Origami-based microwave absorber with a reconfigurable bandwidth

Abstract

Reconfigurability is critical for the research fields in electromagnetics, mechanics, and acoustics, due to the controllability of functionalities. This Letter numerically and experimentally demonstrates an origami-based absorber with a reconfigurable bandwidth. The proposed structure provides four transformable models: flat sheet, single-arch-folded, double-arch-folded, and U-shaped strips filled, corresponding to the performance of nearly no absorption, one-peak absorption, two-peak absorption, and ultra-broadband absorption (3.4–18 GHz), which clearly demonstrates the bandwidth-enhancement effect. In contrast with the traditional structural absorbers, the transformable flat sheet and U-shaped strips are obtained by three-dimensional printing, which exhibits an obvious superiority in prototype fabrication. These results provide a feasible strategy for energy dissipation and origami transformation.

Metamaterial Absorbers: From Tunable Surface to Structural Transformation

“…With the shape transformation (i.e., origami or kirigami), the EM properties of the MAs can be tailored effectively and directly. [39,[97][98][99][100][101] Due to the emerging unique tuning mechanism as well as simple fabrication, the structural transformation-based technique has been a topic of great interest in tunable/reconfigurable MAs.…”

“…Instead of using metallic resonators, Chen et al demonstrated an origami-based MA, which had been achieved through 3D printing of lossy conductive poly(lactic acid) (PLA). [39] The printed PLA sheet could be folded to transform different shapes, providing four models including flat sheet, single-arch-folded, double-arch-folded, and U-shaped strips. As a result, multifunctional microwave absorbers were obtained to offer switchable performance from nearly zero absorption to near-unity, dual-band, and ultra-broadband [96] Copyright 2018, The Authors, published by Hindawi.…”

“…[18,[32][33][34][35][36][37] Driven by the high demand of tunable/reconfigurable MAs in practical applications, tremendous efforts have been devoted to finding appropriate strategies, materials, and techniques for effectively controlling active components to achieve the desired properties and functions. [38][39][40][41][42][43][44] Meanwhile, substantial progress has also been achieved in tunable/reconfigurable MAs in the past two decades. In addition to the above numerous research progress, many reviews have also been reported regarding tunable/reconfigurable MAs.…”

Triple-Band Square Split-Ring Resonator Metamaterial Absorber Design with High Effective Medium Ratio for 5G Sub-6 GHz Applications

“…The authors of [ 29 ] present an inkjet-printed PET substrate-based broadband MMA (1.0–4.5 GHz). An origami-based microwave absorber is presented in [ 30 ] for reconfigurable absorption bandwidth from 3.4 to 18 GHz frequency. Besides the triple absorption band, MMAs are offered in [ 31 , 32 , 33 , 34 , 35 ] with various patch designs.…”

Multiband-switchability and high-absorptivity of a metamaterial perfect absorber based on a plasmonic resonant structure in the near-infrared region

“…The unitary structure of the MDM absorber, also known as a meta-atom, primarily has a regular and simple geometry, including squares, 16 rectangles, 17 crosses 18 and circles. 19 So far, the studies on these absorbers have extended to various wavelength bands, such as microwave, 20,21 terahertz, [22][23][24][25] long-wave infrared, 26 mid-wave infrared 27 and visible-nearinfrared bands. 28 It is worth mentioning that Karmakar et al 25 designed a metamaterial refractive index sensor by making use of the tuning effect of Fano resonance in the THz band in a geometrically symmetric stacked metamaterial.…”