Wide-distance planar phased-array antenna grating lobe suppression method and system

Abstract

The invention provides a wide-distance planar phased-array antenna grating lobe suppression method and system, grating lobes are suppressed through subarray symmetrical dislocation, the method comprises the following steps: an antenna array surface is divided into unit block column subarrays which are symmetrically arranged and have an even number of more than 6 columns, and azimuth difference beams and pitch difference beams of the antenna array surface are symmetrically distributed; the unit block column sub-arrays are arranged from left to right in the x direction, the unit block column sub-arrays in the second column from left, the unit block column sub-arrays in the second column from right and the other unit block column sub-arrays are staggered by a set distance, and the first grating lobe is split into two in the azimuth direction. The pitch direction active channel spacing is 2.67 lambda0, and the grating lobe suppression effect is improved; the pitching spacing is properly compressed, and the scanning area is enlarged under the same grating lobe suppression condition; the aperture efficiency is fully utilized, the aperture utilization rate is improved, and the number of active channels and the array plane cost and weight are reduced; the antenna unit blocks are arranged in a matrix array mode and are easy to integrate, and the sub-array dislocation structure and the array surface structure layout are easy to achieve in engineering.

Description

Technical Field

[0001] The present invention relates to the technical field of radar detection, and more specifically, to a method and system for suppressing grating lobes of a wide-spacing planar phased array antenna. Background Art

[0002] The phased array antenna of an active phased array radar usually accounts for 60% - 70% of the radar hardware cost, and the T / R components account for more than 70% of the phased array antenna cost. Therefore, under the condition of ensuring that the radiation performance of the antenna meets the requirements, minimizing the number of array elements and reducing the hardware cost are of great significance in engineering applications. Increasing the spacing between the array elements of the active phased array antenna is an effective way to reduce the number of array elements and the cost.

[0003] However, in the antenna array element large-spacing periodic arrangement scheme designed by conventional methods, grating lobes are bound to appear, which affects the detection performance. Therefore, it is necessary to suppress the grating lobes. Currently, the main methods for suppressing grating lobes include: (1) Using the array high-efficiency element pattern to suppress grating lobes; (2) Using non-periodic array arrangement to suppress grating lobes; (3) Using the method of optimizing the element pattern: suppressing the grating lobes and the resulting secondary grating lobes by optimizing the amplitude distribution of the subarray; (4) Through spatial filter technology: using a spatial filter at the grating lobe position to suppress the power transmission of electromagnetic waves; (5) Using the method of random element distribution: the radiating array elements have unequal apertures and are randomly arranged, forming a non-periodic unit-level arrangement.

[0004] However, the above existing methods for suppressing grating lobes have the following disadvantages: The methods of suppressing grating lobes by using the array high-efficiency element pattern and non-periodic array arrangement are mainly applicable to circularly polarized antennas. The rotation of the subarray does not affect the synthesis of the main beam of the array surface, and the grating lobes do not synthesize during spatial displacement. However, they are not applicable to linearly polarized antennas and cannot meet the requirements of high gain; The method of optimizing the element pattern is mainly to make the element pattern have stronger directivity. The main means include methods such as element aperture multiplexing. However, the method of optimizing the element pattern will reduce the element efficiency and the array surface gain; The method of random element distribution will destroy the unit periodicity, affecting the performance consistency and stability of the unit itself; The spatial filter technology is mainly realized through the antenna radome filtering technology, which increases the design and processing cost of the antenna radome and is not conducive to the realization of high-power radiation wave transmission. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to propose a method and system for suppressing grating lobes of a wide-spacing planar phased array antenna, which is applied to a linearly polarized planar phased array antenna array. By symmetrically misaligning sub-arrays to suppress grating lobes, a high-gain design with a small number of antenna arrays is achieved, the number of active channels is reduced, and the weight and cost of the array surface are reduced, so as to be applicable to radars with high requirements for antenna weight limitation (such as gun position detection and calibration radars); wide-angle scanning is adopted in the azimuth plane, and small-angle scanning is adopted in the elevation plane. The azimuth spacing of the antenna block units in the azimuth direction and the elevation spacing of the antenna block units in the elevation direction are optimized to improve the beam performance of the entire antenna array surface.

