Array antenna resonant cavity radiation structure forming optimization method and system

Abstract

The invention provides an array antenna resonant cavity radiation structure forming optimization method and system, belongs to the technical field of antennas, and is used for realizing high gain of wave beams by designing and optimizing a resonant cavity radiation structure in an array antenna. The method comprises the steps that the electronic equipment obtains an initial antenna array, the initial antenna array is a matrix type antenna array comprising M * N antenna units, M is the row number of a matrix, N is the column number of the matrix, and each antenna unit in the M * N antenna units is an antenna unit of a resonant cavity structure; the electronic equipment uniformly divides an initial antenna array into K sub-arrays, wherein K is an integer greater than 1; for the ith sub-array, the electronic equipment optimizes radiation structures of resonant cavities of at least part of antenna units in the ith sub-array to obtain the ith optimized sub-array, and a first antenna array is obtained under the condition that i traverses 1 to K; and the electronic equipment optimizes the radiation structures of the resonant cavities of part of the antenna units in the first antenna array to obtain a second antenna array.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a method and system for optimizing the shaping of a resonant cavity radiation structure of an array antenna. Background Art

[0002] A resonant cavity antenna is a device that uses the frequency selection and energy storage characteristics of a resonant cavity to enhance antenna performance. They are usually composed of a feed, a ground plane, and a reflector, and are widely used in communication systems that require high gain and specific frequency selectivity.

[0003] The specific characteristics of the resonant cavity antenna are as follows: High gain characteristics: Resonant cavity antennas are favored in many applications due to their high gain characteristics. For example, the Fabry-Perot (FP) resonant cavity antenna significantly improves the gain of the antenna by adding a partially reflective cover plate above the microstrip antenna. Band limitations: Traditional resonant cavity antennas belong to the category of narrowband antennas, which means that their gain bandwidth is narrow. In order to broaden the operating frequency band, researchers have adopted various methods, such as optimizing the structure of the reflective layer and using multi-layer dielectrics to construct the reflective layer. Although these methods are effective, they increase the design complexity and manufacturing cost. Low-profile design: Low-profile antennas are very important in many modern applications, especially in space-constrained devices. For example, the subwavelength resonant cavity antenna based on a double-layer magnetic single negative material is designed to overcome the problems of the narrow frequency band of traditional microstrip patch antennas while maintaining low-profile characteristics, which is suitable for space applications such as space-borne satellites. Multi-band operation: With the development of communication technology, the demand for antennas that can operate on multiple frequency bands has increased. The design of dual-frequency and multi-frequency resonant cavity antennas, such as dielectric-loaded and frequency selective surface (FSS)-loaded dual-frequency resonant cavity antennas, enables the antenna to work efficiently in different frequency bands to meet diverse communication needs. Special structural design: Some application scenarios require the antenna to have a specific shape or function, such as a cylindrical conformal FP resonant cavity antenna. This design is suitable for cylindrical carriers to ensure that the antenna performance matches the carrier shape. In addition, the folded waveguide resonant cavity antenna solves the problem of large size of traditional waveguide antennas through structural innovation, and adapts to the needs of miniaturized electronic products. Polarization characteristics: The polarization characteristics of the antenna have a significant impact on its performance. The broadband high-gain polarization-converted FP resonant cavity antenna combines high gain and wideband characteristics, while supporting circular polarization, enhancing anti-interference capabilities and the ability to adapt to complex electromagnetic environments.

[0004] Currently, resonant cavity antennas have been applied to multi-beam systems. In this case, how to ensure high gain of the beam is a current research issue. Summary of the invention

[0005] The embodiment of the present invention provides a method and system for optimizing the shaping of a resonant cavity radiation structure of an array antenna, which are used to achieve high gain of a beam by designing and optimizing the resonant cavity radiation structure in an array antenna.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] In a first aspect, a method for optimizing the formation of a radiation structure of a resonant cavity of an array antenna is provided, which is applied to an electronic device. The method comprises: the electronic device obtains an initial antenna array, the initial antenna array is a matrix antenna array including M*N antenna units, M is the number of rows of the matrix, N is the number of columns of the matrix, M and N are both integers greater than 1, and each of the M*N antenna units is an antenna unit of a resonant cavity structure; the electronic device evenly divides the initial antenna array into K subarrays, K is an integer greater than 1; for an i-th subarray among the K subarrays, the electronic device optimizes the radiation structure of the resonant cavity of at least some antenna units in the i-th subarray to obtain the i-th optimized subarray, the grating lobe of the beam of the i-th optimized subarray is smaller than the grating lobe of the beam of the i-th subarray, and when i traverses 1 to K, a first antenna array is obtained; the electronic device optimizes the radiation structure of the resonant cavity of some antenna units in the first antenna array to obtain a second antenna array, the grating lobe of the beam of the second antenna array is smaller than the grating lobe of the beam of the first antenna array.

[0008] Optionally, each antenna unit is a hexahedral rectangular structure, a first slot is provided on a first surface of the rectangular structure, the first slot is parallel to a first side where a second surface and the first surface intersect in the rectangular structure, the first slot and an internal cavity of the rectangular structure form a resonant cavity structure, a third surface of the rectangular structure that intersects with the first surface and is parallel to the second surface is provided with a feeding portion, a second side between the second surface and the third surface is perpendicular to the first slot, and the electronic device optimizing the radiation structure of the resonant cavity of the antenna unit means that the electronic device adjusts the length of the second side of the antenna unit.

