On the Miniaturization of Microstrip Ring-Hybrid Couplers Using Gielis Supershapes

Tayebi, Azam; Zarifi, Davoud

doi:10.1080/03772063.2020.1859955

Cited by 5 publications

(6 citation statements)

References 18 publications

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“…Table 1 compares the measured results with implementations in [2][3][4][5][6]. Proposed work's return loss (RL), insertion loss (IL), phase imbalance, amplitude imbalance at the operation, fractional bandwidth (FBW), and size are compared with [2][3][4][5][6], respectively. The proposed hybrid has the widest FBW with an RL better than 14.2 dB.…”

Section: Comparison and Discussionmentioning

confidence: 99%

“…The proposed hybrid has smaller IL, phase imbalance, and amplitude imbalance than [2][3][4][5][6], which indicates its good performance. Furthermore, the stacked structure has a smaller size than [2][3][4][5][6] in Table 1.…”

Section: Comparison and Discussionmentioning

confidence: 99%

“…Over the years, several efficient approaches have been reported for miniaturizations [2][3][4][5][6]. In [2], a compact planar microstrip branch-line coupler using equal difference structures is proposed, which reduces the length of quarter-wavelength microstrip line and thus minimizes branch-line coupler dimension.…”

Section: Introductionmentioning

confidence: 99%

“…A compact harmonic suppressed 3 dB coupler using H-shaped transmission line is proposed in [3] with a size reduction of 64%. Moreover, methods such as using anti-parallel lines with open stubs [4], meandered transmission line with broken symmetry between cross-coupling branches [5], and quarter-wavelength supershape transmission lines [6] have been implemented to reduce the size as well. Unfortunately, size reduction stays in conflict with desired electrical performance of microwave components, and it is difficult to optimize the parameters because of the complex geometry structures.…”

Section: Introductionmentioning

confidence: 99%

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Miniaturized Lumped-element LTCC Quadrature Hybrid with LC Stacked Structure

Lu¹,

Bian²,

Zhang³

2022

PIER Letters

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A miniaturized lumped-element quadrature hybrid with a high density stacked structure is proposed in a 24-layer low temperature co-fired ceramic (LTCC) substrate. Stacking verticalinterdigital-capacitors (VICs) and vertically-spiral-inductors are for an entire size reduction. The transition between inductors realized in the inner space of the inductor further improves the utilization of three-dimensional space. The overall size of the quadrature hybrid is only 10.1 × 3.8 × 2.4 mm, or equivalently 0.0040 × 0.0015 × 0.0009λ 3 g , which achieves a size reduction of 30.2%. Meanwhile, the proposed hybrid operates at 60 MHz with a fractional bandwidth (FBW) of 33.3%. The measured S 11 ,

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Section: Comparison and Discussionmentioning

confidence: 99%

Section: Comparison and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Miniaturized Lumped-element LTCC Quadrature Hybrid with LC Stacked Structure

Lu¹,

Bian²,

Zhang³

2022

PIER Letters

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“…In [52], a design for a microstrip ring-hybrid coupler is introduced, which is highly compact and efficient. The long traditional quarter wavelength microstrip lines have been replaced with short quarter-wavelength super shape transmission lines, resulting in a 74% reduction in size compared to conventional ring hybrids.…”

Section: Introductionmentioning

confidence: 99%

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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Design of a miniaturized 90-degree quadrature hybrid coupler with harmonic suppression ability using π-shaped lumped elements

MahdiAbadi,

Roshani,

Parandin

et al. 2024

Sci Rep

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This research presents a new design and fabrication of a quadrature hybrid coupler using π-shaped lumped elements. The proposed π-shaped elements have resulted in ultra-size reduction and harmonic suppression ability simultaneously. The proposed coupler correctly works at 800 MHz, the insertion loss is less than 0.15 dB and more than 26 dB, isolation and return loss are obtained at the operating frequency. The size of the proposed coupler is only 12.8 mm ×12.2 mm, which is equal to 0.046 λg × 0.044 λg, where λg is of the guided-wavelength at 800 MHz. The conventional coupler has a large size of 0.25 λg × 0.25 λg, which is equal to 68.5 mm × 68.5 mm. The proposed coupler provides about 96% size reduction compared to the conventional coupler. Moreover, the proposed quadrature hybrid coupler has wide harmonic suppression from 2.1 GHz to 10 GHz.

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On the Miniaturization of Microstrip Ring-Hybrid Couplers Using Gielis Supershapes

Cited by 5 publications

References 18 publications

Miniaturized Lumped-element LTCC Quadrature Hybrid with LC Stacked Structure

Miniaturized Lumped-element LTCC Quadrature Hybrid with LC Stacked Structure

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

Design of a miniaturized 90-degree quadrature hybrid coupler with harmonic suppression ability using π-shaped lumped elements

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