变形
刚度(电磁)
数码产品
材料科学
铰链
制作
稳健性(进化)
结构刚度
天线(收音机)
柔性电子器件
导电体
计算机科学
机械工程
光电子学
电气工程
工程类
电信
结构工程
医学
生物化学
化学
替代医学
病理
复合材料
计算机视觉
基因
作者
Sung Yong Park,Eiyong Park,Minjae Lee,Sungjoon Lim
标识
DOI:10.1021/acsami.3c11425
摘要
The rapid development of four-dimensional (4D) printing technology has resulted in its application in various fields, including radiofrequency (RF) electronics. Moreover, because origami-inspired RF electronics provide a physically deformable geometry, they are good candidates for reconfigurable RF applications. However, previous origami-inspired RF electronics have generally been fabricated on paper for easy folding and unfolding. Although this facilitates easy fabrication, the resultant structures suffer from a lack of rigidity and stability. In this paper, we propose a 4D-printed multimaterial Miura origami structure for RF spectrum applications. For thermal actuation and robustness, the proposed structure consists of high-temperature durable cores with shape memory polymer (SMP) hinges. The high-temperature durable cores provide rigidity to the desired part and reduce the level of distortion of the conductive pattern, while the SMP hinges enable shape morphing. To demonstrate the feasibility of the technique for RF electronics, a shape-morphing pattern reconfigurable antenna array is designed at 2.4 GHz using the proposed 4D-printed multimaterial structure. Through numerical and experimental demonstrations, the proposed antenna's maximum beam direction is changed from 0° to 50° by thermally morphing the Miura origami. In addition, the antenna successfully recovers to its memorized original state.
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