Miniaturized dual-wideband bandpass filter using coupled slotted open stubs

Alburaikan, Abdullah; Aqeeli, Mohammed; Hu, Zhirun

doi:10.1109/mwsym.2016.7540156

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…e results show a good electrical performance; however, the additional passbands would make the size of the BPF greater and the bandwidth narrower. Several studies on miniaturized microstrip BPFs have been reported such as BPFs using microstrip E-shaped bandpass filters [23], coupled slotted open stubs [24], and meander coupled lines [25].…”

Section: Introductionmentioning

confidence: 99%

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Multiwideband Bandpass Filter Based on Folded Quad Cross-Stub Stepped Impedance Resonator

Wibisono

Herudin

Wildan³

et al. 2020

International Journal of Antennas and Propagation

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A multiwideband bandpass filter (MW-BPF) using a quad cross-stub stepped impedance resonator (QC-SSIR) was simulated, fabricated, and measured. The proposed QC-SSIR is designed on a four-series arrangement of crossed open stub (COS) structures where each open stub is developed with a step impedance resonator (SIR) structure to generate a wide bandwidth. Compared to the COS resonator, the QC-SSIR has a wider fractional bandwidth and good transmission coefficients and is compact. ABCD matrix analysis is used to investigate the filter structure. Furthermore, the MW-BPF is designed on an FR4 microstrip substrate with εr = 4.4, thickness h = 1.6 mm, and tan δ = 0.0265. The results show that the proposed MW-BPF using a QC-SSIR achieves transmission coefficients/fractional bandwidths of −0.60 dB/49.3%, −1.49 dB/18.7%, and −1.93 dB/13.9% at 0.81 GHz, 1.71 GHz, and 2.58 GHz, respectively. Furthermore, to reduce the filter size, a folded QC-SSIR (FQC-SSIR) structure was also proposed. The results show that the proposed MW-BPF using an FQC-SSIR achieves transmission coefficients/fractional bandwidths of −0.57 dB/49.6%, −1.21 dB/17.7%, and −1.76 dB/12.5% at 0.82 GHz, 1.80 GHz, and 2.62 GHz, respectively. The size of the proposed MW-BPF using an FQC-SSIR is reduced by up to 46% compared with the MW-BPF using a QC-SSIR. Finally, the performance of the simulated MW-BPF based on the QC-SSIR and FQC-SSIR was in good agreement with the measurement results.

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Section: Introductionmentioning

confidence: 99%

“…Some research on multiwideband BPF (MW-BPF) was proposed in [24][25][26]. A very compact quintuple band BPF utilizing a multimode stub-loaded resonator (MSLR) was proposed in [26].…”

Section: Introductionmentioning

confidence: 99%

Multiwideband Bandpass Filter Based on Folded Quad Cross-Stub Stepped Impedance Resonator

Wibisono

Herudin

Wildan³

et al. 2020

International Journal of Antennas and Propagation

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show abstract

“…Since these dual-wideband BPFs utilize the periodic and/or the multi-resonance behavior of transmission line resonators to achieve multiple passbands, their circuit sizes become quite large especially for low-frequency applications. In [5], a super-compact dual-wideband BPF is achieved by using bandstop and highpass structures to divide a wide passband into multiple passbands. In [6], a novel dualwideband BPF comprising of composite series and shunt resonators is presented.…”

Section: Introductionmentioning

confidence: 99%

Size-Reduction of Dual-Wideband Bandpass Filters Using Bridged-T Coils

Wang

Lin

2019

IEEE Access

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In this paper, reduced-sized dual-wideband bandpass filter designs using bridged-T coils are proposed. The bridged-T coil can be designed as a wideband lumped-element equivalent of the transmission line, and it is used to replace all or part of the transmission line sections in a conventional dual-wideband bandpass filter for very efficient circuit size reduction. The tradeoff between circuit size and insertion loss is investigated, and practical design examples are presented to demonstrate the filter performance.

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Miniaturized dual-wideband bandpass filter using coupled slotted open stubs

Cited by 2 publications

References 7 publications

Multiwideband Bandpass Filter Based on Folded Quad Cross-Stub Stepped Impedance Resonator

Multiwideband Bandpass Filter Based on Folded Quad Cross-Stub Stepped Impedance Resonator

Size-Reduction of Dual-Wideband Bandpass Filters Using Bridged-T Coils

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