We report on the fabrication of crossed-dipole resonant filters by direct-write electron-beam and nanoimprint lithographies. Such structures have been used as spectrally selective components at visible, microwave, and infrared wavelengths. Imprinting is accomplished in a modified commercial hot press at 155 °C. The replica is then etched in oxygen plasma and developed in chlorobenzene to select...

A single substrate layer double metallic plane frequency selective surface (FSS) is designed with miniaturized electrical elements and two tunable pass-bands enabling Wireless Local Area Network applications. Each FSS periodic cell consists of a metallic square loop on the top metal layer and its complementary etched on the bottom metal layer separated by a thin dielectric layer. This designed ...

Abstract—Tunable frequency selective surfaces (FSSs) based on split ring resonators (SRRs) are presented. Tuning performance is achieved by means of several on/off switches placed between the rings of each SRR element. The band-stop FSS response is dynamically tuned to different frequency bands at different switching states. In addition, loadings placed at the corners of outer ring elements, fo...

Switchable metamaterials offer unique solutions for efficiently manipulating electromagnetic waves, particularly for terahertz waves, which has been difficult since naturally occurring materials rarely respond to terahertz frequencies controllably. However, few terahertz modulators demonstrated to date exhibit simultaneously low attenuation and high modulation depth. In this letter we propose a...

This paper deals with the theoretical investigation on size reduction and wideband operation of Frequency Selective Surface (FSS). The modified FSS has an excellent angular stability performance. The compactness has been achieved by etching out unique types of slot from Square shaped patch. Gradually the dimensions of the slots are modified. At last, in Proposed FSS the size reduction is achiev...

Abstract The use of frequency selective surfaces (FSSs) defined on railcar windows with a metallic low-e coating to improve the reception mobile communications signals is becoming ever more common. proximity glass passenger in this scenario has introduced new parameter consider, aesthetics. This paper presents complete study development FSS by laser ablation, considering all current requirement...

This paper presents a novel three-dimensional active frequency selective surfaces loading a varactor diode to achieve electrically controllable, by loading different values of paranoid voltage to control the variable capacitance diode. Simulation results show that the structure has excellent resonant characteristics in the range of 3.34GHz-1.59GHz, and has certain sensitivity for the change of ...

In this paper, we propose a novel algorithm to compute the radiation pattern of slot array antenna covered with frequency selective surfaces (FSS) based on ray tracing technique. We observed that proposed could greatly reduce computational resources while yielding accurate numerical solution, compared cases taking standard full-wave and conventional high-frequency approaches (summarized in Tabl...

Introduction: Frequency selective surfaces (FSS) are based on metallic resonator arrays with tailored transmittance and reflectivity properties [I]. Recently, it has been proposed in a numerical study to use THzFSS based on asymmetric split ring resonators as a sensor for detecting biomolecular sample films with a thickness of only 10 nm [2]. Because large biomolecules, e.g. DNA, exhibit a mult...