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This paper presents a study on the design guidelines for the common-mode filters with cavity-backed dumbbell-shaped defected ground structures (CB-DB-DGSs). An equivalent circuit model was first developed to explain the physical insight of the CB-DB-DGS common-mode filter. With the help of the equivalent circuit model, the design parameters of the DGS and the frequency behavior of the filter are correlated...
In this paper, by installing a filter link in the converter station of a multi terminal direct current (MTDC) system and analyzing its impedance characteristics output, it illustrates that the current measured by the shunt on the HVDC line would be different when fault occurs on the line or not. The filter is made of a smoothing reactor and HVDC filters. According to the current difference, new protection...
A novel compact quintuple-mode stub-loaded resonator and ultrawideband (UWB) bandpass filter (BPF) are proposed in this letter. The proposed resonator can generate two odd modes and three even modes in the desired band. The odd-mode resonance frequencies are exclusively correlated to the modified triple-mode resonator; even-mode resonance frequencies can be flexibly controlled by the impedance-stepped...
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