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In this paper, a refined shift-and-invert Arnoldi technique is used to speed the convergence rate of a large scale nonsymmetrical generalized eigenvalue problem by using refined Ritz vectors to approximate the desired eigenvectors. The finite difference frequency domain (FDFD) method combined with refined shift-and-invert Arnoldi can be used to analyze the properties of arbitrary complex close/open...
In this letter, a novel structure of a single split-ring resonator (S-SRR) is presented and discussed. Two metallic vias are combined with the S-SRR to improve the performance. A coplanar waveguide (CPW) loaded with the new structures and series gaps, which works as a band pass filter is simulated and fabricated. The proposed band pass filter reaches a high level of compactness, which provides a good...
The conventional microstrip bandpass filter has very narrow passband, and its performance is not excellently good. This paper presents a novel ultra-wideband (UWB) filter with good performance by using periodic uniplanar compact photonic bandgap (UC-PBG) cells and multi-interdigital structures. This novel filter owns a passband of 5.6GHz (1.2–6.8GHz) whose fractional bandwidth is 140%. The simulation...
In this paper, a quadruple-mode filter based on the substrate integrated waveguide (SIW) is investigated. The basic element of the filter is a one-third triangular resonator with two electric walls and two virtual magnetic walls. The resonator is called one-third-mode substrate integrated resonator (OTMSIR). The electric field distribution and frequencies of different modes existed in the OTMSIR are...
This paper presented a novel substrate integrated nonradiative dielectric (SINRD) waveguide bandpass filter based on Print Circuit Boards (PCBs). Firstly, by drilling an array of square via-slot or circular via-slot patterns in a substrate we can realize a waveguiding dielectric channel similar to the canonical nonradiative dielectric (NRD) waveguide. Choosing the geometry of the via-slot patterns...
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