Results 311 to 320 of about 737,986 (350)

Plasma frequency selective surfaces

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2014
Plasma frequency selective surfaces (FSS) [1]-[2] use plasma instead of metal for the FSS elements. Frequency selective surfaces have been used for filtering electromagnetic waves and Munk [3] wrote a comprehensive book on the subject. In conventional metal FSS, each layer has to be modeled using numerical methods and the layers are stacked in such a ...
openaire   +1 more source

Infrared frequency selective surfaces

IEEE Antennas and Propagation Society Symposium, 2004., 2004
A frequency selective surface (FSS) is designed and fabricated to resonate in the infrared. The FSS is designed via periodic method of moments (PMM) software and is based on circuit-analog resonance of square loop elements. The lithographically composed FSS resonates at the absorption of infrared radiation.
Monacelli, Brian, Boreman, Glenn, Pryor, Jonothan, Munk, Ben A., Kotter, Dale   +4 more
openaire   +2 more sources

Thick frequency selective surfaces

IEEE Antennas and Propagation Society International Symposium 1992 Digest, 1992
As an additional means of controlling bandwidth, the use of periodic screens in free space with thick metallization was investigated for single-square loop and double-concentric-square loop elements. These loops elements were chosen because the passbands of such screens, with tight lattice spacing, display a remarkable insensitivity to incident ...
D.B. Webb, E. Michielssen, R. Mittra
openaire   +1 more source

Terahertz Frequency Selective Surface

2014
In Chaps. 6 and 8, the application of the frequency selective surfaces (FSS) at the terahertz (THz) frequency has been discussed.
Kumud Ranjan Jha, Ghanshyam Singh
openaire   +1 more source

Active frequency-selective surfaces

IEE Proceedings - Microwaves, Antennas and Propagation, 1996
Two different varieties of active frequency-selective surfaces (FSS) are described. In one type, active FSS elements incorporating switched PIN diodes are discussed. Waveguide simulation studies show that the frequency response of the surface can be electronically switched from that of a reflecting structure to a transmitting structure.
T.K. Chang, R.J. Langley, E.A. Parker
openaire   +1 more source

Active frequency selective surfaces

SPIE Proceedings, 2013
Split ring resonator arrays are investigated for use as active elements for the realization of voltage controllable frequency selective surfaces. Finite difference time domain simulations suggest the absorptive and reflective properties of such surfaces can be externally controlled through modifications of the split ring resonator gap impedance.
Walter R. Buchwald, Joshua Hendrickson, Justin W. Cleary, Junpeng Guo   +3 more
openaire   +1 more source

Frequency tunable and high selective frequency selective surfaces for Ku-band

2020 IEEE Asia-Pacific Microwave Conference (APMC), 2020
In this paper, a tunable frequency-selective surface based on liquid crystal materials in the Ku band is proposed. The frequency selective surface is based on the aperture coupling structure, and has a narrow bandwidth and high selectivity. There are two transmission zeros on both sides of the transmission passband, and the tuning range reaches 13.4%.
Di Jiang, Xiaoyu Chen, Jie Zhuang, Puhang Ran, Xiaoyu Li   +4 more
openaire   +1 more source

Frequency Selective Surfaces for the RCS reduction of low frequency antennas

2006 First European Conference on Antennas and Propagation, 2006
This paper describes the design and measurement of a two-layers gangbuster Frequency Selective Surface (FSS). The FSS is aimed to limit the RCS of the compartment of a ship?s mast housing telecommunication antennas and should guarantee a pass-band at low frequencies, in the operating band of the antennas, while reflecting the incoming signal at higher ...
Monni, S., Gerini, G., Neto, A.
openaire   +2 more sources

Plasma frequency selective surface for GNSS applications

2017 25th Telecommunication Forum (TELFOR), 2017
We propose a low-cost and reconfigurable plasma frequency selective surface (PFSS) with fluorescent lamps for Global Navigation Satellite System (GNSS) applications. Although many antenna topologies exist for broadband operation, antennas with plasma frequency selective surfaces are limited and offer certain advantages. Especially for GNSS applications,
Yigit O., Yegin K., Akkaya I., Ozturk Y.
openaire   +3 more sources

Frequency selective surfaces

1977 Antennas and Propagation Society International Symposium, 2005
T. Leonard, L. Young
openaire   +1 more source