A large-scale array decoupling device based on cell partition and star topology

Abstract

The application relates to the technical field of antenna array decoupling, in particular to a large-scale array decoupling device based on cell partition and star topology. The scheme comprises: a plurality of cell partition units, which are used for dividing a large-scale antenna array into a plurality of independent local subarrays; and a star decoupling structure matched with each cell partition unit; wherein the star decoupling structure is independently arranged in the corresponding cell partition unit, and comprises a common central node and a plurality of independent branches; one end of each independent branch is connected to the common central node; the other end of each independent branch is used for connecting each antenna array element in the same cell; a decoupling unit is arranged on each independent branch, and the decoupling unit is used for canceling the electromagnetic mutual coupling between any two antenna array elements in the same cell, thereby significantly reducing the decoupling design and processing complexity of the large-scale array. The application is suitable for antenna array decoupling.

Description

Technical Field

[0001] This invention relates to the field of antenna array decoupling technology, specifically to a large-scale array decoupling device based on cell partitioning and star topology. Background Technology

[0002] Massive MIMO is a core physical layer technology in 5G / 6G. The ever-increasing demand for mobile communication and the scarcity of global bandwidth resources constitute the dual driving forces propelling its evolution. Further increasing the number of antennas in MIMO systems is one of the key directions for breakthroughs in 5G / 6G technology. However, due to space constraints, the close arrangement of antenna elements can lead to significant mutual coupling effects. Linear arrays with element spacing smaller than... Significant coupling may occur at this time. Indicates the wavelength of electromagnetic waves; rectangular arrays with spacing less than Time coupling is enhanced; triangular arrays with spacing less than Significant coupling can also occur. Coupling leads to a decrease in the array's radiation performance and matching characteristics. In severe cases, excessive coupling power can also adversely affect the stability and reliability of RF front-end devices.

[0003] Currently, there are few decoupling networks for large-scale dense arrays, mainly due to the variety of coupling coefficients and element environments in omnidirectional arrays. The main challenges for decoupling matching networks resulting from this are:

[0004] First, there are issues with the feeder being too thin and the coupling between feeders.

[0005] Second, there are issues such as wire wrapping and jumpers in cross-decoupling networks.

[0006] Third, the array elements are severely mismatched. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a large-scale array decoupling device based on cell partitioning and star topology, which solves the technical problems of complex wiring, diagonal crossing, multi-path power splitting, single structural form, limited installation position, and poor versatility of existing large-scale antenna array decoupling topologies.

[0008] The present invention achieves the above objectives by adopting the following technical solution: The present invention provides a large-scale array decoupling device based on cell partitioning and star topology, comprising:

[0009] Multiple cell partitioning units are used to divide a large-scale antenna array into several independent local subarrays;

[0010] And a star-shaped decoupling structure that corresponds one-to-one with each of the aforementioned cell partitioning units;

[0011] The star-shaped decoupling structure is independently arranged inside the corresponding cell partition unit. It includes a common central node and multiple independent branches. One end of each independent branch is connected to the common central node, and the other end of each independent branch is used to connect to each antenna array element in the same cell.

[0012] Each of the independent branches is equipped with a decoupling unit, which is used to cancel the electromagnetic mutual coupling between any two array elements within the same cell.

[0013] Furthermore, each of the aforementioned cell partitioning units is independent of each other, and each completes the decoupling process of its internal array elements independently, without the need for global coupling solution of the entire array.

[0014] Furthermore, the star-shaped decoupling structure is used to equivalently replace the traditional fully connected decoupling configuration inside the cell with a star-shaped topology, so as to avoid the problems of line crossing, multi-path power splitting and structural stacking caused by connecting diagonal array elements in the traditional fully connected topology.

[0015] Furthermore, the included coupling unit is a passive electromagnetic structure that realizes electromagnetic mutual coupling cancellation of antenna array elements, and its structural form includes, but is not limited to, circuit-type decoupling structure, surface decoupling structure or spatial decoupling structure.

[0016] Furthermore, the arrangement of the star-shaped decoupling structure includes, but is not limited to, one side of the antenna feed port, above the antenna array elements, between array elements, and the surface or bottom feed area of ​​the array.

[0017] Furthermore, the decoupling unit is a two-stage broadband decoupling network;

[0018] The first-stage decoupling network is used to eliminate the imaginary part of the antenna mutual coupling admittance over a wide bandwidth by utilizing vector fitting and the Brune equivalent network method.

