Compact UWB directional coupler with one notch-band

Wei, Feng; Chen, Lei; Guo, Yanxia; Li, Wentao; Shi, Xiaowei

doi:10.1080/09205071.2013.757853

Cited by 2 publications

(2 citation statements)

References 21 publications

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“…In [40], a parallel coupled-line and a stepped impedance resonator were used to shape an ultra-wideband directional coupler. This coupler provided a wide operating band with a compact size, but due to the applied coupled-line, this coupler had high insertion loss.…”

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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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 Ref. , an ultra wideband (UWB) parallel coupled‐line coupler with one notch‐band based on folded stepped impedance resonator, is investigated on wide frequency band. However these edge coupled structures require additional manufacturing to equalize even‐ and odd‐mode phase velocities when realized in microstrip technology.…”

Section: Introductionmentioning

confidence: 99%

Reflective phase shifter based on wideband multi‐section hybrid coupler in slot‐coupled structure

Khajepour

Asadi

Moradi

2017

Micro & Optical Tech Letters

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This article presents a novel reflective phase shifter based on wideband multi‐section 3‐dB hybrid coupler in slot‐coupled structure. By terminating coupled and transmission ports of coupler with rectangular microstrip loads, reflective phase shifter is achieved. It designed on multilayer Rogers RO4003C substrate. The configuration consists of elliptically shaped transmission line and the combination of rectangular and elliptical shaped slots on the ground plane. To improve characteristics of the designed coupler especially in lower frequency band, multi‐section transmission line and altering shape of the slot on ground is proposed. By etching extra rectangular slots on the ground plane the overall size reduction is achieved. Measurement results of the proposed coupler demonstrate coupling of 3 ± 0.7 dB with 90° ± 0.6 phase shift over 1–6 GHz (143%). The novel reflective phase shifter based on the designed coupler provides phase deviation less than 0.7° on 1.2–4.8 GHz (120%). The obtained return loss is better than 10 dB as well as insertion loss is less than 1.2 dB at the frequency band of interest. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:567–573, 2017

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Compact UWB directional coupler with one notch-band

Cited by 2 publications

References 21 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

Reflective phase shifter based on wideband multi‐section hybrid coupler in slot‐coupled structure

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