CN115470735B - SAW physical simulation method, system and related equipment - Google Patents
SAW physical simulation method, system and related equipment Download PDFInfo
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Abstract
The invention belongs to the field of wireless communication, and particularly relates to a SAW physical simulation method, a SAW physical simulation system and related equipment, wherein the SAW physical simulation method comprises the following steps: determining basic parameters of the finger; constructing different simulation finger bar objects according to the basic parameters and the preset space positions; connecting different simulation finger objects according to a preset electrical rule to obtain a plurality of simulation resonator objects, and calculating electrical response parameters of each simulation resonator object; connecting different simulation resonator objects with the circuit matching element object according to a preset electrical rule to obtain a simulation filter unit, and calculating the overall electrical response parameters of the simulation filter unit according to the electrical response parameters corresponding to the simulation resonator objects used in connection; coupling the simulation filter unit with a scattering matrix of the radio frequency front end object according to a preset electrical rule to obtain a physical simulation result of the simulation radio frequency front end module formed by the simulation filter unit. The invention realizes the integration of SAW physical simulation schemes.
Description
Technical Field
The invention belongs to the field of wireless communication, and particularly relates to a SAW physical simulation method, a SAW physical simulation system and related equipment.
Background
Whether the design of the acoustic surface filter (Surface Acoustic Wave, simply called SAW) is reliable depends on the accuracy of a physical simulation model of the acoustic surface filter, and in terms of types, the physical simulation of the SAW is roughly divided into three categories of an equivalent circuit Model (MBVD), a coupling mode model (COM) and a Finite Element Method (FEM), wherein the accuracy is low due to the fact that the equivalent circuit model is greatly simplified to the actual physics, and the finite element method cannot be used for the rapid iterative design of the SAW device because of slow calculation, and the coupling mode model is more balanced compared with other two methods in terms of both calculation accuracy and speed, so the acoustic surface filter is also widely applied to design iteration.
SAW device designs often require multiple design modes to be compatible with different frequency bands and specifications. Under the condition of strict specification requirements, the SAW device needs matching elements such as an interdigital transducer (IDT), a double-mode surface acoustic wave structure (DMS), a capacitance inductor and the like to jointly form a circuit with a relatively complex structure. Among these, the complex variability of DMS in design is particularly prominent, which may itself include combinations of IDTs of different orders. In order to satisfy the above-mentioned simulation requirements of each layer, EDA (Electronic Design Automation ) software is required to simultaneously support the simulation at the resonator level, including IDT, each order DMS, and the like, and the simulation at the filter level, including circuit structure, matching elements, electromagnetic effects, and the like.
In the prior art, the simulation of IDTs, each stage of DMS, circuit simulation, matching elements and electromagnetic influence is always independent software modules, and even the simulation of the DMS, the independent second-stage DMS, third-stage DMS, fifth-stage DMS and the like can occur. The existing simulation method lacks generality, cannot be expanded, and is difficult to systematically integrate into a complete simulation scheme.
Disclosure of Invention
The embodiment of the invention provides a SAW physical simulation method, a SAW physical simulation system and related equipment, which aim to solve the problems that the traditional simulation scheme lacks generality and cannot be expanded and is difficult to systematically integrate.
In a first aspect, an embodiment of the present invention provides a method for SAW physical simulation, the method including the steps of:
determining basic parameters of the finger, wherein the basic parameters comprise geometric parameters, material parameters, adjustment parameters and intermediate variables;
constructing different simulation finger strip objects according to the basic parameters and preset space positions, wherein the simulation finger strip objects comprise electrode objects, reflecting grating objects and interval objects;
connecting different simulation finger bar objects according to a preset electrical rule to obtain a plurality of simulation resonator objects, and calculating an electrical response parameter of each simulation resonator object;
connecting different simulation resonator objects with a circuit matching element object according to a preset electrical rule to obtain a simulation filter unit, and calculating the overall electrical response parameters of the simulation filter unit according to the electrical response parameters corresponding to the simulation resonator objects used in connection;
coupling the simulation filter unit with a scattering matrix of the radio frequency front end object according to a preset electrical rule to obtain a physical simulation result of a simulation radio frequency front end module formed by the simulation filter unit.
