COMPACT ELECTROMAGNETIC ABSORBERS FOR FREQUENCIES BELOW 1 GHz

TL;DR: In this paper , a broadband metamaterial absorber (MA) structure for UHF band was proposed, and the miniaturization of the unit was realized by combining the method of bending metal wires and loading metal vias.

Abstract: A multifunctional metasurface with integrated absorption and polarization rotation is proposed and investigated. The unit cell is composed of a cross arrow in the middle and a square loop on the outside loaded with four-sided lumped resistors. The absorption is mainly achieved by the outside resistor-loaded loop, and the polarization rotation is obtained in virtue of the combination of the outside loop and the central asymmetric structure. Simulated results show that the proposed metasurface obtains a polarization-insensitive absorption from 4.2 GHz to 5.0 GHz, a wideband linear-to-linear polarization rotation from 11.65 GHz to 16.10 GHz and a linear-to-circular polarization rotation from 17.7 GHz to 20 GHz. To verify the design, the proposed metasurface is fabricated and measured. The experimental results agree well with the simulated results.

TL;DR: In this article, a novel frequency selective surface (FSS) is proposed for the design of polarization-insensitive metamaterial absorbers that operate around 1 GHz, where the first resonances of small commercial enclosures take place.

TL;DR: In this article, the authors proposed an approach to reduce the cavity resonant edge effects in printed circuit boards (PCBs) and semiconductor packages by using absorbing material and decoupling capacitors (de-caps).

TL;DR: In this article, the authors present a comparison of band-pass and Dichroic filter designs for one and two-dimensional periodic structures, and present an overview of the current state-of-the-art.

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TL;DR: In this paper, the basic structure of Periodic Structure Single Screen FSS Analyses Cascading of Multi-Screen FSS Multi-Band FSS Bandpass Radome FSS Materials and Fabrication Active Beam Control Arrays Quasi-Optical Grid Arrays