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In this paper, a mechanically reconfigurable frequency selective surface (RFSS) based on a rotating Kirigami structure is proposed. The proposed RFSS consists of two parts: a rotating Kirigami substrate and a conductive ring adhered to the substrate. The resonant frequencies of the RFSS are tuned by adjusting the angle between the squares of the rotating Kirigami substrate. Electromagnetic simulation results show that the RFSS can achieve continuous frequency tuning from 14.73 GHz to 16.1 GHz. The tuning mechanism of RFSS is analyzed by developing an equivalent circuit model. To validate our findings further, we fabricated an RFSS prototype using 3D printing technology and conducted measurements, which showed good agreement with the simulation results.
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http://dx.doi.org/10.1364/OE.555432 | DOI Listing |
Opt Express
April 2025
In this paper, a mechanically reconfigurable frequency selective surface (RFSS) based on a rotating Kirigami structure is proposed. The proposed RFSS consists of two parts: a rotating Kirigami substrate and a conductive ring adhered to the substrate. The resonant frequencies of the RFSS are tuned by adjusting the angle between the squares of the rotating Kirigami substrate.
View Article and Find Full Text PDFCyborg Bionic Syst
June 2025
SDU Soft Robotics, Biorobotics Section, The Maersk McKinney Moller Institute, University of Southern Denmark, Odense 5230, Denmark.
Limbless creatures can crawl on flat surfaces by deforming their bodies and interacting with asperities on the ground, offering a biological blueprint for designing efficient limbless robots. Inspired by this natural locomotion, we present a soft robot capable of navigating complex terrains using a combination of rectilinear motion and asymmetric steering gaits. The robot is made of a pair of antagonistic inflatable soft actuators covered with a flexible kirigami skin with asymmetric frictional properties.
View Article and Find Full Text PDFPhys Rev Lett
May 2025
McGill University, Department of Mechanical Engineering, Montréal, Québec H3A 0C3, Canada.
Kirigami metamaterials have enabled a plethora of morphing patterns across art and engineering. However, the inverse design of kirigami for complex shapes remains a puzzle that so far cannot be solved without relying on complex numerical methods. Here, we present a purely geometric design method to overcome the reliance on sophisticated numerical algorithms and showcase how to leverage it for three distinct types of morphing targets, i.
View Article and Find Full Text PDFSci Adv
May 2025
Department of Mechanical Engineering, McGill University, Montreal, H3A 2K6, Canada.
A closed surface is generally more resistant to deformation and shape changes than an open surface. An empty closed box, for example, is stiffer and more stable than when it is open. The presence of an opening makes it less constrained, more deformable, and easier to morph, as demonstrated by several studies on open-surface morphing across patterns, materials, and scales.
View Article and Find Full Text PDFNat Commun
February 2025
Department of Materials Science, Fudan University, Shanghai, 200438, People's Republic of China.
Dynamically controlling electromagnetic waves at will is highly desired in many applications, but most previously realized mechanically reconfigurable metasurfaces are of restricted wave-control capabilities due to the limited tuning ranges of structural properties (e.g., lattice constant or meta-atoms).
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