[0009] Optionally, the i-th subarray is a matrix subarray including 2*2 antenna units, and the electronic device optimizes the radiation structure of the resonant cavity of at least part of the antenna units in the i-th subarray to obtain the i-th optimized subarray, including: the electronic device sets the structure of the target antenna unit in the i-th subarray to a second side with a maximum length within a preset length range, and when the second side of the target antenna unit is set to the maximum length, the signal radiation range of the target antenna unit is the largest; the electronic device combines the structure of the target antenna unit with the structures of the second sides of at least two antenna units at different lengths to obtain multiple preselected subarrays; at least two antenna units are antenna units other than the target antenna unit in the i-th subarray, and the different lengths of the second side of any one of the at least two antenna units are all lengths within the preset length range; the electronic device simulates the first beam pattern of each preselected subarray of the multiple preselected subarrays to obtain a total of multiple first beam patterns; the electronic device determines the first beam pattern with the smallest average grating lobe among the multiple first beam patterns, and determines the preselected subarray corresponding to the first beam pattern with the smallest average grating lobe as the i-th optimized subarray.

[0010] Optionally, when M=2 and N=4, the initial antenna array is a 2*4 matrix antenna array, when K=2, K subarrays are 2 subarrays, the first subarray of the 2 subarrays is a 2*2 matrix antenna array consisting of the first 2 columns and 2 rows of the 2*4 matrix antenna array, and the second subarray of the 2 subarrays is a 2*2 matrix antenna array consisting of the last 2 columns and 2 rows of the 2*4 matrix antenna array, and when i=1, the target antenna unit in the i-th subarray is the 2 antenna units located on the 1st column of the i-th subarray, and when i=2, the target antenna unit in the i-th subarray is the 2 antenna units located on the 2nd column of the i-th subarray.

[0011] Optionally, some of the antenna units in the first antenna array are two antenna units other than the target antenna unit, and the first antenna array other than the two antenna units are the remaining six antenna units; the electronic device optimizes the radiation structure of the resonant cavity of some of the antenna units in the first antenna array to obtain a second antenna array, including: the electronic device combines the structure of the six antenna units with the structure of the second sides of the two antenna units at different lengths to obtain multiple preselected antenna arrays; the structure of the six antenna units refers to the structure in the first antenna array; the different lengths of the second sides of any one of the two antenna units are all lengths within a preset length range; the electronic device simulates the second beam pattern of each preselected antenna array of the multiple preselected antenna arrays to obtain a total of multiple second beam patterns; the electronic device determines the second beam pattern with the smallest average grating lobe among the multiple second beam patterns, and determines the preselected antenna array corresponding to the second beam pattern with the smallest average grating lobe as the second antenna array.

[0012] Optionally, the 2 antenna units include: the antenna unit located in the 3rd column and the 1st row in a 2*4 matrix antenna array, and the antenna unit located in the 4th column and the 2nd row in the 2*4 matrix antenna array, or; the 2 antenna units include: the antenna unit located in the 3rd column and the 2nd row in the 2*4 matrix antenna array, and the antenna unit located in the 4th column and the 1st row in the 2*4 matrix antenna array.

[0013] Optionally, when M=4 and N=4, the initial antenna array is a 4*4 matrix antenna array, and when K=4, the K subarrays are 4 subarrays, the first subarray of the 4 subarrays is a 2*2 matrix antenna array consisting of the first 2 columns and the first 2 rows in the 4*4 matrix antenna array, the second subarray of the 4 subarrays is a 2*2 matrix antenna array consisting of the last 2 columns and the first 2 rows in the 4*4 matrix antenna array, the third subarray of the 4 subarrays is a 2*2 matrix antenna array consisting of the first 2 columns and the last 2 rows in the 4*4 matrix antenna array, and the fourth subarray of the 4 subarrays is a 4*4 matrix antenna array. The 2*2 matrix antenna array is composed of the last 2 columns and the last 2 rows in the ith antenna array. When i=1, the target antenna unit in the ith subarray is the antenna unit located at the 1st column and the 1st row in the ith subarray. When i=2, the target antenna unit in the ith subarray is the antenna unit located at the 2nd column and the 1st row in the ith subarray. When i=3, the target antenna unit in the ith subarray is the antenna unit located at the 1st column and the 2nd row in the ith subarray. When i=4, the target antenna unit in the ith subarray is the antenna unit located at the 2nd column and the 2nd row in the ith subarray.

[0014] Optionally, some of the antenna units in the first antenna array are 4 antenna units other than the target antenna unit, and the first antenna array other than the 4 antenna units are the remaining 12 antenna units; the electronic device optimizes the radiation structure of the resonant cavity of some of the antenna units in the first antenna array to obtain a second antenna array, including: the electronic device combines the structure of the 12 antenna units with the structure of the second sides of the 4 antenna units at different lengths to obtain multiple preselected antenna arrays; the structure of the 12 antenna units refers to the structure in the first antenna array; the different lengths of the second sides of any one of the 4 antenna units are all lengths within a preset length range; the electronic device simulates the second beam pattern of each preselected antenna array of the multiple preselected antenna arrays to obtain a total of multiple second beam patterns; the electronic device determines the second beam pattern with the smallest average grating lobe among the multiple second beam patterns, and determines the preselected antenna array corresponding to the second beam pattern with the smallest average grating lobe as the second antenna array.

[0015] Optionally, the four antenna units include: the antenna unit located in the 2nd column and the 2nd row in the 4*4 matrix antenna array, the antenna unit located in the 3rd column and the 2nd row in the 4*4 matrix antenna array, the antenna unit located in the 2nd column and the 3rd row in the 4*4 matrix antenna array, and the antenna unit located in the 3rd column and the 3rd row in the 4*4 matrix antenna array.

