A Low-Cost Microwave Filter with Improved Passband and Stopband Characteristics Using Stub Loaded Multiple Mode Resonator for 5G Mid-Band Applications

Alnahwi, Falih M.; Al‐Yasir, Yasir I. A.; Abdulhameed, Abdulghafor A.; Abdullah, Abdulkareem S.; Abd‐Alhameed, Raed A.

doi:10.3390/electronics10040450

Cited by 14 publications

(13 citation statements)

References 40 publications

(52 reference statements)

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“…However, the corresponding even and odd input impedances of the inverted U-shaped element (Figure 2(c-d)) is given as ( 6) and (7), and that of the middle U-shaped resonator (Figure 2(e-f)) by ( 8) and ( 9), and finally for the E-shaped resonator (Figure 2(g-h)) by (10) and (12). It is important to mention that the resonant frequencies are obtained by combining the resonance condition and the phase constant equation of the quasi-TEM mode behavior of the microstrip line [15].…”

Section: Mathematical Modelingmentioning

confidence: 95%

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A dualband bandpass filter with tunable bandwidths for automotive radar and 5G millimeter-wave applications

Balde

Manene

Mbango

2022

IJEECS

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A compact dual wideband bandpass filter for automotive radar (AR) and 5G millimeter-wave (mmWave) applications with adjustable bandwidths is presented in this work. The filter is based on microstrip dual-mode edge-coupled stub-loaded resonators (SLR). The novelty of this configuration is that it allows independent control of the bandwidths which is not obvious for many reported SLR-based filters. To achieve an overall size of 1.23λ_g× 2.02λ_g, these resonators are coupled and bent int o U-shape, T-shape, and E-shape. The U-shaped resonator, based on a quarter-wavelength transmission line, is coupled to the T-shaped element which constitutes the main feed line to obtain the dual-band response. Having a symmetrical structure, the design i s studied using the even-odd mode analysis. The layout is made using the Ansys high-frequency structural simulator (HFSS) and fabricated on Rogers RO3010 with a thickness of 1.28 mm, a dielectric constant of 10.2, and a loss tangent of 0.0022. The measured bandwidths are 660 MHz and 880 MHz at central frequencies of 23.92 GHz and 28.38 GHz respectively. The measured insertion losses are less than 3.9 dB and the return losses are greater than 17 dB in both bands. A good agreement is obtained between simulate d and experimental results.

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Section: Mathematical Modelingmentioning

confidence: 95%

“…Several techniques and methods have been investigated throughout the literature to design high-frequency multiband BPFs [14], among them, multi-mode resonators. A dual-band filter is designed in [15] using stub-loaded multiple mode  ISSN: 2502-4752 Indonesian J Elec Eng & Comp Sci, Vol. 27, No.…”

Section: Introductionmentioning

confidence: 99%

A dualband bandpass filter with tunable bandwidths for automotive radar and 5G millimeter-wave applications

Balde

Manene

Mbango

2022

IJEECS

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“…The antennas used for the EMC test should have specific characteristics such as wide bandwidth, high gain, omnidirectional radiation pattern, and good antenna factor. These designed antennas are intended to work in the very high frequency (VHF) and ultra-high frequency (UHF) bands (30-1000 MHz and 1000-3000 MHz, respectively) [8], to detect the interference emitted from the most critical applications in these bands such as GSM (850-900 MHz), LTE (1800 MHz), UMTS or 3G (2100 MHz), Wi-fi, Bluetooth, Zigbee and more (2400 MHz) [9,10]. VHF Telecommunications Standards Institute (ETSI).…”

Section: Introductionmentioning

confidence: 99%

“…interference emitted from the most critical applications in these bands such 900 MHz), LTE (1800 MHz), UMTS or 3G (2100 MHz), Wi-fi, Bluetooth, Zi (2400 MHz) [9,10]. VHF and UHF bands are classified based on the Euro munications Standards Institute (ETSI).…”

Section: Introductionmentioning

confidence: 99%

Investigation of Broadband Printed Biconical Antenna with Tapered Balun for EMC Measurements