[0006] The present invention provides a method for suppressing grating lobes of a wide-spacing planar phased array antenna. By symmetrically misaligning sub-arrays to suppress grating lobes, it includes: dividing the antenna array surface into unit block column sub-arrays with an even number of columns of 6 or more (preferably 6 columns) arranged symmetrically, and the azimuth difference beam and elevation difference beam of the antenna array surface are both symmetrically distributed; The unit block column sub-arrays are arranged from left to right along the x (horizontal) direction. Among them, the unit block column sub-arrays in the second column from the left and the second column from the right are misaligned by a set spacing from the remaining unit block column sub-arrays, splitting the first grating lobe into two in the azimuth direction.

[0007] Partial columns between sub-arrays are arranged in a misaligned manner, splitting the first grating lobe (near both sides of the main beam in the elevation direction) into two in the azimuth direction, effectively suppressing the generation of grating lobes, improving the directivity and gain of the antenna. Moreover, optimizing the arrangement of sub-arrays can make the antenna have better radiation characteristics in multiple directions, improving the overall performance. In one embodiment of the present invention, the first grating lobe of the array factor is reduced by 6 dB compared with the conventional rectangular arrangement.

[0008] After the sub-arrays of the present invention are misaligned, the antenna array surface still adopts a symmetric arrangement, and the entire antenna array surface still maintains a strict symmetric relationship in the azimuth plane and elevation plane. Therefore, the azimuth difference beam and elevation difference beam are still symmetrically distributed, and the null depth index still meets below -30 dB, meeting the high detection accuracy requirements of the system.

[0009] In addition, the symmetric design of the antenna array surface also has the following advantages: Reducing interference: The symmetric antenna radiates horizontally polarized waves, while most interferences are vertically polarized waves. Therefore, the influence of interference on reception can be reduced. This characteristic makes the symmetric antenna perform excellently in a complex electromagnetic environment.

[0010] Good directivity control: The directivity characteristics of the antenna make the symmetric antenna have advantages in specific applications. For example, the length of the antenna mainly affects the horizontal plane pattern, and the height of the antenna mainly affects the vertical plane pattern. This separated influence makes the symmetric antenna design more flexible and can be adjusted according to specific requirements.

[0011] Balanced characteristics: Symmetrical antennas are usually balanced, which makes them more stable when connected to unbalanced coaxial cables and reduces signal loss.

[0012] Resonant frequency stability: The resonant frequency of symmetrical antennas is relatively stable, enabling better performance at specific frequencies, which is particularly important for systems that require precise frequency control.

[0013] Convenient erection and feeding: The symmetrical design of the antenna makes the erection and feeding processes relatively simple, reducing the difficulty of installation and maintenance.

[0014] Furthermore, each of the unit block sub-arrays is divided into multiple antenna modules arranged in a straight line along the y-direction. Each of the antenna modules includes multiple azimuthal and multiple elevation antenna unit blocks arranged in the same matrix array; the spacing between the unit block sub-array in the second column from the left, the unit block sub-array in the second column from the right and the remaining unit block sub-arrays is 2×dy, where dy is the spacing of the antenna unit blocks along the y-direction.

[0015] Preferably, the number of azimuthal antenna unit blocks is twice the number of elevation antenna unit blocks. In practical applications, each antenna module can be composed of 8 azimuthal antenna unit blocks × 4 elevation antenna unit blocks = 32 antenna unit blocks.

