Real-time simulation method and system for electrothermal properties of elastic wave filter, and related device

Abstract

The present invention provides a real-time simulation method and system for electrothermal properties of an elastic wave filter, and a related device. The method comprises the following steps: establishing a finite element simulation heat transfer three-dimensional model of the elastic wave filter; setting a heating boundary condition of each resonator, and carrying out thermal simulation on each resonator; calculating an environment heat transfer tensor of the elastic wave filter; establishing an equivalent circuit model of the elastic wave filter, and then carrying out electrical simulation on the equivalent circuit model to obtain the heating power of the elastic wave filter; and coupling the environment heat transfer tensor with the heating power to finally obtain the real-time electrothermal properties of the elastic wave filter. The present invention has the beneficial effects that the environment heat transfer tensor of the elastic wave filter obtained by means of temperature simulation is coupled with the heating power, so that the temperature of each resonator on the elastic wave filter can be obtained by means of real-time simulation while using an equivalent circuit to design the elastic wave filter, thereby simplifying the steps of the temperature simulation, and greatly shortening the design period of the elastic wave filter.

Description

Real-time simulation method, system and related equipment for electrothermal performance of elastic wave filter Technical Field

[0001] The present invention is applicable to the fields of thermal simulation and wireless communication, and in particular relates to a real-time simulation method and system for the electrothermal performance of an elastic wave filter and related equipment. Background Art

[0002] With the development of communication technology, MEMS piezoelectric filters are continuously developing towards high frequency, low loss, and high power tolerance. Generally speaking, the higher the communication distance and quality requirements of the RF signal, the greater the input power that the MEMS piezoelectric filter needs to withstand.

[0003] Almost all power lost during device operation is dissipated as heat, meaning that power loss is similar to heat generation. Based on this principle, establishing a thermal analysis model that approximates the actual device to predict the thermal characteristics of MEMS filters is an important means of optimizing their power tolerance design. Simulating a filter's power tolerance effectively captures the temperature distribution across the filter after the electrical energy lost during operation is converted into heat. Through design optimization, the maximum temperature at a specified input power level does not reach the threshold for electrode damage.

[0004] Therefore, it is necessary to find a reasonable calculation model to organically combine the simulation results with the test results, monitor the temperature changes on the filter during simulation in real time, and realize accurate prediction of the filter input energy tolerance performance.

[0005] Summary of the Invention

[0006] The present invention provides a real-time simulation method, system and related equipment for the electrothermal performance of an elastic wave filter, aiming to solve the problem in the prior art that the influence of the packaging environment on the resonator during heating and the thermal crosstalk between resonators are not taken into account, resulting in the inability to reasonably compare the results with those obtained from actual elastic wave filter power testing, and thus the inability to provide optimization suggestions for the iterative design of the elastic wave filter.

[0007] To achieve the above objectives, in a first aspect, the present invention provides a method for real-time simulation of the electrothermal performance of an elastic wave filter, comprising the following steps:

[0008] Establishing a finite element simulation heat transfer three-dimensional model of the elastic wave filter; the elastic wave filter includes at least one resonator;

[0009] Assigning heating boundary conditions to each resonator respectively, performing thermal simulation on each resonator in turn according to a preset method using the finite element simulation heat transfer three-dimensional model, and obtaining a power input matrix and a temperature change matrix of all the resonators;

[0010] Calculating the ambient heat transfer tensor of the elastic wave filter according to the temperature change matrix and the power input matrix according to a heat transfer tensor calculation formula;

[0011] An equivalent circuit model of the elastic wave filter is established, and the ambient heat transfer amount is coupled with the equivalent circuit model to obtain the real-time electrothermal performance of the elastic wave filter.

[0012] Preferably, the steps of establishing an equivalent circuit model of the elastic wave filter, coupling the environmental heat transfer tensor with the equivalent circuit model, and obtaining the real-time electrothermal performance of the elastic wave filter specifically include: establishing an equivalent circuit model of the elastic wave filter, and then electrically simulating the equivalent circuit model to obtain the heating power of the elastic wave filter; coupling the environmental heat transfer tensor with the heating power to obtain the real-time temperature of each of the resonators, and obtaining the real-time electrothermal performance of the elastic wave filter based on the real-time temperature of each of the resonators.

