comprises a plurality of sub-array groups; the subarray group types comprise 1-drive-2 subarrays and 1-drive-1 subarrays; the array unit specifically comprises a first sub-array group, a second sub-array group and a third sub-array group: the first subarray group and the second subarray group both comprise two subarrays, and the third subarray group comprises one subarray. This application mainly leads to in low orbit is quiet, through adopting 1 to drive 2 forms to sparse array, and a passageway is shared to two antennas, under the condition that does not increase array size, reduces passageway quantity to reduce the cost, do not change the boundary condition of antenna array element simultaneously, can not increase the degree of difficulty of test calibration.

Description

Sparse antenna array applied to low-orbit satellite internet broadband terminal
Technical Field
The application relates to the field of satellite communication antennas, in particular to a sparse antenna array applied to a low-earth-orbit satellite internet broadband terminal.
Background
The sparse array antenna means that antenna units are staggered and sparsely distributed on the same antenna aperture, multiple tactical functions originally completed by different antennas are completed simultaneously by sharing one antenna aperture, a broadband terminal for low-orbit satellite communication in the prior art generally adopts a phased array antenna, the array form of the antenna generally adopts rectangular grid array or triangular grid array, one antenna is connected with one T/R channel, the number of the antennas of the rectangular grid and the triangular grid is a determined value under the determined aperture size, and the number of the channels is the same as that of the antennas. For sparse arrays, one antenna is connected to one T/R channel as well.
The number of antennas of the array under the same equivalent aperture can be reduced through algorithm optimization, so that the number of channels is reduced, but in order to make up for aperture efficiency loss caused by sparseness, the actual aperture size of the antenna is larger than the equivalent aperture size, and the prior art can show that the number of antennas and the number of channels are in one-to-one correspondence under the traditional rectangular grid and triangular grid arrangement, and the number of channels cannot be reduced. For the phased array, the cost is mainly concentrated on the TR component, and the low-orbit Wei Tongjing powered by the phased array adopting the mode is difficult to reduce the cost. The sparse array increases the array size, the algorithm is difficult to optimize and design, boundary conditions of all antennas are different, and the test calibration difficulty is increased.
Disclosure of Invention
The technical problem that this application will be solved is that the passageway quantity can't be reduced, or bring the array size when reducing the passageway quantity and increase, the design difficulty, the problem of calibration complicacy, aim at provides a sparse antenna array who is applied to low earth orbit satellite internet broadband terminal, through adopting 1 to drive 2 forms to the antenna array, a passageway is shared to two antennas, under the condition that does not increase the array size, reduce the passageway quantity, thereby reduce the cost, do not change the boundary condition of antenna array element simultaneously, can not increase the degree of difficulty of test calibration.
The application is realized by the following technical scheme:
a sparse antenna array applied to a low earth orbit satellite internet broadband terminal comprises a sparse array:
the sparse array comprises a plurality of array units, and each array unit comprises a plurality of sub-array groups;
the subarray group types comprise 1-drive-2 subarrays and 1-drive-1 subarrays;
the array unit specifically comprises a first sub-array group, a second sub-array group and a third sub-array group: the first subarray group and the second subarray group both comprise two subarrays, and the third subarray group comprises one subarray.
The method mainly aims at low-orbit static center-through, and the sparse array is arranged to comprise a plurality of array units, and each array unit comprises a plurality of sub-array groups; the subarray group types comprise 1-drive-2 subarrays and 1-drive-1 subarrays; through adopting the form of 1 driving 2 to sparse array, two antennas share a channel, and under the condition that the array size is not increased, the number of channels is reduced, thereby reducing the cost, simultaneously not changing the boundary condition of antenna array elements, and not increasing the difficulty of test calibration.
Further, the array unit specifically includes a first sub-array group, a second sub-array group, and a third sub-array group: the first subarray group and the second subarray group both comprise two subarrays, and the third subarray group comprises one subarray.
Furthermore, the first sub-array group and the second sub-array group are both 1-drive-2 sub-arrays, the third sub-array group is 1-drive-1 sub-array, and each array unit comprises three first sub-array groups, two second sub-array groups and two third sub-array groups.