[0016] Since the maximum value of the array pattern appears when the in-array phase difference between the unit block sub-arrays of the phased array antenna is equal to the spatial phase difference, the sub-array has a certain influence on the beamforming performance of the entire antenna array surface, and the division of the sub-array may cause the generation of grating lobes. Moreover, the antenna array surface realizes the array factor scanning by controlling the phases of each sub-array in the array, thereby realizing the antenna beam scanning. Since the sub-array spacing is much larger than one free space wavelength, there are many periodic grating lobes of the array factor in the visible space.

[0017] For suppressing grating lobes in sub-array level phased array antennas, essentially it is to suppress the first grating lobe level in the array factor. In the present invention, by designing the misalignment size of the sub-arrays, the y-direction misalignment of two unit block sub-arrays is 2×dy, and the grating lobe suppression effect is quite good.

[0018] Furthermore, the azimuthal spacing d of the azimuthal antenna unit blocks is set to be calculated according to the following formula: ; where θ is the electrical scanning range to achieve wide-angle scanning in the azimuth plane, and the electrical scanning angle is greater than 45°; λ is the wavelength.

[0019] The azimuthal spacing of the azimuthal antenna unit blocks has an important influence on the performance of the phased array antenna, mainly including the following aspects: ‌Beam scanning ability‌: The azimuth spacing determines the scanning range and accuracy of the antenna beam in the azimuth plane. An appropriate spacing can ensure that the antenna can scan flexibly within the required angular range without interference or blind spots. ‌Pattern characteristics‌: The azimuth spacing also affects the pattern characteristics of the antenna, including the main lobe width, sidelobe level, etc. A reasonable spacing design can optimize the radiation pattern of the antenna, improving directivity and gain. ‌Spatial phase difference‌: The spatial phase difference between adjacent antenna elements is determined by the azimuth spacing and the signal propagation distance. This phase difference affects the formation and pointing of the beam. Therefore, a reasonable design of the azimuth spacing is crucial for achieving precise beam control.

[0020] The present invention improves the beam directivity and azimuth pattern characteristics of the phased array antenna by optimizing the design of the azimuth spacing of the antenna element blocks in the azimuth direction.

[0021] In one embodiment of the present invention, there are 8 antenna element blocks in the azimuth direction, the azimuth spacing of the antenna element blocks is 47 mm, and the 8 antenna element blocks correspond to an 8-channel digital component.

[0022] Further, the elevation spacing of the antenna element blocks in the elevation direction is set to 2.67λ 0 , λ 0 is the center operating wavelength.

[0023] ‌In a phased array antenna, the influence of the elevation spacing of the antenna element blocks in the elevation direction on the performance of the phased array antenna mainly includes the following aspects: ‌Beam width‌: The elevation spacing affects the beam width. The larger the elevation spacing, the narrower the beam width; the smaller the elevation spacing, the wider the beam width. ‌Sidelobe level‌: An appropriate elevation spacing can reduce the sidelobe level and improve the directivity of the antenna. If the spacing is too large or too small, it may lead to an increase in the sidelobe level, affecting the performance of the antenna. ‌Grating lobe problem‌: The selection of the elevation spacing also needs to avoid the generation of grating lobes. Grating lobes are additional radiation peaks that appear at specific angles in a phased array antenna and affect the directivity of the main beam. An appropriate spacing can reduce the influence of grating lobes.

[0024] The present invention optimizes the design of the elevation spacing of the antenna element blocks in the elevation direction, reasonably adjusts the beam width, and reduces the sidelobe and grating lobe levels.

[0025] In one embodiment of the present invention, there are 4 antenna element blocks in the elevation direction, and the elevation spacing of the antenna element blocks is 61.5 mm.

[0026] Further, the multiple antenna element blocks in the elevation direction of each antenna module are synthesized by an equally divided passive power divider, and the multiple antenna element blocks in the elevation direction correspond to one TR module (transceiver module).

