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Pertanika Journal of Science & Technology

Official journal of Universiti Putra Malaysia for scholarly work across science, engineering and related technologies.

e-ISSN 2231-8526 ISSN 0128-7680
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Pre-press article

The Riblet Short-Slot Coupler Using Substrate Integrated Waveguide (SIW) for High-frequency Applications

Nurehansafwanah Khalid, Siti Zuraidah Ibrahim, Mohd Nazri A Karim, Wee Fwen Hoon, Aliya Ashraf Dewani, Khuzairi Masrakin and Saidatul Norlyana Azemi

Pertanika Journal of Science & Technology Pre-Press Published 2024-08-08
https://doi.org/10.47836/pjst.32.5.08
KeywordsK-band, Ku-band, Riblet Short-Slot coupler, substrate integrated waveguide
Article content

Abstract

Substrate Integrated Waveguide (SIW) involves the conductive via holes immersed in a dielectric substrate that connects two substrate plates. This article presents a new SIW technique to enhance the operational bandwidth of the Riblet Short-Slot coupler. To demonstrate the proposed SIW technique, two Riblet Short-Slot couplers are designed and investigated at two different high-frequency ranges, Ku-band and K-band. The bandwidth of the proposed couplers is improved by introducing multiple layers of SIW vias at the center of the couplers’ side wall. Applying this approach minimizes the leakage loss between vias, indicating an improved overall operating bandwidth of 36.31% and 26.32% for Ku-band and K-band, respectively. All vias in both prototypes are realized using an alternative method, without using the Plated-Through-Hole Printed-Circuit-Board (PTH-PCB) machine. In addition, experimental results agree well with the simulated results.
Supporting literature

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