Further, the preset spatial position is a spatial position determined according to physical characteristics of the electrode object, the reflecting grating object and the interval object, wherein the basic parameters form the finger strip object.
Furthermore, the preset electrical rule is to determine the circuit connection mode of the simulation resonator object, the simulation filter unit and the simulation radio frequency front end module according to the physical characteristics of the simulation finger object, the simulation resonator object and the circuit matching element object, or the simulation filter unit and the simulation radio frequency front end object.
Still further, the simulated resonator object includes an IDT object and a DMS object.
Still further, the circuit matching element objects include capacitive objects, inductive objects, and circuit simulation objects that embody the physical characteristics of the circuit elements.
Still further, the radio frequency front end object includes a switch object, an amplifier object, and a low noise amplifier object.
In a second aspect, an embodiment of the present invention further provides a SAW physical simulation system, including:
the basic parameter setting module is used for determining basic parameters of the finger strip, wherein the basic parameters comprise geometric parameters, material parameters, adjustment parameters and intermediate variables;
the finger setting module is used for constructing different simulation finger objects according to the basic parameters and preset space positions, wherein the simulation finger objects comprise electrode objects, reflecting grating objects and interval objects;
the resonator setting module is used for connecting different simulation finger bar objects according to a preset electrical rule to obtain a plurality of simulation resonator objects, and calculating the electrical response parameter of each simulation resonator object;
the filter setting module is used for connecting different simulation resonator objects with the circuit matching element object according to a preset electrical rule to obtain a simulation filter unit, and calculating the overall electrical response parameters of the simulation filter unit according to the electrical response parameters corresponding to the simulation resonator objects used for connection;
and the module simulation module is used for coupling the simulation filter unit with the scattering matrix of the radio frequency front end object according to a preset electrical rule to obtain a physical simulation result of the simulation radio frequency front end module formed by the simulation filter unit.
In a third aspect, an embodiment of the present invention further provides a computer apparatus, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps in a method of SAW physical simulation as in any one of the embodiments above when the computer program is executed.
In a fourth aspect, embodiments of the present invention also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a method of SAW physical simulation as described in any of the above embodiments.
The invention has the beneficial effects that the construction of each layer of the simulation object is realized by a simulation programming mode, the basic units of the filter are formed, each basic resonator unit is independently constructed by inheriting a nested mode, and the connection relation between resonator units can be arbitrarily appointed when the basic resonator units are combined to the filter layer, so that the simulation calculation can be endowed with larger degree of freedom, the flexible filter design and large-scale rapid iteration are facilitated, meanwhile, the acoustic-electric coupling calculation of the IDT and the DMS and the electric calculation of the circuit and the matching element are compatible in the same simulation framework, the DMS design of various orders of various structures can be compatible, and the integration of the SAW physical simulation scheme is realized.
Drawings
FIG. 1 is a flow chart of steps of a method for SAW physical simulation provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of an electrode object according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a simulated resonator object provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of connection relationships of a simulation filter unit circuit according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a filter waveform of a simulated rf front end module according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a SAW physical simulation system provided by an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating steps of a SAW physical simulation method according to an embodiment of the present invention, where the method includes the following steps:
s101, determining basic parameters of the finger, wherein the basic parameters comprise geometric parameters, material parameters, adjustment parameters and intermediate variables.
Specifically, step S101 is to describe properties of a finger unit, where the geometric parameters include a series of geometric dimensions such as finger width, aperture length, electrode thickness, etc.; the material parameters comprise parameters such as wave speed, piezoelectric coupling coefficient and the like of the piezoelectric substrate; the adjustment parameters are a series of adjustment physical quantities existing in the coupling die method for fitting the actual physical phenomenon; intermediate variables are some of the properties defined to facilitate finger stick calculations.
Illustratively, when the finger is one of a set of metal electrodes or a gap, the basic parameters include:
geometric parameters: for one electrode, finger width, metallization rate, electrode height, aperture length are required; for a gap, the width of the gap is required.
Material parameters: relative permittivity, reference wave velocity, parameters representing SAW penetration depth, parameters representing SAW reflection, electromechanical coupling coefficient of the material.
Adjusting parameters: loss coefficient, relative resistance due to capacitance at high frequency, electromechanical coupling coefficient adjustment coefficient, reflection coefficient adjustment coefficient.
