A Substrate Integrated Gap Waveguide Based Wideband 3-dB Coupler for 5G Applications

A wideband 3-dB coupler using substrate integrated gap waveguide (SIGW) is proposed based on the principle of the branch-line coupler structure. The SIGW coupler design is comprehensively studied. It is found that SIGW conducting ridge vias play a significant role and have a strong impact on the cav...

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Bibliographic Details
Published in:IEEE access 2018, Vol.6, p.66798-66806
Main Authors: Shen, Dongya, Wang, Ke, Zhang, Xiupu
Format: Article
Language:English
Subjects:
Broadband
coupler
Couplers
electromagnetic band gap (EBG)
Electromagnetic waveguides
Frequencies
Impedance
Impedance matching
Metamaterials
Microstrip
Periodic structures
Substrate integrated gap waveguide (SIGW)
substrate integrated waveguide (SIW)
Substrates
Waveguides
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Summary:A wideband 3-dB coupler using substrate integrated gap waveguide (SIGW) is proposed based on the principle of the branch-line coupler structure. The SIGW coupler design is comprehensively studied. It is found that SIGW conducting ridge vias play a significant role and have a strong impact on the cavity resonance, passband, and impedance matching. A prototype of the proposed SIGW coupler is fabricated and tested, and the measured agrees well with the simulated. The coupler, better than the reported, has a passband of ~5 GHz from 23.59 to 29 GHz with the isolation above 20 dB, covering the 24.25-27.5-GHz and 27.5-28.5-GHz frequency bands of 5G.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2018.2879438