[0016] In a second aspect, a system for optimizing the formation of a radiation structure of a resonant cavity of an array antenna is provided. The system includes an electronic device, and the system is configured as follows: the electronic device obtains an initial antenna array, the initial antenna array is a matrix antenna array including M*N antenna units, M is the number of rows of the matrix, N is the number of columns of the matrix, M and N are both integers greater than 1, and each of the M*N antenna units is an antenna unit of a resonant cavity structure; the electronic device evenly divides the initial antenna array into K subarrays, K is an integer greater than 1; for an i-th subarray among the K subarrays, the electronic device optimizes the radiation structure of the resonant cavity of at least some of the antenna units in the i-th subarray to obtain the i-th optimized subarray, the grating lobe of the beam of the i-th optimized subarray is smaller than the grating lobe of the beam of the i-th subarray, and when i traverses 1 to K, a first antenna array is obtained; the electronic device optimizes the radiation structure of the resonant cavity of some antenna units in the first antenna array to obtain a second antenna array, the grating lobe of the beam of the second antenna array is smaller than the grating lobe of the beam of the first antenna array.

[0017] In summary, the electronic device can simulate the structure of the antenna array, such as the initial modeled initial antenna array, which is a matrix antenna array including M*N antenna units, each of which is an antenna unit of a resonant cavity structure. The electronic device can evenly divide the initial antenna array into K subarrays, each of which has a separate beamforming capability. In this way, for the i-th subarray, the electronic device can optimize the radiation structure of the resonant cavity of at least part of the antenna units in the i-th subarray to obtain the i-th optimized subarray, and the grating lobe of the beam of the i-th optimized subarray is smaller than the grating lobe of the beam of the i-th subarray, that is, by reducing the grating lobe, the gain of each subarray when performing beamforming alone is improved. The electronic device can construct a first antenna array based on each optimized sub-array, and further optimize the radiation structure of the resonant cavity of some antenna units in the first antenna array to obtain a second antenna array. At this time, since the grating lobe of the beam of the second antenna array is smaller than the grating lobe of the beam of the first antenna array, it is achieved that while each sub-array has a certain gain when beamforming is performed individually, the entire antenna array can also have a good gain when beamforming is performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a process for optimizing the formation of a radiation structure of an array antenna resonant cavity provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the structure of an antenna array in a method for optimizing the formation of a radiation structure of an array antenna resonant cavity provided in an embodiment of the present invention;

[0020] Figure 3A schematic diagram of the structure of an antenna unit in a method for optimizing the formation of a radiation structure of an array antenna resonant cavity provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the signal radiation range in the array antenna resonant cavity radiation structure shaping optimization method provided in an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of beams and grating lobes in a method for optimizing the shaping of a radiation structure of an array antenna resonant cavity provided in an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In the embodiment of the present invention, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information (such as the first indication information, the second indication information, or the third indication information, etc. below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein the other information has an association relationship with the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be realized by means of the arrangement order of each information agreed in advance (such as specified by the protocol), thereby reducing the indication overhead to a certain extent. At the same time, the common parts of each information can also be identified and uniformly indicated to reduce the indication overhead caused by indicating the same information separately.

[0025] In addition, the specific indication method may also be various existing indication methods, such as but not limited to the above-mentioned indication methods and various combinations thereof. The specific details of the various indication methods can refer to the prior art and will not be repeated herein. As can be seen from the above, for example, when it is necessary to indicate multiple information of the same type, different indication methods may be used for different information. In the specific implementation process, the desired indication method can be selected according to specific needs. The embodiment of the present invention does not limit the selected indication method. In this way, the indication method involved in the embodiment of the present invention should be understood to cover various methods that can enable the party to be indicated to obtain the information to be indicated.

[0026] "Pre-definition" or "pre-configuration" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in the device, and the embodiments of the present invention do not limit the specific implementation method. Among them, "saving" can mean saving in one or more memories. The one or more memories can be set separately or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories can also be partially set separately and partially integrated in a decoder, a processor, or a communication device. The type of memory can be any form of storage medium, which is not limited by the embodiments of the present invention.

[0027] The "protocol" involved in the embodiments of the present invention may refer to a protocol family in the communication field, a standard protocol with a similar protocol family frame structure, or a related protocol applied in future communication systems, and the embodiments of the present invention do not specifically limit this.

[0028] In the embodiments of the present invention, descriptions such as "when...", "in the case of...", "if" and "if" all mean that the device will perform corresponding processing under certain objective circumstances, but do not limit the time, nor do they require the device to perform judgment actions when implementing, nor do they mean the existence of other limitations.

[0029] In the description of the embodiments of the present invention, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; "and / or" in the embodiments of the present invention is only a kind of association relationship describing the associated objects, indicating that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In addition, in the description of the embodiments of the present invention, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple. In addition, in order to facilitate the clear description of the technical solution of the embodiments of the present invention, in the embodiments of the present invention, the words "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. Those skilled in the art will appreciate that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference. At the same time, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

[0030] The network architecture and business scenarios described in the embodiments of the present invention are intended to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute a limitation on the technical solutions provided by the embodiments of the present invention. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present invention are equally applicable to similar technical problems.

[0031] A method for optimizing the shaping of a radiation structure of a resonant cavity of an array antenna provided by an embodiment of the present invention is described below.

[0032] The array antenna resonant cavity radiation structure shaping optimization method is performed by an electronic device, which may be a terminal, which may be a terminal with a communication control function, or a chip or chip system that can be set in the terminal. The terminal may also be called user equipment (UE), access terminal, subscriber unit, user station, mobile station (MS), mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device. The terminal in the embodiments of the present invention may be a mobile phone, a cellular phone, a smart phone, a tablet computer, a wireless data card, a personal digital assistant (PDA), a wireless modem, a handset, a laptop computer, a machine type communication (MTC) terminal, a computer with a wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a vehicle-mounted terminal, a road side unit (RSU) with a terminal function, etc. The terminal of the present invention may also be an on-board module, an on-board module, an on-board component, an on-board chip or an on-board unit built into a vehicle as one or more components or units.

