Design of dual‐band bandpass filter using stepped impedance resonator and defected ground structure

Abstract

This article presents a novel microstrip dual-band bandpass filter (BPF) comprising

A Novel Approach for Realizing 2.4/5.2 GHz Dual-Band BPFs using Twin-Spiral Etched Ground Structure

“…However, in both cases, only one band of the BPFs was excited by DGS, the other band was created using microsrip lines [11,12]. Wu et al constructed a dual-band BPF comprising a defected SIR and a microstrip SIR.…”

“…Such an energy suppression at certain frequency bands is beneficial in creating a bandstop effect. This characteristic was extensively applied to the design of micorstrip filters [10][11][12][13][14][15][16][17][18]. Consequently, it could be a potential candidate approach for design of microstrip BPFs.…”

“…To the best of the current authors' knowledge, the literature contains no proposals for BPFs in which a dual-band response is excited by moving the microstrip feed lines above the EGS. In a word, the EGS-based BPFs presented in [10][11][12][13][14][15] are characterized by either a complicated fabrication process or impractical frequency ranges. Accordingly, this study presents a BPF comprising a pair of twinspiral EGS configuration on the lower substrate and two microstrip feed lines on the upper substrate.…”