[0027] This method can greatly reduce the number of active channels and the cost of the TR module. At the same time, from the perspective of engineering implementation, measures such as using multiple antenna element blocks corresponding to one TR module greatly reduce the engineering implementation complexity and improve the installation rate of the phased array antenna system.

[0028] Further, the method for suppressing grating lobes of the wide-spacing planar phased array antenna further includes: suppressing the grating lobes appearing in the far zone to a low level through the element lobes of the antenna element blocks in the element block sub-array. When the main beam of the radiation beam is parallel to the normal direction and the array element spacing is less than the free space wavelength, grating lobes can be suppressed. For the grating lobes appearing in the far zone in the present invention, by optimizing the structural layout of the antenna element blocks in the element block sub-array, the grating lobe energy is dispersed, thereby effectively suppressing the generation of far zone grating lobes.

[0029] The present invention also provides a system for suppressing grating lobes of a wide-spacing planar phased array antenna, which executes the method for suppressing grating lobes of a wide-spacing planar phased array antenna as described above, and includes: Sub-array symmetry module: used to divide the antenna array surface into even-numbered element block sub-arrays of 6 columns or more arranged symmetrically, and the azimuth difference beam and elevation difference beam of the antenna array surface are both symmetrically distributed; Sub-array dislocation module: used to arrange the element block sub-arrays in the x direction from left to right, wherein the element block sub-array in the second column from the left and the element block sub-array in the second column from the right are staggered from the other element block sub-arrays by a set distance, splitting the first grating lobe into two in the azimuth direction.

[0030] Further, the sub-array dislocation module includes: Sub-array dislocation distance setting unit: used to divide each element block sub-array into multiple antenna modules arranged in a straight line in the y direction, and each antenna module includes multiple azimuth and multiple elevation antenna element blocks arranged in the same matrix array; the distance by which the element block sub-array in the second column from the left and the element block sub-array in the second column from the right are staggered from the other element block sub-arrays is 2×dy, where dy is the distance of the antenna element block in the y direction.

[0031] Preferably, a monitoring network is integrally designed inside the antenna element block to achieve channel-level monitoring.

[0032] Preferably, each radio frequency network wiring is simultaneously realized by a single-layer strip line in the antenna element block, with a large wiring density, short radio frequency traces, and low loss; Preferably, both the antenna unit block and the external connection port have blind mating functions, which is beneficial for disassembly and installation.

[0033] The present invention also provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the method for suppressing grating lobes of a wide-spacing planar phased array antenna as described above is implemented.

[0034] The present invention also provides a computer device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the method for suppressing grating lobes of a wide-spacing planar phased array antenna as described above is implemented.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows: The method and system for suppressing grating lobes of a wide-spacing planar phased array antenna provided by the present invention design the pitch active channel spacing to reach 2.67λ 0 , the grating lobe level is only related to the pitch angle and basically does not deteriorate with azimuth scanning; it remains at a low level within the required scanning area, effectively improving the grating lobe suppression effect; by appropriately compressing the pitch spacing, the scanning area becomes larger under the same grating lobe suppression conditions; the setting of the pitch active channel spacing (2.67λ 0 ) makes full use of the aperture efficiency, improves the aperture utilization rate, and reduces the number of active channels. The number of active channels is reduced to 35.7% of the existing conventional design, thereby greatly reducing the cost and weight of the array surface; the antenna unit blocks are arranged in a matrix array, which is easy to integrate. The antenna unit blocks adopt a low-profile design, the processing technology is simple, the misalignment structure between the unit block column sub-arrays and the array surface structure layout are easy to implement in engineering, suitable for a variety of usage scenarios, and beneficial for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention.