[0033] like Figure 1 As shown, the process of this method is as follows:

[0034] S101, the electronic device obtains an initial antenna array.

[0035] The electronic device obtaining the initial antenna array can be understood as the electronic device performing preliminary modeling of the antenna array to obtain the initial antenna array, wherein the structure of each antenna unit in the initial antenna array is constructed according to the initial setting to facilitate subsequent optimization and adjustment. The modeling method can be implemented using existing modeling software, and there is no specific limitation.

[0036] The initial antenna array may be a matrix antenna array including M*N antenna units, where M is the number of rows of the matrix, N is the number of columns of the matrix, M and N are both integers greater than 1, and each of the M*N antenna units is an antenna unit of a resonant cavity structure. Figure 2 As shown in (a), when M=2 and N=4, the initial antenna array is a 2*4 matrix antenna array, such as Figure 2 As shown in (b), when M=4 and N=4, the initial antenna array is a 4*4 matrix antenna array. In this case, each antenna unit can be described by its position in the matrix antenna array, such as the antenna unit in the 1st row and 1st column, the antenna unit in the 3rd row and 3rd column, etc.

[0037] like Figure 3 As shown, each antenna unit 30 is a hexahedral rectangular structure, and a first slot 302 is provided on a first surface 301 of the rectangular structure. The first slot 302 can be provided in the middle of the first surface 301 , and the width of the first slot 302 can be denoted as W.

[0038] The first slot 302 is parallel to the first side 304 where the second side 303 and the first side 301 of the rectangular structure intersect, the first slot 302 and the internal cavity of the rectangular structure form a resonant cavity structure, the third side 305 of the rectangular structure intersecting with the first side 301 and parallel to the second side 303 is provided with a feeding part 306, the second side 307 between the second side 303 and the third side 305 is perpendicular to the first slot 302, and the electronic device optimizing the radiation structure of the resonant cavity of the antenna unit means that the electronic device adjusts the length of the second side 307 of the antenna unit. In addition, the third side 308 is perpendicular to the first side 304 and the second side 307. Among them, Figure 2 What is shown is the second side 303 of the antenna unit 30 .

[0039] In one example, taking the first side 304 as 100 mm, the third side 308 as 18 mm, and W as 4 mm, the adjustable range of the second side 307, or the preset length range, is 6-8 mm. The length of the second side 307 can be adjusted within 6-8 mm. For example, with a step of 0.5 mm, the length of the second side 307 can include: 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, that is, 5 lengths. Figure 4 As shown, when the lengths of the second side 307 are 6 mm, 6.5 mm, 7 mm, 7.5 mm, and 8 mm, respectively, the signal radiation ranges of the antenna unit 30 in the three-dimensional space can be respectively as follows: Figure 4 As shown, it can be seen that as the length increases, the signal radiation range also increases. When the length of the second side 307 is 8 mm, the signal radiation range is the largest.

[0040] S102, the electronic device evenly divides the initial antenna array into K sub-arrays, where K is an integer greater than 1.

[0041] The electronic device can be divided according to a 2*2 granularity, for example, i is an integer ranging from 1 to K, and for the i-th subarray among the K subarrays, the i-th subarray is a matrix subarray containing 2*2 antenna units. The i-th subarray can be beamformed separately to enable the antenna panel to transmit K beams simultaneously.

[0042] For an initial antenna array of 2*4 matrix antenna array, such as Figure 2 As shown in (a), when K=2, K subarrays are 2 subarrays, the first subarray of the 2 subarrays is a 2*2 matrix antenna array composed of the first 2 columns and 2 rows in the 2*4 matrix antenna array, and the second subarray of the 2 subarrays is a 2*2 matrix antenna array composed of the last 2 columns and 2 rows in the 2*4 matrix antenna array. For the initial antenna array being a 4*4 matrix antenna array, as shown in Figure 2 As shown in (4), when K=4, K subarrays are 4 subarrays, the first subarray of the 4 subarrays is a 2*2 matrix antenna array consisting of the first 2 columns and the first 2 rows in the 4*4 matrix antenna array, the second subarray of the 4 subarrays is a 2*2 matrix antenna array consisting of the last 2 columns and the first 2 rows in the 4*4 matrix antenna array, the third subarray of the 4 subarrays is a 2*2 matrix antenna array consisting of the first 2 columns and the last 2 rows in the 4*4 matrix antenna array, and the fourth subarray of the 4 subarrays is a 2*2 matrix antenna array consisting of the last 2 columns and the last 2 rows in the 4*4 matrix antenna array.

[0043] It can be understood that the present invention takes the 2*4 / 4*4 matrix antenna array as an example, without limitation, and it can also be 2*6 / 6*6 / 2*8 / 8*8, etc.

[0044] S103, for the i-th subarray among the K subarrays, the electronic device optimizes the radiation structure of the resonant cavity of at least part of the antenna units in the i-th subarray to obtain the i-th optimized subarray, and when i traverses from 1 to K, a first antenna array is obtained.

[0045] The grating lobe of the beam of the i-th optimized subarray is smaller than the grating lobe of the beam of the i-th subarray, that is, the optimized grating lobe is smaller than the grating lobe in the initial modeling case.