[0013] Preferably, in the step of establishing the finite element simulation heat transfer three-dimensional model of the elastic wave filter, the finite element simulation heat transfer three-dimensional model of the elastic wave filter is established by finite element simulation software.

[0014] Preferably, the preset method includes the following steps:

[0015] The resonator S is defined as comprising n resonators, and the heating boundary condition of the resonator is P; wherein n is a positive integer; the heating boundary condition of the first resonator S1 is set to P1, and the heating boundary conditions of the other resonators are set to 0. The temperature set T1 of each resonator is obtained by thermal simulation: T1 = [a1 a2 a3 a4 a5];

[0016] Repeat the previous step to set the heating boundary conditions for the second resonator S2 to the nth resonator Sn, and then perform thermal simulation to obtain the temperature sets T2 to Tn of each resonator S respectively; finally, the power input matrix P and the temperature change matrix T are obtained:

[0017] Preferably, the heat transfer tensor calculation formula satisfies the following relationship: Ta=P·R;

[0018] Wherein, R represents the environmental heat transfer tensor, and a represents the ambient temperature when the elastic wave filter is operating.

[0019] Preferably, the real-time temperatures of the n resonators are respectively defined as T1n, satisfying the following relationship:

[0020] Wherein, P0 represents the heating power, represents the real-time temperature of n resonators.

[0021] Preferably, the equivalent circuit model is an mBVD ​​equivalent circuit model.

[0022] In a second aspect, the present invention further provides a real-time simulation system for the electrothermal performance of an elastic wave filter, comprising the following modules:

[0023] A model building module, configured to build a finite element simulation three-dimensional heat transfer model of the elastic wave filter, wherein the elastic wave filter includes at least one resonator;

[0024] a thermal simulation module, configured to assign heating boundary conditions to each resonator, and perform thermal simulation on each resonator in turn according to a preset method using the finite element simulation heat transfer three-dimensional model to obtain a power input matrix and a temperature change matrix for all the resonators;

[0025] a heat transfer tensor calculation module, configured to calculate the environmental heat transfer tensor of the elastic wave filter according to the temperature change matrix and the power input matrix and a heat transfer tensor calculation formula;

[0026] The equivalent circuit module is used to establish an equivalent circuit model of the elastic wave filter, couple the ambient heat transfer with the equivalent circuit model, and obtain the real-time electrothermal performance of the elastic wave filter.

[0027] In a third aspect, the present invention also provides a computer device comprising: a memory, a processor, and a real-time simulation program for the electrothermal performance of an elastic wave filter stored in the memory and runnable on the processor. When the processor executes the real-time simulation program for the electrothermal performance of an elastic wave filter, the processor implements the steps of the real-time simulation method for the electrothermal performance of an elastic wave filter as described in any one of the above embodiments.

[0028] In a fourth aspect, the present invention also provides a computer-readable storage medium, on which is stored a real-time simulation program for the electrothermal performance of an elastic wave filter. When the real-time simulation program for the electrothermal performance of an elastic wave filter is executed by a processor, the steps of the real-time simulation method for the electrothermal performance of an elastic wave filter as described in any one of the above embodiments are implemented.

[0029] Compared with the existing technology, the beneficial effect achieved by the present invention is that the environmental heat transfer tensor of the elastic wave filter is obtained through temperature simulation, which is introduced into the mBVD ​​equivalent circuit model of the elastic wave filter and coupled with the heating power of the equivalent circuit. This allows the elastic wave filter to be designed through the equivalent circuit while the temperature of each resonator on the elastic wave filter can be simulated in real time, which simplifies the temperature simulation steps and greatly shortens the design cycle of the elastic wave filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 1 is a flowchart of a method for real-time simulation of electrothermal performance of an elastic wave filter according to an embodiment of the present invention;

