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Magnetless Nonreciprocal Microstrip Filter With Low Insertion Loss and Reconfigurable Frequency

Year: 2025

Type: article

Abstract: ABSTRACT This paper presents a low insertion loss frequency reconfigurable magnetless nonreciprocal filter based on time‐modulated microstrip resonators. To achieve nonreciprocity, modulation signals are applied to the varactors through the microstrip circuits connected to each resonator. The center frequency of the proposed filter can be continuously tuned by changing the DC bias voltage applied to the varactors. We designed, simulated, and experimentally validated a fourth‐order microstrip nonreciprocal bandpass filter at L‐band. The results confirm that the center frequency of the proposed nonreciprocal filter can be tuned from 1.37 to 1.78 GHz (1.3:1 tuning) with a forward insertion loss from 2.1 to 2.6 dB and a backward isolation from 25 to 32 dB.

Source: Microwave and Optical Technology Letters

DOI: 10.1002/mop.70442

Authors: Jiawei Zang, Yang Gao

Institutions: China Academy of Information and Communications Technology, Zhengzhou University

Language: English

Topic: Microwave Engineering and Waveguides

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

OpenAlex ID: W4415613804

FWCI:

Cites: 10

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