Tunable transmission and harmonic generation in nonlinear metamaterials

TL;DR

This paper demonstrates a tunable nonlinear metamaterial at microwave frequencies that allows dynamic control of transmission and harmonic generation through power-dependent effects enabled by varactor diodes.

Contribution

The study introduces a novel nonlinear metamaterial with tunable magnetic resonance and harmonic generation capabilities using varactor diodes embedded in split-ring resonators.

Findings

Transmission becomes power-dependent at higher input powers.

Experimental demonstration of selective higher harmonic generation.

Dynamic tuning of magnetic resonance via input power variation.

Abstract

We study the properties of a tunable nonlinear metamaterial operating at microwave frequencies. We fabricate the nonlinear metamaterial composed of double split-ring resonators and wires where a varactor diode is introduced into each resonator so that the magnetic resonance can be tuned dynamically by varying the input power. We show that at higher powers the transmission of the metamaterial becomes power dependent, and we demonstrate experimentally power-dependent transmission properties and selective generation of higher harmonics.