Further, the array units are arranged in the following manner: the number of rows in the y direction is 3,x and the number of columns in the y direction is 4, forming an arrangement of 3*4.
Furthermore, each row of the array units comprises a first sub-array group, the first sub-array group of each row is staggered backwards by one unit interval in the y direction from the first column, and the one unit interval is the position occupied by one sub-array.
Further, a second sub-array group is arranged on the first column and the fourth column of each array unit in the x direction.
Further, the first row and the third row of each array unit in the x direction are provided with a third sub-array group:
the third sub-array group of the first row is arranged in the third column;
the third sub-array group of the third row is arranged in the second column.
Further, still include multilayer printed board and motor:
the sparse array is etched and pressed on the multilayer printed board;
the multilayer printed board is connected to the motor.
Further, the two sub-arrays of the first sub-array group and the two sub-arrays of the second sub-array group are connected through a 1-to-2 power divider/combiner;
the common ends of the two sub-arrays of the first sub-array group and the two sub-arrays of the second sub-array group are connected with the T/R component;
and the sub-arrays of the third sub-array group are connected with the T/R assembly through transmission lines.
Furthermore, the antenna array is printed on the multilayer printed board, an antenna housing is arranged on the other surface of the antenna array, which is connected with the multilayer printed board, the motor is structurally connected with the whole antenna, and the whole antenna structure controls the motor to mechanically rotate to change the direction of antenna beams. The scanning angle is increased by adopting an electromechanical scanning mode and deflecting an antenna by a motor in a mode similar to a fan shaking head mode. The antenna aperture can be effectively reduced, and the bottom cost is realized. In the scanning process, as the beam scanning angle of the antenna is increased, the gain of the antenna is reduced, the beam is widened, and when the array scale is determined, the gain of the antenna at the maximum angle needs to be ensured to meet the communication requirement. Through motor scanning, the electric scanning angle of the antenna can be reduced, the gain is lower, the required array scale is smaller, the aperture of the corresponding antenna is smaller, the antenna array is sparsely expanded into a whole array in a period, modularization can be achieved in the way, the array unit in the minimum period is used as a module, repeated expansion is achieved, the design difficulty can be reduced, and modularization of product design is achieved.
Compared with the prior art, the application has the following advantages and beneficial effects:
1. according to the antenna array, a 1-drive-2 mode is adopted, two antennas share one channel, the number of the channels is reduced under the condition that the size of the array is not increased, so that the cost is reduced, meanwhile, the boundary condition of an antenna array element is not changed, and the difficulty of test calibration is not increased;
2. the antenna adopts an electromechanical scanning mode, so that the aperture of the antenna can be effectively reduced, and the bottom cost is realized;
3. the array unit adopts a 1-drive-2 sub-array in the x direction, the array unit adopts a 1-drive-2 sub-array in the y direction and adopts a 1-drive-1 sub-array to form the array unit, a plurality of array units are expanded into a whole array, the sparsity of 58 percent of channels can be realized, the antenna azimuth phi = 0-360 degrees and the scanning of a vertical shaft angle theta = 0-40 degrees can be realized simultaneously, the phase control array electric scanning and the mechanical scanning are combined to realize the electromechanical hybrid scanning, the whole machine azimuth phi = 0-360 degrees and the scanning of the vertical shaft angle theta = 0-70 degrees are realized, and the array unit has the advantages of the scanning performance of the traditional 1-drive-2 array arrangement mode.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for a person skilled in the art, other related drawings can be obtained from these drawings without inventive effort. In the drawings:
FIG. 1 is a schematic diagram of an antenna array plane arrangement in an antenna array channel sparse manner for a low earth orbit satellite Internet broadband terminal according to the present invention;
FIG. 2 is a schematic diagram of a mode of sparse antenna array channels 1-2 applied to a low earth orbit satellite Internet broadband terminal according to the present invention;
fig. 3 is a schematic diagram of a connection mode of a motor and an antenna in an antenna array channel sparse mode applied to a low earth orbit satellite internet broadband terminal.
