A method and system for suppressing grating lobes of wide-spacing planar phased array antennas

Abstract

The present invention provides a method and system for suppressing grating lobes of a wide-space planar phased array antenna. The method suppresses grating lobes by symmetrically staggering subarrays. The method includes: dividing the antenna array surface into symmetrically arranged unit block column subarrays of 6 or more even columns, wherein the azimuth difference beam and elevation difference beam of the antenna array surface are symmetrically distributed; arranging the unit block column subarrays from left to right along the x-direction, with the unit block column subarrays in the second column from the left and the unit block column subarrays in the second column from the right being staggered with the remaining unit block column subarrays by a set spacing, thereby splitting the first grating lobe into two in the azimuth direction. The present invention has an active channel spacing of 2.67λ0 in the elevation direction, which improves the grating lobe suppression effect; appropriately compresses the elevation spacing to increase the scanning area under the same grating lobe suppression conditions; fully utilizes aperture efficiency, improves aperture utilization, and reduces the number of active channels and array surface cost and weight; the antenna unit blocks are arranged in a matrix array, which is easy to integrate, and the subarray staggered structure and array surface structure layout are easy to implement in engineering.

Description

Technical Field

[0001] The present invention relates to the field of radar detection technology, and in particular 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 typically accounts for 60% to 70% of the radar hardware cost, with the T / R components accounting for over 70% of the cost. Therefore, minimizing the number of array elements and reducing hardware costs while ensuring that antenna radiation performance meets requirements is crucial in engineering applications. Increasing the spacing between array elements in an active phased array antenna is an effective way to reduce the number of elements and lower costs.

[0003] However, conventional antenna array elements with large spacing and periodic arrangement are bound to produce grating lobes, which will affect detection performance. Therefore, grating lobes need to be suppressed. Currently, the main methods for suppressing grating lobes include:

[0004] (1) Use high-efficiency array unit patterns to suppress grating lobes;

[0005] (2) Using a non-periodic array to suppress grating lobes;

[0006] (3) Adopting the optimized unit pattern method: suppressing the grating lobes and the resulting sub-grating lobes by optimizing the amplitude distribution of the sub-array;

[0007] (4) Through spatial filter technology: spatial filters are used at the grating lobe position to suppress the power transmission of electromagnetic waves;

[0008] (5) Using the random distribution method of units: the radiating array elements adopt unequal calibers and the array units are randomly arranged, forming a non-periodic arrangement at the unit level.

[0009] However, the existing methods for suppressing grating lobes have the following disadvantages:

[0010] The method of suppressing grating lobes by using efficient array unit patterns and non-periodic arrays is mainly applicable to circularly polarized antennas. Subarray rotation does not affect the main beam synthesis of the array surface, and grating lobes are not synthesized when shifted in space. However, it is not applicable to linearly polarized antennas and cannot meet the requirements of high gain.

[0011] The method of optimizing the unit pattern is mainly to make the unit pattern more directional. The main means include unit aperture reuse and other methods. However, the method of optimizing the unit pattern will reduce the unit efficiency and array gain.

[0012] The random distribution method of units will destroy the periodicity of the units, affecting the performance consistency and stability of the units themselves;

[0013] The spatial filter technology is mainly realized through the radome filtering technology, which increases the design and processing cost of the radome and is not conducive to the realization of high-power radiation transmission. Summary of the Invention

[0014] 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 staggering the sub-arrays to suppress the grating lobes, a high-gain design of a small number of antenna array surfaces is achieved, the number of active channels is reduced, and the weight and cost of the array surface are reduced, so that it is suitable for radars with high requirements on antenna weight limits (such as artillery position detection radars); wide-angle scanning is adopted in the azimuth plane and small-angle scanning is adopted in the elevation plane, and 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.

[0015] The present invention provides a method for suppressing grating lobes of a wide-spacing planar phased array antenna, which suppresses grating lobes by symmetrically staggering subarrays, including: dividing the antenna array surface into symmetrically arranged 6 columns of unit block subarrays, wherein the azimuth difference beam and the elevation difference beam of the antenna array surface are both symmetrically distributed;

[0016] The unit block column subarrays are arranged from left to right along the x (horizontal) 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 by a set spacing from their left and right adjacent unit block column subarrays, so that the first grating lobe is split into two in the azimuth direction.

