Related Experiment Video
Updated: Jun 12, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
Impedance-gradient control in 2D-3D hybrid metamaterial for broadband microwave absorption and low infrared emission
Abstract:
Multispectral stealth is moving from single-band suppression to coordinated multispectral control, yet achieving broadband microwave absorption with low infrared emissivity remains difficult. This work proposes a 2D-3D hybrid metastructure consisting of five impedance-graded resistive-film layers and an indium tin oxide (ITO) low-emissivity frequency selective top layer. Simulations show -10 dB reflection loss from 1.96-91.98 GHz, and measurements confirm 1.89-40 GHz absorption with -15 dB bands at 2.12-2.84 and 6.93-35.92 GHz, stable at 30° incidence. The average emissivity is 0.298 over 3-14 μm. Theoretically, this work derives the square column filling factor for the cross-honeycomb geometry, combining it with the Hashin-Shtrikman upper bound to establish an accurate five-layer uniform equivalent medium model aligned with full-wave simulations.
Related Concept Videos
Mesh Analysis for AC Circuits
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
Impedances and Admittance
Impedance is a measure of resistance to sinusoidal current flow in an AC circuit. Unlike their behavior in DC circuits, where inductors appear as short circuits and capacitors as open circuits, the behavior of these components in AC...
IR Absorption Frequency: Hybridization
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that stretch at a...
Biasing of Metal-Semiconductor Junctions
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
Impedance Combination
