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Recently, topological ring resonators (TRRs) have emerged as a burgeoning platform for exploring the topological aspects of photonic systems and resonator dynamics. Integrating topology into cavity dynamics offers a new paradigm to unveil various fascinating phenomena, including backscattering immune wave propagation, unidirectional transmission, and reflection-free energy transport. With this background, we provide a scheme to achieve robust high Q resonances in a metal-based topological photonic crystal (TPC) exhibiting defect-immune spectral characteristics in the microwave frequency regime. Coupled with a ring resonator, our proposed topological platform demonstrates the excitation of high Q resonances in the range 230–540. Except for the resonances, a robust microwave transmission ( ∼ 0 dB ) is observed in the investigated frequency regime 7.1–7.6 GHz depicting a minimal scattering loss even around the sharp corners of the ring resonator. Further, the topological robustness of the propagating microwave and the excited resonances are examined by introducing an external Si obstacle at the domain interface. Our study reveals a minimal transmission loss ( < 7 dB ) and negligible perturbation ( < 8 % ) in the Q factors when the Si barrier placed towards the input end of the straight topological waveguide. In addition, we have also demonstrated a novel way of exciting new resonances in the ring resonator that holds considerable promise for designing a TRR-based all-pass notch filter in the microwave regime. [ABSTRACT FROM AUTHOR]

Keywords: NMC Charkha; wool-cotton blend; Khadi fabrics; thermal properties; fabric comfort; ; ; ; EN NMC Charkha wool-cotton blend Khadi fabrics thermal properties fabric comfort ZH 7728 7737 10 11/21/22 20221220 NES 221220 Introduction I Khadi i is an Indian traditional fabric which was introduced by M. K. Gandhi in 1918 to make villagers self-employed and self-sustained as an alternative to machine-made imported fabric. The fabric thermal properties are also influenced by fabric thickness, fabric cover factor, and yarn linear density of the fabric. The dependent variables, i.e. air permeability, water vapor permeability, and thermal properties affected by the wool-cotton blend composition of warp, the proportion of AM wool in weft yarn, and weft yarn linear density. These results infer that wool content in warp yarn, AM wool proportion in weft yarn, and weft yarn count contribute 81.9%, while the other factors i.e. yarn and fabric structure contribute about 18%. [Extracted from the article]

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