[0019] The second-stage decoupling network is a parallel resistor, used to eliminate the real part of the antenna mutual coupling admittance over a wide bandwidth.

[0020] Its cancellation principle is characterized by the following formula:

[0021] ;

[0022] In the formula, express port and The resistance value of the parallel resistor at the port. This represents the initiation point admittance of the decoupled network, i.e., the self-admittance of the decoupled network as seen from port i. This represents the antenna mutual coupling admittance, i.e., the coupling admittance from port j to port i.

[0023] Furthermore, when the cell partitioning unit is a rectangular cell:

[0024] For internal cells, the fully connected decoupled network is completely equivalent to an X-shaped star network;

[0025] For edge cells or corner cells, their fully connected decoupled network is approximately equivalent to an X-shaped star network;

[0026] For cells inside a rectangle, the equivalent mechanism is:

[0027] , ;

[0028] , ;

[0029] In the formula, In a rectangular fully connected decoupled network, the first... Self-admittance of each port, In a rectangular star decoupling network, the first... Self-admittance of each port, Indicates the first The port is for the first Mutual admittance of each port, represents the basic admittance parameter, and represents the series admittance value of each independent branch in the star network.

[0030] Furthermore, when the cell partitioning unit is a triangular cell:

[0031] For internal cells, the fully connected decoupled network is completely equivalent to a Y-shaped star network;

[0032] For edge cells or corner cells, the fully connected decoupled network is approximately equivalent to a Y-shaped star network;

[0033] For the internal cells of a triangle, the equivalent mechanism is:

[0034] , ;

[0035] , ;

[0036] In the formula, In a triangular fully connected decoupled network, the first... Self-admittance of each port, In a triangle-star decoupling network, the first... Self-admittance of each port, In a triangle-star decoupling network, the first... The port is for the first Mutual admittance of each port, represents the basic admittance parameter, and represents the series admittance value of each independent branch in the star network.

[0037] Furthermore, when the cell partitioning unit is a parallelogram cell:

[0038] For internal cells, the fully connected decoupled network is approximately equivalent to an X-shaped star network;

[0039] For edge cells or corner cells, their fully connected decoupled network is approximately equivalent to an X-shaped star network;

[0040] For the interior cells of a parallelogram, the approximate equivalent mechanism is as follows:

[0041] , ;

[0042] , , ;

[0043] , , ;

[0044] , , ;

[0045] In the formula, In a parallelogram fully connected decoupled network, the first... Self-admittance of each port, In a parallelogram star decoupling network, the first... Self-admittance of each port, In a fully connected network, the first... The port is for the first Mutual admittance of each port, In a star network, the first The port is for the first Mutual admittance of each port, This represents the fundamental admittance parameter.

[0046] Furthermore, for array edge cells caused by array truncation effect, their decoupling structure is retained as a fully connected structure, or extended and matched by introducing virtual elements in combination with the star-shaped decoupling structure.

[0047] The beneficial effects of this invention are as follows:

[0048] This invention adopts a cell partitioning independent decoupling architecture, which decomposes the large-scale array coupling problem into multiple local subarray coupling problems, reduces the dimensionality of multi-element coupling solutions, and greatly simplifies the decoupling design difficulty of large-scale MIMO arrays.

[0049] This invention uses a star topology to replace the traditional fully connected topology, which completely solves the problems of diagonal array element wiring cross, structural stacking, and high redundancy in traditional fully connected networks. The structure is simple, highly regular, and easy to process and integrate.

[0050] The decoupling unit structure of this invention is completely open and is not limited to conventional circuit structures. It is compatible with all passive decoupling forms such as resonant structures, microstrip structures, decoupling surfaces, and spatial decoupling, and has a very wide range of applications.

[0051] The installation location of this invention is not limited and can be placed on top of array elements, in gaps, at the feed end, or anywhere else. It breaks through the single form of traditional port decoupling and is adaptable to different antenna array structures and packaging scenarios.

[0052] This invention can achieve mutual coupling cancellation between any two array elements within a cell, effectively improving the isolation of the antenna array port and ensuring the array radiation performance and channel transmission stability. Attached Figure Description

[0053] Figure 1 This is a schematic diagram of a rectangular cell structure provided in an embodiment of the present invention;

[0054] Figure 2 This is a schematic diagram of the parallelogram cell structure provided in an embodiment of the present invention;

[0055] Figure 3 This is a schematic diagram of the triangular cell structure provided in an embodiment of the present invention;

[0056] Figure 4 This is a schematic diagram of a single-cell star structure provided in an embodiment of the present invention;

[0057] Figure 5 This is a schematic diagram showing the complete equivalence and comparison between the fully connected network and the star network of the internal cells of the rectangular array provided in the embodiment of the present invention. The left side is the fully connected network and the right side is the star network.

