时空调制传输线中的非互易信号增长

Nonreciprocal signal growth in space-time modulated transmission lines.

作者信息

Hagag Mohamed F, Jones Thomas R, Seddik Karim, Peroulis Dimitrios

机构信息

Electronic Engineering Department, Military Technical College, Cairo, 11766, Egypt.

Electronics and Communications Engineering Department, American University in Cairo, Cairo, 11835, Egypt.

出版信息

Sci Rep. 2025 May 30;15(1):18992. doi: 10.1038/s41598-025-03006-7.

DOI:10.1038/s41598-025-03006-7

PMID:40447678

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12125240/

Abstract

Nonreciprocity in space-time modulated photonic crystals has been explored in the context of nonreciprocal propagation and polarization. In this study, we investigate reconfigurable nonreciprocal wave growth in space-time modulated crystals. By imposing an adaptable progressive phase shift between successive time-modulated cells, we induce blue and red shifts in the forward and backward momentum band gaps around the typical normalized growth frequency of 0.5. This spatiotemporal scheme is applied to engineer the dispersion relation of a loaded transmission line-a 1D periodic structure-in the microwave regime. The nonreciprocal wave growth is studied and analyzed under conditions that either allow or forbid backward propagation.

摘要

在非互易传播和偏振的背景下，已经对时空调制光子晶体中的非互易性进行了研究。在本研究中，我们研究了时空调制晶体中可重构的非互易波增长。通过在连续的时间调制单元之间施加适应性的渐进相移，我们在典型归一化增长频率0.5附近的向前和向后动量带隙中诱导了蓝移和红移。这种时空方案被应用于设计微波频段加载传输线（一种一维周期性结构）的色散关系。在允许或禁止向后传播的条件下，对非互易波增长进行了研究和分析。