Open AccessBand pattern of commensurate modulated periodic structures
Author(s) -
De Sabata Aldo,
Matekovits Ladislau,
Lipan Ovidiu
Publication year - 2017
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2017.0053
Subject(s) - modulation (music) , dispersion (optics) , waveguide , frequency band , electronic band structure , position (finance) , optics , physics , band gap , materials science , optoelectronics , acoustics , condensed matter physics , telecommunications , engineering , antenna (radio) , finance , economics
Analogies with physical phenomena indicate that modulation of a material or geometrical parameter of a periodic structure enriches its original band structure. The present work aims to provide an insight into the band‐splitting phenomenon in the case of commensurate modulation for a parallel‐plate waveguide technology‐based geometry. A modulated one‐dimensional parallel‐plate waveguide signal integrity structure is numerically analysed to exhibit the appearance of band splitting and new bandgaps. The modulation mechanism has a potential in dispersion engineering, as it allows controlling the number and position of the electromagnetic bandgaps and the in‐band characteristics of the field propagation. Generation of modes with negative group velocities for a given frequency band is also achievable by this technique.