[0058] Figure 6 This is a schematic diagram showing the approximate equivalence and comparison between a fully connected network and a star network of rectangular array corner cells provided in an embodiment of the present invention. The left side is the fully connected network, and the right side is the star network.

[0059] Figure 7 This is a schematic diagram showing the approximate equivalence and comparison between a fully connected network and a star network of rectangular array edge cells provided in an embodiment of the present invention. The left side is the fully connected network, and the right side is the star network.

[0060] Figure 8 This is a schematic diagram showing the complete equivalence and comparison between the fully connected network and the star network of the internal cells of the triangular array provided in the embodiment of the present invention. The left side is the fully connected network and the right side is the star network.

[0061] Figure 9 This is a schematic diagram showing the approximate equivalence and comparison between the fully connected network and the star network of the internal cells of the parallelogram array provided in the embodiments of the present invention. The left side is the fully connected network, and the right side is the star network.

[0062] Figure 10 This is a schematic diagram of the star-shaped decoupling structure provided in the embodiment of the present invention, which is suspended above the array elements or arranged on the surface.

[0063] Figure 11 This is a schematic diagram of the star-shaped decoupling structure provided in the embodiment of the present invention being arranged at the gap between array elements;

[0064] Figure 12 This is a schematic diagram of the star-shaped decoupling structure provided in this embodiment of the invention being deployed on the power supply port side;

[0065] Figure 13 This is an application of the 3×3 rectangular cylindrical monopole antenna array deployment provided in the embodiments of the present invention;

[0066] Figure 14 This is an application of the 4×4 triangular cylindrical monopole antenna array deployment provided in the embodiments of the present invention;

[0067] Figure 15 This is another deployment application of the 4×4 triangular cylindrical monopole antenna array provided in the embodiments of the present invention;

[0068] In the attached diagram, 1 represents a corner cell, 2 represents an edge cell, 3 represents an internal cell, 4 represents an array element, 5 represents a fully connected network, 6 represents a branch of a star-decoupled structure, and 7 represents the central node of a star-decoupled structure. Detailed Implementation

[0069] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0070] This invention does not limit the array size or array manifold, and can be adapted to multi-element MIMO antenna arrays of any size and arrangement. This solution exemplarily uses a 3×3 rectangular antenna array and a 4×4 triangular antenna array as application carriers, which can be referred to... Figures 1 to 3The partitioning approach shown is to divide the array into rectangular cell structures, triangular cell structures, and parallelogram cell structures. Each cell structure contains corner cells 1, edge cells 2, and internal cells 3. Each cell structure is divided according to the position and environment of the array elements 4. The array edge decoupling network still exists in the form of a fully connected network 5.

[0071] This invention divides the entire antenna array into several independent cell partitions according to actual design requirements. The partitioning style and specifications are not subject to fixed constraints; only that each cell partition contains at least two antenna elements. Each cell partition is independent of the others and independently completes the decoupling and control of its internal elements. There is no need to perform unified calculations to solve for the coupling relationship of the entire array, which greatly reduces the design complexity of large-scale arrays.

[0072] In one embodiment of the present invention, the rectangular array partitioning method is as follows: Figures 5 to 7 As shown, without virtual elements, there are three types of rectangular cells: corner cells, edge cells, and interior cells; with virtual elements, there is only one type of rectangular cell, namely the interior cell. The equivalents and comparisons of fully connected networks and star topologies for corner cells, edge cells, and interior cells of a rectangular array are shown below. Figures 5 to 7 As shown.

[0073] In one embodiment of the present invention, the partitioning method of the triangular cells of the triangular array can be as follows: Figure 8 As shown, without dummy elements, there are seven types of triangular cells: two types of corner cells, four types of edge cells, and one type of interior cell; with dummy elements, there is only one type of triangular cell, namely the interior cell. The fully connected network of a triangular array of cells is completely equivalent to and comparable to a star network. Figure 8 As shown, the left side represents a fully connected network, and the right side represents a star network.

