A Topological Directional Coupler Fed by Microstrip Line with Configurable Coupling Coefficient
Abstract
Topological waveguides have been extensively studied for their robust transmission properties immune to defects and their application potentials for microwave and terahertz integrated circuits. In this work, by using grounded planar valley-Hall photonic topological insulators, a high-efficiency topological directional coupler fed directly by microstrip line with configurable coupling coefficient is theoretically proposed and experimentally demonstrated. The topological directional coupler consists of two coupled topological waveguides, which can be directly integrated with microstrip circuits. Different coupling coefficients were achieved by configuring the coupling between the two topological waveguides. Both simulation and measurement demonstrated the proposed designs. In addition, the proposed design is applicable in both microwave and terahertz bands.
Keywords
Cite
@article{arxiv.2210.06995,
title = {A Topological Directional Coupler Fed by Microstrip Line with Configurable Coupling Coefficient},
author = {HongYu Shi and BoLin Li and Wei. E. I. Sha and ZhiHao Lan and Fei Gao and JianJia Yi and AnXue Zhang and Zhuo Xu},
journal= {arXiv preprint arXiv:2210.06995},
year = {2022}
}