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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...
The physical background of resonance phenomena such as the “enhanced trans-mission” (through below cutoff holes) and the “optical activity” (polarization plane rotation) is shown by the eigenoscillation analysis of various objects with C2 or C4 symmetry in a square waveguide. Units of three kinds, namely waveguide bifurcations (plane junctions), double-slot or four-slot plane-chiral irises and composite...
A numerical algorithm for the analysis and optimization of broadband polarizers consisting of symmetrically placed rectangular ridges in a coaxial waveguide is developed. Because polarizer boundaries cannot be described in a single (cylindrical or Cartesian) coordinate system, the approach based on a stepped approximation of regular and ridged coaxial waveguides is proposed to apply. The factors influencing...
Small-sized waveguide bandpass filters based on modified split-ring resonators are considered. Extremely compact dimensions are their salient features distinguishing them from known designs. The filters demonstrate enhanced out-of-band suppression in a broad frequency range. We propose a way to reduce the longitudinal dimensions of the filter, consisting in rotation of the adjacent resonators. Arrangement...
The problem of the dominant TE10 mode diffraction by an iris with a thin stepped slot placed in a rectangular waveguide is considered. Placing such an iris into a rectangular waveguide cross-section affects on the appearance of the TE10 mode total transmission resonance in the single mode frequency band. Influence of the geometrical dimensions on the resonance frequency and Q-factor was studied. An...
A general analysis for the modal characterization of multiply connected, hollow, conducting waveguides is presented. It is relevant to waveguides with an orthogon cross-section. The transverse electromagnetic (TEM)-modes are analyzed. The approach described allows getting the exact and high-speed algorithm which lends itself naturally to parallelization.
Waveguide bandstop and notch filters are widely used microwave devices. One of notch filters is in the focus of this paper. It is a stepped conductor in a rectangular waveguide cross-section (inset in Fig. 1). Such a filter provides narrow-band reflection of the TE10 wave at a desired frequency of the operating frequency range. It can be used both as a section of a bandstop filter and as a notch filter...
Usually in solving problems of computational electromagnetics the two ways can be utilized: developing of dedicated (the most optimal method to solve a specific problem) or global computational algorithms (one universal method to solve the wide class of problems). The advantages of the first way are speed and accuracy of algorithm, while the virtue of second way naturally follows from its name. Recently...
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