Reference numbers and corresponding part names in the drawings:
1. an antenna array; 10. an array unit; 11. a first sub-array group; 12. a second sub-array group; 13. a third sub-array group; 14. a T/R component; 15. 1-to-2 power divider/combiner; 2. a multilayer printed board; 3. a motor; 4. a radome.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to examples and drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present application and are not used as limitations of the present application.
It is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a number" means two or more unless specifically limited otherwise.
In the prior art, a broadband terminal for low earth orbit satellite communication generally adopts a phased array antenna, the array form of the antenna generally adopts rectangular grid array or triangular grid array, and one antenna is connected with one T/R channel.
The rectangular grid arrangement space needs to meet the following requirements:
Figure 434872DEST_PATH_IMAGE001
Figure DEST_PATH_IMAGE002
wherein the content of the first and second substances,
Figure 289695DEST_PATH_IMAGE003
、
Figure DEST_PATH_IMAGE004
in order to be able to scan the angle,
Figure DEST_PATH_IMAGE005
is the number of array elements on the azimuth plane,
Figure DEST_PATH_IMAGE006
is the number of array elements on the pitching surface.
The triangular grid arrangement interval needs to meet the following requirements:
Figure DEST_PATH_IMAGE007
wherein the content of the first and second substances,
Figure DEST_PATH_IMAGE008
，
Figure 161443DEST_PATH_IMAGE003
、
Figure 618969DEST_PATH_IMAGE004
in order to be able to scan the angle,
Figure 980812DEST_PATH_IMAGE005
is the number of array elements on the azimuth plane,
Figure 600012DEST_PATH_IMAGE006
is the number of array elements on the pitch surface.
Therefore, under the determined caliber size, the number of the antennas of the rectangular grid and the triangular grid is a determined value, and the number of the channels is the same as that of the antennas.
Example 1
As shown in fig. 1, the present embodiment provides a sparse antenna array applied to a low earth orbit satellite internet broadband terminal, including a sparse array 1:
the sparse array 1 comprises a plurality of array units 10, wherein each array unit 10 comprises a plurality of sub-array groups;
the subarray group types comprise 1-drive-2 subarrays and 1-drive-1 subarrays;
the array unit specifically includes a first sub-array group 11, a second sub-array group 12, and a third sub-array group 13: the first sub-array group 11 and the second sub-array group 12 each include two sub-arrays, and the third sub-array group 13 includes one sub-array.
The sparse array 1 comprises a plurality of array units 10, and each array unit 10 comprises a plurality of sub-array groups; the subarray group types include 1-drive-2 subarrays and 1-drive-1 subarrays. Mainly to low-orbit quiet well expert, through adopting 1 to drive 2's form to sparse array 1, two antennas sharing a passageway, under the condition that does not increase array size, reduce the passageway quantity to reduce the cost, do not change the boundary condition of antenna array element simultaneously, can not increase the degree of difficulty of test calibration.
As shown in fig. 2, a T/R channel connects two antenna elements, feeding them. In the prior art, the antenna subarray type is 1-drive-1, that is, one antenna array element is connected with one T/R channel, because in the conventional case, the array scale is the same as the number of channels, that is, the number of antenna array elements is the same as the number of channels, for example, in an m × n planar array, the number of channels in the planar array is m × n
The antenna subarray in this application adopts 1 to drive 2's mode, and 2 antennas share a passageway, arranges through reasonable antenna, can reduce the grating lobe influence, because the grating lobe has occupied radiant energy, makes antenna gain reduce. Objects seen from the grating lobe are easily confused with objects seen from the main lobe, resulting in blurred object positions. Interference signals entering the receiver from the grating lobes will affect the proper operation of the communication system. The pitch of the antenna elements should therefore be chosen appropriately to avoid grating lobes, in the limit, for an m × n planar array, the number of channels is (m × n)/2, so that the number of channels is relatively reduced without reducing the number of antennas.
In some possible embodiments, the array unit 10 comprises in particular a first sub-array group 11, a second sub-array group 12 and a third sub-array group 13: the first sub-array group 11 and the second sub-array group both comprise two sub-arrays, and the third sub-array group 13 comprises one sub-array.
In some possible embodiments, the first sub-array group 11 and the second sub-array group 12 are both 1-drive-2 sub-arrays, the third sub-array group 13 is a 1-drive-1 sub-array, and each array unit 10 includes three first sub-array groups 11, two second sub-array groups 12, and two third sub-array groups 13.
