Results 31 to 40 of about 737,986 (350)
Finite frequency selective surface modelling
The 8th European Conference on Antennas and Propagation (EuCAP 2014), 2014 In this paper we describe the development of an electromagnetic modelling technique to investigate edge illumination effects on finite size FSS performance. The work extends the commonly used unit cell approach and models the FSS as a linear array with Gaussian beam excitation.
Dickie, Raymond +2 more
openaire +3 more sources
A High-Selective Frequency Selective Surface With Hybrid Unit Cells
IEEE Access, 2018 In this paper, a novel frequency selective surface (FSS) is proposed. It has two metal layers and the configurations of the unit cells of these two layers are different, so-called hybrid unit cells. The designed FSS has three transmission zeros and steep
Yuhong Ma +4 more
doaj +1 more source
Convoluted double square: single layer FSS with close band spacings [PDF]
, 2000 A novel element provides reflection band ratios as low as 1.1. It is derived from the double square but is less demanding on printing definition. Together, the two elements offer increased flexibility in Frequency selective surface design for close band ...
Batchelor, John C. +2 more
core +1 more source
Frequency Selective Surface-Based Switched-Beamforming Antenna
IEEE Access, 2018 A novel switched-beamforming antenna designed using active frequency selective surfaces (AFSS) is presented. The antenna consists of two parts: a source with an omnidirectional radiation pattern and a novel active triangular frequency selective surface ...
Ghada Hussain Elzwawi +3 more
doaj +1 more source
Traditional Frequency Selective Surface versus Substrate Integrated Waveguide Frequency Selective Surface [PDF]
Universal Journal of Communications and Network, 2014 This paper is devoted to analysis design and fabrication of both traditional and substrate integrated waveguide (SIW) frequency selective surfaces (FSS) of square elements and square lattice. The transmission loss is studied for different angle of incidence; normal, thirty, forty five and sixty degrees.
I. El-Mongy, A. M. M. A. Allam
openaire +1 more source
Realization of a semiconductor-based cavity soliton laser [PDF]
, 2007 The realization of a cavity soliton laser using a vertical-cavity surface-emitting semiconductor gain structure coupled to an external cavity with a frequency-selective element is reported.
F. W. Wise +8 more
core +2 more sources
3D Absorptive Frequency-Selective Reflection and Transmission Structures With Dual Absorption Bands
IEEE Access, 2018 This paper presents a 3D absorptive frequency-selective reflection structure (AFSR) and absorptive frequency-selective transmission structure (AFST) with one reflection/transmission band and two absorption bands.
Yufeng Yu +6 more
doaj +1 more source
Novel 4‐bit second‐order multifunction frequency selective surface
IET Microwaves, Antennas & Propagation, 2021 An innovative four‐bit second order multifunction active frequency selective structure controlled via four PIN diodes with nine different combinations is introduced . The proposed design is equipped with electromagnetic switching, frequency switching and
Gulab Shah +3 more
doaj +1 more source
Drifting instabilities of cavity solitons in vertical cavity surface-emitting lasers with frequency selective feedback [PDF]
, 2009 In this paper we study the formation and dynamics of self-propelled cavity solitons (CSs) in a model for vertical cavity surface-emitting lasers (VCSELs) subjected to external frequency selective feedback (FSF), and build their bifurcation diagram for ...
Colet, P. +5 more
core +2 more sources
A single-layer tuneable microwave absorber using an active FSS [PDF]
, 2004 An experimental single-layer active microwave absorber in described. The absorber is a planar structure based upon the topology of a Salisbury screen, but in which the conventional resistive layer is replaced by an active frequency selective surface (FSS)
Chambers, B., Tennant, A.
core +1 more source