Once the blocks are in place, the next step is to define the tasks. These can be connected together with models from other CST modules and from tools such as IBIS and SPICE to form systems for circuit simulation, or converted with a single button press into a combined 3D model for full-wave simulation. To make it easier to build up the system, the library of RF and microwave ‘blocks’ in CST DESIGN STUDIO™ has been enlarged to include more components such as amplifiers, couplers and waveguide elements. These workflow cycles allow effects such as heating, thermal expansion and Lorentz forces to be fed back into the EM field solvers, making it easier to analyze applications such as filters and cavities which can be very sensitive to deformation. The flexible configuration of the workflow sequence allows the user to easily define both simple simulation series and more complex nested workflows including feedback. And as we stated earlier, this blog will cover the hardware aspect.Figure 1 The surface current distribution on a blade antenna (a), and the equivalent near field source (blue box) representing the antenna on a vehicle (b).Īt its core, SAM is built on two ideas: breaking down complex systems into individual elements, and splitting the simulation workflow into a set of fundamental tasks to be carried out automatically. Simulation acceleration can be broken into two groups: software acceleration and hardware acceleration. Depending on the method used, different acceleration techniques can be employed to make the simulation run faster. Typical simulations are run on servers or workstation machines because they are more powerful. Postprocessing is done on the CPU after the solution is obtained, where the user further process the standard results to get something more meaningful. Processing is done using either the CPU or the Graphics Processing Unit (GPU), solving the underlying Maxwell’s Equations to give us the solution. This part is done using the Central Processing Unit (CPU). Preprocessing is to set up the problem, including discretizing the simulation domain and defining the excitations and boundary conditions. Before we delve into the focus of our post, it is relevant to explain that electromagnetic simulation processing can be broken into three parts: preprocessing, processing (solver run), and postprocessing.
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