[0037] In the drawings: FIG. 1 is an arrangement diagram of the antenna array surface of an embodiment of the present invention; FIG. 2 is the internal circuit diagram of the antenna unit block of an embodiment of the present invention; FIG. 3 is the antenna array surface and the beam normal lobe pattern of an embodiment of the present invention; FIG. 4 is the antenna array surface and the beam pitch scanning lobe pattern of an embodiment of the present invention; FIG. 5 is the antenna array surface and the beam oblique scanning lobe pattern of an embodiment of the present invention; FIG. 6 is the antenna array surface azimuth difference beam normal lobe pattern of an embodiment of the present invention; FIG. 7 is the elevation scanning lobe pattern of the azimuth difference beam of the antenna array surface according to the embodiment of the present invention; FIG. 8 is the oblique scanning lobe pattern of the azimuth difference beam of the antenna array surface according to the embodiment of the present invention; FIG. 9 is the normal lobe pattern of the elevation difference beam of the antenna array surface according to the embodiment of the present invention; FIG. 10 is the elevation scanning lobe pattern of the elevation difference beam of the antenna array surface according to the embodiment of the present invention; FIG. 11 is the oblique scanning lobe pattern of the elevation difference beam of the antenna array surface according to the embodiment of the present invention; Figure 12 is the schematic diagram of the composition of the computer device according to the embodiment of the present invention. Detailed implementation manners

[0038] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are merely examples of devices and products consistent with some aspects of the present disclosure as detailed in the appended claims.

[0039] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms "a", "the" and "said" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0040] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0041] The following further describes the embodiments of the present invention in detail with reference to the drawings.

[0042] The embodiment of the present invention provides a method for suppressing grating lobes of a wide-spacing planar phased array antenna, which suppresses grating lobes by symmetric misalignment of sub-arrays, including: dividing the antenna array surface into 6 column unit block sub-arrays arranged symmetrically, and the azimuth difference beam and elevation difference beam of the antenna array surface are both symmetrically distributed (as Figures 6 - 11 shown); Arrange the unit block column sub-arrays in the x (horizontal) direction from left to right. Among them, the unit block column sub-array in the second column from the left and the unit block column sub-array in the second column from the right are staggered from the remaining unit block column sub-arrays by a set distance, splitting the first grating lobe into two in the azimuth direction. Some columns between the sub-arrays are arranged in a staggered manner, splitting the first grating lobe into two in the azimuth direction, effectively suppressing the generation of grating lobes and improving the directivity and gain of the antenna. And optimizing the arrangement of the sub-arrays can make the antenna have better radiation characteristics in multiple directions and improve the overall performance. In this embodiment, the first grating lobe of the array factor is reduced by 6 dB compared with the conventional rectangular arrangement (as Figures 3 - 11 shown). After designing the sub-array staggering, the antenna array surface still adopts a symmetric arrangement, and the entire antenna array surface still maintains a strictly symmetric relationship in the azimuth plane and elevation plane (as Figure 1 shown), the azimuth difference and elevation difference beams are still symmetrically distributed, and the null depth index meets below -30 dB (as Figures 3 - 5 shown), which can meet the high detection accuracy requirements of the system.

[0043] Divide each unit block column sub-array into multiple antenna modules arranged in a line along the y direction. Each antenna module includes multiple azimuth and multiple elevation antenna unit blocks arranged in the same matrix array; the distance by which the unit block column sub-array in the second column from the left and the unit block column sub-array in the second column from the right are staggered from the remaining unit block column sub-arrays is 2×dy, where dy is the distance between the antenna unit blocks along the y direction (as Figure 1 shown). In this embodiment, each antenna module is composed of 8 antenna unit blocks in the azimuth direction × 4 antenna unit blocks in the elevation direction = 32 antenna unit blocks. Since when the in-array phase difference between the unit block column sub-arrays of the phased array antenna is equal to the space phase difference, the array pattern shows a maximum value, the sub-arrays will have a certain impact on the beamforming performance of the entire antenna array surface, and the division of the sub-arrays may lead to the generation of grating lobes. Also, the antenna array surface realizes the scanning of the array factor by controlling the phases of each sub-array in the array, thereby realizing the scanning of the antenna beam. Since the sub-array spacing is much larger than a free space wavelength, there are many periodic grating lobes of the array factor in the visible space. By designing the sub-array staggering size, staggering the two unit block column sub-arrays by 2×dy in the y direction, the grating lobe suppression effect is quite good (as Figures 3 - 11 shown).

