Tailoring Group Delay Dispersion of Spatial Phaser using Anisotropic Metasurface and Polarized Incident Waves
Sign Up to like & getrecommendations! Published in 2023 at "Advanced Optical Materials"
DOI: 10.1002/adom.202202844
Abstract: Metasurface‐based spatial phaser, exhibiting dispersive group delay responses, is able to perform real‐time analogue signal processing on the temporal spectrum of spatial electromagnetic waves, e.g., Fourier transformation, pulse chirping, pulse spread, and compression. The functionality… read more here.
Keywords: dispersion; spatial phaser; group delay; phaser ... See more keywords
Group Delay Dispersion Measurements on Mid‐Infrared Supermirrors
Sign Up to like & getrecommendations! Published in 2025 at "Advanced Optical Materials"
DOI: 10.1002/adom.202500727
Abstract: Methods and results for broadband group delay dispersion measurements of monocrystalline and amorphous‐crystalline hybrid supermirrors, as well as an all‐amorphous mirror, are presented. Measurements are performed with a custom‐built white light interferometer covering a spectral… read more here.
Keywords: delay dispersion; dispersion measurements; group delay;
A negative group delay rectangular waveguide based on corrugated tantalum nitride slow wave structure
Sign Up to like & getrecommendations! Published in 2023 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.33695
Abstract: In this letter, a rectangular waveguide with controlled negative group delay (NGD) is proposed. The equivalent circuit of the structure is proposed and analyzed. The NGD value and NGD center frequency can be adjusted continuously… read more here.
Keywords: structure; negative group; rectangular waveguide; group ... See more keywords
Self‐equalized linear‐phase microstrip bandpass filter based on negative group delay parallel‐coupled three‐line units
Sign Up to like & getrecommendations! Published in 2024 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.34100
Abstract: A self‐equalized linear‐phase microstrip bandpass filter (BPF) utilizing negative group delay (NGD) parallel‐coupled three‐line (PCTL) units is presented in this letter. The NGD PCTL unit possesses an NGD valley in its frequency response of group… read more here.
Keywords: line; line units; group delay; linear phase ... See more keywords
An epsilon‐near‐zero circuit based on half‐mode SIW with enhanced integrability for applications of narrowband large group delay
Sign Up to like & getrecommendations! Published in 2024 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.34323
Abstract: The tunneling effect of an epsilon‐near‐zero (ENZ) is exploited to fulfill a narrowband large group delay by using a compact half‐mode substrate integrated waveguide structure built on thin substrate. The ENZ channel possesses a finite… read more here.
Keywords: group delay; epsilon near; group; near zero ... See more keywords
Log‐periodic antenna effect on modulated signals in regions of negative group delay
Sign Up to like & getrecommendations! Published in 2024 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.34337
Abstract: In frequency regions where ultra‐wide band log‐periodic antennas exhibit negative group delay (NGD), the effect of higher‐order modes upon amplitude‐modulated signals is examined using convolution theory. It is shown that in these frequency regions, the… read more here.
Keywords: modulated signals; effect; group delay; negative group ... See more keywords
Elementary Negative Group Delay Filter Functions
Sign Up to like & getrecommendations! Published in 2024 at "Circuits, Systems, and Signal Processing"
DOI: 10.1007/s00034-024-02647-9
Abstract: A theoretical study of the behavior of some elementary first- and second-order functions, which are suitable for realizing negative group delay, is performed in this work. As both the gain and phase responses are simultaneously… read more here.
Keywords: filter; elementary negative; negative group; group delay ... See more keywords
Melody extraction from music using modified group delay functions
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Speech Technology"
DOI: 10.1007/s10772-017-9397-1
Abstract: Modified group delay based algorithms for estimation of melodic pitch sequences from heterphonic/polyphonic music are discussed in this paper. Two different variants of the modified group delay function are proposed, namely, (a) system based—MODGD (Direct)… read more here.
Keywords: melody extraction; group delay; group; modified group ... See more keywords
Optical solitons with differential group delay and weak non-local nonlinearity by extended trial function method
Sign Up to like & getrecommendations! Published in 2018 at "Optik"
DOI: 10.1016/j.ijleo.2018.04.005
Abstract: Abstract This paper studies optical soliton solutions with differential group delay and non-local nonlinearity. The extended trial function approach retrieves bright and singular soliton solutions to the model. The existence criteria for these solitons are… read more here.
Keywords: non local; group delay; extended trial; differential group ... See more keywords
Optical soliton perturbation with differential group delay and parabolic law nonlinearity using exp(−ϕ(ξ))-expansion method
Sign Up to like & getrecommendations! Published in 2018 at "Optik"
DOI: 10.1016/j.ijleo.2018.07.086
Abstract: Abstract In this study, soliton solutions with differential group delay, having parabolic law nonlinearity, are constructed. The exp(−ϕ(ξ))-expansion method has been utilized. Additional solutions, including plane wave solutions and periodic singular waves naturally emerge from… read more here.
Keywords: delay parabolic; group delay; law nonlinearity; differential group ... See more keywords
Optical solitons with differential group delay for coupled Kundu–Eckhaus equation using extended simplest equation approach
Sign Up to like & getrecommendations! Published in 2020 at "Optik"
DOI: 10.1016/j.ijleo.2019.164051
Abstract: Abstract The extended simplest equation approach is implemented to secure soliton solutions, having differential group delay, for Kundu–Eckhaus equation in presence of four-wave mixing terms. The algorithm also lists additional solutions that emerge from the… read more here.
Keywords: group delay; differential group; simplest equation; equation approach ... See more keywords