Thermal spiral inductor using 3D printed shape memory kirigami

Abstract

Spiral inductors are required to realise high inductance in radio frequency (RF) circuits. Although their fabrication by using micro-electrical–mechanical systems, thin films, actuators, etc., has received considerable research attention, current approaches are both complex and expensive. In this study, we designed and fabricated a thermal spiral inductor by using a three-dimensional (3D) printed shape-memory polymer (SMP). The proposed inductor was inspired by kirigami geometry whereby a two-dimensional (2D) planar geometric shape could be transformed into a 3D spiral one to change the inductance by heating and manually transform. Mechanical and electromagnetic analyses of the spiral inductor design was conducted. Hence, in contrast with the current processes used to manufacture spiral inductors, ours can be realised via a single facile fabrication step.

Potential and applications of auxetic tubular: a review

“…To craft these structures using 3D printing, the process commences with the creation of a 3D model through CAD software. Various types of auxetic structures, such as re-entrant honeycombs [65,66], chiral structures [67], and Kirigami patterns [68], are available. Once the desired structure type is chosen, CAD software facilitates the design of the structure's geometry, including the specifications for individual cell size, shape, and orientation.…”