[0017] The staggered arrangement of some columns between subarrays splits the first grating lobe (near the sides of the main beam in elevation) into two in azimuth. This effectively suppresses the generation of grating lobes and improves the antenna's directivity and gain. Furthermore, optimizing the subarray arrangement improves the antenna's radiation characteristics in multiple directions, enhancing overall performance. One embodiment of the present invention reduces the first grating lobe by 6dB compared to a conventional rectangular array.

[0018] After the sub-arrays are dislocated, the antenna array surface still adopts a symmetrical arrangement, and the entire antenna array surface still maintains a strictly symmetrical relationship in the azimuth and elevation planes. Therefore, the azimuth difference and elevation difference beams are still symmetrically distributed, and the zero depth index still meets the requirement of less than -30dB, meeting the high detection accuracy requirements of the system.

[0019] In addition, the symmetrical design of the antenna array has the following advantages:

[0020] Reduced Interference: Symmetrical antennas radiate horizontally polarized waves, while most interference is vertically polarized, thus reducing the impact of interference on reception. This characteristic makes symmetrical antennas perform well in complex electromagnetic environments.

[0021] Good Directivity Control: The directional characteristics of antennas make symmetrical antennas advantageous in certain applications. For example, antenna length primarily affects the horizontal pattern, while antenna height primarily affects the vertical pattern. This separation of influences makes symmetrical antenna designs more flexible and can be adjusted to specific needs.

[0022] Balanced properties: Symmetrical antennas are usually balanced, which makes them more stable when connected to unbalanced coaxial cables, reducing signal loss.

[0023] Resonant frequency stability: The resonant frequency of a symmetrical antenna is more stable, and it can show better performance at a specific frequency, which is especially important for systems that require precise frequency control.

[0024] Easy to set up and feed: The symmetrical design of the antenna makes the setting up and feeding process relatively simple, reducing the difficulty of installation and maintenance.

[0025] Furthermore, each of the unit block column subarrays is divided into a plurality of antenna modules arranged in a line along the y direction, and each of the antenna modules includes 8 azimuth × 4 elevation antenna unit blocks arranged in the same matrix array; 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 at a spacing of 2×dy from the adjacent unit block column subarrays on their left and right, where dy is the spacing of the antenna unit blocks along the y direction.

[0026] The number of antenna element blocks in azimuth is twice the number of antenna element blocks in elevation. In practical applications, each antenna module consists of 8 antenna element blocks in azimuth × 4 antenna element blocks in elevation = 32 antenna element blocks.

[0027] Because the array pattern reaches its maximum when the intra-array phase difference and spatial phase difference between the sub-arrays in a phased array column are equal, the sub-arrays have a certain impact on the beamforming performance of the entire antenna array. The division of sub-arrays may lead to the generation of grating lobes. Furthermore, the antenna array achieves array factor scanning by controlling the phase of each sub-array in the array, thereby achieving antenna beam scanning. Because the sub-array spacing far exceeds a free-space wavelength, the array factor exhibits a high number of periodic grating lobes in visible space.

[0028] For subarray-level phased array antennas, suppressing grating lobes essentially involves suppressing the first grating lobe level in the array factor. By designing the subarray offset size, the present invention achieves a y-axis offset of 2×dy between two unit block column subarrays, achieving excellent grating lobe suppression.

[0029] Furthermore, the azimuth spacing d of the antenna unit blocks in the azimuth direction is set to be calculated as follows:

[0030] ;

[0031] Wherein, θ is the electronic scanning range, which realizes wide-angle scanning in azimuth plane, and the electronic scanning angle is greater than 45°; λ is the wavelength.

[0032] The azimuth spacing of antenna element blocks has an important impact on the performance of phased array antennas, mainly including the following aspects:

[0033] Beam scanning capability: The azimuth spacing determines the scanning range and accuracy of the antenna beam in the azimuth plane. Appropriate spacing ensures that the antenna can flexibly scan within the required angular range without causing interference or blind spots.

[0034] ‌Radial Pattern Characteristics‌: The azimuth spacing also affects the antenna's radiative pattern characteristics, including main lobe width and side lobe level. Reasonable spacing design can optimize the antenna's radiation pattern, improving directivity and gain.‌

[0035] Spatial phase difference: The spatial phase difference between adjacent antenna elements is determined by the azimuth spacing and signal propagation distance. This phase difference affects beam formation and pointing, so properly designing the azimuth spacing is crucial for achieving precise beam steering.

