Designing and analyzing product issues, learning HFSS simulation is very important!

This is also a problem that everyone cares about before learning HFSS. HFSS is a very professional software, so it will definitely not be used like a common software such as word, and it needs a certain professional basic knowledge. The basic knowledge that users need to understand before learning includes: basic microwave technology knowledge, basic theory of electromagnetic fields, and knowledge of S parameters.

Of course, I personally think that since everyone wants to learn HFSS, it is definitely intended to design and analyze a certain type of problem. For example, if you are planning to learn HFSS for designing filters, then you should master the basics of filters; or you are planning to Learning HFSS is used to design antennas, so the basics of antennas should be mastered. This is enough. You don't have to worry about learning the basics. Open HFSS and use it boldly. The so-called practice knows the truth. In the process of using it, you can find some operations or settings that you don’t understand. Targeted to see the relevant basic knowledge, the effect will be better. If you learn the basics in order to learn the basics, there are often too many things to learn, and I don't know where to start. Borrow a message from Nike: "Just do it!"

There is another problem. Since HFSS uses the finite element algorithm (FEM), does the user need to learn the knowledge of finite element algorithms before using HFSS? My opinion is that you don't have to learn. HFSS completely encapsulates the algorithm. The user interface is completely out of reach. All the user needs to do is set a few related parameters, and then the rest is completely done by the software. Of course, during the learning process, the user can spend 1-2 hours to simply look at the electromagnetic finite element algorithm, which can help to understand the setting of some related parameters in the HFSS solution setting item.

The current HFSS uses a standard Windows graphical user interface, the interface is still quite friendly, and it won't be too difficult to learn. To learn HFSS, we must first understand the design analysis process of HFSS. The HFSS design process can be summarized as: Select Solver Type → Create Design Model → Assign Boundary Condition and Port Excitation → Solve Settings → Run Simulation Analysis → Data Post Processing to view the analysis results. There is also an Optimetrics module in HFSS that enables parametric scan analysis and optimized design.

At the beginning of the study, you can first find an example, follow the cat painting tiger to do it twice; or find a complete video course, look at it from beginning to end; this process, there is no understanding of the place does not matter, do not understand the problem put aside , insist on reading. The goal of this initial process was to establish a general understanding of HFSS and to build a simple understanding of the HFSS design process.

After having an overall understanding of HFSS and a brief understanding of the entire design process of HFSS, let's take a closer look at the specific operations, specific settings, and how to set up and operate each step in the design process.

For the solution type, it is necessary to understand the difference and applicable conditions of the Driven Modal, the Driven Terminal and the Eigen Mode.

For the creation of design models, you need to be proficient in the creation of various prototype objects, various modeling operations - such as rotation, copy, move, Boolean operations, etc., as well as the addition and distribution of model materials.

The setting of boundary conditions and port excitation is the key and difficult point of HFSS application and learning; "Boundary condition determination field", correctly understanding and using boundary conditions is the premise of correctly using HFSS simulation to analyze electromagnetic problems; HFSS defines various Boundary conditions, everyone must carefully understand the definition of each boundary, the application and how to use it properly. The understanding and proper setting and use of boundary conditions requires some basic knowledge of electromagnetism. Regarding the setting and use of port excitation, we focus on the two types of excitations, wave port and lumped port. This is the most commonly used type of HFSS. Everyone needs to learn. Understand the similarities and differences between the two. In short, boundary conditions and incentives are the key points and difficulties in HFSS applications. For beginners, more energy is needed to understand the two aspects of knowledge.

For the solution settings, the parameters such as the solution frequency, the sweep frequency range, and the meshing operation are added and set. The solution frequency and sweep frequency range will be related to the actual design; the meshing operation will design some basic concepts of the finite element algorithm, understand the basic concepts of the finite element algorithm, and will help to understand the parameters of the mesh segmentation. .

For the data post-processing part, it is mainly used to view the analysis results after the simulation analysis. When learning, you need to find out which analysis results can be viewed by HFSS, understand the meaning of each analysis result, and how to view the results of the corresponding analysis. .

Finally, regarding the Optimetrics module, which is a tool for optimizing design and parametric sweep analysis in HFSS, the effects of automatic analysis of design model parameters on the performance of the design model can be achieved with the help of the various functions in the Optimetrics module. If the model does not meet the design requirements, find the model parameters that meet the design requirements. To use the Optimetrics module for parametric scan analysis or to optimize the design, you first need to create a parametric model—that is, define a series of variables to represent the size of the model. Therefore, the learning used in this module not only needs to learn the parameter scanning analysis or optimize the relevant settings and usage operations of the design itself, but also the definition and use of learning variables, and the creation of parametric models.