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Scattering characteristics of a waveguide section with a pair of antipodal posts are studied. The section is formed by two short rectangular inserts arranged in antipodal position in a cross section of a rectangular waveguide. Influence of changing the posts' dimensions on the section frequency response is numerically investigated. A pole generation mechanism is examined within the concept of the...
This paper investigates the possibility of exciting high quality trapped resonant modes on frequency selective surfaces consisting of identical sub-wavelength metallic inclusions (symmetrically split rings) with no structural asymmetry but exhibitting electrical asymmetry. The electrical symmetry is broken by using different dielectric substrates. The existence of such anti-symmetric trapped mode...
We report on a bistable light transmission through a planar metamaterial consisted of a metal pattern of weakly asymmetric elements placed on a nonlinear substrate which enables sharp resonance response by excitation of a trapped mode. A feedback required for bistability is provided by the coupling between strong trapped mode resonance antiphased currents exited on the metal elements and an intensity...
One-periodic planar arrays of straight wires or metal strips have a long history of applications as quasioptical polarizing devices and partially transparent mirrors. Their properties are well known. Planar double-periodic structures have been used in the microwave, terahertz and optical frequency ranges because of their remarkable electromagnetic properties and manufacturing simplicity. In microwaves,...
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