[0074] In one embodiment of the present invention, the parallelogram cells of the triangular array are partitioned as follows: Figure 9 As shown, if there are no virtual elements, there are five types of parallelogram cells: two types of corner cells, two types of edge cells, and one type of interior cell; if there are virtual elements, there is only one type of parallelogram cell, namely the interior cell.

[0075] For each of the partitioned cells, an independent star-shaped decoupling structure is deployed. For specific structural details, please refer to [reference needed]. Figure 4Each star-shaped decoupling structure has a common central node 7. From the common central node 7 extend star-shaped decoupling branch lines 6, the number of which corresponds to the number of array elements within the partition. Each branch connects to the corresponding antenna array element within the cell. Each branch is equipped with a decoupling unit. The decoupling unit can be any structure capable of achieving electromagnetic mutual coupling cancellation, and can take any form such as conventional circuit elements, resonant structures, decoupling surfaces, or spatial decoupling structures. Alternatively, the two-stage broadband decoupling configuration proposed in this invention can be used. Relying on the multi-port matching characteristics of the star topology itself, the electromagnetic coupling between any two sets of array elements within the same cell can be effectively canceled, improving the array element port isolation performance.

[0076] In one embodiment of the present invention, the decoupling unit may employ a two-stage broadband decoupling network:

[0077] Level 1: Using vector fitting and the Brune equivalent network method to eliminate the imaginary part of the mutual coupling admittance over a wide bandwidth;

[0078] The second stage involves parallel resistors to eliminate the real part of the mutual coupling admittance over a wide bandwidth.

[0079] Its cancellation principle is characterized by the following formula:

[0080] ;

[0081] In the formula, express port and The resistance value of the parallel resistor at the port. This represents the initiation point admittance of the decoupled network, i.e., the self-admittance of the decoupled network as seen from port i. This represents the antenna mutual coupling admittance, i.e., the coupling admittance from port j to port i.

[0082] Reference Figures 5 to 7 As shown in the structural equivalent relationship, this scheme replaces the traditional fully connected decoupling form within the cell with a star-shaped arrangement. By using the layout of central nodes to centrally gather branches, the drawbacks of the original structure, such as line crossings between diagonal array elements, component stacking, and multiple power distributions caused by one array element connecting multiple decoupling structures, are completely avoided. The overall structure is more regular and easier to process, assemble, and integrate.

[0083] Specifically, a rectangular cell can be represented by its internal cells, edge cells, and corner cells, respectively, as an equivalent "X"-shaped star structure. For example... Figures 5 to 7 As shown. Since some fully connected structures are shared by two cells, these fully connected networks need to be equivalent to two identical parallel structures so that the two parallel structures belong to two separate cells.

[0084] For cells inside a rectangle, the equivalent mechanism is:

[0085] , ;

[0086] , ;

[0087] In the formula, In a rectangular fully connected decoupled network, the first... Self-admittance of each port, In a rectangular star decoupling network, the first... Self-admittance of each port, Indicates the first The port is for the first Mutual admittance of each port, represents the basic admittance parameter, and represents the series admittance value of each independent branch in the star network.

[0088] In particular, there are three array element environments and four coupling cases in the rectangular corner cell. In order not to destroy the symmetry of the array, there can only be three different admittance values ​​(A, B, C) corresponding to the star structure. Therefore, theoretically there are at most three equivalent decoupling structures. In practice, the fourth coupling case may be solved by simulation software optimization.

[0089] In particular, there are two array element environments and three coupling cases for rectangular edge cells. In order not to destroy the symmetry of the array, there can only be two different admittance values ​​(D, E) for the star structure. Therefore, theoretically there are at most two equivalent decoupling structures. In practice, the third coupling case may be solved by simulation software optimization.

[0090] Specifically, the triangular cell can be represented by the internal cell, edge cell, and corner cell, respectively, as equivalent to the corresponding "Y"-shaped star structure, such as... Figure 8 As shown. For the internal cells of a triangle, the equivalent mechanism is:

[0091] , ;

[0092] , ;

[0093] In the formula, In a triangular fully connected decoupled network, the first... Self-admittance of each port, In a triangle-star decoupling network, the first... Self-admittance of each port, In a triangle-star decoupling network, the first... The port is for the first Mutual admittance of each port, represents the basic admittance parameter, and represents the series admittance value of each independent branch in the star network.

[0094] In particular, the triangular corner cells and the triangular side cells can be approximated by referring to the rectangular cells.

