Miniaturized design of rat-race coupler by utilizing T-shape stubs

Moubadir, Mahmoud; Aziz, Hicham; Badaoui, Imane; Touhami, Naima Amar; Adnane, M.

doi:10.1016/j.promfg.2018.03.013

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…A suggested future work to improve the proposed structure is to reduce the size of the hybrid coupler. A folding technique for size reduction similar to the geometry of the structures in References can be implemented to the proposed structure. In addition to that, having arbitrary port impedance is very helpful in designing microwave circuits, antenna feed networks, and phased array antennas .…”

Section: Discussionmentioning

confidence: 99%

A planar ultra‐wide band asymmetric rat‐race hybrid coupler

Babaeian

Karmakar

2020

Int J RF Microw Comput Aided Eng

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In this article, an asymmetric ultra-wideband rat-race hybrid coupler with 180 phase shift is proposed. The primary goal of this work is to design a planar ultrawideband hybrid coupler with a microstrip structure by avoiding via holes and multi-layer design. The bandwidth of an asymmetric ring hybrid is enhanced using shorted coupled lines, perturbation impedance techniques, and matching stubs. This hybrid coupler was designed and fabricated using Taconic TLX-8 substrate with a thickness of 0.5 mm. The results of the simulation and measurement are promising and meet the desired specifications. This hybrid coupler yields a fractional bandwidth of 56% at the center frequency of 5.95 GHz based on ±1 amplitude imbalance between two output ports. K E Y W O R D Samplitude imbalance, asymmetric ring hybrid; bandwidth enhancement, phase shift, rat-race hybrid coupler, ultra-wideband (UWB)

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Section: Discussionmentioning

confidence: 99%

A planar ultra‐wide band asymmetric rat‐race hybrid coupler

Babaeian

Karmakar

2020

Int J RF Microw Comput Aided Eng

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“…Similarly, for the rat-race coupler [9] employed an artificial transmission line with a size reduction of 78.6% and [10] used T-shape stubs and achieved a size reduction of 70%. In [11] a stepped impedance technique has been adopted to miniaturize the rat-race coupler.…”

Section: Introductionmentioning

confidence: 99%

A Miniaturized Wideband 3 dB Rat-Race Coupler Utilizing Meander Lines

Kazim

Abbas

Rehman

et al. 2021

2021 1st International Conference on Microwave, Antennas &Amp; Circuits (ICMAC)

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This paper proposes a wideband miniaturized 3 dB 180˚ rat-race coupler. For ease of fabrication and measurement, the operating frequency of the 180˚ coupler is designed from 700-960 MHz. Hence, an operating bandwidth of around 30% is achieved at the center frequency of 830 MHz. A size reduction of 95% is accomplished along with a fractional bandwidth of 30%. A meander line configuration is adopted and gaps between the lines are optimized to enhance the capacitance of the structure. The proposed design is fabricated on Rogers 4360 substrate and measured results of the prototype show good agreement with simulated results.

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Miniaturized design of rat-race coupler by utilizing T-shape stubs

Cited by 2 publications

References 14 publications

A planar ultra‐wide band asymmetric rat‐race hybrid coupler

A planar ultra‐wide band asymmetric rat‐race hybrid coupler

A Miniaturized Wideband 3 dB Rat-Race Coupler Utilizing Meander Lines

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