Integrated molded dielectric waveguide filter construction method and system based on multi-mode resonance mode fusion

Abstract

The application relates to the technical field of dielectric waveguide filters, in particular to a dielectric waveguide filter construction method and system based on multi-mode resonant mode fusion, which comprises the following steps: establishing a dielectric waveguide main body model according to the center frequency and bandwidth parameters of a target filter; constructing a plurality of resonant mode corresponding resonant regions in the dielectric waveguide main body, so that the plurality of resonant modes form electromagnetic field distributions in different regions respectively; and setting a mode convergence window at the intersection position of the plurality of resonant mode electromagnetic field distribution regions, wherein the mode convergence window is a local region in the dielectric waveguide main body, the equivalent dielectric constant of the mode convergence window is lower than that of the dielectric waveguide main body, and the mode convergence window serves as a unified energy exchange node of the plurality of resonant modes. In the application, the mode convergence window with a lower equivalent dielectric constant is set in the dielectric waveguide main body, a unified energy exchange node is established for the plurality of resonant modes, and natural overlap and controllable coupling of the fundamental mode and the high-order mode edge field are realized.

Description

Technical Field

[0001] This invention relates to a method and system for constructing an integrated molded dielectric waveguide filter based on multi-mode resonant mode fusion, belonging to the field of dielectric waveguide filter technology. Background Technology

[0002] Dielectric waveguide filters are widely used in mobile communication, satellite communication and radar systems due to their advantages such as high Q value, low loss and small size.

[0003] Traditional dielectric waveguide filters mainly employ the following two design approaches:

[0004] Single-mode resonator cascade structure: Multiple single-mode dielectric resonators are cascaded through coupling structures (such as windows, probes, metal diaphragms, etc.) to form a multi-order filter response;

[0005] Multimode resonator structure: It utilizes both the fundamental mode and higher-order modes within a dielectric waveguide body, and achieves a compact filtering response through inter-mode coupling.

[0006] However, existing dielectric waveguide filters lack a unified energy exchange node in multimode design, which makes it difficult to control the coupling between the fundamental mode and higher-order modes, the design is complex, and it is sensitive to manufacturing errors. Furthermore, the traditional separate assembly method further results in poor consistency and high loss. Therefore, it is urgent to improve the construction method of integrated molded dielectric waveguide filters based on multimode resonant mode fusion to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a method and system for constructing an integrated molded dielectric waveguide filter based on multimode resonant mode fusion. By introducing a mode convergence window with an equivalent dielectric constant lower than that of the main body, a controllable unified energy exchange node is established for multiple resonant modes. The mode fusion equalization coefficient and coupling stability are quantitatively optimized, and finally, the filter is manufactured synchronously using an integrated molding process to solve the problems of poor multimode coupling stability and low product consistency.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] Firstly, a method for constructing an integrated molded dielectric waveguide filter based on multi-mode resonant mode fusion is provided, including the following steps:

[0010] Establish the main body model of the dielectric waveguide based on the center frequency and bandwidth parameters of the target filter;

[0011] Multiple resonance regions corresponding to multiple resonance modes are constructed within the dielectric waveguide body, so that multiple resonance modes form electromagnetic field distributions in different regions respectively.

[0012] A mode convergence window is set at the intersection of the electromagnetic field distribution regions of multiple resonant modes. The mode convergence window is a local region within the dielectric waveguide body, and its equivalent dielectric constant is lower than that of the dielectric waveguide body. The mode convergence window serves as a unified energy exchange node for multiple resonant modes.

[0013] The edge electromagnetic fields of each resonant mode are extended to the mode convergence window, through which energy exchange and coupling fusion between modes are achieved;

[0014] The coupling strength between each resonant mode is controlled by adjusting the structural parameters of the convergence window of the target filter response adjustment mode.

[0015] The adjusted structure is integrally molded to obtain a dielectric waveguide filter.

[0016] Furthermore, the plurality of resonant modes include a fundamental mode and at least one higher-order mode, wherein the fundamental mode and the higher-order mode correspond to different electric field distribution regions, and the electric field tail of each mode covers the mode convergence window region.

[0017] Furthermore, the mode convergence window is set in the central region of the dielectric waveguide body or in the region where the electric field intensity of multiple resonant modes overlaps the most.

[0018] Furthermore, the mode convergence window is formed through a local cavity structure, a micropore array structure, a porous medium structure, or a low-density sintered structure.

[0019] Furthermore, the structural parameters of the mode convergence window include one or more of length, width, height, and equivalent dielectric constant, and the energy transfer efficiency between modes can be changed by adjusting the structural parameters.