[0044] Set the azimuth spacing d of the azimuth antenna unit blocks to be calculated according to the following formula: ; where θ is the electrical scanning range, realizing wide-angle scanning in the azimuth plane, and the electrical scanning angle is greater than 45°; λ is the wavelength.

[0045] In this embodiment, there are 8 antenna unit blocks in the azimuth direction, the azimuth spacing of the antenna unit blocks is 47 mm, and the 8 antenna unit blocks correspond to 8-channel digital components. By optimizing the azimuth spacing design of the antenna unit blocks in the azimuth direction, the beam directivity and azimuth pattern characteristics of the phased array antenna are improved (such as Figures 3 - 11 shown).

[0046] The elevation spacing of the antenna unit blocks in the elevation direction is set to 2.67λ 0 , where λ 0 is the center operating wavelength. In this embodiment, there are 4 antenna unit blocks in the elevation direction, and the elevation spacing of the antenna unit blocks is 61.5 mm. By optimizing the elevation spacing design of the antenna unit blocks in the elevation direction, the beam width is reasonably adjusted, and the sidelobe and grating lobe levels are reduced (such as Figures 3 - 11 shown). The multiple antenna unit blocks in the elevation direction of each antenna module are synthesized by an equal-division passive power divider. The multiple antenna unit blocks in the elevation direction correspond to one TR component, which can greatly reduce the number of active channels and the cost of the TR component. At the same time, measures such as using multiple antenna unit blocks corresponding to one TR component greatly reduce the engineering implementation complexity, improve the installation rate of the phased array antenna system, and facilitate the engineering implementation of this antenna design.

[0047] For the grating lobes that appear in the far zone, by optimizing the structural arrangement of the antenna unit blocks in the unit block column subarray, the unit lobes of the antenna unit blocks in the unit block column subarray are suppressed to a low level, and the grating lobe energy is dispersed, effectively suppressing the generation of far-zone grating lobes.

[0048] The embodiment of the present invention also provides a grating lobe suppression system for a wide-spacing planar phased array antenna, which executes the grating lobe suppression method for a wide-spacing planar phased array antenna as described above, including: Subarray symmetry module: used to divide the antenna array surface into unit block column subarrays with an even number of columns of 6 or more arranged symmetrically, and the azimuth difference beam and elevation difference beam of the antenna array surface are both symmetrically distributed; Subarray dislocation module: used to arrange the unit block column subarrays in the x direction from left to right, where the unit block column subarray in the second column from the left and the unit block column subarray in the second column from the right are staggered by a set distance from the remaining unit block column subarrays, splitting the first grating lobe into two in the azimuth direction.

[0049] The subarray dislocation module includes: Sub-array misalignment spacing setting unit: used to divide each of the unit block column sub-arrays into multiple antenna modules arranged in a straight line along the y direction. Each of the antenna modules includes multiple azimuth and multiple elevation antenna unit blocks arranged in the same matrix array; the spacing between the unit block column sub-array of the second column from the left, the unit block column sub-array of the second column from the right and the remaining unit block column sub-arrays is 2×dy, where dy is the spacing of the antenna unit blocks along the y direction.

[0050] The monitoring network is integrated inside the antenna unit block (as Figure 2 shown), realizing channel-level monitoring.

[0051] The antenna unit block realizes the routing of each RF network through a single-layer strip line, with a large routing density, short RF traces, and low loss; Both the antenna unit block and the external connection port have blind plug functions, which are beneficial for disassembly and installation.

