Abstract
The algorithms for analyzing of two-layer distributed discontinuities in the form of an inductive section in a microstrip transmission line and an H-shaped slot resonator with a transverse arrangement of dumbbells in its ground plane by the transverse resonance method are improved and developed. This method includes the mutual coupling of components that make up the discontinuity. According to the analysis results, the considered discontinuity is a multifunctional device and has scattering characteristics that contain simultaneously signal transmission and rejection. At this the two-layer discontinuity provides a wideband (up to 40 %) rejection with two-frequency characteristic of resonant reflection, and forms either two narrowband passband filters (about 3 %), or one wideband (up to 10 %) passband.
Highlights
The spectral approach for solution of boundary problems in micro- and millimeter wave range devices design was developed since 80-th years of last century [1]
The transverse resonance technique is based at the spectral approach, in which eigen frequencies of virtual resonators with boundary conditions in the form of electric or magnetic walls are used for scattering characteristics calculation
In the spectral curves graphs, it is expressed in the form of interception points of either of the two curves obtained by solving electric and magnetic boundary problems, as well as in the form of narrow interception region of the first branch corresponded to electric problem solution and the second branch corresponded to magneto-electric problem solution
Summary
The spectral approach for solution of boundary problems in micro- and millimeter wave range devices design was developed since 80-th years of last century [1]. In [2], the resonance frequencies technique calculation for multilayer planar structure consisted of microstripline resonator at coupled lines and tunable slot resonator in second plane is described. This technique is based on field description of shielded structure in spectral domain in the form of hybrid waves and boundary problem solution by Galerkin’s method. The aim of this work is improving the design technique and investigation of the scattering characteristics singularities at a two-layer distributed discontinuity in three-layer planar structure consisted the inductive microstrip section and H-shaped slot resonator with transversal arrangement of the “dumbbells” in ground plane. The potentially advantages of such structures are extended device functionality and compactness compared with conventional slot resonator [19]
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