[0036] The present invention improves the beam directivity and azimuth pattern characteristics of the phased array antenna by optimizing the azimuth spacing design of the antenna unit blocks in the azimuth direction.

[0037] The present invention has 8 antenna unit blocks in azimuth, the azimuth spacing of the antenna unit blocks is 47 mm, and the 8 antenna unit blocks correspond to 8-channel digital components.

[0038] Furthermore, the elevation spacing of the antenna unit blocks in the elevation direction is set to 61.5 mm.

[0039] In a phased array antenna, the impact of the elevation spacing of antenna unit blocks on the performance of the phased array antenna mainly includes the following aspects:

[0040] Beam width: The pitch spacing affects the beam width. The larger the pitch spacing, the narrower the beam width; the smaller the pitch spacing, the wider the beam width.

[0041] Sidelobe level: Appropriate elevation spacing can reduce sidelobe levels and improve antenna directivity. If the spacing is too large or too small, the sidelobe level may increase, affecting antenna performance.

[0042] Grating lobes: The elevation spacing must also be chosen to avoid the formation of grating lobes. Grating lobes are additional radiation peaks that appear at specific angles in a phased array antenna, affecting the directivity of the main beam. Proper spacing can minimize the impact of grating lobes.

[0043] The present invention optimizes the pitch spacing of antenna unit blocks in the pitch direction, reasonably adjusts the beam width, and reduces the side lobe and grating lobe levels.

[0044] The present invention has four antenna unit blocks in the elevation direction, and the pitch spacing between the antenna unit blocks is 61.5 mm.

[0045] Furthermore, 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 (transceiver component).

[0046] This approach can significantly reduce the number of active channels and lower the cost of TR components. From an engineering implementation perspective, using multiple antenna unit blocks to correspond to one TR component significantly reduces engineering complexity and increases the installation speed of phased array antenna systems.

[0047] Furthermore, the wide-spacing planar phased array antenna grating lobe suppression method further includes: suppressing grating lobes appearing in the far region to a low level through the unit lobes of the antenna unit blocks in the unit block column subarray.

[0048] Grating lobes can be suppressed when the main beam of the radiated beam is parallel to the normal direction and the array element spacing is less than the free-space wavelength. This invention addresses grating lobes that occur in the far-field by optimizing the structural layout of the antenna element blocks in the element block subarray, dispersing the grating lobe energy and effectively suppressing their occurrence.

[0049] The present invention further provides a wide-spacing planar phased array antenna grating lobe suppression system, which implements the wide-spacing planar phased array antenna grating lobe suppression method as described above, comprising:

[0050] Subarray symmetry module: used to divide the antenna array into symmetrically arranged 6 columns of unit block subarrays, and the azimuth difference beam and elevation difference beam of the antenna array are both symmetrically distributed;

[0051] 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 left and right adjacent unit block column subarrays by a set spacing, so as to split the first grating lobe into two in the azimuth direction.

[0052] Furthermore, the subarray stagger module includes:

[0053] Subarray staggered spacing setting unit: used to divide each of the unit block column subarrays into multiple antenna modules arranged in a straight line along the y direction, each of the antenna modules including 8 azimuth × 4 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 their left and right adjacent unit block column subarrays are staggered by a spacing of 2×dy, where dy is the spacing of the antenna unit blocks along the y direction.

[0054] Preferably, a monitoring network is integrated into the antenna unit block to achieve channel-level monitoring.

[0055] Preferably, the antenna unit block realizes the wiring of each RF network simultaneously through a single-layer strip line, which has high wiring density, short RF traces and low loss;

[0056] Preferably, the antenna unit block and the external connection port both have a blind plug function, which facilitates disassembly and installation.

[0057] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the wide-spacing planar phased array antenna grating lobe suppression method as described above.