[0052] In this embodiment, the method and system for suppressing grating lobes of a wide-spacing planar phased array antenna design the elevation active channel spacing to reach 2.67λ 0 , and the grating lobe level is only related to the elevation angle and basically does not deteriorate with azimuth scanning; it remains at a low level within the required scanning area, effectively improving the grating lobe suppression effect; by appropriately compressing the elevation spacing, the scanning area becomes larger under the same grating lobe suppression conditions; the setting of the elevation active channel spacing (2.67λ 0 ) makes full use of the aperture efficiency, improves the aperture utilization rate, and reduces the number of active channels to 35.7% of the existing conventional design, significantly reducing the cost and weight of the array surface; the antenna unit blocks are arranged in a matrix array, which is easy to integrate. The antenna unit blocks adopt a low-profile design, with a simple processing technology, and the misalignment structure between the unit block column sub-arrays and the array surface structure layout are easy to implement in engineering.

[0053] This embodiment of the present invention also provides a computer device, Figure 12 which is a schematic structural diagram of a computer device provided by this embodiment of the present invention; as shown in the attached drawing Figure 12 shown, the computer device includes: an input device 23, an output device 24, a memory 22, and a processor 21; the memory 22 is used to store one or more programs; when the one or more programs are executed by the one or more processors 21, the one or more processors 21 implement the method for suppressing grating lobes of a wide-spacing planar phased array antenna as provided in the above embodiment; where the input device 23, the output device 24, the memory 22, and the processor 21 can be connected through a bus or other means, Figure 12 and here, the connection through the bus is taken as an example.

[0054] The memory 22, as a computable device-readable and writable storage medium, can be used to store software programs and computer-executable programs, such as the program instructions corresponding to the method for suppressing grating lobes of a wide-spacing planar phased array antenna as described in the embodiments of the present invention. The memory 22 mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function. The data storage area can store data created according to the use of the device, etc. In addition, the memory 22 can include high-speed random access memory and can also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some instances, the memory 22 can further include a memory remotely disposed relative to the processor 21, and these remote memories can be connected to the device through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0055] The input device 23 can be used to receive input digital or character information and generate key signal inputs related to the user settings and function control of the device. The output device 24 can include a display device such as a display screen.

[0056] The processor 21 executes various functional applications and data processing of the device by running the software programs, instructions, and modules stored in the memory 22, that is, implements the above method for suppressing grating lobes of a wide-spacing planar phased array antenna.

[0057] The above-provided computer device can be used to execute the method for suppressing grating lobes of a wide-spacing planar phased array antenna provided in the above embodiments, and has corresponding functions and beneficial effects.

[0058] An embodiment of the present invention further provides a storage medium containing computer-executable instructions. When the computer-executable instructions are executed by a computer processor, they are used to execute the method for suppressing grating lobes of a wide-spacing planar phased array antenna provided in the above embodiment. The storage medium is any of various types of memory devices or storage devices, including: installation media such as CD-ROMs, floppy disks or tape devices; computer system memories or random access memories such as DRAM, DDRRAM, SRAM, EDORAM, Rambus RAM, etc.; non-volatile memories such as flash memories, magnetic media (such as hard disks or optical storage); registers or other similar types of memory components, etc.; the storage medium may also include other types of memories or combinations thereof; additionally, the storage medium may be located in a first computer system in which the program is executed, or may be located in a different second computer system, and the second computer system is connected to the first computer system through a network (such as the Internet); the second computer system may provide program instructions to the first computer for execution. The storage medium includes two or more storage media that may reside in different locations (such as in different computer systems connected through a network). The storage medium may store program instructions executable by one or more processors (such as specifically implemented as a computer program).

[0059] Of course, for a storage medium containing computer-executable instructions provided in an embodiment of the present invention, the computer-executable instructions are not limited to the method for suppressing grating lobes of a wide-spacing planar phased array antenna described in the above embodiment, and may also execute related operations in the method for suppressing grating lobes of a wide-spacing planar phased array antenna provided in any embodiment of the present invention.

