Abstract
The origami structure has caused a great interest in the field of engineering, and it has fantastic applications in the deployable and reconfigurable structures. Owing to the unique multi-stable states, here a typical hexagon-twist origami structure is fabricated via multi-material printing technology. The printed structure has multi-stable features and the stiffness of the deformable structure is dramatically reduced under thermal triggering. Such behavior causes an increase in the structural degree of freedom, allowing for self-deployment via releasing the prestored energy in the elastic crease. The response time and reaction time of the self-deployment process are also studied and illustrate the higher energy barrier of the folded state, the longer self-deployment time. Utilizing such unique features and design principles, a prototype of frequency reconfigurable origami antenna of nine diverse operating modes is subsequently designed and assembled with the hexagon-twist origami structure as the dielectric substrate. The antenna implements the cross-band from two different frequency bands, enabling to realize frequency reconfigurable under thermal condition.
Highlights
Origami is an ancient oriental art and an emerging frontier science
In order to explore the mechanical principle of selfdeployment behavior, it was necessary to analyze the thermodynamic behavior of the TG and VW material via dynamic mechanical analysis (DMA)
In order to further research the influence of the key geometric parameters of the origami structure on its self-deployment behavior, the self-deployment behavior of stable state A, state B, and state C with varies geometry size under the 65°C water bath condition was studied
Summary
Origami is an ancient oriental art and an emerging frontier science. It is in the intersecting fields of mathematics, mechanics, mechanics, materials, control, biology, medicine and other basic disciplines, resulting in many scientific applications, such as solar panels design, airbag structure, and even the spatial folding of biological macro-molecules such as DNA and proteins (Xie, 2010; Leng et al, 2011; Fernandes and Gracias, 2012; Hu et al, 2012; Felton et al, 2014; Ge et al, 2014; Gladman et al, 2015; Zhao et al, 2015; Li et al, 2017; Zhao et al, 2017). Origami technology has always been regarded as a means of developing deployable and reconfigurable engineering systems because of its characteristics of easy bending and twisting (Anfinsen et al, 1973; Bromberg and Ron, 1998; Li and Lewis, 2003; Ahn et al, 2010; Lu et al, 2010b; Leng et al, 2011; Erb et al, 2012; Ge et al, 2012; Ge et al, 2013; Therien-Aubin et al, 2013; Tibbits, 2014; Breger et al, 2015; Gladman et al, 2015; Luo et al, 2015; Mu et al, 2015; Su et al, 2018) This technology can be used in designing largescale planar structures such as building structures (Overvelde et al, 2016; Faber et al, 2018), and. In order to reduce electromagnetic coupling and system weight, the frequency reconfigurable antenna that can replace the function of multiple antennas with one antenna has become a research hotspot for engineers and scientists (Li et al, 2014; Song et al, 2017)
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