[0058] The present invention also provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the program, the wide-space planar phased array antenna grating lobe suppression method as described above is implemented.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] The wide-spacing planar phased array antenna grating lobe suppression method and system provided by the present invention designs the pitch-direction active channel spacing to 61.5 mm, and the grating lobe level is only related to the pitch angle and basically does not deteriorate with azimuth scanning; it maintains a low level within the required scanning area, effectively improving the grating lobe suppression effect; by appropriately compressing the pitch spacing, under the same grating lobe suppression conditions, the scanning area becomes larger; the setting of the pitch-direction active channel spacing fully utilizes the aperture efficiency, improves the aperture utilization rate, and reduces the number of active channels, which is reduced to 35.7% of the existing conventional design, thereby greatly reducing the array cost and weight; the antenna unit blocks are arranged in a matrix array, which is easy to integrate, the antenna unit blocks adopt a low-profile design, and the processing technology is simple. The staggered structure between the unit block column sub-arrays and the array structure layout are easy to implement in engineering, suitable for a variety of usage scenarios, and conducive to promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Various other advantages and benefits will become apparent to those skilled in the art by reading the following detailed description of the preferred embodiment.The accompanying drawings are only for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention.

[0062] In the attached figure:

[0063] FIG1 is an antenna array arrangement diagram according to an embodiment of the present invention;

[0064] FIG2 is an internal circuit diagram of an antenna unit block according to an embodiment of the present invention;

[0065] FIG3 is an antenna array and beam normal lobe diagram according to an embodiment of the present invention;

[0066] FIG4 is an antenna array and beam elevation scanning lobe diagram according to an embodiment of the present invention;

[0067] FIG5 is an antenna array and beam oblique lobe diagram according to an embodiment of the present invention;

[0068] FIG6 is a diagram of the normal lobe of the antenna array azimuth difference beam according to an embodiment of the present invention;

[0069] FIG7 is a diagram of an antenna array azimuth difference beam elevation scanning lobe according to an embodiment of the present invention;

[0070] FIG8 is a diagram of an antenna array face azimuth difference beam oblique scanning lobe according to an embodiment of the present invention;

[0071] FIG9 is a diagram of the normal lobe of the antenna array elevation difference beam according to an embodiment of the present invention;

[0072] FIG10 is a diagram of an antenna array elevation difference beam elevation scanning lobe according to an embodiment of the present invention;

[0073] FIG11 is a diagram of an antenna array elevation difference beam oblique scanning lobe according to an embodiment of the present invention;

[0074] Figure 12 Schematic diagram of the structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0075] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of devices and products consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0076] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0077] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining."

[0078] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0079] The embodiment of the present invention provides a method for suppressing grating lobes of a wide-space planar phased array antenna, which suppresses grating lobes by symmetrically staggering sub-arrays, including: dividing the antenna array surface into 6 symmetrically arranged unit block column sub-arrays, and the azimuth difference beam and the pitch difference beam of the antenna array surface are symmetrically distributed (such as Figures 6-11 shown);

[0080] Arrange the unit block column subarrays from left to right along the x (horizontal) direction, wherein the unit block column subarrays in the second column from the left, the unit block column subarrays in the second column from the right and their left and right adjacent unit block column subarrays are staggered by a set spacing, splitting the first grating lobe into two in the azimuth direction. Some columns between the subarrays are staggered to split 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. In addition, optimizing the arrangement of the subarrays can make the antenna have better radiation characteristics in multiple directions and improve the overall performance. This embodiment reduces the first grating lobe of the array factor by 6dB (such as Figure 3-Figure 11 After the sub-arrays are designed to be dislocated, the antenna array still adopts a symmetrical arrangement, and the entire antenna array still maintains a strict symmetrical relationship in the azimuth and elevation planes (as shown in Figure 1 As shown in the figure), the azimuth difference and elevation difference beams are still symmetrically distributed, and the zero depth index meets the requirement of -30dB or less (as shown in the figure). Figure 3-Figure 5 As shown in Figure 2), it can meet the high detection accuracy requirements of the system.

[0081] Each unit block column sub-array is divided into multiple antenna modules arranged in a straight line along the y direction. Each antenna module includes 8 azimuth × 4 elevation antenna unit blocks arranged in the same matrix array. 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 with a spacing of 2×dy, where dy is the spacing of the antenna unit blocks along the y direction (e.g. Figure 1 As shown). Each antenna module consists of 8 antenna unit blocks in azimuth × 4 antenna unit blocks in elevation = 32 antenna unit blocks. Since the array pattern reaches its maximum value when the intra-array phase difference and spatial phase difference between the unit block column sub-arrays of the phased array antenna are equal, 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. In addition, the antenna array surface realizes array factor scanning by controlling the phase of each sub-array in the array, thereby realizing antenna beam scanning. Since the sub-array spacing is much larger than a free space wavelength, the array factor has more periodic grating lobes in the visible space. By designing the sub-array stagger size, the y-direction stagger of the two unit block column sub-arrays is set to 2×dy, and the grating lobe suppression effect is quite good (as shown in FIG. Figure 3-Figure 11 shown).