[0095] In particular, due to the array truncation effect, the array edge decoupling structure still exists in the form of a fully connected structure or is combined with virtual elements to extend the triangular star structure.

[0096] Specifically, the parallelogram cell can be approximated as a corresponding "X"-shaped star structure by dividing the fully connected network into internal cells, edge cells, and corner cells, respectively. Figure 9 As shown. For the internal cells of a parallelogram, its approximate equivalent mechanism is:

[0097] , ;

[0098] , , ;

[0099] , , ;

[0100] , , ;

[0101] In the formula, In a parallelogram fully connected decoupled network, the first... Self-admittance of each port, In a parallelogram star decoupling network, the first... Self-admittance of each port, In a fully connected network, the first... The port is for the first Mutual admittance of each port, In a star network, the first The port is for the first Mutual admittance of each port, This represents the fundamental admittance parameter.

[0102] In particular, the corner cells of parallelograms and the side cells of triangles can be approximated by referring to the rectangular cells.

[0103] In particular, due to the array truncation effect, the array edge decoupling network still exists in the form of a fully connected structure or is combined with virtual elements to extend the parallelogram star structure.

[0104] The installation location of the star-shaped decoupling structure is highly flexible, and the layout can be as follows:Figures 10 to 12 As shown. The structure is not limited to the antenna feed port side. It can be flexibly placed above the antenna elements, between the elements, on the array surface, or in any area that can act on the coupling field of the elements, depending on the actual assembly space and electromagnetic control requirements of the array. It is suitable for various antenna packaging and overall installation scenarios.

[0105] like Figures 13 to 15 As shown, a rectangular cylindrical monopole antenna array and a 4×4 triangular cylindrical monopole antenna array are used as examples for practical deployment. According to a custom partitioning rule, the 3×3 rectangular array is divided into four square subarrays, and the 4×4 triangular array is divided into nine triangular subarrays or five parallelogram matrix subarrays. Each cell subarray is an independent local subarray, and decoupling is independently implemented between cells. Each cell subarray is configured with an independent star-shaped decoupling structure, which includes a common central node and 3 or 4 independent branches. These 3 or 4 branches connect to 3 or 4 antenna elements within the cell. Each branch is configured with a two-stage broadband decoupling network. Through the multi-port electromagnetic matching characteristics of the star structure, near-field electromagnetic coupling between any two elements within the same cell is canceled.

[0106] After the overall structure is assembled, the antenna array is subjected to performance simulation. Compared with an array without decoupling measures, the structure of this invention can significantly suppress interference coupling between array elements, stabilize the antenna radiation direction characteristics, and broaden the effective operating bandwidth, meeting the practical application requirements of 6G communication massive MIMO antenna arrays.

[0107] In this embodiment, the decoupling unit can be flexibly selected according to actual needs. It can be a circuit structure such as a capacitor, inductor, or resonant stub, or a decoupling surface structure covering the array element, an array element gap space decoupling structure, etc. The structural form is not limited.

[0108] Meanwhile, the installation location of the star-shaped decoupling structure is not limited and can be flexibly adapted to different array structures and installation scenarios, including but not limited to the antenna feed port side, directly above the array elements, in the lateral gaps between array elements, on the surface of the array medium, or any other location that can achieve mutual coupling electromagnetic field control between array elements, adapting to various array layouts and packaging forms.

[0109] Compared to traditional fully connected decoupling structures, this embodiment completely eliminates the wiring crossover problem of diagonal array elements through a star-shaped topology with a central convergence structure, resulting in a simpler and more regular structure. Simultaneously, the cell-independent decoupling mode significantly reduces the computational load and design complexity of multi-element coupling, and while ensuring array radiation efficiency and gain performance, it significantly improves the isolation of array element ports, achieving a broadband decoupling effect.

[0110] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A large-scale array decoupling device based on cell partitioning and star topology, characterized in that, include: Multiple cell partitioning units are used to divide a large-scale antenna array into several independent local subarrays; And a star-shaped decoupling structure that corresponds one-to-one with each of the aforementioned cell partitioning units; The star-shaped decoupling structure is independently arranged inside the corresponding cell partition unit. It includes a common central node and multiple independent branches. One end of each independent branch is connected to the common central node, and the other end of each independent branch is used to connect to each antenna array element in the same cell. Each of the independent branches is equipped with a decoupling unit, which is used to cancel the electromagnetic mutual coupling between any two array elements within the same cell.

