Dual-mode dual-band bandpass filter using defected ground waveguide

Liu, H.W.; Shen, Li; Zhang, Z.C.; Lim, J.; Ahn, Dal

doi:10.1049/el.2010.1034

Cited by 25 publications

(25 citation statements)

References 7 publications

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“…In [6], three nested dual-mode defected ground structure resonators are used to implement a tri-band filter with relative bandwidth 6.6%, 4.4% and 3.8% at 1.59/1.82/2.44 GHz. In [7], defected ground waveguide is applied to design dual-band filter with relative bandwidth 7.5%, 6.4% at 3.6/5.3 GHz. In [8], a four mode defected ground structure resonator (DGSR) is presented to design dual band filter with relative bandwidth 12.8%, 1.47% at 2.58 GHz and 5.86 GHz respectively.…”

Section: Introductionmentioning

confidence: 99%

A broadband bandpass filter using triple-mode defected ground structure resonator

Zhan

Yang

Chen

et al. 2018

IEICE Electron. Express

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A broadband bandpass filter with a dual-plane structure is proposed. The dual-plane structure consists of a pair of L shaped microstrip feed lines on the top layer and a triple-mode defected ground structure resonator (TMDGSR) on the bottom layer. Electric field distributions and frequency response of the TMDGSR are investigated. A sample filter using TMDGSR with a 31.9% of 3-dB relative bandwidth at the centre frequency of 3.6 GHz is fabricated and measured. The simulation and measurement results show that the TMDGSR has some advantages such as: simple compact triple-mode resonator structure and broadside coupling with feed lines easily, which are very useful in broadband DGS BPFs design.

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Section: Introductionmentioning

confidence: 99%

A broadband bandpass filter using triple-mode defected ground structure resonator

Zhan

Yang

Chen

et al. 2018

IEICE Electron. Express

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“…The second one is to combine two sets of independent resonators with common input/output ports [4][5][6][7][8]. The dual-band BPFs that have features of compactness, good passband/out-of-band performances and operating band selectivity have been developed via two dualmode resonators such as microstrip patches and square loops with perturbations [5][6][7][8]. Most of the aforementioned filters are basically appropriate for the design of narrow band (e.g., less than 10%), and only provide a very limited range of frequency ratio of the two passbands.…”

Section: Introductionmentioning

confidence: 99%

A Stub-Loaded Triple-Mode Sir for Novel High Selectivity Dual-Wideband Micostrip BPF Design

Deng¹,

Liu²,

Zhao³

et al. 2011

PIER Letters

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Abstract-In this letter, a novel high selectivity dual-wideband microstrip bandpass filter (BPF) is proposed using two stub-loaded triple-mode stepped-impedance resonators (SIR) which are the same type but with different sizes. The SIR is formed by attaching one T-type open stub at the center plane and two identical shortcircuited stubs symmetrically to stepped-impedance open microstrip line. And it can generate one odd mode approximatively determined by the stepped-impedance microstrip line and two even modes flexibly controlled by the loaded stubs. Either of the SIRs in this filter can not only separately generate one passband but also control the passband performance. Due to the intrinsic characteristics of the SIR, four transmission zeros can be created to improve the selectivity. A dual-wideband filter with the fractional bandwidth 14.9% for the first band from 3.09 GHz to 3.58 GHz and 10.2% for the second band from 4.99 GHz to 5.53 GHz is designed and fabricated. The filter is evaluated by experiment and simulation with good agreement.

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“…In [6], a defected ground waveguide (DGW) structure was reported; it is compact and easily integrable with planar technology. In this Letter, a novel defected open-loop resonator in slotline configuration is applied to design a compact triple-mode DGW resonator and bandpass filter (BPF).…”

mentioning

confidence: 99%

“…This BPF consists of two layers. On the bottom layer for slotline configuration, a half-wavelength (l/2) open-loop DGW resonator is etched on the backside metallic ground plane [6]. Another two defected T-shape stubs are tapped from outside and inside of the open loop.…”

mentioning

confidence: 99%