[0046] Specifically, taking the i-th subarray as an example, the electronic device can set the structure of the target antenna unit in the i-th subarray so that the second side has the maximum length within a preset length range. When the second side of the target antenna unit is set to the maximum length, the signal radiation range of the target antenna unit is the largest, such as the length of the second side of the target antenna unit is 8 mm.

[0047] Wherein, for a matrix antenna array whose initial antenna array is 2*4, when i=1, the target antenna unit in the ith subarray is the two antenna units located in the first column of the ith subarray, and when i=2, the target antenna unit in the ith subarray is the two antenna units located in the second column of the ith subarray. For a matrix antenna array whose initial antenna array is 4*4, when i=1, the target antenna unit in the ith subarray is the antenna unit located in the first column and the first row of the ith subarray, when i=2, the target antenna unit in the ith subarray is the antenna unit located in the second column and the first row of the ith subarray, when i=3, the target antenna unit in the ith subarray is the antenna unit located in the first column and the second row of the ith subarray, and when i=4, the target antenna unit in the ith subarray is the antenna unit located in the second column and the second row of the ith subarray. That is, since the structure of the antenna unit located in the middle needs to be adjusted when optimizing the antenna array later, the target antenna unit needs to be selected as the antenna unit located at the edge as much as possible.

[0048] It can be understood that setting the second side of the target antenna unit to the maximum length is to ensure that each subarray has a target antenna unit with the maximum gain to ensure the overall gain. However, setting all antenna units in the subarray to the maximum gain is not the optimal solution, that is, the grating lobe may be relatively large. Therefore, it is necessary to adjust the structure of other antenna units in the i-th subarray except the target antenna unit, that is, the length of the second side, to find the optimal structure under various length combinations, as follows.

[0049] The electronic device combines the structure of the target antenna unit (i.e., the structure when the length of the second side is the largest) with the structures of the second sides of at least two antenna units at different lengths to obtain a plurality of preselected subarrays. The at least two antenna units are antenna units other than the target antenna unit in the i-th subarray, and the different lengths of the second side of any one of the at least two antenna units are all lengths within a preset length range (such as the above-mentioned 5 lengths). Taking the initial antenna array as a 2*4 matrix antenna array and i=1 as an example, in the first subarray, the second side of the antenna unit located in the first row and the second column has 5 lengths, and the second side of the antenna unit located in the second row and the second column also has 5 lengths, and a total of 25 pre-selected subarrays are obtained by combination. The first pre-selected subarray is: the two target antenna units located in the first column of the 1-2 rows have a second side with the longest length, the antenna unit located in the first row and the second column has a second side of 6 mm, and the antenna unit located in the second row and the second column has a second side of 6 mm. The second pre-selected subarray is: the two target antenna units located in the first column of the 1-2 rows have a second side with the longest length, and the antenna unit located in the first row and the second column has a second side of 6 mm. The antenna unit in the 2nd column has a second side of 6.5 mm, the antenna unit in the 2nd row and the 2nd column has a second side of 6 mm, the 3rd pre-selected subarray is: the 2 target antenna units in the 1st row and the 1st column have a second side of the longest length, the antenna unit in the 1st row and the 2nd column has a second side of 7 mm, the antenna unit in the 2nd row and the 2nd column has a second side of 6 mm, and so on. The 25th pre-selected subarray is: the 2 target antenna units in the 1st row and the 1st column have a second side of the longest length, the antenna unit in the 1st row and the 2nd column has a second side of 8 mm, and the antenna unit in the 2nd row and the 2nd column has a second side of 8 mm.

[0050] The electronic device simulates the first beam pattern of each preselected subarray of the plurality of preselected subarrays, and obtains a plurality of first beam patterns in total. On this basis, the electronic device can determine the first beam pattern with the smallest average grating lobe among the plurality of first beam patterns (i.e., the average value of the amplitudes of all grating lobes in a first beam pattern is the smallest), and determines the preselected subarray corresponding to the first beam pattern with the smallest average grating lobe as the i-th optimized subarray, or determines the structure of each antenna unit in the i-th optimized subarray, or determines the resonant cavity radiation structure, i.e., the length of the second side. By determining each optimized subarray, a structure of the antenna array is determined, i.e., the first antenna array is determined.

[0051] S104, the electronic device optimizes the radiation structure of the resonant cavity of some antenna units in the first antenna array to obtain a second antenna array.

[0052] The grating lobe of the beam of the second antenna array is smaller than the grating lobe of the beam of the first antenna array, that is, the optimized grating lobe is smaller than the grating lobe in the initial modeling case.

[0053] For a matrix antenna array with an initial antenna array of 2*4:

[0054] Some antenna units in the first antenna array (i.e., antenna units that need to be optimized again) are two antenna units other than the target antenna unit, and the first antenna array is composed of the remaining six antenna units other than the two antenna units. Figure 2 As shown in (a), the two antenna units include: the antenna unit located at the 3rd column and the 1st row in the 2*4 matrix antenna array, and the antenna unit located at the 4th column and the 2nd row in the 2*4 matrix antenna array, or; the two antenna units include: the antenna unit located at the 3rd column and the 2nd row in the 2*4 matrix antenna array, and the antenna unit located at the 4th column and the 1st row in the 2*4 matrix antenna array, that is, try to select the antenna unit located in the center.

[0055] On this basis, the electronic device can combine the structures of the six antenna units with the structures of the second sides of the two antenna units at different lengths to obtain multiple preselected antenna arrays. The structure of the six antenna units refers to the structure in the first antenna array, that is, the structure determined by the above optimization. The different lengths of the second side of any one of the two antenna units are all lengths within a preset length range (such as the five lengths mentioned above). The electronic device can simulate the second beam pattern of each preselected antenna array of the multiple preselected antenna arrays to obtain a total of multiple second beam patterns; the electronic device determines the second beam pattern with the smallest average grating lobe among the multiple second beam patterns, and determines the preselected antenna array corresponding to the second beam pattern with the smallest average grating lobe as the second antenna array. The specific principle is similar to the above, which can be referred to for understanding and will not be repeated here.