Intermediate variables: such as polarity of the electrodes (either grounded or electrically connected), center frequency, amplitude of the wave, etc.
S102, constructing different simulation finger bar objects according to the basic parameters and preset space positions, wherein the simulation finger bar objects comprise electrode objects, reflecting grating objects and interval objects.
Further, the preset spatial position is a spatial position determined according to physical characteristics of the electrode object, the reflecting grating object and the interval object, wherein the basic parameters form the finger strip object.
The method for calculating the P matrix by the electrode object, the reflecting grating object and the interval object is different from each other due to different finger positions in the space, and the method for carrying out P matrix cascade connection is different.
Referring to fig. 2, fig. 2 is a schematic diagram of an electrode object provided by an embodiment of the present invention, and fig. 2 is an integral body formed by a plurality of single electrodes, where each electrode may have a different electrode width, a different aperture length, and a different electrode polarity.
And S103, connecting different simulation finger bar objects according to a preset electrical rule to obtain a plurality of simulation resonator objects, and calculating the electrical response parameters of each simulation resonator object.
Furthermore, the preset electrical rule is to determine the circuit connection mode of the simulation resonator object, the simulation filter unit and the simulation radio frequency front end module according to the physical characteristics of the simulation finger object, the simulation resonator object and the circuit matching element object, or the simulation filter unit and the simulation radio frequency front end object.
Still further, the simulated resonator object includes an IDT object and a DMS object. For example, in the simulation finger object obtained in step S102, a function of how to cascade between different fingers may be stored in each finger object, so that when different structures are calculated, the cascade may be performed in any manner, and referring to fig. 3, fig. 3 shows structures of the simulation resonator object obtained by cascading the simulation finger object according to an embodiment of the present invention, which are respectively a uniform IDT resonator uniform in a propagation direction and an aperture direction, a third-order symmetric DMS gradually changed in the propagation direction, and a fourth-order asymmetric DMS inserted in the middle and gradually changed in the aperture direction.
And S104, connecting different simulation resonator objects with the circuit matching element object according to a preset electrical rule to obtain a simulation filter unit, and calculating the overall electrical response parameters of the simulation filter unit according to the electrical response parameters corresponding to the simulation resonator objects used in connection.
Still further, the circuit matching element objects include capacitive objects, inductive objects, and circuit simulation objects that embody the physical characteristics of the circuit elements.
For example, step S104 may calculate the overall electrical response parameters of the simulation filter unit of the simplex, the double SAW, the duplexer, etc., referring to fig. 4, fig. 4 is a schematic diagram of the connection relationship of the simulation filter unit circuit provided by the embodiment of the present invention, including three input/output ports with triangular shapes, a plurality of components with circular shapes such as capacitors, inductors, IDTs, DMS, etc., and connection nodes and ground nodes between the components with polygonal shapes.
S105, coupling the simulation filter unit with a scattering matrix of the radio frequency front end object according to a preset electrical rule to obtain a physical simulation result of a simulation radio frequency front end module formed by the simulation filter unit.
Still further, the radio frequency front end object includes a switch object, an amplifier object, and a low noise amplifier object.
Referring to fig. 5, for example, fig. 5 is a schematic diagram of a filter waveform of a simulation radio frequency front end module provided by the embodiment of the present invention, it can be seen that a physical simulation result obtained by using the SAW physical simulation method according to the embodiment of the present invention can well simulate a required filter characteristic.
The invention has the beneficial effects that the construction of each layer of the simulation object is realized by a simulation programming mode, the basic units of the filter are formed, each basic resonator unit is independently constructed by inheriting a nested mode, and the connection relation between resonator units can be arbitrarily appointed when the basic resonator units are combined to the filter layer, so that the simulation calculation can be endowed with larger degree of freedom, the flexible filter design and large-scale rapid iteration are facilitated, meanwhile, the acoustic-electric coupling calculation of the IDT and the DMS and the electric calculation of the circuit and the matching element are compatible in the same simulation framework, the DMS design of various orders of various structures can be compatible, and the integration of the SAW physical simulation scheme is realized.