[0082] The azimuth spacing d of the antenna unit blocks in the azimuth direction is set to be calculated as follows:

[0083] ;

[0084] Wherein, θ is the electronic scanning range, which realizes wide-angle scanning in azimuth plane, and the electronic scanning angle is greater than 45°; λ is the wavelength.

[0085] There are 8 antenna unit blocks in azimuth direction, and the azimuth spacing of the antenna unit blocks is 47mm. The 8 antenna unit blocks correspond to 8-channel digital components. By optimizing the azimuth spacing design of the antenna unit blocks in azimuth direction, the beam directivity and azimuth pattern characteristics of the phased array antenna are improved (such as Figure 3-Figure 11 shown).

[0086] There are 4 antenna unit blocks in the elevation direction, and the pitch spacing of the antenna unit blocks is 61.5mm. By optimizing the pitch spacing of the antenna unit blocks in the elevation direction, the beam width is reasonably adjusted, and the side lobe and grating lobe levels are reduced (such as Figure 3-Figure 11 (As shown). Each antenna module's multiple elevation antenna elements are combined using equally spaced passive power splitters. Each elevation antenna element corresponds to one TR module, significantly reducing the number of active channels and lowering TR module costs. Furthermore, this approach, such as using multiple antenna elements for one TR module, significantly reduces engineering complexity, increases the speed of phased array antenna system installation, and facilitates the engineering implementation of this antenna design.

[0087] To address grating lobes that appear in the far-field, we optimize the structural layout of the antenna unit blocks in the unit block column subarray. By suppressing the unit lobes of the antenna unit blocks in the unit block column subarray to a low level, we disperse the grating lobe energy and effectively suppress the occurrence of far-field grating lobes.

[0088] An embodiment of the present invention further provides a wide-spacing planar phased array antenna grating lobe suppression system, which executes the wide-spacing planar phased array antenna grating lobe suppression method as described above, including:

[0089] Subarray symmetry module: used to divide the antenna array into symmetrically arranged 6 columns of unit block subarrays, and the azimuth difference beam and elevation difference beam of the antenna array are both symmetrically distributed;

[0090] 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 left and right adjacent unit block column subarrays by a set spacing, so as to split the first grating lobe into two in the azimuth direction.

[0091] The subarray dislocation module includes:

[0092] Subarray staggered spacing setting unit: used to divide each of the unit block column subarrays into multiple antenna modules arranged in a straight line along the y direction, each of the antenna modules including 8 azimuth × 4 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 their left and right adjacent unit block column subarrays are staggered by a spacing of 2×dy, where dy is the spacing of the antenna unit blocks along the y direction.

[0093] The antenna unit block is internally designed with a monitoring network (such as Figure 2 as shown), achieving channel-level monitoring.

[0094] The antenna unit block uses a single-layer stripline to simultaneously realize the wiring of each RF network, with high wiring density, short RF traces and low loss;

[0095] The antenna unit block and external connectors both have blind-plug functionality, facilitating disassembly and installation.

[0096] The wide-spacing planar phased array antenna grating lobe suppression method and system of this embodiment designs the active channel spacing in the pitch direction to be 61.5 mm. The grating lobe level is only related to the pitch angle and basically does not deteriorate with azimuth scanning; it maintains 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 active channel spacing in the pitch direction fully utilizes the aperture efficiency, improves the aperture utilization rate, and reduces the number of active channels to 35.7% of the existing conventional design, greatly reducing the array cost and weight; 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. The staggered structure between the unit block column sub-arrays and the array structure layout are easy to implement in engineering.

[0097] An embodiment of the present invention further provides a computer device, Figure 12 This is a schematic diagram of the structure of a computer device provided by an embodiment of the present invention; see the accompanying drawings Figure 12 As 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 wide-space planar phased array antenna grating lobe suppression method provided in the above embodiment; wherein the input device 23, the output device 24, the memory 22 and the processor 21 can be connected by a bus or other means, Figure 12 The bus connection is taken as an example.