[0031] 2 is a schematic diagram of a three-dimensional heat transfer model of an elastic wave filter using finite element simulation according to a method for real-time simulation of electrothermal performance of an elastic wave filter provided by an embodiment of the present invention;

[0032] 3 is a schematic diagram of the topological structure of an equivalent circuit of an elastic wave filter according to a method for real-time simulation of electrothermal performance of an elastic wave filter provided by an embodiment of the present invention;

[0033] 4 is a schematic diagram of resonator temperature changes during electrical simulation of a method for real-time simulation of electrothermal performance of an elastic wave filter provided by an embodiment of the present invention;

[0034] 5 is a schematic diagram of a real-time simulation system for electrothermal performance of an elastic wave filter provided in an embodiment of the present invention;

[0035] FIG6 is a schematic diagram of a computer device for real-time simulation of the electrothermal performance of an elastic wave filter provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] (Example 1)

[0038] Please refer to FIG. 1 , which is a flowchart of a method for real-time simulation of electrothermal performance of an elastic wave filter provided by an embodiment of the present invention.

[0039] S101 . Establish a finite element simulation heat transfer three-dimensional model of the elastic wave filter, where the elastic wave filter includes at least one resonator.

[0040] Please refer to FIG. 2 , which is a schematic diagram of a three-dimensional heat transfer model of an elastic wave filter finite element simulation according to a method for real-time simulation of electrothermal performance of an elastic wave filter provided by an embodiment of the present invention;

[0041] In an embodiment of the present invention, a three-dimensional finite element simulation heat transfer model of the elastic wave filter is established using finite element simulation software, such as COMSOL or lcepek. The elastic wave filter in this embodiment includes five resonators: resonator S1, resonator S2, resonator S3, resonator S4, and resonator S5. This is merely exemplary, and the number of resonators in the elastic wave filter can be adjusted based on actual conditions. The established three-dimensional finite element simulation heat transfer model is shown in Figure 2.

[0042] S102 , assigning heating boundary conditions to each resonator respectively, and performing thermal simulation on each resonator in turn according to a preset method using the finite element simulation heat transfer three-dimensional model to obtain power input matrices and temperature change matrices of all the resonators.

[0043] In an embodiment of the present invention, the heating boundary condition is the heating power of the resonator. For example, the heating powers corresponding to the resonators S1, S2, S3, S4 and S5 are set to P1, P2, P3, P4 and P5 respectively, and P1 = 0.3W, P2 = 0.2W, P3 = 0.4W, P4 = 0.3W and P5 = 0.2W. The above heating powers can be given randomly and do not have to conform to the actual heating powers. Then perform a thermal simulation. When performing the thermal simulation, make one resonator heat up in turn, and set the heating power of other resonators to 0. Obtain the temperature change of each resonator to establish the corresponding temperature change matrix T1, T2, T3, T4 and T5.

[0044] For example: the heating power P1 is set to 0.3W for resonator S1, and the heating power of other resonators is 0, and the temperature on each resonator is obtained. Then the temperature change matrix T1 of resonator S1 is [161.2 36.182 20.776 24.121 23.028], and the power input matrix of resonator S1 is [0.3 0 0 0 0]; the heating power P2 is assigned to resonator S2 = 0.2W, and the heating power of other resonators is 0. The temperature on each resonator is obtained. Then the temperature change matrix T2 of resonator S2 is [30.788 112.23 23.564 23.203 31.407], and the power input matrix of resonator S2 is [0 0.2 0 0 0].

[0045] If there are n resonators, thermal simulation is performed n times. In the embodiment of the present invention, n=5. Finally, the power input matrix of each resonator is calculated to obtain the power input matrix P.

[0046] The temperature change matrix T is obtained by calculating the temperature change matrix of each resonator.

[0047] S103 , calculating the environmental heat transfer tensor of the elastic wave filter according to the temperature change matrix and the power input matrix and a heat transfer tensor calculation formula.

