2022
DOI: 10.1109/tmtt.2022.3200102
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Synthesis and Measurement of DBE Exceptional Points in Substrate-Integrated Waveguides

Abstract: This paper proposes a method to engineer degenerate band-edge conditions in periodic substrate-integrated waveguides (SIWs). A degenerate band edge is a fourth-order exceptional point originating from the coupling of four Floquet-Bloch modes; it leads to a dispersion relation flatter than a regular band edge and is suitable to design slow-wave structures and high Q-factor resonators. Design guidelines to achieve a degenerate band edge point are given based on Bloch analyses of unit cells. An oblique line of vi… Show more

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Cited by 2 publications
(1 citation statement)
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“…7(a) is complex and it is the result of few mode interactions. One can also recognize that both dispersion curves have a minimum (either at βd/π = 0 or at βd/π = 2) between two maxima, which is a condition related to the split band edge (SBE) discussed in [35], [36] and that may lead also to the presence of a degenerate band edge (DBE) [35], [37], [38] when properly selecting the dimensions. A proposed application of the DBE in linear beam devices is the "multimode synchronization regime" for low threshold BWOs [39], [40].…”
Section: Appendix a Different Bb Glide Swsmentioning
confidence: 99%
“…7(a) is complex and it is the result of few mode interactions. One can also recognize that both dispersion curves have a minimum (either at βd/π = 0 or at βd/π = 2) between two maxima, which is a condition related to the split band edge (SBE) discussed in [35], [36] and that may lead also to the presence of a degenerate band edge (DBE) [35], [37], [38] when properly selecting the dimensions. A proposed application of the DBE in linear beam devices is the "multimode synchronization regime" for low threshold BWOs [39], [40].…”
Section: Appendix a Different Bb Glide Swsmentioning
confidence: 99%