Design of the quasi-0 dB backward wave-coupled line coupler using CRLH-TL based on stepped-impedance open stub-loaded dual-mode resonator

Kumar, Abhishek; Upadhyay, Dileep Kumar; Pal, Srikanta

doi:10.1080/09205071.2020.1758221

Cited by 3 publications

(2 citation statements)

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“…The two 0-dB couplers based on the microstrip technology are presented in. 30,31 They exhibit a narrow band performance, operating at much lower frequencies than the proposed coupler with worse insertion loss, return loss, and isolation for the coupler presented in. 31 The SIW coupler presented in 15 is three-dimensional with complex design and structure that complicates its fabrication and integration with other circuits, in addition to the radiation problem due to its three-dimensional design.…”

Section: Comparison With the Similar Workmentioning

confidence: 93%

“…The frequency band, insertion loss, return loss, isolation, and technology of the proposed 0‐dB coupler are compared with others found in literature as shown in Table 6. The two 0‐dB couplers based on the microstrip technology are presented in 30,31 . They exhibit a narrow band performance, operating at much lower frequencies than the proposed coupler with worse insertion loss, return loss, and isolation for the coupler presented in 31 .…”

Section: Comparison With the Similar Workmentioning

confidence: 99%

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A novel design of printed ridge gap waveguide‐based 0‐dB backward‐wave coupler

Shady

Allam

2022

Int J RF Mic Comp-Aid Eng

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This article presents the design and implementation of a 0-dB coupler based on Gap Waveguide (GW) technology. The proposed coupler is considered as the first backward-wave 0-dB realized using this technology. It operates at a central frequency of 30.5 GHz and maintains good performance regarding isolation and directivity all over the band. A parametric sweep is carried out to study the effect of the coupling section dimensions on the coupler performance to achieve nearly 0-dB coupler. The design is based on finite difference time domain (FDTD) analysis using CST microwave studio and Finite Element Method (FEM) using Ansoft HFSS for validation. The novelty of this article is that the achievable coupling section structure is considered as a genuine design for most 0-dB couplers for different operating frequency bands with its corresponding unit cell design based on GW technology. To validate this concept, the design steps are applied to four different frequency bands without changing the shape of the coupling section. The corresponding GW feeding networks are implemented on different materials for different couplers: Rogers RT5880, Rogers RO3003, and Rogers RO4350B. Furthermore, one of the couplers is fabricated and tested. The measured and simulated results show an acceptable agreement.0-dB coupler, backward-wave, compact, gap waveguide technology, printed ridge gap waveguide | INTRODUCTIONConventional waveguides suffer from many drawbacks, especially at mm-wave frequencies such as high signal dispersion, difficulty of fabrication and ability of integration with other networks. A suitable waveguide was needed to operate at higher frequencies. As a result, gap waveguide (GW) technology appeared 1 as a possible alternative to be used in such bands without any of the previously mentioned limitations.

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Section: Comparison With the Similar Workmentioning

confidence: 93%

Section: Comparison With the Similar Workmentioning

confidence: 99%