It is simulated in CST Microwave Studio using the Frequency Domain Solver (F-solver) and Unit cell boundary condition (Floquet mode analysis). To start the FSS design, I consider a hexagonal lattice based unit cell of a dielectric filled by a metallic disk at center as depicted in Figure 1.
CST Studio Suite finds transmission and reflection between the Floquet modes and other ports (excitations) existing in the model. The second approach is based on the Floquet theorem in which different so-called “ Floquet modes” for the desired periodic structures are considered and excited. One is eigenvalue problems for which Eigenmode Solver should be used to obtain standard results such as dispersion diagrams including bandgaps and light line curves. ĬST Studio Suite can tackle the periodic structures using two general approaches. The latter can be used as a potential approach to obtain customized frequency filtering radomes for antenna applications. Metamaterials, artificial magnetic conductors, and Frequency selective surfaces (FSS) are few examples of applications based on periodic structures. Periodic structures often exhibit interesting electromagnetic behaviors. I will discuss the workflow that brings us from an individual element to the finite array as well as suitable approaches to simulate them.
The efficient simulation of periodic structures and their application in radome design are the focal points of today’s blog.
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