[0060] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

[0061] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention may have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for suppressing grating lobes of a wide-spacing planar phased array antenna, characterized in that: Suppressing grating lobes by symmetrically dislocating sub-arrays includes: dividing the antenna array surface into symmetrically arranged unit block column sub-arrays of more than 6 even-numbered columns, wherein the azimuth difference beam and the elevation difference beam of the antenna array surface are symmetrically distributed; The unit block column subarrays are arranged from left to right along the x direction, wherein the unit block column subarray in the second column from the left and the unit block column subarray in the second column from the right are staggered with the remaining unit block column subarrays by a set interval, and the first grating lobe is split into two in azimuth.

2. The method for suppressing grating lobes of a wide-spacing planar phased array antenna according to claim 1, characterized in that: Each of the unit block column subarrays is divided into a plurality of antenna modules arranged in a straight line along the y direction, and each of the antenna modules includes a plurality of antenna unit blocks in azimuth and elevation directions arranged in the same matrix array; the unit block column subarray in the second column from the left, the unit block column subarray in the second column from the right, and the remaining unit block column subarrays are staggered at a spacing of 2×dy, where dy is the spacing of the antenna unit blocks along the y direction.

3. The method for suppressing grating lobes of a wide-spacing planar phased array antenna according to claim 2, characterized in that: The azimuth spacing d of the antenna unit blocks in the azimuth direction is set to be calculated as follows: ； Wherein, θ is the electronic scanning range, achieving wide-angle scanning in azimuth, and the electronic scanning angle is greater than 45°; λ is the wavelength.

4. The method for suppressing grating lobes of a wide-spacing planar phased array antenna according to claim 2, characterized in that: The elevation spacing of the antenna unit blocks in the elevation direction is set to 2.67λ0, where λ0 is the central operating wavelength.

5. The method for suppressing grating lobes of a wide-spacing planar phased array antenna according to claim 4, characterized in that: The multiple elevation-direction antenna unit blocks of each antenna module are synthesized by using an equally divided passive power divider, and the multiple elevation-direction antenna unit blocks correspond to one TR component.

6. The method for suppressing grating lobes of a wide-spacing planar phased array antenna according to claim 1, characterized in that: The method for suppressing grating lobes of wide-spacing planar phased array antennas further includes: suppressing grating lobes appearing in far regions to a low level through unit lobes of antenna unit blocks in the unit block column subarray.

7. A wide-spacing planar phased array antenna grating lobe suppression system, which implements the wide-spacing planar phased array antenna grating lobe suppression method according to any one of claims 1 to 6, characterized in that: include: Subarray symmetry module: used to divide the antenna array into symmetrically arranged unit block column subarrays of 6 or more even columns, where the azimuth difference beam and elevation difference beam of the antenna array are symmetrically distributed; Subarray staggering module: used to arrange the unit block column subarrays from left to right along the x direction, wherein the unit block column subarray in the second column from the left and the unit block column subarray in the second column from the right are staggered with the remaining unit block column subarrays by a set spacing, so as to split the first grating lobe into two in the azimuth direction.

8. The wide-span planar phased array antenna grating lobe suppression system according to claim 7, characterized in that: The subarray dislocation module comprises: Subarray staggered spacing setting unit: used to divide each of the unit block column subarrays into a plurality of antenna modules arranged in a straight line along the y direction, each of the antenna modules comprising a plurality of azimuth and elevation antenna unit blocks arranged in the same matrix array; the unit block column subarray in the second column from the left, the unit block column subarray in the second column from the right and the remaining unit block column subarrays are staggered at a spacing of 2×dy, where dy is the spacing of the antenna unit blocks along the y direction.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the grating lobe suppression method for a wide-spacing planar phased array antenna according to any one of claims 1 to 6 is implemented.

10. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the grating lobe suppression method for the wide-spacing planar phased array antenna as described in any one of claims 1 to 6 is implemented.

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