[0056] It can be understood that, since only one antenna unit structure of the optimized first subarray and the second subarray is adjusted in S104, the overall beamforming gain of the subarray will not be exceeded. Even if the gain is reduced, it is within the range that allows or can ensure the communication quality.

[0057] For a 4*4 matrix antenna array as the initial antenna array:

[0058] Some antenna units in the first antenna array (i.e., antenna units that need to be structurally optimized again) are 4 antenna units other than the target antenna unit, and the first antenna array other than the 4 antenna units are the remaining 12 antenna units; the 4 antenna units include: the antenna unit located in the 2nd column and 2nd row of the 4*4 matrix antenna array, the antenna unit located in the 3rd column and 2nd row of the 4*4 matrix antenna array, the antenna unit located in the 2nd column and 3rd row of the 4*4 matrix antenna array, and the antenna unit located in the 3rd column and 3rd row of the 4*4 matrix antenna array.

[0059] On this basis, the electronic device combines the structures of the 12 antenna units with the structures of the second sides of the four antenna units at different lengths to obtain multiple preselected antenna arrays; the structure of the 12 antenna units refers to the structure in the first antenna array; the different lengths of the second sides of any one of the four antenna units are all lengths within a preset length range (such as the five lengths mentioned above); the electronic device simulates the second beam pattern of each preselected antenna array of the multiple preselected antenna arrays to obtain a total of multiple second beam patterns; the electronic device determines the second beam pattern with the smallest average grating lobe among the multiple second beam patterns, and determines the preselected antenna array corresponding to the second beam pattern with the smallest average grating lobe as the second antenna array. The specific principles are similar to those mentioned above and can be used as a reference for understanding, so they will not be repeated here.

[0060] It can be understood that, since only one antenna unit structure of each of the four optimized subarrays is adjusted in S104, the overall beamforming gain of the subarray will not be exceeded. Even if the gain is reduced, it is within the range that allows or can ensure the communication quality.

[0061] like Figure 5 As shown in the figure, taking three beams as an example, the grating lobes of the initial antenna array are relatively large. After optimization, the grating lobes of the second antenna array are significantly reduced, the gain of the beam is increased, and the communication effect is better.

[0062] In addition, S103-S104 of the present invention may also be executed in a polling iterative manner, that is, if executing S104 has a greater impact on the gain of the subarray, then the process may return to S103, select the suboptimal one according to the average size of the grating lobe, and then execute 104 until the gain of the subarray and the antenna array is taken into account.

[0063] In summary, the electronic device can simulate the structure of the antenna array, such as the initial modeled initial antenna array, which is a matrix antenna array including M*N antenna units, each of which is an antenna unit of a resonant cavity structure. The electronic device can evenly divide the initial antenna array into K subarrays, each of which has a separate beamforming capability. In this way, for the i-th subarray, the electronic device can optimize the radiation structure of the resonant cavity of at least part of the antenna units in the i-th subarray to obtain the i-th optimized subarray, and the grating lobe of the beam of the i-th optimized subarray is smaller than the grating lobe of the beam of the i-th subarray, that is, by reducing the grating lobe, the gain of each subarray when performing beamforming alone is improved. The electronic device can construct a first antenna array based on each optimized sub-array, and further optimize the radiation structure of the resonant cavity of some antenna units in the first antenna array to obtain a second antenna array. At this time, since the grating lobe of the beam of the second antenna array is smaller than the grating lobe of the beam of the first antenna array, it is achieved that while each sub-array has a certain gain when beamforming is performed individually, the entire antenna array can also have a good gain when beamforming is performed.

[0064] An embodiment of the present invention further provides an array antenna resonant cavity radiation structure forming optimization system, the system includes an electronic device, and the system is configured as follows: the electronic device obtains an initial antenna array, the initial antenna array is a matrix antenna array including M*N antenna units, M is the number of rows of the matrix, N is the number of columns of the matrix, M and N are both integers greater than 1, and each of the M*N antenna units is an antenna unit of a resonant cavity structure; the electronic device evenly divides the initial antenna array into K subarrays, K is an integer greater than 1; for the i-th subarray among the K subarrays, the electronic device optimizes the radiation structure of the resonant cavity of at least some antenna units in the i-th subarray to obtain the i-th optimized subarray, the grating lobe of the beam of the i-th optimized subarray is smaller than the grating lobe of the beam of the i-th subarray, and when i traverses 1 to K, a first antenna array is obtained; the electronic device optimizes the radiation structure of the resonant cavity of some antenna units in the first antenna array to obtain a second antenna array, and the grating lobe of the beam of the second antenna array is smaller than the grating lobe of the beam of the first antenna array.

[0065] Figure 6 The electronic device provided in the embodiment of the present invention is a schematic diagram of the structure of the electronic device. For example, the electronic device may be a terminal, or a chip (system) or other components or assemblies that can be set in the terminal. Figure 6 As shown, the electronic device 400 may include a processor 401. Optionally, the electronic device 400 may further include a memory 402 and / or a transceiver 403. The processor 401 is coupled with the memory 402 and the transceiver 403, such as being connected via a communication bus.

