Design of a Compact Ultra-Wideband Microstrip Bandpass Filter

Li, Chen; Ma, Zhonghua; Chen, Jia-Xiang; Wang, Meng-Nan; Huang, Jianmei

doi:10.3390/electronics12071728

Cited by 15 publications

(7 citation statements)

References 30 publications

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“…The design incorporates DGS cells and blind holes to improve the filter performance. Measurement and simulation results in [53] show 41% FBW and 0.58 dB insertion loss at the working frequency of 12.795 GHz.…”

Section: Introductionmentioning

confidence: 97%

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A Compact Microwave Quadrature Hybrid Coupler Using Capacitive Composite Lines and Meandered Stubs

Roshani,

Yahya,

Assaad

et al. 2023

Symmetry

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In this paper, a new structure of the quadrature hybrid coupler (QHC) with compact size is proposed using capacitive composite lines and meandered open stubs. The proposed coupler works at 1.6 GHz with a 0.4 GHz bandwidth, which shows 25% fractional bandwidth (FBW). The proposed QHC occupies only 15 mm × 15 mm (0.12 λ × 0.12 λ), while the typical QHC size is 32 mm × 32 mm (0.25 λ × 25 λ) at the same working frequency. In the designed structure, two symmetric meandered stubs and two symmetric π-shaped composite networks including capacitors and microstrip lines are applied together. The designed QHC has a small size and occupies only 22% of the area of the conventional QHC, resulting in a 78% size reduction. The designed prototype has been analyzed, fabricated and tested, and the experimental results verify the simulated and analysis results. The results show a better than 27 dB return loss, more than 28 dB isolation between the output ports and less than 0.4 dB insertion loss at the working frequency of 1600 MHz. With the achieved desirable specifications, the fabricated QHC is a suitable choice for wireless microwave applications.

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Section: Introductionmentioning

confidence: 97%

“…In [53], a design for a broadband filter utilizing a multilayer structure is presented. This multilayer structure was constructed by bonding three dielectric substrates with different thicknesses.…”

Section: Introductionmentioning

confidence: 99%

A Compact Microwave Quadrature Hybrid Coupler Using Capacitive Composite Lines and Meandered Stubs

Roshani,

Yahya,

Assaad

et al. 2023

Symmetry

View full text Add to dashboard Cite

show abstract

“…However, the selectivity of the filters can be further improved. To improve selectivity, quarter‐wavelength terminal‐open stubs are introduced to achieve two transmission zeros (TZs) in Li et al 5 In Feng et al, 6 frequency selection and signal segmentation are integrated into filtering power divider (FPD) to design multifunctional power divider. In Zhang et al, 7–10 microstrip‐to‐slotline transition structures, differently coupled lines, and resonators were used to implement FPDs.…”

Section: Introductionmentioning

confidence: 99%

Design of dual‐band FPD with high selectivity based on QMRLR

Zhang,

Chen,

Liu

et al. 2024

Micro & Optical Tech Letters

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In this brief, a filtering power divider (FPD) with independently controllable four transmission zeros (TZs) and low insertion loss is designed and analyzed by using quad‐mode ring‐loaded resonator (QMRLR). The equivalent circuit of the proposed FPD is given, and the resonant characteristics of the resonator are analyzed. Due to the horizontal transmission interference of QMRLR, two TZs are realized. In addition, two TZs and one transmission pole are achieved by stepped impedance lines, achieving high selectivity within the passbands. The insertion loss is less than 0.5 dB, which is better than other FPDs. For demonstration, a prototype with center frequencies at 1.45 and 2.75 GHz is fabricated and measured. The measured and simulated results are presented with good agreement.

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“…The use of complementary split-ring resonators in the design of filters with broad and deep stopbands is becoming more common [12][13][14][15]. Bandpass filters have also been created based on open-loop resonators and DGS methods [16][17][18][19]. The performance of band-stop filters has been improved significantly by this technique.…”

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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Design of a Compact Ultra-Wideband Microstrip Bandpass Filter

Cited by 15 publications

References 30 publications

A Compact Microwave Quadrature Hybrid Coupler Using Capacitive Composite Lines and Meandered Stubs

A Compact Microwave Quadrature Hybrid Coupler Using Capacitive Composite Lines and Meandered Stubs

Design of dual‐band FPD with high selectivity based on QMRLR

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

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