Miniaturized
            <scp>quad‐band</scp>
            filter with improved selectivity using split ring resonators and metallic strips

Choudhary, Dilip Kumar; Chaudhary, Raghvendra Kumar

doi:10.1002/mmce.22809

Cited by 12 publications

(6 citation statements)

References 20 publications

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“…A split-ring resonator (SRR) can serve as the basis for constructing a negative permeability stopband structure [6]. Numerous studies [7][8][9] have shown that split-ring resonators can be used to create bandpass and band-stop filtering structures. Complementary split-ring resonators (CSRRs) were used to construct a stopband microstrip line in 2004 by Falcone et al [10].…”

Section: Introductionmentioning

confidence: 99%

Development of Compact Bandpass Filter Using Symmetrical Metamaterial Structures for GPS, ISM, Wi-MAX, and WLAN Applications

Vineetha,

Madhav,

Kumar

et al. 2023

Symmetry

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This article describes the development of a compact microstrip bandpass filter (BPF) for multiple wireless communication utilizations. The proposed bandpass filter consists of metamaterial unit cells that are symmetrical in shape. The design process involves the placement of four symmetrical split-ring resonators (SRRs) on the top plane of the BPF. It exhibits improved filter characteristics through the implementation of these SRRs. The filter was modeled and fabricated and its performance was evaluated using a Vector Network Analyzer. The designed bandpass filter shows a 5 GHz bandwidth covering the frequency band spanning from 1 to 5.2 GHz, with a quality factor value of 1.85 across 1.9 GHz, 3.3 across 3.3 GHz and 5.1 across 5.1 GHz. The metamaterial analysis was carried out using ANSYS ELECTRONIC DESKTOP. The proposed filter measures 20 × 18 × 1.6 mm3, which is significantly smaller than current filters. The designed bandpass filter occupies 50% of the space of a conventional filter. The designed bandpass filter exhibits a distributed surface current of 84 A/m, and 94 A/m across the wide- and narrow-band operating frequency. The simulated and measured results indicate that the suggested metamaterial filter is well-suited for multiband wireless applications like GPS (1.57 GHz), WLAN (2.4, 3.6, and 5.2 GHz), Wi-MAX (2.3, 2.5, and 3.5 GHz), and ISM (2.5 GHz).

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Section: Introductionmentioning

confidence: 99%

Development of Compact Bandpass Filter Using Symmetrical Metamaterial Structures for GPS, ISM, Wi-MAX, and WLAN Applications

Vineetha,

Madhav,

Kumar

et al. 2023

Symmetry

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“…To reduce the number of resonators, multimode resonators (MMRs) [9]- [11] are frequently employed. The commonly used structures for multi-mode resonators are stub-loaded resonators [12,13], steppedimpedance resonators [9,12,14] and ring resonator [15]. In [14], a quint-wideband BPF was presented, it adopted spiral and open-loop coupled structures with mixed electric and magnetic coupling (MEMC) to reduce design complexity, but the circuit size was relatively large.…”

Section: Introductionmentioning

confidence: 99%

A Highly Compact Sext-band Bandpass Filter with Simple Structure and Wide Bandwidth

2023

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A highly compact sext-band bandpass filter (BPF) is investigated in this paper, which adopts quad-section stepped impedance resonators (SIRs) along with a series of multiple open stubs. This quad-section SIRs are constructed by tri-section SIR loaded L-shaped resonator. To achieve compact size, the filter utilizes tri-section SIR and is embedded in the double L-shaped resonators. Aseries of multiple open stubs are introduced to improve fractional bandwidth and the return loss. A sext-band BPF centering at 1.12, 2,12, 2,78, 5,59, 6.59 and 8.97 GHz has been designed and fabricated. This highly compact sext-band with wide bandwidth and simple structure is constructed on Rogers 4350 with a dielectric constant of 3.66 and a height of 0.508mm. The overall size of the fabricated filter is 0.15λ g × 0.16λ g . Good agreements are observed between the simulated and measured results.

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“…Nowadays, researchers are more focused on developing miniaturized quad-, penta-, and sext-band BPFs. Different design topologies have been adopted to develop quad-band BPF [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. A popular method to design a quad-band BPF is by using stub-loaded topology [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Multi-Band Bandpass Filter Using Novel Topology for Next-Generation IoT Wireless Systems

Faisal¹,

Khalid²

2022

Computers, Materials &Amp; Continua

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The design of single-and quad-band Bandpass Filter (BPF) topology has been presented in this paper for next-generation Internet of Things (IoT) devices. The main topology is constructed using the Split Ring Resonator (SRR), separated by the Anti-Parallel Coupled Line Structure (APCLS). A detailed analysis of APCLS has been presented, which is further used to construct the single-and quad-band BPF. The single-band BPF design consists of SRR loaded with APCLS. The developed single-band BPF displays a dual-mode response with a center frequency of 2.65 GHz and a measured fractional bandwidth of 17.17%. Moreover, a quad-band bandpass filter has been achieved using the same topology with minor modification in the SRR and APCLS electrical parameters. The developed quad-band BPF generates a dual-mode response having center frequencies of 1.2, 2.4, 3.5, and 4.7 GHz with the measured fractional bandwidth of 13%, 26%, 16%, and 5%, respectively. Two prototypes have been fabricated on the highfrequency substrate to validate the proposed topologies. Very high rejection in the stopbands region, little in-band insertion loss, and very selective passband have been measured for single-and quad-band BPFs. The measured and simulated results are well correlated.

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Miniaturized quad‐band filter with improved selectivity using split ring resonators and metallic strips

Cited by 12 publications

References 20 publications

Development of Compact Bandpass Filter Using Symmetrical Metamaterial Structures for GPS, ISM, Wi-MAX, and WLAN Applications

Development of Compact Bandpass Filter Using Symmetrical Metamaterial Structures for GPS, ISM, Wi-MAX, and WLAN Applications

A Highly Compact Sext-band Bandpass Filter with Simple Structure and Wide Bandwidth

Multi-Band Bandpass Filter Using Novel Topology for Next-Generation IoT Wireless Systems

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