[0020] Furthermore, the intermode coupling strength is increased by increasing the volume of the mode convergence window, and the intermode coupling strength is decreased by decreasing the volume of the mode convergence window; the mode conversion efficiency is improved by reducing the equivalent dielectric constant of the mode convergence window region.

[0021] Furthermore, during the adjustment of the mode convergence window structure parameters, the resonant frequency, quality factor, and mode coupling coefficient corresponding to each resonant mode are obtained, and the mode convergence window structure is iteratively optimized based on the resonant frequency, quality factor, and mode coupling coefficient to obtain the preset filtering response.

[0022] Furthermore, the integrated molding process employs any one of ceramic injection molding, dry pressing, gel casting, or additive manufacturing to form the integral dielectric waveguide body, and simultaneously forms the multiple resonant regions and mode convergence windows through a single sintering process.

[0023] Secondly, an integrated molding dielectric waveguide filter construction system based on multi-mode resonant mode fusion is provided, including a modeling module for establishing a three-dimensional model of the dielectric waveguide body according to the target filtering parameters.

[0024] The field distribution generation module is used to generate electromagnetic field distributions of multiple resonant modes within the dielectric waveguide body.

[0025] The convergence window setting module is used to set a mode convergence window with an equivalent dielectric constant lower than that of the dielectric waveguide body at the intersection of multiple resonant mode electromagnetic field distribution regions.

[0026] The optimization module is used to iteratively adjust the structural parameters of the mode convergence window with the mode fusion equilibrium coefficient and coupling stability as optimization objectives.

[0027] The molding control module is used to output the optimized overall model and control the integrated molding process.

[0028] Thirdly, an electronic device is provided, comprising: a processor and a memory, the processor being connected to the memory, the memory being used to store a computer program, and the processor being used to execute the computer program stored in the memory to cause the electronic device to perform the method as described in the first aspect.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] This invention establishes a unified energy exchange node for multiple resonant modes by setting a mode convergence window with a lower equivalent dielectric constant within the dielectric waveguide body, achieving natural overlap and controllable coupling of the edge electric fields of the fundamental mode and higher-order modes. Simultaneously, based on the quantitative evaluation and iterative optimization of the mode fusion equalization coefficient and coupling stability, the coupling strength between each mode can be precisely adjusted to match the target filter response. Combined with the integrated molding process to simultaneously form the resonant region and the mode convergence window, subsequent assembly errors and additional losses are avoided, significantly improving the consistency, stability, and design efficiency of the filter performance. Attached Figure Description

[0031] Figure 1 This is a flowchart of the integrated molded dielectric waveguide filter construction method based on multi-mode resonant mode fusion of the present invention;

[0032] Figure 2 This is a system block diagram of the integrated molded dielectric waveguide filter construction system based on multi-mode resonant mode fusion of the present invention. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figures 1-2 As shown, the integrated molded dielectric waveguide filter construction method based on multi-mode resonant mode fusion provided in this embodiment includes the following steps:

[0035] Step 1: Determine the target filtering parameters

[0036] The target performance parameters of the filter are determined according to the working requirements of the communication system, including the target center frequency, target passband bandwidth, target insertion loss, and target return loss; an initial three-dimensional model of the dielectric waveguide body is established, and the positions of the input feed port and the output feed port are determined, providing a basic model for subsequent resonant mode analysis;

[0037] Step 2: Establishment of the multimode resonant region

[0038] Multiple resonant regions are established inside the dielectric waveguide body, so that multiple resonant modes are formed at different spatial locations. The electric field distribution corresponding to each resonant mode is obtained using electromagnetic simulation tools, and the resonant frequency and quality factor parameters of each mode are extracted. By analyzing the spatial distribution characteristics of the electric field energy of each mode, the main energy concentration area and energy diffusion area of ​​the mode are determined, providing a basis for subsequent identification of the mode convergence window position.

[0039] For the i-th resonant mode, its spatial electric field intensity is expressed as: ,in Indicates the spatial coordinates of the i-th resonant mode. The electric field strength at that location;

[0040] Step 3: Pattern Convergence Region Identification

[0041] After obtaining the electric field distribution results for all modes, a superposition analysis of the electric field intensity of each mode is performed to identify the energy overlap region jointly covered by multiple modes; the mode overlap coefficient is defined as:

[0042] ;

[0043] In the formula, This represents the pattern overlap coefficient at a spatial location. This represents the total number of resonant modes participating in the fusion.

