Synthesis and Measurement of DBE Exceptional Points in Substrate-Integrated Waveguides - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue IEEE Transactions on Microwave Theory and Techniques Année : 2022

Synthesis and Measurement of DBE Exceptional Points in Substrate-Integrated Waveguides

Résumé

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 vias in SIW is proposed to form a suitable modal coupling between adjacent waveguides enabling a degenerate band-edge condition. The effect of losses and the robustness to parameter variations are discussed by means of rigorous Bloch analyses. A unit cell showing the best behavior concerning the losses and geometric tolerances is selected and prototypes of finite-length resonators are realized. Measurements validate simulated results and confirm the typical N 5 scaling of the loaded Q factor to the number of cells N of the resonator.
Fichier principal
Vignette du fichier
TMTT-2022-02-0221_manuscript.pdf (2.99 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03929740 , version 1 (08-01-2023)

Identifiants

Citer

Tianyu Zheng, Massimiliano Casaletti, Ahmed F Abdelshafy, Filippo Capolino, Zhuoxiang Ren, et al.. Synthesis and Measurement of DBE Exceptional Points in Substrate-Integrated Waveguides. IEEE Transactions on Microwave Theory and Techniques, 2022, 70 (10), pp.4341-4353. ⟨10.1109/TMTT.2022.3200102⟩. ⟨hal-03929740⟩
19 Consultations
52 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More