2. The large-scale array decoupling device based on cell partitioning and star topology according to claim 1, characterized in that, Each of the aforementioned cell partitioning units is independent of each other, and each completes the decoupling process of its internal array elements independently, without the need for global coupling solution of the entire array.

3. The large-scale array decoupling device based on cell partitioning and star topology according to claim 1, characterized in that, The star-shaped decoupling structure is used to replace the traditional fully connected decoupling configuration inside the cell with a star-shaped topology, so as to avoid the problems of line crossing, multi-path power splitting and structural stacking caused by connecting diagonal array elements in the traditional fully connected topology.

4. The large-scale array decoupling device based on cell partitioning and star topology according to claim 1, characterized in that, The decoupling unit is a passive electromagnetic structure that cancels out electromagnetic mutual coupling between antenna array elements. Its structural forms include, but are not limited to, circuit-type decoupling structures, surface decoupling structures, or spatial decoupling structures.

5. The large-scale array decoupling device based on cell partitioning and star topology according to claim 1, characterized in that, The arrangement of the star-shaped decoupling structure includes, but is not limited to, one side of the antenna feed port, above the antenna array elements, between array elements, and the surface or bottom feed area of ​​the array.

6. The large-scale array decoupling device based on cell partitioning and star topology according to claim 1, characterized in that, The decoupling unit is a two-level broadband decoupling network; The first-stage decoupling network is used to eliminate the imaginary part of the antenna mutual coupling admittance over a wide bandwidth by utilizing vector fitting and the Brune equivalent network method. The second-stage decoupling network is a parallel resistor, used to eliminate the real part of the antenna mutual coupling admittance over a wide bandwidth. Its cancellation principle is characterized by the following formula: ； In the formula, express port and The resistance value of the parallel resistor at the port. This represents the initiation point admittance of the decoupled network, i.e., the self-admittance of the decoupled network as seen from port i. This represents the antenna mutual coupling admittance, i.e., the coupling admittance from port j to port i.

7. The large-scale array decoupling device based on cell partitioning and star topology according to claim 1, characterized in that, When the cell partitioning unit is a rectangular cell: For internal cells, the fully connected decoupled network is completely equivalent to an X-shaped star network; For edge cells or corner cells, their fully connected decoupled network is approximately equivalent to an X-shaped star network; For cells inside a rectangle, the equivalent mechanism is: ， ； ， ； In the formula, In a rectangular fully connected decoupled network, the first... Self-admittance of each port, In a rectangular star decoupling network, the first... Self-admittance of each port, Indicates the first The port is for the first Mutual admittance of each port, represents the basic admittance parameter, and represents the series admittance value of each independent branch in the star network.

8. The large-scale array decoupling device based on cell partitioning and star topology according to claim 1, characterized in that, When the cell partitioning unit is a triangular cell: For internal cells, the fully connected decoupled network is completely equivalent to a Y-shaped star network; For edge cells or corner cells, the fully connected decoupled network is approximately equivalent to a Y-shaped star network; For the internal cells of a triangle, the equivalent mechanism is: ， ； ， ； In the formula, In a triangular fully connected decoupled network, the first... Self-admittance of each port, In a triangle-star decoupling network, the first... Self-admittance of each port, In a triangle-star decoupling network, the first... The port is for the first Mutual admittance of each port, represents the basic admittance parameter, and represents the series admittance value of each independent branch in the star network.

9. The large-scale array decoupling device based on cell partitioning and star topology according to claim 1, characterized in that, When the cell partitioning unit is a parallelogram cell: For internal cells, the fully connected decoupled network is approximately equivalent to an X-shaped star network; For edge cells or corner cells, their fully connected decoupled network is approximately equivalent to an X-shaped star network; For the interior cells of a parallelogram, the approximate equivalent mechanism is as follows: ， ； ， ， ； ， ， ； ， ， ； In the formula, In a parallelogram fully connected decoupled network, the first... Self-admittance of each port, In a parallelogram star decoupling network, the first... Self-admittance of each port, In a fully connected network, the first... The port is for the first Mutual admittance of each port, In a star network, the first The port is for the first Mutual admittance of each port, This represents the fundamental admittance parameter.

10. The large-scale array decoupling device based on cell partitioning and star topology according to claim 1, characterized in that, For array edge cells caused by array truncation effect, their decoupling structure is retained as a fully connected structure, or extended and matched by introducing virtual elements in combination with the star-shaped decoupling structure.

Images