[0066] Combine the following Figure 6 The components of the electronic device 400 are described in detail:

[0067] The processor 401 is the control center of the electronic device 400, and may be a processor or a general term for multiple processing elements. For example, the processor 401 is one or more central processing units (CPUs), or may be application specific integrated circuits (ASICs), or may be one or more integrated circuits configured to implement the embodiments of the present invention, such as one or more microprocessors (digital signal processors, DSPs), or one or more field programmable gate arrays (FPGAs).

[0068] Optionally, the processor 401 can execute various functions of the electronic device 400 by running or executing the software program stored in the memory 402 and calling the data stored in the memory 402, such as executing the above Figure 2 The array antenna resonant cavity radiation structure shaping optimization method is shown.

[0069] In a specific implementation, as an embodiment, the processor 401 may include one or more CPUs, such as Figure 6 CPU0 and CPU1 are shown in FIG.

[0070] In a specific implementation, as an embodiment, the electronic device 400 may also include multiple processors. Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor here may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0071] The memory 402 is used to store the software program for executing the solution of the present invention, and the execution is controlled by the processor 401. The specific implementation method can refer to the above method embodiment, which will not be repeated here.

[0072] Optionally, the memory 402 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 402 may be integrated with the processor 401, or may exist independently and access the computer through the interface circuit ( Figure 6 (not shown) is coupled to the processor 401, which is not specifically limited in this embodiment of the present invention.

[0073] The transceiver 403 is used for communication with other electronic devices. For example, if the electronic device 400 is a terminal, the transceiver 403 can be used to communicate with a network device, or with another terminal device. For another example, if the electronic device 400 is a network device, the transceiver 403 can be used to communicate with a terminal, or with another network device.

[0074] Optionally, the transceiver 403 may include a receiver and a transmitter ( Figure 6 The receiver is used to implement a receiving function, and the transmitter is used to implement a sending function.

[0075] Optionally, the transceiver 403 may be integrated with the processor 401, or may exist independently and communicate with the electronic device 400 through an interface circuit ( Figure 6 (not shown) is coupled to the processor 401, which is not specifically limited in this embodiment of the present invention.

[0076] Understandably, Figure 6 The structure of the electronic device 400 shown in the figure does not constitute a limitation on the electronic device, and the actual electronic device may include more or fewer components than those shown in the figure, or combine certain components, or arrange the components differently.

[0077] In addition, the technical effects of the electronic device 400 can refer to the technical effects of the methods described in the above method embodiments, which will not be repeated here.

[0078] It should be understood that the processor in the embodiment of the present invention may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0079] It should also be understood that the memory in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0080] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. When implemented by software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0081] It should be understood that the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship, but it may also indicate an "and / or" relationship. Please refer to the context for specific understanding.

[0082] In the present invention, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0083] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0084] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0085] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0086] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0087] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0088] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0089] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0090] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for optimizing the formation of a radiation structure of an array antenna resonant cavity, characterized in that: Applied to electronic equipment, the method comprises: The electronic device obtains an initial antenna array, where the initial antenna array is a matrix antenna array including M*N antenna units, where M is the number of rows of the matrix, N is the number of columns of the matrix, M and N are both integers greater than 1, and each of the M*N antenna units is an antenna unit of a resonant cavity structure; The electronic device evenly divides the initial antenna array into K sub-arrays, where K is an integer greater than 1; For an i-th subarray among the K subarrays, the electronic device optimizes the radiation structure of the resonant cavity of at least part of the antenna units in the i-th subarray to obtain an i-th optimized subarray, wherein the grating lobe of the beam of the i-th optimized subarray is smaller than the grating lobe of the beam of the i-th subarray, and when i traverses from 1 to K, a first antenna array is obtained; The electronic device optimizes the radiation structure of the resonant cavity of some antenna units in the first antenna array to obtain a second antenna array, wherein the grating lobe of the beam of the second antenna array is smaller than the grating lobe of the beam of the first antenna array.

2. The method according to claim 1, characterized in that Each antenna unit is a hexahedral rectangular structure, a first slot is provided on a first surface of the rectangular structure, the first slot is parallel to a first side where a second surface of the rectangular structure intersects with the first surface, the first slot and an internal cavity of the rectangular structure form a resonant cavity structure, a third surface of the rectangular structure intersecting with the first surface and parallel to the second surface is provided with a feeding portion, a second side between the second surface and the third surface is perpendicular to the first slot, and the electronic device optimizing the radiation structure of the resonant cavity of the antenna unit means that the electronic device adjusts the length of the second side of the antenna unit.

3. The method according to claim 2, characterized in that The i-th subarray is a matrix subarray including 2*2 antenna units, and the electronic device optimizes the radiation structure of the resonant cavity of at least part of the antenna units in the i-th subarray to obtain the i-th optimized subarray, including: The electronic device sets the structure of the target antenna unit in the i-th subarray so that the second side has a maximum length within a preset length range, and when the second side of the target antenna unit is set to the maximum length, the signal radiation range of the target antenna unit is the largest; The electronic device combines the structure of the target antenna unit with the structures of the second sides of at least two antenna units at different lengths to obtain a plurality of preselected subarrays; the at least two antenna units are antenna units other than the target antenna unit in the i-th subarray, and the different lengths of the second side of any one of the at least two antenna units are all lengths of the preset length range; The electronic device simulates a first beam pattern of each pre-selected sub-array of the plurality of pre-selected sub-arrays to obtain a plurality of first beam patterns in total; The electronic device determines a first beam pattern with a minimum average grating lobe among the multiple first beam patterns, and determines a preselected subarray corresponding to the first beam pattern with the minimum average grating lobe as the i-th optimized subarray.

