An asymmetric spiral-shaped DGS optimized by genetic algorithm for wideband common-mode suppression

Li, Yong Sheng; Wei, Xing; Li, Er Ping

doi:10.1109/apemc.2015.7175244

Cited by 1 publication

(1 citation statement)

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“…To minimize the BPF dimensions, a bent feed line was loaded by traditional stubs [22]. In a different approach, artificial intelligence has recently been introduced in the microwave and electromagnetic community and used to design a wide-band BPF [23][24][25].…”

Section: Coupling Structurementioning

confidence: 99%

A Design of a Dual-Band Bandpass Filter Based on Modal Analysis for Modern Communication Systems

Lalbakhsh

Alizadeh²,

Ghaderi

et al. 2020

Electronics

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A dual-band bandpass filter (BPF) composed of a coupling structure and a bent T-shaped resonator loaded by small L-shaped stubs is presented in this paper. The first band of the proposed BPF covers 4.6 to 10.6 GHz, showing 78.9% fractional bandwidth (FBW) at 7.6 GHz, and the second passband is cantered at 11.5 GHz with a FBW of 2.34%. The bent T-shaped resonator generates two transmission zeros (TZs) near the wide passband edges, which are used to tune the bandwidth of the first band, and the L-shaped stubs are used to create and control the narrow passband. The selectivity performance of the BPF is analyzed using the transfer function extracted from the lumped circuit model verified by a detailed even/odd mode analysis. The BPF presents a flat group delay (GD) of 0.45 ns and an insertion loss (IL) less than 0.6 dB in the wide passband and a 0.92 IL in the narrow passband. A prototype of the proposed BPF is fabricated and tested, showing very good agreement between the numerically predicted and measured results.

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