Concurrent Mode-Division Multiplexed Half-Mode Substrate-Integrated Waveguide Link With Three Independent Data Channels

Concurrent Mode-Division Multiplexed Half-Mode Substrate-Integrated Waveguide Link With Three Independent Data Channels

This article introduces a three-channel half-mode substrate-integrated waveguide (HMSIW) link. The link achieves three independent channels by stacking two HMSIWs vertically, with one of them utilizing both the fundamental and the first higher-order modes (<inline-formula><tex-math notation...

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Bibliographic Details
Main Authors: Mohamed Elsawaf, Constantine Sideris
Format: Article
Language:English
Published: IEEE 2025-01-01
Series:IEEE Journal of Microwaves
Subjects:
Bandwidth density
half-mode substrate-integrated waveguide (HMSIW)
interconnect
multi-mode
multi-channel
wireline
Online Access:https://ieeexplore.ieee.org/document/10795442/
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Summary:This article introduces a three-channel half-mode substrate-integrated waveguide (HMSIW) link. The link achieves three independent channels by stacking two HMSIWs vertically, with one of them utilizing both the fundamental and the first higher-order modes (<inline-formula><tex-math notation="LaTeX">$TE_{0.50}$</tex-math></inline-formula> and <inline-formula><tex-math notation="LaTeX">$TE_{1.50}$</tex-math></inline-formula>). Methods for selective excitation of both modes with good overall cross-modal isolation are introduced and presented. Furthermore, real-time eye-diagram measurements of the link using a pseudo-random binary sequence (PRBS) and on-off keying (OOK) modulation are presented in addition to a full MATLAB simulation model of the link showing its performance under quadrature amplitude modulation (QAM). The measured 10-dB return loss (RL) BW of the channels are more than 4 GHz (12&#x2013;16 GHz) for the <inline-formula><tex-math notation="LaTeX">$TE_{0.50}$</tex-math></inline-formula> modes along the two HMSIWs, and 3.6 GHz of the first higher-order mode <inline-formula><tex-math notation="LaTeX">$TE_{1.50}$</tex-math></inline-formula> (12.1&#x2013;15.7 GHz), corresponding to a concurrent bandwidth of 3.6 GHz with more than 15 dB of isolation between the channels. To the best of our knowledge, this is the first demonstration of a three-channel link using HMSIWs. The structure is fabricated and measurements agree well with the electromagnetic simulations.
ISSN:2692-8388

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