Work

Wideband Nonmagnetic Circulator Based on Spatiotemporally Modulated Resonators Designed With Coupled Microstrip Lines

Year: 2025

Type: article

Abstract: ABSTRACT A wideband spatiotemporally modulated nonmagnetic circulator composed of three time‐varying resonators in Y‐topology is presented in this paper. The triple resonators are designed with coupled microstrip lines and connected to a central node. By applying a time‐modulated signal with a 120° progressive phase shift to the resonators, the angular momentum bias is applied to the structure, thereby achieving the circulator response. To enhance the bandwidth, a step impedance resonator is added to the end of each coupled microstrip line resonator, and therefore achieves broad isolation band for the circulator. As validation, a wideband nonmagnetic circulator with a center frequency of 1.0 GHz was designed, fabricated and measured. The measurement results agree well with the simulations, which the 20‐dB isolation bandwidth is 53 MHz, while the maximum in‐band isolation can achieve 34 dB, and the insertion loss is 1.9 dB.

Source: Microwave and Optical Technology Letters

DOI: 10.1002/mop.70097

Authors: Chao Yang, Yumei Chang, Yan Cao, Qinghua Wang, Xiaomei Xu

Institutions: Nanjing University of Posts and Telecommunications, Anhui University

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: Natural Science Foundation of Anhui Province, National Key Research and Development Program of China

Awards: G2847338936, G8819918786