[0044] Then determine the center position of the pattern convergence window: ;

[0045] In the formula, Indicates the center position of the mode convergence window. This indicates the coordinates of the position corresponding to the obtained maximum value;

[0046] Step 4: Constructing the Schema Convergence Window

[0047] A low dielectric constant region is constructed at the center of the mode convergence window, allowing the edge electric fields of multiple resonant modes to enter this region and exchange energy. The mode convergence window is formed using a micro-hole array structure, a local cavity structure, or a low-density sintered structure. The equivalent dielectric constant of this region is... The dielectric constant is lower than that of the bulk dielectric waveguide. ,satisfy < Electromagnetic energy undergoes a concentration and redistribution process in this region, thereby establishing a mode indirect coupling path.

[0048] Step 5: Calculation of Pattern Fusion

[0049] After the model convergence window is formed, the energy proportion occupied by each model within the model convergence window region is calculated. The energy proportion of the i-th model in the model convergence window is expressed as: ;

[0050] in, This represents the electromagnetic energy of the i-th mode in the mode convergence window;

[0051] The average energy percentage of the model is: ;

[0052] The mode fusion equilibrium coefficient is defined as: ;

[0053] The closer a value is to 1, the more balanced the energy distribution of multiple modes within the convergence window, and the better the fusion effect.

[0054] Step 6: Calculation of Coupling Stability

[0055] The deviation between the actual coupling coefficient and the target coupling coefficient is compared to evaluate the control capability of the mode convergence window over the coupling relationship; the coupling deviation is defined as:

[0056] ;

[0057] In the formula, This represents the actual coupling coefficient between pattern i and pattern j. Represents the target coupling coefficient; when =0 is defined =0;

[0058] Coupling stability is defined as: , The closer the value is to 1, the closer the actual coupling state is to the design goal;

[0059] Step 7: Optimize the parameters of the pattern convergence window

[0060] The mode fusion equalization coefficient and coupling stability are used as optimization objectives, and the mode convergence window size parameters are iteratively adjusted. During the optimization process, the length, width, height, and equivalent dielectric constant of the mode convergence window are adjusted simultaneously, and the fusion evaluation results are continuously updated. The comprehensive evaluation function is defined as:

[0061] ;

[0062] in, This represents the fusion equilibrium weighting coefficient. Let represent the coupling stable weight coefficients, and satisfy ... + =1; when satisfied The optimization ends when the time is right. This represents the evaluation value in the nth iteration. Indicates the convergence threshold;

[0063] Step 8: Integrated Molding Manufacturing

[0064] Once the comprehensive evaluation function reaches its optimal state, the optimized mode convergence window structure and the dielectric waveguide body are modeled as a whole. The filter blank is prepared using ceramic injection molding, dry pressing, gel casting, or additive manufacturing processes. The resonant region and mode convergence window structure are formed simultaneously through a single sintering process, so that multiple resonant modes can achieve stable coupling through the same mode convergence window, ultimately obtaining a multimode resonant integrated dielectric waveguide filter with high consistency and high stability.

[0065] like Figures 1-2 As shown in the figure, the principle of the integrated molded dielectric waveguide filter construction system based on multi-mode resonant mode fusion provided in this embodiment is as follows:

[0066] Includes: Modeling module: receives target filtering parameters input by the user, automatically builds a parametric 3D model of the dielectric waveguide body, and marks the positions of the input and output ports;

[0067] Field distribution generation module: Calls the electromagnetic simulation solver to perform eigenmode analysis on the main model output by the modeling module, generates electric field distribution data for multiple resonant modes, and extracts the resonant frequency, quality factor and initial coupling coefficient between modes for each mode.

[0068] Convergence Window Setting Module: Based on the electric field data provided by the field distribution generation module, calculates the spatial overlap coefficient and automatically locates the position with the largest overlap coefficient as the center of the mode convergence window; based on the set initial equivalent dielectric constant and shape, generates a low dielectric constant region in the geometric model, and supports manual adjustment of the convergence window position and size;

[0069] The optimization module includes evaluation units and an optimization engine. The evaluation units obtain the electromagnetic energy of each mode within the convergence window from the convergence window setting module and calculate the mode fusion equalization coefficient. ,in Simultaneously, the actual coupling coefficient is obtained and compared with the target coupling coefficient to calculate the coupling stability. ,in (Definition when denominator is zero) =0); Optimize the engine using a comprehensive evaluation function. ( + With the objective of (=1), an iterative optimization algorithm is used to adjust the length, width, height, and equivalent dielectric constant of the convergence window until the convergence condition is met. Output the optimal convergence window parameters;

[0070] Molding control unit: Receives the final overall model output by the optimization module, generates processing data and process parameters suitable for ceramic injection molding, dry pressing, gel casting or additive manufacturing equipment, and controls the one-time sintering process to realize the integrated molding and manufacturing of the filter;

[0071] This system can operate independently or be integrated into an electromagnetic simulation platform for the automated design of high-performance integrated dielectric waveguide filters.