[0048] In an embodiment of the present invention, the heat transfer tensor calculation formula satisfies the following relationship: Ta=P·R;

[0049] Where a represents the ambient temperature during operation of the elastic wave filter, and R represents the ambient heat transfer tensor. For example, when the ambient temperature during operation of the elastic wave filter is 20 degrees Celsius, i.e., a = 20°C, and substituting the temperature change matrix P and the power input matrix T in step S102 into the equation, we obtain:

[0050] S104 , establishing an equivalent circuit model of the elastic wave filter, coupling the ambient heat transfer amount with the equivalent circuit model, and obtaining real-time electrothermal performance of the elastic wave filter.

[0051] Please refer to FIG. 3 , which is a schematic diagram of the topological structure of an equivalent circuit of an elastic wave filter according to a method for real-time simulation of electrothermal performance of an elastic wave filter provided by an embodiment of the present invention;

[0052] In an embodiment of the present invention, an mBVD ​​(Modified Butterworth-Van Dyke) equivalent circuit model is used to establish a corresponding equivalent circuit model for the elastic wave filter. The mBVD ​​equivalent circuit model can be used to describe the equivalent circuit of the resonator, thereby helping to design and analyze the performance of the resonator. The equivalent topological structure of the established equivalent circuit model is shown in Figure 3, where port 1 is the signal input terminal, port 2 is the signal output terminal, and ports 3 and 4 are ground terminals. Electrical simulation is then performed using the RF simulation software ADS (Advanced Design System). When the RF simulation software performs electrical simulation, the electric power consumed by each resonator, that is, the heating power of the resonator, can be obtained by calculating the current and voltage on each resistor. For example, after inputting the power of the elastic wave filter, the heating powers corresponding to the resonators S1-S5 can be obtained as P11, P12, P13, P14 and P15 respectively. The heating power of the elastic wave filter is defined as P0, then P0 = [P11, P12, P13, P14, P15].

[0053] In the embodiment of the present invention, when the number of the resonators is n, the real-time temperatures of the n resonators are respectively defined as T1n satisfying the following relationship:

[0054] in, represents the real-time temperature of n resonators.

[0055] For example, by converting the ambient heat transfer tensor R obtained in step S103 with the heating power P0 in the mBVD ​​equivalent circuit obtained in step S104, the temperatures T11, T12, T13, T14, and T15 corresponding to the resonators S1-S5 can be obtained in real time. The real-time temperatures of the resonators S1-S5 satisfy the following relationship:

[0056] Substituting the ambient heat transfer tensor R obtained in step S103 and the heating power P0 obtained in step S104, we can obtain: T11=(1412*P11) / 3+(2697*P12) / 50+(517*P13) / 200+(4121*P14) / 300+(2019*P15) / 200; T12=(2697*P11) / 50+(9223*P12) / 20+(7129*P13) / 400+(1201*P14) / 75+(11407*P15) / 200; T13=(194*P11) / 75+(891*P12) / 50+(19199*P13) / 40+(789*P14) / 100+ (2157*P15) / 200; T14=(4121*P11) / 300+(3203*P12) / 200+(789*P13) / 100+(3347*P14) / 5+ (447*P15) / 200; T15=(757*P11) / 75+(11407*P12) / 200+(4313*P13) / 400+(67*P14) / 30+ (6827*P15) / 10.

[0057] The above data is coupled to radio frequency simulation software, and the real-time electrothermal performance of the elastic wave filter is obtained according to the real-time temperature of each resonator.

[0058] Please refer to FIG. 4 , which is a schematic diagram of resonator temperature changes during electrical simulation of a method for real-time simulation of electrothermal performance of an elastic wave filter provided by an embodiment of the present invention;