In some possible embodiments, the array unit 10 is arranged in the following manner: the number of rows in the y direction is 3,x and the number of columns in the y direction is 4, forming an arrangement of 3*4.
In some possible embodiments, each row of the array unit 10 includes a first sub-array group 11, and the first sub-array group 11 of each row is shifted backward in the y direction from the first column by a unit pitch, where one sub-array occupies.
In some possible embodiments, each array unit 10 is provided with one second sub-array group 12 in the first column and the fourth column in the x direction.
In some possible embodiments, the first and third rows of each array element 10 in the x-direction are each provided with a third sub-array group 13:
the third sub-array group 13 of the first row is arranged in the third column;
the third sub-array group 13 of the third row is arranged in the second column.
In some possible embodiments, the two sub-arrays of the first sub-array group 11 and the two sub-arrays of the second sub-array group 12 are connected by a 1-to-2 power divider/combiner 15;
the common ends of the two sub-arrays of the first sub-array group 11 and the two sub-arrays of the second sub-array group 12 are both connected with a T/R component 14;
the sub-arrays of the third sub-array group 13 are connected to the T/R elements 14 by transmission lines.
In some possible embodiments, in the array unit 10, the common end of the first sub-array group 11 in the first row in the y direction is connected to the T/R assembly 14 toward the second row, the common end of the first sub-array group 11 in the second row in the y direction is connected to the T/R assembly 14 toward the first column, and the common end of the first sub-array group 11 in the third row in the y direction is connected to the T/R assembly 14 toward the second row;
the common end of the second sub-array group 12 in the first column in the x direction in the array unit 10 is connected to the T/R assembly 14 toward the second column, and the common end of the second sub-array group 12 in the fourth column in the x direction is connected to the T/R assembly 14 toward the third column;
the third sub-array group 13 of the first row in the y direction of the array unit 10 is connected to the T/R elements 14 toward the second column, and the third sub-array group 13 of the first row in the y direction is connected to the T/R elements 14 toward the second column.
As shown in fig. 3, the present invention further includes a multilayer printed board 2 and a motor 3: the sparse array 1 is etched and pressed on the multilayer printed board 2; the multilayer printed board 2 is connected on the motor 3, and the other side of the sparse array 1 connected with the multilayer printed board 2 is provided with an antenna housing 4.
In some possible embodiments, the motor 3 is connected to an antenna structure, which controls the motor 3 to mechanically rotate to change the direction of the antenna beam. By adopting an electromechanical scanning mode, the aperture of the antenna can be effectively reduced, and the cost of the bottom layer is realized.
The key point of the technology is that the array unit 10 adopts a 1-drive-2 sub array in the x direction, the array unit 10 adopts a 1-drive-2 sub array in the y direction and a 1-drive-1 sub array to form the array unit 10, and the array units 10 are expanded into a whole array, so that the sparsity of 58 percent of channels can be realized, and the channel cost can be effectively reduced.
Meanwhile, the scanning of the antenna azimuth phi = 0-360 degrees and the vertical shaft angle theta = 0-40 degrees can be realized, the electromechanical hybrid scanning is realized by combining the phase control array electrical scanning and the mechanical scanning, the scanning of the whole machine azimuth phi = 0-360 degrees and the vertical shaft angle theta = 0-70 degrees is realized, and the scanning device has the advantage of the scanning performance of the traditional 1-drive 2-array mode. The array x direction one-drive-2 sub-array, the array y direction one-drive-2 sub-array and the array 1-drive-1 sub-array form a periodic unit.
The array x direction one-drive-2 sub-array, the array y direction one-drive-2 sub-array and the array 1-drive-1 sub-array are adopted to form a periodic unit, and the specific arrangement mode is the mode shown in fig. 1. Under the arrangement mode, the antenna directional diagram calculated theoretically can realize the scanning of the azimuth phi =0 to 360 degrees and the vertical shaft angle theta =0 to 40 degrees; then on this basis the antenna is deflected using the motor 3, increasing the scanning angle in a similar way as a fan swings its head.