Referring to fig. 6, fig. 6 is a schematic structural diagram of the SAW physical simulation system provided by the embodiment of the present invention, and SAW physical simulation system 200 includes:
a basic parameter setting module 201, configured to determine basic parameters of the finger, where the basic parameters include a geometric parameter, a material parameter, an adjustment parameter, and an intermediate variable;
the finger setting module 202 is configured to construct different simulation finger objects according to the basic parameters and preset spatial positions, where the simulation finger objects include an electrode object, a reflective grid object and a spacer object;
the resonator setting module 203 is configured to connect different simulation finger objects according to a preset electrical rule, obtain a plurality of simulation resonator objects, and calculate an electrical response parameter of each simulation resonator object;
the filter setting module 204 is configured to connect different simulated resonator objects with a circuit matching element object according to a preset electrical rule, obtain a simulated filter unit, and calculate an overall electrical response parameter of the simulated filter unit according to the electrical response parameter corresponding to the simulated resonator object used by connection;
and the module simulation module 205 is configured to couple the simulation filter unit with a scattering matrix of a radio frequency front end object according to a preset electrical rule, so as to obtain a physical simulation result of a simulation radio frequency front end module formed by the simulation filter unit.
The SAW physical simulation system 200 can implement the steps in the method for SAW physical simulation in the above embodiment, and can implement the same technical effects, and will not be described in detail herein with reference to the description in the above embodiment.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a computer device according to an embodiment of the present invention, where the computer device 300 includes: a memory 302, a processor 301 and a computer program stored on the memory 302 and executable on the processor 301.
The processor 301 invokes the computer program stored in the memory 302 to execute the steps in the SAW physical simulation method provided in the embodiment of the present invention, please refer to fig. 1, specifically including:
s101, determining basic parameters of the finger, wherein the basic parameters comprise geometric parameters, material parameters, adjustment parameters and intermediate variables;
s102, constructing different simulation finger bar objects according to the basic parameters and preset space positions, wherein the simulation finger bar objects comprise electrode objects, reflecting grating objects and interval objects;
s103, connecting different simulation finger bar objects according to a preset electrical rule to obtain a plurality of simulation resonator objects, and calculating an electrical response parameter of each simulation resonator object;
s104, connecting different simulation resonator objects with the circuit matching element object according to a preset electrical rule to obtain a simulation filter unit, and calculating the overall electrical response parameters of the simulation filter unit according to the electrical response parameters corresponding to the simulation resonator objects used in connection;
s105, coupling the simulation filter unit with a scattering matrix of the radio frequency front end object according to a preset electrical rule to obtain a physical simulation result of a simulation radio frequency front end module formed by the simulation filter unit.
Further, the preset spatial position is a spatial position determined according to physical characteristics of the electrode object, the reflecting grating object and the interval object, wherein the basic parameters form the finger strip object.
Furthermore, the preset electrical rule is to determine the circuit connection mode of the simulation resonator object, the simulation filter unit and the simulation radio frequency front end module according to the physical characteristics of the simulation finger object, the simulation resonator object and the circuit matching element object, or the simulation filter unit and the simulation radio frequency front end object.
Still further, the simulated resonator object includes an IDT object and a DMS object.
Still further, the circuit matching element objects include capacitive objects, inductive objects, and circuit simulation objects that embody the physical characteristics of the circuit elements.
Still further, the radio frequency front end object includes a switch object, an amplifier object, and a low noise amplifier object.
The computer device 300 provided in the embodiment of the present invention can implement the steps in the SAW physical simulation method in the above embodiment, and can implement the same technical effects, and is not described herein again with reference to the description in the above embodiment.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements each process and step in the SAW physical simulation method provided by the embodiment of the invention, and can implement the same technical effects, so that repetition is avoided, and no further description is provided herein.
Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM) or the like.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
While the embodiments of the present invention have been illustrated and described in connection with the drawings, what is presently considered to be the most practical and preferred embodiments of the invention, it is to be understood that the invention is not limited to the disclosed embodiments, but on the contrary, is intended to cover various equivalent modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (9)
1. A method of SAW physics simulation, the method comprising the steps of:
determining basic parameters of the finger, wherein the basic parameters comprise geometric parameters, material parameters, adjustment parameters and intermediate variables;
constructing different simulation finger strip objects according to the basic parameters and preset space positions, wherein the simulation finger strip objects comprise electrode objects, reflecting grating objects and interval objects;
connecting different simulation finger bar objects according to a preset electrical rule to obtain a plurality of simulation resonator objects, and calculating an electrical response parameter of each simulation resonator object;
connecting different simulation resonator objects with a circuit matching element object according to a preset electrical rule to obtain a simulation filter unit, and calculating the overall electrical response parameters of the simulation filter unit according to the electrical response parameters corresponding to the simulation resonator objects used in connection;
coupling the simulation filter unit with a scattering matrix of the radio frequency front end object according to a preset electrical rule to obtain a physical simulation result of a simulation radio frequency front end module formed by the simulation filter unit.
2. The SAW physical simulation method of claim 1 wherein the predetermined spatial location is a spatial location at which the basic parameters constituting the finger object are determined based on physical characteristics of the electrode object, the reflecting grating object, and the spacer object.
3. The SAW physical simulation method of claim 1, wherein the preset electrical rule is a circuit connection mode for determining the simulated resonator object, the simulated filter element, and the simulated rf front end module according to physical characteristics of the simulated finger object, the simulated resonator object, and the circuit matching element object, or the simulated filter element and the rf front end object.
4. The method of SAW physical simulation of claim 1, wherein the simulated resonator object comprises an IDT object and a DMS object.
5. The method of SAW physics simulation of claim 1, wherein the circuit matching element objects comprise capacitive objects, inductive objects, and circuit simulation objects embodying physical characteristics of circuit elements.
6. The method of SAW physics simulation of claim 1, wherein the radio frequency front end object comprises a switch object, an amplifier object, a low noise amplifier object.
7. A SAW physical simulation system, comprising:
the basic parameter setting module is used for determining basic parameters of the finger strip, wherein the basic parameters comprise geometric parameters, material parameters, adjustment parameters and intermediate variables;
the finger setting module is used for constructing different simulation finger objects according to the basic parameters and preset space positions, wherein the simulation finger objects comprise electrode objects, reflecting grating objects and interval objects;
the resonator setting module is used for connecting different simulation finger bar objects according to a preset electrical rule to obtain a plurality of simulation resonator objects, and calculating the electrical response parameter of each simulation resonator object;
the filter setting module is used for connecting different simulation resonator objects with the circuit matching element object according to a preset electrical rule to obtain a simulation filter unit, and calculating the overall electrical response parameters of the simulation filter unit according to the electrical response parameters corresponding to the simulation resonator objects used for connection;
and the module simulation module is used for coupling the simulation filter unit with the scattering matrix of the radio frequency front end object according to a preset electrical rule to obtain a physical simulation result of the simulation radio frequency front end module formed by the simulation filter unit.
8. A computer device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps in the method of SAW physics simulation as claimed in any one of claims 1 to 6 when the computer program is executed.
9. A computer readable storage medium, having stored thereon a computer program which when executed by a processor performs the steps in the SAW physical simulation method of any one of claims 1 to 6.
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| CN202211107089.2A CN115470735B (en) | 2022-09-09 | 2022-09-09 | SAW physical simulation method, system and related equipment |
| PCT/CN2023/109764 WO2024051379A1 (en) | 2022-09-09 | 2023-07-28 | Saw physical simulation method and system, and related device |
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| CN116070585B (en) * | 2023-03-14 | 2023-06-13 | 深圳飞骧科技股份有限公司 | Thermal simulation method, system and related equipment of filter module |
| CN116205187B (en) * | 2023-04-28 | 2023-08-15 | 深圳飞骧科技股份有限公司 | Rapid simulation method, system and related equipment for multi-symmetrical surface acoustic wave device |
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| CN116341342B (en) * | 2023-05-31 | 2023-09-12 | 深圳飞骧科技股份有限公司 | Grid matrix generation method, system and related equipment for finite element simulation |
| CN116401964B (en) * | 2023-06-08 | 2023-09-29 | 深圳飞骧科技股份有限公司 | Method, system and related equipment for acquiring simulation parameters of elastic wave device |
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| WO2024051379A1 (en) | 2024-03-14 |
| CN115470735A (en) | 2022-12-13 |
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