[0059] When performing electrical simulations using RF simulation software, the heat generation power of each resonator can be obtained in real time, regardless of how the equivalent circuit is designed or optimized. Furthermore, through the real-time temperature relationship of the resonator, the heat generation temperatures T11-T15 of the resonators S1-S5 at different input powers and operating frequencies can be obtained at any time. For example, as shown in Figure 4, the elastic wave filter input power is defined as Pin. When Pin = 32mW, the temperature changes of resonators S1-S5. The five curves below the elastic wave filter insertion loss curve represent the temperature changes of resonators S1-S5 at different operating frequencies of the elastic wave filter. RFfreq represents the elastic wave filter operating frequency, HB.T14 represents the resonator temperature, and point m2 represents the resonator temperature change HB.T14 = 4.918 when the elastic wave filter operating frequency RFfreq = 1.829E9. Point m3 represents the resonator temperature change HB.T14 = 4.382 when the elastic wave filter operating frequency RFfreq = 1.905E9. The present invention substitutes the ambient heat transfer tensor obtained by temperature simulation into the mBVD ​​equivalent circuit model of the elastic wave filter through electrothermal coupling, thereby realizing real-time prediction of the temperature distribution of the elastic wave filter under different input powers during design.

[0060] Compared with the existing technology, the beneficial effect achieved by the present invention is that the environmental heat transfer tensor of the elastic wave filter is obtained through temperature simulation, which is introduced into the mBVD ​​equivalent circuit model of the elastic wave filter and coupled with the heating power of the equivalent circuit. This allows the elastic wave filter to be designed through the equivalent circuit while the temperature of each resonator on the elastic wave filter can be simulated in real time, which simplifies the temperature simulation steps and greatly shortens the design cycle of the elastic wave filter.

[0061] (Example 2)

[0062] The present invention also provides a real-time simulation system for the electrothermal performance of an elastic wave filter. Referring to FIG. 5 , FIG. 5 is a schematic diagram of the structure of a real-time simulation system 200 for the electrothermal performance of an elastic wave filter according to an embodiment of the present invention, which includes:

[0063] 201. A model building module, configured to build a finite element simulation heat transfer three-dimensional model of the elastic wave filter; the elastic wave filter includes at least one resonator.

[0064] In an embodiment of the present invention, a finite element simulation heat transfer three-dimensional model of the elastic wave filter is established using finite element simulation software, such as COMSOL or lcepek. Furthermore, the number of resonators in the elastic wave filter can be adjusted according to actual conditions.

[0065] 202. A thermal simulation module, configured to assign heating boundary conditions to each of the resonators, and perform thermal simulation on each of the resonators in turn according to a preset method using the finite element simulation heat transfer three-dimensional model to obtain a power input matrix and a temperature change matrix for all the resonators.

[0066] In an embodiment of the present invention, the heating boundary condition is the heating power of the resonator. The heating power of each resonator is set, and the heating power can be randomly given and does not have to conform to the actual heating power. Then a thermal simulation is performed. When performing the thermal simulation, one of the resonators is heated in turn, and the heating power of the other resonators is set to 0, so as to obtain the temperature change of each resonator, thereby establishing a corresponding temperature change matrix and a corresponding power input matrix. Exemplary, for example: when the number of resonators is 5, define the first resonator as S1, set the heating power to P1, and the temperature matrix to T1. Set the heating power P1 = 0.3W, and the heating power of other resonators to 0, and obtain the temperature on each resonator. Then the temperature matrix T1 of the resonator S1 is [161.2 36.182 20.776 24.121 23.028], and the power input matrix of the resonator S1 is [0.3 0 0 0 0]. Then, a temperature change matrix is ​​established based on the power input matrix of each resonator, and a power input matrix is ​​established based on the temperature change matrix of each resonator.

[0067] 203. A heat transfer tensor calculation module, configured to calculate the environmental heat transfer tensor of the elastic wave filter according to the temperature change matrix and the power input matrix and a heat transfer tensor calculation formula.

[0068] In an embodiment of the present invention, the heat transfer tensor calculation formula satisfies the following relationship: Ta=P·R;

[0069] Wherein, a represents the ambient temperature when the elastic wave filter is operating, R represents the ambient heat transfer tensor, P represents the temperature change matrix, and T represents the power input matrix.

[0070] 204. An equivalent circuit module, configured to establish an equivalent circuit model of the elastic wave filter, couple the ambient heat transfer with the equivalent circuit model, and obtain real-time electrothermal performance of the elastic wave filter.