[0072] This application also provides a computer-readable storage medium storing a computer program that is executed by a processor to implement some or all of the steps of any of the device control methods described in the above method embodiments.

[0073] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0074] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0075] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for constructing an integrated molded dielectric waveguide filter based on multi-mode resonant mode fusion, characterized in that, Includes the following steps: Establish the main body model of the dielectric waveguide based on the center frequency and bandwidth parameters of the target filter; Multiple resonance regions corresponding to multiple resonance modes are constructed within the dielectric waveguide body, so that multiple resonance modes form electromagnetic field distributions in different regions respectively. A mode convergence window is set at the intersection of the electromagnetic field distribution regions of multiple resonant modes. The mode convergence window is a local region within the dielectric waveguide body, and its equivalent dielectric constant is lower than that of the dielectric waveguide body. The mode convergence window serves as a unified energy exchange node for multiple resonant modes. The edge electromagnetic fields of each resonant mode are extended to the mode convergence window, through which energy exchange and coupling fusion between modes are achieved; The coupling strength between each resonant mode is controlled by adjusting the structural parameters of the convergence window of the target filter response adjustment mode. The adjusted structure is integrally molded to obtain a dielectric waveguide filter.

2. The method for constructing an integrated molded dielectric waveguide filter based on multi-mode resonant mode fusion according to claim 1, characterized in that: The plurality of resonant modes include a fundamental mode and at least one higher-order mode, wherein the fundamental mode and the higher-order mode correspond to different electric field distribution regions, and the electric field tail of each mode covers the mode convergence window region.

3. The method for constructing an integrated molded dielectric waveguide filter based on multi-mode resonant mode fusion according to claim 1, characterized in that: The mode convergence window is set in the central region of the dielectric waveguide or in the region where the electric field intensity of multiple resonant modes overlaps the most.

4. The method for constructing an integrated molded dielectric waveguide filter based on multi-mode resonant mode fusion according to claim 1, characterized in that: The mode convergence window is formed through a local cavity structure, a micropore array structure, a porous medium structure, or a low-density sintered structure.

5. The method for constructing an integrated molded dielectric waveguide filter based on multi-mode resonant mode fusion according to claim 1, characterized in that: The structural parameters of the mode convergence window include one or more of length, width, height, and equivalent dielectric constant. The energy transfer efficiency between modes can be changed by adjusting the structural parameters.

6. The method for constructing an integrated molded dielectric waveguide filter based on multi-mode resonant mode fusion according to claim 1, characterized in that: Increase the intermode coupling strength by increasing the volume of the mode convergence window, and decrease the intermode coupling strength by decreasing the volume of the mode convergence window; improve the mode conversion efficiency by reducing the equivalent dielectric constant of the mode convergence window region.

7. The method for constructing an integrated molded dielectric waveguide filter based on multi-mode resonant mode fusion according to claim 1, characterized in that: During the adjustment of the mode convergence window structure parameters, the resonant frequency, quality factor and mode coupling coefficient corresponding to each resonant mode are obtained, and the mode convergence window structure is iteratively optimized based on the resonant frequency, quality factor and mode coupling coefficient to obtain the preset filter response.

8. The method for constructing an integrated molded dielectric waveguide filter based on multi-mode resonant mode fusion according to claim 1, characterized in that: The integrated molding process employs any one of the following methods to form the integral dielectric waveguide body: ceramic injection molding, dry pressing, gel injection molding, or additive manufacturing. The multiple resonant regions and mode convergence windows are simultaneously formed through a single sintering process.

9. An integrated molded dielectric waveguide filter construction system based on multi-mode resonant mode fusion, characterized in that: It includes a modeling module, which is used to build a three-dimensional model of the dielectric waveguide body based on the target filtering parameters; The field distribution generation module is used to generate electromagnetic field distributions of multiple resonant modes within the dielectric waveguide body. The convergence window setting module is used to set a mode convergence window with an equivalent dielectric constant lower than that of the dielectric waveguide body at the intersection of multiple resonant mode electromagnetic field distribution regions. The optimization module is used to iteratively adjust the structural parameters of the mode convergence window with the mode fusion equilibrium coefficient and coupling stability as optimization objectives. The molding control module is used to output the optimized overall model and control the integrated molding process.

10. An electronic device, characterized in that, include: A processor and a memory, the processor being connected to the memory, the memory being used to store a computer program, the processor being used to execute the computer program stored in the memory to cause the electronic device to perform the method as described in any one of claims 1-8.

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