In the scanning process, as the beam scanning angle of the antenna increases, the gain of the antenna decreases and the beam widens, and when the array scale is determined, it is required to ensure that the gain of the antenna at the maximum angle meets the communication requirement. Through the scanning of the motor 3, the electric scanning angle of the antenna can be reduced, the gain is lower, the required array scale is smaller, the aperture of the corresponding antenna is smaller, the sparse array 1 is periodically and sparsely expanded into a whole array, the modularization can be realized, the array unit 10 with the minimum period is used as a module, the repeated expansion is realized, the design difficulty can be reduced, and the modularization of product design is realized.
The above-mentioned embodiments, objects, technical solutions and advantages of the present application are described in further detail, it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.

Claims (10)

1. A sparse antenna array applied to a low earth orbit satellite Internet broadband terminal is characterized by comprising a sparse array (1):
the sparse array (1) comprises a plurality of array units (10), and the array units (10) comprise a plurality of sub-array groups;
the subarray group types comprise 1-drive-2 subarrays and 1-drive-1 subarrays;
the array unit (10) specifically comprises a first sub-array group (11), a second sub-array group (12) and a third sub-array group (13): the first sub-array group (11) and the second sub-array group both comprise two sub-arrays, and the third sub-array group (13) comprises one sub-array.
2. The sparse antenna array applied to the low earth orbit satellite internet broadband terminal of claim 1, wherein the first sub-array group (11) and the second sub-array group (12) are both 1-drive-2 sub-arrays, the third sub-array group (13) is a 1-drive-1 sub-array, and each array unit (10) comprises three first sub-array groups (11), two second sub-array groups (12) and two third sub-array groups (13).
3. The sparse antenna array applied to the low earth orbit satellite internet broadband terminal of claim 1, wherein the array unit (10) is arranged in a way that: the number of rows in the y direction is 3,x and the number of columns in the y direction is 4, forming a 3 × 4 periodic arrangement.
4. The sparse antenna array applied to the low earth orbit satellite internet broadband terminal of claim 1, wherein each row of the array unit (10) comprises a first sub-array group (11), the first sub-array group (11) of each row is shifted backward in the y direction from the first column by a unit spacing, and the unit spacing is a position occupied by one sub-array.
5. The sparse antenna array applied to the low earth orbit satellite internet broadband terminal of claim 1, wherein each array unit (10) is provided with a second sub-array group (12) in a first column and a fourth column in the x direction.
6. The sparse antenna array applied to the low earth satellite internet broadband terminal of claim 1, wherein each array unit (10) is provided with a third sub-array group (13) in the first row and the third row in the x direction:
the third sub-array group (13) of the first row is arranged in the third column;
a third sub-array group (13) of the third row is arranged in the second column.
7. The sparse antenna array applied to the low earth orbit satellite internet broadband terminal of claim 1, wherein the two sub-arrays of the first sub-array group (11) and the two sub-arrays of the second sub-array group (12) are connected through a 1-to-2 power divider/combiner (15);
the common ends of the two sub-arrays of the first sub-array group (11) and the two sub-arrays of the second sub-array group (12) are connected with a T/R component (14);
and the sub-arrays of the third sub-array group (13) are connected with the T/R assembly (14) through transmission lines.
8. The sparse antenna array applied to the low earth orbit satellite internet broadband terminal of claim 1, further comprising a multilayer printed board (2) and a motor (3):
the sparse array (1) is etched and pressed on the multilayer printed board (2);
the multilayer printed board (2) is connected to the motor (3).
9. The sparse antenna array applied to the low earth orbit satellite internet broadband terminal as claimed in claim 8, wherein the other side of the sparse array (1) connected with the multilayer printed board (2) is provided with an antenna cover (4).
10. The sparse antenna array applied to the low earth orbit satellite internet broadband terminal of claim 9, wherein the motor (3) is connected with an antenna complete machine structure, and the antenna complete machine structure controls the motor (3) to mechanically rotate to change the direction of an antenna beam.
CN202211114782.2A 2022-09-14 2022-09-14 Sparse antenna array applied to low-orbit satellite internet broadband terminal Pending CN115296045A (en)

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