Abstract
Frequency selective surfaces (FSSs) have been used to control and shape electromagnetic waves. Previous design approaches use complex geometries that are challenging to implement. With the purpose to transform electromagnetic waves, we morph the shapes of FSS designs based on origami patterns to attain new degrees of freedom and achieve enhanced electromagnetic performance. Specifically, using origami patterns with strongly coupled electromagnetic resonators, we transform a single-band FSS to a dual-band FSS. We explain this transformation by showing that both symmetric and anti-symmetric modes are excited due to the strong coupling and suitable orientation of the elements. Also, our origami FSS can fold/unfold thereby tuning (i.e., reconfiguring) its dual-band performance. Therefore, the proposed FSS is a dynamic reconfigurable electromagnetic structure whereas traditional FSSs are static and cannot change their performance.
Highlights
Origami is the art of paper folding that can transform planar sheets to 3D geometries, and it has recently inspired scientists and engineers in different disciplines
Frequency selective surfaces (FSSs) are spatial filters comprised of periodically organized electromagnetic elements that are strongly coupled
We reveal a new phenomenon, but we prove that enhanced electromagnetic performance can be achieved by utilizing an origami configuration with appropriately oriented electromagnetic resonators
Summary
Origami is the art of paper folding that can transform planar sheets to 3D geometries, and it has recently inspired scientists and engineers in different disciplines. Londoño et al.[39] proposed a special class of Huygen’s surfaces that is able to manipulate transmitted wave fronts, while exhibiting high transparency over a broad range of frequencies As it can be observed from the aforementioned works, it is highly important to develop FSS designs that operate in multiple frequency bands. Our analysis shows that origami transforms a single-band static FSS to a dynamic dual-band FSS by conforming periodically spaced electromagnetic resonators to a Miura-Ori folding pattern, thereby transforming a traditional single-band FSS to a dual-band one This is an important finding as it proves that by conforming the shape of electromagnetically coupled elements to origami patterns, we can create new transformations of EM waves and develop new FSS designs with enhanced electromagnetic performance. The proposed origami FSS, as it is expected, is a dynamic reconfigurable structure since it can fold/unfold thereby tuning its dual-band performance depending on its folding state
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