[0071] In an embodiment of the present invention, the equivalent circuit model is an mBVD ​​equivalent circuit model, and electrical simulation is performed using RF simulation software ADS (Advanced Design System). During electrical simulation using the RF simulation software, the electrical power consumed by each resonator, i.e., the heat generation power of the resonator, can be obtained by calculating the current and voltage across each resistor.

[0072] In the embodiment of the present invention, when the number of the resonators is n, the real-time temperatures of the n resonators are respectively defined as T1n, satisfying the following relationship:

[0073] Where P0 represents the heat generation power of the elastic wave filter, represents the real-time temperature of n resonators.

[0074] The elastic wave filter electrothermal performance real-time simulation system 200 can implement the steps in the elastic wave filter electrothermal performance real-time simulation method in the above embodiment and can achieve the same technical effects. Please refer to the description in the above embodiment and will not be repeated here.

[0075] (Example 3)

[0076] An embodiment of the present invention further provides a computer device. Please refer to Figure 6, which is a structural diagram of the computer device provided by an embodiment of the present invention. The computer device 300 includes: a memory 302, a processor 301, and a real-time simulation program for the electrothermal performance of an elastic wave filter stored in the memory 302 and capable of running on the processor 301.

[0077] The processor 301 calls the elastic wave filter electrothermal performance real-time simulation program stored in the memory 302 to execute the steps of the elastic wave filter electrothermal performance real-time simulation method provided by the embodiment of the present invention. Referring to FIG1 , the method specifically includes the following steps:

[0078] S101, establishing a finite element simulation heat transfer three-dimensional model of the elastic wave filter; the elastic wave filter includes at least one resonator;

[0079] S102, assigning heating boundary conditions to each resonator respectively, performing thermal simulation on each resonator in turn according to a preset method using the finite element simulation heat transfer three-dimensional model, and obtaining a power input matrix and a temperature change matrix of all the resonators;

[0080] S103, calculating the environmental heat transfer tensor of the elastic wave filter according to the temperature change matrix and the power input matrix and the heat transfer tensor calculation formula;

[0081] S104 , establishing an equivalent circuit model of the elastic wave filter, coupling the ambient heat transfer amount with the equivalent circuit model, and obtaining real-time electrothermal performance of the elastic wave filter.

[0082] The computer device 300 provided in the embodiment of the present invention can implement the steps in the real-time simulation method of the electrothermal performance of the elastic wave filter in the above embodiment and can achieve the same technical effects. Please refer to the description in the above embodiment and will not be repeated here.

[0083] (Example 4)

[0084] An embodiment of the present invention further provides a computer-readable storage medium, on which is stored a real-time simulation program for the electrothermal performance of an elastic wave filter. When the real-time simulation program for the electrothermal performance of an elastic wave filter is executed by a processor, the various processes and steps in the real-time simulation method for the electrothermal performance of an elastic wave filter provided in an embodiment of the present invention are implemented, and the same technical effects can be achieved. To avoid repetition, they are not described here.

[0085] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing related hardware through a computer program. The program can be stored in a computer-readable storage medium, and when executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0086] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0087] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0088] The embodiments of the present invention are described above in conjunction with the accompanying drawings. What is disclosed is only a preferred embodiment of the present invention. However, the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms and equivalent changes without departing from the scope of protection of the purpose of the present invention and the claims, which are all within the protection of the present invention.

Claims

1. A real-time simulation method for the electrothermal performance of an elastic wave filter, characterized in that: The elastic wave filter electrothermal performance real-time simulation method comprises the following steps: Establishing a finite element simulation heat transfer three-dimensional model of the elastic wave filter; the elastic wave filter includes at least one resonator; Assigning heating boundary conditions to each of the resonators respectively, and performing thermal simulation on each of the resonators in turn according to a preset method through the finite element simulation heat transfer three-dimensional model to obtain a power input matrix and a temperature change matrix of all the resonators; According to the temperature change matrix and the power input matrix, the environmental heat transfer tensor of the elastic wave filter is calculated according to the heat transfer tensor calculation formula; An equivalent circuit model of the elastic wave filter is established, and the environmental heat transfer amount is coupled with the equivalent circuit model to obtain the real-time electrothermal performance of the elastic wave filter.