[0098] The memory 22 is a readable and writable storage medium of a computing device and can be used to store software programs and computer executable programs, such as the program instructions corresponding to the wide-space planar phased array antenna grating lobe suppression method described in the embodiment of the present invention. The memory 22 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function; the data storage area can store data created based on the use of the device, etc. In addition, the memory 22 can include a high-speed random access memory and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 22 can further include a memory remotely located relative to the processor 21, and these remote memories can be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0099] The input device 23 may be used to receive input digital or character information, and generate key signal input related to user settings and function control of the device; the output device 24 may include a display device such as a display screen.

[0100] 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, realizes the above-mentioned wide-spacing planar phased array antenna grating lobe suppression method.

[0101] The computer device provided above can be used to execute the wide-spacing planar phased array antenna grating lobe suppression method provided in the above embodiment, and has corresponding functions and beneficial effects.

[0102] An embodiment of the present invention also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform the wide-space planar phased array antenna grating lobe suppression method 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 memory or random access memory, such as DRAM, DDRRAM, SRAM, EDORAM, Rambus RAM, etc.; non-volatile memory, such as flash memory, magnetic media (such as hard disks or optical storage); registers or other similar types of memory components; the storage medium may also include other types of memory or a combination thereof; in addition, the storage medium may be located in the first computer system in which the program is executed, or may be located in a different second computer system, which is connected to the first computer system via 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 can reside in different locations (for example, in different computer systems connected via a network). The storage medium can store program instructions (for example, specifically implemented as a computer program) that can be executed by one or more processors.

[0103] Of course, the storage medium containing computer-executable instructions provided in an embodiment of the present invention is not limited to the wide-spacing planar phased array antenna grating lobe suppression method described in the above embodiment, and can also execute related operations in the wide-spacing planar phased array antenna grating lobe suppression method provided in any embodiment of the present invention.

[0104] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0105] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for suppressing grating lobes of a wide-spacing planar phased array antenna, characterized in that: Grating lobes are suppressed by symmetrically dislocating sub-arrays, including: dividing the antenna array surface into symmetrically arranged six columns of unit block sub-arrays, wherein the azimuth difference beam and the elevation difference beam of the antenna array surface are both symmetrically distributed; 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 a preset spacing from their left and right adjacent unit block column subarrays, and split the first grating lobe into two in the azimuth direction; Each of the unit block column subarrays is divided into a plurality of antenna modules arranged in a straight line along the y-direction, each of the antenna modules comprising 8 azimuth × 4 elevation antenna unit blocks arranged in the same matrix array; 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 spacing of 2 × dy from the adjacent unit block column subarrays on their left and right, where dy is the spacing of the antenna unit blocks along the y-direction; The azimuth spacing d of the antenna unit blocks in the azimuth direction is set to 47 mm; The elevation spacing of the antenna unit blocks in the elevation direction is set to 61.5 mm.

2. The method for suppressing grating lobes of a wide-spacing planar phased array antenna according to claim 1, 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.

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

4. 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 3, characterized in that: include: A subarray symmetry module is used to divide the antenna array into symmetrically arranged 6 columns of unit block subarrays, and the azimuth difference beam and elevation difference beam of the antenna array are both symmetrically distributed; a subarray staggering module, configured 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 by a preset interval from their left and right adjacent unit block column subarrays, thereby splitting the first grating lobe into two in the azimuth direction; Each of the unit block column subarrays is divided into a plurality of antenna modules arranged in a straight line along the y-direction, each of the antenna modules comprising 8 azimuth × 4 elevation antenna unit blocks arranged in the same matrix array; 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 spacing of 2 × dy from the adjacent unit block column subarrays on their left and right, where dy is the spacing of the antenna unit blocks along the y-direction; The azimuth spacing d of the antenna unit blocks in the azimuth direction is set to 47 mm; The elevation spacing of the antenna unit blocks in the elevation direction is set to 61.5 mm.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the wide-spacing planar phased array antenna grating lobe suppression method according to any one of claims 1 to 3 is implemented.

6. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the wide-spacing planar phased array antenna grating lobe suppression method according to any one of claims 1 to 3 is implemented.

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