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Updated: Dec 30, 2025

Fabrication of Nanopillar-Based Split Ring Resonators for Displacement Current Mediated Resonances in Terahertz Metamaterials
Published on: March 23, 2017
Design and implementation of magnetically-tunable quad-band filter utilizing split-ring resonators at microwave
Cihan Asci1,2, Aydin Sadeqi1,2, Wei Wang1,2
1Nano Lab, Advanced Technology Laboratory, 200 Boston Ave, Medford, MA, 02155, USA.
Abstract:
In this article, we present a magnetically-tunable quad-band filter with high tunability in the frequency range of 2.1-3.9 GHz. A multi-band filter with four stop-bands comprises of a microstrip line coupled to four frequency-selective split-ring resonators (SRRs). We achieve tuning of individual frequency bands using magnetic reed switches connected in between the capacitive gaps of each split-ring resonator. Application of magnetic field tunes this capacitance affecting its resonance frequency. The measured reflection spectrum of the proposed device matches well with the simulation results. The results show more than 25% tunability for each of the four bands with bandwidth values in the range of 30-70 MHz with over 100% overall tunability in the 2.1-3.9 GHz frequency spectrum.
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