2. The real-time simulation method for electrothermal performance of elastic wave filter according to claim 1, characterized in that: The step of establishing an equivalent circuit model of the elastic wave filter, coupling the environmental heat transfer quantity with the equivalent circuit model, and obtaining the real-time electrothermal performance of the elastic wave filter specifically includes: Establishing an equivalent circuit model of the elastic wave filter, and then performing electrical simulation on the equivalent circuit model to obtain the heating power of the elastic wave filter; The environmental heat transfer tensor is coupled with the heat generation power to obtain the real-time temperature of each of the resonators, and the real-time electrothermal performance of the elastic wave filter is obtained according to the real-time temperature of each of the resonators.

3. The real-time simulation method for electrothermal performance of elastic wave filter according to claim 1, characterized in that: In the step of establishing the finite element simulation heat transfer three-dimensional model of the elastic wave filter, the finite element simulation heat transfer three-dimensional model of the elastic wave filter is established by using finite element simulation software.

4. The real-time simulation method for electrothermal performance of elastic wave filter according to claim 2, characterized in that: The preset method comprises the following steps: It is defined that the resonator S includes n, and the heating boundary condition of the resonator is P; wherein n is a positive integer; The heating boundary condition of the first resonator S1 is set to P1, and the heating boundary conditions of the other resonators are set to 0. The temperature set T1 of each resonator is obtained by thermal simulation: T1 = [a1 a2 a3 a4 a5]; Repeat the previous step to set the heating boundary conditions for the second resonator S2 to the nth resonator Sn in turn, and then perform thermal simulation processing to obtain the temperature sets T2 to Tn of each resonator S respectively; finally, the power input matrix P and the temperature change matrix T are obtained:

5. The real-time simulation method for electrothermal performance of elastic wave filter according to claim 4, characterized in that: The heat transfer tensor calculation formula satisfies the following relationship: Ta = P·R; Wherein, R represents the environmental heat transfer tensor, and a represents the environmental temperature when the elastic wave filter is working.

6. The real-time simulation method for electrothermal performance of elastic wave filter according to claim 5, characterized in that: The real-time temperatures of the n resonators are defined as T1n, respectively, satisfying the following relationship: Wherein, P0 represents the heating power, Represents the real-time temperatures of n resonators.

7. The real-time simulation method for electrothermal performance of elastic wave filter according to claim 1, characterized in that: The equivalent circuit model is an mBVD ​​equivalent circuit model.

8. A real-time simulation system for the electrothermal performance of an elastic wave filter, characterized in that: Includes the following modules: A model building module, used to build a finite element simulation heat transfer three-dimensional model of the elastic wave filter, wherein the elastic wave filter includes at least one resonator; A thermal simulation module, used to respectively assign heating boundary conditions to each of the resonators, and to perform thermal simulation on each of the resonators in turn according to a preset method through the finite element simulation heat transfer three-dimensional model, so as to obtain a power input matrix and a temperature change matrix of all the resonators; A heat transfer tensor calculation module, used to calculate the environmental heat transfer tensor of the elastic wave filter according to the temperature change matrix and the power input matrix according to the heat transfer tensor calculation formula; The equivalent circuit module is used to establish an equivalent circuit model of the elastic wave filter, couple the environmental heat transfer amount with the equivalent circuit model, and obtain the real-time electrothermal performance of the elastic wave filter.

9. A computer device, characterized in that: include: A memory, a processor, and a real-time simulation program for the electrothermal performance of an elastic wave filter stored in the memory and executable on the processor. When the processor executes the real-time simulation program for the electrothermal performance of an elastic wave filter, the steps of the real-time simulation method for the electrothermal performance of an elastic wave filter as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a real-time simulation program for the electrothermal performance of an elastic wave filter. When the real-time simulation program for the electrothermal performance of an elastic wave filter is executed by a processor, the steps of the real-time simulation method for the electrothermal performance of an elastic wave filter as described in any one of claims 1 to 7 are implemented.

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