4. The method according to claim 3, characterized in that When M=2 and N=4, the initial antenna array is a 2*4 matrix antenna array, when K=2, the K subarrays are 2 subarrays, the first subarray of the 2 subarrays is a 2*2 matrix antenna array consisting of the first 2 columns and 2 rows of the 2*4 matrix antenna array, the second subarray of the 2 subarrays is a 2*2 matrix antenna array consisting of the last 2 columns and 2 rows of the 2*4 matrix antenna array, when i=1, the target antenna unit in the i-th subarray is the 2 antenna units located on the 1st column of the i-th subarray, and when i=2, the target antenna unit in the i-th subarray is the 2 antenna units located on the 2nd column of the i-th subarray.

5. The method according to claim 4, characterized in that Some of the antenna units in the first antenna array are two antenna units other than the target antenna unit, and the first antenna array other than the two antenna units are the remaining six antenna units; The electronic device optimizes the radiation structure of the resonant cavity of some antenna units in the first antenna array to obtain a second antenna array, including: The electronic device combines the structures of the six antenna units with the structures of the second sides of the two antenna units at different lengths to obtain a plurality of preselected antenna arrays; the structures of the six antenna units refer to the structures in the first antenna array; the different lengths of the second sides of any one of the two antenna units are all lengths of the preset length range; The electronic device simulates the second beam pattern of each preselected antenna array of the plurality of preselected antenna arrays to obtain a plurality of second beam patterns in total; The electronic device determines a second beam pattern with a minimum average grating lobe among the multiple second beam patterns, and determines a preselected antenna array corresponding to the second beam pattern with the minimum average grating lobe as the second antenna array.

6. The method according to claim 4, characterized in that The two antenna units include: the antenna unit located in the 3rd column and the 1st row of the 2*4 matrix antenna array, and the antenna unit located in the 4th column and the 2nd row of the 2*4 matrix antenna array, or; the two antenna units include: the antenna unit located in the 3rd column and the 2nd row of the 2*4 matrix antenna array, and the antenna unit located in the 4th column and the 1st row of the 2*4 matrix antenna array.

7. The method according to claim 3, characterized in that When M=4 and N=4, the initial antenna array is a 4*4 matrix antenna array. When K=4, the K subarrays are 4 subarrays. The first subarray of the 4 subarrays is a 2*2 matrix antenna array consisting of the first 2 columns and the first 2 rows of the 4*4 matrix antenna array. The second subarray of the 4 subarrays is a 2*2 matrix antenna array consisting of the last 2 columns and the first 2 rows of the 4*4 matrix antenna array. The third subarray of the 4 subarrays is a 2*2 matrix antenna array consisting of the first 2 columns and the last 2 rows of the 4*4 matrix antenna array. The fourth subarray of the 4 subarrays is a 2*2 matrix antenna array consisting of the first 2 columns and the last 2 rows of the 4*4 matrix antenna array. A 2*2 matrix antenna array composed of the last two columns and the last two rows in a column, when i=1, the target antenna unit in the ith subarray is the antenna unit located on the first column and the first row in the ith subarray, when i=2, the target antenna unit in the ith subarray is the antenna unit located on the second column and the first row in the ith subarray, when i=3, the target antenna unit in the ith subarray is the antenna unit located on the first column and the second row in the ith subarray, and when i=4, the target antenna unit in the ith subarray is the antenna unit located on the second column and the second row in the ith subarray.

8. The method according to claim 7, characterized in that Some of the antenna units in the first antenna array are four antenna units other than the target antenna unit, and the first antenna array other than the four antenna units are the remaining 12 antenna units; The electronic device optimizes the radiation structure of the resonant cavity of some antenna units in the first antenna array to obtain a second antenna array, including: The electronic device combines the structures of the 12 antenna units with the structures of the second sides of the four antenna units at different lengths to obtain a plurality of preselected antenna arrays; the structures of the 12 antenna units refer to the structures in the first antenna array; the different lengths of the second sides of any one of the four antenna units are all lengths of the preset length range; The electronic device simulates the second beam pattern of each preselected antenna array of the plurality of preselected antenna arrays to obtain a plurality of second beam patterns in total; The electronic device determines a second beam pattern with a minimum average grating lobe among the multiple second beam patterns, and determines a preselected antenna array corresponding to the second beam pattern with the minimum average grating lobe as the second antenna array.

9. The method according to claim 8, characterized in that The four antenna units include: the antenna unit located in the 2nd column and the 2nd row of the 4*4 matrix antenna array, the antenna unit located in the 3rd column and the 2nd row of the 4*4 matrix antenna array, the antenna unit located in the 2nd column and the 3rd row of the 4*4 matrix antenna array, and the antenna unit located in the 3rd column and the 3rd row of the 4*4 matrix antenna array.

10. An array antenna resonant cavity radiation structure shaping optimization system, characterized in that: The system comprises an electronic device, wherein the system is configured to: The electronic device obtains an initial antenna array, where the initial antenna array is a matrix antenna array including M*N antenna units, where M is the number of rows of the matrix, N is the number of columns of the matrix, M and N are both integers greater than 1, and each of the M*N antenna units is an antenna unit of a resonant cavity structure; The electronic device evenly divides the initial antenna array into K sub-arrays, where K is an integer greater than 1; For an i-th subarray among the K subarrays, the electronic device optimizes the radiation structure of the resonant cavity of at least part of the antenna units in the i-th subarray to obtain an i-th optimized subarray, wherein the grating lobe of the beam of the i-th optimized subarray is smaller than the grating lobe of the beam of the i-th subarray, and when i traverses from 1 to K, a first antenna array is obtained; The electronic device optimizes the radiation structure of the resonant cavity of some antenna units in the first antenna array to obtain a second antenna array, wherein the grating lobe of the beam of the second antenna array is smaller than the grating lobe of the beam of the first antenna array.

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