Abdulhameed

Kubik

2021

Energies

Self Cite

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This article investigates the design, modeling, and fabrication of small-size (150 × 90 × 1.6 mm) broadband printed biconical antenna. The proposed antenna is intended for use a reference antenna for electromagnetic interference measurement inside the EMC chamber. The reflection coefficient (S11-parameter) is verified by modeling the equivalent circuit of the structure in terms of lumped elements. This structure offers a −10 dB impedance bandwidth (from 0.65 GHz to 2.3 GHz) with the tapered balun feeding method. Therefore, it has a high probability of estimating the electromagnetic waves emitted from several applications such as GSM, LTE, UMTS, 3G, Wi-fi, Bluetooth, ZigBee and more. The simulated standard antenna parameters are compatible with the measured parameters results. Furthermore, azimuth omnidirectional radiation pattern and well-realized gain (3.8 dBi) are achieved, reflecting good values of antenna factor compared to the commercial design.

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“…In the design of BPFs, several dual-mode planar resonator configurations such as coupled-line, ring, loop, patch and fractal structures have been reported in the literature. Sharp rejection and high-selectivity BPFs were reported using the dual-mode characteristics of coupled-line resonator structures (Velidi and Sanyal, 2010; Wu et al , 2015; Chen, 2016; Das and Chatterjee, 2019; Afzali et al , 2021; Alnahwi et al , 2021; Mohamadinia et al , 2021). In this context, resonators using ring (Chiou et al , 2010; Feng et al , 2015), loop (Gorur, 2004; Mo et al , 2009; Wu et al , 2012; Song et al , 2017) and slotted patch (Liu et al , 2019; Neeboriya, 2019; Zhao et al , 2020) structures were also realized for the design of planar filters with perturbed configurations to obtain a dual-mode response.…”

Section: Introductionmentioning

confidence: 99%

Compact dual-mode microstrip bandpass filter based on slotted square patch resonator

Karthie¹,

J.²,

Yogeshwari³

et al. 2021

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Purpose The purpose of this paper is to present the design of a compact microstrip bandpass filter (BPF) in dual-mode configuration loaded with cross-loop and square ring slots on a square patch resonator for C-band applications. Design/methodology/approach In the proposed design, the dual-mode response for the filter is realized with two transmission zeros (TZs) by the insertion of a perturbation element at the diagonal corner of the square patch resonator with orthogonal feed lines. Such TZs at the edges of the passband result in better selectivity for the proposed BPF. Moreover, the cross-loop and square ring slots are etched on a square patch resonator to obtain a miniaturized BPF. Findings The proposed dual-mode microstrip filter fabricated in RT/duroid 6010 substrate using PCB technology has a measured minimum insertion loss of 1.8 dB and return loss better than 24.5 dB with a fractional bandwidth (FBW) of 6.9%. A compact size of 7.35 × 7.35 mm2 is achieved for the slotted patch resonator-based dual-mode BPF at the center frequency of 4.76 GHz. As compared with the conventional square patch resonator, a size reduction of 61% is achieved with the proposed slotted design. The feasibility of the filter design is confirmed by the good agreement between the measured and simulated responses. The performance of the proposed filter structure is compared with other dual-mode filter works. Originality/value In the proposed work, a compact dual-mode BPF is reported with slotted structures. The conventional square patch resonator is deployed with cross-loop and square ring slots to design a dual-mode filter with a square perturbation element at its diagonal corner. The proposed filter exhibits compact size and favorable performance compared to other dual-mode filter works reported in literature. The aforementioned design of the dual-mode BPF at 4.76 GHz is suitable for applications in the lower part of the C-band.

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A Low-Cost Microwave Filter with Improved Passband and Stopband Characteristics Using Stub Loaded Multiple Mode Resonator for 5G Mid-Band Applications

Cited by 14 publications

References 40 publications

A dualband bandpass filter with tunable bandwidths for automotive radar and 5G millimeter-wave applications

A dualband bandpass filter with tunable bandwidths for automotive radar and 5G millimeter-wave applications

Investigation of Broadband Printed Biconical Antenna with Tapered Balun for EMC Measurements

Compact dual-mode microstrip bandpass filter based on slotted square patch resonator

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