Miniaturized dual-band bandpass filter using E-shape microstrip structure

Hammed, Raaed T.

doi:10.1016/j.aeue.2015.08.003

Cited by 20 publications

(8 citation statements)

References 8 publications

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“…Microstrip bandpass filters (BPFs) are fundamental parts of superheterodyne receivers that are currently used in many radio frequency and microwave communication systems [1,2]. There are several techniques for designing BPFs, such as coupled structures, stepped-impedance structures, open-circuit stubs, T-shaped resonators, substrate integrated waveguide technology, and balance differential topology [3][4][5][6]. One of the most commonly used methods for designing a BPF is the use of parallel coupled lines due to the method's practical efficiency, high selectivity, low insertion loss, sharp skirt characteristics, flat structure, low-cost synthesis method, compactness of the coupling capacitor, easy integration, and a wide-range fractional bandwidth (FBW) [7].…”

Section: Introductionmentioning

confidence: 99%

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Design and fabrication of a novel multilayer bandpass filter with high‐order harmonics suppression using parallel coupled microstrip filter

2022

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This study presents a novel multilayer structure of parallel coupled‐line bandpass filtercentered at 2.42 GHz with a fractional bandwidth value of approximately 19.4%. The designed filter can suppress harmonics with an appropriate frequency response by incorporating different techniques based on the multilayer technique. A combination of different techniques such as radial microstrip stubs and defected ground structure (DGS) and defected microstrip structure techniques are employed to suppress harmonics up to 5f0. These techniques are used in two layers to suppress up to 5f0. In addition, in this study, the effects of different parameters, such as the width of slot‐line DGS, the angle of diagonal line slots in the upper layer, and the air gap between the two layers on the filter performance, are investigated. To verify the correct circuit operation, the designed filter is implemented and tested. The measurement results of the proposed filter are compared with the simulation results.

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Section: Introductionmentioning

confidence: 99%

“…In [4], a combination of a T-shaped resonator and a coupled feed line is used to design and fabricate BPFs [4]. In [5], the defected coplanar waveguide (CPW) is used to design a dual-band BPF [5]. In [6], coupled resonators are utilized to design a dual-layer balance BPF with high return loss (RL) in the passband.…”

Section: Introductionmentioning

confidence: 99%

Design and fabrication of a novel multilayer bandpass filter with high‐order harmonics suppression using parallel coupled microstrip filter

2022

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“…With the rise of new wireless technologies [1][2][3][4][5], compact and low cost high-performance microwave filters are highly recommended. However, dual-band bandpass filters with some or all these characteristics are developed using several design techniques and technologies [6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Based on microstrip technology [6][7][8][9][10][11], dual narrow-passband filters are investigated using parallel stepped impedance open stubs in [6] and grounded stepped impedance resonator in [7].…”

Section: Introductionmentioning

confidence: 99%

Double-Layered T-Shape Loaded Hairpin Resonator for High Performance Characteristic Dual Band BPF Design

Mohammed

Hammed

2022

Preprint

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A simple high performance compact dual band bandpass filter is developed in this paper based on multilayered T-shape loaded hairpin resonator (T-SLHR). The filter circuit is constructed using two substrates. On the first ground plane substrate, two T-SLHRs are analyzed and electrically coupled through a space gap to accomplish the desired dual passbands. To acquire the filtering response, an input/output grounded hairpin-stub is patterned on a second ungrounded-substrate and broadside coupled to the T-SLHRs. To validate the proposed concept, a dual-band BPF is realized for a multi-wireless network system working at 2.4 GHz and 3.5 GHz center frequencies. Indeed, the T-SLHR is analyzed based on odd-even theory to generate the specified frequencies. Furthermore, a block-diagram to explain the coupling mechanism of the expected filtering attitude is suggested. Moreover, the simulated filter is manufactured and its results from measurement and simulation are compared and discussed. The produced filter has quite small area less than 126 mm 2 , high skirt roll-off selectivity and good isolation rejection band.

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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%

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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Miniaturized dual-band bandpass filter using E-shape microstrip structure

Cited by 20 publications

References 8 publications

Design and fabrication of a novel multilayer bandpass filter with high‐order harmonics suppression using parallel coupled microstrip filter

Design and fabrication of a novel multilayer bandpass filter with high‐order harmonics suppression using parallel coupled microstrip filter

Double-Layered T-Shape Loaded Hairpin Resonator for High Performance Characteristic Dual Band BPF Design

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

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